test: gas benchmark for relay with arbitrary call

packages/contracts-rfq/test/FastBridgeV2.GasBench.Dst.ArbitraryCall.t.sol

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import {FastBridgeV2GasBenchmarkDstTest} from "./FastBridgeV2.GasBench.Dst.t.sol";
+import {RecipientMock} from "./mocks/RecipientMock.sol";
+
+// solhint-disable func-name-mixedcase, ordering
+contract FastBridgeV2GasBenchmarkDstArbitraryCallTest is FastBridgeV2GasBenchmarkDstTest {
+    // To get an idea about how much overhead the arbitrary call adds to the relaying process, we use a mock
+    // recipient that has the hook function implemented as a no-op.
+    // The mocked callParams are chosen to be similar to the real use cases:
+    // - user address
+    // - some kind of ID to decide what to do with the tokens next
+
+    function setUp() public virtual override {
+        // In the inherited tests userB is always used as the recipient of the tokens.
+        userB = address(new RecipientMock());
+        vm.label(userB, "ContractRecipient");
+        super.setUp();
+    }
+
+    function createFixturesV2() public virtual override {
+        super.createFixturesV2();
+        bytes memory mockCallParams = abi.encode(userA, keccak256("Random ID"));
+        setTokenTestCallParams(mockCallParams);
+        setEthTestCallParams(mockCallParams);
+    }
+}

packages/contracts-rfq/test/FastBridgeV2.GasBench.Dst.Excl.t.sol

@@ -13,6 +13,7 @@ contract FastBridgeV2GasBenchmarkDstExclusivityTest is FastBridgeV2GasBenchmarkD
     }
 
     function createFixturesV2() public virtual override {
+        super.createFixturesV2();
         setTokenTestExclusivityParams(relayerA, EXCLUSIVITY_PERIOD);
         setEthTestExclusivityParams(relayerA, EXCLUSIVITY_PERIOD);
     }

packages/contracts-rfq/test/FastBridgeV2.GasBench.Encoding.t.sol

@@ -5,8 +5,6 @@ import {FastBridgeV2SrcBaseTest} from "./FastBridgeV2.Src.Base.t.sol";
 
 // solhint-disable func-name-mixedcase, ordering
 contract FastBridgeV2GasBenchmarkEncodingTest is FastBridgeV2SrcBaseTest {
-    // TODO: add more tests with variable length requests once arbitrary call is done
-
     function test_getBridgeTransaction() public view {
         bytes memory request = abi.encode(extractV1(tokenTx));
         fastBridge.getBridgeTransaction(request);
@@ -16,4 +14,9 @@ contract FastBridgeV2GasBenchmarkEncodingTest is FastBridgeV2SrcBaseTest {
         bytes memory request = abi.encode(tokenTx);
         fastBridge.getBridgeTransactionV2(request);
     }
+
+    function test_getBridgeTransactionV2_withArbitraryCall() public {
+        setTokenTestCallParams({callParams: abi.encode(userA, keccak256("Random ID"))});
+        test_getBridgeTransactionV2();
+    }
 }