feat(protocol): allow L2 contracts to read L2's parent block timestamp (

#16425)
taikoxyz · Mar 13, 2024 · 9b79359 · 9b79359
1 parent fc9f19f
commit 9b79359
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/packages/protocol/contracts/L2/TaikoL2.sol b/packages/protocol/contracts/L2/TaikoL2.sol
@@ -49,6 +49,12 @@ contract TaikoL2 is CrossChainOwned {
     /// @notice The last synced L1 block height.
     uint64 public lastSyncedBlock;
 
+    /// @notice The parent block's timestamp.
+    uint64 public parentTimestamp;
+
+    /// @notice The current block's timestamp.
+    uint64 private __currentBlockTimestamp;
+
     uint256[47] private __gap;
 
     /// @notice Emitted when the latest L1 block details are anchored to L2.
@@ -95,6 +101,7 @@ contract TaikoL2 is CrossChainOwned {
 
         gasExcess = _gasExcess;
         (publicInputHash,) = _calcPublicInputHash(block.number);
+        __currentBlockTimestamp = uint64(block.timestamp);
     }
 
     /// @notice Anchors the latest L1 block details to L2 for cross-layer
@@ -154,6 +161,9 @@ contract TaikoL2 is CrossChainOwned {
         l2Hashes[parentId] = blockhash(parentId);
         publicInputHash = publicInputHashNew;
 
+        parentTimestamp = __currentBlockTimestamp;
+        __currentBlockTimestamp = uint64(block.timestamp);
+
         emit Anchored(blockhash(parentId), gasExcess);
     }