feat: add GET /api/sync-progress endpoint (COW-985)#74
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lgahdl merged 3 commits intoMay 29, 2026
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Returns per-chain historical sync progress as clean JSON: totalBlocks, processedBlocks, progressPct (0-100), isRealtime, isComplete. Reads from Ponder's Prometheus /metrics endpoint using the request origin so it works on any port. Registered in OpenAPI/Swagger. 6 integration tests covering: status code, chain entries, processedBlocks calculation, progressPct rounding, realtime/complete flags, and graceful degradation when /metrics is unreachable. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…W-985) Add non-null assertions for Record<string, T> index access under noUncheckedIndexedAccess. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Did you add this new route to the documentation?
/sync-progress
Add entry in REST endpoints section and a dedicated subsection with example response and field descriptions. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
jeffersonBastos
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Summary
Adds a
GET /api/sync-progressendpoint that returns per-chain historical sync progress in clean JSON. Addresses the client ask: "nice to get a sense of how far we are from being ready".Example response while backfilling:
{ "mainnet": { "totalBlocks": 7313715, "processedBlocks": 2906029, "progressPct": 39.7, "isRealtime": false, "isComplete": false }, "gnosis": { "totalBlocks": 17024177, "processedBlocks": 2399220, "progressPct": 14.1, "isRealtime": false, "isComplete": false } }Example response once fully synced:
{ "mainnet": { "progressPct": 100.0, "isRealtime": true, "isComplete": true, ... }, "gnosis": { "progressPct": 100.0, "isRealtime": true, "isComplete": true, ... } }Implementation
Reads from Ponder's built-in
GET /metricsPrometheus endpoint using the incoming request's origin (no hardcoded port). Parsesponder_historical_total_blocks,ponder_historical_completed_blocks,ponder_historical_cached_blocks,ponder_sync_is_realtime, andponder_sync_is_complete. Degrades gracefully if/metricsis unreachable (returns{}).Registered in the OpenAPI spec — visible in Swagger UI at
/docs.Test plan
pnpm typecheck && pnpm lintpassesRelated Issues
COW-985
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