/eth/v1/beacon/light_client/finality_update

Get the latest known 'LightClientFinalityUpdate'.

Asks for the most recent LightClientFinalityUpdate that the server is aware of. Either JSON or SSZ-serialized bytes may be returned, depending on the Accept header.

Results as specified in create_light_client_finality_update MUST be provided by servers.

Example Request and Result for /v1/beacon/light_client/finality_update

In this section, we provide an illustrative example of a request made to retrieve details contents using the /v1/beacon/light_client/finality_update endpoint. Additionally, we present the resulting response containing information about the latest known clinet finality update.

Parameters

• none

The example in this section uses a non-existing project id.

Make sure you replace it with your Ethereum Holesky Beacon endpoint when issuing the API calls.

Don't have a project id? Here's a straightforward guide on how to obtain one!

Get the latest known 'LightClientFinalityUpdate'.

GET https://eth-holesky-beacon.blastapi.io/<project-id>/eth/v1/beacon/light_client/finality_update

200: OK Expand for a detailed response example

{
  "version": "capella",
  "data": {
    "attested_header": {
      "slot": "936585",
      "proposer_index": "1274397",
      "parent_root": "0xfb49a1b7b1e9f5da6ea47d710ff2f937ce96160f6de5e095e75240afbe1d706d",
      "state_root": "0x7a54a9fb6cb3dd8176767665e5724da99922be3e0c2eb5b416374327ad07d020",
      "body_root": "0xb123ae1ffce36256def325bfe8ccb8b7720ac103ef2bdf3ad7596d5c0e766dc7"
    },
    "next_sync_committee": null,
    "finalized_header": {
      "slot": "936512",
      "proposer_index": "68263",
      "parent_root": "0x18aff1b6565c694a25b03e9342ac334d4241586092325147bbee0f18caffddfc",
      "state_root": "0x83cfcc79fb531c9159c57bf439b586eb05d04d2c1c7a2edfcb607de26f4f69eb",
      "body_root": "0x9a1a17881a67ca7e93f29370ddedb299587f5831a4c43aa26d93b26ff4d8696a"
    },
    "sync_aggregate": {
      "sync_committee_bits": "0xfffefbfdffdffefefefff7ffbfff6fffef7ffa7effff5fbff7dbfdd3dffeffff3bb6fffffff7ebeffddffeed6efdfddffdf67f9ef7ffffffffffbffffffedefb",
      "sync_committee_signature": "0x9768c609251a33b9c8592a4bde338a72f577a1effe988befb41edd1da21a71bd4f094df45973fae323709983889f821712c06821de39dc9ca52f127ccbc5e65ca4ca5d82a8a56fbd2e33c24092d9bd41cf4c803beb472b528ad3060ed69e5ca1"
    },
    "next_sync_committee_branch": null,
    "finality_branch": [
      "0x5272000000000000000000000000000000000000000000000000000000000000",
      "0x7b1d506a26e3b4aca72979c24b10919d34f332d7e5b0ea542e78da94eddeda7b",
      "0xc0414d93308fea019f06b383c61d17f81e79afea30d83afdd46cea1cd038e963",
      "0x2a92d1094aec1c7f89796053dd6753f2879a5cf48996a9d8bf04695a3a92cb0b",
      "0x9ac2dd2d348b89d675c1c0b9e8af0feb958671c998a0b5bb737692341adbe9c7",
      "0x5087fe40e7f611847bd9ef9c857039627e367a6aa8ca3a8cfb2d450d629fdb40"
    ],
    "signature_slot": "936586"
  }
}

Curl Request example

curl -X 'GET' \
  'https://eth-holesky-beacon.blastapi.io/<project_id>/eth/v1/beacon/light_client/finality_update' \
  -H 'accept: application/json'