Merge pull request #6352 from ethereum-optimism/refcell/resolve-tx

feat(op-challenger): Responder Resolve Function

op-challenger/fault/responder.go

@@ -55,6 +55,11 @@ func (r *faultResponder) buildFaultAttackData(parentContractIndex int, pivot [32
 	)
 }
 
+// buildResolveData creates the transaction data for the Resolve function.
+func (r *faultResponder) buildResolveData() ([]byte, error) {
+	return r.fdgAbi.Pack("resolve")
+}
+
 // BuildTx builds the transaction for the [faultResponder].
 func (r *faultResponder) BuildTx(ctx context.Context, response Claim) ([]byte, error) {
 	if response.DefendsParent() {
@@ -72,6 +77,16 @@ func (r *faultResponder) BuildTx(ctx context.Context, response Claim) ([]byte, e
 	}
 }
 
+// Resolve executes a resolve transaction to resolve a fault dispute game.
+func (r *faultResponder) Resolve(ctx context.Context) error {
+	txData, err := r.buildResolveData()
+	if err != nil {
+		return err
+	}
+
+	return r.sendTxAndWait(ctx, txData)
+}
+
 // Respond takes a [Claim] and executes the response action.
 func (r *faultResponder) Respond(ctx context.Context, response Claim) error {
 	txData, err := r.BuildTx(ctx, response)

op-challenger/fault/responder_test.go

@@ -57,6 +57,24 @@ func newTestFaultResponder(t *testing.T, sendFails bool) (*faultResponder, *mock
 	return responder, mockTxMgr
 }
 
+// TestResponder_Resolve_SendFails tests the [Responder.Resolve] method
+// bubbles up the error returned by the [txmgr.Send] method.
+func TestResponder_Resolve_SendFails(t *testing.T) {
+	responder, mockTxMgr := newTestFaultResponder(t, true)
+	err := responder.Resolve(context.Background())
+	require.ErrorIs(t, err, mockSendError)
+	require.Equal(t, 0, mockTxMgr.sends)
+}
+
+// TestResponder_Resolve_Success tests the [Responder.Resolve] method
+// succeeds when the tx candidate is successfully sent through the txmgr.
+func TestResponder_Resolve_Success(t *testing.T) {
+	responder, mockTxMgr := newTestFaultResponder(t, false)
+	err := responder.Resolve(context.Background())
+	require.NoError(t, err)
+	require.Equal(t, 1, mockTxMgr.sends)
+}
+
 // TestResponder_Respond_SendFails tests the [Responder.Respond] method
 // bubbles up the error returned by the [txmgr.Send] method.
 func TestResponder_Respond_SendFails(t *testing.T) {