adding comments on hashing

smartcontractkit · Sep 19, 2023 · 4dad36f · 4dad36f
1 parent 48fa9f8
commit 4dad36f
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/contracts/src/v0.8/ccip/libraries/Internal.sol b/contracts/src/v0.8/ccip/libraries/Internal.sol
@@ -84,6 +84,8 @@ library Internal {
   bytes32 internal constant EVM_2_EVM_MESSAGE_HASH = keccak256("EVM2EVMMessageHash");
 
   function _hash(EVM2EVMMessage memory original, bytes32 metadataHash) internal pure returns (bytes32) {
+    // Fixed-size message fields are included in nested hash to reduce stack pressure.
+    // This hashing scheme is also used by RMN. If changing it, please notify RMN.
     return
       keccak256(
         abi.encode(