EIP-4844 External Signer integration for blob sidecar and blinded blob sidecar

[usmansaleem]

PR Description

External signer integration for offloading signing request for blob sidecar and blinded blob sidecar (EIP 4844)

Summary of changes:

tech.pegasys.teku.validator.client.signer

• ExternalSigner: Implemented signBlobSidecar and signBlindedBlobSidecar. Both methods send BlindedBlobSidecar converted to json. The BlobSidecar.getBlob().hashTreeRoot() makes it compatible with
  BlindedBlobSidecar for the purpose of calculating signature remotely.
• SignType: Introduced SignType.BLOB_SIDECAR
• ExternalSignerDenebIntegrationTest: Integration test for above methods.

tech.pegasys.teku.api.schema

• BlindedBlobSidecar: To convert internal BlobSidecar and BlindedBlobSidecar to JSON. Used by ExternalSigner.
• KZGProof: Used in BlindedBlobSidecar class.

tech.pegasys.teku.provider

• JsonProvider Register KZGProof serializer and deserializer i.e. KZGProofSerializer and KZGProofDeserializer that helps in de/serializing BlindedBlobSidecar.

The resultant JSON request would look like:

{
  "signingRoot" : "0x0ea97276a6af2d49815d0e7061280c81a480ca0291110ab3d00879ea24eec6de",
  "type" : "blob_sidecar",
  "fork_info" : {
    "genesis_validators_root" : "0x103ac9406cdc59b89027eb1c9e97f607dd5fdccfa8fb2da4eaeea9d25032add9",
    "fork" : {
      "previous_version" : "0x235bc340",
      "current_version" : "0x367cbd40",
      "epoch" : "4669978815449698508"
    }
  },
  "blob_sidecar" : {
    "block_root" : "0x8200a6402ca295554fb9562193cc71d60272d63beeaf2201fdf53e846e77f919",
    "index" : "4663368873993027404",
    "slot" : "4661716390776343276",
    "block_parent_root" : "0x1f86d83f0bf91cc0d7e07410828140e0dddbb331dc20b6743f9f79e549b50b11",
    "proposer_index" : "4598922002772542634",
    "blob_root" : "0xa1c1d7626338e1a3a4c162fe5837fe526866ee2ff3fdcbf0e8b9bd6755eeef0c",
    "kzg_commitment" : "0x0c65de3f6bad3d7be19d0de5aff82b13d6d8b49f26588dba111e361d6f5454861bed3cdff318101d882b08568904dc47",
    "kzg_proof" : "0x6b0ac13f8a279ad3abec11bed1a49214f6e7af79b643595df6a38706b338e93b118b1bb9d7fd71c2eca457b36debcec7"
  }
}

Fixed Issue(s)

fixes #6963

Documentation

• I thought about documentation and added the doc-change-required label to this PR if updates are required.

Changelog

• I thought about adding a changelog entry, and added one if I deemed necessary.

[StefanBratanov]

LGTM. Thanks a lot. :)

[usmansaleem]

The openapi spec for these changes are covered here: ethereum/remote-signing-api#4

[StefanBratanov]

The openapi spec for these changes are covered here: ethereum/remote-signing-api#4

Oh great. I knew there were discussions about such a repo. Great to see it up and running. :)