fix(protocol): new way to calculate meta.difficulty (TKO-11) (#15568)

taikoxyz · Jan 26, 2024 · 8c4b48e · 8c4b48e
1 parent b0ca0df
commit 8c4b48e
Showing 1 changed file with 1 addition and 3 deletions.
diff --git a/packages/protocol/contracts/L1/libs/LibProposing.sol b/packages/protocol/contracts/L1/libs/LibProposing.sol
@@ -193,9 +193,7 @@ library LibProposing {
         // of multiple Taiko blocks being proposed within a single
         // Ethereum block, we must introduce a salt to this random
         // number as the L2 mixHash.
-        unchecked {
-            meta.difficulty = meta.blobHash ^ bytes32(block.prevrandao * b.numBlocks * block.number);
-        }
+        meta.difficulty = keccak256(abi.encodePacked(block.prevrandao, b.numBlocks, block.number));
 
         // Use the difficulty as a random number
         meta.minTier = ITierProvider(resolver.resolve("tier_provider", false)).getMinTier(