diff --git a/solidity/contracts/utils/Typehash.sol b/solidity/contracts/utils/Typehash.sol
new file mode 100644
index 00000000..6a68c94c
--- /dev/null
+++ b/solidity/contracts/utils/Typehash.sol
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+bytes32 constant _PLEDGE_FOR_DISPUTE_TYPEHASH = keccak256(
+  'pledgeForDispute(IOracle.Request _request, IOracle.Dispute _dispute,IAccessController.AccessControl _accessControl)'
+);
+
+bytes32 constant _PLEDGE_AGAINST_DISPUTE_TYPEHASH = keccak256(
+  'pledgeAgainstDispute(IOracle.Request _request, IOracle.Dispute _dispute,IAccessController.AccessControl _accessControl)'
+);
+
+bytes32 constant _CLAIM_VOTE_TYPEHASH = keccak256('');
+bytes32 constant _CLAIM_PLEDGE_TYPEHASH = keccak256('');
+
+bytes32 constant _RELEASE_UNUTILIZED_RESPONSE_TYPEHASH = keccak256('');
+bytes32 constant _CAST_VOTE_TYPEHASH = keccak256('');
+bytes32 constant _COMMIT_VOTE_TYPEHASH = keccak256('');
+bytes32 constant _REVEAL_VOTE_TYPEHASH = keccak256('');