feat(api): attester duties, committees, and bulk validator status endpoints - #823
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Add three general-purpose read APIs that expose data Dora already computes
internally, so external tools can resolve attester committees and validator
status without a beacon node:
- GET /api/v1/epoch/{epoch}/duties - attester committees per slot for an epoch
- GET /api/v1/slot/{slot}/committees - attester committees for a single slot
- GET|POST /api/v1/validators/status - bulk validator status (up to 10k indices)
Also expose `slashed` and `withdrawable_epoch` on GET /api/v1/validators.
Committees are served from in-memory epoch stats with a blockdb fallback (no
beacon-node call). Duties return 404 when unavailable for an epoch so callers
can distinguish "no data" from "empty". Swagger regenerated.
APIEpochDutiesV1 called GetSlotCommittees for every slot in the epoch. On the blockdb/S3 fallback path each of those calls loads the entire epoch duties object, so a full epoch reloaded the same object once per slot (32x on mainnet). Add ChainService.GetEpochCommittees(epoch), which resolves committees for all slots from a single source read (in-memory epoch stats, or one blockdb GetEpochDuties fetch), and switch the handler to it.
barnabasbusa
approved these changes
Aug 6, 2026
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Summary
Adds three general-purpose read-only API endpoints that surface data Dora already computes internally, so external tools (validator monitors, slashers, staking dashboards) can resolve attester committees and validator status without a beacon node.
New endpoints
/api/v1/epoch/{epoch}/duties/api/v1/slot/{slot}/committees?committee=0,1,2filter)/api/v1/validators/status?indices=or{"indices":[...]})Also adds
slashedandwithdrawable_epochtoGET /api/v1/validators(APIValidatorInfo).Details
ChainService.GetSlotCommittees— in-memory epoch stats with a blockdb fallback for finalized epochs. No beacon-node call; Dora computes the shuffling locally.epoch/{epoch}/dutiesreturns 404 only when all slots lack duties, so callers can distinguish "no data" from "empty". Future epochs beyond currentEpoch+1 return 400.validators/statuscaps at 10,000 indices; missing indices are omitted. Status derived as invalidator_v1.go.startApiwith call costs and OPTIONS; swaggo annotations added anddocs/regenerated viamake api-docs.Motivation
These back the slashoor slasher (which uses Dora as its durable block/duty store), but each is a standalone general-audience explorer API.
Checks
go build,go vet,gofmt -s, andgolangci-lint run --new-from-rev=origin/masterall pass.