getBlockHeader

Overview

The getBlockHeader endpoint allows you to retrieve a specific beacon block header from the Ethereum 2.0 Beacon Chain based on its unique block ID.

Example use cases:

1. Header Retrieval: Developers and network administrators can use this endpoint to fetch the header of a specific beacon block for analysis or verification purposes.
2. Validator Operations: Validators may need to retrieve specific beacon block headers for proposing and attesting to blocks.

Parameters

Returns

• execution_optimistic (boolean): true if the response references an unverified execution payload. Optimistic information may be invalidated at a later time. If the field is not present, assume the false value.
• finalized (boolean): If the response mentions the chain's final history picked by forks, it's true. Without the field, more calls are needed to compare the requested epoch with the final checkpoint.
• data (object array): The data object with the following fields:
  • root (string, hex): The root is a hexadecimal string representing the root hash of the beacon block header. It follows the pattern: ^0x[a-fA-F0-9]{64}$.
  • canonical (boolean): true if the block header is considered canonical, indicating it's part of the main chain.
  • header (object): The header object contains detailed information about the beacon block header.
    • message (array): The BeaconBlockHeader object
      • slot (string): The slot to which this block corresponds
      • proposer_index (string): The index of validator in validator registry
      • parent_root (string): The signing merkle root of the parent BeaconBlock
      • state_root (string): The tree hash merkle root of the BeaconState for the BeaconBlock
      • body_root (string): The tree hash merkle root of the BeaconBlockBody for the BeaconBlock
    • signature (string): The signature

Request Example

// Import necessary libraries and modules
import { TatumSDK, Ethereum, Network } from '@tatumio/tatum'

// Initialize the Tatum SDK with Ethereum-specific parameters
const tatum = (await TatumSDK.init) < Ethereum > { network: Network.ETHEREUM }

// Specify the block ID
const BlockId = '0xabcdef1234567890'

// Retrieve the beacon block header using the getBlockHeader method
const beaconHeader = await tatum.rpc.beacon.v1.getBlockHeader({ blockId: BlockId })

// Destroy Tatum SDK - needed for stopping background jobs
await tatum.destroy()