[r33] fix(caplin): Fixes for DataColumnSidecar (#18268)#19003
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Based on the spec, index should return as a string from the API [Contributoor](https://github.com/ethpandaops/contributoor) is not working for Caplin because [attestantio](https://github.com/attestantio/go-eth2-client/blob/v0.27.2/api/v1/datacolumnsidecarevent.go) assumes the index to be a string and panics because it's a integer. The [swagger](https://ethereum.github.io/beacon-APIs/#/Debug/getDebugDataColumnSidecars) also says index should be a string. Additionally, the correct API path for `data_column_sidecars` is `/eth/v1/debug/beacon/data_column_sidecars` I also added `block_root` and `slot` to the SSE events Based on my testing caplin now mirrors the behavior of lighthouse, the REST API is matching the swagger/spec, and SSE is mirroring that of lighthouse and nimbus
domiwei
approved these changes
Feb 6, 2026
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cherry-pick #18268
Based on the spec, index should return as a string from the API
Contributoor is not working for Caplin because
attestantio assumes the index to be a string and panics because it's a integer.
The
swagger also says index should be a string.
Additionally, the correct API path for
data_column_sidecarsis/eth/v1/debug/beacon/data_column_sidecarsI also added
block_rootandslotto the SSE eventsBased on my testing caplin now mirrors the behavior of lighthouse, the REST API is matching the swagger/spec, and SSE is mirroring that of lighthouse and nimbus