feat(backend): SQL optimization, error recovery, security audit, rate limiting#1014
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… audit, rate limiting for websocket relay and payment processor - emdevelopa#919: websocket-relay-queries.js — paginated getRecentEvents, batch batchInsertEvents, SKIP LOCKED dequeueNextEvent; all queries guarded with SET LOCAL statement_timeout = 5s; index recommendations documented - emdevelopa#920: websocket-relay-recovery.js — exponential backoff reconnectWithBackoff, three-state CircuitBreaker (CLOSED/OPEN/HALF_OPEN), DeadLetterQueue, getRelayHealth snapshot - emdevelopa#921: websocket-relay-security.js — validateOrigin whitelist, enforceMessageSizeLimit (64 KiB default), verifyRelayToken (HS256 only), sanitizeRelayMessage (unknown-field stripping), auditRelayEvent structured logging - emdevelopa#922: payment-rate-limiter.js — in-memory sliding-window Express middleware; X-RateLimit-* headers; 429 with retryAfter; independent per-key tracking; no Redis dependency All 80 new tests pass (vitest).
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Closing in favour of a replacement PR with correct issue linking. |
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Summary
websocket-relay-queries.jsaddsgetRecentEvents(paginated, descending),batchInsertEvents(single multi-rowINSERT), anddequeueNextEvent(SELECT … FOR UPDATE SKIP LOCKED). All three wrap queries inSET LOCAL statement_timeout = '5s'. Index recommendations are documented in the file header.websocket-relay-recovery.jsprovidesreconnectWithBackoff(exponential backoff + jitter),CircuitBreaker(CLOSED/OPEN/HALF_OPEN states, configurable threshold + reset timeout),DeadLetterQueue(failed messages with error metadata + retry count), andgetRelayHealth(single snapshot for monitoring).websocket-relay-security.jsaddsvalidateOrigin(exact-match whitelist, no wildcards),enforceMessageSizeLimit(64 KiB default, works on strings/Buffers/objects),verifyRelayToken(HS256-onlyjsonwebtokenwrapper),sanitizeRelayMessage(strips unknown fields, requirestype), andauditRelayEvent(structured JSON audit log).payment-rate-limiter.jsprovidescreatePaymentRateLimiter— an in-memory sliding-window Express middleware with per-key tracking,X-RateLimit-*headers, 429 +retryAfterbody, and automatic eviction of stale entries. No Redis dependency.Test plan
npx vitest run src/lib/websocket-relay-queries.test.js src/lib/websocket-relay-recovery.test.js src/lib/websocket-relay-security.test.js src/middleware/payment-rate-limiter.test.js)npm test)closes #919
closes #920
closes #921
closes #922