[1013] Improve Blockchain Indexer Reliability with Checkpointing - #1053
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Persist ledger and event cursor checkpoints transactionally, verify checksum integrity on resume, and deduplicate processed events to support safe crash recovery without duplicate execution. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
IndexerCheckpointServiceand extendsIndexerStatefor per-stream resume after crashes or restarts.Checkpoint persistence approach
(contractId, eventId)constraints for idempotency.Test coverage
Closes #1013
Made with Cursor