fix: checks address proposer

solidity/contracts/modules/dispute/BondedDisputeModule.sol

@@ -48,7 +48,7 @@ contract BondedDisputeModule is Module, IBondedDisputeModule {
   function onDisputeStatusChange(
     bytes32 _disputeId,
     IOracle.Request calldata _request,
-    IOracle.Response calldata, /* _response */
+    IOracle.Response calldata _response, /* _response */
     IOracle.Dispute calldata _dispute
   ) external onlyOracle {
     RequestParameters memory _params = decodeRequestData(_request.disputeModuleData);
@@ -70,6 +70,7 @@ contract BondedDisputeModule is Module, IBondedDisputeModule {
         _amount: _params.bondSize
       });
     } else if (_status == IOracle.DisputeStatus.Won) {
+      if (_dispute.proposer != _response.proposer) revert BondedDisputeModule_SelfDispute();
       // Disputer won, we pay the disputer and release their bond
       _params.accountingExtension.pay({
         _requestId: _dispute.requestId,

solidity/interfaces/modules/dispute/IBondedDisputeModule.sol

@@ -15,6 +15,14 @@ import {IAccountingExtension} from '../../extensions/IAccountingExtension.sol';
   * the tokens are either returned to the disputer or to the proposer.
   */
 interface IBondedDisputeModule is IDisputeModule {
+  /*///////////////////////////////////////////////////////////////
+                              ERRORS
+  //////////////////////////////////////////////////////////////*/
+
+  /**
+   * @notice Thrown when the response proposer tries to dispute the response
+   */
+  error BondedDisputeModule_SelfDispute();
   /*///////////////////////////////////////////////////////////////
                               STRUCTS
   //////////////////////////////////////////////////////////////*/

solidity/test/unit/modules/dispute/BondedDisputeModule.t.sol

@@ -220,6 +220,32 @@ contract BondedDisputeModule_Unit_OnDisputeStatusChange is BaseTest {
     }
   }
 
+  /**
+   * @notice Test if onDisputeStatusChange reverts when the dispute is self-disputed
+   */
+  function test_revertIfSelfDispute(uint256 _bondSize, IERC20 _token) public {
+    mockRequest.disputeModuleData =
+      abi.encode(IBondedDisputeModule.RequestParameters(accountingExtension, _token, _bondSize));
+    bytes32 _requestId = _getId(mockRequest);
+    mockDispute.requestId = _requestId;
+    bytes32 _disputeId = _getId(mockDispute);
+
+    // Mock and expect IOracle.disputeStatus to be called
+    _mockAndExpect(
+      address(oracle), abi.encodeCall(oracle.disputeStatus, (_disputeId)), abi.encode(IOracle.DisputeStatus.Won)
+    );
+
+    // Change the proposer to the disputer
+    mockDispute.proposer = makeAddr('newProposer');
+
+    // Check: revert if self-dispute
+    vm.expectRevert(IBondedDisputeModule.BondedDisputeModule_SelfDispute.selector);
+
+    // Test: call disputeResponse with self-dispute
+    vm.prank(address(oracle));
+    bondedDisputeModule.onDisputeStatusChange(_disputeId, mockRequest, mockResponse, mockDispute);
+  }
+
   /**
    * @notice Test if onDisputeStatusChange reverts when called by caller who's not the oracle
    */