feat: Soroban event listener with reconnect, dedup, and polling fallback#94
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Arowolokehinde wants to merge 1 commit into
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feat: Soroban event listener with reconnect, dedup, and polling fallback#94Arowolokehinde wants to merge 1 commit into
Arowolokehinde wants to merge 1 commit into
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Implements the background event streaming service for the escrow contract
(closes issue on Horizon/Soroban event listener with polling fallback).
Key changes:
- EscrowEventListener: cursor-based RPC polling with full-jitter exponential
backoff, injectable deps for testability, and isHealthy() signal exposed
on /health for the polling-fallback UX
- event-dispatcher: pure parseEscrowEvent + idempotent applyEscrowEvent;
released → completed, refunded → cancelled, both guarded with NOT IN
terminal states to prevent double-mutations
- Deduplication via existing processed_tx table (evt:{id} keys, O(1) PK lookup)
- contract_trade_id column on trades (sha256 of secret_hash) for O(1)
event → trade lookup; populated at lock time
- event_cursor table persists polling position across restarts; atomic
UPSERT on PostgreSQL, check-then-set on in-memory fallback
- Graceful cursor reset when RPC 7-day window is exceeded after long downtime
- 20 tests across 7 suites (no network or PostgreSQL required)
- Existing frontend polling and Horizon confirmation loop untouched
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@Arowolokehinde Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits. You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀 |
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Implements the background event streaming service for the escrow contract (closes issue on Horizon/Soroban event listener with polling fallback).
Closes #85
Key changes: