refactor(protocol): introduce BlockV2 for client-side compability

packages/protocol/contracts/L1/TaikoData.sol

@@ -159,6 +159,22 @@ library TaikoData {
  /// @dev Struct containing data required for verifying a block.
  /// 3 slots used.
  struct Block {
+ bytes32 metaHash; // slot 1
+ address assignedProver; // slot 2
+ uint96 livenessBond;
+ uint64 blockId; // slot 3
+ uint64 proposedAt; // timestamp
+ uint64 proposedIn; // L1 block number, required/used by node/client.
+ uint32 nextTransitionId;
+ // The ID of the transaction that is used to verify this block. However, if
+ // this block is not verified as the last block in a batch, verifiedTransitionId
+ // will remain zero.
+ uint32 verifiedTransitionId;
+ }
+
+ /// @dev Struct containing data required for verifying a block.
+ /// 3 slots used.
+ struct BlockV2 {
  bytes32 metaHash; // slot 1
  address assignedProver; // slot 2
  uint96 livenessBond;
@@ -213,16 +229,15 @@ library TaikoData {
  /// @dev Struct holding the state variables for the {TaikoL1} contract.
  struct State {
  // Ring buffer for proposed blocks and a some recent verified blocks.
- mapping(uint64 blockId_mod_blockRingBufferSize => Block blk) blocks;
+ mapping(uint64 blockId_mod_blockRingBufferSize => BlockV2 blk) blocks;
  // Indexing to transition ids (ring buffer not possible)
  mapping(uint64 blockId => mapping(bytes32 parentHash => uint24 transitionId)) transitionIds;
  // Ring buffer for transitions
  mapping(
  uint64 blockId_mod_blockRingBufferSize
  => mapping(uint32 transitionId => TransitionState ts)
  ) transitions;
- // Ring buffer for Ether deposits
- bytes32 __reserve1;
+ bytes32 __reserve1; // Used as a ring buffer for Ether deposits
  SlotA slotA; // slot 5
  SlotB slotB; // slot 6
  mapping(address account => uint256 bond) bondBalance;

packages/protocol/contracts/L1/TaikoL1.sol

@@ -211,6 +211,14 @@ contract TaikoL1 is EssentialContract, ITaikoL1, TaikoEvents {
  /// @param _blockId Index of the block.
  /// @return blk_ The block.
  function getBlock(uint64 _blockId) external view returns (TaikoData.Block memory blk_) {
+ (TaikoData.BlockV2 memory blk,) = LibUtils.getBlock(state, getConfig(), _blockId);
+ blk_ = LibData.blockV2toV1(blk);
+ }
+
+ /// @notice Gets the details of a block.
+ /// @param _blockId Index of the block.
+ /// @return blk_ The block.
+ function getBlockV2(uint64 _blockId) external view returns (TaikoData.BlockV2 memory blk_) {
  (blk_,) = LibUtils.getBlock(state, getConfig(), _blockId);
  }
 
@@ -291,7 +299,7 @@ contract TaikoL1 is EssentialContract, ITaikoL1, TaikoEvents {
  }
 
  /// @inheritdoc ITaikoL1
- function getConfig() public pure virtual override returns (TaikoData.Config memory) {
+ function getConfig() public pure virtual returns (TaikoData.Config memory) {
  return TaikoData.Config({
  chainId: LibNetwork.TAIKO_MAINNET,
  blockMaxProposals: 324_000, // = 7200 * 45

packages/protocol/contracts/L1/libs/LibData.sol

@@ -84,4 +84,23 @@ library LibData {
  baseFeeConfig: TaikoData.BaseFeeConfig(0, 0, 0, 0, 0)
  });
  }
+
+ function blockV2toV1(
+ TaikoData.BlockV2 memory _v2
+ )
+ internal
+ pure
+ returns (TaikoData.Block memory)
+ {
+ return TaikoData.Block({
+ metaHash: _v2.metaHash,
+ assignedProver: _v2.assignedProver,
+ livenessBond: _v2.livenessBond,
+ blockId: _v2.blockId,
+ proposedAt: _v2.proposedAt,
+ proposedIn: _v2.proposedIn,
+ nextTransitionId: _v2.nextTransitionId,
+ verifiedTransitionId: _v2.verifiedTransitionId
+ });
+ }
 }

packages/protocol/contracts/L1/libs/LibProposing.sol

@@ -115,7 +115,7 @@ library LibProposing {
  }
 
  // Verify params against the parent block.
- TaikoData.Block storage parentBlk =
+ TaikoData.BlockV2 storage parentBlk =
  _state.blocks[(local.b.numBlocks - 1) % _config.blockRingBufferSize];
 
  if (local.postFork) {
@@ -215,7 +215,7 @@ library LibProposing {
  }
 
  // Create the block that will be stored onchain
- TaikoData.Block memory blk = TaikoData.Block({
+ TaikoData.BlockV2 memory blk = TaikoData.BlockV2({
  metaHash: local.postFork ? keccak256(abi.encode(meta_)) : keccak256(abi.encode(metaV1_)),
  assignedProver: address(0),
  livenessBond: local.postFork ? 0 : meta_.livenessBond,

packages/protocol/contracts/L1/libs/LibProving.sol

@@ -175,7 +175,7 @@ library LibProving {
  }
 
  local.slot = meta.id % _config.blockRingBufferSize;
- TaikoData.Block storage blk = _state.blocks[local.slot];
+ TaikoData.BlockV2 storage blk = _state.blocks[local.slot];
 
  local.proposedAt = local.postFork ? meta.proposedAt : blk.proposedAt;
 
@@ -389,7 +389,7 @@ library LibProving {
  /// @dev Handle the transition initialization logic
  function _fetchOrCreateTransition(
  TaikoData.State storage _state,
- TaikoData.Block storage _blk,
+ TaikoData.BlockV2 storage _blk,
  TaikoData.Transition memory _tran,
  Local memory _local
  )
@@ -468,7 +468,7 @@ library LibProving {
  function _overrideWithHigherProof(
  TaikoData.State storage _state,
  IAddressResolver _resolver,
- TaikoData.Block storage _blk,
+ TaikoData.BlockV2 storage _blk,
  TaikoData.TransitionState memory _ts,
  TaikoData.Transition memory _tran,
  TaikoData.TierProof memory _proof,

packages/protocol/contracts/L1/libs/LibUtils.sol

@@ -64,7 +64,7 @@ library LibUtils {
  _state.slotB.numBlocks = 1;
 
  // Init the genesis block
- TaikoData.Block storage blk = _state.blocks[0];
+ TaikoData.BlockV2 storage blk = _state.blocks[0];
  blk.nextTransitionId = 2;
  blk.proposedAt = uint64(block.timestamp);
  blk.verifiedTransitionId = 1;
@@ -107,7 +107,7 @@ library LibUtils {
  )
  internal
  view
- returns (TaikoData.Block storage blk_, uint64 slot_)
+ returns (TaikoData.BlockV2 storage blk_, uint64 slot_)
  {
  slot_ = _blockId % _config.blockRingBufferSize;
  blk_ = _state.blocks[slot_];
@@ -129,7 +129,7 @@ library LibUtils {
  view
  returns (bytes32 blockHash_, bytes32 stateRoot_, uint64 verifiedAt_)
  {
- (TaikoData.Block storage blk, uint64 slot) = getBlock(_state, _config, _blockId);
+ (TaikoData.BlockV2 storage blk, uint64 slot) = getBlock(_state, _config, _blockId);
 
  if (blk.verifiedTransitionId != 0) {
  TaikoData.TransitionState storage transition =
@@ -158,7 +158,7 @@ library LibUtils {
  view
  returns (TaikoData.TransitionState storage)
  {
- (TaikoData.Block storage blk, uint64 slot) = getBlock(_state, _config, _blockId);
+ (TaikoData.BlockV2 storage blk, uint64 slot) = getBlock(_state, _config, _blockId);
 
  if (_tid == 0 || _tid >= blk.nextTransitionId) revert L1_TRANSITION_NOT_FOUND();
  return _state.transitions[slot][_tid];
@@ -181,7 +181,7 @@ library LibUtils {
  view
  returns (TaikoData.TransitionState storage)
  {
- (TaikoData.Block storage blk, uint64 slot) = getBlock(_state, _config, _blockId);
+ (TaikoData.BlockV2 storage blk, uint64 slot) = getBlock(_state, _config, _blockId);
 
  uint24 tid = getTransitionId(_state, blk, slot, _parentHash);
  if (tid == 0) revert L1_TRANSITION_NOT_FOUND();
@@ -193,7 +193,7 @@ library LibUtils {
  /// This function will return 0 if the transition is not found.
  function getTransitionId(
  TaikoData.State storage _state,
- TaikoData.Block storage _blk,
+ TaikoData.BlockV2 storage _blk,
  uint64 _slot,
  bytes32 _parentHash
  )

packages/protocol/contracts/L1/libs/LibVerifying.sol

@@ -51,7 +51,7 @@ library LibVerifying {
  local.blockId = local.b.lastVerifiedBlockId;
  local.slot = local.blockId % _config.blockRingBufferSize;
 
- TaikoData.Block storage blk = _state.blocks[local.slot];
+ TaikoData.BlockV2 storage blk = _state.blocks[local.slot];
  if (blk.blockId != local.blockId) revert L1_BLOCK_MISMATCH();
 
  local.lastVerifiedTransitionId = blk.verifiedTransitionId;
@@ -197,7 +197,7 @@ library LibVerifying {
  view
  returns (address)
  {
- (TaikoData.Block storage blk,) = LibUtils.getBlock(_state, _config, _blockId);
+ (TaikoData.BlockV2 storage blk,) = LibUtils.getBlock(_state, _config, _blockId);
 
  uint24 tid = blk.verifiedTransitionId;
  if (tid == 0) return address(0);