feat(api): retire prices safely and add a self-serve switch (#2637)

.github/workflows/tests.yaml

@@ -314,8 +314,8 @@ jobs:
           path: |
             ~/.cache/rebar3
             fluxer_gateway/_build
-            !fluxer_gateway/_build/default/lib/fluxer_gateway
-            !fluxer_gateway/_build/test/lib/fluxer_gateway
+            !fluxer_gateway/_build/default/lib/fluxer_gateway/**
+            !fluxer_gateway/_build/test/lib/fluxer_gateway/**
           key: >-
             rebar3-${{ runner.os }}-otp28-rebar3.24.0-${{ hashFiles('fluxer_gateway/rebar.lock',
             'fluxer_gateway/rebar.config') }}
@@ -345,8 +345,8 @@ jobs:
           path: |
             ~/.cache/rebar3
             fluxer_gateway/_build
-            !fluxer_gateway/_build/default/lib/fluxer_gateway
-            !fluxer_gateway/_build/test/lib/fluxer_gateway
+            !fluxer_gateway/_build/default/lib/fluxer_gateway/**
+            !fluxer_gateway/_build/test/lib/fluxer_gateway/**
           key: >-
             rebar3-${{ runner.os }}-otp28-rebar3.24.0-${{ hashFiles('fluxer_gateway/rebar.lock',
             'fluxer_gateway/rebar.config') }}
@@ -426,6 +426,31 @@ jobs:
             'packages/markdown_parser/rust/Cargo.toml', 'packages/markdown_parser/rust/.cargo/config.toml',
             'packages/markdown_parser/rust/src/**') }}
 
+  lint:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 15
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271
+
+      - name: Install Node.js
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e
+        with:
+          node-version: '24'
+          cache: 'pnpm'
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Check formatting and lint
+        run: pnpm exec biome ci .
+
+      - name: Lint JSX for browser-translation safety
+        run: pnpm exec eslint . --max-warnings 0
+
   i18n:
     runs-on: ubuntu-24.04
     timeout-minutes: 25

biome.json

@@ -84,7 +84,18 @@
 				},
 				"useConst": "error",
 				"noNonNullAssertion": "off",
-				"noParameterAssign": "off"
+				"noParameterAssign": "off",
+				"noRestrictedImports": {
+					"level": "error",
+					"options": {
+						"paths": {
+							"@lingui/react": {
+								"importNames": ["I18nProvider"],
+								"message": "Use AppI18nProvider from @app/features/i18n/components/AppI18nProvider so <Trans> output stays safe under page translation."
+							}
+						}
+					}
+				}
 			},
 			"a11y": {
 				"recommended": true,
@@ -116,10 +127,21 @@
 	},
 	"assist": {"actions": {"source": {"organizeImports": "on"}}},
 	"overrides": [
+		{
+			"includes": ["fluxer_app/src/**/*.tsx"],
+			"plugins": ["./tools/lint/no-adjacent-jsx-text.grit"]
+		},
 		{
 			"includes": ["fluxer_docs/scripts/VerifyDocsCoverage.ts"],
 			"linter": {"rules": {"suspicious": {"noTemplateCurlyInString": "off"}}}
 		},
+		{
+			"includes": [
+				"fluxer_app/src/features/i18n/components/AppI18nProvider.tsx",
+				"fluxer_app/src/features/i18n/components/AppI18nProvider.test.tsx"
+			],
+			"linter": {"rules": {"style": {"noRestrictedImports": "off"}}}
+		},
 		{
 			"includes": ["**/*.astro"],
 			"linter": {"rules": {"correctness": {"noUnusedImports": "off", "noUnusedVariables": "off"}}},

deploy/self-hosting/.env.example

@@ -3,12 +3,20 @@
 # A name absent from this file is one Compose does not forward, and it reaches a
 # service only through a Compose override file that adds it to that service's
 # environment. packages/config/src/__tests__/DeployEnvCoverage.test.ts fails when
-# a Compose edit forgets the matching line here.
+# a Compose edit forgets the matching line here. Compose expands this file from
+# top to bottom, so a line written with ${...} has to sit below every name it
+# reads.
 
 FLUXER_DOMAIN=chat.example.com
 FLUXER_PUBLIC_SCHEME=https
 FLUXER_PUBLIC_PORT=443
 
+# The three lines above are the address browsers use, and every endpoint the
+# services advertise carries the port from FLUXER_PUBLIC_PORT. They do not move
+# what the host publishes. FLUXER_HTTP_PORT and FLUXER_HTTPS_PORT further down
+# do that, and a non-default port needs the matching one set as well. Both
+# complete recipes are written out beside them.
+
 # How browsers reach this instance.
 #
 # Default: Fluxer binds 80 and 443 and gets its own Let's Encrypt certificate.
@@ -33,50 +41,71 @@ FLUXER_PUBLIC_PORT=443
 # address if it reaches Fluxer from a public IP.
 #FLUXER_EDGE_TRUSTED_PROXIES=private_ranges
 
-# The public origin browsers use, without a trailing slash. Derived from the three
-# values above and correct for the usual https-on-443 setup, so leave it alone
-# unless you serve Fluxer on a non-default port, where the port must appear here.
+# The origin browsers see, without a trailing slash. Leave it unset and each
+# service builds one from the three values at the top of this file. Set it and it
+# wins: every service reads the host, the scheme and the port out of it and
+# ignores those three names. Use it when browsers reach the instance on a host
+# FLUXER_DOMAIN does not name. It has to be a bare origin, a scheme and a host
+# and an optional port and nothing after them, or the services refuse to start.
+# It does not move the edge listener or the published ports either, so set the
+# publish below to the port written here.
 #FLUXER_PUBLIC_ORIGIN=https://chat.example.com
 
-# Overrides the address Fluxer's edge listens on. Honoured in the default mode
-# only: docker-compose.proxy.yml sets the literal :8080 and Compose lets the last
-# file win, so a value here is discarded under the proxy overlay with no warning.
-# Set it only for an unusual default-mode layout, such as serving several
-# hostnames or binding a non-default TLS port.
-#FLUXER_EDGE_SITE_ADDRESS=chat.example.com
+# Overrides the address the edge listens on inside its container. Compose builds
+# it from FLUXER_PUBLIC_SCHEME and FLUXER_DOMAIN with no port, and the edge keeps
+# its container ports at 80 and 443 whatever the public port is. Caddy matches a
+# site by host and ignores the port in the Host header, so a request arriving on
+# a non-default published port still lands on this site. Put a port in this value
+# only if you also publish that same container port below, or nothing will be
+# listening where the publish points. Honoured in the default mode only:
+# docker-compose.proxy.yml sets the literal :8080 and tunnel.compose.yml the
+# literal :80, and Compose lets the last file win, so a value here is discarded
+# under either overlay with no warning. Set it for an unusual default-mode
+# layout, such as serving several hostnames. Write the scheme into it: a bare
+# hostname means automatic HTTPS on 443 whatever FLUXER_PUBLIC_SCHEME says.
+#FLUXER_EDGE_SITE_ADDRESS=https://chat.example.com
 
 # The old name for the value above. It is read only when
 # FLUXER_EDGE_SITE_ADDRESS is unset, so an existing .env keeps the listener
 # it already had. Rename it to FLUXER_EDGE_SITE_ADDRESS at your convenience.
 #FLUXER_CADDY_SITE_ADDRESS=
 
-# FLUXER_PUBLIC_ORIGIN is the origin browsers see. It must carry the port
-# whenever FLUXER_PUBLIC_PORT is not the default for its scheme, because an
-# origin written with a default port never matches a browser Origin header.
-# Serving on any other port means setting all three, plus the published port
-# below, and pointing FLUXER_EDGE_SITE_ADDRESS at the same scheme and host.
-# Compose expands this file from top to bottom, so FLUXER_PUBLIC_ORIGIN has to
-# stay below the two values it reads. Above them it silently expands to a bare
-# host with a trailing colon.
-#FLUXER_PUBLIC_SCHEME=http
-#FLUXER_PUBLIC_PORT=19080
-#FLUXER_PUBLIC_ORIGIN=${FLUXER_PUBLIC_SCHEME}://${FLUXER_DOMAIN}:${FLUXER_PUBLIC_PORT}
-#FLUXER_HTTP_PORT=19080
-
-# Ports Caddy publishes on the host. Caddy still listens on 80 and 443 inside
-# the container, so change only these when something else already owns the
-# standard ports or another proxy sits in front. Both take an optional bind
-# address in front of the port, and 127.0.0.1 keeps the publish off every
-# public interface. FLUXER_HTTPS_PORT moves the TCP and the UDP publish
-# together, because HTTP/3 needs both on the same port.
+# Host side of the edge's publishes, and the only two names that decide which
+# host ports Fluxer binds. The container side is fixed. Container 80 carries the
+# HTTP to HTTPS redirect and the Let's Encrypt HTTP challenge under an https
+# scheme, and the site itself under an http one. Container 443 carries the TLS
+# site. FLUXER_HTTPS_PORT moves the TCP and the UDP publish together, because
+# HTTP/3 needs both on the same port. Both take an optional bind address in front
+# of the port, and 127.0.0.1 keeps the publish off every public interface. Give
+# them different host ports: the same host port on both is two publishes of one
+# port and the edge refuses to start.
 #FLUXER_HTTP_PORT=80
 #FLUXER_HTTPS_PORT=443
 #FLUXER_HTTP_PORT=127.0.0.1:80
 #FLUXER_HTTPS_PORT=127.0.0.1:443
 
+# HTTPS on 8443, complete. Host 80 stays published and still answers the ACME
+# challenge. Let's Encrypt only ever connects to the public 80 or 443, so the
+# certificate is issued if a router in front forwards public 80 to this host and
+# is not issued otherwise. Serve your own certificate from the Caddyfile when it
+# cannot.
+#FLUXER_PUBLIC_PORT=8443
+#FLUXER_HTTPS_PORT=8443
+
+# Plain HTTP on 19080, complete. The port 80 publish moves to 19080, so nothing
+# binds host 80. Under an http scheme nothing listens on container 443, so the
+# last line parks that publish on loopback for a host that wants 443 for
+# something else. Drop it and 443 is published and idle, which is what earlier
+# releases did.
+#FLUXER_PUBLIC_SCHEME=http
+#FLUXER_PUBLIC_PORT=19080
+#FLUXER_HTTP_PORT=19080
+#FLUXER_HTTPS_PORT=127.0.0.1:443
+
 # A tunnel or another proxy in front of the stack needs no HTTPS publish at all.
 # tunnel.compose.yml ships beside this file and replaces Caddy's published ports
-# with a single loopback HTTP publish, so nothing binds 443. FLUXER_HTTP_PORT
+# with a single loopback HTTP publish, so nothing binds 443, and points the edge
+# at plain HTTP on that publish so it stops redirecting to https. FLUXER_HTTP_PORT
 # still moves that one publish. Set the line below and plain docker compose
 # commands pick the file up, or add it to your own -f flags if you pass any. The
 # file uses the !override tag, which needs Compose 2.24.4 or newer.
@@ -88,6 +117,60 @@ FLUXER_IMAGE_TAG=v1
 
 POSTGRES_PASSWORD=CHANGE_ME
 MEILI_MASTER_KEY=CHANGE_ME
+# The stack ships its own Postgres and its own object store, and points at both
+# by service name. Set these to run either one outside the stack. Leave them
+# unset and the bundled services are used. Taking a service out of the stack
+# means an upgrade skips the backup step that reaches into it, and backing that
+# store up belongs to whoever runs it.
+#FLUXER_POSTGRES_HOST=db.example.com
+#FLUXER_POSTGRES_PORT=5432
+#FLUXER_POSTGRES_DATABASE=fluxer
+#FLUXER_POSTGRES_USERNAME=fluxer
+#FLUXER_POSTGRES_SSL=true
+#FLUXER_S3_ENDPOINT=https://s3.eu-central-1.amazonaws.com
+#FLUXER_S3_PUBLIC_ENDPOINT=https://cdn.example.com
+#FLUXER_S3_REGION=eu-central-1
+#FLUXER_S3_FORCE_PATH_STYLE=false
+# Bucket names. The bundled object store creates whichever names these hold, so
+# the two stay in step. An object store outside the stack needs the buckets to
+# exist already.
+#FLUXER_S3_BUCKET_CDN=fluxer
+#FLUXER_S3_BUCKET_UPLOADS=fluxer-uploads
+#FLUXER_S3_BUCKET_DOWNLOADS=fluxer-downloads
+#FLUXER_S3_BUCKET_REPORTS=fluxer-reports
+#FLUXER_S3_BUCKET_HARVESTS=fluxer-harvests
+
+# The rest of the bundled services, pointed somewhere else the same way. Leave a
+# line unset and the service in the stack is used. Taking a service out of the
+# stack goes in an override file listed in COMPOSE_FILE, because an upgrade
+# replaces docker-compose.yml.
+#FLUXER_KV_URL=redis://cache.example.com:6379/0
+#FLUXER_NATS_URL=nats://mq.example.com:4222
+#FLUXER_NATS_JETSTREAM_URL=nats://mq.example.com:4222
+#FLUXER_SVC_NATS_URL=nats://mq.example.com:4222
+#FLUXER_SEARCH_URL=https://search.example.com
+#FLUXER_LIVEKIT_INTERNAL_URL=http://livekit.example.com:7880
+
+# Voice off. The livekit service still runs until an override file takes it out.
+#FLUXER_LIVEKIT_ENABLED=false
+
+# Optional systems, each off unless the instance is configured for it.
+#FLUXER_SMS_ENABLED=false
+#FLUXER_STRIPE_ENABLED=false
+#FLUXER_NCMEC_ENABLED=false
+#FLUXER_CLAMAV_ENABLED=false
+
+# The client address. Set the header name a proxy in front actually writes, and
+# turn the trust off when nothing sits in front, because a trusted header an
+# attacker can set is a spoofed client address.
+#FLUXER_CLIENT_IP_HEADER_NAME=cf-connecting-ip
+#FLUXER_TRUST_CLIENT_IP_HEADER=true
+
+# How much the services write. trace, debug, info, warn, error or fatal. Every
+# service names the object storage endpoint and its addressing at info on start,
+# so a bucket that answers 404 is visible without raising this.
+#LOG_LEVEL=debug
+
 FLUXER_S3_ACCESS_KEY=fluxer
 FLUXER_S3_SECRET_KEY=CHANGE_ME
 
@@ -153,9 +236,11 @@ FLUXER_VAPID_PRIVATE_KEY=CHANGE_ME
 LIVEKIT_API_KEY=fluxer
 LIVEKIT_API_SECRET=CHANGE_ME
 
-# The URL browsers use for voice signalling. Derived from FLUXER_PUBLIC_SCHEME,
-# FLUXER_DOMAIN and FLUXER_PUBLIC_PORT as wss://host[:port]/livekit when empty.
-# Set it only when LiveKit is served from another host.
+# The URL browsers use for voice signalling. Compose builds it from
+# FLUXER_PUBLIC_ORIGIN, or from FLUXER_PUBLIC_SCHEME, FLUXER_DOMAIN and
+# FLUXER_PUBLIC_PORT, as that origin followed by /livekit. The client rewrites a
+# leading http to ws itself. Set it only when LiveKit is served from another
+# host.
 #FLUXER_LIVEKIT_URL=
 
 # Media ports. LiveKit advertises these in ICE candidates, so the host must

deploy/self-hosting/docker-compose.yml

@@ -2,61 +2,63 @@ name: fluxer
 
 x-fluxer-postgres-env: &fluxer-postgres-env
   FLUXER_DATABASE_BACKEND: postgres
-  FLUXER_POSTGRES_HOST: postgres
-  FLUXER_POSTGRES_PORT: "5432"
-  FLUXER_POSTGRES_DATABASE: fluxer
-  FLUXER_POSTGRES_USERNAME: fluxer
+  FLUXER_POSTGRES_HOST: ${FLUXER_POSTGRES_HOST:-postgres}
+  FLUXER_POSTGRES_PORT: "${FLUXER_POSTGRES_PORT:-5432}"
+  FLUXER_POSTGRES_DATABASE: ${FLUXER_POSTGRES_DATABASE:-fluxer}
+  FLUXER_POSTGRES_USERNAME: ${FLUXER_POSTGRES_USERNAME:-fluxer}
   FLUXER_POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD in .env}
-  FLUXER_POSTGRES_SSL: "false"
+  FLUXER_POSTGRES_SSL: "${FLUXER_POSTGRES_SSL:-false}"
   FLUXER_POSTGRES_PREPARED_STATEMENTS: ${FLUXER_POSTGRES_PREPARED_STATEMENTS:-true}
 
 x-fluxer-env: &fluxer-env
   <<: *fluxer-postgres-env
   FLUXER_ENV: production
   NODE_ENV: production
+  LOG_LEVEL: ${LOG_LEVEL:-info}
   FLUXER_SELF_HOSTED: "true"
   FLUXER_BASE_DOMAIN: ${FLUXER_DOMAIN:?set FLUXER_DOMAIN in .env}
   FLUXER_PUBLIC_SCHEME: ${FLUXER_PUBLIC_SCHEME:-https}
   FLUXER_PUBLIC_PORT: ${FLUXER_PUBLIC_PORT:-443}
-  FLUXER_TRUST_CLIENT_IP_HEADER: "true"
-  FLUXER_CLIENT_IP_HEADER_NAME: x-forwarded-for
+  FLUXER_PUBLIC_ORIGIN: ${FLUXER_PUBLIC_ORIGIN:-}
+  FLUXER_TRUST_CLIENT_IP_HEADER: "${FLUXER_TRUST_CLIENT_IP_HEADER:-true}"
+  FLUXER_CLIENT_IP_HEADER_NAME: ${FLUXER_CLIENT_IP_HEADER_NAME:-x-forwarded-for}
   FLUXER_API_HEADERS_TIMEOUT_MS: ${FLUXER_API_HEADERS_TIMEOUT_MS:-30000}
   FLUXER_API_REQUEST_TIMEOUT_MS: ${FLUXER_API_REQUEST_TIMEOUT_MS:-120000}
 
-  FLUXER_KV_URL: redis://valkey:6379/0
-  FLUXER_NATS_URL: nats://nats:4222
-  FLUXER_NATS_JETSTREAM_URL: nats://nats:4222
+  FLUXER_KV_URL: ${FLUXER_KV_URL:-redis://valkey:6379/0}
+  FLUXER_NATS_URL: ${FLUXER_NATS_URL:-nats://nats:4222}
+  FLUXER_NATS_JETSTREAM_URL: ${FLUXER_NATS_JETSTREAM_URL:-${FLUXER_NATS_URL:-nats://nats:4222}}
   FLUXER_NATS_AUTH_TOKEN: ${FLUXER_NATS_AUTH_TOKEN:-}
-  FLUXER_SVC_NATS_URL: nats://nats:4222
+  FLUXER_SVC_NATS_URL: ${FLUXER_SVC_NATS_URL:-${FLUXER_NATS_URL:-nats://nats:4222}}
   FLUXER_SVC_SHARD_COUNT: "1"
 
   FLUXER_SEARCH_ENGINE: meilisearch
-  FLUXER_SEARCH_URL: http://meilisearch:7700
+  FLUXER_SEARCH_URL: ${FLUXER_SEARCH_URL:-http://meilisearch:7700}
   FLUXER_SEARCH_API_KEY: ${MEILI_MASTER_KEY:?set MEILI_MASTER_KEY in .env}
 
-  FLUXER_S3_ENDPOINT: http://seaweedfs:8333
-  FLUXER_S3_PUBLIC_ENDPOINT: http://seaweedfs:8333
-  FLUXER_S3_REGION: us-east-1
+  FLUXER_S3_ENDPOINT: ${FLUXER_S3_ENDPOINT:-http://seaweedfs:8333}
+  FLUXER_S3_PUBLIC_ENDPOINT: ${FLUXER_S3_PUBLIC_ENDPOINT:-${FLUXER_S3_ENDPOINT:-http://seaweedfs:8333}}
+  FLUXER_S3_REGION: ${FLUXER_S3_REGION:-us-east-1}
   FLUXER_S3_ACCESS_KEY_ID: ${FLUXER_S3_ACCESS_KEY:?set FLUXER_S3_ACCESS_KEY in .env}
   FLUXER_S3_SECRET_ACCESS_KEY: ${FLUXER_S3_SECRET_KEY:?set FLUXER_S3_SECRET_KEY in .env}
-  FLUXER_S3_FORCE_PATH_STYLE: "true"
-  FLUXER_S3_BUCKET_CDN: fluxer
-  FLUXER_S3_BUCKET_UPLOADS: fluxer-uploads
-  FLUXER_S3_BUCKET_DOWNLOADS: fluxer-downloads
-  FLUXER_S3_BUCKET_REPORTS: fluxer-reports
-  FLUXER_S3_BUCKET_HARVESTS: fluxer-harvests
+  FLUXER_S3_FORCE_PATH_STYLE: "${FLUXER_S3_FORCE_PATH_STYLE:-true}"
+  FLUXER_S3_BUCKET_CDN: ${FLUXER_S3_BUCKET_CDN:-fluxer}
+  FLUXER_S3_BUCKET_UPLOADS: ${FLUXER_S3_BUCKET_UPLOADS:-fluxer-uploads}
+  FLUXER_S3_BUCKET_DOWNLOADS: ${FLUXER_S3_BUCKET_DOWNLOADS:-fluxer-downloads}
+  FLUXER_S3_BUCKET_REPORTS: ${FLUXER_S3_BUCKET_REPORTS:-fluxer-reports}
+  FLUXER_S3_BUCKET_HARVESTS: ${FLUXER_S3_BUCKET_HARVESTS:-fluxer-harvests}
   AWS_ACCESS_KEY_ID: ${FLUXER_S3_ACCESS_KEY:?set FLUXER_S3_ACCESS_KEY in .env}
   AWS_SECRET_ACCESS_KEY: ${FLUXER_S3_SECRET_KEY:?set FLUXER_S3_SECRET_KEY in .env}
-  AWS_DEFAULT_REGION: us-east-1
+  AWS_DEFAULT_REGION: ${FLUXER_S3_REGION:-us-east-1}
   AWS_EC2_METADATA_DISABLED: "true"
 
-  FLUXER_LIVEKIT_ENABLED: "true"
+  FLUXER_LIVEKIT_ENABLED: "${FLUXER_LIVEKIT_ENABLED:-true}"
   FLUXER_LIVEKIT_API_KEY: ${LIVEKIT_API_KEY:?set LIVEKIT_API_KEY in .env}
   FLUXER_LIVEKIT_API_SECRET: ${LIVEKIT_API_SECRET:?set LIVEKIT_API_SECRET in .env}
-  FLUXER_LIVEKIT_INTERNAL_URL: http://livekit:7880
+  FLUXER_LIVEKIT_INTERNAL_URL: ${FLUXER_LIVEKIT_INTERNAL_URL:-http://livekit:7880}
   FLUXER_LIVEKIT_WEBHOOK_URL: http://api:8080/webhooks/livekit
   FLUXER_LIVEKIT_DEFAULT_REGION: '{"id":"default","name":"Default","emoji":"🌍","latitude":0,"longitude":0}'
-  FLUXER_LIVEKIT_URL: ${FLUXER_LIVEKIT_URL:-${FLUXER_PUBLIC_ORIGIN:-${FLUXER_PUBLIC_SCHEME:-https}://${FLUXER_DOMAIN}}/livekit}
+  FLUXER_LIVEKIT_URL: ${FLUXER_LIVEKIT_URL:-${FLUXER_PUBLIC_ORIGIN:-${FLUXER_PUBLIC_SCHEME:-https}://${FLUXER_DOMAIN}:${FLUXER_PUBLIC_PORT:-443}}/livekit}
 
   FLUXER_KLIPY_API_KEY: ${FLUXER_KLIPY_API_KEY:-}
 
@@ -71,16 +73,16 @@ x-fluxer-env: &fluxer-env
   FLUXER_EMAIL_SMTP_PASSWORD: ${FLUXER_EMAIL_SMTP_PASSWORD:-}
   FLUXER_EMAIL_SMTP_SECURE: ${FLUXER_EMAIL_SMTP_SECURE:-true}
 
-  FLUXER_SMS_ENABLED: "false"
+  FLUXER_SMS_ENABLED: "${FLUXER_SMS_ENABLED:-false}"
   FLUXER_CAPTCHA_ENABLED: ${FLUXER_CAPTCHA_ENABLED:-false}
   FLUXER_CAPTCHA_PROVIDER: ${FLUXER_CAPTCHA_PROVIDER:-none}
   FLUXER_CAPTCHA_HCAPTCHA_SITE_KEY: ${FLUXER_CAPTCHA_HCAPTCHA_SITE_KEY:-}
   FLUXER_CAPTCHA_HCAPTCHA_SECRET_KEY: ${FLUXER_CAPTCHA_HCAPTCHA_SECRET_KEY:-}
   FLUXER_CAPTCHA_TURNSTILE_SITE_KEY: ${FLUXER_CAPTCHA_TURNSTILE_SITE_KEY:-}
   FLUXER_CAPTCHA_TURNSTILE_SECRET_KEY: ${FLUXER_CAPTCHA_TURNSTILE_SECRET_KEY:-}
-  FLUXER_STRIPE_ENABLED: "false"
-  FLUXER_NCMEC_ENABLED: "false"
-  FLUXER_CLAMAV_ENABLED: "false"
+  FLUXER_STRIPE_ENABLED: "${FLUXER_STRIPE_ENABLED:-false}"
+  FLUXER_NCMEC_ENABLED: "${FLUXER_NCMEC_ENABLED:-false}"
+  FLUXER_CLAMAV_ENABLED: "${FLUXER_CLAMAV_ENABLED:-false}"
   FLUXER_DISCOVERY_ENABLED: ${FLUXER_DISCOVERY_ENABLED:-true}
 
   FLUXER_SUDO_MODE_SECRET: ${FLUXER_SUDO_MODE_SECRET:?set FLUXER_SUDO_MODE_SECRET in .env}
@@ -132,7 +134,7 @@ services:
       - "${FLUXER_HTTPS_PORT:-443}:443"
       - "${FLUXER_HTTPS_PORT:-443}:443/udp"
     environment:
-      FLUXER_EDGE_SITE_ADDRESS: ${FLUXER_EDGE_SITE_ADDRESS:-${FLUXER_CADDY_SITE_ADDRESS:-${FLUXER_DOMAIN:?set FLUXER_DOMAIN in .env}}}
+      FLUXER_EDGE_SITE_ADDRESS: ${FLUXER_EDGE_SITE_ADDRESS:-${FLUXER_CADDY_SITE_ADDRESS:-${FLUXER_PUBLIC_SCHEME:-https}://${FLUXER_DOMAIN:?set FLUXER_DOMAIN in .env}}}
       FLUXER_EDGE_TRUSTED_PROXIES: ${FLUXER_EDGE_TRUSTED_PROXIES:-private_ranges}
     volumes:
       - ./Caddyfile:/etc/caddy/Caddyfile:ro
@@ -287,11 +289,16 @@ services:
     environment:
       FLUXER_S3_ACCESS_KEY: ${FLUXER_S3_ACCESS_KEY:?set FLUXER_S3_ACCESS_KEY in .env}
       FLUXER_S3_SECRET_KEY: ${FLUXER_S3_SECRET_KEY:?set FLUXER_S3_SECRET_KEY in .env}
+      FLUXER_S3_BUCKET_CDN: ${FLUXER_S3_BUCKET_CDN:-fluxer}
+      FLUXER_S3_BUCKET_UPLOADS: ${FLUXER_S3_BUCKET_UPLOADS:-fluxer-uploads}
+      FLUXER_S3_BUCKET_DOWNLOADS: ${FLUXER_S3_BUCKET_DOWNLOADS:-fluxer-downloads}
+      FLUXER_S3_BUCKET_REPORTS: ${FLUXER_S3_BUCKET_REPORTS:-fluxer-reports}
+      FLUXER_S3_BUCKET_HARVESTS: ${FLUXER_S3_BUCKET_HARVESTS:-fluxer-harvests}
     entrypoint:
       - /bin/sh
       - -c
       - >
-        buckets="fluxer fluxer-uploads fluxer-downloads fluxer-reports fluxer-harvests";
+        buckets="$$FLUXER_S3_BUCKET_CDN $$FLUXER_S3_BUCKET_UPLOADS $$FLUXER_S3_BUCKET_DOWNLOADS $$FLUXER_S3_BUCKET_REPORTS $$FLUXER_S3_BUCKET_HARVESTS";
         missing="$$buckets";
         for attempt in $$(seq 1 60); do
           if ! nc -z seaweedfs 9333 2>/dev/null; then
@@ -494,6 +501,10 @@ services:
     environment:
       FLUXER_APP_PROXY_HOST: 0.0.0.0
       FLUXER_APP_PROXY_PORT: "8080"
+      FLUXER_BASE_DOMAIN: ${FLUXER_DOMAIN:?set FLUXER_DOMAIN in .env}
+      FLUXER_PUBLIC_SCHEME: ${FLUXER_PUBLIC_SCHEME:-https}
+      FLUXER_PUBLIC_PORT: ${FLUXER_PUBLIC_PORT:-443}
+      FLUXER_PUBLIC_ORIGIN: ${FLUXER_PUBLIC_ORIGIN:-}
       DISCOVERY_UPSTREAM_URL: http://edge:8088/.well-known/fluxer
       PUBLIC_BOOTSTRAP_API_ENDPOINT: /api
       PUBLIC_BOOTSTRAP_API_PUBLIC_ENDPOINT: ${FLUXER_PUBLIC_ORIGIN:-${FLUXER_PUBLIC_SCHEME:-https}://${FLUXER_DOMAIN}}/api

deploy/self-hosting/tunnel.compose.yml

@@ -2,3 +2,5 @@ services:
   edge:
     ports: !override
       - "${FLUXER_HTTP_PORT:-127.0.0.1:80}:80"
+    environment:
+      FLUXER_EDGE_SITE_ADDRESS: ":80"

eslint.config.mjs

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import reactGoogleTranslate from 'eslint-plugin-react-google-translate';
+import tseslint from 'typescript-eslint';
+
+export default [
+	{
+		ignores: [
+			'**/node_modules/**',
+			'**/dist/**',
+			'**/build/**',
+			'**/coverage/**',
+			'**/*.generated.*',
+			'fluxer_app/src/features/i18n/locales/*/messages.mjs',
+		],
+	},
+	{
+		files: ['fluxer_app/src/**/*.tsx'],
+		linterOptions: {
+			reportUnusedDisableDirectives: 'error',
+		},
+		languageOptions: {
+			parser: tseslint.parser,
+			parserOptions: {
+				project: './fluxer_app/tsconfig.json',
+				tsconfigRootDir: import.meta.dirname,
+			},
+		},
+		plugins: {'react-google-translate': reactGoogleTranslate},
+		rules: {
+			'react-google-translate/no-conditional-text-nodes-with-siblings': [
+				'error',
+				{ignoreParents: ['Trans', 'Plural', 'Select', 'SelectOrdinal']},
+			],
+			'react-google-translate/no-return-text-nodes': 'error',
+		},
+	},
+];

fluxer_admin/src/config/mod.rs

@@ -129,6 +129,11 @@ impl AdminConfig {
     pub fn secure_cookies(&self) -> bool {
         self.admin_endpoint.starts_with("https://")
     }
+
+    pub fn admin_origin(&self) -> Option<String> {
+        let origin = url::Url::parse(&self.admin_endpoint).ok()?.origin();
+        origin.is_tuple().then(|| origin.ascii_serialization())
+    }
 }
 
 impl RuntimeEnv {
@@ -202,6 +207,7 @@ mod tests {
             unsafe { env::remove_var(name) };
         }
         unsafe { env::remove_var("FLUXER_PUBLIC_PORT") };
+        unsafe { env::remove_var("FLUXER_PUBLIC_ORIGIN") };
         unsafe { env::set_var("FLUXER_ADMIN_SECRET_KEY_BASE", "test-secret") };
         for (name, value) in vars {
             unsafe { env::set_var(name, value) };
@@ -350,7 +356,7 @@ mod tests {
             ("FLUXER_BASE_DOMAIN", "fluxer.example"),
             ("FLUXER_PUBLIC_PORT", "19080"),
             ("FLUXER_ADMIN_ENDPOINT", "http://fluxer.example/admin"),
-            ("FLUXER_APP_ENDPOINT", "http://fluxer.example:19080"),
+            ("FLUXER_APP_ENDPOINT", "http://fluxer.example"),
             ("FLUXER_MEDIA_ENDPOINT", "http://fluxer.example/media"),
             ("FLUXER_STATIC_CDN_ENDPOINT", "https://cdn.example.net"),
             (

fluxer_admin/src/middleware/csrf.rs

@@ -27,7 +27,6 @@ pub async fn csrf_protection(
 ) -> Response {
     let config = state.config();
     let secret = config.secret_key_base.clone();
-    let admin_endpoint = config.admin_endpoint.clone();
     let secure_cookies = config.secure_cookies();
 
     let user_id = request
@@ -50,7 +49,7 @@ pub async fn csrf_protection(
             .iter()
             .any(|suffix| path.ends_with(suffix));
         if !is_ignored {
-            if !is_same_site_request(&request, &admin_endpoint) {
+            if !is_same_site_request(&request, config.admin_origin().as_deref()) {
                 return StatusCode::FORBIDDEN.into_response();
             }
             let header_token = extract_csrf_header(&request);
@@ -167,7 +166,7 @@ async fn extract_csrf_from_form_body(
     Ok((request, token))
 }
 
-fn is_same_site_request(request: &Request, admin_endpoint: &str) -> bool {
+fn is_same_site_request(request: &Request, admin_origin: Option<&str>) -> bool {
     if let Some(site) = request
         .headers()
         .get("sec-fetch-site")
@@ -180,7 +179,7 @@ fn is_same_site_request(request: &Request, admin_endpoint: &str) -> bool {
         .get(header::ORIGIN)
         .and_then(|value| value.to_str().ok())
     {
-        Some(origin) => origin == admin_endpoint,
+        Some(origin) => admin_origin.is_some_and(|expected| origin == expected),
         None => true,
     }
 }
@@ -275,6 +274,98 @@ mod tests {
         );
     }
 
+    async fn action_status(admin_endpoint: &str, origin: &str) -> StatusCode {
+        let state = state_with_admin_endpoint(admin_endpoint);
+        let app = Router::new()
+            .route("/", get(|| async { "ok" }).post(|| async { "ok" }))
+            .layer(from_fn_with_state(state, csrf_protection));
+        let issued = app
+            .clone()
+            .oneshot(Request::builder().uri("/").body(Body::empty()).unwrap())
+            .await
+            .expect("router responds");
+        let cookie = issued
+            .headers()
+            .get_all(header::SET_COOKIE)
+            .iter()
+            .filter_map(|value| value.to_str().ok())
+            .filter_map(|value| value.split(';').next())
+            .find(|pair| pair.contains("csrf_token=") && !pair.ends_with('='))
+            .expect("a csrf cookie is issued")
+            .to_owned();
+        let token = cookie.split_once('=').expect("a cookie value").1.to_owned();
+        let response = app
+            .oneshot(
+                Request::builder()
+                    .method(Method::POST)
+                    .uri("/")
+                    .header(header::COOKIE, cookie.as_str())
+                    .header(header::ORIGIN, origin)
+                    .header(CSRF_HEADER_NAME, token.as_str())
+                    .body(Body::empty())
+                    .unwrap(),
+            )
+            .await
+            .expect("router responds");
+        response.status()
+    }
+
+    #[tokio::test]
+    async fn a_matching_origin_passes_the_same_site_check() {
+        let status = action_status(
+            "https://admin.example.test/admin",
+            "https://admin.example.test",
+        )
+        .await;
+        assert_eq!(status, StatusCode::OK);
+    }
+
+    #[tokio::test]
+    async fn a_matching_origin_on_a_non_default_port_passes_the_same_site_check() {
+        let status = action_status(
+            "https://admin.example.test:19080/admin",
+            "https://admin.example.test:19080",
+        )
+        .await;
+        assert_eq!(status, StatusCode::OK);
+    }
+
+    #[tokio::test]
+    async fn a_foreign_origin_fails_the_same_site_check() {
+        let status = action_status(
+            "https://admin.example.test:19080/admin",
+            "https://evil.example.test:19080",
+        )
+        .await;
+        assert_eq!(status, StatusCode::FORBIDDEN);
+    }
+
+    #[tokio::test]
+    async fn another_port_on_the_admin_host_fails_the_same_site_check() {
+        let status = action_status(
+            "https://admin.example.test:19080/admin",
+            "https://admin.example.test",
+        )
+        .await;
+        assert_eq!(status, StatusCode::FORBIDDEN);
+    }
+
+    #[tokio::test]
+    async fn an_unparseable_admin_endpoint_fails_closed() {
+        let status = action_status("not-an-endpoint", "https://admin.example.test").await;
+        assert_eq!(status, StatusCode::FORBIDDEN);
+    }
+
+    #[tokio::test]
+    async fn an_explicit_default_port_matches_a_portless_origin() {
+        let status = action_status(
+            "https://admin.example.test:443/admin",
+            "https://admin.example.test",
+        )
+        .await;
+        assert_eq!(status, StatusCode::OK);
+    }
+
     #[test]
     fn oauth2_callback_is_exempt() {
         let exempt = IGNORED_PATH_SUFFIXES

fluxer_admin/src/templates/pages/user_detail_tabs/overview.rs

@@ -560,6 +560,8 @@ fn traits_form(
     }
 }
 
+const DERIVED_TRAITS: [&str; 1] = ["premium"];
+
 fn parse_trait_definitions(limit_config: Option<&LimitConfigResponse>) -> Vec<&str> {
     limit_config
         .map(|response| {
@@ -569,6 +571,7 @@ fn parse_trait_definitions(limit_config: Option<&LimitConfigResponse>) -> Vec<&s
                 .iter()
                 .map(|value| value.trim())
                 .filter(|value| !value.is_empty())
+                .filter(|value| !DERIVED_TRAITS.contains(value))
                 .collect()
         })
         .unwrap_or_default()
@@ -579,5 +582,6 @@ fn custom_traits<'a>(user: &'a AdminUser, trait_definitions: &[&str]) -> Vec<&'a
         .iter()
         .map(String::as_str)
         .filter(|trait_name| !trait_definitions.contains(trait_name))
+        .filter(|trait_name| !DERIVED_TRAITS.contains(trait_name))
         .collect()
 }

fluxer_admin/tests/csrf_legacy_cookie.rs

@@ -18,6 +18,7 @@ use tower::ServiceExt;
 const SECRET_KEY: &str = "legacy-csrf-cookie-test-secret";
 const ADMIN_ORIGIN: &str = "https://admin.example.test";
 const LEGACY_HEX_TOKEN: &str = "8f14e45fceea167a5a36dedd4bea25438f14e45fceea167a5a36dedd4bea2543";
+const CREATED_KEY_SECRET: &str = "fa_1900000000000000001_OneTimeSecretForTests";
 
 struct TestApp {
     router: Router,
@@ -128,6 +129,10 @@ async fn load_page(app: &TestApp, cookie: &str) -> (String, String) {
     let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
     let text = String::from_utf8(body.to_vec()).unwrap();
     assert_eq!(status, StatusCode::OK, "{text}");
+    assert!(
+        text.contains("AdminUser"),
+        "the page did not render the admin the mock API returns"
+    );
     let cookie_token = host_csrf_cookie(&headers)
         .unwrap_or_else(|| panic!("no __Host-csrf_token in Set-Cookie: {headers:?}"));
     let page_token = form_csrf_value(&text).expect("no _csrf hidden input rendered");
@@ -166,7 +171,16 @@ async fn submit_action(app: &TestApp, cookie: &str, form_token: &str) -> StatusC
         )
         .await
         .unwrap();
-    response.status()
+    let status = response.status();
+    let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
+    let text = String::from_utf8(body.to_vec()).unwrap();
+    if status == StatusCode::OK {
+        assert!(
+            text.contains(CREATED_KEY_SECRET),
+            "the action did not render the key the mock API creates"
+        );
+    }
+    status
 }
 
 fn host_csrf_cookie(headers: &HeaderMap) -> Option<String> {
@@ -207,11 +221,11 @@ async fn spawn_mock_api() -> String {
 
 async fn mock_api(method: Method, uri: Uri) -> Response {
     match (method, uri.path()) {
-        (Method::GET, "/admin/users/me") => Json(json!({ "user": admin_user() })).into_response(),
+        (Method::GET, "/admin/users/@me") => Json(json!({ "user": admin_user() })).into_response(),
         (Method::GET, "/admin/api-keys") => Json(json!([])).into_response(),
         (Method::POST, "/admin/api-keys") => Json(json!({
             "key_id": "1900000000000000001",
-            "key": "fa_1900000000000000001_OneTimeSecretForTests",
+            "key": CREATED_KEY_SECRET,
             "name": "Legacy Cookie Key",
             "created_at": "2026-07-10T15:00:00.000Z",
             "expires_at": null,

fluxer_api/src/api/Config.test.ts

@@ -81,6 +81,22 @@ function withUploadRelaySecret(master: MasterConfig, secretBase64: string): Mast
 	};
 }
 
+function withStripeLegacyPrices(
+	master: MasterConfig,
+	legacyPrices: Record<string, Array<string> | undefined> | undefined,
+): MasterConfig {
+	return {
+		...master,
+		integrations: {
+			...master.integrations,
+			stripe: {
+				...master.integrations.stripe,
+				legacy_prices: legacyPrices,
+			},
+		},
+	};
+}
+
 describe('buildAPIConfigFromMaster upload relay secret', () => {
 	let master: MasterConfig;
 	beforeAll(async () => {
@@ -111,3 +127,42 @@ describe('buildAPIConfigFromMaster upload relay secret', () => {
 		);
 	});
 });
+
+describe('buildAPIConfigFromMaster stripe legacy prices', () => {
+	let master: MasterConfig;
+	beforeAll(async () => {
+		master = await loadConfig();
+	});
+
+	it('carries the retired stripe price map from master config onto the api config', () => {
+		const legacyPrices = {
+			monthly_brl: ['price_retired_monthly_brl'],
+			yearly_brl: ['price_retired_yearly_brl_a', 'price_retired_yearly_brl_b'],
+			monthly_try: ['price_1TMYpdFPC94Os7FdZVRx98Up'],
+		};
+		expect(buildAPIConfigFromMaster(withStripeLegacyPrices(master, legacyPrices)).stripe.legacyPrices).toEqual(
+			legacyPrices,
+		);
+	});
+
+	it('carries the retired price map even when no live prices are configured', () => {
+		const withoutPrices: MasterConfig = {
+			...master,
+			integrations: {
+				...master.integrations,
+				stripe: {
+					...master.integrations.stripe,
+					prices: undefined,
+					legacy_prices: {monthly_try: ['price_1TMYpdFPC94Os7FdZVRx98Up']},
+				},
+			},
+		};
+		const config = buildAPIConfigFromMaster(withoutPrices);
+		expect(config.stripe.prices).toBeUndefined();
+		expect(config.stripe.legacyPrices).toEqual({monthly_try: ['price_1TMYpdFPC94Os7FdZVRx98Up']});
+	});
+
+	it('leaves the retired price map undefined when master config does not set one', () => {
+		expect(buildAPIConfigFromMaster(withStripeLegacyPrices(master, undefined)).stripe.legacyPrices).toBeUndefined();
+	});
+});

fluxer_api/src/api/Config.ts

@@ -395,6 +395,7 @@ export function buildAPIConfigFromMaster(master: MasterConfig): APIConfig {
 						gift1YearTry: master.integrations.stripe.prices.gift_1_year_try,
 					}
 				: undefined,
+			legacyPrices: master.integrations.stripe.legacy_prices,
 		},
 		bunny: {
 			purgeEnabled: master.integrations.bunny.purge_enabled,

fluxer_api/src/api/admin/services/AdminBanManagementService.ts

@@ -30,8 +30,8 @@ import {phraseBlocklistCache} from '../../middleware/PhraseBlocklistCache';
 import {profileSubstringBlocklistCache} from '../../middleware/ProfileSubstringBlocklistCache';
 import {urlBlocklistCache} from '../../middleware/UrlBlocklistCache';
 import {
+	getIpBanBlastRadiusVerdict,
 	getSuspiciousIpSkipReason,
-	hasHighCgnatBlastRadiusRisk,
 	isSingleIpBanCandidate,
 } from '../../risk/IpBanCgnatGuard';
 import {isIpBanExempt} from '../../risk/IpBanExemptions';
@@ -292,7 +292,7 @@ export class AdminBanManagementService {
 			return false;
 		}
 		try {
-			const highRisk = await hasHighCgnatBlastRadiusRisk(ip, this.deps.ipInfoService, {
+			const {cgnat: highRisk} = await getIpBanBlastRadiusVerdict(ip, this.deps.ipInfoService, {
 				source: 'admin.ip_ban',
 				reason: 'pre_write_cgnat_guard',
 			});

fluxer_api/src/api/admin/services/AdminUserSecurityService.ts

@@ -45,6 +45,7 @@ import {Logger} from '../../Logger';
 import {getInstanceConfigRepository} from '../../middleware/ServiceSingletons';
 import type {IRiskHistoryRepository} from '../../risk/HistoricalOutcomeRepository';
 import type {HistoricalOutcomeCode} from '../../risk/RiskHistoryTypes';
+import {resolveAssignedTraits} from '../../user/UserTraits';
 import {getIpAddressReverse, getLocationLabelFromIp} from '../../utils/IpUtils';
 import {resolveSessionClientInfo} from '../../utils/SessionClientIdentity';
 import {mapUserToAdminResponse} from '../models/UserTypes';
@@ -383,7 +384,8 @@ export class AdminUserSecurityService {
 		if (!user) {
 			throw new UnknownUserError();
 		}
-		const traitSet = data.traits.length > 0 ? new Set(data.traits) : null;
+		const assigned = resolveAssignedTraits(user.traits ?? [], data.traits);
+		const traitSet = assigned.size > 0 ? assigned : null;
 		const updatedUser = await userRepository.patchUpsert(
 			userId,
 			{

fluxer_api/src/api/auth/AuthPassword.ts

@@ -209,7 +209,7 @@ export async function forgotPassword(ctx: ApiContext, {data, request}: ForgotPas
 	}
 	const hasValidDns = await emailDnsValidation.hasValidDnsRecords(data.email);
 	if (!hasValidDns) {
-		throw InputValidationError.fromCode('email', ValidationErrorCodes.INVALID_EMAIL_ADDRESS);
+		throw InputValidationError.fromCode('email', ValidationErrorCodes.EMAIL_DOMAIN_CANNOT_RECEIVE_MAIL);
 	}
 	const user = await users.findByEmail(data.email);
 	if (!user) {

fluxer_api/src/api/auth/AuthRegistration.ts

@@ -187,7 +187,7 @@ export async function register(
 		contactDomain = normalizePolicyContactDomain(extractEmailDomain(rawEmail));
 		const hasValidDns = await emailDnsValidation.hasValidDnsRecords(rawEmail);
 		if (!hasValidDns) {
-			throw InputValidationError.fromCode('email', ValidationErrorCodes.INVALID_EMAIL_ADDRESS);
+			throw InputValidationError.fromCode('email', ValidationErrorCodes.EMAIL_DOMAIN_CANNOT_RECEIVE_MAIL);
 		}
 		contactDomainBlocked = accountPolicyEvaluator.isBlockedRegistrationEmailDomain(contactDomain);
 		if (contactDomainBlocked) {

fluxer_api/src/api/channel/services/message/MessageHelpers.ts

@@ -308,7 +308,7 @@ export async function createMessageSnapshotsForForward(
 	return [new MessageSnapshotModel(snapshotData)];
 }
 
-function collectEmbedReferencedAttachmentCdnKeys(message: Message): Array<string> {
+function collectEmbedReferencedAttachmentCdnKeys(message: Message, ownKeys: ReadonlySet<string>): Array<string> {
 	const mediaPrefix = `${Config.endpoints.media}/`;
 	const keys = new Set<string>();
 	const consider = (url: string | null | undefined): void => {
@@ -316,7 +316,7 @@ function collectEmbedReferencedAttachmentCdnKeys(message: Message): Array<string
 			return;
 		}
 		const key = url.slice(mediaPrefix.length);
-		if (key.startsWith('attachments/')) {
+		if (ownKeys.has(key)) {
 			keys.add(key);
 		}
 	};
@@ -342,6 +342,11 @@ export async function purgeMessageAttachments(
 ): Promise<void> {
 	const cdnKeys = new Set<string>();
 	const cdnUrls: Array<string> = [];
+	const ownedCdnKeys = new Set<string>(
+		collectMessageAttachments(message).map((attachment) =>
+			makeAttachmentCdnKey(message.channelId, attachment.id, attachment.filename),
+		),
+	);
 	for (const attachment of collectMessageAttachments(message)) {
 		const cdnKey = makeAttachmentCdnKey(message.channelId, attachment.id, attachment.filename);
 		if (cdnKeys.has(cdnKey)) {
@@ -352,7 +357,7 @@ export async function purgeMessageAttachments(
 			cdnUrls.push(makeAttachmentCdnUrl(message.channelId, attachment.id, attachment.filename));
 		}
 	}
-	for (const embedKey of collectEmbedReferencedAttachmentCdnKeys(message)) {
+	for (const embedKey of collectEmbedReferencedAttachmentCdnKeys(message, ownedCdnKeys)) {
 		if (cdnKeys.has(embedKey)) {
 			continue;
 		}

fluxer_api/src/api/config/APIConfig.ts

@@ -248,6 +248,7 @@ export interface APIConfig {
 			gift1YearPln?: string;
 			gift1YearTry?: string;
 		};
+		legacyPrices?: Record<string, Array<string> | undefined>;
 	};
 	bunny: {
 		purgeEnabled: boolean;

fluxer_api/src/api/donation/services/DonationCheckoutService.ts

@@ -40,7 +40,7 @@ export class DonationCheckoutService {
 		}
 		const hasValidDns = await this.emailDnsValidationService.hasValidDnsRecords(params.email);
 		if (!hasValidDns) {
-			throw InputValidationError.fromCode('email', ValidationErrorCodes.INVALID_EMAIL_ADDRESS);
+			throw InputValidationError.fromCode('email', ValidationErrorCodes.EMAIL_DOMAIN_CANNOT_RECEIVE_MAIL);
 		}
 		const isRecurring = params.interval !== null;
 		const existingDonor = await this.donationRepository.findDonorByEmail(params.email);

fluxer_api/src/api/donation/services/DonationMagicLinkService.ts

@@ -24,7 +24,7 @@ export class DonationMagicLinkService {
 	async sendMagicLink(email: string): Promise<void> {
 		const hasValidDns = await this.emailDnsValidationService.hasValidDnsRecords(email);
 		if (!hasValidDns) {
-			throw InputValidationError.fromCode('email', ValidationErrorCodes.INVALID_EMAIL_ADDRESS);
+			throw InputValidationError.fromCode('email', ValidationErrorCodes.EMAIL_DOMAIN_CANNOT_RECEIVE_MAIL);
 		}
 		const donor = await this.donationRepository.findDonorByEmail(email);
 		if (!donor) {

fluxer_api/src/api/guild/services/GuildModerationService.ts

@@ -19,7 +19,7 @@ import type {UserCacheService} from '../../infrastructure/UserCacheService';
 import {Logger} from '../../Logger';
 import type {RequestCache} from '../../middleware/RequestCacheMiddleware';
 import type {GuildBan} from '../../models/GuildBan';
-import {hasHighCgnatBlastRadiusRisk, isSingleIpBanCandidate} from '../../risk/IpBanCgnatGuard';
+import {getIpBanBlastRadiusVerdict, isSingleIpBanCandidate} from '../../risk/IpBanCgnatGuard';
 import {isIpBanExempt} from '../../risk/IpBanExemptions';
 import type {IUserRepository} from '../../user/IUserRepository';
 import type {WorkerTaskName} from '../../worker/WorkerLaneConfig';
@@ -237,19 +237,20 @@ export class GuildModerationService {
 			return true;
 		}
 		try {
-			const highRisk = await hasHighCgnatBlastRadiusRisk(userIp, this.ipInfoService, {
+			const {cgnat, sharedAccess} = await getIpBanBlastRadiusVerdict(userIp, this.ipInfoService, {
 				source: 'guild.ip_ban',
 				reason: 'join_cgnat_guard',
 			});
+			const highRisk = cgnat || sharedAccess;
 			if (highRisk) {
 				Logger.warn(
 					{userIp, bannedIp},
-					'Skipping guild IP ban match because IPInfo indicates high CGNAT blast-radius risk',
+					'Skipping guild IP ban match because IPInfo indicates high shared-network blast-radius risk',
 				);
 			}
 			return !highRisk;
 		} catch (error) {
-			Logger.warn({error, userIp, bannedIp}, 'IPInfo CGNAT guard failed while checking guild IP ban');
+			Logger.warn({error, userIp, bannedIp}, 'IPInfo blast-radius guard failed while checking guild IP ban');
 			return true;
 		}
 	}

fluxer_api/src/api/guild/services/member/GuildMemberValidationService.ts

@@ -14,7 +14,7 @@ import type {GuildID, RoleID, UserID} from '../../../BrandedTypes';
 import {guildIdToRoleId} from '../../../BrandedTypes';
 import {Logger} from '../../../Logger';
 import type {GuildMember} from '../../../models/GuildMember';
-import {hasHighCgnatBlastRadiusRisk, isSingleIpBanCandidate} from '../../../risk/IpBanCgnatGuard';
+import {getIpBanBlastRadiusVerdict, isSingleIpBanCandidate} from '../../../risk/IpBanCgnatGuard';
 import {isIpBanExempt} from '../../../risk/IpBanExemptions';
 import type {IUserRepository} from '../../../user/IUserRepository';
 import type {IGuildRepositoryAggregate} from '../../repositories/IGuildRepositoryAggregate';
@@ -119,14 +119,15 @@ export class GuildMemberValidationService {
 			return true;
 		}
 		try {
-			const highRisk = await hasHighCgnatBlastRadiusRisk(userIp, this.ipInfoService, {
+			const {cgnat, sharedAccess} = await getIpBanBlastRadiusVerdict(userIp, this.ipInfoService, {
 				source: 'guild.member_ip_ban',
 				reason: 'join_cgnat_guard',
 			});
+			const highRisk = cgnat || sharedAccess;
 			if (highRisk) {
 				Logger.warn(
 					{userIp, bannedIp},
-					'Skipping guild member IP ban match because IPInfo indicates high CGNAT blast-radius risk',
+					'Skipping guild member IP ban match because IPInfo indicates high shared-network blast-radius risk',
 				);
 			}
 			return !highRisk;

fluxer_api/src/api/infrastructure/EmailDnsValidationService.ts

@@ -27,25 +27,51 @@ interface EmailDnsValidationServiceOptions {
 	enforceInTestMode?: boolean;
 	positiveTtlMs?: number;
 	negativeTtlMs?: number;
+	lookupTimeoutMs?: number;
+	maxCachedDomains?: number;
+	isEmailEnabled?: () => Promise<boolean>;
 }
 
 type DnsResolutionResult = 'valid' | 'invalid' | 'fallback' | 'transient_error';
+type DomainVerdict = 'valid' | 'invalid' | 'unverified';
 
 const DOMAIN_NOT_FOUND_CODES = new Set(['ENOTFOUND', 'ENONAME', 'EAI_NONAME', 'NXDOMAIN']);
 const DOMAIN_NO_RECORD_CODES = new Set(['ENODATA', 'ENOENT', 'NODATA']);
+const DNS_LOOKUP_TIMEOUT_MS = 2000;
+const DNS_LOOKUP_TRIES = 1;
+const MAX_CACHED_DOMAINS = 10000;
+
+async function isInstanceEmailEnabled(): Promise<boolean> {
+	const {getInstanceConfigRepository} = await import('../middleware/ServiceSingletons');
+	return getInstanceConfigRepository().isEmailEnabled();
+}
+
+function createLookupTimeoutError(): NodeJS.ErrnoException {
+	const error: NodeJS.ErrnoException = new Error('Email DNS lookup timed out');
+	error.code = 'ETIMEOUT';
+	return error;
+}
 
 export class EmailDnsValidationService implements IEmailDnsValidationService {
 	private readonly resolver: IDnsResolver;
 	private readonly enforceInTestMode: boolean;
 	private readonly positiveTtlMs: number;
 	private readonly negativeTtlMs: number;
+	private readonly lookupTimeoutMs: number;
+	private readonly maxCachedDomains: number;
+	private readonly isEmailEnabled: () => Promise<boolean>;
 	private readonly domainCache = new Map<string, DomainValidationCacheEntry>();
 
 	constructor(options: EmailDnsValidationServiceOptions = {}) {
-		this.resolver = options.resolver ?? new Resolver();
+		this.lookupTimeoutMs = options.lookupTimeoutMs ?? DNS_LOOKUP_TIMEOUT_MS;
+		this.resolver =
+			options.resolver ??
+			new Resolver({timeout: this.lookupTimeoutMs, tries: DNS_LOOKUP_TRIES, maxTimeout: this.lookupTimeoutMs});
 		this.enforceInTestMode = options.enforceInTestMode ?? false;
 		this.positiveTtlMs = options.positiveTtlMs ?? ms('30 minutes');
 		this.negativeTtlMs = options.negativeTtlMs ?? ms('5 minutes');
+		this.maxCachedDomains = options.maxCachedDomains ?? MAX_CACHED_DOMAINS;
+		this.isEmailEnabled = options.isEmailEnabled ?? isInstanceEmailEnabled;
 	}
 
 	async hasValidDnsRecords(email: string): Promise<boolean> {
@@ -56,13 +82,19 @@ export class EmailDnsValidationService implements IEmailDnsValidationService {
 		if (!domain) {
 			return false;
 		}
+		if (!(await this.isEmailEnabled())) {
+			return true;
+		}
 		const cached = this.getCachedDomainResult(domain);
 		if (cached !== null) {
 			return cached;
 		}
-		const isValid = await this.resolveDomain(domain);
-		this.setCachedDomainResult(domain, isValid);
-		return isValid;
+		const verdict = await this.resolveDomain(domain);
+		if (verdict === 'invalid') {
+			Logger.warn({domain}, 'Email domain publishes no mail exchange or address records, rejecting the address');
+		}
+		this.setCachedDomainResult(domain, verdict);
+		return verdict !== 'invalid';
 	}
 
 	private extractDomain(email: string): string | null {
@@ -82,41 +114,49 @@ export class EmailDnsValidationService implements IEmailDnsValidationService {
 			this.domainCache.delete(domain);
 			return null;
 		}
+		this.domainCache.delete(domain);
+		this.domainCache.set(domain, cached);
 		return cached.valid;
 	}
 
-	private setCachedDomainResult(domain: string, isValid: boolean): void {
-		const ttlMs = isValid ? this.positiveTtlMs : this.negativeTtlMs;
+	private setCachedDomainResult(domain: string, verdict: DomainVerdict): void {
+		const ttlMs = verdict === 'valid' ? this.positiveTtlMs : this.negativeTtlMs;
+		if (this.domainCache.size >= this.maxCachedDomains && !this.domainCache.has(domain)) {
+			const oldestDomain = this.domainCache.keys().next().value;
+			if (oldestDomain !== undefined) {
+				this.domainCache.delete(oldestDomain);
+			}
+		}
 		this.domainCache.set(domain, {
-			valid: isValid,
+			valid: verdict !== 'invalid',
 			expiresAtMs: Date.now() + ttlMs,
 		});
 	}
 
-	private async resolveDomain(domain: string): Promise<boolean> {
+	private async resolveDomain(domain: string): Promise<DomainVerdict> {
 		const mxResult = await this.resolveMx(domain);
 		if (mxResult === 'valid') {
-			return true;
+			return 'valid';
 		}
 		if (mxResult === 'invalid') {
-			return false;
+			return 'invalid';
 		}
 		if (mxResult === 'transient_error') {
-			return true;
+			return 'unverified';
 		}
 		const addressResult = await this.resolveAddressRecords(domain);
 		if (addressResult === 'valid') {
-			return true;
+			return 'valid';
 		}
 		if (addressResult === 'invalid') {
-			return false;
+			return 'invalid';
 		}
-		return true;
+		return 'unverified';
 	}
 
 	private async resolveMx(domain: string): Promise<DnsResolutionResult> {
 		try {
-			const records = await this.resolver.resolveMx(domain);
+			const records = await this.withLookupDeadline(this.resolver.resolveMx(domain));
 			if (records.length > 0) {
 				return 'valid';
 			}
@@ -128,8 +168,8 @@ export class EmailDnsValidationService implements IEmailDnsValidationService {
 
 	private async resolveAddressRecords(domain: string): Promise<DnsResolutionResult> {
 		const [ipv4Result, ipv6Result] = await Promise.allSettled([
-			this.resolver.resolve4(domain),
-			this.resolver.resolve6(domain),
+			this.withLookupDeadline(this.resolver.resolve4(domain)),
+			this.withLookupDeadline(this.resolver.resolve6(domain)),
 		]);
 		if (ipv4Result.status === 'fulfilled' && ipv4Result.value.length > 0) {
 			return 'valid';
@@ -147,6 +187,20 @@ export class EmailDnsValidationService implements IEmailDnsValidationService {
 		return 'invalid';
 	}
 
+	private async withLookupDeadline<T>(lookup: Promise<T>): Promise<T> {
+		let timer: ReturnType<typeof setTimeout> | undefined;
+		try {
+			return await Promise.race([
+				lookup,
+				new Promise<never>((_resolve, reject) => {
+					timer = setTimeout(() => reject(createLookupTimeoutError()), this.lookupTimeoutMs);
+				}),
+			]);
+		} finally {
+			clearTimeout(timer);
+		}
+	}
+
 	private classifyResolverError(
 		error: unknown,
 		domain: string,

fluxer_api/src/api/infrastructure/StorageService.test.ts

@@ -143,6 +143,32 @@ describe('StorageService.getPresignedUploadURL', () => {
 			},
 		);
 	});
+
+	it('gives both clients the configured addressing rather than pinning one to path style', async () => {
+		await withS3Config(
+			{
+				endpoint: 'https://s3.example.test',
+				presignedUrlBase: '',
+				forcePathStyle: false,
+				region: 'eu-central-1',
+				accessKeyId: 'fluxer',
+				secretAccessKey: 'fluxer-secret',
+				buckets: {uploads: 'fluxer-uploads'},
+			},
+			async () => {
+				const service = new StorageService();
+				const probe = service as unknown as {
+					client: {config: {forcePathStyle?: unknown}};
+					presignClient: {config: {forcePathStyle?: unknown}};
+				};
+				const resolve = async (value: unknown): Promise<unknown> =>
+					typeof value === 'function' ? await (value as () => Promise<unknown>)() : value;
+
+				expect(await resolve(probe.client.config.forcePathStyle)).toBe(false);
+				expect(await resolve(probe.presignClient.config.forcePathStyle)).toBe(false);
+			},
+		);
+	});
 });
 
 describe('StorageService.copyObjectWithMetadataStripping', () => {

fluxer_api/src/api/infrastructure/StorageService.ts

@@ -127,7 +127,7 @@ export class StorageService implements IStorageService {
 			region: this.provider.region,
 			accessKeyId: this.provider.accessKeyId,
 			secretAccessKey: this.provider.secretAccessKey,
-			forcePathStyle: true,
+			forcePathStyle: this.provider.forcePathStyle,
 		});
 		this.presignClient = buildPooledS3Client({
 			endpoint: this.resolvePresignEndpoint(),
@@ -136,6 +136,15 @@ export class StorageService implements IStorageService {
 			secretAccessKey: this.provider.secretAccessKey,
 			forcePathStyle: this.provider.forcePathStyle,
 		});
+		Logger.info(
+			{
+				endpoint: this.provider.endpoint,
+				presignEndpoint: this.resolvePresignEndpoint(),
+				region: this.provider.region,
+				addressing: this.provider.forcePathStyle ? 'path' : 'virtual-host',
+			},
+			'Object storage client ready',
+		);
 	}
 
 	private resolvePresignEndpoint(): string {

fluxer_api/src/api/infrastructure/tests/EmailDnsValidationService.test.ts

@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {ms} from 'itty-time';
+import {describe, expect, it} from 'vitest';
+import {Config} from '../../Config';
+import {getInstanceConfigRepository} from '../../middleware/ServiceSingletons';
+import {EmailDnsValidationService} from '../EmailDnsValidationService';
+
+interface MxRecord {
+	exchange: string;
+	priority: number;
+}
+
+function dnsError(code: string): NodeJS.ErrnoException {
+	const error: NodeJS.ErrnoException = new Error(`dns lookup failed with ${code}`);
+	error.code = code;
+	return error;
+}
+
+class FakeDnsResolver {
+	readonly lookups: Array<string> = [];
+	mxRecords: Array<MxRecord> = [{exchange: 'mx.example.com', priority: 10}];
+	mxErrorCode: string | null = null;
+	addressErrorCode: string | null = 'ENOTFOUND';
+	addresses: Array<string> = [];
+	stall = false;
+
+	async resolveMx(domain: string): Promise<Array<MxRecord>> {
+		this.lookups.push(`mx:${domain}`);
+		if (this.stall) {
+			return new Promise<Array<MxRecord>>(() => {});
+		}
+		if (this.mxErrorCode) {
+			throw dnsError(this.mxErrorCode);
+		}
+		return this.mxRecords;
+	}
+
+	async resolve4(domain: string): Promise<Array<string>> {
+		this.lookups.push(`a:${domain}`);
+		if (this.addressErrorCode) {
+			throw dnsError(this.addressErrorCode);
+		}
+		return this.addresses;
+	}
+
+	async resolve6(domain: string): Promise<Array<string>> {
+		this.lookups.push(`aaaa:${domain}`);
+		if (this.addressErrorCode) {
+			throw dnsError(this.addressErrorCode);
+		}
+		return this.addresses;
+	}
+}
+
+describe('EmailDnsValidationService', () => {
+	it('skips the lookup when the instance sends no mail', async () => {
+		const resolver = new FakeDnsResolver();
+		resolver.mxErrorCode = 'ENOTFOUND';
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => false,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(resolver.lookups).toEqual([]);
+	});
+
+	it('looks the domain up when the instance sends mail', async () => {
+		const resolver = new FakeDnsResolver();
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(resolver.lookups).toEqual(['mx:gmail.com']);
+	});
+
+	it('follows the env email flag when no gate is supplied and the operator set nothing', async () => {
+		expect(Config.email.enabled).toBe(true);
+		const resolver = new FakeDnsResolver();
+		const service = new EmailDnsValidationService({resolver, enforceInTestMode: true});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(resolver.lookups).toEqual(['mx:gmail.com']);
+	});
+
+	it('follows the runtime instance email setting over the env flag', async () => {
+		expect(Config.email.enabled).toBe(true);
+		await getInstanceConfigRepository().setInstanceIntegrationsConfig({email: {enabled: false}});
+		const resolver = new FakeDnsResolver();
+		resolver.mxErrorCode = 'ENOTFOUND';
+		const service = new EmailDnsValidationService({resolver, enforceInTestMode: true});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(resolver.lookups).toEqual([]);
+	});
+
+	it('still rejects a syntactically broken address when the instance sends no mail', async () => {
+		const resolver = new FakeDnsResolver();
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => false,
+		});
+		expect(await service.hasValidDnsRecords('probe@')).toBe(false);
+		expect(resolver.lookups).toEqual([]);
+	});
+
+	it('rejects a domain that does not exist', async () => {
+		const resolver = new FakeDnsResolver();
+		resolver.mxErrorCode = 'ENOTFOUND';
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(false);
+		expect(resolver.lookups).toEqual(['mx:asdf.asdf']);
+	});
+
+	it('accepts a domain that publishes address records but no mail records', async () => {
+		const resolver = new FakeDnsResolver();
+		resolver.mxErrorCode = 'ENODATA';
+		resolver.addressErrorCode = null;
+		resolver.addresses = ['198.51.100.10'];
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(resolver.lookups).toEqual(['mx:mail-less.test', 'a:mail-less.test', 'aaaa:mail-less.test']);
+	});
+
+	it('rejects a domain that publishes neither mail nor address records', async () => {
+		const resolver = new FakeDnsResolver();
+		resolver.mxErrorCode = 'ENODATA';
+		resolver.addressErrorCode = 'ENODATA';
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(false);
+		expect(resolver.lookups).toEqual(['mx:no-records.test', 'a:no-records.test', 'aaaa:no-records.test']);
+	});
+
+	it('allows the address when the resolver fails transiently', async () => {
+		const resolver = new FakeDnsResolver();
+		resolver.mxErrorCode = 'ESERVFAIL';
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+	});
+
+	it('does not cache a transient failure as a verified domain', async () => {
+		const resolver = new FakeDnsResolver();
+		resolver.mxErrorCode = 'ESERVFAIL';
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+			positiveTtlMs: ms('30 minutes'),
+			negativeTtlMs: 0,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(resolver.lookups).toEqual(['mx:asdf.asdf', 'mx:asdf.asdf']);
+	});
+
+	it('caches a verified domain for the positive ttl', async () => {
+		const resolver = new FakeDnsResolver();
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+			positiveTtlMs: ms('30 minutes'),
+			negativeTtlMs: 0,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(resolver.lookups).toEqual(['mx:gmail.com']);
+	});
+
+	it('gives up on a stalled resolver instead of hanging', async () => {
+		const resolver = new FakeDnsResolver();
+		resolver.stall = true;
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+			lookupTimeoutMs: 10,
+		});
+		const startedAtMs = Date.now();
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(true);
+		expect(Date.now() - startedAtMs).toBeLessThan(ms('5 seconds'));
+		expect(resolver.lookups).toEqual(['mx:stalled.test']);
+	});
+
+	it('bounds the domain cache', async () => {
+		const resolver = new FakeDnsResolver();
+		resolver.mxErrorCode = 'ENOTFOUND';
+		const service = new EmailDnsValidationService({
+			resolver,
+			enforceInTestMode: true,
+			isEmailEnabled: async () => true,
+			maxCachedDomains: 2,
+		});
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(false);
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(false);
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(false);
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(false);
+		expect(resolver.lookups).toEqual(['mx:first.test', 'mx:second.test', 'mx:third.test']);
+		expect(await service.hasValidDnsRecords('[email protected]')).toBe(false);
+		expect(resolver.lookups).toEqual(['mx:first.test', 'mx:second.test', 'mx:third.test', 'mx:first.test']);
+	});
+});

fluxer_api/src/api/openapi/openapi.json

@@ -13628,6 +13628,73 @@
 				]
 			}
 		},
+		"/premium/switch-to-list-price": {
+			"post": {
+				"operationId": "switch_subscription_to_list_price",
+				"summary": "Switch subscription to the current list price",
+				"tags": ["Premium"],
+				"responses": {
+					"200": {
+						"description": "Success",
+						"content": {"application/json": {"schema": {"$ref": "#/components/schemas/SwitchToListPriceResponse"}}}
+					},
+					"400": {
+						"description": "Bad Request - The request was malformed or contained invalid data",
+						"content": {"application/json": {"schema": {"$ref": "#/components/schemas/Error"}}}
+					},
+					"401": {
+						"description": "Unauthorized - Authentication is required or the token is invalid",
+						"content": {"application/json": {"schema": {"$ref": "#/components/schemas/Error"}}}
+					},
+					"403": {
+						"description": "Forbidden - You do not have permission to perform this action",
+						"content": {"application/json": {"schema": {"$ref": "#/components/schemas/Error"}}}
+					},
+					"429": {
+						"description": "Too Many Requests - You are being rate limited",
+						"content": {
+							"application/json": {
+								"schema": {
+									"type": "object",
+									"properties": {
+										"code": {"type": "string", "enum": ["RATE_LIMITED"]},
+										"message": {"type": "string"},
+										"retry_after": {"type": "number", "description": "Seconds to wait before retrying"},
+										"global": {"type": "boolean", "description": "Whether this is a global rate limit"}
+									},
+									"required": ["code", "message", "retry_after"]
+								}
+							}
+						},
+						"headers": {
+							"Retry-After": {
+								"description": "Number of seconds to wait before retrying (only on 429)",
+								"schema": {"type": "integer"}
+							},
+							"X-RateLimit-Limit": {
+								"description": "The number of requests that can be made in the current window",
+								"schema": {"type": "integer"}
+							},
+							"X-RateLimit-Remaining": {
+								"description": "The number of remaining requests that can be made",
+								"schema": {"type": "integer"}
+							},
+							"X-RateLimit-Reset": {
+								"description": "Unix timestamp when the rate limit resets",
+								"schema": {"type": "integer"}
+							}
+						}
+					},
+					"500": {
+						"description": "Internal Server Error - An unexpected error occurred",
+						"content": {"application/json": {"schema": {"$ref": "#/components/schemas/Error"}}}
+					}
+				},
+				"x-mint": {"metadata": {"title": "Switch subscription to the current list price"}},
+				"description": "Moves the authenticated user's grandfathered premium subscription down to the current list price for the same currency and billing cycle, effective at the end of the current billing period. The target price is resolved on the server and the switch is refused unless it lowers the amount charged.",
+				"security": [{"sessionToken": []}]
+			}
+		},
 		"/premium/visionary/rejoin": {
 			"post": {
 				"operationId": "rejoin_visionary_guild",
@@ -32194,6 +32261,7 @@
 							"pending_subscription_change": {
 								"anyOf": [{"$ref": "#/components/schemas/PendingSubscriptionChangeResponse"}, {"type": "null"}]
 							},
+							"list_price_switch": {"$ref": "#/components/schemas/ListPriceSwitchState"},
 							"subscription": {
 								"anyOf": [{"$ref": "#/components/schemas/PremiumBillingSubscriptionResponse"}, {"type": "null"}]
 							},
@@ -32209,6 +32277,7 @@
 							"stripe_customer_id",
 							"current_subscription_price",
 							"pending_subscription_change",
+							"list_price_switch",
 							"subscription",
 							"invoices",
 							"invoices_has_more",
@@ -32241,6 +32310,12 @@
 								"type": "string",
 								"description": "Stripe subscription schedule ID managing the pending change"
 							},
+							"change_kind": {
+								"enum": ["billing_cycle", "price"],
+								"type": "string",
+								"x-enumNames": ["billing_cycle", "price"],
+								"description": "Whether the pending change moves the billing cycle or only the price within the same cycle"
+							},
 							"current_billing_cycle": {
 								"anyOf": [
 									{"enum": ["monthly", "yearly"], "type": "string", "x-enumNames": ["monthly", "yearly"]},
@@ -32263,6 +32338,10 @@
 								"anyOf": [{"type": "string"}, {"type": "null"}],
 								"description": "Stripe price ID that will be used after the change"
 							},
+							"target_amount_minor": {
+								"anyOf": [{"type": "integer", "format": "int53"}, {"type": "null"}],
+								"description": "Unit amount of the price that will be used after the change, in the currency minor unit"
+							},
 							"currency": {
 								"anyOf": [
 									{
@@ -32289,11 +32368,13 @@
 						},
 						"required": [
 							"schedule_id",
+							"change_kind",
 							"current_billing_cycle",
 							"target_billing_cycle",
 							"effective_at",
 							"current_price_id",
 							"target_price_id",
+							"target_amount_minor",
 							"currency",
 							"initial_amount_minor",
 							"recurring_amount_minor",
@@ -32303,6 +32384,104 @@
 					{"type": "null"}
 				]
 			},
+			"ListPriceSwitchState": {
+				"type": "object",
+				"properties": {
+					"available": {
+						"type": "boolean",
+						"description": "Whether the authenticated user can move their subscription down to the current list price right now"
+					},
+					"reason": {
+						"anyOf": [{"$ref": "#/components/schemas/ListPriceSwitchIneligibilityReason"}, {"type": "null"}],
+						"description": "Why the switch is unavailable, when available is false"
+					},
+					"pending": {
+						"type": "boolean",
+						"description": "Whether a switch to the current list price is already scheduled"
+					},
+					"current_price_id": {
+						"anyOf": [{"type": "string"}, {"type": "null"}],
+						"description": "Stripe price ID the subscription is billed against today"
+					},
+					"current_amount_minor": {
+						"anyOf": [{"type": "integer", "format": "int53"}, {"type": "null"}],
+						"description": "Amount the subscription is billed today, in the currency minor unit"
+					},
+					"list_price_id": {
+						"anyOf": [{"type": "string"}, {"type": "null"}],
+						"description": "Current list Stripe price ID for the same cycle and currency"
+					},
+					"list_amount_minor": {
+						"anyOf": [{"type": "integer", "format": "int53"}, {"type": "null"}],
+						"description": "Current list price for the same cycle and currency, in the currency minor unit"
+					},
+					"currency": {
+						"anyOf": [
+							{
+								"enum": ["USD", "EUR", "BRL", "INR", "PLN", "TRY"],
+								"type": "string",
+								"x-enumNames": ["USD", "EUR", "BRL", "INR", "PLN", "TRY"]
+							},
+							{"type": "null"}
+						],
+						"description": "Currency of both the current and the list amount"
+					},
+					"billing_cycle": {
+						"anyOf": [
+							{"enum": ["monthly", "yearly"], "type": "string", "x-enumNames": ["monthly", "yearly"]},
+							{"type": "null"}
+						],
+						"description": "Recurring billing cycle the switch applies to"
+					},
+					"effective_at": {
+						"anyOf": [{"type": "string"}, {"type": "null"}],
+						"description": "ISO timestamp the switch takes effect, which is the end of the current billing period"
+					}
+				},
+				"required": [
+					"available",
+					"reason",
+					"pending",
+					"current_price_id",
+					"current_amount_minor",
+					"list_price_id",
+					"list_amount_minor",
+					"currency",
+					"billing_cycle",
+					"effective_at"
+				]
+			},
+			"ListPriceSwitchIneligibilityReason": {
+				"enum": [
+					"feature_unavailable",
+					"no_active_subscription",
+					"subscription_not_chargeable",
+					"unsupported_subscription",
+					"no_list_price",
+					"already_on_list_price",
+					"not_a_price_decrease",
+					"subscription_cancelling",
+					"cancellation_managed_by_schedule",
+					"conflicting_pending_change",
+					"missing_period_end",
+					"switch_in_progress"
+				],
+				"type": "string",
+				"x-enumNames": [
+					"feature_unavailable",
+					"no_active_subscription",
+					"subscription_not_chargeable",
+					"unsupported_subscription",
+					"no_list_price",
+					"already_on_list_price",
+					"not_a_price_decrease",
+					"subscription_cancelling",
+					"cancellation_managed_by_schedule",
+					"conflicting_pending_change",
+					"missing_period_end",
+					"switch_in_progress"
+				]
+			},
 			"PremiumBillingSubscriptionResponse": {
 				"type": "object",
 				"properties": {
@@ -32544,6 +32723,134 @@
 					"status"
 				]
 			},
+			"SwitchToListPriceResponse": {
+				"oneOf": [
+					{"$ref": "#/components/schemas/ScheduledSwitchToListPriceResponse"},
+					{"$ref": "#/components/schemas/AlreadyScheduledSwitchToListPriceResponse"},
+					{"$ref": "#/components/schemas/IneligibleSwitchToListPriceResponse"}
+				]
+			},
+			"ScheduledSwitchToListPriceResponse": {
+				"type": "object",
+				"properties": {
+					"status": {
+						"type": "string",
+						"enum": ["scheduled"],
+						"description": "The switch was scheduled for the end of the current billing period"
+					},
+					"effective_at": {"type": "string", "description": "ISO timestamp the switch takes effect"},
+					"target_price_id": {
+						"type": "string",
+						"description": "Stripe price ID the subscription will be billed against after the switch"
+					},
+					"target_amount_minor": {
+						"type": "integer",
+						"format": "int53",
+						"description": "Amount billed after the switch, in the currency minor unit"
+					},
+					"current_amount_minor": {
+						"type": "integer",
+						"format": "int53",
+						"description": "Amount billed before the switch, in the currency minor unit"
+					},
+					"currency": {
+						"enum": ["USD", "EUR", "BRL", "INR", "PLN", "TRY"],
+						"type": "string",
+						"x-enumNames": ["USD", "EUR", "BRL", "INR", "PLN", "TRY"],
+						"description": "Currency of both amounts"
+					}
+				},
+				"required": [
+					"status",
+					"effective_at",
+					"target_price_id",
+					"target_amount_minor",
+					"current_amount_minor",
+					"currency"
+				]
+			},
+			"AlreadyScheduledSwitchToListPriceResponse": {
+				"type": "object",
+				"properties": {
+					"status": {
+						"type": "string",
+						"enum": ["already_scheduled"],
+						"description": "The switch was already scheduled by an earlier request"
+					},
+					"effective_at": {"type": "string", "description": "ISO timestamp the switch takes effect"},
+					"target_price_id": {
+						"type": "string",
+						"description": "Stripe price ID the subscription will be billed against after the switch"
+					},
+					"target_amount_minor": {
+						"type": "integer",
+						"format": "int53",
+						"description": "Amount billed after the switch, in the currency minor unit"
+					},
+					"current_amount_minor": {
+						"type": "integer",
+						"format": "int53",
+						"description": "Amount billed before the switch, in the currency minor unit"
+					},
+					"currency": {
+						"enum": ["USD", "EUR", "BRL", "INR", "PLN", "TRY"],
+						"type": "string",
+						"x-enumNames": ["USD", "EUR", "BRL", "INR", "PLN", "TRY"],
+						"description": "Currency of both amounts"
+					}
+				},
+				"required": [
+					"status",
+					"effective_at",
+					"target_price_id",
+					"target_amount_minor",
+					"current_amount_minor",
+					"currency"
+				]
+			},
+			"IneligibleSwitchToListPriceResponse": {
+				"type": "object",
+				"properties": {
+					"status": {
+						"type": "string",
+						"enum": ["ineligible"],
+						"description": "The subscription cannot be moved to the current list price"
+					},
+					"reason": {
+						"enum": [
+							"feature_unavailable",
+							"no_active_subscription",
+							"subscription_not_chargeable",
+							"unsupported_subscription",
+							"no_list_price",
+							"already_on_list_price",
+							"not_a_price_decrease",
+							"subscription_cancelling",
+							"cancellation_managed_by_schedule",
+							"conflicting_pending_change",
+							"missing_period_end",
+							"switch_in_progress"
+						],
+						"type": "string",
+						"x-enumNames": [
+							"feature_unavailable",
+							"no_active_subscription",
+							"subscription_not_chargeable",
+							"unsupported_subscription",
+							"no_list_price",
+							"already_on_list_price",
+							"not_a_price_decrease",
+							"subscription_cancelling",
+							"cancellation_managed_by_schedule",
+							"conflicting_pending_change",
+							"missing_period_end",
+							"switch_in_progress"
+						],
+						"description": "Why the switch was refused"
+					}
+				},
+				"required": ["status", "reason"]
+			},
 			"ReadStateAckResponse": {
 				"type": "object",
 				"properties": {

fluxer_api/src/api/report/ReportService.ts

@@ -343,7 +343,7 @@ export class ReportService {
 		const normalizedEmail = this.normalizeEmail(email);
 		const hasValidDns = await this.emailDnsValidationService.hasValidDnsRecords(normalizedEmail);
 		if (!hasValidDns) {
-			throw InputValidationError.fromCode('email', ValidationErrorCodes.INVALID_EMAIL_ADDRESS);
+			throw InputValidationError.fromCode('email', ValidationErrorCodes.EMAIL_DOMAIN_CANNOT_RECEIVE_MAIL);
 		}
 		const verificationCode = this.generateDsaVerificationCode();
 		const expiresAt = new Date(Date.now() + ms('10 minutes'));

fluxer_api/src/api/risk/IpBanCgnatGuard.ts

@@ -7,9 +7,14 @@ import {isTrustedCommercialPrivacyProvider} from './TrustedPrivacyProviders';
 
 const VERDICT_CACHE_TTL_MS = 60 * 60 * 1000;
 
+interface IpBanBlastRadiusVerdict {
+	cgnat: boolean;
+	sharedAccess: boolean;
+}
+
 interface CachedVerdict {
 	expiresAtMs: number;
-	highRisk: boolean;
+	verdict: IpBanBlastRadiusVerdict;
 }
 
 const verdictCache = new Map<string, CachedVerdict>();
@@ -48,7 +53,7 @@ export function getSuspiciousIpSkipReason(result: IpInfoLookupResult): Suspiciou
 	return null;
 }
 
-function isHighSharedAccessBlastRadiusRisk(result: IpInfoLookupResult): boolean {
+export function isHighSharedAccessBlastRadiusRisk(result: IpInfoLookupResult): boolean {
 	if (result.flags.isHosting || isAnonymousAccess(result)) {
 		return false;
 	}
@@ -60,29 +65,32 @@ export function isSingleIpBanCandidate(value: string): boolean {
 	return parseIpBanEntry(value)?.type === 'single';
 }
 
-export async function hasHighCgnatBlastRadiusRisk(
+export async function getIpBanBlastRadiusVerdict(
 	ip: string,
 	ipInfoService: IpInfoService,
 	context: {
 		source: string;
 		reason: string;
 	},
-): Promise<boolean> {
+): Promise<IpBanBlastRadiusVerdict> {
 	const now = Date.now();
 	const cacheKey = getSameIpDecisionKey(ip) ?? ip;
 	const cached = verdictCache.get(cacheKey);
 	if (cached && cached.expiresAtMs > now) {
-		return cached.highRisk;
+		return cached.verdict;
 	}
 	const result = await ipInfoService.lookup(ip, {
 		source: context.source,
 		reason: context.reason,
 		metadata: {policy: 'ip_ban_cgnat_guard'},
 	});
-	const highRisk = isHighCgnatBlastRadiusRisk(result);
+	const verdict: IpBanBlastRadiusVerdict = {
+		cgnat: isHighCgnatBlastRadiusRisk(result),
+		sharedAccess: isHighSharedAccessBlastRadiusRisk(result),
+	};
 	verdictCache.set(cacheKey, {
-		highRisk,
+		verdict,
 		expiresAtMs: now + VERDICT_CACHE_TTL_MS,
 	});
-	return highRisk;
+	return verdict;
 }

fluxer_api/src/api/risk/__tests__/IpBanCgnatGuard.test.ts

@@ -2,7 +2,11 @@
 
 import type {IpInfoLookupResult} from '@pkgs/geoip/src/IpInfoService';
 import {describe, expect, it} from 'vitest';
-import {isHighCgnatBlastRadiusRisk, isSingleIpBanCandidate} from '../IpBanCgnatGuard';
+import {
+	isHighCgnatBlastRadiusRisk,
+	isHighSharedAccessBlastRadiusRisk,
+	isSingleIpBanCandidate,
+} from '../IpBanCgnatGuard';
 
 function ipInfoResult(overrides: Partial<IpInfoLookupResult> = {}): IpInfoLookupResult {
 	return {
@@ -96,4 +100,63 @@ describe('IpBanCgnatGuard', () => {
 			),
 		).toBe(false);
 	});
+	it('flags satellite, anycast and education networks as high blast-radius risk', () => {
+		expect(
+			isHighSharedAccessBlastRadiusRisk(
+				ipInfoResult({
+					flags: {isAnycast: false, isHosting: false, isMobile: false, isSatellite: true},
+				}),
+			),
+		).toBe(true);
+		expect(
+			isHighSharedAccessBlastRadiusRisk(
+				ipInfoResult({
+					flags: {isAnycast: true, isHosting: false, isMobile: false, isSatellite: false},
+				}),
+			),
+		).toBe(true);
+		expect(
+			isHighSharedAccessBlastRadiusRisk(
+				ipInfoResult({asn: {asn: 'AS64500', number: 64500, name: 'Test University', domain: null, type: 'education'}}),
+			),
+		).toBe(true);
+	});
+	it('does not flag ordinary residential networks as shared-access risk', () => {
+		expect(isHighSharedAccessBlastRadiusRisk(ipInfoResult())).toBe(false);
+	});
+	it('does not treat shared-access networks as CGNAT risk', () => {
+		expect(
+			isHighCgnatBlastRadiusRisk(
+				ipInfoResult({
+					flags: {isAnycast: false, isHosting: false, isMobile: false, isSatellite: true},
+				}),
+			),
+		).toBe(false);
+	});
+	it('does not exempt hosting or anonymous shared-access infrastructure', () => {
+		expect(
+			isHighSharedAccessBlastRadiusRisk(
+				ipInfoResult({
+					flags: {isAnycast: true, isHosting: true, isMobile: false, isSatellite: false},
+				}),
+			),
+		).toBe(false);
+		expect(
+			isHighSharedAccessBlastRadiusRisk(
+				ipInfoResult({
+					anonymous: {
+						isAnonymous: true,
+						providerName: 'Example VPN',
+						isVpn: true,
+						isProxy: false,
+						isResidentialProxy: false,
+						isTor: false,
+						isRelay: false,
+						percentDaysSeen: null,
+					},
+					flags: {isAnycast: false, isHosting: false, isMobile: false, isSatellite: true},
+				}),
+			),
+		).toBe(false);
+	});
 });

fluxer_api/src/api/stripe/ProductRegistry.ts

@@ -2,6 +2,7 @@
 
 import {UserPremiumTypes} from '@fluxer/constants/src/UserConstants';
 import {Config} from '../Config';
+import {Logger} from '../Logger';
 import type {Currency} from '../utils/CurrencyUtils';
 
 export enum ProductType {
@@ -22,10 +23,66 @@ export interface ProductInfo {
 	billingCycle?: RecurringBillingCycle;
 }
 
+const LEGACY_SLOT_SHAPES: Record<string, Omit<ProductInfo, 'currency'> | undefined> = {
+	monthly: {
+		type: ProductType.MONTHLY_SUBSCRIPTION,
+		premiumType: UserPremiumTypes.SUBSCRIPTION,
+		durationMonths: 1,
+		isGift: false,
+		billingCycle: 'monthly',
+	},
+	yearly: {
+		type: ProductType.YEARLY_SUBSCRIPTION,
+		premiumType: UserPremiumTypes.SUBSCRIPTION,
+		durationMonths: 12,
+		isGift: false,
+		billingCycle: 'yearly',
+	},
+	gift_1_month: {
+		type: ProductType.GIFT_1_MONTH,
+		premiumType: UserPremiumTypes.SUBSCRIPTION,
+		durationMonths: 1,
+		isGift: true,
+	},
+	gift_1_year: {
+		type: ProductType.GIFT_1_YEAR,
+		premiumType: UserPremiumTypes.SUBSCRIPTION,
+		durationMonths: 12,
+		isGift: true,
+	},
+};
+
+const LEGACY_SLOT_CURRENCIES: Record<string, Currency | undefined> = {
+	usd: 'USD',
+	eur: 'EUR',
+	brl: 'BRL',
+	inr: 'INR',
+	pln: 'PLN',
+	try: 'TRY',
+};
+
+function parseLegacySlot(slot: string): ProductInfo | null {
+	const separatorIndex = slot.lastIndexOf('_');
+	if (separatorIndex <= 0) {
+		return null;
+	}
+	const shape = LEGACY_SLOT_SHAPES[slot.slice(0, separatorIndex)];
+	const currency = LEGACY_SLOT_CURRENCIES[slot.slice(separatorIndex + 1).toLowerCase()];
+	if (!shape || !currency) {
+		return null;
+	}
+	return {...shape, currency};
+}
+
 export class ProductRegistry {
 	private products = new Map<string, ProductInfo>();
 
 	constructor() {
+		this.registerConfiguredProducts();
+		this.registerLegacyProducts();
+	}
+
+	private registerConfiguredProducts(): void {
 		const prices = Config.stripe.prices;
 		if (!prices) return;
 		this.registerProduct(prices.monthlyUsd, {
@@ -210,6 +267,32 @@ export class ProductRegistry {
 		});
 	}
 
+	private registerLegacyProducts(): void {
+		const legacyPrices = Config.stripe.legacyPrices;
+		if (!legacyPrices) return;
+		if (typeof legacyPrices !== 'object' || Array.isArray(legacyPrices)) {
+			Logger.warn({}, 'Ignoring legacy Stripe price configuration that is not an object of slot names to price ids');
+			return;
+		}
+		for (const [slot, priceIds] of Object.entries(legacyPrices)) {
+			if (!Array.isArray(priceIds)) {
+				Logger.warn({slot}, 'Ignoring legacy Stripe price slot that is not a list of price IDs');
+				continue;
+			}
+			const info = parseLegacySlot(slot);
+			if (!info) {
+				Logger.warn({slot}, 'Ignoring legacy Stripe price slot with an unrecognised name or currency');
+				continue;
+			}
+			for (const priceId of priceIds) {
+				if (!priceId || this.products.has(priceId)) {
+					continue;
+				}
+				this.products.set(priceId, info);
+			}
+		}
+	}
+
 	private registerProduct(priceId: string | undefined, info: ProductInfo): void {
 		if (priceId) {
 			this.products.set(priceId, info);

fluxer_api/src/api/stripe/StripeController.ts

@@ -18,6 +18,7 @@ import {
 	PriceIdsResponse,
 	SelfServeRefundEligibilityResponse,
 	SelfServeRefundResponse,
+	SwitchToListPriceResponse,
 	UrlResponse,
 	WebhookReceivedResponse,
 } from '@fluxer/schema/src/domains/premium/PremiumSchemas';
@@ -494,6 +495,27 @@ export function StripeController(app: HonoApp) {
 			return ctx.body(null, 204);
 		},
 	);
+	app.post(
+		'/premium/switch-to-list-price',
+		RateLimitMiddleware(RateLimitConfigs.STRIPE_SUBSCRIPTION_CHANGE),
+		LoginRequired,
+		DefaultUserOnly,
+		OpenAPI({
+			operationId: 'switch_subscription_to_list_price',
+			summary: 'Switch subscription to the current list price',
+			description:
+				"Moves the authenticated user's grandfathered premium subscription down to the current list price for the same currency and billing cycle, effective at the end of the current billing period. The target price is resolved on the server and the switch is refused unless it lowers the amount charged.",
+			responseSchema: SwitchToListPriceResponse,
+			statusCode: 200,
+			security: ['bearerToken', 'sessionToken'],
+			tags: 'Premium',
+		}),
+		async (ctx) => {
+			const userId = ctx.get('user').id;
+			const result = await ctx.get('stripeService').switchSubscriptionToCurrentListPrice(userId);
+			return ctx.json(result);
+		},
+	);
 	app.post(
 		'/premium/cancel-pending-subscription-change',
 		RateLimitMiddleware(RateLimitConfigs.STRIPE_SUBSCRIPTION_CHANGE),

fluxer_api/src/api/stripe/StripeService.ts

@@ -7,6 +7,7 @@ import type {
 	PricingMode,
 	SelfServeRefundEligibilityResponse,
 	SelfServeRefundResponse,
+	SwitchToListPriceResponse,
 } from '@fluxer/schema/src/domains/premium/PremiumSchemas';
 import type {ICacheService} from '@pkgs/cache/src/ICacheService';
 import Stripe from 'stripe';
@@ -201,6 +202,10 @@ export class StripeService {
 		return this.subscriptionService.changeBillingCycle(userId, billingCycle, effectiveAt);
 	}
 
+	async switchSubscriptionToCurrentListPrice(userId: UserID): Promise<SwitchToListPriceResponse> {
+		return this.subscriptionService.switchToCurrentListPrice(userId);
+	}
+
 	async cancelPendingSubscriptionChange(userId: UserID): Promise<void> {
 		return this.subscriptionService.cancelPendingSubscriptionChange(userId);
 	}

fluxer_api/src/api/stripe/services/PremiumStateService.ts

@@ -4,6 +4,8 @@ import {PremiumFlags, UserPremiumTypes} from '@fluxer/constants/src/UserConstant
 import {UnknownUserError} from '@fluxer/errors/src/domains/user/UnknownUserError';
 import type {
 	CurrentSubscriptionPriceResponse,
+	ListPriceSwitchState,
+	PendingSubscriptionChangeKind,
 	PendingSubscriptionChangeResponse,
 	PremiumBillingInvoiceResponse,
 	PremiumBillingPaymentMethodResponse,
@@ -264,6 +266,9 @@ export class PremiumStateService {
 			this.resolvePricing(countryCode),
 		]);
 		const refundEligibilityState = await this.resolveRefundEligibility(user, invoices.allRows);
+		const listPriceSwitch = this.resolveListPriceSwitch(subscription, subscriptionPrice, pendingSubscriptionChange);
+		const pendingBillingCycleChange =
+			pendingSubscriptionChange?.change_kind === 'billing_cycle' ? pendingSubscriptionChange : null;
 		const activePaidPremium = checkHasActivePaidPremium(user);
 		const isEffectivePremium = user.isPremium();
 		const actualPremiumEndAt = user.effectivePremiumUntil;
@@ -298,7 +303,8 @@ export class PremiumStateService {
 			billing: {
 				stripe_customer_id: customerIds[0] ?? user.stripeCustomerId ?? null,
 				current_subscription_price: subscriptionPrice,
-				pending_subscription_change: pendingSubscriptionChange,
+				pending_subscription_change: pendingBillingCycleChange,
+				list_price_switch: listPriceSwitch,
 				subscription: subscription ? await this.mapSubscription(subscription) : null,
 				invoices: invoices.rows.map(mapInvoice),
 				invoices_has_more: invoices.hasMore,
@@ -576,8 +582,16 @@ export class PremiumStateService {
 		const targetItem = futurePhase.items[0] ?? null;
 		const targetPriceDetails = await this.resolveStripePriceDetails(targetItem?.price ?? null);
 		const metadataTargetBillingCycle = normalizeBillingCycle(schedule.metadata?.pending_billing_cycle);
-		const targetBillingCycle = targetPriceDetails.billingCycle ?? metadataTargetBillingCycle;
-		if (!targetBillingCycle || targetBillingCycle === currentBillingCycle) {
+		const targetBillingCycle = targetPriceDetails.billingCycle ?? metadataTargetBillingCycle ?? currentBillingCycle;
+		if (!targetBillingCycle) {
+			return null;
+		}
+		const changeKind: PendingSubscriptionChangeKind =
+			targetBillingCycle === currentBillingCycle ? 'price' : 'billing_cycle';
+		if (
+			changeKind === 'price' &&
+			(targetPriceDetails.priceId == null || targetPriceDetails.priceId === currentPriceDetails.priceId)
+		) {
 			return null;
 		}
 		const quantity = targetItem?.quantity ?? currentItem?.quantity ?? 1;
@@ -598,11 +612,13 @@ export class PremiumStateService {
 		const creditAmountMinor = firstInvoiceAdjustmentTotal < 0 ? -firstInvoiceAdjustmentTotal : null;
 		return {
 			schedule_id: schedule.id,
+			change_kind: changeKind,
 			current_billing_cycle: currentBillingCycle,
 			target_billing_cycle: targetBillingCycle,
 			effective_at: new Date(futurePhase.start_date * 1000).toISOString(),
 			current_price_id: currentPriceDetails.priceId,
 			target_price_id: targetPriceDetails.priceId,
+			target_amount_minor: targetPriceDetails.amountMinor,
 			currency: targetPriceDetails.currency,
 			initial_amount_minor: initialAmountMinor,
 			recurring_amount_minor: recurringAmountMinor,
@@ -610,6 +626,62 @@ export class PremiumStateService {
 		};
 	}
 
+	private resolveListPriceSwitch(
+		subscription: BillingSubscriptionRow | null,
+		subscriptionPrice: CurrentSubscriptionPriceResponse,
+		pendingChange: PendingSubscriptionChangeResponse,
+	): ListPriceSwitchState {
+		const base = {
+			pending: false,
+			current_price_id: subscriptionPrice?.price_id ?? null,
+			current_amount_minor: subscriptionPrice?.amount_minor ?? null,
+			list_price_id: subscriptionPrice?.list_price_id ?? null,
+			list_amount_minor: subscriptionPrice?.list_amount_minor ?? null,
+			currency: subscriptionPrice?.currency ?? null,
+			billing_cycle: subscriptionPrice?.billing_cycle ?? null,
+			effective_at: toIso(subscription?.current_period_end),
+		};
+		if (Config.instance.selfHosted || !Config.stripe.enabled || !Config.stripe.secretKey) {
+			return {...base, available: false, reason: 'feature_unavailable'};
+		}
+		if (!subscription) {
+			return {...base, available: false, reason: 'no_active_subscription'};
+		}
+		if (!subscriptionPrice) {
+			return {...base, available: false, reason: 'unsupported_subscription'};
+		}
+		if (!subscription.status || !ACTIVE_SUBSCRIPTION_STATUSES.has(subscription.status)) {
+			return {...base, available: false, reason: 'subscription_not_chargeable'};
+		}
+		if (subscription.cancel_at != null || subscription.cancel_at_period_end === true) {
+			return {...base, available: false, reason: 'subscription_cancelling'};
+		}
+		if (pendingChange) {
+			const targetsListPrice =
+				subscriptionPrice.list_price_id != null && pendingChange.target_price_id === subscriptionPrice.list_price_id;
+			return {
+				...base,
+				available: false,
+				reason: targetsListPrice ? null : 'conflicting_pending_change',
+				pending: targetsListPrice,
+				effective_at: pendingChange.effective_at,
+			};
+		}
+		if (subscriptionPrice.list_price_id == null || subscriptionPrice.list_amount_minor == null) {
+			return {...base, available: false, reason: 'no_list_price'};
+		}
+		if (subscriptionPrice.list_price_id === subscriptionPrice.price_id) {
+			return {...base, available: false, reason: 'already_on_list_price'};
+		}
+		if (subscriptionPrice.list_amount_minor >= subscriptionPrice.amount_minor) {
+			return {...base, available: false, reason: 'not_a_price_decrease'};
+		}
+		if (base.effective_at == null) {
+			return {...base, available: false, reason: 'missing_period_end'};
+		}
+		return {...base, available: true, reason: null};
+	}
+
 	private async resolveStripePriceDetails(
 		priceRef: Stripe.Price | Stripe.DeletedPrice | string | null | undefined,
 	): Promise<StripePriceDetails> {

fluxer_api/src/api/stripe/services/StripeDisputeWebhookHandler.ts

@@ -5,11 +5,13 @@ import {PremiumFlags, UserFlags} from '@fluxer/constants/src/UserConstants';
 import {StripeError} from '@fluxer/errors/src/domains/payment/StripeError';
 import type {IEmailService} from '@pkgs/email/src/IEmailService';
 import type Stripe from 'stripe';
+import type {UserRow} from '../../database/types/UserTypes';
 import type {IDonationRepository} from '../../donation/IDonationRepository';
 import type {IGatewayService} from '../../infrastructure/IGatewayService';
 import type {KVAccountDeletionQueueService} from '../../infrastructure/KVAccountDeletionQueueService';
 import type {UserCacheService} from '../../infrastructure/UserCacheService';
 import {Logger} from '../../Logger';
+import {getBillingRepository} from '../../middleware/ServiceRegistry';
 import type {GiftCode} from '../../models/GiftCode';
 import type {User} from '../../models/User';
 import type {IUserRepository} from '../../user/IUserRepository';
@@ -19,6 +21,8 @@ import {extractId} from '../StripeUtils';
 import type {StripeGiftReversalHandler} from './StripeGiftReversalHandler';
 import type {StripePaymentFraudService} from './StripePaymentFraudService';
 
+export const REFUND_ALLOWANCE_CLAIM_PREFIX = 'refund-allowance';
+
 export class StripeDisputeWebhookHandler {
 	constructor(
 		private userRepository: IUserRepository,
@@ -105,7 +109,7 @@ export class StripeDisputeWebhookHandler {
 			}
 			Logger.debug(
 				{userId: payment.userId},
-				'User unsuspended after chargeback withdrawal - 30 day purchase block applied',
+				'User unsuspended after chargeback withdrawal - 30 day self-serve refund cooldown applied',
 			);
 		}
 	}
@@ -167,25 +171,94 @@ export class StripeDisputeWebhookHandler {
 			);
 			user = foundUser;
 		}
-		if (!user.firstRefundAt) {
-			const updatedUser = await this.userRepository.patchUpsert(user.id, {first_refund_at: new Date()}, user.toRow());
-			await this.dispatchUser(updatedUser);
+		const claimKeys = await this.resolveRefundAllowanceClaimKeys(charge);
+		if (claimKeys.length === 0) {
 			Logger.debug(
 				{userId: user.id, chargeId: charge.id, paymentIntentId},
-				'First refund recorded - 30 day purchase block applied',
-			);
-		} else {
-			const updatedUser = await this.userRepository.patchUpsert(
-				user.id,
-				{premium_flags: user.premiumFlags | PremiumFlags.PURCHASE_DISABLED},
-				user.toRow(),
-			);
-			await this.dispatchUser(updatedUser);
-			Logger.debug(
-				{userId: user.id, chargeId: charge.id, paymentIntentId},
-				'Second refund recorded - permanent purchase block applied',
+				'Refund was issued by Fluxer - not counted against the user refund allowance',
 			);
+			return;
 		}
+		const claimedKeys: Array<string> = [];
+		let alreadyCounted = false;
+		for (const claimKey of claimKeys) {
+			const claim = await getBillingRepository().webhookEvents.tryClaim(claimKey);
+			if (claim === 'claimed') {
+				claimedKeys.push(claimKey);
+			} else {
+				alreadyCounted = true;
+			}
+		}
+		if (alreadyCounted) {
+			for (const claimKey of claimedKeys) {
+				await getBillingRepository().webhookEvents.markProcessed(claimKey);
+			}
+			Logger.debug(
+				{userId: user.id, chargeId: charge.id, paymentIntentId, claimKeys},
+				'Refund already counted against the user refund allowance',
+			);
+			return;
+		}
+		const isFirstRefund = !user.firstRefundAt;
+		const patch: Partial<UserRow> = isFirstRefund
+			? {first_refund_at: new Date()}
+			: {premium_flags: user.premiumFlags | PremiumFlags.PURCHASE_DISABLED};
+		let updatedUser: User;
+		try {
+			updatedUser = await this.userRepository.patchUpsert(user.id, patch, user.toRow());
+		} catch (error) {
+			for (const claimKey of claimedKeys) {
+				await getBillingRepository().webhookEvents.releaseClaim(claimKey);
+			}
+			throw error;
+		}
+		for (const claimKey of claimedKeys) {
+			await getBillingRepository().webhookEvents.markProcessed(claimKey);
+		}
+		await this.dispatchUser(updatedUser);
+		Logger.debug(
+			{userId: user.id, chargeId: charge.id, paymentIntentId},
+			isFirstRefund
+				? 'First refund recorded - 30 day self-serve refund cooldown applied'
+				: 'Second refund recorded - permanent purchase block applied',
+		);
+	}
+
+	private async resolveRefundAllowanceClaimKeys(charge: Stripe.Charge): Promise<Array<string>> {
+		const chargeClaimKey = `${REFUND_ALLOWANCE_CLAIM_PREFIX}:${charge.id}`;
+		const inlined = charge.refunds?.data ?? [];
+		const refunds = (
+			inlined.length > 0
+				? inlined.map((refund) => ({
+						id: refund.id,
+						createdAtMs: refund.created * 1000,
+						status: refund.status,
+						rejectionReason: refund.metadata?.rejection_reason ?? null,
+					}))
+				: (await getBillingRepository().refunds.listByCharge(charge.id)).map((row) => ({
+						id: row.provider_id,
+						createdAtMs: row.stripe_created_at?.getTime() ?? 0,
+						status: row.status,
+						rejectionReason: row.metadata?.get('rejection_reason') ?? null,
+					}))
+		).filter((refund) => refund.status !== 'failed' && refund.status !== 'canceled');
+		if (refunds.length === 0) {
+			Logger.warn(
+				{chargeId: charge.id},
+				'No refund records found for refunded charge; counting the charge once against the user refund allowance',
+			);
+			return [chargeClaimKey];
+		}
+		const customerRefunds = refunds
+			.filter((refund) => refund.rejectionReason === null)
+			.sort((left, right) => left.createdAtMs - right.createdAtMs || left.id.localeCompare(right.id));
+		const earliest = customerRefunds[0];
+		const latest = customerRefunds[customerRefunds.length - 1];
+		if (!earliest || !latest) {
+			return [];
+		}
+		const latestClaimKey = `${REFUND_ALLOWANCE_CLAIM_PREFIX}:${latest.id}`;
+		return latest.id === earliest.id ? [chargeClaimKey, latestClaimKey] : [latestClaimKey];
 	}
 
 	private async handleGiftChargeback(giftCode: GiftCode, dispute: Stripe.Dispute): Promise<void> {

fluxer_api/src/api/stripe/services/StripeRefundService.ts

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
+import {PremiumFlags} from '@fluxer/constants/src/UserConstants';
 import {FeatureNotAvailableSelfHostedError} from '@fluxer/errors/src/domains/core/FeatureNotAvailableSelfHostedError';
 import {StripeError} from '@fluxer/errors/src/domains/payment/StripeError';
 import {StripeNoPurchaseHistoryError} from '@fluxer/errors/src/domains/payment/StripeNoPurchaseHistoryError';
@@ -15,11 +16,13 @@ import type {
 import type Stripe from 'stripe';
 import {createUserID, type UserID} from '../../BrandedTypes';
 import {Config} from '../../Config';
+import type {UserRow} from '../../database/types/UserTypes';
 import {Logger} from '../../Logger';
 import {getBillingRepository} from '../../middleware/ServiceRegistry';
 import type {User} from '../../models/User';
 import type {IUserRepository} from '../../user/IUserRepository';
 import {extractId} from '../StripeUtils';
+import {REFUND_ALLOWANCE_CLAIM_PREFIX} from './StripeDisputeWebhookHandler';
 import type {StripeSubscriptionService} from './StripeSubscriptionService';
 
 const MILLISECONDS_PER_DAY = 24 * 60 * 60 * 1000;
@@ -260,16 +263,35 @@ export class StripeRefundService {
 			try {
 				await this.subscriptionService.cancelSubscriptionImmediately(user.id, 'self_serve_refund');
 			} catch (error) {
-				Logger.warn(
+				Logger.error(
 					{error, userId: user.id.toString(), subscriptionId},
-					'Self-serve refund confirmed but subscription cancellation failed; will reconcile via webhook',
+					'Self-serve refund confirmed but subscription cancellation failed; the subscription is still active and will keep billing until it is cancelled manually',
 				);
 			}
 		}
-		await this.userRepository.patchUpsert(user.id, {first_refund_at: new Date()}, user.toRow());
+		const claimKey = `${REFUND_ALLOWANCE_CLAIM_PREFIX}:${refund.id}`;
+		const claim = await getBillingRepository().webhookEvents.tryClaim(claimKey);
+		if (claim !== 'claimed') {
+			Logger.debug(
+				{userId: user.id.toString(), refundId: refund.id, claim},
+				'Self-serve refund already counted against the user refund allowance',
+			);
+			return;
+		}
+		const isFirstRefund = !user.firstRefundAt;
+		const patch: Partial<UserRow> = isFirstRefund
+			? {first_refund_at: new Date()}
+			: {premium_flags: user.premiumFlags | PremiumFlags.PURCHASE_DISABLED};
+		try {
+			await this.userRepository.patchUpsert(user.id, patch, user.toRow());
+		} catch (error) {
+			await getBillingRepository().webhookEvents.releaseClaim(claimKey);
+			throw error;
+		}
+		await getBillingRepository().webhookEvents.markProcessed(claimKey);
 		Logger.info(
-			{userId: user.id.toString(), refundId: refund.id, subscriptionId: subscriptionId || null},
-			'Self-serve refund confirmed succeeded; cooldown and cancellation finalized',
+			{userId: user.id.toString(), refundId: refund.id, subscriptionId: subscriptionId || null, isFirstRefund},
+			'Self-serve refund confirmed succeeded; refund allowance and cancellation finalized',
 		);
 	}
 

fluxer_api/src/api/stripe/services/StripeSubscriptionService.ts

@@ -10,7 +10,10 @@ import {StripePaymentNotAvailableError} from '@fluxer/errors/src/domains/payment
 import {StripeSubscriptionAlreadyCancelingError} from '@fluxer/errors/src/domains/payment/StripeSubscriptionAlreadyCancelingError';
 import {StripeSubscriptionNotCancelingError} from '@fluxer/errors/src/domains/payment/StripeSubscriptionNotCancelingError';
 import {UnknownUserError} from '@fluxer/errors/src/domains/user/UnknownUserError';
-import type {CurrentSubscriptionPriceResponse} from '@fluxer/schema/src/domains/premium/PremiumSchemas';
+import type {
+	CurrentSubscriptionPriceResponse,
+	SwitchToListPriceResponse,
+} from '@fluxer/schema/src/domains/premium/PremiumSchemas';
 import type {ICacheService} from '@pkgs/cache/src/ICacheService';
 import {seconds} from 'itty-time';
 import type Stripe from 'stripe';
@@ -25,7 +28,7 @@ import type {User} from '../../models/User';
 import type {IUserRepository} from '../../user/IUserRepository';
 import {mapUserToPrivateResponse} from '../../user/UserMappers';
 import type {Currency} from '../../utils/CurrencyUtils';
-import type {RecurringBillingCycle} from '../ProductRegistry';
+import type {ProductInfo, RecurringBillingCycle} from '../ProductRegistry';
 import {
 	getPrimarySubscriptionItem,
 	getSubscriptionEntitlementPeriodEndUnix,
@@ -36,12 +39,80 @@ import {extractId} from '../StripeUtils';
 
 type BillingCycleChangeEffectiveAt = 'now' | 'period_end';
 
+const CHARGEABLE_SUBSCRIPTION_STATUSES = new Set<Stripe.Subscription.Status>(['active', 'trialing']);
+
+function mapStripeIds(values: Array<string | {id: string}> | null | undefined): Array<string> | null {
+	const ids = (values ?? []).map((value) => extractId(value)).filter((id): id is string => id !== null);
+	return ids.length > 0 ? ids : null;
+}
+
+function mapSchedulePhaseDiscounts(
+	discounts:
+		| Array<{
+				coupon: string | {id: string} | null;
+				discount: unknown;
+				promotion_code: string | {id: string} | null;
+		  }>
+		| null
+		| undefined,
+): Array<Stripe.SubscriptionScheduleUpdateParams.Phase.Discount> | null {
+	const mapped = (discounts ?? [])
+		.map((discount): Stripe.SubscriptionScheduleUpdateParams.Phase.Discount | null => {
+			const coupon = extractId(discount.coupon);
+			if (coupon) {
+				return {coupon};
+			}
+			const promotionCode = extractId(discount.promotion_code);
+			if (promotionCode) {
+				return {promotion_code: promotionCode};
+			}
+			return typeof discount.discount === 'string' ? {discount: discount.discount} : null;
+		})
+		.filter((discount): discount is Stripe.SubscriptionScheduleUpdateParams.Phase.Discount => discount !== null);
+	return mapped.length > 0 ? mapped : null;
+}
+
+function mapSchedulePhaseAddInvoiceItems(
+	addInvoiceItems: Array<Stripe.SubscriptionSchedule.Phase.AddInvoiceItem> | null | undefined,
+): Array<Stripe.SubscriptionScheduleUpdateParams.Phase.AddInvoiceItem> | null {
+	const mapped = (addInvoiceItems ?? [])
+		.map((addInvoiceItem) => {
+			const price = extractId(addInvoiceItem.price);
+			if (!price) {
+				return null;
+			}
+			const mappedItem: Stripe.SubscriptionScheduleUpdateParams.Phase.AddInvoiceItem = {
+				price,
+				quantity: addInvoiceItem.quantity ?? 1,
+				period: addInvoiceItem.period,
+			};
+			const taxRates = mapStripeIds(addInvoiceItem.tax_rates);
+			if (taxRates) {
+				mappedItem.tax_rates = taxRates;
+			}
+			const discounts = mapSchedulePhaseDiscounts(addInvoiceItem.discounts);
+			if (discounts) {
+				mappedItem.discounts = discounts;
+			}
+			if (addInvoiceItem.metadata) {
+				mappedItem.metadata = addInvoiceItem.metadata;
+			}
+			return mappedItem;
+		})
+		.filter(
+			(addInvoiceItem): addInvoiceItem is Stripe.SubscriptionScheduleUpdateParams.Phase.AddInvoiceItem =>
+				addInvoiceItem !== null,
+		);
+	return mapped.length > 0 ? mapped : null;
+}
+
 export class StripeSubscriptionService {
 	constructor(
 		private stripe: Stripe | null,
 		private userRepository: IUserRepository,
 		private productRegistry: {
 			getRecurringSubscriptionPriceId: (billingCycle: RecurringBillingCycle, currency: string) => string | null;
+			getProduct: (priceId: string) => ProductInfo | null;
 		},
 		private cacheService: ICacheService,
 		private gatewayService: IGatewayService,
@@ -251,7 +322,7 @@ export class StripeSubscriptionService {
 				return;
 			}
 			await this.stripe.subscriptionSchedules.release(schedule.id, {
-				preserve_cancel_date: false,
+				preserve_cancel_date: Boolean(subscription.cancel_at || subscription.cancel_at_period_end),
 			});
 			const releasedSubscription = await this.stripe.subscriptions.retrieve(subscription.id, {
 				expand: ['items.data.price'],
@@ -268,7 +339,7 @@ export class StripeSubscriptionService {
 				);
 			}
 			const patch: Record<string, unknown> = {
-				premium_will_cancel: false,
+				premium_will_cancel: Boolean(releasedSubscription.cancel_at || releasedSubscription.cancel_at_period_end),
 			};
 			const computedPremiumUntil = getSubscriptionPremiumPeriodEnd(releasedSubscription);
 			if (computedPremiumUntil) {
@@ -433,6 +504,142 @@ export class StripeSubscriptionService {
 		}
 	}
 
+	async switchToCurrentListPrice(userId: UserID): Promise<SwitchToListPriceResponse> {
+		if (!this.stripe) {
+			throw new StripePaymentNotAvailableError();
+		}
+		const user = await this.userRepository.findUnique(userId);
+		if (!user) {
+			throw new UnknownUserError();
+		}
+		if (!user.stripeSubscriptionId) {
+			throw new StripeNoActiveSubscriptionError();
+		}
+		const lockKey = `list_price_switch_lock:${user.id}`;
+		const lockToken = await this.cacheService.acquireLock(
+			lockKey,
+			StripeSubscriptionService.LIST_PRICE_SWITCH_LOCK_TTL_SECONDS,
+		);
+		if (!lockToken) {
+			Logger.debug(
+				{userId, subscriptionId: user.stripeSubscriptionId, lockKey},
+				'List price switch skipped because another switch is already in flight',
+			);
+			return {status: 'ineligible', reason: 'switch_in_progress'};
+		}
+		try {
+			const subscription = await this.stripe.subscriptions.retrieve(user.stripeSubscriptionId, {
+				expand: ['items.data.price', 'schedule'],
+			});
+			const item = getPrimarySubscriptionItem(subscription);
+			if (!item?.id || !item.price?.recurring || !item.price.currency || item.price.unit_amount == null) {
+				return {status: 'ineligible', reason: 'unsupported_subscription'};
+			}
+			if (!CHARGEABLE_SUBSCRIPTION_STATUSES.has(subscription.status)) {
+				return {status: 'ineligible', reason: 'subscription_not_chargeable'};
+			}
+			if (subscription.cancel_at != null || subscription.cancel_at_period_end) {
+				return {status: 'ineligible', reason: 'subscription_cancelling'};
+			}
+			const billingCycle = this.getBillingCycleFromInterval(item.price.recurring.interval);
+			if (!billingCycle) {
+				return {status: 'ineligible', reason: 'unsupported_subscription'};
+			}
+			const currency = item.price.currency.toUpperCase() as Currency;
+			const targetPriceId = this.productRegistry.getRecurringSubscriptionPriceId(billingCycle, currency);
+			if (!targetPriceId) {
+				return {status: 'ineligible', reason: 'no_list_price'};
+			}
+			if (targetPriceId === item.price.id) {
+				return {status: 'ineligible', reason: 'already_on_list_price'};
+			}
+			const targetProduct = this.productRegistry.getProduct(targetPriceId);
+			if (!targetProduct || targetProduct.currency !== currency) {
+				return {status: 'ineligible', reason: 'no_list_price'};
+			}
+			const targetAmountMinor = await this.getListPriceAmountMinor(targetPriceId);
+			const currentAmountMinor = item.price.unit_amount;
+			if (targetAmountMinor == null) {
+				return {status: 'ineligible', reason: 'no_list_price'};
+			}
+			if (targetAmountMinor >= currentAmountMinor) {
+				return {status: 'ineligible', reason: 'not_a_price_decrease'};
+			}
+			const periodEnd = getSubscriptionEntitlementPeriodEndUnix(subscription, item);
+			if (!periodEnd || periodEnd <= Math.floor(Date.now() / 1000)) {
+				return {status: 'ineligible', reason: 'missing_period_end'};
+			}
+			const switched = {
+				effective_at: new Date(periodEnd * 1000).toISOString(),
+				target_price_id: targetPriceId,
+				target_amount_minor: targetAmountMinor,
+				current_amount_minor: currentAmountMinor,
+				currency,
+			};
+			const schedule = await this.loadSubscriptionSchedule(subscription.schedule);
+			const pendingSchedule =
+				schedule && (schedule.status === 'active' || schedule.status === 'not_started') ? schedule : null;
+			if (pendingSchedule) {
+				if (this.subscriptionScheduleHasFutureTargetPrice(pendingSchedule, targetPriceId)) {
+					Logger.debug(
+						{userId, subscriptionId: subscription.id, scheduleId: pendingSchedule.id, targetPriceId},
+						'List price switch already scheduled for period end',
+					);
+					return {status: 'already_scheduled', ...switched};
+				}
+				if (pendingSchedule.end_behavior === 'cancel') {
+					return {status: 'ineligible', reason: 'cancellation_managed_by_schedule'};
+				}
+				if (this.subscriptionScheduleHasPendingBillingCycleChange(pendingSchedule, subscription)) {
+					return {status: 'ineligible', reason: 'conflicting_pending_change'};
+				}
+			}
+			await this.scheduleBillingCycleChangeAtPeriodEnd({
+				user,
+				subscription,
+				item,
+				currentBillingCycle: billingCycle,
+				targetBillingCycle: billingCycle,
+				targetPriceId,
+				clearCancellation: false,
+			});
+			Logger.debug(
+				{
+					userId,
+					subscriptionId: subscription.id,
+					billingCycle,
+					currency,
+					currentPriceId: item.price.id,
+					targetPriceId,
+					currentAmountMinor,
+					targetAmountMinor,
+					periodEnd,
+				},
+				'Subscription switch to current list price scheduled for period end',
+			);
+			return {status: 'scheduled', ...switched};
+		} catch (error: unknown) {
+			Logger.error(
+				{error, userId, subscriptionId: user.stripeSubscriptionId},
+				'Failed to switch subscription to the current list price',
+			);
+			if (error instanceof StripeError || error instanceof StripeInvalidProductConfigurationError) {
+				throw error;
+			}
+			const message = error instanceof Error ? error.message : 'Failed to switch subscription to the list price';
+			throw new StripeError(message);
+		} finally {
+			try {
+				const released = await this.cacheService.releaseLock(lockKey, lockToken);
+				if (!released) {
+					Logger.warn({userId, lockKey}, 'List price switch lock token no longer matched on release');
+				}
+			} catch (error) {
+				Logger.error({error, userId, lockKey}, 'Failed to release list price switch lock');
+			}
+		}
+	}
+
 	private async scheduleBillingCycleChangeAtPeriodEnd({
 		user,
 		subscription,
@@ -440,6 +647,7 @@ export class StripeSubscriptionService {
 		currentBillingCycle,
 		targetBillingCycle,
 		targetPriceId,
+		clearCancellation = true,
 	}: {
 		user: User;
 		subscription: Stripe.Subscription;
@@ -447,6 +655,7 @@ export class StripeSubscriptionService {
 		currentBillingCycle: RecurringBillingCycle;
 		targetBillingCycle: RecurringBillingCycle;
 		targetPriceId: string;
+		clearCancellation?: boolean;
 	}): Promise<void> {
 		if (!this.stripe) {
 			throw new StripePaymentNotAvailableError();
@@ -456,7 +665,7 @@ export class StripeSubscriptionService {
 			throw new StripeError('Subscription is missing a future period end for scheduled billing cycle change');
 		}
 		let currentSubscription = subscription;
-		if (subscription.cancel_at || subscription.cancel_at_period_end) {
+		if (clearCancellation && (subscription.cancel_at || subscription.cancel_at_period_end)) {
 			currentSubscription = await this.stripe.subscriptions.update(
 				subscription.id,
 				this.getClearCancellationUpdateParams(subscription) ?? {proration_behavior: 'none'},
@@ -491,7 +700,6 @@ export class StripeSubscriptionService {
 			firstInvoiceCredit?.price_data?.unit_amount != null ? -firstInvoiceCredit.price_data.unit_amount : null;
 		const targetPhase: Stripe.SubscriptionScheduleUpdateParams.Phase = {
 			start_date: periodEnd,
-			billing_cycle_anchor: 'phase_start',
 			items: [
 				{
 					price: targetPriceId,
@@ -500,6 +708,9 @@ export class StripeSubscriptionService {
 			],
 			proration_behavior: 'none',
 		};
+		if (currentBillingCycle !== targetBillingCycle) {
+			targetPhase.billing_cycle_anchor = 'phase_start';
+		}
 		if (firstInvoiceCredit) {
 			targetPhase.add_invoice_items = [firstInvoiceCredit];
 			targetPhase.metadata = {
@@ -508,7 +719,7 @@ export class StripeSubscriptionService {
 			};
 		}
 		await this.stripe.subscriptionSchedules.update(schedule.id, {
-			end_behavior: 'release',
+			end_behavior: clearCancellation ? 'release' : schedule.end_behavior,
 			proration_behavior: 'none',
 			metadata: {
 				user_id: user.id.toString(),
@@ -516,14 +727,33 @@ export class StripeSubscriptionService {
 			},
 			phases: [currentPhase, targetPhase],
 		});
+		let scheduledSubscription = currentSubscription;
+		if (!clearCancellation) {
+			scheduledSubscription = await this.stripe.subscriptions.retrieve(currentSubscription.id, {
+				expand: ['items.data.price'],
+			});
+			try {
+				await getBillingRepository().subscriptions.upsertFromStripe(scheduledSubscription, {
+					knownUserId: user.id,
+					snapshotCapturedAt: new Date(),
+				});
+			} catch (mirrorErr) {
+				Logger.error(
+					{mirrorErr, subId: scheduledSubscription.id},
+					'Mirror upsert failed after scheduling a period-end price change; reconciler will heal',
+				);
+			}
+		}
 		const patch: Record<string, unknown> = {
-			premium_will_cancel: false,
+			premium_will_cancel: clearCancellation
+				? false
+				: Boolean(scheduledSubscription.cancel_at || scheduledSubscription.cancel_at_period_end),
 		};
-		const computedPremiumUntil = getSubscriptionPremiumPeriodEnd(currentSubscription);
+		const computedPremiumUntil = getSubscriptionPremiumPeriodEnd(scheduledSubscription);
 		if (computedPremiumUntil) {
 			patch['premium_until'] = computedPremiumUntil;
 		}
-		const updatedCustomerId = extractId(currentSubscription.customer);
+		const updatedCustomerId = extractId(scheduledSubscription.customer);
 		if (updatedCustomerId && updatedCustomerId !== user.stripeCustomerId) {
 			patch['stripe_customer_id'] = updatedCustomerId;
 		}
@@ -532,7 +762,7 @@ export class StripeSubscriptionService {
 		Logger.debug(
 			{
 				userId: user.id,
-				subscriptionId: currentSubscription.id,
+				subscriptionId: scheduledSubscription.id,
 				scheduleId: schedule.id,
 				fromBillingCycle: currentBillingCycle,
 				toBillingCycle: targetBillingCycle,
@@ -742,12 +972,28 @@ export class StripeSubscriptionService {
 					if (!price) {
 						return null;
 					}
-					return {
+					const mappedItem: Stripe.SubscriptionScheduleUpdateParams.Phase.Item = {
 						price,
 						quantity: phaseItem.quantity ?? 1,
 					};
+					const itemTaxRates = mapStripeIds(phaseItem.tax_rates);
+					if (itemTaxRates) {
+						mappedItem.tax_rates = itemTaxRates;
+					}
+					const itemDiscounts = mapSchedulePhaseDiscounts(phaseItem.discounts);
+					if (itemDiscounts) {
+						mappedItem.discounts = itemDiscounts;
+					}
+					if (phaseItem.metadata) {
+						mappedItem.metadata = phaseItem.metadata;
+					}
+					if (phaseItem.billing_thresholds?.usage_gte != null) {
+						mappedItem.billing_thresholds = {usage_gte: phaseItem.billing_thresholds.usage_gte};
+					}
+					return mappedItem;
 				})
-				.filter((phaseItem): phaseItem is {price: string; quantity: number} => phaseItem !== null) ?? [];
+				.filter((phaseItem): phaseItem is Stripe.SubscriptionScheduleUpdateParams.Phase.Item => phaseItem !== null) ??
+			[];
 		const currentPhase: Stripe.SubscriptionScheduleUpdateParams.Phase = {
 			start_date: phase?.start_date ?? subscription.start_date ?? subscription.created,
 			end_date: periodEnd,
@@ -762,6 +1008,99 @@ export class StripeSubscriptionService {
 						],
 			proration_behavior: 'none',
 		};
+		if (phase) {
+			const phaseDiscounts = mapSchedulePhaseDiscounts(phase.discounts);
+			if (phaseDiscounts) {
+				currentPhase.discounts = phaseDiscounts;
+			}
+			const defaultTaxRates = mapStripeIds(phase.default_tax_rates);
+			if (defaultTaxRates) {
+				currentPhase.default_tax_rates = defaultTaxRates;
+			}
+			if (phase.metadata) {
+				currentPhase.metadata = phase.metadata;
+			}
+			if (phase.currency) {
+				currentPhase.currency = phase.currency;
+			}
+			if (phase.description != null) {
+				currentPhase.description = phase.description;
+			}
+			if (phase.collection_method) {
+				currentPhase.collection_method = phase.collection_method;
+			}
+			if (phase.application_fee_percent != null) {
+				currentPhase.application_fee_percent = phase.application_fee_percent;
+			}
+			const defaultPaymentMethod = extractId(phase.default_payment_method);
+			if (defaultPaymentMethod) {
+				currentPhase.default_payment_method = defaultPaymentMethod;
+			}
+			const onBehalfOf = extractId(phase.on_behalf_of);
+			if (onBehalfOf) {
+				currentPhase.on_behalf_of = onBehalfOf;
+			}
+			if (phase.automatic_tax) {
+				const automaticTax: Stripe.SubscriptionScheduleUpdateParams.Phase.AutomaticTax = {
+					enabled: phase.automatic_tax.enabled,
+				};
+				if (phase.automatic_tax.liability) {
+					automaticTax.liability = {type: phase.automatic_tax.liability.type};
+					const liabilityAccount = extractId(phase.automatic_tax.liability.account);
+					if (liabilityAccount) {
+						automaticTax.liability.account = liabilityAccount;
+					}
+				}
+				currentPhase.automatic_tax = automaticTax;
+			}
+			if (phase.invoice_settings) {
+				const invoiceSettings: Stripe.SubscriptionScheduleUpdateParams.Phase.InvoiceSettings = {};
+				const accountTaxIds = mapStripeIds(phase.invoice_settings.account_tax_ids);
+				if (accountTaxIds) {
+					invoiceSettings.account_tax_ids = accountTaxIds;
+				}
+				if (phase.invoice_settings.days_until_due != null) {
+					invoiceSettings.days_until_due = phase.invoice_settings.days_until_due;
+				}
+				if (phase.invoice_settings.issuer) {
+					invoiceSettings.issuer = {type: phase.invoice_settings.issuer.type};
+					const issuerAccount = extractId(phase.invoice_settings.issuer.account);
+					if (issuerAccount) {
+						invoiceSettings.issuer.account = issuerAccount;
+					}
+				}
+				if (Object.keys(invoiceSettings).length > 0) {
+					currentPhase.invoice_settings = invoiceSettings;
+				}
+			}
+			if (phase.billing_thresholds) {
+				const billingThresholds: Stripe.SubscriptionScheduleUpdateParams.Phase.BillingThresholds = {};
+				if (phase.billing_thresholds.amount_gte != null) {
+					billingThresholds.amount_gte = phase.billing_thresholds.amount_gte;
+				}
+				if (phase.billing_thresholds.reset_billing_cycle_anchor != null) {
+					billingThresholds.reset_billing_cycle_anchor = phase.billing_thresholds.reset_billing_cycle_anchor;
+				}
+				if (Object.keys(billingThresholds).length > 0) {
+					currentPhase.billing_thresholds = billingThresholds;
+				}
+			}
+			if (phase.transfer_data) {
+				const destination = extractId(phase.transfer_data.destination);
+				if (destination) {
+					currentPhase.transfer_data = {destination};
+					if (phase.transfer_data.amount_percent != null) {
+						currentPhase.transfer_data.amount_percent = phase.transfer_data.amount_percent;
+					}
+				}
+			}
+			if (phase.start_date > now) {
+				const addInvoiceItems = mapSchedulePhaseAddInvoiceItems(phase.add_invoice_items);
+				if (addInvoiceItems) {
+					currentPhase.add_invoice_items = addInvoiceItems;
+				}
+			}
+		}
 		const trialEnd = subscription.trial_end;
 		if (trialEnd != null && trialEnd > now) {
 			if (trialEnd >= periodEnd) {
@@ -770,6 +1109,10 @@ export class StripeSubscriptionService {
 				currentPhase.trial_end = trialEnd;
 			}
 		}
+		const phaseIsTrial = currentPhase.trial === true || currentPhase.trial_end != null;
+		if (phase?.billing_cycle_anchor && !(phaseIsTrial && phase.billing_cycle_anchor === 'phase_start')) {
+			currentPhase.billing_cycle_anchor = phase.billing_cycle_anchor;
+		}
 		return currentPhase;
 	}
 
@@ -1026,6 +1369,7 @@ export class StripeSubscriptionService {
 	private static readonly CURRENT_PRICE_CACHE_TTL_SECONDS = seconds('5 minutes');
 	private static readonly LIST_PRICE_CACHE_TTL_SECONDS = seconds('1 hour');
 	private static readonly PRICE_CACHE_PRODUCE_TIMEOUT_MS = 90000;
+	private static readonly LIST_PRICE_SWITCH_LOCK_TTL_SECONDS = seconds('30 seconds');
 	private static readonly USER_TRIAL_LOCK_TTL_SECONDS = seconds('30 seconds');
 	private static readonly USER_TRIAL_LOCK_MAX_WAIT_MS = 15000;
 	private static readonly USER_TRIAL_LOCK_RETRY_DELAY_MS = 100;

fluxer_api/src/api/stripe/services/StripeSubscriptionWebhookHandler.ts

@@ -65,6 +65,14 @@ export class StripeSubscriptionWebhookHandler {
 			Logger.error({invoiceId: invoice.id, billingReason}, 'No subscription ID found in subscription invoice');
 			throw new StripeError('Invoice missing subscription id');
 		}
+		const donor = await this.donationRepository.findDonorByStripeSubscriptionId(subscriptionId);
+		if (donor) {
+			Logger.debug(
+				{invoiceId: invoice.id, eventId, subscriptionId, donorEmail: donor.email},
+				'Skipping invoice payment for donation subscription',
+			);
+			return;
+		}
 		if (this.isSubscriptionUpdateInvoice(invoice)) {
 			Logger.debug(
 				{

fluxer_api/src/api/stripe/services/StripeWebhookService.ts

@@ -309,6 +309,10 @@ export class StripeWebhookService {
 				await this.safeMirrorUpsert(event, () => this.billingRepository.paymentMethods.markDetached(pm.id, new Date()));
 				break;
 			}
+			case 'mandate.updated': {
+				await this.handleMandateUpdated(event.data.object as Stripe.Mandate);
+				break;
+			}
 			case 'payment_intent.created':
 			case 'payment_intent.processing':
 			case 'payment_intent.succeeded':
@@ -369,6 +373,18 @@ export class StripeWebhookService {
 		}
 	}
 
+	private async handleMandateUpdated(mandate: Stripe.Mandate): Promise<void> {
+		if (mandate.status !== 'inactive') {
+			return;
+		}
+		const paymentMethodId =
+			typeof mandate.payment_method === 'string' ? mandate.payment_method : (mandate.payment_method?.id ?? null);
+		Logger.warn(
+			{mandateId: mandate.id, paymentMethodId, status: mandate.status},
+			'Stripe mandate is no longer active; recurring payments on this payment method will fail',
+		);
+	}
+
 	private async resolveRefundCustomerId(refund: Stripe.Refund): Promise<string | null> {
 		const chargeId = typeof refund.charge === 'string' ? refund.charge : (refund.charge?.id ?? null);
 		if (chargeId !== null) {

fluxer_api/src/api/stripe/tests/ProductRegistryLegacyPrices.test.ts

@@ -0,0 +1,370 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {UserPremiumTypes} from '@fluxer/constants/src/UserConstants';
+import {afterAll, beforeAll, describe, expect, test} from 'vitest';
+import {Config} from '../../Config';
+import {ProductRegistry, ProductType} from '../ProductRegistry';
+
+// Mirrors the live BRL/TRY configuration after the repricing: the BRL slots point at the new list
+// prices, TRY is not configured at all (production has no TRY prices), and every retired price id
+// lives only in the legacy map.
+const MOCK_PRICES = {
+	monthlyUsd: 'price_monthly_usd',
+	monthlyBrl: 'price_1TMbqsFPC94Os7FdfElrIIaZ',
+	yearlyUsd: 'price_yearly_usd',
+	yearlyBrl: 'price_1TMbqtFPC94Os7Fd7VJqmDyt',
+	gift1MonthBrl: 'price_gift_1_month_brl',
+	gift1YearBrl: 'price_gift_1_year_brl',
+};
+
+const LEGACY_MONTHLY_BRL = 'price_legacy_monthly_brl';
+const LEGACY_YEARLY_BRL = 'price_legacy_yearly_brl';
+const LEGACY_GIFT_1_MONTH_BRL = 'price_legacy_gift_1_month_brl';
+const LEGACY_GIFT_1_YEAR_BRL = 'price_legacy_gift_1_year_brl';
+const LEGACY_MONTHLY_TRY = 'price_1TMYpdFPC94Os7FdZVRx98Up';
+
+const MOCK_LEGACY_PRICES: Record<string, Array<string> | undefined> = {
+	monthly_brl: [LEGACY_MONTHLY_BRL],
+	yearly_brl: [LEGACY_YEARLY_BRL],
+	gift_1_month_brl: [LEGACY_GIFT_1_MONTH_BRL],
+	gift_1_year_brl: [LEGACY_GIFT_1_YEAR_BRL],
+	monthly_try: [LEGACY_MONTHLY_TRY],
+};
+
+describe('ProductRegistry - legacy prices', () => {
+	let originalPrices: typeof Config.stripe.prices | undefined;
+	let originalLegacyPrices: typeof Config.stripe.legacyPrices | undefined;
+
+	beforeAll(() => {
+		originalPrices = Config.stripe.prices;
+		originalLegacyPrices = Config.stripe.legacyPrices;
+	});
+
+	afterAll(() => {
+		Config.stripe.prices = originalPrices;
+		Config.stripe.legacyPrices = originalLegacyPrices;
+	});
+
+	function buildRegistry(
+		prices: typeof Config.stripe.prices,
+		legacyPrices: typeof Config.stripe.legacyPrices,
+	): ProductRegistry {
+		Config.stripe.prices = prices;
+		Config.stripe.legacyPrices = legacyPrices;
+		return new ProductRegistry();
+	}
+
+	describe('slot shapes', () => {
+		test('a legacy monthly slot resolves to a monthly recurring product in its currency', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+			expect(registry.getProduct(LEGACY_MONTHLY_BRL)).toEqual({
+				type: ProductType.MONTHLY_SUBSCRIPTION,
+				premiumType: UserPremiumTypes.SUBSCRIPTION,
+				durationMonths: 1,
+				isGift: false,
+				currency: 'BRL',
+				billingCycle: 'monthly',
+			});
+		});
+
+		test('a legacy yearly slot resolves to a yearly recurring product in its currency', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+			expect(registry.getProduct(LEGACY_YEARLY_BRL)).toEqual({
+				type: ProductType.YEARLY_SUBSCRIPTION,
+				premiumType: UserPremiumTypes.SUBSCRIPTION,
+				durationMonths: 12,
+				isGift: false,
+				currency: 'BRL',
+				billingCycle: 'yearly',
+			});
+		});
+
+		test('a legacy gift_1_month slot resolves to a one-month gift with no billing cycle', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+			const info = registry.getProduct(LEGACY_GIFT_1_MONTH_BRL);
+			expect(info).toEqual({
+				type: ProductType.GIFT_1_MONTH,
+				premiumType: UserPremiumTypes.SUBSCRIPTION,
+				durationMonths: 1,
+				isGift: true,
+				currency: 'BRL',
+			});
+			expect(info?.billingCycle).toBeUndefined();
+		});
+
+		test('a legacy gift_1_year slot resolves to a one-year gift with no billing cycle', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+			const info = registry.getProduct(LEGACY_GIFT_1_YEAR_BRL);
+			expect(info).toEqual({
+				type: ProductType.GIFT_1_YEAR,
+				premiumType: UserPremiumTypes.SUBSCRIPTION,
+				durationMonths: 12,
+				isGift: true,
+				currency: 'BRL',
+			});
+			expect(info?.billingCycle).toBeUndefined();
+		});
+
+		test('the currency comes from the slot suffix, not from the price id', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+			// Same shape of id, different slot: only the slot suffix decides the currency.
+			expect(registry.getProduct(LEGACY_MONTHLY_TRY)?.currency).toBe('TRY');
+			expect(registry.getProduct(LEGACY_MONTHLY_BRL)?.currency).toBe('BRL');
+		});
+
+		test('every supported currency suffix is recognised', () => {
+			const registry = buildRegistry(
+				{},
+				{
+					monthly_usd: ['legacy_usd'],
+					monthly_eur: ['legacy_eur'],
+					monthly_brl: ['legacy_brl'],
+					monthly_inr: ['legacy_inr'],
+					monthly_pln: ['legacy_pln'],
+					monthly_try: ['legacy_try'],
+				},
+			);
+			expect(registry.getProduct('legacy_usd')?.currency).toBe('USD');
+			expect(registry.getProduct('legacy_eur')?.currency).toBe('EUR');
+			expect(registry.getProduct('legacy_brl')?.currency).toBe('BRL');
+			expect(registry.getProduct('legacy_inr')?.currency).toBe('INR');
+			expect(registry.getProduct('legacy_pln')?.currency).toBe('PLN');
+			expect(registry.getProduct('legacy_try')?.currency).toBe('TRY');
+		});
+
+		test('an uppercased currency suffix is still recognised', () => {
+			const registry = buildRegistry({}, {monthly_BRL: ['legacy_upper_brl']});
+			expect(registry.getProduct('legacy_upper_brl')?.currency).toBe('BRL');
+		});
+
+		test('a slot may retire more than one price id', () => {
+			const registry = buildRegistry({}, {monthly_brl: ['legacy_one', 'legacy_two', 'legacy_three']});
+			expect(registry.getProduct('legacy_one')?.type).toBe(ProductType.MONTHLY_SUBSCRIPTION);
+			expect(registry.getProduct('legacy_two')?.type).toBe(ProductType.MONTHLY_SUBSCRIPTION);
+			expect(registry.getProduct('legacy_three')?.type).toBe(ProductType.MONTHLY_SUBSCRIPTION);
+		});
+
+		test('legacy prices register even when no prices are configured at all', () => {
+			const registry = buildRegistry(undefined, MOCK_LEGACY_PRICES);
+			expect(registry.getProduct(LEGACY_MONTHLY_BRL)?.type).toBe(ProductType.MONTHLY_SUBSCRIPTION);
+			expect(registry.getProduct(MOCK_PRICES.monthlyBrl)).toBeNull();
+		});
+
+		test('an unknown price id still resolves to null', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+			expect(registry.getProduct('price_never_seen')).toBeNull();
+		});
+	});
+
+	describe('honoured but unpurchasable', () => {
+		test('a legacy recurring price resolves through getProduct but is never the checkout price', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+
+			// Direction 1: the retired price is honoured on renewal.
+			expect(registry.getProduct(LEGACY_MONTHLY_BRL)).not.toBeNull();
+			expect(registry.getProduct(LEGACY_YEARLY_BRL)).not.toBeNull();
+
+			// Direction 2: checkout only ever offers the authored list price.
+			expect(registry.getRecurringSubscriptionPriceId('monthly', 'BRL')).toBe(MOCK_PRICES.monthlyBrl);
+			expect(registry.getRecurringSubscriptionPriceId('monthly', 'BRL')).not.toBe(LEGACY_MONTHLY_BRL);
+			expect(registry.getRecurringSubscriptionPriceId('yearly', 'BRL')).toBe(MOCK_PRICES.yearlyBrl);
+			expect(registry.getRecurringSubscriptionPriceId('yearly', 'BRL')).not.toBe(LEGACY_YEARLY_BRL);
+		});
+
+		test('a legacy gift price resolves through getProduct but is never the gift checkout price', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+
+			expect(registry.getProduct(LEGACY_GIFT_1_MONTH_BRL)).not.toBeNull();
+			expect(registry.getProduct(LEGACY_GIFT_1_YEAR_BRL)).not.toBeNull();
+
+			expect(registry.getGiftPriceId('gift_1_month', 'BRL')).toBe(MOCK_PRICES.gift1MonthBrl);
+			expect(registry.getGiftPriceId('gift_1_month', 'BRL')).not.toBe(LEGACY_GIFT_1_MONTH_BRL);
+			expect(registry.getGiftPriceId('gift_1_year', 'BRL')).toBe(MOCK_PRICES.gift1YearBrl);
+			expect(registry.getGiftPriceId('gift_1_year', 'BRL')).not.toBe(LEGACY_GIFT_1_YEAR_BRL);
+		});
+
+		test('an archived price in a currency the instance does not configure renews but cannot be bought', () => {
+			// The real production case: one live subscription sits on an archived TRY price that
+			// production never configured. getProduct must resolve it; checkout must still refuse TRY.
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+
+			expect(registry.getProduct(LEGACY_MONTHLY_TRY)).toEqual({
+				type: ProductType.MONTHLY_SUBSCRIPTION,
+				premiumType: UserPremiumTypes.SUBSCRIPTION,
+				durationMonths: 1,
+				isGift: false,
+				currency: 'TRY',
+				billingCycle: 'monthly',
+			});
+			expect(registry.getRecurringSubscriptionPriceId('monthly', 'TRY')).toBeNull();
+			expect(registry.getRecurringSubscriptionPriceId('yearly', 'TRY')).toBeNull();
+			expect(registry.getGiftPriceId('gift_1_month', 'TRY')).toBeNull();
+			expect(registry.getGiftPriceId('gift_1_year', 'TRY')).toBeNull();
+		});
+
+		test('no legacy price id is ever returned by either price getter, for any cycle or currency', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+			const legacyIds = new Set(Object.values(MOCK_LEGACY_PRICES).flatMap((ids) => ids ?? []));
+			const currencies = ['USD', 'EUR', 'BRL', 'INR', 'PLN', 'TRY'];
+
+			const offered: Array<string> = [];
+			for (const currency of currencies) {
+				for (const cycle of ['monthly', 'yearly'] as const) {
+					const priceId = registry.getRecurringSubscriptionPriceId(cycle, currency);
+					if (priceId) offered.push(priceId);
+				}
+				for (const duration of ['gift_1_month', 'gift_1_year'] as const) {
+					const priceId = registry.getGiftPriceId(duration, currency);
+					if (priceId) offered.push(priceId);
+				}
+			}
+
+			expect(offered.length).toBeGreaterThan(0);
+			expect(offered.filter((priceId) => legacyIds.has(priceId))).toEqual([]);
+			// And every legacy id is still honoured by the registry.
+			for (const legacyId of legacyIds) {
+				expect(registry.getProduct(legacyId)).not.toBeNull();
+			}
+		});
+
+		test('a legacy recurring product is still classified as a recurring subscription', () => {
+			const registry = buildRegistry(MOCK_PRICES, MOCK_LEGACY_PRICES);
+			const recurring = registry.getProduct(LEGACY_MONTHLY_BRL);
+			const gift = registry.getProduct(LEGACY_GIFT_1_YEAR_BRL);
+			expect(recurring).not.toBeNull();
+			expect(gift).not.toBeNull();
+			expect(registry.isRecurringSubscription(recurring!)).toBe(true);
+			expect(registry.isRecurringSubscription(gift!)).toBe(false);
+		});
+	});
+
+	describe('precedence', () => {
+		test('an authored price wins over a legacy entry claiming the same id', () => {
+			// Deliberate collision: the live monthly BRL list price is also listed as a retired yearly
+			// USD price. The authored ProductInfo must survive.
+			const registry = buildRegistry(MOCK_PRICES, {
+				yearly_usd: [MOCK_PRICES.monthlyBrl],
+			});
+			expect(registry.getProduct(MOCK_PRICES.monthlyBrl)).toEqual({
+				type: ProductType.MONTHLY_SUBSCRIPTION,
+				premiumType: UserPremiumTypes.SUBSCRIPTION,
+				durationMonths: 1,
+				isGift: false,
+				currency: 'BRL',
+				billingCycle: 'monthly',
+			});
+		});
+
+		test('an authored gift price wins over a legacy entry claiming the same id', () => {
+			const registry = buildRegistry(MOCK_PRICES, {
+				monthly_try: [MOCK_PRICES.gift1YearBrl],
+			});
+			expect(registry.getProduct(MOCK_PRICES.gift1YearBrl)).toEqual({
+				type: ProductType.GIFT_1_YEAR,
+				premiumType: UserPremiumTypes.SUBSCRIPTION,
+				durationMonths: 12,
+				isGift: true,
+				currency: 'BRL',
+			});
+		});
+
+		test('the first legacy slot to claim an id wins over a later one', () => {
+			const registry = buildRegistry(
+				{},
+				{
+					monthly_brl: ['legacy_shared'],
+					yearly_usd: ['legacy_shared'],
+				},
+			);
+			expect(registry.getProduct('legacy_shared')).toEqual({
+				type: ProductType.MONTHLY_SUBSCRIPTION,
+				premiumType: UserPremiumTypes.SUBSCRIPTION,
+				durationMonths: 1,
+				isGift: false,
+				currency: 'BRL',
+				billingCycle: 'monthly',
+			});
+		});
+	});
+
+	describe('malformed configuration', () => {
+		test('a slot whose value is a bare string is ignored and the rest still registers', () => {
+			const registry = buildRegistry(MOCK_PRICES, {
+				monthly_brl: 'price_legacy_bare_string' as unknown as Array<string>,
+				yearly_brl: [LEGACY_YEARLY_BRL],
+			});
+			expect(registry.getProduct('price_legacy_bare_string')).toBeNull();
+			// Not accidentally registered character by character either.
+			expect(registry.getProduct('p')).toBeNull();
+			expect(registry.getProduct(LEGACY_YEARLY_BRL)?.type).toBe(ProductType.YEARLY_SUBSCRIPTION);
+		});
+
+		test('a slot with an unrecognised name is ignored and the rest still registers', () => {
+			const registry = buildRegistry(MOCK_PRICES, {
+				weekly_brl: ['legacy_weekly'],
+				visionary_usd: ['legacy_visionary'],
+				brl: ['legacy_no_separator'],
+				_brl: ['legacy_leading_separator'],
+				yearly_brl: [LEGACY_YEARLY_BRL],
+			});
+			expect(registry.getProduct('legacy_weekly')).toBeNull();
+			expect(registry.getProduct('legacy_visionary')).toBeNull();
+			expect(registry.getProduct('legacy_no_separator')).toBeNull();
+			expect(registry.getProduct('legacy_leading_separator')).toBeNull();
+			expect(registry.getProduct(LEGACY_YEARLY_BRL)?.type).toBe(ProductType.YEARLY_SUBSCRIPTION);
+		});
+
+		test('a slot with an unknown currency is ignored and the rest still registers', () => {
+			const registry = buildRegistry(MOCK_PRICES, {
+				monthly_jpy: ['legacy_jpy'],
+				gift_1_year_gbp: ['legacy_gbp'],
+				monthly_brl: [LEGACY_MONTHLY_BRL],
+			});
+			expect(registry.getProduct('legacy_jpy')).toBeNull();
+			expect(registry.getProduct('legacy_gbp')).toBeNull();
+			expect(registry.getProduct(LEGACY_MONTHLY_BRL)?.currency).toBe('BRL');
+		});
+
+		test('empty, blank and undefined entries inside a slot are skipped', () => {
+			const registry = buildRegistry(MOCK_PRICES, {
+				monthly_brl: ['', undefined as unknown as string, LEGACY_MONTHLY_BRL],
+			});
+			expect(registry.getProduct('')).toBeNull();
+			expect(registry.getProduct(LEGACY_MONTHLY_BRL)?.currency).toBe('BRL');
+		});
+
+		test('an undefined slot value is ignored', () => {
+			const registry = buildRegistry(MOCK_PRICES, {
+				monthly_try: undefined,
+				monthly_brl: [LEGACY_MONTHLY_BRL],
+			});
+			expect(registry.getProduct(LEGACY_MONTHLY_BRL)?.currency).toBe('BRL');
+		});
+
+		test('an array-valued legacy map is ignored without throwing', () => {
+			const registry = buildRegistry(MOCK_PRICES, [
+				'price_legacy_array',
+			] as unknown as typeof Config.stripe.legacyPrices);
+			expect(registry.getProduct('price_legacy_array')).toBeNull();
+			// The authored prices are untouched.
+			expect(registry.getProduct(MOCK_PRICES.monthlyBrl)?.currency).toBe('BRL');
+			expect(registry.getRecurringSubscriptionPriceId('monthly', 'BRL')).toBe(MOCK_PRICES.monthlyBrl);
+		});
+
+		test('a string-valued legacy map is ignored without throwing', () => {
+			const registry = buildRegistry(MOCK_PRICES, 'nonsense' as unknown as typeof Config.stripe.legacyPrices);
+			expect(registry.getProduct('nonsense')).toBeNull();
+			expect(registry.getProduct(MOCK_PRICES.monthlyBrl)?.currency).toBe('BRL');
+		});
+
+		test('a number-valued legacy map is ignored without throwing', () => {
+			const registry = buildRegistry(MOCK_PRICES, 42 as unknown as typeof Config.stripe.legacyPrices);
+			expect(registry.getProduct(MOCK_PRICES.monthlyBrl)?.currency).toBe('BRL');
+		});
+
+		test('an absent or empty legacy map leaves the authored registry intact', () => {
+			expect(buildRegistry(MOCK_PRICES, undefined).getProduct(MOCK_PRICES.monthlyBrl)?.currency).toBe('BRL');
+			expect(buildRegistry(MOCK_PRICES, {}).getProduct(MOCK_PRICES.monthlyBrl)?.currency).toBe('BRL');
+		});
+	});
+});

fluxer_api/src/api/stripe/tests/StripeRefundService.test.ts

@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
+import crypto from 'node:crypto';
 import {APIErrorCodes} from '@fluxer/constants/src/ApiErrorCodes';
+import {PremiumFlags} from '@fluxer/constants/src/UserConstants';
 import type {
 	SelfServeRefundEligibilityResponse,
 	SelfServeRefundResponse,
@@ -9,10 +11,17 @@ import {HttpResponse, http} from 'msw';
 import {afterAll, afterEach, beforeAll, beforeEach, describe, expect, test} from 'vitest';
 import {createTestAccount, type TestAccount} from '../../auth/tests/AuthTestUtils';
 import {createUserID} from '../../BrandedTypes';
+import {Config} from '../../Config';
 import {type ApiTestHarness, createApiTestHarness} from '../../test/ApiTestHarness';
-import {createStripeApiHandlers} from '../../test/msw/handlers/StripeApiHandlers';
+import {
+	createMockWebhookPayload,
+	createStripeApiHandlers,
+	type StripeWebhookEventData,
+} from '../../test/msw/handlers/StripeApiHandlers';
 import {server} from '../../test/msw/server';
 import {createBuilder} from '../../test/TestRequestBuilder';
+import {UserRepository} from '../../user/repositories/UserRepository';
+import {setupSyncStripeWebhookWorker} from './StripeWebhookTestUtils';
 
 const MOCK_CUSTOMER_ID = 'cus_self_serve_refund';
 const MOCK_SUBSCRIPTION_ID = 'sub_self_serve_refund';
@@ -107,6 +116,7 @@ function invoiceListHandler(invoices: ReadonlyArray<MockStripeInvoice>) {
 }
 
 function refundCreateHandler(opts?: {
+	refundId?: string;
 	status?: 'succeeded' | 'pending' | 'failed';
 	failureReason?: string;
 	onRequest?: (idempotencyKey: string | null) => void;
@@ -121,7 +131,7 @@ function refundCreateHandler(opts?: {
 			if (match) metadata[match[1]] = value as string;
 		}
 		return HttpResponse.json({
-			id: 're_test_self_serve',
+			id: opts?.refundId ?? 're_test_self_serve',
 			object: 'refund',
 			amount: Number.parseInt((params.amount as string) ?? '0', 10),
 			currency: 'usd',
@@ -156,7 +166,27 @@ describe('StripeRefundService self-serve refund', () => {
 	let harness: ApiTestHarness;
 	beforeAll(async () => {
 		harness = await createApiTestHarness();
+		setupSyncStripeWebhookWorker();
 	});
+	function createWebhookSignature(payload: string, timestamp: number, secret: string): string {
+		const signedPayload = `${timestamp}.${payload}`;
+		const signature = crypto.createHmac('sha256', secret).update(signedPayload).digest('hex');
+		return `t=${timestamp},v1=${signature}`;
+	}
+	async function sendWebhook(eventData: StripeWebhookEventData): Promise<{
+		received: boolean;
+	}> {
+		const {payload, timestamp} = createMockWebhookPayload(eventData);
+		const signature = createWebhookSignature(payload, timestamp, Config.stripe.webhookSecret!);
+		return createBuilder<{
+			received: boolean;
+		}>(harness, '')
+			.post('/stripe/webhook')
+			.header('stripe-signature', signature)
+			.header('content-type', 'application/json')
+			.body(payload)
+			.execute();
+	}
 	beforeEach(async () => {
 		await harness.reset();
 	});
@@ -345,6 +375,102 @@ describe('StripeRefundService self-serve refund', () => {
 			const updatedUser = await new UserRepository().findUnique(createUserID(BigInt(account.userId)));
 			expect(updatedUser!.firstRefundAt).toBeNull();
 		});
+		test('counts one self-serve refund once even when charge.refunded arrives afterwards and is retried', async () => {
+			server.use(...createStripeApiHandlers().handlers);
+			const invoice = buildInvoice({
+				id: 'in_cross_path',
+				paidAtSecondsAgo: SECONDS_PER_DAY,
+				subscriptionId: null,
+			});
+			server.use(invoiceListHandler([invoice]), refundCreateHandler({refundId: 're_cross_path'}));
+			const account = await createTestAccount(harness);
+			const userId = createUserID(BigInt(account.userId));
+			await setStripeIds(harness, account, {stripe_customer_id: MOCK_CUSTOMER_ID});
+			const response = await createBuilder<SelfServeRefundResponse>(harness, account.token)
+				.post('/premium/refund-latest')
+				.execute();
+			expect(response.refund_id).toBe('re_cross_path');
+			expect(response.status).toBe('succeeded');
+			const userRepository = new UserRepository();
+			const afterSelfServe = await userRepository.findUnique(userId);
+			expect(afterSelfServe!.firstRefundAt).not.toBeNull();
+			expect(afterSelfServe!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+			const chargeEvent = {
+				type: 'charge.refunded' as const,
+				data: {
+					object: {
+						id: invoice.chargeId,
+						payment_intent: invoice.paymentIntentId,
+						customer: MOCK_CUSTOMER_ID,
+						amount_refunded: 2500,
+						refunds: {
+							object: 'list',
+							has_more: false,
+							url: `/v1/charges/${invoice.chargeId}/refunds`,
+							data: [
+								{
+									id: 're_cross_path',
+									object: 'refund',
+									charge: invoice.chargeId,
+									payment_intent: invoice.paymentIntentId,
+									amount: 2500,
+									currency: 'usd',
+									status: 'succeeded',
+									created: Math.floor(Date.now() / 1000),
+									metadata: {
+										refund_kind: 'self_serve',
+										user_id: account.userId,
+										invoice_id: invoice.id,
+									},
+								},
+							],
+						},
+					},
+				},
+			};
+			await sendWebhook({...chargeEvent, id: 'evt_cross_path_1'});
+			await sendWebhook({...chargeEvent, id: 'evt_cross_path_2'});
+			const afterWebhook = await userRepository.findUnique(userId);
+			expect(afterWebhook!.firstRefundAt!.getTime()).toBe(afterSelfServe!.firstRefundAt!.getTime());
+			expect(afterWebhook!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+		});
+		test('counts one self-serve refund once even when refund.updated confirms it after the endpoint already did', async () => {
+			server.use(...createStripeApiHandlers().handlers);
+			const invoice = buildInvoice({
+				id: 'in_double_confirm',
+				paidAtSecondsAgo: SECONDS_PER_DAY,
+				subscriptionId: null,
+			});
+			server.use(invoiceListHandler([invoice]), refundCreateHandler({refundId: 're_double_confirm'}));
+			const account = await createTestAccount(harness);
+			const userId = createUserID(BigInt(account.userId));
+			await setStripeIds(harness, account, {stripe_customer_id: MOCK_CUSTOMER_ID});
+			await createBuilder<SelfServeRefundResponse>(harness, account.token).post('/premium/refund-latest').execute();
+			const userRepository = new UserRepository();
+			const afterSelfServe = await userRepository.findUnique(userId);
+			expect(afterSelfServe!.firstRefundAt).not.toBeNull();
+			await sendWebhook({
+				id: 'evt_double_confirm_1',
+				type: 'refund.updated',
+				data: {
+					object: {
+						id: 're_double_confirm',
+						object: 'refund',
+						status: 'succeeded',
+						amount: 2500,
+						currency: 'usd',
+						metadata: {
+							refund_kind: 'self_serve',
+							user_id: account.userId,
+							invoice_id: invoice.id,
+						},
+					},
+				},
+			});
+			const afterWebhook = await userRepository.findUnique(userId);
+			expect(afterWebhook!.firstRefundAt!.getTime()).toBe(afterSelfServe!.firstRefundAt!.getTime());
+			expect(afterWebhook!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+		});
 		test('retries with a fresh idempotency key once a prior attempt has failed at the provider', async () => {
 			server.use(...createStripeApiHandlers().handlers);
 			server.use(invoiceListHandler([buildInvoice({id: 'in_recent', paidAtSecondsAgo: SECONDS_PER_DAY})]));

fluxer_api/src/api/stripe/tests/StripeSubscriptionListPriceSwitch.test.ts

@@ -0,0 +1,589 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {APIErrorCodes} from '@fluxer/constants/src/ApiErrorCodes';
+import type {
+	ListPriceSwitchIneligibilityReason,
+	PremiumStateResponse,
+	SwitchToListPriceResponse,
+} from '@fluxer/schema/src/domains/premium/PremiumSchemas';
+import {HttpResponse, http} from 'msw';
+import Stripe from 'stripe';
+import {afterAll, beforeAll, beforeEach, describe, expect, test} from 'vitest';
+import {createTestAccount} from '../../auth/tests/AuthTestUtils';
+import {createUserID, type UserID} from '../../BrandedTypes';
+import {Config} from '../../Config';
+import {getBillingRepository} from '../../middleware/ServiceRegistry';
+import {type ApiTestHarness, createApiTestHarness} from '../../test/ApiTestHarness';
+import {createPwnedPasswordsRangeHandler} from '../../test/msw/handlers/PwnedPasswordsHandlers';
+import {createStripeApiHandlers, type StripeApiHandlers} from '../../test/msw/handlers/StripeApiHandlers';
+import {server} from '../../test/msw/server';
+import {createBuilder} from '../../test/TestRequestBuilder';
+import {STRIPE_API_VERSION} from '../StripeApiVersion';
+
+const MOCK_PRICES = {
+	monthlyUsd: 'price_list_monthly_usd',
+	yearlyUsd: 'price_list_yearly_usd',
+	monthlyBrl: 'price_list_monthly_brl',
+	yearlyBrl: 'price_list_yearly_brl',
+};
+
+const RETIRED_MONTHLY_BRL = 'price_retired_monthly_brl';
+const RETIRED_CHEAP_MONTHLY_BRL = 'price_retired_cheap_monthly_brl';
+const RETIRED_MONTHLY_TRY = 'price_retired_monthly_try';
+const RETIRED_EQUAL_MONTHLY_BRL = 'price_retired_equal_monthly_brl';
+
+const LIST_MONTHLY_BRL_MINOR = 1890;
+const LIST_YEARLY_BRL_MINOR = 18900;
+const RETIRED_MONTHLY_BRL_MINOR = 2499;
+const RETIRED_CHEAP_MONTHLY_BRL_MINOR = 990;
+const RETIRED_MONTHLY_TRY_MINOR = 2999;
+
+const MOCK_PRICE_SEEDS: Record<
+	string,
+	{
+		unit_amount: number;
+		currency: string;
+		interval: 'month' | 'year';
+	}
+> = {
+	[MOCK_PRICES.monthlyUsd]: {unit_amount: 499, currency: 'usd', interval: 'month'},
+	[MOCK_PRICES.yearlyUsd]: {unit_amount: 4999, currency: 'usd', interval: 'year'},
+	[MOCK_PRICES.monthlyBrl]: {unit_amount: LIST_MONTHLY_BRL_MINOR, currency: 'brl', interval: 'month'},
+	[MOCK_PRICES.yearlyBrl]: {unit_amount: LIST_YEARLY_BRL_MINOR, currency: 'brl', interval: 'year'},
+	[RETIRED_MONTHLY_BRL]: {unit_amount: RETIRED_MONTHLY_BRL_MINOR, currency: 'brl', interval: 'month'},
+	[RETIRED_CHEAP_MONTHLY_BRL]: {unit_amount: RETIRED_CHEAP_MONTHLY_BRL_MINOR, currency: 'brl', interval: 'month'},
+	[RETIRED_MONTHLY_TRY]: {unit_amount: RETIRED_MONTHLY_TRY_MINOR, currency: 'try', interval: 'month'},
+	[RETIRED_EQUAL_MONTHLY_BRL]: {unit_amount: LIST_MONTHLY_BRL_MINOR, currency: 'brl', interval: 'month'},
+};
+
+interface SubscriberFixture {
+	subscriptionId: string;
+	priceId: string;
+	status?: 'active' | 'trialing' | 'past_due';
+	cancelAt?: number | null;
+	cancelAtPeriodEnd?: boolean;
+	periodStart?: number;
+	periodEnd?: number;
+}
+
+interface ResolvedSubscriber {
+	token: string;
+	userId: UserID;
+	subscriptionId: string;
+	priceId: string;
+	periodStart: number;
+	periodEnd: number;
+}
+
+describe('StripeSubscriptionListPriceSwitch', () => {
+	let harness: ApiTestHarness;
+	let stripeHandlers: StripeApiHandlers;
+	let originalPrices: typeof Config.stripe.prices | undefined;
+
+	function applyStripeHandlers(fixture: Required<SubscriberFixture>): void {
+		const seed = MOCK_PRICE_SEEDS[fixture.priceId];
+		if (!seed) {
+			throw new Error(`Missing explicit price seed for ${fixture.priceId}`);
+		}
+		stripeHandlers = createStripeApiHandlers({
+			subscriptions: {
+				[fixture.subscriptionId]: {
+					customer: `cus_${fixture.subscriptionId}`,
+					price_id: fixture.priceId,
+					unit_amount: seed.unit_amount,
+					currency: seed.currency,
+					interval: seed.interval,
+					item_id: `si_${fixture.subscriptionId}`,
+					current_period_start: fixture.periodStart,
+					current_period_end: fixture.periodEnd,
+					status: fixture.status,
+					cancel_at: fixture.cancelAt,
+					cancel_at_period_end: fixture.cancelAtPeriodEnd,
+				},
+			},
+			prices: MOCK_PRICE_SEEDS,
+		});
+		server.use(...stripeHandlers.handlers, createPwnedPasswordsRangeHandler());
+	}
+
+	async function mirrorStripeState(userId: UserID, subscriptionId: string): Promise<void> {
+		const stripe = new Stripe(Config.stripe.secretKey ?? 'sk_test_fluxer', {
+			apiVersion: STRIPE_API_VERSION,
+			httpClient: Stripe.createFetchHttpClient(),
+		});
+		const subscription = await stripe.subscriptions.retrieve(subscriptionId, {expand: ['items.data.price']});
+		await getBillingRepository().subscriptions.upsertFromStripe(subscription, {
+			knownUserId: userId,
+			snapshotCapturedAt: new Date(),
+		});
+		for (const priceId of Object.keys(MOCK_PRICE_SEEDS)) {
+			const price = await stripe.prices.retrieve(priceId);
+			await getBillingRepository().prices.upsertFromStripe(price);
+		}
+	}
+
+	async function createSubscriber(fixture: SubscriberFixture): Promise<ResolvedSubscriber> {
+		const periodStart = fixture.periodStart ?? Math.floor(Date.now() / 1000) - 3 * 24 * 60 * 60;
+		const periodEnd = fixture.periodEnd ?? periodStart + 30 * 24 * 60 * 60;
+		const resolved: Required<SubscriberFixture> = {
+			subscriptionId: fixture.subscriptionId,
+			priceId: fixture.priceId,
+			status: fixture.status ?? 'active',
+			cancelAt: fixture.cancelAt ?? null,
+			cancelAtPeriodEnd: fixture.cancelAtPeriodEnd ?? false,
+			periodStart,
+			periodEnd,
+		};
+		const account = await createTestAccount(harness);
+		applyStripeHandlers(resolved);
+		await createBuilder(harness, account.token)
+			.post(`/test/users/${account.userId}/premium`)
+			.body({
+				stripe_subscription_id: resolved.subscriptionId,
+				premium_type: 1,
+				premium_billing_cycle: MOCK_PRICE_SEEDS[resolved.priceId]?.interval === 'year' ? 'yearly' : 'monthly',
+				premium_until: new Date(periodEnd * 1000).toISOString(),
+				premium_will_cancel: Boolean(resolved.cancelAt) || resolved.cancelAtPeriodEnd,
+			})
+			.execute();
+		const userId = createUserID(BigInt(account.userId));
+		await mirrorStripeState(userId, resolved.subscriptionId);
+		return {
+			token: account.token,
+			userId,
+			subscriptionId: resolved.subscriptionId,
+			priceId: resolved.priceId,
+			periodStart,
+			periodEnd,
+		};
+	}
+
+	function switchToListPrice(subscriber: ResolvedSubscriber): Promise<SwitchToListPriceResponse> {
+		return createBuilder<SwitchToListPriceResponse>(harness, subscriber.token)
+			.post('/premium/switch-to-list-price')
+			.expect(200)
+			.execute();
+	}
+
+	function getPremiumState(subscriber: ResolvedSubscriber): Promise<PremiumStateResponse> {
+		return createBuilder<PremiumStateResponse>(harness, subscriber.token).get('/premium/state').expect(200).execute();
+	}
+
+	function expectNoStripeWrites(): void {
+		expect(stripeHandlers.spies.updatedSubscriptions).toHaveLength(0);
+		expect(stripeHandlers.spies.cancelledSubscriptions).toHaveLength(0);
+		expect(stripeHandlers.spies.createdSubscriptionSchedules).toHaveLength(0);
+		expect(stripeHandlers.spies.updatedSubscriptionSchedules).toHaveLength(0);
+		expect(stripeHandlers.spies.releasedSubscriptionSchedules).toHaveLength(0);
+	}
+
+	async function expectRefusal(
+		subscriber: ResolvedSubscriber,
+		reason: ListPriceSwitchIneligibilityReason,
+	): Promise<void> {
+		const result = await switchToListPrice(subscriber);
+		expect(result).toEqual({status: 'ineligible', reason});
+		const state = await getPremiumState(subscriber);
+		expect(state.billing.list_price_switch.available).toBe(false);
+		expect(state.billing.list_price_switch.reason).toBe(reason);
+	}
+
+	beforeAll(async () => {
+		originalPrices = Config.stripe.prices;
+		Config.stripe.prices = MOCK_PRICES;
+		harness = await createApiTestHarness();
+		stripeHandlers = createStripeApiHandlers({prices: MOCK_PRICE_SEEDS});
+		server.use(...stripeHandlers.handlers);
+	});
+	afterAll(async () => {
+		await harness.shutdown();
+		Config.stripe.prices = originalPrices;
+	});
+	beforeEach(async () => {
+		await harness.resetData();
+		Config.stripe.prices = MOCK_PRICES;
+		stripeHandlers.resetAll();
+		server.use(...stripeHandlers.handlers, createPwnedPasswordsRangeHandler());
+	});
+
+	describe('POST /premium/switch-to-list-price', () => {
+		test('schedules a grandfathered BRL monthly subscriber onto the current list price at period end', async () => {
+			const moneyMoves: Array<string> = [];
+			server.use(
+				http.post('https://api.stripe.com/v1/invoices', () => {
+					moneyMoves.push('invoices.create');
+					return HttpResponse.json({});
+				}),
+				http.post('https://api.stripe.com/v1/charges', () => {
+					moneyMoves.push('charges.create');
+					return HttpResponse.json({});
+				}),
+				http.post('https://api.stripe.com/v1/payment_intents', () => {
+					moneyMoves.push('payment_intents.create');
+					return HttpResponse.json({});
+				}),
+			);
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_grandfathered',
+				priceId: RETIRED_MONTHLY_BRL,
+			});
+			const result = await switchToListPrice(subscriber);
+			expect(result).toEqual({
+				status: 'scheduled',
+				effective_at: new Date(subscriber.periodEnd * 1000).toISOString(),
+				target_price_id: MOCK_PRICES.monthlyBrl,
+				target_amount_minor: LIST_MONTHLY_BRL_MINOR,
+				current_amount_minor: RETIRED_MONTHLY_BRL_MINOR,
+				currency: 'BRL',
+			});
+			expect(stripeHandlers.spies.createdSubscriptionSchedules).toHaveLength(1);
+			expect(stripeHandlers.spies.createdSubscriptionSchedules[0]?.from_subscription).toBe('sub_brl_grandfathered');
+			expect(stripeHandlers.spies.updatedSubscriptionSchedules).toHaveLength(1);
+			const scheduleUpdate = stripeHandlers.spies.updatedSubscriptionSchedules[0];
+			expect(scheduleUpdate?.params.end_behavior).toBe('release');
+			expect(scheduleUpdate?.params.proration_behavior).toBe('none');
+			expect(scheduleUpdate?.params.phases).toHaveLength(2);
+			expect(scheduleUpdate?.params.phases?.[0]?.end_date).toBe(String(subscriber.periodEnd));
+			expect(scheduleUpdate?.params.phases?.[0]?.items?.[0]?.price).toBe(RETIRED_MONTHLY_BRL);
+			expect(scheduleUpdate?.params.phases?.[1]?.start_date).toBe(String(subscriber.periodEnd));
+			expect(scheduleUpdate?.params.phases?.[1]?.items?.[0]?.price).toBe(MOCK_PRICES.monthlyBrl);
+			expect(scheduleUpdate?.params.phases?.[1]?.proration_behavior).toBe('none');
+			expect(scheduleUpdate?.params.phases?.[1]?.billing_cycle_anchor).toBeUndefined();
+			expect(scheduleUpdate?.params.phases?.[1]?.add_invoice_items).toBeUndefined();
+			expect(stripeHandlers.spies.updatedSubscriptions).toHaveLength(0);
+			expect(moneyMoves).toEqual([]);
+			const me = await createBuilder<{
+				premium_will_cancel: boolean;
+			}>(harness, subscriber.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_will_cancel).toBe(false);
+			const state = await getPremiumState(subscriber);
+			expect(state.billing.pending_subscription_change).toBeNull();
+			expect(state.billing.list_price_switch).toEqual(
+				expect.objectContaining({
+					available: false,
+					reason: null,
+					pending: true,
+					effective_at: new Date(subscriber.periodEnd * 1000).toISOString(),
+					current_price_id: RETIRED_MONTHLY_BRL,
+					current_amount_minor: RETIRED_MONTHLY_BRL_MINOR,
+					list_price_id: MOCK_PRICES.monthlyBrl,
+					list_amount_minor: LIST_MONTHLY_BRL_MINOR,
+					currency: 'BRL',
+					billing_cycle: 'monthly',
+				}),
+			);
+		});
+
+		test('preserves the phase-level settings Stripe would otherwise unset on the live subscription', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_phase_settings',
+				priceId: RETIRED_MONTHLY_BRL,
+			});
+			const scheduleId = 'sub_sched_phase_settings';
+			const richSchedule = {
+				id: scheduleId,
+				object: 'subscription_schedule',
+				status: 'active',
+				subscription: subscriber.subscriptionId,
+				end_behavior: 'release',
+				metadata: {},
+				current_phase: {start_date: subscriber.periodStart, end_date: subscriber.periodEnd},
+				phases: [
+					{
+						start_date: subscriber.periodStart,
+						end_date: subscriber.periodEnd,
+						currency: 'brl',
+						collection_method: 'send_invoice',
+						description: 'Grandfathered Plutonium',
+						metadata: {campaign: 'brl_2026'},
+						discounts: [{coupon: {id: 'co_grandfather_10'}, discount: null, promotion_code: null}],
+						default_tax_rates: [{id: 'txr_br_icms'}],
+						automatic_tax: {enabled: true, disabled_reason: null, liability: {type: 'self'}},
+						invoice_settings: {account_tax_ids: null, days_until_due: 14, issuer: null},
+						billing_cycle_anchor: 'automatic',
+						add_invoice_items: [],
+						items: [
+							{
+								price: RETIRED_MONTHLY_BRL,
+								quantity: 1,
+								metadata: {seat: 'primary'},
+								discounts: [{coupon: null, discount: 'di_existing', promotion_code: null}],
+								tax_rates: [{id: 'txr_br_iss'}],
+								billing_thresholds: null,
+							},
+						],
+						proration_behavior: 'none',
+					},
+				],
+				livemode: false,
+				created: Math.floor(Date.now() / 1000),
+			};
+			const scheduleUpdates: Array<Record<string, string>> = [];
+			server.use(
+				http.post('https://api.stripe.com/v1/subscription_schedules', () => HttpResponse.json(richSchedule)),
+				http.post(`https://api.stripe.com/v1/subscription_schedules/${scheduleId}`, async ({request}) => {
+					const formData = await request.formData();
+					const entries: Record<string, string> = {};
+					for (const [key, value] of formData.entries()) {
+						entries[key] = String(value);
+					}
+					scheduleUpdates.push(entries);
+					return HttpResponse.json(richSchedule);
+				}),
+			);
+			const result = await switchToListPrice(subscriber);
+			expect(result.status).toBe('scheduled');
+			expect(scheduleUpdates).toHaveLength(1);
+			const update = scheduleUpdates[0]!;
+			expect(update['phases[0][items][0][price]']).toBe(RETIRED_MONTHLY_BRL);
+			expect(update['phases[0][discounts][0][coupon]']).toBe('co_grandfather_10');
+			expect(update['phases[0][default_tax_rates][0]']).toBe('txr_br_icms');
+			expect(update['phases[0][items][0][tax_rates][0]']).toBe('txr_br_iss');
+			expect(update['phases[0][items][0][discounts][0][discount]']).toBe('di_existing');
+			expect(update['phases[0][items][0][metadata][seat]']).toBe('primary');
+			expect(update['phases[0][metadata][campaign]']).toBe('brl_2026');
+			expect(update['phases[0][collection_method]']).toBe('send_invoice');
+			expect(update['phases[0][description]']).toBe('Grandfathered Plutonium');
+			expect(update['phases[0][currency]']).toBe('brl');
+			expect(update['phases[0][automatic_tax][enabled]']).toBe('true');
+			expect(update['phases[0][automatic_tax][liability][type]']).toBe('self');
+			expect(update['phases[0][invoice_settings][days_until_due]']).toBe('14');
+			expect(update['phases[0][billing_cycle_anchor]']).toBe('automatic');
+			expect(update['phases[0][end_date]']).toBe(String(subscriber.periodEnd));
+			expect(update['phases[1][items][0][price]']).toBe(MOCK_PRICES.monthlyBrl);
+			expect(update['phases[1][discounts][0][coupon]']).toBeUndefined();
+		});
+
+		test('refuses to move a subscriber up to a more expensive list price', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_below_list',
+				priceId: RETIRED_CHEAP_MONTHLY_BRL,
+			});
+			await expectRefusal(subscriber, 'not_a_price_decrease');
+			expectNoStripeWrites();
+		});
+
+		test('refuses a subscriber who is cancelling at period end', async () => {
+			const periodStart = Math.floor(Date.now() / 1000) - 3 * 24 * 60 * 60;
+			const periodEnd = periodStart + 30 * 24 * 60 * 60;
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_cancel_at_period_end',
+				priceId: RETIRED_MONTHLY_BRL,
+				cancelAtPeriodEnd: true,
+				periodStart,
+				periodEnd,
+			});
+			await expectRefusal(subscriber, 'subscription_cancelling');
+			expectNoStripeWrites();
+			const me = await createBuilder<{
+				premium_will_cancel: boolean;
+			}>(harness, subscriber.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_will_cancel).toBe(true);
+		});
+
+		test('refuses a subscriber who is cancelling on an explicit cancel_at date', async () => {
+			const periodStart = Math.floor(Date.now() / 1000) - 3 * 24 * 60 * 60;
+			const periodEnd = periodStart + 30 * 24 * 60 * 60;
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_cancel_at',
+				priceId: RETIRED_MONTHLY_BRL,
+				cancelAt: periodEnd,
+				cancelAtPeriodEnd: false,
+				periodStart,
+				periodEnd,
+			});
+			await expectRefusal(subscriber, 'subscription_cancelling');
+			expectNoStripeWrites();
+			const me = await createBuilder<{
+				premium_will_cancel: boolean;
+			}>(harness, subscriber.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_will_cancel).toBe(true);
+		});
+
+		test('is idempotent and reports an already scheduled switch on the second call', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_idempotent',
+				priceId: RETIRED_MONTHLY_BRL,
+			});
+			const first = await switchToListPrice(subscriber);
+			expect(first.status).toBe('scheduled');
+			const second = await switchToListPrice(subscriber);
+			expect(second).toEqual({
+				status: 'already_scheduled',
+				effective_at: new Date(subscriber.periodEnd * 1000).toISOString(),
+				target_price_id: MOCK_PRICES.monthlyBrl,
+				target_amount_minor: LIST_MONTHLY_BRL_MINOR,
+				current_amount_minor: RETIRED_MONTHLY_BRL_MINOR,
+				currency: 'BRL',
+			});
+			expect(stripeHandlers.spies.createdSubscriptionSchedules).toHaveLength(1);
+			expect(stripeHandlers.spies.updatedSubscriptionSchedules).toHaveLength(1);
+		});
+
+		test('refuses a retired price that costs exactly the same as the list price', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_equal_price',
+				priceId: RETIRED_EQUAL_MONTHLY_BRL,
+			});
+			await expectRefusal(subscriber, 'not_a_price_decrease');
+			expectNoStripeWrites();
+		});
+
+		test('lets a scheduled switch be withdrawn again and restores eligibility', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_withdrawn',
+				priceId: RETIRED_MONTHLY_BRL,
+			});
+			expect((await switchToListPrice(subscriber)).status).toBe('scheduled');
+			await createBuilder(harness, subscriber.token)
+				.post('/premium/cancel-pending-subscription-change')
+				.expect(204)
+				.execute();
+			expect(stripeHandlers.spies.releasedSubscriptionSchedules).toHaveLength(1);
+			expect(stripeHandlers.spies.releasedSubscriptionSchedules[0]?.params.preserve_cancel_date).toBe('false');
+			const state = await getPremiumState(subscriber);
+			expect(state.billing.pending_subscription_change).toBeNull();
+			expect(state.billing.list_price_switch).toEqual(
+				expect.objectContaining({
+					available: true,
+					reason: null,
+					pending: false,
+					current_price_id: RETIRED_MONTHLY_BRL,
+					current_amount_minor: RETIRED_MONTHLY_BRL_MINOR,
+					list_price_id: MOCK_PRICES.monthlyBrl,
+					list_amount_minor: LIST_MONTHLY_BRL_MINOR,
+				}),
+			);
+		});
+
+		test('refuses a subscriber who is already on the current list price', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_on_list_price',
+				priceId: MOCK_PRICES.monthlyBrl,
+			});
+			await expectRefusal(subscriber, 'already_on_list_price');
+			expectNoStripeWrites();
+		});
+
+		test('refuses a currency that has no configured list price', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_try_unconfigured',
+				priceId: RETIRED_MONTHLY_TRY,
+			});
+			await expectRefusal(subscriber, 'no_list_price');
+			expectNoStripeWrites();
+		});
+
+		test('refuses a subscription that is not chargeable', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_past_due',
+				priceId: RETIRED_MONTHLY_BRL,
+				status: 'past_due',
+			});
+			await expectRefusal(subscriber, 'subscription_not_chargeable');
+			expectNoStripeWrites();
+		});
+
+		test('refuses a subscriber whose cancellation is managed by a subscription schedule', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_schedule_cancel',
+				priceId: RETIRED_MONTHLY_BRL,
+			});
+			await createBuilder(harness, subscriber.token)
+				.post('/premium/change-subscription')
+				.body({billing_cycle: 'yearly', effective_at: 'period_end'})
+				.expect(204)
+				.execute();
+			await createBuilder(harness, subscriber.token).post('/premium/cancel-subscription').expect(204).execute();
+			stripeHandlers.spies.updatedSubscriptions.length = 0;
+			stripeHandlers.spies.createdSubscriptionSchedules.length = 0;
+			stripeHandlers.spies.updatedSubscriptionSchedules.length = 0;
+			stripeHandlers.spies.releasedSubscriptionSchedules.length = 0;
+			const result = await switchToListPrice(subscriber);
+			expect(result).toEqual({status: 'ineligible', reason: 'subscription_cancelling'});
+			expectNoStripeWrites();
+			const me = await createBuilder<{
+				premium_will_cancel: boolean;
+			}>(harness, subscriber.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_will_cancel).toBe(true);
+		});
+
+		test('refuses when a billing cycle change is already pending', async () => {
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_pending_cycle_change',
+				priceId: RETIRED_MONTHLY_BRL,
+			});
+			await createBuilder(harness, subscriber.token)
+				.post('/premium/change-subscription')
+				.body({billing_cycle: 'yearly', effective_at: 'period_end'})
+				.expect(204)
+				.execute();
+			stripeHandlers.spies.updatedSubscriptions.length = 0;
+			stripeHandlers.spies.createdSubscriptionSchedules.length = 0;
+			stripeHandlers.spies.updatedSubscriptionSchedules.length = 0;
+			await expectRefusal(subscriber, 'conflicting_pending_change');
+			expectNoStripeWrites();
+		});
+
+		test('rejects a user without an active subscription and mirrors that in premium state', async () => {
+			const account = await createTestAccount(harness);
+			await createBuilder(harness, account.token)
+				.post('/premium/switch-to-list-price')
+				.expect(400, APIErrorCodes.STRIPE_NO_ACTIVE_SUBSCRIPTION)
+				.execute();
+			const state = await createBuilder<PremiumStateResponse>(harness, account.token)
+				.get('/premium/state')
+				.expect(200)
+				.execute();
+			expect(state.billing.list_price_switch.available).toBe(false);
+			expect(state.billing.list_price_switch.reason).toBe('no_active_subscription');
+			expectNoStripeWrites();
+		});
+	});
+
+	describe('POST /premium/change-subscription (unchanged behaviour)', () => {
+		test('still clears a pending cancellation and re-anchors billing when the cycle actually changes', async () => {
+			const periodStart = Math.floor(Date.now() / 1000) - 3 * 24 * 60 * 60;
+			const periodEnd = periodStart + 30 * 24 * 60 * 60;
+			const subscriber = await createSubscriber({
+				subscriptionId: 'sub_brl_cycle_change',
+				priceId: RETIRED_MONTHLY_BRL,
+				cancelAt: periodEnd,
+				cancelAtPeriodEnd: false,
+				periodStart,
+				periodEnd,
+			});
+			await createBuilder(harness, subscriber.token)
+				.post('/premium/change-subscription')
+				.body({billing_cycle: 'yearly', effective_at: 'period_end'})
+				.expect(204)
+				.execute();
+			expect(stripeHandlers.spies.updatedSubscriptions).toHaveLength(1);
+			const clearCancelUpdate = stripeHandlers.spies.updatedSubscriptions[0];
+			expect(clearCancelUpdate?.id).toBe('sub_brl_cycle_change');
+			expect(clearCancelUpdate?.params.cancel_at).toBe('');
+			expect(clearCancelUpdate?.params.proration_behavior).toBe('none');
+			expect(clearCancelUpdate?.params.items).toBeUndefined();
+			expect(stripeHandlers.spies.updatedSubscriptionSchedules).toHaveLength(1);
+			const scheduleUpdate = stripeHandlers.spies.updatedSubscriptionSchedules[0];
+			expect(scheduleUpdate?.params.end_behavior).toBe('release');
+			expect(scheduleUpdate?.params.phases?.[1]?.start_date).toBe(String(periodEnd));
+			expect(scheduleUpdate?.params.phases?.[1]?.billing_cycle_anchor).toBe('phase_start');
+			expect(scheduleUpdate?.params.phases?.[1]?.items?.[0]?.price).toBe(MOCK_PRICES.yearlyBrl);
+			const me = await createBuilder<{
+				premium_will_cancel: boolean;
+			}>(harness, subscriber.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_will_cancel).toBe(false);
+		});
+	});
+});

fluxer_api/src/api/stripe/tests/StripeWebhookInvoice.test.ts

@@ -4,12 +4,14 @@ import crypto from 'node:crypto';
 import {APIErrorCodes} from '@fluxer/constants/src/ApiErrorCodes';
 import {UserPremiumTypes} from '@fluxer/constants/src/UserConstants';
 import {HttpResponse, http} from 'msw';
-import {afterAll, afterEach, beforeAll, beforeEach, describe, expect, test} from 'vitest';
+import {afterAll, afterEach, beforeAll, beforeEach, describe, expect, test, vi} from 'vitest';
 import {createTestAccount} from '../../auth/tests/AuthTestUtils';
 import {createUserID} from '../../BrandedTypes';
 import {Config} from '../../Config';
+import {Logger} from '../../Logger';
 import {getBillingRepository} from '../../middleware/ServiceRegistry';
 import {type ApiTestHarness, createApiTestHarness} from '../../test/ApiTestHarness';
+import {NoopLogger} from '../../test/mocks/NoopLogger';
 import {
 	createInvoiceFinalizationFailedEvent,
 	createInvoicePaidEvent,
@@ -41,16 +43,24 @@ const MOCK_PRICES = {
 	gift1YearEur: 'price_gift_1_year_eur',
 };
 
+const LEGACY_MONTHLY_BRL_PRICE = 'price_legacy_monthly_brl';
+const LEGACY_YEARLY_BRL_PRICE = 'price_legacy_yearly_brl';
+const UNMAPPED_PRICE = 'price_retired_unmapped_brl';
+const MANDATE_REVOKED_WARNING =
+	'Stripe mandate is no longer active; recurring payments on this payment method will fail';
+
 describe('Stripe Webhook - Invoice Events', () => {
 	let harness: ApiTestHarness;
 	let stripeHandlers: StripeApiHandlers;
 	let originalWebhookSecret: string | undefined;
 	let originalPrices: typeof Config.stripe.prices | undefined;
+	let originalLegacyPrices: typeof Config.stripe.legacyPrices | undefined;
 	beforeAll(async () => {
 		harness = await createApiTestHarness();
 		setupSyncStripeWebhookWorker();
 		originalWebhookSecret = Config.stripe.webhookSecret;
 		originalPrices = Config.stripe.prices;
+		originalLegacyPrices = Config.stripe.legacyPrices;
 		Config.stripe.webhookSecret = 'whsec_test_secret';
 		Config.stripe.prices = MOCK_PRICES;
 		stripeHandlers = createStripeApiHandlers();
@@ -60,9 +70,11 @@ describe('Stripe Webhook - Invoice Events', () => {
 		await harness.shutdown();
 		Config.stripe.webhookSecret = originalWebhookSecret;
 		Config.stripe.prices = originalPrices;
+		Config.stripe.legacyPrices = originalLegacyPrices;
 	});
 	beforeEach(async () => {
 		await harness.resetData();
+		Config.stripe.legacyPrices = undefined;
 		stripeHandlers.reset();
 		server.use(...stripeHandlers.handlers);
 	});
@@ -104,7 +116,7 @@ describe('Stripe Webhook - Invoice Events', () => {
 		subscriptionId: string;
 		priceId: string;
 		productType: string;
-	}): Promise<void> {
+	}): Promise<string> {
 		const {userId, subscriptionId, priceId, productType} = params;
 		const checkoutSessionId = `cs_test_${crypto.randomUUID()}`;
 		const {PaymentRepository} = await import('../../user/repositories/PaymentRepository');
@@ -127,6 +139,7 @@ describe('Stripe Webhook - Invoice Events', () => {
 			currency: 'usd',
 			completed_at: new Date(),
 		});
+		return checkoutSessionId;
 	}
 	async function setSubscriptionUserState(params: {
 		accountUserId: string;
@@ -856,4 +869,365 @@ describe('Stripe Webhook - Invoice Events', () => {
 			expect(me.premium_until).not.toBeNull();
 		});
 	});
+	describe('renewals on retired prices', () => {
+		test('renews a subscription whose price is only known to the legacy price map', async () => {
+			Config.stripe.legacyPrices = {monthly_brl: [LEGACY_MONTHLY_BRL_PRICE]};
+			const account = await createTestAccount(harness);
+			const subscriptionId = 'sub_legacy_brl_renewal';
+			const customerId = 'cus_legacy_brl_renewal';
+			const invoiceId = 'in_legacy_brl_renewal';
+			const checkoutSessionId = await createPaymentRecord({
+				userId: account.userId,
+				subscriptionId,
+				priceId: LEGACY_MONTHLY_BRL_PRICE,
+				productType: ProductType.MONTHLY_SUBSCRIPTION,
+			});
+			const currentPeriodStart = Math.floor(Date.now() / 1000) - 2 * 24 * 60 * 60;
+			server.use(
+				...createStripeApiHandlers({
+					subscriptions: {
+						[subscriptionId]: {
+							customer: customerId,
+							price_id: LEGACY_MONTHLY_BRL_PRICE,
+							currency: 'brl',
+							interval: 'month',
+							item_id: 'si_legacy_brl_renewal',
+							current_period_start: currentPeriodStart,
+							current_period_end: currentPeriodStart + 30 * 24 * 60 * 60,
+						},
+					},
+				}).handlers,
+			);
+			const result = await sendWebhook({
+				type: 'invoice.payment_succeeded',
+				data: {
+					object: {
+						id: invoiceId,
+						billing_reason: 'subscription_cycle',
+						customer: customerId,
+						parent: {subscription_details: {subscription: subscriptionId}},
+					},
+				},
+			});
+			expect(result.received).toBe(true);
+			const me = await createBuilder<{
+				premium_billing_cycle: string | null;
+				premium_type: number | null;
+				premium_until: string | null;
+			}>(harness, account.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_type).toBe(UserPremiumTypes.SUBSCRIPTION);
+			expect(me.premium_billing_cycle).toBe('monthly');
+			expect(me.premium_until).not.toBeNull();
+			expect(new Date(me.premium_until!).toISOString()).toBe(
+				new Date((currentPeriodStart + 30 * 24 * 60 * 60) * 1000).toISOString(),
+			);
+			const {PaymentRepository} = await import('../../user/repositories/PaymentRepository');
+			const payment = await new PaymentRepository().getPaymentByCheckoutSession(checkoutSessionId);
+			expect(payment?.invoiceId).toBe(invoiceId);
+		});
+		test('renews a subscription whose retired price sits in a legacy slot alongside other price ids', async () => {
+			Config.stripe.legacyPrices = {
+				monthly_brl: ['price_legacy_monthly_brl_older', LEGACY_MONTHLY_BRL_PRICE],
+				yearly_brl: [LEGACY_YEARLY_BRL_PRICE],
+			};
+			const account = await createTestAccount(harness);
+			const subscriptionId = 'sub_legacy_brl_yearly_renewal';
+			const customerId = 'cus_legacy_brl_yearly_renewal';
+			await createPaymentRecord({
+				userId: account.userId,
+				subscriptionId,
+				priceId: LEGACY_YEARLY_BRL_PRICE,
+				productType: ProductType.YEARLY_SUBSCRIPTION,
+			});
+			const currentPeriodStart = Math.floor(Date.now() / 1000) - 2 * 24 * 60 * 60;
+			server.use(
+				...createStripeApiHandlers({
+					subscriptions: {
+						[subscriptionId]: {
+							customer: customerId,
+							price_id: LEGACY_YEARLY_BRL_PRICE,
+							currency: 'brl',
+							interval: 'year',
+							item_id: 'si_legacy_brl_yearly_renewal',
+							current_period_start: currentPeriodStart,
+							current_period_end: currentPeriodStart + 365 * 24 * 60 * 60,
+						},
+					},
+				}).handlers,
+			);
+			const result = await sendWebhook({
+				type: 'invoice.payment_succeeded',
+				data: {
+					object: {
+						id: 'in_legacy_brl_yearly_renewal',
+						billing_reason: 'subscription_cycle',
+						customer: customerId,
+						parent: {subscription_details: {subscription: subscriptionId}},
+					},
+				},
+			});
+			expect(result.received).toBe(true);
+			const me = await createBuilder<{
+				premium_billing_cycle: string | null;
+				premium_type: number | null;
+				premium_until: string | null;
+			}>(harness, account.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_type).toBe(UserPremiumTypes.SUBSCRIPTION);
+			expect(me.premium_billing_cycle).toBe('yearly');
+			expect(new Date(me.premium_until!).toISOString()).toBe(
+				new Date((currentPeriodStart + 365 * 24 * 60 * 60) * 1000).toISOString(),
+			);
+		});
+		test('still rejects a renewal whose price is in neither the configured nor the legacy price map', async () => {
+			Config.stripe.legacyPrices = {monthly_brl: [LEGACY_MONTHLY_BRL_PRICE]};
+			const account = await createTestAccount(harness);
+			const subscriptionId = 'sub_unmapped_price_renewal';
+			const customerId = 'cus_unmapped_price_renewal';
+			await createPaymentRecord({
+				userId: account.userId,
+				subscriptionId,
+				priceId: UNMAPPED_PRICE,
+				productType: ProductType.MONTHLY_SUBSCRIPTION,
+			});
+			await createBuilder(harness, account.token)
+				.post(`/test/users/${account.userId}/premium`)
+				.body({
+					stripe_subscription_id: subscriptionId,
+					stripe_customer_id: customerId,
+				})
+				.execute();
+			const currentPeriodStart = Math.floor(Date.now() / 1000) - 2 * 24 * 60 * 60;
+			server.use(
+				...createStripeApiHandlers({
+					subscriptions: {
+						[subscriptionId]: {
+							customer: customerId,
+							price_id: UNMAPPED_PRICE,
+							currency: 'brl',
+							interval: 'month',
+							item_id: 'si_unmapped_price_renewal',
+							current_period_start: currentPeriodStart,
+							current_period_end: currentPeriodStart + 30 * 24 * 60 * 60,
+						},
+					},
+				}).handlers,
+			);
+			await sendWebhookExpectStripeError({
+				type: 'invoice.payment_succeeded',
+				data: {
+					object: {
+						id: 'in_unmapped_price_renewal',
+						billing_reason: 'subscription_cycle',
+						customer: customerId,
+						parent: {subscription_details: {subscription: subscriptionId}},
+					},
+				},
+			});
+			const me = await createBuilder<{
+				premium_type: number | null;
+				premium_until: string | null;
+			}>(harness, account.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_type).toBe(UserPremiumTypes.NONE);
+			expect(me.premium_until).toBeNull();
+		});
+		test('lets an authored price win over a legacy entry that claims the same price id', async () => {
+			Config.stripe.legacyPrices = {yearly_brl: [MOCK_PRICES.monthlyUsd]};
+			const account = await createTestAccount(harness);
+			const subscriptionId = 'sub_authored_wins_over_legacy';
+			await createPaymentRecord({
+				userId: account.userId,
+				subscriptionId,
+				priceId: MOCK_PRICES.monthlyUsd,
+				productType: ProductType.MONTHLY_SUBSCRIPTION,
+			});
+			const result = await sendWebhook({
+				type: 'invoice.payment_succeeded',
+				data: {
+					object: {
+						id: 'in_authored_wins_over_legacy',
+						billing_reason: 'subscription_cycle',
+						parent: {subscription_details: {subscription: subscriptionId}},
+					},
+				},
+			});
+			expect(result.received).toBe(true);
+			const me = await createBuilder<{
+				premium_billing_cycle: string | null;
+				premium_type: number | null;
+			}>(harness, account.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_type).toBe(UserPremiumTypes.SUBSCRIPTION);
+			expect(me.premium_billing_cycle).toBe('monthly');
+		});
+	});
+	describe('donation subscription guard', () => {
+		test('does not extend premium for an invoice on a donation subscription', async () => {
+			const account = await createTestAccount(harness);
+			const subscriptionId = 'sub_donation_recurring';
+			await createPaymentRecord({
+				userId: account.userId,
+				subscriptionId,
+				priceId: MOCK_PRICES.monthlyUsd,
+				productType: ProductType.MONTHLY_SUBSCRIPTION,
+			});
+			const {DonationRepository} = await import('../../donation/DonationRepository');
+			await new DonationRepository().createDonor({
+				email: '[email protected]',
+				stripeCustomerId: 'cus_donation_recurring',
+				stripeSubscriptionId: subscriptionId,
+				subscriptionAmountCents: 1000,
+				subscriptionCurrency: 'usd',
+				subscriptionInterval: 'month',
+				subscriptionCurrentPeriodEnd: null,
+			});
+			const result = await sendWebhook({
+				type: 'invoice.payment_succeeded',
+				data: {
+					object: {
+						id: 'in_donation_recurring',
+						billing_reason: 'subscription_cycle',
+						customer: 'cus_donation_recurring',
+						parent: {subscription_details: {subscription: subscriptionId}},
+					},
+				},
+			});
+			expect(result.received).toBe(true);
+			const me = await createBuilder<{
+				premium_type: number | null;
+				premium_until: string | null;
+			}>(harness, account.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_type).toBe(UserPremiumTypes.NONE);
+			expect(me.premium_until).toBeNull();
+		});
+		test('still renews when only the donor customer id matches and the subscription id does not', async () => {
+			const account = await createTestAccount(harness);
+			const sharedCustomerId = 'cus_donor_and_subscriber';
+			const premiumSubscriptionId = 'sub_premium_beside_donation';
+			await createPaymentRecord({
+				userId: account.userId,
+				subscriptionId: premiumSubscriptionId,
+				priceId: MOCK_PRICES.monthlyUsd,
+				productType: ProductType.MONTHLY_SUBSCRIPTION,
+			});
+			const {DonationRepository} = await import('../../donation/DonationRepository');
+			await new DonationRepository().createDonor({
+				email: '[email protected]',
+				stripeCustomerId: sharedCustomerId,
+				stripeSubscriptionId: 'sub_donation_beside_premium',
+				subscriptionAmountCents: 1000,
+				subscriptionCurrency: 'usd',
+				subscriptionInterval: 'month',
+				subscriptionCurrentPeriodEnd: null,
+			});
+			const result = await sendWebhook({
+				type: 'invoice.payment_succeeded',
+				data: {
+					object: {
+						id: 'in_premium_beside_donation',
+						billing_reason: 'subscription_cycle',
+						customer: sharedCustomerId,
+						parent: {subscription_details: {subscription: premiumSubscriptionId}},
+					},
+				},
+			});
+			expect(result.received).toBe(true);
+			const me = await createBuilder<{
+				premium_type: number | null;
+				premium_until: string | null;
+			}>(harness, account.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_type).toBe(UserPremiumTypes.SUBSCRIPTION);
+			expect(me.premium_until).not.toBeNull();
+		});
+	});
+	describe('mandate.updated', () => {
+		function captureLoggerWarnings(): {
+			messages: Array<unknown>;
+			restore: () => void;
+		} {
+			const activeLogger = Logger.child({}) as unknown as NoopLogger;
+			expect(activeLogger).toBeInstanceOf(NoopLogger);
+			const messages: Array<unknown> = [];
+			const spy = vi.spyOn(activeLogger, 'warn').mockImplementation((...args: Array<unknown>) => {
+				messages.push(args[args.length - 1]);
+			});
+			return {messages, restore: () => spy.mockRestore()};
+		}
+		function revocationWarnings(messages: Array<unknown>): Array<unknown> {
+			return messages.filter((message) => message === MANDATE_REVOKED_WARNING);
+		}
+		test('logs the revocation warning and leaves premium untouched when a mandate goes inactive', async () => {
+			const account = await createTestAccount(harness);
+			const premiumUntil = new Date(Date.now() + 30 * 24 * 60 * 60 * 1000);
+			await createBuilder(harness, account.token)
+				.post(`/test/users/${account.userId}/premium`)
+				.body({
+					premium_type: UserPremiumTypes.SUBSCRIPTION,
+					premium_until: premiumUntil.toISOString(),
+					stripe_subscription_id: 'sub_pix_mandate',
+					stripe_customer_id: 'cus_pix_mandate',
+				})
+				.execute();
+			const warnings = captureLoggerWarnings();
+			try {
+				const result = await sendWebhook({
+					type: 'mandate.updated',
+					data: {
+						object: {
+							id: 'mandate_test_inactive',
+							object: 'mandate',
+							status: 'inactive',
+							payment_method: 'pm_pix_mandate',
+							type: 'multi_use',
+						},
+					},
+				});
+				expect(result.received).toBe(true);
+				expect(revocationWarnings(warnings.messages)).toHaveLength(1);
+			} finally {
+				warnings.restore();
+			}
+			const me = await createBuilder<{
+				premium_type: number | null;
+				premium_until: string | null;
+			}>(harness, account.token)
+				.get('/users/@me')
+				.execute();
+			expect(me.premium_type).toBe(UserPremiumTypes.SUBSCRIPTION);
+			expect(me.premium_until).toBe(premiumUntil.toISOString());
+		});
+		test('does not log the revocation warning for a pending or still-active mandate', async () => {
+			const warnings = captureLoggerWarnings();
+			try {
+				for (const status of ['pending', 'active'] as const) {
+					const result = await sendWebhook({
+						type: 'mandate.updated',
+						data: {
+							object: {
+								id: `mandate_test_${status}`,
+								object: 'mandate',
+								status,
+								payment_method: {id: 'pm_pix_mandate', object: 'payment_method', type: 'pix'},
+								type: 'multi_use',
+							},
+						},
+					});
+					expect(result.received).toBe(true);
+				}
+				expect(revocationWarnings(warnings.messages)).toHaveLength(0);
+			} finally {
+				warnings.restore();
+			}
+		});
+	});
 });

fluxer_api/src/api/stripe/tests/StripeWebhookRefund.test.ts

@@ -49,14 +49,14 @@ describe('Stripe Webhook Refund', () => {
 			.body(payload)
 			.execute();
 	}
-	function useRefundListHandler(chargeId: string): void {
+	function useRefundListHandler(chargeId: string, refunds: Array<Record<string, unknown>> = []): void {
 		server.use(
 			http.get(
 				({request}) => request.url === `https://api.stripe.com/v1/refunds?charge=${chargeId}&limit=100`,
 				() =>
 					HttpResponse.json({
 						object: 'list',
-						data: [],
+						data: refunds,
 						has_more: false,
 						url: '/v1/refunds',
 					}),
@@ -155,6 +155,366 @@ describe('Stripe Webhook Refund', () => {
 			expect(updatedPayment).not.toBeNull();
 			expect(updatedPayment!.status).toBe('refunded');
 		});
+		test('counts a refund once when the same charge.refunded event is redelivered', async () => {
+			const account = await createTestAccount(harness);
+			const userId = createUserID(BigInt(account.userId));
+			const {PaymentRepository} = await import('../../user/repositories/PaymentRepository');
+			const {UserRepository} = await import('../../user/repositories/UserRepository');
+			const paymentRepository = new PaymentRepository();
+			const userRepository = new UserRepository();
+			const paymentIntentId = 'pi_test_refund_retry_123';
+			const checkoutSessionId = 'cs_test_refund_retry_123';
+			const chargeId = 'ch_test_refund_retry_123';
+			await paymentRepository.createPayment({
+				checkout_session_id: checkoutSessionId,
+				user_id: userId,
+				price_id: 'price_test_monthly',
+				product_type: 'monthly_subscription',
+				status: 'completed',
+				is_gift: false,
+				created_at: new Date(),
+			});
+			await paymentRepository.updatePayment({
+				checkout_session_id: checkoutSessionId,
+				payment_intent_id: paymentIntentId,
+				completed_at: new Date(),
+			});
+			useRefundListHandler(chargeId, [
+				{
+					id: 're_test_refund_retry_123',
+					object: 'refund',
+					charge: chargeId,
+					payment_intent: paymentIntentId,
+					amount: 2500,
+					currency: 'brl',
+					status: 'succeeded',
+					created: Math.floor(Date.now() / 1000),
+					metadata: {},
+				},
+			]);
+			const chargeEvent = {
+				type: 'charge.refunded' as const,
+				data: {
+					object: {
+						id: chargeId,
+						payment_intent: paymentIntentId,
+						amount_refunded: 2500,
+					},
+				},
+			};
+			await sendWebhook({...chargeEvent, id: 'evt_test_refund_retry_1'});
+			await sendWebhook({...chargeEvent, id: 'evt_test_refund_retry_2'});
+			const updatedUser = await userRepository.findUnique(userId);
+			expect(updatedUser!.firstRefundAt).not.toBeNull();
+			expect(updatedUser!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+		});
+		test('counts a refund once when charge.refunded lands before the refund record exists', async () => {
+			const account = await createTestAccount(harness);
+			const userId = createUserID(BigInt(account.userId));
+			const {PaymentRepository} = await import('../../user/repositories/PaymentRepository');
+			const {UserRepository} = await import('../../user/repositories/UserRepository');
+			const paymentRepository = new PaymentRepository();
+			const userRepository = new UserRepository();
+			const paymentIntentId = 'pi_test_refund_late_record';
+			const checkoutSessionId = 'cs_test_refund_late_record';
+			const chargeId = 'ch_test_refund_late_record';
+			const refundId = 're_test_refund_late_record';
+			await paymentRepository.createPayment({
+				checkout_session_id: checkoutSessionId,
+				user_id: userId,
+				price_id: 'price_test_monthly',
+				product_type: 'monthly_subscription',
+				status: 'completed',
+				is_gift: false,
+				created_at: new Date(),
+			});
+			await paymentRepository.updatePayment({
+				checkout_session_id: checkoutSessionId,
+				payment_intent_id: paymentIntentId,
+				completed_at: new Date(),
+			});
+			const refund = {
+				id: refundId,
+				object: 'refund',
+				charge: chargeId,
+				payment_intent: paymentIntentId,
+				amount: 2500,
+				currency: 'brl',
+				status: 'succeeded',
+				created: Math.floor(Date.now() / 1000),
+				metadata: {},
+			};
+			const chargeEvent = {
+				type: 'charge.refunded' as const,
+				data: {
+					object: {
+						id: chargeId,
+						payment_intent: paymentIntentId,
+						amount_refunded: 2500,
+					},
+				},
+			};
+			useRefundListHandler(chargeId);
+			await sendWebhook({...chargeEvent, id: 'evt_test_refund_late_record_1'});
+			const afterFallback = await userRepository.findUnique(userId);
+			expect(afterFallback!.firstRefundAt).not.toBeNull();
+			expect(afterFallback!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+			await sendWebhook({
+				id: 'evt_test_refund_late_record_2',
+				type: 'refund.created',
+				data: {object: refund},
+			});
+			useRefundListHandler(chargeId, [refund]);
+			await sendWebhook({...chargeEvent, id: 'evt_test_refund_late_record_3'});
+			const afterRecord = await userRepository.findUnique(userId);
+			expect(afterRecord!.firstRefundAt!.getTime()).toBe(afterFallback!.firstRefundAt!.getTime());
+			expect(afterRecord!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+		});
+		test('does not count a refund Fluxer issued itself against the refund allowance', async () => {
+			const account = await createTestAccount(harness);
+			const userId = createUserID(BigInt(account.userId));
+			const {PaymentRepository} = await import('../../user/repositories/PaymentRepository');
+			const {UserRepository} = await import('../../user/repositories/UserRepository');
+			const paymentRepository = new PaymentRepository();
+			const userRepository = new UserRepository();
+			const paymentIntentId = 'pi_test_refund_system_123';
+			const checkoutSessionId = 'cs_test_refund_system_123';
+			const chargeId = 'ch_test_refund_system_123';
+			await paymentRepository.createPayment({
+				checkout_session_id: checkoutSessionId,
+				user_id: userId,
+				price_id: 'price_test_monthly',
+				product_type: 'monthly_subscription',
+				status: 'completed',
+				is_gift: false,
+				created_at: new Date(),
+			});
+			await paymentRepository.updatePayment({
+				checkout_session_id: checkoutSessionId,
+				payment_intent_id: paymentIntentId,
+				completed_at: new Date(),
+			});
+			useRefundListHandler(chargeId, [
+				{
+					id: 're_test_refund_system_123',
+					object: 'refund',
+					charge: chargeId,
+					payment_intent: paymentIntentId,
+					amount: 2500,
+					currency: 'brl',
+					status: 'succeeded',
+					created: Math.floor(Date.now() / 1000),
+					metadata: {rejection_reason: 'duplicate_active_subscription'},
+				},
+			]);
+			await sendWebhook({
+				type: 'charge.refunded',
+				data: {
+					object: {
+						id: chargeId,
+						payment_intent: paymentIntentId,
+						amount_refunded: 2500,
+					},
+				},
+			});
+			const updatedUser = await userRepository.findUnique(userId);
+			expect(updatedUser!.firstRefundAt).toBeNull();
+			expect(updatedUser!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+		});
+		test('does not count a refund Fluxer issued for a localized card country mismatch', async () => {
+			const account = await createTestAccount(harness);
+			const userId = createUserID(BigInt(account.userId));
+			const {PaymentRepository} = await import('../../user/repositories/PaymentRepository');
+			const {UserRepository} = await import('../../user/repositories/UserRepository');
+			const paymentRepository = new PaymentRepository();
+			const userRepository = new UserRepository();
+			const paymentIntentId = 'pi_test_refund_card_mismatch';
+			const checkoutSessionId = 'cs_test_refund_card_mismatch';
+			const chargeId = 'ch_test_refund_card_mismatch';
+			await paymentRepository.createPayment({
+				checkout_session_id: checkoutSessionId,
+				user_id: userId,
+				price_id: 'price_test_monthly',
+				product_type: 'monthly_subscription',
+				status: 'completed',
+				is_gift: false,
+				created_at: new Date(),
+			});
+			await paymentRepository.updatePayment({
+				checkout_session_id: checkoutSessionId,
+				payment_intent_id: paymentIntentId,
+				completed_at: new Date(),
+			});
+			useRefundListHandler(chargeId, [
+				{
+					id: 're_test_refund_card_mismatch',
+					object: 'refund',
+					charge: chargeId,
+					payment_intent: paymentIntentId,
+					amount: 2500,
+					currency: 'brl',
+					status: 'succeeded',
+					created: Math.floor(Date.now() / 1000),
+					metadata: {rejection_reason: 'localized_card_country_mismatch'},
+				},
+			]);
+			await sendWebhook({
+				type: 'charge.refunded',
+				data: {
+					object: {
+						id: chargeId,
+						payment_intent: paymentIntentId,
+						amount_refunded: 2500,
+					},
+				},
+			});
+			const updatedUser = await userRepository.findUnique(userId);
+			expect(updatedUser!.firstRefundAt).toBeNull();
+			expect(updatedUser!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+			const updatedPayment = await userRepository.getPaymentByPaymentIntent(paymentIntentId);
+			expect(updatedPayment!.status).toBe('refunded');
+		});
+		test('counts only the customer refund when Fluxer issued a later system refund on the same charge', async () => {
+			const account = await createTestAccount(harness);
+			const userId = createUserID(BigInt(account.userId));
+			const {PaymentRepository} = await import('../../user/repositories/PaymentRepository');
+			const {UserRepository} = await import('../../user/repositories/UserRepository');
+			const paymentRepository = new PaymentRepository();
+			const userRepository = new UserRepository();
+			const paymentIntentId = 'pi_test_refund_mixed';
+			const checkoutSessionId = 'cs_test_refund_mixed';
+			const chargeId = 'ch_test_refund_mixed';
+			await paymentRepository.createPayment({
+				checkout_session_id: checkoutSessionId,
+				user_id: userId,
+				price_id: 'price_test_monthly',
+				product_type: 'monthly_subscription',
+				status: 'completed',
+				is_gift: false,
+				created_at: new Date(),
+			});
+			await paymentRepository.updatePayment({
+				checkout_session_id: checkoutSessionId,
+				payment_intent_id: paymentIntentId,
+				completed_at: new Date(),
+			});
+			const nowSeconds = Math.floor(Date.now() / 1000);
+			const chargeEvent = {
+				type: 'charge.refunded' as const,
+				data: {
+					object: {
+						id: chargeId,
+						payment_intent: paymentIntentId,
+						amount_refunded: 2500,
+						refunds: {
+							object: 'list',
+							has_more: false,
+							url: `/v1/charges/${chargeId}/refunds`,
+							data: [
+								{
+									id: 're_test_refund_mixed_customer',
+									object: 'refund',
+									charge: chargeId,
+									payment_intent: paymentIntentId,
+									amount: 1500,
+									currency: 'brl',
+									status: 'succeeded',
+									created: nowSeconds - 600,
+									metadata: {},
+								},
+								{
+									id: 're_test_refund_mixed_system',
+									object: 'refund',
+									charge: chargeId,
+									payment_intent: paymentIntentId,
+									amount: 1000,
+									currency: 'brl',
+									status: 'succeeded',
+									created: nowSeconds,
+									metadata: {rejection_reason: 'duplicate_active_subscription'},
+								},
+							],
+						},
+					},
+				},
+			};
+			await sendWebhook({...chargeEvent, id: 'evt_test_refund_mixed_1'});
+			const afterFirst = await userRepository.findUnique(userId);
+			expect(afterFirst!.firstRefundAt).not.toBeNull();
+			expect(afterFirst!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+			await sendWebhook({...chargeEvent, id: 'evt_test_refund_mixed_2'});
+			const afterRetry = await userRepository.findUnique(userId);
+			expect(afterRetry!.firstRefundAt!.getTime()).toBe(afterFirst!.firstRefundAt!.getTime());
+			expect(afterRetry!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+		});
+		test('counts a second, distinct refund against the allowance after the first one was already counted', async () => {
+			const account = await createTestAccount(harness);
+			const userId = createUserID(BigInt(account.userId));
+			const {PaymentRepository} = await import('../../user/repositories/PaymentRepository');
+			const {UserRepository} = await import('../../user/repositories/UserRepository');
+			const paymentRepository = new PaymentRepository();
+			const userRepository = new UserRepository();
+			const paymentIntentId = 'pi_test_refund_ladder';
+			const checkoutSessionId = 'cs_test_refund_ladder';
+			const chargeId = 'ch_test_refund_ladder';
+			await paymentRepository.createPayment({
+				checkout_session_id: checkoutSessionId,
+				user_id: userId,
+				price_id: 'price_test_monthly',
+				product_type: 'monthly_subscription',
+				status: 'completed',
+				is_gift: false,
+				created_at: new Date(),
+			});
+			await paymentRepository.updatePayment({
+				checkout_session_id: checkoutSessionId,
+				payment_intent_id: paymentIntentId,
+				completed_at: new Date(),
+			});
+			const nowSeconds = Math.floor(Date.now() / 1000);
+			function chargeEventWithRefunds(refunds: Array<Record<string, unknown>>) {
+				return {
+					type: 'charge.refunded' as const,
+					data: {
+						object: {
+							id: chargeId,
+							payment_intent: paymentIntentId,
+							amount_refunded: 2500,
+							refunds: {
+								object: 'list',
+								has_more: false,
+								url: `/v1/charges/${chargeId}/refunds`,
+								data: refunds,
+							},
+						},
+					},
+				};
+			}
+			const firstRefund = {
+				id: 're_test_refund_ladder_1',
+				object: 'refund',
+				charge: chargeId,
+				payment_intent: paymentIntentId,
+				amount: 1200,
+				currency: 'brl',
+				status: 'succeeded',
+				created: nowSeconds - 600,
+				metadata: {},
+			};
+			const secondRefund = {
+				...firstRefund,
+				id: 're_test_refund_ladder_2',
+				amount: 1300,
+				created: nowSeconds,
+			};
+			await sendWebhook({...chargeEventWithRefunds([firstRefund]), id: 'evt_test_refund_ladder_1'});
+			const afterFirst = await userRepository.findUnique(userId);
+			expect(afterFirst!.firstRefundAt).not.toBeNull();
+			expect(afterFirst!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(0);
+			await sendWebhook({...chargeEventWithRefunds([firstRefund, secondRefund]), id: 'evt_test_refund_ladder_2'});
+			const afterSecond = await userRepository.findUnique(userId);
+			expect(afterSecond!.premiumFlags & PremiumFlags.PURCHASE_DISABLED).toBe(PremiumFlags.PURCHASE_DISABLED);
+		});
 		test('falls back to customer ID when payment intent is not indexed (subscription mode)', async () => {
 			const account = await createTestAccount(harness);
 			const userId = createUserID(BigInt(account.userId));

fluxer_api/src/api/test/msw/handlers/StripeApiHandlers.ts

@@ -64,6 +64,14 @@ interface StripeApiMockConfig {
 	paymentMethods?: Record<string, Partial<MockStripePaymentMethod>>;
 	setupIntents?: Record<string, Partial<MockStripeSetupIntent>>;
 	subscriptions?: Record<string, Partial<MockStripeSubscriptionState>>;
+	prices?: Record<string, MockStripePriceOverrides>;
+}
+
+interface MockStripePriceOverrides {
+	unit_amount?: number;
+	currency?: string;
+	interval?: 'month' | 'year';
+	product?: string;
 }
 
 interface SubscriptionScheduleParams {
@@ -302,6 +310,7 @@ interface MockStripeSubscriptionState {
 	customer: string;
 	trial_end: number | null;
 	price_id: string;
+	unit_amount: number;
 	currency: string;
 	interval: 'month' | 'year';
 	item_id: string;
@@ -808,6 +817,7 @@ export function createStripeApiHandlers(config: StripeApiMockConfig = {}): Strip
 			customer: 'cus_test_1',
 			trial_end: null,
 			price_id: 'price_test_1',
+			unit_amount: 2500,
 			currency: 'usd',
 			interval: 'month',
 			item_id: 'si_test_1',
@@ -856,7 +866,7 @@ export function createStripeApiHandlers(config: StripeApiMockConfig = {}): Strip
 						price: {
 							id: subState.price_id,
 							object: 'price',
-							unit_amount: 2500,
+							unit_amount: subState.unit_amount,
 							currency: subState.currency,
 							recurring: {
 								interval: subState.interval,
@@ -1703,28 +1713,31 @@ export function createStripeApiHandlers(config: StripeApiMockConfig = {}): Strip
 		http.get(`${STRIPE_API_BASE}/v1/prices/:id`, ({params}) => {
 			const {id} = params;
 			const normalizedPriceId = String(id).toLowerCase();
+			const overrides = config.prices?.[String(id)];
 			return HttpResponse.json({
 				id,
 				object: 'price',
 				active: true,
-				currency: normalizedPriceId.includes('eur')
-					? 'eur'
-					: normalizedPriceId.includes('brl')
-						? 'brl'
-						: normalizedPriceId.includes('inr')
-							? 'inr'
-							: normalizedPriceId.includes('pln')
-								? 'pln'
-								: normalizedPriceId.includes('try')
-									? 'try'
-									: 'usd',
-				unit_amount: normalizedPriceId.includes('year') ? 4999 : 499,
+				currency:
+					overrides?.currency ??
+					(normalizedPriceId.includes('eur')
+						? 'eur'
+						: normalizedPriceId.includes('brl')
+							? 'brl'
+							: normalizedPriceId.includes('inr')
+								? 'inr'
+								: normalizedPriceId.includes('pln')
+									? 'pln'
+									: normalizedPriceId.includes('try')
+										? 'try'
+										: 'usd'),
+				unit_amount: overrides?.unit_amount ?? (normalizedPriceId.includes('year') ? 4999 : 499),
 				type: 'recurring',
 				recurring: {
-					interval: normalizedPriceId.includes('year') ? 'year' : 'month',
+					interval: overrides?.interval ?? (normalizedPriceId.includes('year') ? 'year' : 'month'),
 					interval_count: 1,
 				},
-				product: 'prod_test_1',
+				product: overrides?.product ?? 'prod_test_1',
 				livemode: false,
 				created: Math.floor(Date.now() / 1000) - 365 * 24 * 60 * 60,
 			});

fluxer_api/src/api/user/UserTraits.test.ts

@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {describe, expect, it} from 'vitest';
+import {isDerivedTrait, isServerManagedTrait, resolveAssignedTraits} from './UserTraits';
+
+describe('UserTraits', () => {
+	it('treats premium as derived rather than assignable', () => {
+		expect(isDerivedTrait('premium')).toBe(true);
+		expect(isDerivedTrait('beta-tester')).toBe(false);
+	});
+
+	it('recognises every trait shape the server manages', () => {
+		expect(isServerManagedTrait('sso')).toBe(true);
+		expect(isServerManagedTrait('sso:acme')).toBe(true);
+		expect(isServerManagedTrait('sso_provider:0123456789abcdef')).toBe(true);
+		expect(isServerManagedTrait('sso_identity:0123456789abcdef')).toBe(true);
+		expect(isServerManagedTrait('registration_pending_approval')).toBe(true);
+		expect(isServerManagedTrait('registration_rejected')).toBe(true);
+		expect(isServerManagedTrait('beta-tester')).toBe(false);
+	});
+
+	it('keeps the operator traits it was given', () => {
+		expect([...resolveAssignedTraits([], ['beta-tester', 'experimental'])]).toEqual(['beta-tester', 'experimental']);
+	});
+
+	it('drops premium because nothing reads the stored value', () => {
+		expect([...resolveAssignedTraits([], ['premium'])]).toEqual([]);
+		expect([...resolveAssignedTraits([], ['beta-tester', 'premium'])]).toEqual(['beta-tester']);
+	});
+
+	it('keeps a premium user premium when the operator saves other traits', () => {
+		expect([...resolveAssignedTraits(['premium'], ['beta-tester'])]).toEqual(['beta-tester']);
+	});
+
+	it('preserves server managed traits the operator did not send', () => {
+		const resolved = resolveAssignedTraits(
+			['sso', 'sso:acme', 'sso_identity:0123456789abcdef', 'beta-tester'],
+			['experimental'],
+		);
+		expect([...resolved].sort()).toEqual(['experimental', 'sso', 'sso:acme', 'sso_identity:0123456789abcdef']);
+	});
+
+	it('keeps a pending approval user pending when their traits are cleared', () => {
+		expect([...resolveAssignedTraits(['registration_pending_approval'], [])]).toEqual([
+			'registration_pending_approval',
+		]);
+	});
+
+	it('refuses to let an operator forge a server managed trait', () => {
+		expect([...resolveAssignedTraits([], ['sso', 'sso_identity:forged'])]).toEqual([]);
+	});
+
+	it('ignores empty trait names', () => {
+		expect([...resolveAssignedTraits([], ['', 'beta-tester'])]).toEqual(['beta-tester']);
+	});
+});

fluxer_api/src/api/user/UserTraits.ts

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+const DERIVED_TRAITS = new Set(['premium']);
+
+const SERVER_MANAGED_TRAITS = new Set(['sso', 'registration_pending_approval', 'registration_rejected']);
+
+const SERVER_MANAGED_TRAIT_PREFIXES = ['sso:', 'sso_provider:', 'sso_identity:'];
+
+export function isDerivedTrait(trait: string): boolean {
+	return DERIVED_TRAITS.has(trait);
+}
+
+export function isServerManagedTrait(trait: string): boolean {
+	return SERVER_MANAGED_TRAITS.has(trait) || SERVER_MANAGED_TRAIT_PREFIXES.some((prefix) => trait.startsWith(prefix));
+}
+
+export function resolveAssignedTraits(current: Iterable<string>, requested: Iterable<string>): Set<string> {
+	const next = new Set<string>();
+	for (const trait of requested) {
+		if (!trait || isDerivedTrait(trait) || isServerManagedTrait(trait)) {
+			continue;
+		}
+		next.add(trait);
+	}
+	for (const trait of current) {
+		if (isServerManagedTrait(trait)) {
+			next.add(trait);
+		}
+	}
+	return next;
+}

fluxer_api/src/api/user/services/EmailChangeService.ts

@@ -178,7 +178,7 @@ export class EmailChangeService {
 		}
 		const hasValidDns = await emailDnsValidation.hasValidDnsRecords(trimmedEmail);
 		if (!hasValidDns) {
-			throw InputValidationError.fromCode('new_email', ValidationErrorCodes.INVALID_EMAIL_ADDRESS);
+			throw InputValidationError.fromCode('new_email', ValidationErrorCodes.EMAIL_DOMAIN_CANNOT_RECEIVE_MAIL);
 		}
 		const existing = await users.findByEmail(trimmedEmail.toLowerCase());
 		if (existing && existing.id !== user.id) {

fluxer_api/src/api/worker/tasks/HarvestUserData.test.ts

@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {describe, expect, it} from 'vitest';
+import {type ChannelID, createChannelID, createMessageID, createUserID, type MessageID} from '../../BrandedTypes';
+import {harvestMessages} from './HarvestUserData';
+
+const AUTHOR = createUserID(1000000000000000000n);
+
+function makeRepository(refs: Array<{channelId: ChannelID; messageId: MessageID}>, missing = new Set<string>()) {
+	let pages = 0;
+	return {
+		pages: () => pages,
+		listMessagesByAuthor: async (_userId: typeof AUTHOR, limit: number, lastMessageId?: MessageID) => {
+			pages++;
+			const start = lastMessageId ? refs.findIndex((r) => r.messageId === lastMessageId) + 1 : 0;
+			return refs.slice(start, start + limit);
+		},
+		getMessage: async (_channelId: ChannelID, messageId: MessageID) =>
+			missing.has(messageId.toString()) ? null : {content: `body ${messageId.toString()}`, attachments: undefined},
+	};
+}
+
+function refsAcross(channelCount: number, perChannel: number) {
+	const out: Array<{channelId: ChannelID; messageId: MessageID}> = [];
+	let id = 1500000000000000000n;
+	for (let c = 0; c < channelCount; c++) {
+		const channelId = createChannelID(2000000000000000000n + BigInt(c));
+		for (let m = 0; m < perChannel; m++) {
+			out.push({channelId, messageId: createMessageID(id)});
+			id += 1n;
+		}
+	}
+	return out;
+}
+
+describe('harvestMessages', () => {
+	it('reads past a single page instead of stopping at one query', async () => {
+		const refs = refsAcross(1, 2500);
+		const repo = makeRepository(refs);
+		const result = await harvestMessages(repo, AUTHOR, Date.now(), null);
+		expect(result.totalMessages).toBe(2500);
+		expect(repo.pages()).toBeGreaterThan(1);
+	});
+
+	it('groups every message under its own channel', async () => {
+		const repo = makeRepository(refsAcross(3, 4));
+		const result = await harvestMessages(repo, AUTHOR, Date.now(), null);
+		expect(result.channelMessagesMap.size).toBe(3);
+		for (const messages of result.channelMessagesMap.values()) {
+			expect(messages).toHaveLength(4);
+		}
+		expect(result.totalMessages).toBe(12);
+	});
+
+	it('leaves out a message the repository cannot return', async () => {
+		const refs = refsAcross(1, 5);
+		const repo = makeRepository(refs, new Set([refs[2].messageId.toString()]));
+		const result = await harvestMessages(repo, AUTHOR, Date.now(), null);
+		expect(result.totalMessages).toBe(4);
+	});
+
+	it('returns an empty map for an account with no messages', async () => {
+		const repo = makeRepository([]);
+		const result = await harvestMessages(repo, AUTHOR, Date.now(), null);
+		expect(result.totalMessages).toBe(0);
+		expect(result.channelMessagesMap.size).toBe(0);
+	});
+});

fluxer_api/src/api/worker/tasks/HarvestUserData.ts

@@ -171,6 +171,10 @@ interface ArchiveResult {
 	downloadUrl: string;
 }
 
+// A harvest is every message the account wrote, so the read pages to the end of
+// the account rather than stopping at a count. The page size is what bounds one
+// query, not what bounds the archive.
+const HARVEST_MESSAGE_CHUNK_SIZE = 1000;
 const CONCURRENT_MESSAGE_LIMIT = 10;
 const INITIAL_PROGRESS = 5;
 const MESSAGES_PROGRESS_MAX = 55;
@@ -226,11 +230,12 @@ interface HarvestMessagesFilterArgs {
 	findChannel: (channelId: ChannelID) => Promise<Channel | null>;
 }
 
-async function harvestMessages(
+export async function harvestMessages(
 	channelRepository: {
 		listMessagesByAuthor: (
 			userId: UserID,
 			limit: number,
+			lastMessageId?: MessageID,
 		) => Promise<
 			Array<{
 				channelId: ChannelID;
@@ -250,24 +255,78 @@ async function harvestMessages(
 	filterArgs: HarvestMessagesFilterArgs | null,
 ): Promise<HarvestMessageResult> {
 	const channelMessagesMap = new Map<string, Array<HarvestedMessage>>();
+	const channelEligibility = filterArgs ? new Map<string, boolean>() : null;
 	Logger.debug('Fetching all user messages');
 	const startFetchTime = Date.now();
-	const messageRefs = await channelRepository.listMessagesByAuthor(userId, 100000);
-	Logger.debug(
-		{
-			totalMessages: messageRefs.length,
-			fetchElapsed: Date.now() - startFetchTime,
-			totalElapsed: Date.now() - startTime,
-		},
-		'All messages retrieved',
-	);
-	if (messageRefs.length === 0) {
-		return {channelMessagesMap, totalMessages: 0};
-	}
-	const channelEligibility = filterArgs ? new Map<string, boolean>() : null;
-	const filteredRefs: Array<{channelId: ChannelID; messageId: MessageID}> = [];
-	if (filterArgs) {
-		for (const ref of messageRefs) {
+	let lastMessageId: MessageID | undefined;
+	let scannedMessages = 0;
+	let totalMessages = 0;
+
+	const readMessage = async ({
+		channelId,
+		messageId,
+	}: {
+		channelId: ChannelID;
+		messageId: MessageID;
+	}): Promise<ChannelHarvestResult | null> => {
+		try {
+			const message = await channelRepository.getMessage(channelId, messageId);
+			if (!message) {
+				Logger.warn(
+					{channelId: channelId.toString(), messageId: messageId.toString()},
+					'Message not found during harvest',
+				);
+				return null;
+			}
+			const timestamp = snowflakeToDate(messageId);
+			const attachments: Array<HarvestedAttachment> = [];
+			if (message.attachments) {
+				for (const attachment of message.attachments) {
+					attachments.push({
+						attachment_id: attachment.id.toString(),
+						filename: attachment.filename,
+						size: attachment.size.toString(),
+						content_type: attachment.contentType,
+						content_hash: null,
+						archive_path: null,
+						cdn_url: makeAttachmentCdnUrl(channelId, attachment.id, attachment.filename),
+						width: attachment.width,
+						height: attachment.height,
+					});
+				}
+			}
+			return {
+				channelId: channelId.toString(),
+				messageData: {
+					id: messageId.toString(),
+					timestamp: timestamp.toISOString(),
+					content: message.content ?? '',
+					attachments,
+				},
+			};
+		} catch (error) {
+			Logger.error(
+				{error, channelId: channelId.toString(), messageId: messageId.toString()},
+				'Failed to process message during harvest',
+			);
+			return null;
+		}
+	};
+
+	while (true) {
+		const page = await channelRepository.listMessagesByAuthor(userId, HARVEST_MESSAGE_CHUNK_SIZE, lastMessageId);
+		if (page.length === 0) {
+			break;
+		}
+		scannedMessages += page.length;
+		lastMessageId = page[page.length - 1].messageId;
+
+		const pageRefs: Array<{channelId: ChannelID; messageId: MessageID}> = [];
+		for (const ref of page) {
+			if (!filterArgs) {
+				pageRefs.push(ref);
+				continue;
+			}
 			const ts = snowflakeToDate(ref.messageId).getTime();
 			if (!isTimestampInWindow(ts, filterArgs.filter)) {
 				continue;
@@ -280,76 +339,41 @@ async function harvestMessages(
 				channelEligibility!.set(channelIdStr, eligible);
 			}
 			if (eligible) {
-				filteredRefs.push(ref);
+				pageRefs.push(ref);
 			}
 		}
-	} else {
-		filteredRefs.push(...messageRefs);
-	}
-	if (filteredRefs.length === 0) {
-		return {channelMessagesMap, totalMessages: 0};
-	}
-	const messages: Array<ChannelHarvestResult> = [];
-	for (let i = 0; i < filteredRefs.length; i += CONCURRENT_MESSAGE_LIMIT) {
-		const batch = filteredRefs.slice(i, i + CONCURRENT_MESSAGE_LIMIT);
-		const batchPromises = batch.map(async ({channelId, messageId}): Promise<ChannelHarvestResult | null> => {
-			try {
-				const message = await channelRepository.getMessage(channelId, messageId);
-				if (!message) {
-					Logger.warn(
-						{channelId: channelId.toString(), messageId: messageId.toString()},
-						'Message not found during harvest',
-					);
-					return null;
+
+		for (let i = 0; i < pageRefs.length; i += CONCURRENT_MESSAGE_LIMIT) {
+			const batchResults = await Promise.all(pageRefs.slice(i, i + CONCURRENT_MESSAGE_LIMIT).map(readMessage));
+			for (const result of batchResults) {
+				if (result === null) {
+					continue;
 				}
-				const timestamp = snowflakeToDate(messageId);
-				const attachments: Array<HarvestedAttachment> = [];
-				if (message.attachments) {
-					for (const attachment of message.attachments) {
-						attachments.push({
-							attachment_id: attachment.id.toString(),
-							filename: attachment.filename,
-							size: attachment.size.toString(),
-							content_type: attachment.contentType,
-							content_hash: null,
-							archive_path: null,
-							cdn_url: makeAttachmentCdnUrl(channelId, attachment.id, attachment.filename),
-							width: attachment.width,
-							height: attachment.height,
-						});
-					}
+				let bucket = channelMessagesMap.get(result.channelId);
+				if (!bucket) {
+					bucket = [];
+					channelMessagesMap.set(result.channelId, bucket);
 				}
-				return {
-					channelId: channelId.toString(),
-					messageData: {
-						id: messageId.toString(),
-						timestamp: timestamp.toISOString(),
-						content: message.content ?? '',
-						attachments,
-					},
-				};
-			} catch (error) {
-				Logger.error(
-					{error, channelId: channelId.toString(), messageId: messageId.toString()},
-					'Failed to process message during harvest',
-				);
-				return null;
-			}
-		});
-		const batchResults = await Promise.all(batchPromises);
-		for (const result of batchResults) {
-			if (result !== null) {
-				messages.push(result);
+				bucket.push(result.messageData);
+				totalMessages++;
 			}
 		}
-	}
-	for (const {channelId, messageData} of messages) {
-		if (!channelMessagesMap.has(channelId)) {
-			channelMessagesMap.set(channelId, []);
+
+		if (page.length < HARVEST_MESSAGE_CHUNK_SIZE) {
+			break;
 		}
-		channelMessagesMap.get(channelId)!.push(messageData);
 	}
-	return {channelMessagesMap, totalMessages: messages.length};
+
+	Logger.debug(
+		{
+			scannedMessages,
+			totalMessages,
+			fetchElapsed: Date.now() - startFetchTime,
+			totalElapsed: Date.now() - startTime,
+		},
+		'All messages retrieved',
+	);
+	return {channelMessagesMap, totalMessages};
 }
 
 function buildUserDataJson(params: UserDataJsonParams) {

fluxer_api/vitest.config.ts

@@ -28,6 +28,12 @@ const MODULE_REGISTRY_TEST_FILES = [
 	'src/api/risk/__tests__/AccountPolicyService.test.ts',
 ];
 
+const INSTANCE_POLICY_TEST_FILES = [
+	'src/api/admin/tests/InstanceConfigPendingRegistrationApproval.test.ts',
+	'src/api/auth/tests/DeferredPhoneGate.test.ts',
+	'src/api/instance/tests/SingleCommunityService.test.ts',
+];
+
 const sharedExclude = [
 	...configDefaults.exclude,
 	'pkgs/**',
@@ -76,7 +82,7 @@ export default defineConfig({
 					...sharedTestConfig,
 					name: 'api',
 					include: ['src/**/*.{test,spec}.{ts,tsx}'],
-					exclude: [...sharedExclude, ...MODULE_REGISTRY_TEST_FILES],
+					exclude: [...sharedExclude, ...MODULE_REGISTRY_TEST_FILES, ...INSTANCE_POLICY_TEST_FILES],
 					isolate: false,
 				},
 			},
@@ -90,6 +96,16 @@ export default defineConfig({
 					isolate: true,
 				},
 			},
+			{
+				plugins: [tsconfigPaths()],
+				test: {
+					...sharedTestConfig,
+					name: 'api-instance-policy',
+					include: INSTANCE_POLICY_TEST_FILES,
+					exclude: sharedExclude,
+					isolate: true,
+				},
+			},
 		],
 	},
 });

fluxer_app/scripts/add-data-flx-attributes.mjs

@@ -11,6 +11,7 @@ const JSX_EXTENSIONS = new Set(['.tsx', '.jsx']);
 const SKIP_DIRS = new Set(['node_modules', 'dist', 'coverage', '.cache', '.swc']);
 const GENERATED_FILES = new Set([join(SOURCE_DIR, 'features', 'ui', 'components', 'SVGMasks.tsx')]);
 const NON_THEMEABLE_IDENTIFIERS = new Set([
+	'AppI18nProvider',
 	'Fragment',
 	'I18nProvider',
 	'Outlet',

fluxer_app/src/app/App.tsx

@@ -23,6 +23,7 @@ import {type LayoutVariant, LayoutVariantProvider} from '@app/features/app/state
 import RuntimeCrash from '@app/features/app/state/RuntimeCrash';
 import {showMyselfTypingHelper} from '@app/features/devtools/utils/ShowMyselfTypingHelper';
 import GatewayConnection from '@app/features/gateway/transport/GatewayConnection';
+import {AppI18nProvider} from '@app/features/i18n/components/AppI18nProvider';
 import MemberSidebar from '@app/features/member/state/MemberSidebar';
 import {startDeepLinkHandling} from '@app/features/navigation/utils/DeepLinkUtils';
 import {Outlet, RouterProvider} from '@app/features/platform/components/router/RouterReact';
@@ -60,7 +61,6 @@ import {useStopFlashFrameOnFocus} from '@app/features/window/hooks/useStopFlashF
 import {useWindowEventListeners} from '@app/features/window/hooks/useWindowEventListeners';
 import {i18n} from '@lingui/core';
 import {msg} from '@lingui/core/macro';
-import {I18nProvider} from '@lingui/react';
 import {useLingui} from '@lingui/react/macro';
 import {IconContext} from '@phosphor-icons/react';
 import {reaction} from 'mobx';
@@ -239,7 +239,7 @@ export const App = observer((): React.ReactElement => {
 		return () => detach?.();
 	}, []);
 	return (
-		<I18nProvider i18n={i18n}>
+		<AppI18nProvider i18n={i18n}>
 			<IconContext.Provider value={{color: 'currentColor', weight: 'fill'}}>
 				<PremiumCheckoutReturnWatcher data-flx="app.app.premium-checkout-return-watcher" />
 				<DndContext data-flx="app.app.dnd-context">
@@ -250,6 +250,6 @@ export const App = observer((): React.ReactElement => {
 					</RouterProvider>
 				</DndContext>
 			</IconContext.Provider>
-		</I18nProvider>
+		</AppI18nProvider>
 	);
 });

fluxer_app/src/env.d.ts

@@ -18,6 +18,8 @@ interface FluxerDebugApi {
 	getClientInfoObjectSync?: () => unknown;
 	getVoiceSubscriptionDebug?: () => Promise<unknown>;
 	getVoiceSubscriptionDebugJson?: () => Promise<string>;
+	getTranslationDomGuardStats?: () => unknown;
+	uninstallTranslationDomGuard?: () => boolean;
 }
 
 type FluxerDebugGlobal = Record<string, unknown> & FluxerDebugApi;

fluxer_app/src/features/app/components/dialogs/components/plutonium/SubscriptionCard.tsx

@@ -2,6 +2,7 @@
 
 import {ConfirmModal} from '@app/features/app/components/dialogs/ConfirmModal';
 import {PerksButton} from '@app/features/app/components/dialogs/components/PerksButton';
+import {useSubscriptionActions} from '@app/features/app/components/dialogs/components/plutonium/hooks/useSubscriptionActions';
 import type {GracePeriodInfo} from '@app/features/app/components/dialogs/components/plutonium/hooks/useSubscriptionStatus';
 import statusStyles from '@app/features/app/components/dialogs/components/plutonium/PurchaseHistoryStatus.module.css';
 import styles from '@app/features/app/components/dialogs/components/plutonium/SubscriptionCard.module.css';
@@ -11,6 +12,7 @@ import {
 	PREMIUM_PRODUCT_NAME,
 } from '@app/features/app/config/I18nDisplayConstants';
 import {JOIN_COMMUNITY_DESCRIPTOR} from '@app/features/i18n/utils/CommonMessageDescriptors';
+import PremiumState from '@app/features/premium/state/PremiumState';
 import {
 	CLAIM_ACCOUNT_TO_PURCHASE_OR_REDEEM_PREMIUM_DESCRIPTOR,
 	MANAGE_SUBSCRIPTION_DESCRIPTOR,
@@ -21,6 +23,7 @@ import {Button} from '@app/features/ui/button/Button';
 import * as ModalCommands from '@app/features/ui/commands/ModalCommands';
 import {modal} from '@app/features/ui/commands/ModalCommands';
 import {Tooltip} from '@app/features/ui/tooltip/Tooltip';
+import Users from '@app/features/user/state/Users';
 import {getFormattedLongDate} from '@fluxer/date_utils/src/DateFormatting';
 import type {PendingSubscriptionChangeResponse} from '@fluxer/schema/src/domains/premium/PremiumSchemas';
 import {msg} from '@lingui/core/macro';
@@ -55,6 +58,14 @@ const SWITCH_TO_MONTHLY_DESCRIPTOR = msg({
 	message: 'Switch to monthly',
 	comment: 'Button confirming a change to monthly subscription billing.',
 });
+const SWITCH_TO_THE_NEW_PRICE_TITLE_DESCRIPTOR = msg({
+	message: 'Switch to the new price?',
+	comment: 'Billing confirmation title for moving an active subscription down to the current price.',
+});
+const SWITCH_PRICE_DESCRIPTOR = msg({
+	message: 'Switch price',
+	comment: 'Button confirming a move of an active subscription down to the current price.',
+});
 const NOT_NOW_DESCRIPTOR = msg({
 	message: 'Not now',
 	comment: 'Button that cancels a subscription billing change.',
@@ -171,6 +182,7 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 		purchaseDisabledTooltip,
 	}) => {
 		const {i18n} = useLingui();
+		const {loadingSwitchToListPrice, handleSwitchToListPrice} = useSubscriptionActions();
 		const {isInGracePeriod, isExpired: isFullyExpired, graceEndDate} = gracePeriodInfo;
 		const tooltipText: string | (() => React.ReactNode) =
 			purchaseDisabledTooltip != null
@@ -184,9 +196,26 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 		const effectiveYearlyPrice =
 			billingCycle === 'yearly' && currentSubscriptionPriceLabel ? currentSubscriptionPriceLabel : yearlyPrice;
 		const hasPendingSubscriptionChange = pendingSubscriptionChange != null && !premiumWillCancel;
+		const currentUserId = Users.currentUser?.id;
+		const listPriceSwitch =
+			currentUserId != null && PremiumState.loadedForUserId === currentUserId
+				? (PremiumState.state?.billing.list_price_switch ?? null)
+				: null;
+		const listPriceNewLabel = listPriceSwitch
+			? formatMinorUnitPrice(listPriceSwitch.list_amount_minor, listPriceSwitch.currency, locale)
+			: null;
+		const listPriceCurrentLabel = listPriceSwitch
+			? formatMinorUnitPrice(listPriceSwitch.current_amount_minor, listPriceSwitch.currency, locale)
+			: null;
+		const listPriceEffectiveDate = listPriceSwitch?.effective_at
+			? getFormattedLongDate(listPriceSwitch.effective_at, locale)
+			: null;
+		const hasPendingListPriceSwitch = listPriceSwitch?.pending === true && !premiumWillCancel;
 		const pendingChangeDate = pendingSubscriptionChange
 			? getFormattedLongDate(new Date(pendingSubscriptionChange.effective_at), locale)
-			: null;
+			: hasPendingListPriceSwitch
+				? listPriceEffectiveDate
+				: null;
 		const pendingInitialPriceLabel = pendingSubscriptionChange
 			? formatMinorUnitPrice(pendingSubscriptionChange.initial_amount_minor, pendingSubscriptionChange.currency, locale)
 			: null;
@@ -200,6 +229,26 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 		const pendingCreditPriceLabel = pendingSubscriptionChange
 			? formatMinorUnitPrice(pendingSubscriptionChange.credit_amount_minor, pendingSubscriptionChange.currency, locale)
 			: null;
+		const canSwitchToListPrice =
+			listPriceSwitch?.available === true &&
+			!premiumWillCancel &&
+			!hasPendingSubscriptionChange &&
+			listPriceNewLabel != null &&
+			listPriceCurrentLabel != null &&
+			listPriceEffectiveDate != null;
+		const shouldSuggestCancelingPendingChange =
+			listPriceSwitch?.available === false &&
+			listPriceSwitch.reason === 'conflicting_pending_change' &&
+			listPriceSwitch.list_amount_minor != null &&
+			listPriceSwitch.current_amount_minor != null &&
+			listPriceSwitch.list_amount_minor < listPriceSwitch.current_amount_minor;
+		const shouldMentionListPriceWhileCancelling =
+			listPriceSwitch?.available === false &&
+			listPriceSwitch.reason === 'subscription_cancelling' &&
+			listPriceSwitch.list_amount_minor != null &&
+			listPriceSwitch.current_amount_minor != null &&
+			listPriceSwitch.list_amount_minor < listPriceSwitch.current_amount_minor;
+		const pendingTargetPriceLabel = hasPendingListPriceSwitch ? listPriceNewLabel : null;
 		const grandfatheredTooltip =
 			isCurrentSubscriptionGrandfathered && currentSubscriptionListPriceLabel
 				? i18n._(LEGACY_RATE_WITH_PRICE_DESCRIPTOR, {currentSubscriptionListPriceLabel})
@@ -314,6 +363,32 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 				yearlyAmountMinor,
 			],
 		);
+		const handleConfirmSwitchToListPrice = useCallback(() => {
+			ModalCommands.push(
+				modal(() => (
+					<ConfirmModal
+						title={i18n._(SWITCH_TO_THE_NEW_PRICE_TITLE_DESCRIPTOR)}
+						description={
+							<Trans comment="Billing confirmation body for moving an active subscription down to the current price. {listPriceEffectiveDate} is a date, and {listPriceCurrentLabel} and {listPriceNewLabel} are currency amounts, all already formatted and localized by code; never write a date or an amount into the translation.">
+								On{' '}
+								<strong data-flx="app.plutonium.subscription-card.handle-confirm-switch-to-list-price.strong">
+									{listPriceEffectiveDate}
+								</strong>{' '}
+								your subscription moves from {listPriceCurrentLabel} to {listPriceNewLabel}. Nothing is charged today,
+								and the rest of your subscription stays exactly as it is.
+							</Trans>
+						}
+						primaryText={i18n._(SWITCH_PRICE_DESCRIPTOR)}
+						primaryVariant="primary"
+						secondaryText={i18n._(NOT_NOW_DESCRIPTOR)}
+						onPrimary={async () => {
+							await handleSwitchToListPrice();
+						}}
+						data-flx="app.plutonium.subscription-card.handle-confirm-switch-to-list-price.confirm-modal"
+					/>
+				)),
+			);
+		}, [handleSwitchToListPrice, i18n, listPriceCurrentLabel, listPriceEffectiveDate, listPriceNewLabel]);
 		const wrapIfDisabled = (element: React.ReactElement, key: string, disabled: boolean) =>
 			disabled ? (
 				<Tooltip key={key} text={tooltipText} data-flx="app.plutonium.subscription-card.wrap-if-disabled.tooltip">
@@ -498,8 +573,7 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 							)}
 						</div>
 						{!isVisionary &&
-							hasPendingSubscriptionChange &&
-							pendingSubscriptionChange &&
+							(hasPendingSubscriptionChange || hasPendingListPriceSwitch) &&
 							pendingChangeDate &&
 							!isInGracePeriod &&
 							!isFullyExpired &&
@@ -508,7 +582,20 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 									className={styles.pendingChangeInfo}
 									data-flx="app.plutonium.subscription-card.pending-change-info"
 								>
-									{pendingSubscriptionChange.target_billing_cycle === 'yearly' ? (
+									{hasPendingListPriceSwitch ? (
+										pendingTargetPriceLabel ? (
+											<Trans comment="Plutonium subscription card line shown when a move to a lower price is scheduled. {pendingChangeDate} is a date and {pendingTargetPriceLabel} is a currency amount, both already formatted and localized by code; never write a date or an amount into the translation.">
+												New price scheduled for{' '}
+												<strong data-flx="app.plutonium.subscription-card.strong--13">{pendingChangeDate}</strong>.
+												Renewals will be {pendingTargetPriceLabel} from then on.
+											</Trans>
+										) : (
+											<Trans comment="Plutonium subscription card line shown when a move to a lower price is scheduled but the new amount is unknown. {pendingChangeDate} is a date already formatted and localized by code; never write a date into the translation.">
+												New price scheduled for{' '}
+												<strong data-flx="app.plutonium.subscription-card.strong--13">{pendingChangeDate}</strong>.
+											</Trans>
+										)
+									) : pendingSubscriptionChange?.target_billing_cycle === 'yearly' ? (
 										pendingInitialPriceLabel && pendingRecurringPriceLabel ? (
 											pendingCreditPriceLabel ? (
 												<Trans>
@@ -546,6 +633,59 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 									)}
 								</div>
 							)}
+						{!isVisionary &&
+							shouldSuggestCancelingPendingChange &&
+							!isInGracePeriod &&
+							!isFullyExpired &&
+							!isGiftSubscription && (
+								<div
+									className={styles.pendingChangeInfo}
+									data-flx="app.plutonium.subscription-card.list-price-switch-blocked-info"
+								>
+									<Trans comment="Plutonium subscription card hint shown to a subscriber who could move to a lower price but has another billing change already scheduled.">
+										Cancel the scheduled change to move to the current price instead.
+									</Trans>
+								</div>
+							)}
+						{!isVisionary &&
+							shouldMentionListPriceWhileCancelling &&
+							listPriceNewLabel &&
+							premiumUntil &&
+							!isInGracePeriod &&
+							!isFullyExpired &&
+							!isGiftSubscription &&
+							(() => {
+								const cancelDate = getFormattedLongDate(premiumUntil, locale);
+								return (
+									<div
+										className={styles.pendingChangeInfo}
+										data-flx="app.plutonium.subscription-card.list-price-switch-cancelling-info"
+									>
+										<Trans comment="Plutonium subscription card line shown to a subscriber on a legacy price whose subscription is already set to cancel. {cancelDate} is a date and {listPriceNewLabel} is a currency amount, both already formatted and localized by code; never write a date or an amount into the translation.">
+											Your subscription still ends on{' '}
+											<strong data-flx="app.plutonium.subscription-card.strong--15">{cancelDate}</strong>. The current
+											price is now {listPriceNewLabel}. If you reactivate, you can switch to it from here.
+										</Trans>
+									</div>
+								);
+							})()}
+						{!isVisionary &&
+							canSwitchToListPrice &&
+							listPriceEffectiveDate &&
+							!isInGracePeriod &&
+							!isFullyExpired &&
+							!isGiftSubscription && (
+								<div
+									className={styles.pendingChangeInfo}
+									data-flx="app.plutonium.subscription-card.list-price-switch-info"
+								>
+									<Trans comment="Plutonium subscription card line offering a move to a lower price. {listPriceEffectiveDate} is a date already formatted and localized by code; never write a date into the translation.">
+										A lower price is available. Switching takes effect on{' '}
+										<strong data-flx="app.plutonium.subscription-card.strong--14">{listPriceEffectiveDate}</strong> and
+										changes nothing else.
+									</Trans>
+								</div>
+							)}
 						{!isVisionary &&
 							premiumUntil &&
 							!premiumWillCancel &&
@@ -628,6 +768,7 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 								{shouldUseChangePlanQuickAction &&
 									targetBillingCycle &&
 									!hasPendingSubscriptionChange &&
+									!hasPendingListPriceSwitch &&
 									wrapIfDisabled(
 										<Button
 											variant="secondary"
@@ -651,7 +792,21 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 										'change-plan',
 										purchaseDisabled,
 									)}
-								{hasPendingSubscriptionChange && (
+								{canSwitchToListPrice && listPriceNewLabel && (
+									<Button
+										variant="secondary"
+										onClick={handleConfirmSwitchToListPrice}
+										submitting={loadingSwitchToListPrice}
+										small
+										className={styles.actionButton}
+										data-flx="app.plutonium.subscription-card.action-button.confirm-switch-to-list-price"
+									>
+										<Trans comment="Billing button that opens confirmation to move the subscription down to the current price. {listPriceNewLabel} is the localized new price.">
+											Switch to {listPriceNewLabel}
+										</Trans>
+									</Button>
+								)}
+								{(hasPendingSubscriptionChange || hasPendingListPriceSwitch) && (
 									<Button
 										variant="secondary"
 										onClick={handleCancelPendingSubscriptionChange}
@@ -660,7 +815,11 @@ export const SubscriptionCard: React.FC<SubscriptionCardProps> = observer(
 										className={styles.actionButton}
 										data-flx="app.plutonium.subscription-card.action-button.cancel-pending-subscription-change"
 									>
-										{pendingSubscriptionChange?.target_billing_cycle === 'yearly' ? (
+										{hasPendingListPriceSwitch ? (
+											<Trans comment="Billing button that cancels a scheduled move to a lower subscription price.">
+												Cancel price change
+											</Trans>
+										) : pendingSubscriptionChange?.target_billing_cycle === 'yearly' ? (
 											<Trans comment="Billing button that cancels a scheduled yearly upgrade.">
 												Cancel yearly upgrade
 											</Trans>

fluxer_app/src/features/app/components/dialogs/components/plutonium/hooks/usePremiumData.ts

@@ -106,6 +106,9 @@ export const usePremiumData = (
 		currentSubscriptionPrice,
 		currentSubscriptionPriceLabel,
 		currentSubscriptionListPriceLabel,
-		isCurrentSubscriptionGrandfathered: currentSubscriptionPrice?.is_grandfathered ?? false,
+		isCurrentSubscriptionGrandfathered:
+			currentSubscriptionPrice?.is_grandfathered === true &&
+			(currentSubscriptionPrice.list_amount_minor == null ||
+				currentSubscriptionPrice.list_amount_minor > currentSubscriptionPrice.amount_minor),
 	};
 };

fluxer_app/src/features/app/components/dialogs/components/plutonium/hooks/useSubscriptionActions.ts

@@ -5,6 +5,8 @@ import {Logger} from '@app/features/platform/utils/AppLogger';
 import * as PremiumCommands from '@app/features/premium/commands/PremiumCommands';
 import * as ToastCommands from '@app/features/ui/commands/ToastCommands';
 import {openExternalUrl} from '@app/features/ui/utils/NativeUtils';
+import * as LocaleUtils from '@app/features/user/utils/LocaleUtils';
+import {getFormattedLongDate} from '@fluxer/date_utils/src/DateFormatting';
 import {msg} from '@lingui/core/macro';
 import {useLingui} from '@lingui/react/macro';
 import {useCallback, useState} from 'react';
@@ -91,6 +93,31 @@ const CANCEL_PENDING_CHANGE_FAILED_MESSAGE_DESCRIPTOR = msg({
 	comment:
 		'Body of the generic fallback error modal shown when canceling a scheduled Plutonium billing cycle change fails.',
 });
+const YOUR_SUBSCRIPTION_WILL_MOVE_TO_THE_NEW_PRICE_DESCRIPTOR = msg({
+	message: 'Your subscription moves to the new price on {effectiveDate}.',
+	comment:
+		'Toast success shown after a Plutonium subscription is scheduled to move down to the current price. {effectiveDate} is the localized date the new price starts.',
+});
+const THE_NEW_PRICE_IS_ALREADY_SCHEDULED_DESCRIPTOR = msg({
+	message: 'The new price is already scheduled for {effectiveDate}.',
+	comment:
+		'Toast success shown when a move down to the current price was already scheduled by an earlier request. {effectiveDate} is the localized date the new price starts.',
+});
+const SWITCH_TO_LIST_PRICE_UNAVAILABLE_DESCRIPTOR = msg({
+	message: "Your subscription can't move to the new price right now.",
+	comment:
+		'Toast error shown when the server refuses to move a Plutonium subscription down to the current price, whatever the reason.',
+});
+const SWITCH_TO_LIST_PRICE_FAILED_TITLE_DESCRIPTOR = msg({
+	message: "Couldn't change your price",
+	comment:
+		'Title of the generic fallback error modal shown when moving a Plutonium subscription down to the current price fails.',
+});
+const SWITCH_TO_LIST_PRICE_FAILED_MESSAGE_DESCRIPTOR = msg({
+	message: 'Something went wrong while changing your price. Please try again in a moment.',
+	comment:
+		'Body of the generic fallback error modal shown when moving a Plutonium subscription down to the current price fails.',
+});
 const logger = new Logger('useSubscriptionActions');
 export const useSubscriptionActions = (countryCode?: string | null) => {
 	const {i18n} = useLingui();
@@ -100,6 +127,7 @@ export const useSubscriptionActions = (countryCode?: string | null) => {
 	const [loadingEndGrace, setLoadingEndGrace] = useState(false);
 	const [loadingChangeBillingCycle, setLoadingChangeBillingCycle] = useState<'monthly' | 'yearly' | null>(null);
 	const [loadingCancelPendingChange, setLoadingCancelPendingChange] = useState(false);
+	const [loadingSwitchToListPrice, setLoadingSwitchToListPrice] = useState(false);
 	const handleOpenCustomerPortal = useCallback(async () => {
 		setLoadingPortal(true);
 		try {
@@ -213,6 +241,36 @@ export const useSubscriptionActions = (countryCode?: string | null) => {
 		},
 		[countryCode, i18n],
 	);
+	const handleSwitchToListPrice = useCallback(async () => {
+		setLoadingSwitchToListPrice(true);
+		try {
+			const result = await PremiumCommands.switchSubscriptionToListPrice();
+			await PremiumCommands.refreshPremiumState(countryCode ?? undefined);
+			if (result.status === 'ineligible') {
+				logger.warn('List price switch refused', {reason: result.reason});
+				ToastCommands.error(i18n._(SWITCH_TO_LIST_PRICE_UNAVAILABLE_DESCRIPTOR));
+				return;
+			}
+			const effectiveDate = getFormattedLongDate(result.effective_at, LocaleUtils.getCurrentLocale());
+			ToastCommands.success(
+				result.status === 'already_scheduled'
+					? i18n._(THE_NEW_PRICE_IS_ALREADY_SCHEDULED_DESCRIPTOR, {effectiveDate})
+					: i18n._(YOUR_SUBSCRIPTION_WILL_MOVE_TO_THE_NEW_PRICE_DESCRIPTOR, {effectiveDate}),
+			);
+		} catch (error) {
+			logger.error('Failed to switch subscription to the current list price', error);
+			showPremiumActionErrorModal(
+				error,
+				{
+					fallbackTitle: SWITCH_TO_LIST_PRICE_FAILED_TITLE_DESCRIPTOR,
+					fallbackMessage: SWITCH_TO_LIST_PRICE_FAILED_MESSAGE_DESCRIPTOR,
+				},
+				'app.plutonium.use-subscription-actions.switch-to-list-price.generic-error-modal',
+			);
+		} finally {
+			setLoadingSwitchToListPrice(false);
+		}
+	}, [countryCode, i18n]);
 	const handleCancelPendingSubscriptionChange = useCallback(async () => {
 		setLoadingCancelPendingChange(true);
 		try {
@@ -240,11 +298,13 @@ export const useSubscriptionActions = (countryCode?: string | null) => {
 		loadingEndGrace,
 		loadingChangeBillingCycle,
 		loadingCancelPendingChange,
+		loadingSwitchToListPrice,
 		handleOpenCustomerPortal,
 		handleCancelSubscription,
 		handleEndPremiumGracePeriod,
 		handleReactivateSubscription,
 		handleChangeSubscriptionBillingCycle,
 		handleCancelPendingSubscriptionChange,
+		handleSwitchToListPrice,
 	};
 };

fluxer_app/src/features/app/components/layout/AuthLayout.tsx

@@ -12,6 +12,7 @@ import {AuthCardContainer} from '@app/features/auth/flow/AuthCardContainer';
 import {useAuthBackground} from '@app/features/auth/hooks/useAuthBackground';
 import {type AuthCardVariant, AuthLayoutContext} from '@app/features/auth/state/AuthLayoutContext';
 import {AuthRegisterDraftContext, type AuthRegisterFormDraft} from '@app/features/auth/state/AuthRegisterDraftContext';
+import {AppI18nProvider} from '@app/features/i18n/components/AppI18nProvider';
 import {useLocation} from '@app/features/platform/components/router/RouterReact';
 import {FluxerWordmark} from '@app/features/ui/components/icons/FluxerWordmark';
 import {Scroller, type ScrollerHandle} from '@app/features/ui/components/Scroller';
@@ -21,7 +22,6 @@ import {useNativeTitleBar} from '@app/features/window/hooks/useNativeTitleBar';
 import foodPatternUrl from '@app/media/images/i-like-food.svg';
 import type {GuildSplashCardAlignmentValue} from '@fluxer/constants/src/GuildConstants';
 import {GuildSplashCardAlignment} from '@fluxer/constants/src/GuildConstants';
-import {I18nProvider} from '@lingui/react';
 import clsx from 'clsx';
 import {observer} from 'mobx-react-lite';
 import {type ReactNode, useCallback, useEffect, useMemo, useRef, useState} from 'react';
@@ -258,8 +258,8 @@ export const AuthLayout = observer(function AuthLayout({children}: {children?: R
 		return null;
 	}
 	return (
-		<I18nProvider i18n={i18n}>
+		<AppI18nProvider i18n={i18n}>
 			<AuthLayoutContent data-flx="app.auth-layout.auth-layout-content">{children}</AuthLayoutContent>
-		</I18nProvider>
+		</AppI18nProvider>
 	);
 });

fluxer_app/src/features/app/components/layout/GuildsLayout.tsx

@@ -1275,6 +1275,8 @@ const SKELETON_NAGBAR_ROW_SHAPES: Record<NagbarType, SkeletonNagbarRowShape> = {
 	[NagbarType.PREMIUM_GRACE_PERIOD]: {tone: SkeletonNagbarTone.PREMIUM, hasActions: true},
 	[NagbarType.PREMIUM_EXPIRED]: {tone: SkeletonNagbarTone.DANGER, hasActions: true},
 	[NagbarType.PREMIUM_ONBOARDING]: {tone: SkeletonNagbarTone.BRAND, hasActions: true},
+	[NagbarType.PRICE_ANNOUNCEMENT]: {tone: SkeletonNagbarTone.BRAND, hasActions: true},
+	[NagbarType.LEGACY_PRICE_OPT_IN]: {tone: SkeletonNagbarTone.BRAND, hasActions: true},
 	[NagbarType.GIFT_INVENTORY]: {tone: SkeletonNagbarTone.BRAND, hasActions: true},
 	[NagbarType.DESKTOP_DOWNLOAD]: {tone: SkeletonNagbarTone.BRAND, hasActions: true},
 	[NagbarType.DESKTOP_UPDATE_READY]: {tone: SkeletonNagbarTone.BRAND, hasActions: true},

fluxer_app/src/features/app/components/layout/app_layout/AppLayoutHooks.ts

@@ -18,6 +18,8 @@ import DeveloperOptions from '@app/features/devtools/state/DeveloperOptions';
 import GatewayConnection from '@app/features/gateway/transport/GatewayConnection';
 import * as NotificationUtils from '@app/features/notification/utils/NotificationUtils';
 import NativePermission from '@app/features/permissions/system/state/NativePermission';
+import {resolvePriceAnnouncementCampaign} from '@app/features/premium/config/PriceAnnouncementCampaign';
+import PremiumState from '@app/features/premium/state/PremiumState';
 import StreamerMode from '@app/features/streamer_mode/state/StreamerMode';
 import Nagbar from '@app/features/ui/state/Nagbar';
 import {hasUnavailableElectronNativeContext, isDesktop} from '@app/features/ui/utils/NativeUtils';
@@ -151,6 +153,27 @@ export const useNagbarConditions = (): NagbarConditions => {
 			user?.isPremium() && !user?.hasDismissedPremiumOnboarding && !nagbarState.premiumOnboardingDismissed,
 		);
 	})();
+	const premiumState = PremiumState.loadedForUserId === user?.id ? PremiumState.state : null;
+	const priceAnnouncementCampaign = resolvePriceAnnouncementCampaign(premiumState);
+	const hasPurchaseReadyAccount = Boolean(user?.isClaimed() && (!RuntimeConfig.emailsEnabled || user.verified));
+	const canShowPriceAnnouncement = (() => {
+		if (isSelfHosted) return false;
+		if (!hasPurchaseReadyAccount) return false;
+		if (!premiumState || !priceAnnouncementCampaign) return false;
+		if (premiumState.actual.has_active_paid_premium) return false;
+		return !nagbarState.getPriceAnnouncementDismissed(priceAnnouncementCampaign.campaign.id);
+	})();
+	const canShowLegacyPriceOptIn = (() => {
+		if (isSelfHosted) return false;
+		if (!hasPurchaseReadyAccount) return false;
+		if (!premiumState || !priceAnnouncementCampaign) return false;
+		const listPriceSwitch = premiumState.billing.list_price_switch ?? null;
+		if (!listPriceSwitch?.available || listPriceSwitch.pending) return false;
+		if (listPriceSwitch.currency !== priceAnnouncementCampaign.currency) return false;
+		if (listPriceSwitch.current_amount_minor == null || listPriceSwitch.list_amount_minor == null) return false;
+		if (listPriceSwitch.effective_at == null || listPriceSwitch.billing_cycle == null) return false;
+		return !nagbarState.getLegacyPriceOptInDismissed(priceAnnouncementCampaign.campaign.id);
+	})();
 	const isNativeDesktop = isDesktop();
 	const hasBrokenElectronNativeContext = hasUnavailableElectronNativeContext();
 	const isMobileDevice = /Android|iPhone|iPad|iPod/i.test(navigator.userAgent);
@@ -281,6 +304,8 @@ export const useNagbarConditions = (): NagbarConditions => {
 		canShowPremiumGracePeriod,
 		canShowPremiumExpired,
 		canShowPremiumOnboarding,
+		canShowPriceAnnouncement,
+		canShowLegacyPriceOptIn,
 		canShowGiftInventory,
 		canShowDesktopDownload,
 		canShowGuildMembershipCta,
@@ -356,6 +381,12 @@ export const useActiveNagbars = (conditions: NagbarConditions): Array<NagbarStat
 				visible: conditions.canShowVoiceSessionRestore,
 				dismissible: true,
 			},
+			{
+				type: NagbarType.LEGACY_PRICE_OPT_IN,
+				priority: 2,
+				visible: conditions.canShowLegacyPriceOptIn,
+				dismissible: true,
+			},
 			{
 				type: NagbarType.PREMIUM_ONBOARDING,
 				priority: 4,
@@ -368,6 +399,12 @@ export const useActiveNagbars = (conditions: NagbarConditions): Array<NagbarStat
 				visible: conditions.canShowGiftInventory,
 				dismissible: true,
 			},
+			{
+				type: NagbarType.PRICE_ANNOUNCEMENT,
+				priority: 5.5,
+				visible: conditions.canShowPriceAnnouncement,
+				dismissible: true,
+			},
 			{
 				type: NagbarType.GUILD_MEMBERSHIP_CTA,
 				priority: 6,

fluxer_app/src/features/app/components/layout/app_layout/AppLayoutTypes.ts

@@ -13,6 +13,8 @@ export const NagbarType = {
 	PREMIUM_GRACE_PERIOD: 'premium-grace-period',
 	PREMIUM_EXPIRED: 'premium-expired',
 	PREMIUM_ONBOARDING: 'premium-onboarding',
+	PRICE_ANNOUNCEMENT: 'price-announcement',
+	LEGACY_PRICE_OPT_IN: 'legacy-price-opt-in',
 	GIFT_INVENTORY: 'gift-inventory',
 	DESKTOP_DOWNLOAD: 'desktop-download',
 	DESKTOP_UPDATE_READY: 'desktop-update-ready',
@@ -49,6 +51,8 @@ export interface NagbarConditions {
 	canShowPremiumGracePeriod: boolean;
 	canShowPremiumExpired: boolean;
 	canShowPremiumOnboarding: boolean;
+	canShowPriceAnnouncement: boolean;
+	canShowLegacyPriceOptIn: boolean;
 	canShowGiftInventory: boolean;
 	canShowDesktopDownload: boolean;
 	canShowDesktopUpdateReady: boolean;

fluxer_app/src/features/app/components/layout/app_layout/NagbarContainer.tsx

@@ -11,10 +11,12 @@ import {DesktopUpdateReadyNagbar} from '@app/features/app/components/layout/app_
 import {EmailVerificationNagbar} from '@app/features/app/components/layout/app_layout/nagbars/EmailVerificationNagbar';
 import {GiftInventoryNagbar} from '@app/features/app/components/layout/app_layout/nagbars/GiftInventoryNagbar';
 import {GuildMembershipCtaNagbar} from '@app/features/app/components/layout/app_layout/nagbars/GuildMembershipCtaNagbar';
+import {LegacyPriceOptInNagbar} from '@app/features/app/components/layout/app_layout/nagbars/LegacyPriceOptInNagbar';
 import {LinuxInputAccessNagbar} from '@app/features/app/components/layout/app_layout/nagbars/LinuxInputAccessNagbar';
 import {PremiumExpiredNagbar} from '@app/features/app/components/layout/app_layout/nagbars/PremiumExpiredNagbar';
 import {PremiumGracePeriodNagbar} from '@app/features/app/components/layout/app_layout/nagbars/PremiumGracePeriodNagbar';
 import {PremiumOnboardingNagbar} from '@app/features/app/components/layout/app_layout/nagbars/PremiumOnboardingNagbar';
+import {PriceAnnouncementNagbar} from '@app/features/app/components/layout/app_layout/nagbars/PriceAnnouncementNagbar';
 import {ScheduledMaintenanceNagbar} from '@app/features/app/components/layout/app_layout/nagbars/ScheduledMaintenanceNagbar';
 import {StreamerModeNagbar} from '@app/features/app/components/layout/app_layout/nagbars/StreamerModeNagbar';
 import {TermsAcceptanceNagbar} from '@app/features/app/components/layout/app_layout/nagbars/TermsAcceptanceNagbar';
@@ -137,6 +139,24 @@ export const NagbarContainer: React.FC<NagbarContainerProps> = observer(({nagbar
 								data-flx="app.app-layout.nagbar-container.premium-onboarding-nagbar"
 							/>
 						);
+					case NagbarType.PRICE_ANNOUNCEMENT:
+						if (!showPremiumFeatures) return null;
+						return (
+							<PriceAnnouncementNagbar
+								key={nagbar.type}
+								isMobile={mobileLayout.enabled}
+								data-flx="app.app-layout.nagbar-container.price-announcement-nagbar"
+							/>
+						);
+					case NagbarType.LEGACY_PRICE_OPT_IN:
+						if (!showPremiumFeatures) return null;
+						return (
+							<LegacyPriceOptInNagbar
+								key={nagbar.type}
+								isMobile={mobileLayout.enabled}
+								data-flx="app.app-layout.nagbar-container.legacy-price-opt-in-nagbar"
+							/>
+						);
 					case NagbarType.GIFT_INVENTORY:
 						if (!showPremiumFeatures) return null;
 						return (

fluxer_app/src/features/app/components/layout/app_layout/nagbars/LegacyPriceOptInNagbar.tsx

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {Nagbar} from '@app/features/app/components/layout/Nagbar';
+import {NagbarButton} from '@app/features/app/components/layout/NagbarButton';
+import {NagbarContent} from '@app/features/app/components/layout/NagbarContent';
+import {NAGBAR_TONES, NagbarToneKind} from '@app/features/app/components/layout/NagbarTones';
+import {PREMIUM_PRODUCT_NAME} from '@app/features/app/config/I18nDisplayConstants';
+import {resolvePriceAnnouncementCampaign} from '@app/features/premium/config/PriceAnnouncementCampaign';
+import PremiumState from '@app/features/premium/state/PremiumState';
+import {MANAGE_SUBSCRIPTION_DESCRIPTOR} from '@app/features/premium/utils/PremiumMessageDescriptors';
+import {formatMinorUnitPrice} from '@app/features/premium/utils/PricingUtils';
+import * as ModalCommands from '@app/features/ui/commands/ModalCommands';
+import {modal} from '@app/features/ui/commands/ModalCommands';
+import NagbarState from '@app/features/ui/state/Nagbar';
+import {UserSettingsModal} from '@app/features/user/components/modals/UserSettingsModal';
+import Users from '@app/features/user/state/Users';
+import * as LocaleUtils from '@app/features/user/utils/LocaleUtils';
+import {getFormattedLongDate} from '@fluxer/date_utils/src/DateFormatting';
+import {useLingui} from '@lingui/react/macro';
+import {observer} from 'mobx-react-lite';
+import {useCallback} from 'react';
+
+export const LegacyPriceOptInNagbar = observer(function LegacyPriceOptInNagbar({isMobile}: {isMobile: boolean}) {
+	const {i18n} = useLingui();
+	const currentUser = Users.currentUser;
+	const premiumState = PremiumState.loadedForUserId === currentUser?.id ? PremiumState.state : null;
+	const resolved = resolvePriceAnnouncementCampaign(premiumState);
+	const campaignId = resolved?.campaign.id ?? null;
+	const handleOpenPremiumSettings = useCallback(() => {
+		ModalCommands.push(
+			modal(() => (
+				<UserSettingsModal
+					initialTab="plutonium"
+					data-flx="app.app-layout.nagbars.legacy-price-opt-in-nagbar.handle-open-premium-settings.user-settings-modal"
+				/>
+			)),
+		);
+	}, []);
+	const handleDismiss = useCallback(() => {
+		if (campaignId == null) return;
+		NagbarState.dismissLegacyPriceOptIn(campaignId);
+	}, [campaignId]);
+	if (!premiumState || !resolved) return null;
+	const listPriceSwitch = premiumState.billing.list_price_switch ?? null;
+	if (!listPriceSwitch?.available || listPriceSwitch.pending) return null;
+	if (listPriceSwitch.currency !== resolved.currency || listPriceSwitch.effective_at == null) return null;
+	if (listPriceSwitch.billing_cycle == null) return null;
+	const locale = LocaleUtils.getCurrentLocale();
+	const currentPrice = formatMinorUnitPrice(listPriceSwitch.current_amount_minor, listPriceSwitch.currency, locale);
+	const newPrice = formatMinorUnitPrice(listPriceSwitch.list_amount_minor, listPriceSwitch.currency, locale);
+	if (currentPrice == null || newPrice == null) return null;
+	return (
+		<Nagbar
+			isMobile={isMobile}
+			backgroundColor={NAGBAR_TONES[NagbarToneKind.BRAND].backgroundColor}
+			textColor={NAGBAR_TONES[NagbarToneKind.BRAND].textColor}
+			dismissible
+			onDismiss={handleDismiss}
+			data-flx="app.app-layout.nagbars.legacy-price-opt-in-nagbar.nagbar"
+		>
+			<NagbarContent
+				isMobile={isMobile}
+				onDismiss={handleDismiss}
+				message={i18n._(
+					listPriceSwitch.billing_cycle === 'monthly'
+						? resolved.campaign.optInMonthlyMessage
+						: resolved.campaign.optInYearlyMessage,
+					{
+						premiumProductName: PREMIUM_PRODUCT_NAME,
+						currentPrice,
+						newPrice,
+						effectiveDate: getFormattedLongDate(listPriceSwitch.effective_at, locale),
+					},
+				)}
+				actions={
+					<NagbarButton
+						isMobile={isMobile}
+						onClick={handleOpenPremiumSettings}
+						data-flx="app.app-layout.nagbars.legacy-price-opt-in-nagbar.nagbar-button.open-premium-settings"
+					>
+						{i18n._(MANAGE_SUBSCRIPTION_DESCRIPTOR)}
+					</NagbarButton>
+				}
+				data-flx="app.app-layout.nagbars.legacy-price-opt-in-nagbar.nagbar-content"
+			/>
+		</Nagbar>
+	);
+});

fluxer_app/src/features/app/components/layout/app_layout/nagbars/PriceAnnouncementNagbar.tsx

@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {Nagbar} from '@app/features/app/components/layout/Nagbar';
+import {NagbarButton} from '@app/features/app/components/layout/NagbarButton';
+import {NagbarContent} from '@app/features/app/components/layout/NagbarContent';
+import {NAGBAR_TONES, NagbarToneKind} from '@app/features/app/components/layout/NagbarTones';
+import {PREMIUM_PRODUCT_NAME} from '@app/features/app/config/I18nDisplayConstants';
+import {resolvePriceAnnouncementCampaign} from '@app/features/premium/config/PriceAnnouncementCampaign';
+import PremiumState from '@app/features/premium/state/PremiumState';
+import {VIEW_PLANS_DESCRIPTOR} from '@app/features/premium/utils/PremiumMessageDescriptors';
+import {formatMinorUnitPrice} from '@app/features/premium/utils/PricingUtils';
+import * as ModalCommands from '@app/features/ui/commands/ModalCommands';
+import {modal} from '@app/features/ui/commands/ModalCommands';
+import NagbarState from '@app/features/ui/state/Nagbar';
+import {UserSettingsModal} from '@app/features/user/components/modals/UserSettingsModal';
+import Users from '@app/features/user/state/Users';
+import * as LocaleUtils from '@app/features/user/utils/LocaleUtils';
+import {useLingui} from '@lingui/react/macro';
+import {observer} from 'mobx-react-lite';
+import {useCallback} from 'react';
+
+export const PriceAnnouncementNagbar = observer(function PriceAnnouncementNagbar({isMobile}: {isMobile: boolean}) {
+	const {i18n} = useLingui();
+	const currentUser = Users.currentUser;
+	const premiumState = PremiumState.loadedForUserId === currentUser?.id ? PremiumState.state : null;
+	const resolved = resolvePriceAnnouncementCampaign(premiumState);
+	const campaignId = resolved?.campaign.id ?? null;
+	const handleOpenPlans = useCallback(() => {
+		if (campaignId != null) {
+			NagbarState.dismissPriceAnnouncement(campaignId);
+		}
+		ModalCommands.push(
+			modal(() => (
+				<UserSettingsModal
+					initialTab="plutonium"
+					data-flx="app.app-layout.nagbars.price-announcement-nagbar.handle-open-plans.user-settings-modal"
+				/>
+			)),
+		);
+	}, [campaignId]);
+	const handleDismiss = useCallback(() => {
+		if (campaignId == null) return;
+		NagbarState.dismissPriceAnnouncement(campaignId);
+	}, [campaignId]);
+	if (!premiumState || !resolved || premiumState.actual.has_active_paid_premium) return null;
+	const locale = LocaleUtils.getCurrentLocale();
+	const monthlyPrice = formatMinorUnitPrice(resolved.monthlyAmountMinor, resolved.currency, locale);
+	const yearlyPrice = formatMinorUnitPrice(resolved.yearlyAmountMinor, resolved.currency, locale);
+	if (monthlyPrice == null || yearlyPrice == null) return null;
+	return (
+		<Nagbar
+			isMobile={isMobile}
+			backgroundColor={NAGBAR_TONES[NagbarToneKind.BRAND].backgroundColor}
+			textColor={NAGBAR_TONES[NagbarToneKind.BRAND].textColor}
+			dismissible
+			onDismiss={handleDismiss}
+			data-flx="app.app-layout.nagbars.price-announcement-nagbar.nagbar"
+		>
+			<NagbarContent
+				isMobile={isMobile}
+				onDismiss={handleDismiss}
+				message={i18n._(resolved.campaign.announcementMessage, {
+					premiumProductName: PREMIUM_PRODUCT_NAME,
+					monthlyPrice,
+					yearlyPrice,
+				})}
+				actions={
+					<NagbarButton
+						isMobile={isMobile}
+						onClick={handleOpenPlans}
+						data-flx="app.app-layout.nagbars.price-announcement-nagbar.nagbar-button.open-plans"
+					>
+						{i18n._(VIEW_PLANS_DESCRIPTOR)}
+					</NagbarButton>
+				}
+				data-flx="app.app-layout.nagbars.price-announcement-nagbar.nagbar-content"
+			/>
+		</Nagbar>
+	);
+});

fluxer_app/src/features/app/components/setup/SelfHostedSetupWizardGate.tsx

@@ -3,6 +3,7 @@
 import * as Modal from '@app/features/app/components/dialogs/Modal';
 import styles from '@app/features/app/components/setup/SelfHostedSetupWizardGate.module.css';
 import {
+	classifySetupUnauthorized,
 	fetchInstanceConfig,
 	type SetupBrandingAssetKind,
 	testSmtpConfig,
@@ -55,6 +56,7 @@ import {fileToBase64} from '@app/features/user/utils/AvatarUtils';
 import * as FormUtils from '@app/lib/forms';
 import {type ThemeType, ThemeTypes} from '@fluxer/constants/src/UserConstants';
 import type {InstanceConfigResponse} from '@fluxer/schema/src/domains/admin/AdminSchemas';
+import type {MessageDescriptor} from '@lingui/core';
 import {msg} from '@lingui/core/macro';
 import {useLingui} from '@lingui/react/macro';
 import {ArrowLeftIcon, ArrowRightIcon, CheckIcon, WrenchIcon} from '@phosphor-icons/react';
@@ -92,6 +94,11 @@ const LOAD_ERROR_DESCRIPTOR = msg({
 	message: 'Could not load the instance configuration. Try reloading the page.',
 	comment: 'Error shown when the setup wizard fails to load the instance configuration.',
 });
+const ORIGIN_MISMATCH_DESCRIPTOR = msg({
+	message:
+		'The API is on a different origin than this page, so setup requests are sent without your session. Check the public origin and port this instance is configured with, then reload.',
+	comment: 'Error shown when the setup wizard cannot load because the API origin differs from the page origin.',
+});
 const ASSET_UPLOAD_ERROR_DESCRIPTOR = msg({
 	message: 'That image could not be used. Try a different file.',
 	comment: 'Error shown when a branding image fails to upload in the setup wizard.',
@@ -425,7 +432,7 @@ export const SelfHostedSetupWizardGate = observer(() => {
 	const stepNavigationUnlockTimerRef = useRef<number | null>(null);
 
 	const [config, setConfig] = useState<InstanceConfigResponse | null>(null);
-	const [loadError, setLoadError] = useState(false);
+	const [loadError, setLoadError] = useState<MessageDescriptor | null>(null);
 	const [submitting, setSubmitting] = useState(false);
 	const [submitError, setSubmitError] = useState<string | null>(null);
 	const [stepNavigationLocked, setStepNavigationLocked] = useState(false);
@@ -531,11 +538,11 @@ export const SelfHostedSetupWizardGate = observer(() => {
 	}, [authStoreAuthenticated, forceUnauthenticatedSetup]);
 
 	const resetStaleSetupSession = useCallback(async () => {
-		logger.warn('Instance config fetch returned 401 during setup; clearing stale local setup session');
+		logger.warn('The setup session token was rejected. Clearing the stale local setup session.');
 		setForceUnauthenticatedSetup(true);
 		registerFormDraftsRef.current.clear();
 		setConfig(null);
-		setLoadError(false);
+		setLoadError(null);
 		setSubmitError(null);
 		setSubmitting(false);
 		setWizardSnapshot(createSetupWizardSnapshot());
@@ -605,7 +612,7 @@ export const SelfHostedSetupWizardGate = observer(() => {
 	useEffect(() => {
 		if (!isAuthenticated || config) return;
 		let cancelled = false;
-		setLoadError(false);
+		setLoadError(null);
 		void (async () => {
 			try {
 				const next = await fetchInstanceConfig();
@@ -613,12 +620,15 @@ export const SelfHostedSetupWizardGate = observer(() => {
 				hydrateFromConfig(next);
 			} catch (error) {
 				if (cancelled) return;
-				if (error instanceof HttpError && error.status === 401) {
+				const cause =
+					error instanceof HttpError && error.status === 401 ? await classifySetupUnauthorized() : 'unknown';
+				if (cancelled) return;
+				if (cause === 'stale_session') {
 					await resetStaleSetupSession();
 					return;
 				}
 				logger.error('Failed to load instance configuration', error);
-				setLoadError(true);
+				setLoadError(cause === 'origin_mismatch' ? ORIGIN_MISMATCH_DESCRIPTOR : LOAD_ERROR_DESCRIPTOR);
 			}
 		})();
 		return () => {
@@ -868,7 +878,7 @@ export const SelfHostedSetupWizardGate = observer(() => {
 										role="alert"
 										data-flx="app.self-hosted-setup-wizard-gate.load-error"
 									>
-										{i18n._(LOAD_ERROR_DESCRIPTOR)}
+										{i18n._(loadError)}
 									</p>
 								</div>
 							) : (

fluxer_app/src/features/app/components/setup/SetupWizardClient.ts

@@ -1,7 +1,9 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
 import {Endpoints} from '@app/features/app/constants/Endpoints';
+import SessionManager from '@app/features/platform/state/AuthSession';
 import {http} from '@app/features/platform/transport/RestTransport';
+import {Logger} from '@app/features/platform/utils/AppLogger';
 import type {
 	BrandingAssetUploadRequest,
 	InstanceConfigResponse,
@@ -10,6 +12,8 @@ import type {
 	InstanceEmailSmtpTestResponse,
 } from '@fluxer/schema/src/domains/admin/AdminSchemas';
 
+const logger = new Logger('SetupWizardClient');
+
 export type SetupBrandingAssetKind = BrandingAssetUploadRequest['kind'];
 
 export async function fetchInstanceConfig(): Promise<InstanceConfigResponse> {
@@ -35,3 +39,17 @@ export async function testSmtpConfig(body: InstanceEmailSmtpTestRequest): Promis
 	const response = await http.post<InstanceEmailSmtpTestResponse>(Endpoints.ADMIN_INSTANCE_CONFIG_SMTP_TESTS, {body});
 	return response.body;
 }
+
+export type SetupUnauthorizedCause = 'stale_session' | 'origin_mismatch' | 'unknown';
+
+export async function classifySetupUnauthorized(): Promise<SetupUnauthorizedCause> {
+	if (!SessionManager.token) return 'unknown';
+	if (!http.carriesAuthorization()) return 'origin_mismatch';
+	try {
+		const response = await http.get(Endpoints.USER_ME, {mode: 'silent'});
+		return response.status === 401 ? 'stale_session' : 'unknown';
+	} catch (error) {
+		logger.warn('Could not confirm whether the setup session is still valid', error);
+		return 'unknown';
+	}
+}

fluxer_app/src/features/app/constants/Endpoints.ts

@@ -122,6 +122,7 @@ export const Endpoints = {
 	PREMIUM_REACTIVATE_SUBSCRIPTION: '/premium/reactivate-subscription',
 	PREMIUM_CHANGE_SUBSCRIPTION: '/premium/change-subscription',
 	PREMIUM_CANCEL_PENDING_SUBSCRIPTION_CHANGE: '/premium/cancel-pending-subscription-change',
+	PREMIUM_SWITCH_TO_LIST_PRICE: '/premium/switch-to-list-price',
 	PREMIUM_GRACE_END: '/premium/grace/end',
 	PREMIUM_REFUND_ELIGIBILITY: '/premium/refund-eligibility',
 	PREMIUM_REFUND_LATEST: '/premium/refund-latest',

fluxer_app/src/features/auth/components/modals/TermsAcceptanceModal.tsx

@@ -165,9 +165,11 @@ export const TermsAcceptanceModal = observer(() => {
 					ref={primaryRef}
 					data-flx="auth.terms-acceptance-modal.button.accept"
 				>
-					{kind === 'terms' && i18n._(I_AGREE_TO_THE_UPDATED_TERMS_DESCRIPTOR)}
-					{kind === 'privacy' && i18n._(I_AGREE_TO_THE_UPDATED_PRIVACY_POLICY_DESCRIPTOR)}
-					{kind === 'both' && i18n._(I_AGREE_TO_THE_UPDATED_POLICIES_DESCRIPTOR)}
+					{kind === 'terms'
+						? i18n._(I_AGREE_TO_THE_UPDATED_TERMS_DESCRIPTOR)
+						: kind === 'privacy'
+							? i18n._(I_AGREE_TO_THE_UPDATED_PRIVACY_POLICY_DESCRIPTOR)
+							: i18n._(I_AGREE_TO_THE_UPDATED_POLICIES_DESCRIPTOR)}
 				</Button>
 			</Modal.Footer>
 		</Modal.Root>

fluxer_app/src/features/auth/components/modals/required_action/RequiredActionShared.tsx

@@ -83,6 +83,7 @@ const EMAIL_VALIDATION_CODES = new Set<string>([
 	ValidationErrorCodes.INVALID_EMAIL_FORMAT,
 	ValidationErrorCodes.INVALID_EMAIL_LOCAL_PART,
 	ValidationErrorCodes.INVALID_EMAIL_ADDRESS,
+	ValidationErrorCodes.EMAIL_DOMAIN_CANNOT_RECEIVE_MAIL,
 ]);
 const CODE_SESSION_VALIDATION_CODES = new Set<string>([
 	ValidationErrorCodes.EMAIL_TOKEN_EXPIRED,

fluxer_app/src/features/auth/flow/AuthBottomLink.tsx

@@ -20,7 +20,7 @@ export function AuthBottomLink({variant, to}: AuthBottomLinkProps) {
 	return (
 		<div className={styles.bottomLink} data-flx="auth.flow.auth-bottom-link.bottom-link">
 			<span className={styles.bottomLinkText} data-flx="auth.flow.auth-bottom-link.bottom-link-text">
-				{variant === 'login' ? i18n._(ALREADY_HAVE_ACCOUNT_DESCRIPTOR) : i18n._(NEED_ACCOUNT_DESCRIPTOR)}{' '}
+				{`${variant === 'login' ? i18n._(ALREADY_HAVE_ACCOUNT_DESCRIPTOR) : i18n._(NEED_ACCOUNT_DESCRIPTOR)} `}
 			</span>
 			<AuthRouterLink
 				to={to}

fluxer_app/src/features/auth/flow/IpAuthorizationScreen.tsx

@@ -142,7 +142,9 @@ const IpAuthorizationScreen = ({challenge, onAuthorized, onBack}: IpAuthorizatio
 						data-flx="auth.flow.ip-authorization-screen.button.resend"
 					>
 						{resendUsed ? <Trans>Resent</Trans> : <Trans>Resend email</Trans>}
-						{resendIn > 0 ? ` (${resendIn}s)` : ''}
+						<flx-i18n data-flx="auth.flow.ip-authorization-screen.flx-i18n">
+							{resendIn > 0 ? ` (${resendIn}s)` : ''}
+						</flx-i18n>
 					</Button>
 				)}
 				{onBack ? (

fluxer_app/src/features/channel/components/ChannelReplyBar.tsx

@@ -182,7 +182,9 @@ export const ReplyBar = observer(function ReplyBar({
 									data-flx="channel.reply-bar.switch.toggle-mention"
 								>
 									<AtIcon weight="bold" className={styles.mentionIcon} data-flx="channel.reply-bar.mention-icon" />
-									{shouldMention ? i18n._(ON_DESCRIPTOR) : i18n._(OFF_DESCRIPTOR)}
+									<flx-i18n data-flx="channel.channel-reply-bar.reply-bar.flx-i18n">
+										{shouldMention ? i18n._(ON_DESCRIPTOR) : i18n._(OFF_DESCRIPTOR)}
+									</flx-i18n>
 								</button>
 							</FocusRing>
 						</Tooltip>

fluxer_app/src/features/channel/components/ReplyPreview.tsx

@@ -223,8 +223,7 @@ export const ReplyPreview = observer(
 						data-guild-id={resolvedGuildId}
 						data-flx="channel.reply-preview.replied-username"
 					>
-						{message.mentions.some((mention) => mention.id === referencedMessage.author.id) && '@'}
-						{NicknameUtils.getNickname(referencedMessage.author, resolvedGuildId)}
+						{`${message.mentions.some((mention) => mention.id === referencedMessage.author.id) ? '@' : ''}${NicknameUtils.getNickname(referencedMessage.author, resolvedGuildId)}`}
 					</span>
 				</PreloadableUserPopout>
 				<FocusRing offset={-2} data-flx="channel.reply-preview.focus-ring">

fluxer_app/src/features/channel/components/channel_header_components/developer_tools/ResetOptions.ts

@@ -68,6 +68,7 @@ export const DEFAULT_DEVELOPER_OPTIONS = {
 	mockTitlebarPlatformOverride: 'auto',
 	mockAttachmentStates: {},
 	noOpInAppReports: false,
+	disableTranslationDomGuard: false,
 } satisfies DeveloperOptionsState;
 const PREMIUM_SCENARIO_OVERRIDE_KEYS = new Set<keyof DeveloperOptionsState>([
 	'premiumTypeOverride',

fluxer_app/src/features/channel/components/embeds/attachments/CsvAttachmentTablePanel.tsx

@@ -81,10 +81,11 @@ export function CsvAttachmentTablePanel({
 						data-flx="channel.embeds.attachments.csv-attachment-table-panel.warning-circle-icon"
 					/>
 					<span data-flx="channel.embeds.attachments.csv-attachment-table-panel.span">
-						{previewError?.type === 'size'
-							? i18n._(FILE_IS_TOO_LARGE_FOR_INLINE_PREVIEW_LIMIT_DESCRIPTOR, {previewLimitKb: PREVIEW_LIMIT_KB})
-							: i18n._(UNABLE_TO_LOAD_PREVIEW_DESCRIPTOR)}
-						{previewError?.type === 'network' && previewError.message ? ` ${previewError.message}` : ''}
+						{`${
+							previewError?.type === 'size'
+								? i18n._(FILE_IS_TOO_LARGE_FOR_INLINE_PREVIEW_LIMIT_DESCRIPTOR, {previewLimitKb: PREVIEW_LIMIT_KB})
+								: i18n._(UNABLE_TO_LOAD_PREVIEW_DESCRIPTOR)
+						}${previewError?.type === 'network' && previewError.message ? ` ${previewError.message}` : ''}`}
 					</span>
 				</div>
 			</div>

fluxer_app/src/features/channel/components/embeds/attachments/TextualAttachmentCodePanel.tsx

@@ -64,10 +64,11 @@ export function TextualAttachmentCodePanel({
 						data-flx="channel.embeds.attachments.textual-attachment-code-panel.warning-circle-icon"
 					/>
 					<span data-flx="channel.embeds.attachments.textual-attachment-code-panel.span">
-						{previewError?.type === 'size'
-							? i18n._(FILE_IS_TOO_LARGE_FOR_INLINE_PREVIEW_LIMIT_DESCRIPTOR, {previewLimitKb: PREVIEW_LIMIT_KB})
-							: i18n._(UNABLE_TO_LOAD_PREVIEW_DESCRIPTOR)}
-						{previewError?.type === 'network' && previewError.message ? ` ${previewError.message}` : ''}
+						{`${
+							previewError?.type === 'size'
+								? i18n._(FILE_IS_TOO_LARGE_FOR_INLINE_PREVIEW_LIMIT_DESCRIPTOR, {previewLimitKb: PREVIEW_LIMIT_KB})
+								: i18n._(UNABLE_TO_LOAD_PREVIEW_DESCRIPTOR)
+						}${previewError?.type === 'network' && previewError.message ? ` ${previewError.message}` : ''}`}
 					</span>
 				</div>
 			</div>

fluxer_app/src/features/channel/components/message_search_bar/FilterOption.tsx

@@ -116,7 +116,9 @@ export const FiltersSection: React.FC<FiltersSectionProps> = observer(
 							size={remFromPx(12)}
 							data-flx="channel.message-search-bar.filter-option.filters-section.funnel-icon"
 						/>
-						{title || i18n._(SEARCH_FILTERS_DESCRIPTOR)}
+						<flx-i18n data-flx="channel.message-search-bar.filter-option.filters-section.flx-i18n">
+							{title || i18n._(SEARCH_FILTERS_DESCRIPTOR)}
+						</flx-i18n>
 					</span>
 				</div>
 				{options.map((option: SearchFilterOption, index) => (

fluxer_app/src/features/channel/components/message_search_bar/PlaintextSection.tsx

@@ -91,7 +91,9 @@ export const PlaintextSection: React.FC<PlaintextSectionProps> = observer(
 										data-flx="channel.message-search-bar.plaintext-section.magnifying-glass-icon"
 									/>
 								)}
-								{group === 'filter-key' ? i18n._(SEARCH_FILTERS_DESCRIPTOR) : `${group}:`}
+								<flx-i18n data-flx="channel.message-search-bar.plaintext-section.flx-i18n">
+									{group === 'filter-key' ? i18n._(SEARCH_FILTERS_DESCRIPTOR) : `${group}:`}
+								</flx-i18n>
 							</span>
 						</div>
 						{entries.map(({row, index}) => {

fluxer_app/src/features/channel/components/modals/UnaddableRecipientsConfirmModal.tsx

@@ -84,7 +84,8 @@ export const UnaddableRecipientsConfirmModal = observer(
 				<ul data-flx="channel.unaddable-recipients-confirm-modal.ul">
 					{rows.map((row) => (
 						<li key={row.userId} data-flx="channel.unaddable-recipients-confirm-modal.li">
-							<strong data-flx="channel.unaddable-recipients-confirm-modal.strong">{row.name}</strong>: {row.reasonText}
+							<strong data-flx="channel.unaddable-recipients-confirm-modal.strong">{row.name}</strong>
+							<span data-flx="channel.unaddable-recipients-confirm-modal.span">{`: ${row.reasonText}`}</span>
 						</li>
 					))}
 				</ul>

fluxer_app/src/features/devtools/components/DeveloperOptionsToggleGroups.ts

@@ -34,6 +34,16 @@ const ALWAYS_DISPLAY_THE_VOICE_CONNECTION_STATUS_BAR_IN_DESCRIPTOR = msg({
 	comment:
 		'Developer / debug surface — keep terse and technical. Tooltip / description for forcing the voice connection status bar visible in mocked mode.',
 });
+const DISABLE_TRANSLATION_DOM_GUARD_DESCRIPTOR = msg({
+	message: 'Disable translation DOM guard',
+	comment: 'Developer option label for turning off the page-translator DOM crash guard.',
+});
+const STOP_PATCHING_NODE_PROTOTYPE_INSERTBEFORE_AND_DESCRIPTOR = msg({
+	message:
+		'Stop patching Node.prototype insertBefore and removeChild. The app will crash again when a page translator re-parents text nodes React still holds.',
+	comment:
+		'Developer / debug surface — keep terse and technical. Tooltip / description for the translation DOM guard kill switch.',
+});
 const APP_STATE_DESCRIPTOR = msg({
 	message: 'App state',
 	comment: 'Developer options group for overriding app/account state.',
@@ -255,6 +265,11 @@ export const getToggleGroups = (): Array<ToggleGroup> => [
 				label: NO_OP_IN_APP_REPORTS_DESCRIPTOR,
 				description: NO_OP_IN_APP_REPORTS_DESC_DESCRIPTOR,
 			},
+			{
+				key: 'disableTranslationDomGuard',
+				label: DISABLE_TRANSLATION_DOM_GUARD_DESCRIPTOR,
+				description: STOP_PATCHING_NODE_PROTOTYPE_INSERTBEFORE_AND_DESCRIPTOR,
+			},
 		],
 	},
 ];

fluxer_app/src/features/devtools/state/DeveloperOptions.ts

@@ -96,6 +96,7 @@ export type DeveloperOptionsState = Readonly<{
 		}
 	>;
 	noOpInAppReports: boolean;
+	disableTranslationDomGuard: boolean;
 }>;
 type MutableDeveloperOptionsState = {
 	-readonly [K in keyof DeveloperOptionsState]: DeveloperOptionsState[K];
@@ -179,6 +180,7 @@ class DeveloperOptions implements DeveloperOptionsState {
 	mockGiftRedeemed: boolean | null = null;
 	mockTitlebarPlatformOverride: DeveloperOptionsState['mockTitlebarPlatformOverride'] = 'auto';
 	noOpInAppReports = false;
+	disableTranslationDomGuard = false;
 
 	constructor() {
 		makeAutoObservable(this, {}, {autoBind: true});
@@ -250,6 +252,7 @@ class DeveloperOptions implements DeveloperOptionsState {
 			'mockTitlebarPlatformOverride',
 			'mockAttachmentStates',
 			'noOpInAppReports',
+			'disableTranslationDomGuard',
 		]);
 	}
 

fluxer_app/src/features/i18n/components/AppI18nProvider.test.tsx

@@ -0,0 +1,198 @@
+// @vitest-environment happy-dom
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {AppI18nProvider} from '@app/features/i18n/components/AppI18nProvider';
+import {commitUnderTranslation, isTranslationDomCrash} from '@app/features/i18n/testing/TranslationCommitHarness';
+import {
+	findTranslationUnsafeTextNodes,
+	TRANSLATION_MARKER,
+	TRANSLATOR_PIPELINE_NAMES,
+	TranslatorPipelines,
+} from '@app/features/i18n/testing/TranslatorSimulation';
+import {i18n} from '@lingui/core';
+import {I18nProvider, Trans} from '@lingui/react';
+import {createElement, type ReactNode} from 'react';
+import {afterEach, beforeAll, describe, expect, it} from 'vitest';
+
+const ENGLISH = {
+	simple: 'Monthly {price}',
+	rich: 'Renews on <0>{date}</0>. Enjoy!',
+	nested: 'Renews on <0>{date} at <1>noon</1></0>. Enjoy!',
+};
+const GERMAN = {
+	simple: 'Monatlich {price}',
+	rich: '<0>{date}</0> ist das Datum. Viel Spass!',
+	nested: 'Ende <0><1>mittags</1> am {date}</0>. Viel Spass!',
+};
+
+const visibleText = (html: string): string => html.replace(/<[^>]+>/g, '').replaceAll(TRANSLATION_MARKER, '');
+
+const message = (id: keyof typeof ENGLISH): ReactNode =>
+	createElement(Trans, {
+		id,
+		values: {date: 'Jan 1', price: '$5'},
+		components: {0: createElement('strong'), 1: createElement('em')},
+	});
+
+const provided = (child: ReactNode, safe: boolean): ReactNode =>
+	createElement(safe ? AppI18nProvider : I18nProvider, {i18n}, createElement('div', null, child));
+
+const withBadge = (id: keyof typeof ENGLISH, on: boolean, safe: boolean): ReactNode =>
+	provided(
+		createElement('div', null, on ? createElement('b', null, '!') : null, message(id), createElement('i', null, 'x')),
+		safe,
+	);
+
+beforeAll(() => {
+	i18n.load('en', ENGLISH);
+	i18n.load('de', GERMAN);
+	i18n.activate('en');
+});
+
+afterEach(() => {
+	i18n.activate('en');
+	document.body.replaceChildren();
+});
+
+describe('lingui <Trans> without a translation-safe defaultComponent', () => {
+	for (const pipelineName of TRANSLATOR_PIPELINE_NAMES) {
+		it(`throws the production DOM error on a simple message under ${pipelineName}`, () => {
+			const result = commitUnderTranslation({
+				before: withBadge('simple', false, false),
+				after: withBadge('simple', true, false),
+				pipeline: TranslatorPipelines[pipelineName],
+			});
+			expect(result.unsafeTextNodesBeforeTranslation).toBeGreaterThan(0);
+			expect(result.htmlBeforeTranslation).toContain('Monthly $5<i>x</i>');
+			expect(isTranslationDomCrash(result.error)).toBe(true);
+		});
+
+		it(`throws the production DOM error on a rich message under ${pipelineName}`, () => {
+			const result = commitUnderTranslation({
+				before: withBadge('rich', false, false),
+				after: withBadge('rich', true, false),
+				pipeline: TranslatorPipelines[pipelineName],
+			});
+			expect(result.unsafeTextNodesBeforeTranslation).toBeGreaterThan(0);
+			expect(isTranslationDomCrash(result.error)).toBe(true);
+		});
+	}
+});
+
+describe('lingui <Trans> under AppI18nProvider', () => {
+	for (const pipelineName of TRANSLATOR_PIPELINE_NAMES) {
+		if (pipelineName === 'chromeCompound') {
+			for (const id of ['simple', 'rich'] as const) {
+				it(`leaves the compound pipeline no text-and-element parent to rewrite in a ${id} message`, () => {
+					const unguarded = commitUnderTranslation({
+						before: withBadge(id, false, false),
+						after: withBadge(id, false, false),
+						pipeline: TranslatorPipelines.chromeCompound,
+					});
+					expect(unguarded.unsafeTextNodesBeforeTranslation).toBeGreaterThan(0);
+					expect(unguarded.htmlAfterTranslation).not.toBe(unguarded.htmlBeforeTranslation);
+
+					const guarded = commitUnderTranslation({
+						before: withBadge(id, false, true),
+						after: withBadge(id, true, true),
+						pipeline: TranslatorPipelines.chromeCompound,
+					});
+					expect(guarded.unsafeTextNodesBeforeTranslation).toBe(0);
+					expect(guarded.htmlAfterTranslation).toBe(guarded.htmlBeforeTranslation);
+					expect(guarded.error).toBeNull();
+				});
+			}
+			continue;
+		}
+
+		it(`renders a simple message safely under ${pipelineName}`, () => {
+			let unsafeTextNodes = -1;
+			const result = commitUnderTranslation({
+				before: withBadge('simple', false, true),
+				after: withBadge('simple', true, true),
+				pipeline: TranslatorPipelines[pipelineName],
+				inspect: (host) => {
+					unsafeTextNodes = findTranslationUnsafeTextNodes(host).length;
+				},
+			});
+			expect(result.htmlAfterTranslation).not.toBe(result.htmlBeforeTranslation);
+			expect(result.htmlAfterTranslation).toContain(TRANSLATION_MARKER);
+			expect(result.error).toBeNull();
+			expect(result.htmlBeforeTranslation).not.toContain('Monthly $5<i>x</i>');
+			expect(result.unsafeTextNodesBeforeTranslation).toBe(0);
+			expect(unsafeTextNodes).toBe(0);
+			expect(visibleText(result.htmlAfterCommit)).toBe('!Monthly $5x');
+		});
+
+		it(`renders a rich message safely under ${pipelineName}`, () => {
+			let unsafeTextNodes = -1;
+			const result = commitUnderTranslation({
+				before: withBadge('rich', false, true),
+				after: withBadge('rich', true, true),
+				pipeline: TranslatorPipelines[pipelineName],
+				inspect: (host) => {
+					unsafeTextNodes = findTranslationUnsafeTextNodes(host).length;
+				},
+			});
+			expect(result.htmlAfterTranslation).not.toBe(result.htmlBeforeTranslation);
+			expect(result.htmlAfterTranslation).toContain(TRANSLATION_MARKER);
+			expect(result.error).toBeNull();
+			expect(unsafeTextNodes).toBe(0);
+			expect(result.htmlAfterCommit).toContain('<strong>');
+			expect(visibleText(result.htmlAfterCommit)).toBe('!Renews on Jan 1. Enjoy!x');
+		});
+	}
+});
+
+describe('locale switch while the page is translated', () => {
+	for (const id of ['rich', 'nested'] as const) {
+		it(`reorders the ${id} message segments without throwing`, () => {
+			const result = commitUnderTranslation({
+				before: provided(message(id), true),
+				after: provided(message(id), true),
+				pipeline: TranslatorPipelines.chromeLegacyFont,
+				betweenCommits: () => {
+					i18n.activate('de');
+				},
+			});
+			expect(result.htmlAfterTranslation).not.toBe(result.htmlBeforeTranslation);
+			expect(result.htmlAfterTranslation).toContain(TRANSLATION_MARKER);
+			expect(result.error).toBeNull();
+			expect(visibleText(result.htmlAfterCommit)).toContain('Viel Spass!');
+		});
+	}
+});
+
+describe('translation-safe wrapping internals', () => {
+	it('recurses into nested rich message elements so no host element mixes text with element children', () => {
+		const result = commitUnderTranslation({
+			before: provided(message('nested'), true),
+			after: provided(message('nested'), true),
+			pipeline: TranslatorPipelines.chromeLegacyFont,
+		});
+		expect(result.unsafeTextNodesBeforeTranslation).toBe(0);
+	});
+
+	it('leaves nested rich message text unwrapped when it is not recursed into', () => {
+		const result = commitUnderTranslation({
+			before: provided(message('nested'), false),
+			after: provided(message('nested'), false),
+			pipeline: TranslatorPipelines.chromeLegacyFont,
+		});
+		expect(result.unsafeTextNodesBeforeTranslation).toBeGreaterThan(0);
+	});
+
+	it('remounts on a locale change so no stale translated segment survives', () => {
+		const result = commitUnderTranslation({
+			before: provided(message('rich'), true),
+			after: provided(message('rich'), true),
+			pipeline: TranslatorPipelines.chromeLegacyFont,
+			betweenCommits: () => {
+				i18n.activate('de');
+			},
+		});
+		expect(result.error).toBeNull();
+		expect(visibleText(result.htmlAfterCommit)).toContain('Viel Spass!');
+		expect(result.htmlAfterCommit.split(TRANSLATION_MARKER).length - 1).toBe(0);
+	});
+});

fluxer_app/src/features/i18n/components/AppI18nProvider.tsx

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {TranslationSafeMessage} from '@app/features/i18n/components/TranslationSafeMessage';
+import type {I18n} from '@lingui/core';
+import {I18nProvider} from '@lingui/react';
+import type {ReactNode} from 'react';
+
+export function AppI18nProvider({i18n, children}: {i18n: I18n; children?: ReactNode}): ReactNode {
+	return (
+		<I18nProvider i18n={i18n} defaultComponent={TranslationSafeMessage}>
+			{children}
+		</I18nProvider>
+	);
+}

fluxer_app/src/features/i18n/components/TranslationSafeMessage.tsx

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {useLingui} from '@lingui/react';
+import {cloneElement, Fragment, isValidElement, type ReactNode} from 'react';
+
+function wrapTextSegments(node: ReactNode, key?: string): ReactNode {
+	if (typeof node === 'string' || typeof node === 'number') {
+		return (
+			<flx-i18n key={key} data-flx="i18n.translation-safe-message.wrap-text-segments.flx-i18n">
+				{node}
+			</flx-i18n>
+		);
+	}
+	if (Array.isArray(node)) {
+		return node.map((child, index) => wrapTextSegments(child as ReactNode, `flx-i18n-${index}`));
+	}
+	if (isValidElement<{children?: ReactNode}>(node)) {
+		if (typeof node.type !== 'string' && node.type !== Fragment) {
+			return node;
+		}
+		const {children} = node.props;
+		if (children == null) {
+			return node;
+		}
+		return cloneElement(node, undefined, wrapTextSegments(children));
+	}
+	return node;
+}
+
+export function TranslationSafeMessage({children}: {children?: ReactNode}): ReactNode {
+	const {i18n} = useLingui();
+	return <Fragment key={i18n.locale}>{wrapTextSegments(children)}</Fragment>;
+}

fluxer_app/src/features/i18n/locales/auto-i18n-reviewed-unchanged.json

@@ -1293,6 +1293,9 @@
       {
         "msgid": "<0>{targetUserTag}</0> is currently timed out. You can update their timeout duration or remove the timeout."
       },
+      {
+        "msgid": "A lower price is available. Switching takes effect on <0>{listPriceEffectiveDate}</0> and changes nothing else."
+      },
       {
         "msgid": "AV1"
       },
@@ -1380,6 +1383,12 @@
       {
         "msgid": "Camera access is needed for device previews"
       },
+      {
+        "msgid": "Cancel price change"
+      },
+      {
+        "msgid": "Cancel the scheduled change to move to the current price instead."
+      },
       {
         "msgid": "Capture card"
       },
@@ -1443,6 +1452,9 @@
       {
         "msgid": "Could not load the instance configuration. Try reloading the page."
       },
+      {
+        "msgid": "Couldn't change your price"
+      },
       {
         "msgid": "Couldn't connect to voice. Please try again."
       },
@@ -1491,6 +1503,9 @@
       {
         "msgid": "Disable direct messages and friend requests"
       },
+      {
+        "msgid": "Disable translation DOM guard"
+      },
       {
         "msgid": "Drag members between voice channels they can access, and disconnect them from voice."
       },
@@ -1677,6 +1692,12 @@
       {
         "msgid": "Neko cat that chases your cursor"
       },
+      {
+        "msgid": "New price scheduled for <0>{pendingChangeDate}</0>."
+      },
+      {
+        "msgid": "New price scheduled for <0>{pendingChangeDate}</0>. Renewals will be {pendingTargetPriceLabel} from then on."
+      },
       {
         "msgid": "No application windows found"
       },
@@ -1692,6 +1713,9 @@
       {
         "msgid": "Nothing to search for"
       },
+      {
+        "msgid": "On <0>{listPriceEffectiveDate}</0> your subscription moves from {listPriceCurrentLabel} to {listPriceNewLabel}. Nothing is charged today, and the rest of your subscription stays exactly as it is."
+      },
       {
         "msgid": "Open Settings"
       },
@@ -2022,6 +2046,9 @@
       {
         "msgid": "Something is limiting this stream, so viewers are getting fewer frames than you asked for."
       },
+      {
+        "msgid": "Something went wrong while changing your price. Please try again in a moment."
+      },
       {
         "msgid": "Static Neko"
       },
@@ -2040,6 +2067,15 @@
       {
         "msgid": "Stream quality"
       },
+      {
+        "msgid": "Switch price"
+      },
+      {
+        "msgid": "Switch to the new price?"
+      },
+      {
+        "msgid": "Switch to {listPriceNewLabel}"
+      },
       {
         "msgid": "Symbol"
       },
@@ -2067,6 +2103,9 @@
       {
         "msgid": "The message to send."
       },
+      {
+        "msgid": "The new price is already scheduled for {effectiveDate}."
+      },
       {
         "msgid": "These options change how people use the instance. Some can only be chosen during setup."
       },
@@ -2142,6 +2181,9 @@
       {
         "msgid": "We don't send verification texts to this country. Try a mobile number from another country, or contact support."
       },
+      {
+        "msgid": "We lowered the price of {premiumProductName} in Brazil. It is now {monthlyPrice} a month or {yearlyPrice} a year."
+      },
       {
         "msgid": "We'll send a verification code to your email before you can view your backup codes."
       },
@@ -2184,6 +2226,15 @@
       {
         "msgid": "Your new nickname, or leave blank to reset it."
       },
+      {
+        "msgid": "Your subscription can't move to the new price right now."
+      },
+      {
+        "msgid": "Your subscription moves to the new price on {effectiveDate}."
+      },
+      {
+        "msgid": "Your subscription still ends on <0>{cancelDate}</0>. The current price is now {listPriceNewLabel}. If you reactivate, you can switch to it from here."
+      },
       {
         "msgid": "farewell"
       },
@@ -2220,6 +2271,12 @@
       {
         "msgid": "{name} copy"
       },
+      {
+        "msgid": "{premiumProductName} costs less now. Switch from {currentPrice} to {newPrice} a month starting {effectiveDate}, and nothing is charged today."
+      },
+      {
+        "msgid": "{premiumProductName} costs less now. Switch from {currentPrice} to {newPrice} a year starting {effectiveDate}, and nothing is charged today."
+      },
       {
         "msgid": "{productName} application logo"
       },