feat: health checks, graceful shutdown, rate limit, admin guard#200
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Chucks1093 merged 4 commits intoApr 26, 2026
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Include latest indexed ledger, observed head ledger, and computed sync lag in the detailed health endpoint response. Mark syncing status as degraded when lag exceeds threshold. Refs accesslayerorg#141
Implement shutdown signal handling for SIGINT and SIGTERM. Stop accepting new requests during drain window and complete in-flight requests within timeout. Returns 503 during drain period. Refs accesslayerorg#139
Create standardized rate-limit error response with consistent shape and retry-after metadata. Apply helper across rate-limited routes including the global rate limit middleware. Refs accesslayerorg#158
Add admin authorization middleware and indexer replay endpoint. Protect replay operation with x-admin-id header validation. Return consistent 403 forbidden response for unauthorized requests. Include audit logging and tests. Refs accesslayerorg#150
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Summary
Add chain-sync lag metrics to health checks, graceful shutdown handling for in-flight requests, unified 429 rate-limit error responses, and admin-guarded index replay endpoint.
Testing
pnpm lintpnpm buildpnpm exec prisma generatewhen schema or generated types changedChecklist
Closes #141
Closes #139
Closes #158
Closes #150