feat(backend): Payment Processor security, error recovery, SQL optimization, and signature verification#1007
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…odule Add PaymentSignatureVerifier module that centralizes all signature verification operations for the Payment Processor: - HMAC-SHA256 payload signing and verification - Request timestamp signing with replay protection - Transaction hash computation - Ed25519 signature verification with result caching - Unified facade API for all verification operations
- Replace inline signature verification with centralized PaymentSignatureVerifier - Add structured security logging for payment creation and verification events - Log signature verification failures with full context for audit trail - Add merchant ID to signature verification calls for per-merchant caching
Improve the ErrorRecovery circuit breaker with production-grade features: - Exponential backoff with jitter for retry delays - Proper half-open state transitions with configurable success threshold - Error classification (transient, permanent, rate-limited, auth) - Structured logging with label context and error categories - Recovery metrics tracking (attempts, successes, failures, trips) - Factory functions for Payment Processor, Horizon API, and Database recovery - Configurable options (maxRetries, failureThreshold, resetTimeout, delays)
Add targeted database indexes to improve query performance: - Covering index for payment status endpoint (avoids heap lookups) - Partial index for confirmed payment refund lookups - Composite index for path payment quote lookups - Covering index for rolling metrics time-range aggregation - GIN index for description text search (when extension available)
Add comprehensive security audit test suite covering: - Input validation for payment session creation - Parameterized SQL query verification (injection prevention) - LIKE pattern escaping for search queries - Payment status caching security (pending vs confirmed) - Error handling and status code propagation - Signature verification integration end-to-end
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2 participants
Closes #926, Closes #925, Closes #924, Closes #923
Type of Change
Summary
This PR addresses 4 related issues for the Payment Processor module: security audit, error recovery enhancement, SQL query optimization, and cryptographic signature verification. A centralized
PaymentSignatureVerifiermodule centralizes all signature operations with HMAC-SHA256 signing, timestamp verification, replay protection, and result caching. TheErrorRecoverycircuit breaker was enhanced with exponential backoff with jitter, proper half-open state transitions, and error classification. A new database migration adds 6 targeted indexes to optimize payment listing, refund lookups, and rolling metrics queries. Security audit tests verify parameterized query usage, input validation, SQL injection prevention, and signature verification integration.Motivation / Context
Closes #923 — Add cryptographic signature verification to Payment Processor
Closes #924 — Optimize SQL queries in Payment Processor
Closes #925 — Enhance error recovery for Payment Processor
Closes #926 — Conduct security audit on Payment Processor
Changes Made
Issue #923 — Cryptographic Signature Verification:
src/lib/payment-signature-verification.jswith HMAC-SHA256 payload signing, request timestamp verification with replay protection, transaction hash computation, and a unifiedpaymentSignatureVerifierfacadepaymentService.jsreplacing inline verificationIssue #924 — SQL Query Optimization:
20260625000001_optimize_payment_processor_indexes.jswith 6 targeted indexes:Issue #925 — Error Recovery Enhancement:
services/path-payment/errorRecovery.tswith exponential backoff with jitter, proper half-open state transitions with configurable success threshold, error classification (transient/permanent/rate-limited/auth), structured logging, recovery metrics, and factory functions for different recovery scenariosIssue #926 — Security Audit:
paymentService.js