Description

Currently, we're missing the debug_getRawHeader method.

Solution

• Implement debug_getRawHeader method
• Check conformity tests
• Edit openrpc.json and rpc-api.md
• Add tests (if needed)

Missing fields in the Hedera concept:

fee_recipient

• Address that receives transaction priority fees and MEV for the block
• Set by the block proposer
• Separates who proposes the block from who gets paid

prev_randao

• On-chain randomness value from the Proof-of-Stake RANDAO
• Used for validator selection and committee assignments
• Represents accumulated randomness up to the previous step (not perfectly random)

withdrawal_root

• Merkle root committing to all validator withdrawals in the block
• Links consensus-layer withdrawals to execution-layer processing

RPC method:

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "debug_getRawHeader",
  "params": [
    "latest" // block number or block hash
  ]
}

Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0xf90211a0..." // RLP encoded header
}

Note:

• fee_recipient - use 0.0.801 based on https://hips.hedera.com/hip/hip-1259
• prevRandao - use block.difficulty - 0x0
• withdrawal_root - use computed hash of an empty Trie object - 0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421

Related issue(s)

Fixes #4891

Testing Guide

Changes from original design (optional)

N/A

Additional work needed (optional)

N/A

Checklist

• I've assigned an assignee to this PR and related issue(s) (if applicable)
• I've assigned a label to this PR and related issue(s) (if applicable)
• I've assigned a milestone to this PR and related issue(s) (if applicable)
• I've updated documentation (code comments, README, etc. if applicable)
• I've done sufficient testing (unit, integration, etc.)