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feat(api): consume blocks via gRPC StreamBlocks (flagged, default off)#941

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raymondjacobson merged 1 commit into
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feat/consume-block-stream
Jun 9, 2026
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feat(api): consume blocks via gRPC StreamBlocks (flagged, default off)#941
raymondjacobson merged 1 commit into
mainfrom
feat/consume-block-stream

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Summary

Bumps go-openaudio to aee578e (OpenAudio/go-openaudio#342) and wires the core-indexer to source blocks from the CoreService.StreamBlocks gRPC stream instead of polling GetBlocks, behind a new coreBlockStreamEnabled env — default off, so prod behavior is unchanged until flipped.

What #342 gives us

The ETL can now consume blocks over a gRPC server stream: the node replays history from the resume height, then live-tails, gap-filling any heights its in-process pubsub drops. The ETL reconnects from its cursor on error and auto-falls-back to polling if the endpoint doesn't support the stream.

Changes

  • go.mod/go.sum: github.com/OpenAudio/go-openaudio (+ /pkg/etl) → v1.3.1-0.20260609211151-aee578ec923b
  • config/config.go: new CoreBlockStreamEnabled (coreBlockStreamEnabled env, default off)
  • indexer/indexer.go: when enabled, set Config.BlockStreamEnabled and pass a gRPC (connect.WithGRPC) Core client via SetBlockStreamClient. The SDK's unary Core client is retained for status checks + the polling fallback.

Rollout

  1. Merge with the flag unset → no behavior change (still polling).
  2. Set coreBlockStreamEnabled=true on one indexer and validate: it tails live, resumes gap-free on restart, and (induced) stream errors fall back to polling cleanly.
  3. The one open question is whether the prod LB/ingress in front of the validator passes long-lived h2 gRPC streams — this single-indexer step is where that gets confirmed. If it doesn't, leave the flag off; polling is unaffected.

Validated locally with the harness in OpenAudio/go-openaudio#344 (devnet, --stream, catch-up + restart-resume).

Test plan

  • go mod tidy (only go.mod/go.sum), go build ./..., go vet ./indexer ./config clean
  • Staging: flip coreBlockStreamEnabled=true on one indexer; confirm live-tail + gap-free restart + fallback

🤖 Generated with Claude Code

Bumps go-openaudio to aee578e (#342) and wires the core-indexer to source
blocks from CoreService.StreamBlocks instead of polling GetBlocks, gated by a
new coreBlockStreamEnabled env (default off).

When enabled, builds a gRPC (connect.WithGRPC) Core client from audiusdUrl and
passes it via SetBlockStreamClient + Config.BlockStreamEnabled. The SDK's unary
Core client is retained for status checks and the polling fallback, and the ETL
auto-falls-back to polling if the endpoint doesn't support the stream — so this
is safe to flip on per environment.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
@raymondjacobson raymondjacobson merged commit 237b2af into main Jun 9, 2026
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@raymondjacobson raymondjacobson deleted the feat/consume-block-stream branch June 9, 2026 21:36
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