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feat(protocol): encode proposer address in L2 block header #18770

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feat(protocol): encode proposer address in L2 block header #18770

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15 changes: 14 additions & 1 deletion packages/protocol/contracts/layer1/based/TaikoInbox.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -128,7 +128,9 @@ abstract contract TaikoInbox is EssentialContract, ITaikoInbox, ITaiko, IFork {
txListHash: calldataUsed
? keccak256(_txList)
: _calcTxListHash(params.firstBlobIndex, params.numBlobs),
extraData: bytes32(uint256(config.baseFeeConfig.sharingPctg)),
// Ensure L2 block header has the proposer adddress so that blocks in p2p network can be
// verified based on the proposer address.
extraData: _encodeExtraData(config.baseFeeConfig.sharingPctg, params.proposer),
coinbase: params.coinbase,
batchId: stats2.numBatches,
gasLimit: config.blockMaxGasLimit,
Expand Down Expand Up @@ -670,6 +672,17 @@ abstract contract TaikoInbox is EssentialContract, ITaikoInbox, ITaiko, IFork {
require(_params.blocks.length <= _maxBlocksPerBatch, TooManyBlocks());
}

function _encodeExtraData(
uint8 _baseFeeSharingPctg,
address _proposer
)
private
pure
returns (bytes32)
{
return bytes32(uint256(_baseFeeSharingPctg) << 160 | uint160(_proposer));
}

// Memory-only structs ----------------------------------------------------------------------

struct SyncBlock {
Expand Down