Added events to the fraud verifier (#188)

packages/contracts/contracts/optimistic-ethereum/OVM/verification/OVM_FraudVerifier.sol

@@ -125,6 +125,13 @@ contract OVM_FraudVerifier is Lib_AddressResolver, OVM_FraudContributor, iOVM_Fr
         );
 
         _deployTransitioner(_preStateRoot, _txHash, _preStateRootProof.index);
+
+        emit FraudProofInitialized(
+            _preStateRoot,
+            _preStateRootProof.index,
+            _txHash,
+            msg.sender
+        );
     }
 
     /**
@@ -192,6 +199,13 @@ contract OVM_FraudVerifier is Lib_AddressResolver, OVM_FraudContributor, iOVM_Fr
 
         // TEMPORARY: Remove the transitioner; for minnet.
         transitioners[keccak256(abi.encodePacked(_preStateRoot, _txHash))] = iOVM_StateTransitioner(0x0000000000000000000000000000000000000000);
+
+        emit FraudProofFinalized(
+            _preStateRoot,
+            _preStateRootProof.index,
+            _txHash,
+            msg.sender
+        );
     }
 
 

packages/contracts/contracts/optimistic-ethereum/iOVM/verification/iOVM_FraudVerifier.sol

@@ -13,6 +13,25 @@ import { iOVM_StateTransitioner } from "./iOVM_StateTransitioner.sol";
  */
 interface iOVM_FraudVerifier {
 
+    /**********
+     * Events *
+     **********/
+
+    event FraudProofInitialized(
+        bytes32 _preStateRoot,
+        uint256 _preStateRootIndex,
+        bytes32 _transactionHash,
+        address _who
+    );
+
+    event FraudProofFinalized(
+        bytes32 _preStateRoot,
+        uint256 _preStateRootIndex,
+        bytes32 _transactionHash,
+        address _who
+    );
+
+
     /***************************************
      * Public Functions: Transition Status *
      ***************************************/