feat: add idempotent ledger checkpoint system - #650
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Chucks1093 merged 3 commits intoJul 27, 2026
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- Add local setup guide with prerequisites, step-by-step instructions, and troubleshooting - Add API endpoint reference with all public endpoints, auth requirements, and sample responses - Cross-link both documents for easy navigation Closes accesslayerorg#598
- Add LedgerCheckpoint Prisma model with ledger, lastProcessedEventIndex, batchHash, completedAt - Create checkpoint service with write, read, validate, and resume functions - Non-blocking checkpoint writes with 5s timeout - Batch hash mismatch detection triggers warn log and reprocess - Integrate checkpointing into event processor with ledger-grouped processing - Add unit and integration tests for checkpoint operations Closes accesslayerorg#632
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Nice work on this. The checkpoint system is a clean solution. Grouping events by ledger and writing the checkpoint after each batch makes restarts safe without any complex state to manage. The 5s timeout on checkpoint writes is a good call too, it keeps the main flow from stalling if the write is slow. Good test coverage as well. |
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📌 Summary
Adds a ledger checkpoint system to prevent duplicate event processing after indexer restarts.
🎯 Purpose / Motivation
When the indexer restarts mid-batch, it currently has no reliable mechanism to resume from the exact ledger and event offset. This causes duplicate trade records and gaps in trade history. A checkpoint system makes restart recovery deterministic and safe.
🛠️ Changes Made
LedgerCheckpointPrisma model with ledger, lastProcessedEventIndex, batchHash, completedAt🧪 How to Test
pnpm testto verify all tests passLedgerCheckpointmodel is in Prisma schema🔗 Related Issues
Closes #632
✅ Checklist