/eth/v1/validator/prepare_beacon_proposer returns 404

[mcdee]

trafficstars

The beacon node API endpoint /eth/v1/validator/prepare_beacon_proposer is not available in the nimbus beacon node. this should be present as per the spec information at https://ethereum.github.io/beacon-APIs/#/ValidatorRequiredApi/prepareBeaconProposer

$ curl -s -w "%{http_code}\n" -H 'Content-type: application/json' --data '[{"validator_index": "1","fee_recipient": "0xabcf8e0d4e9587369b2301d0790347320302cc09"}]' http://localhost:xxxx/eth/v1/validator/prepare_beacon_proposer
404

[mcdee]

Is there any plan to implement this prior to the prater/goerli merge? This stops Vouch from being able to use nimbus for merged chains.

[zah]

This have been implemented for the 22.7.0 release, but our implementation had a spec violation that precluded actual usage. The issue is tracked in https://github.com/status-im/nimbus-eth2/issues/3920 and we expect the fix to be shipped in 22.8.0