feat: add hashProposalWithModule function

packages/contracts-bedrock/snapshots/semver-lock.json

@@ -177,7 +177,7 @@
   },
   "src/governance/ProposalValidator.sol:ProposalValidator": {
     "initCodeHash": "0x44d71e84d08aeb7abc82993a0293f646952d83e439e95427d2c432568f95524e",
-    "sourceCodeHash": "0xd7d94a765bec0d80cac4bce4e62270a27a830b103dd554d7a4be540a49f8f4d5"
+    "sourceCodeHash": "0xc4c4954f4b59c6c0bf0acfc3ac6616866fb3d246bab6e295ee9b113ac903860d"
   },
   "src/legacy/DeployerWhitelist.sol:DeployerWhitelist": {
     "initCodeHash": "0x53099379ed48b87f027d55712dbdd1da7d7099925426eb0531da9c0012e02c29",

packages/contracts-bedrock/src/governance/ProposalValidator.sol

@@ -66,7 +66,8 @@ contract ProposalValidator is OwnableUpgradeable, ReinitializableBase, ISemver {
     }
 
     /// @notice Struct for storing explicit data for each proposal type.
-    /// @param requiredApprovals The number of approvals each proposal type requires in order to be able to move for voting.
+    /// @param requiredApprovals The number of approvals each proposal type requires in order to be able to move for
+    /// voting.
     /// @param proposalTypeConfigurator The voting module each proposal type must use.
     struct ProposalTypeData {
         uint256 requiredApprovals;
@@ -466,6 +467,23 @@ contract ProposalValidator is OwnableUpgradeable, ReinitializableBase, ISemver {
         return keccak256(abi.encode(_targets, _values, _calldatas, _description));
     }
 
+    /// @notice Calculate `proposalId` hashing similarly to `hashProposal` but based on `module` and `proposalData`.
+    /// @param _module The address of the voting module to use for this proposal.
+    /// @param _proposalData The proposal data to pass to the voting module.
+    /// @param _descriptionHash The hash of the proposal description.
+    /// @return The hash of the proposal.
+    function _hashProposalWithModule(
+        address _module,
+        bytes memory _proposalData,
+        bytes32 _descriptionHash
+    )
+        internal
+        view
+        returns (bytes32)
+    {
+        return keccak256(abi.encode(address(this), _module, _proposalData, _descriptionHash));
+    }
+
     /// @notice Private function to set the minimum voting power and emit event.
     /// @param _minimumVotingPower The new minimum voting power threshold.
     function _setMinimumVotingPower(uint256 _minimumVotingPower) private {