WIP

Signed-off-by: Chris Maree <[email protected]>

Author: chrismaree

test/evm/foundry/local/SpokePoolDeprecatedMethods.t.sol

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+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity ^0.8.0;
+
+import { Test } from "forge-std/Test.sol";
+import { MockSpokePool } from "../../../../contracts/test/MockSpokePool.sol";
+import { WETH9 } from "../../../../contracts/external/WETH9.sol";
+import { AddressToBytes32 } from "../../../../contracts/libraries/AddressConverters.sol";
+import { ERC1967Proxy } from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
+
+// Deprecated interface used to show that we can still call deposit() on the spoke, which should route internally to the
+// colliding function interface selector on depositDeprecated_5947912356 enabling legacy deposits to still work without
+// breaking interface changes.
+interface DeprecatedSpokePoolInterface {
+    function deposit(
+        address recipient,
+        address originToken,
+        uint256 amount,
+        uint256 destinationChainId,
+        int64 relayerFeePct,
+        uint32 quoteTimestamp,
+        bytes memory message,
+        uint256
+    ) external payable;
+}
+
+contract SpokePoolOverloadedDeprecatedMethodsTest is Test {
+    using AddressToBytes32 for address;
+
+    MockSpokePool spokePool;
+    WETH9 mockWETH;
+
+    address depositor;
+    address owner;
+
+    uint256 destinationChainId = 10;
+    uint256 depositAmount = 0.5 * (10**18);
+
+    function setUp() public {
+        mockWETH = new WETH9();
+
+        depositor = vm.addr(1);
+        owner = vm.addr(2);
+
+        vm.startPrank(owner);
+        ERC1967Proxy proxy = new ERC1967Proxy(
+            address(new MockSpokePool(address(mockWETH))),
+            abi.encodeCall(MockSpokePool.initialize, (0, owner, address(420)))
+        );
+        spokePool = MockSpokePool(payable(proxy));
+
+        spokePool.setEnableRoute(address(mockWETH), destinationChainId, true);
+
+        vm.stopPrank();
+
+        deal(depositor, depositAmount * 2);
+
+        vm.startPrank(depositor);
+        mockWETH.deposit{ value: depositAmount }();
+        mockWETH.approve(address(spokePool), depositAmount);
+        vm.stopPrank();
+    }
+
+    function testDeprecatedDeposit() public {
+        // Here, we are calling the deprecated deposit method, as defined in the deprecated interface. This should, in
+        // theory, collide with the function selector depositDeprecated_5947912356, thereby calling the legacy deposit
+        // method on the spoke pool, while using the old old deposit function signature.
+        vm.startPrank(depositor);
+        DeprecatedSpokePoolInterface(address(spokePool)).deposit(
+            depositor, // recipient
+            address(mockWETH), // originToken
+            depositAmount, // amount
+            destinationChainId, // destinationChainId
+            0, // relayerFeePct
+            uint32(block.timestamp), // quoteTimestamp
+            bytes(""), // message
+            0 // maxCount
+        );
+
+        // Test depositing native ETH directly
+        DeprecatedSpokePoolInterface(address(spokePool)).deposit{ value: depositAmount }(
+            depositor, // recipient
+            address(mockWETH), // originToken - still WETH address for native deposits
+            depositAmount, // amount
+            destinationChainId, // destinationChainId
+            0, // relayerFeePct
+            uint32(block.timestamp), // quoteTimestamp
+            bytes(""), // message
+            0 // maxCount
+        );
+        vm.stopPrank();
+    }
+
+    function testBytes32Deposit() public {
+        vm.prank(depositor);
+        // Show the bytes32 variant of the new deposit method works.
+        spokePool.deposit(
+            address(depositor).toBytes32(), // depositor
+            address(depositor).toBytes32(), // recipient
+            address(mockWETH).toBytes32(), // inputToken
+            address(mockWETH).toBytes32(), // outputToken
+            depositAmount, // inputAmount
+            0, // outputAmount
+            destinationChainId, // destinationChainId
+            bytes32(0), // exclusiveRelayer
+            uint32(block.timestamp), // quoteTimestamp
+            uint32(block.timestamp + 1 hours), // fillDeadline
+            0, // exclusivityParameter
+            bytes("") // message
+        );
+    }
+
+    function testAddressDeposit() public {
+        // Show the address variant of the new deposit method works.
+        vm.prank(depositor);
+        spokePool.depositV3(
+            depositor, // depositor
+            depositor, // recipient
+            address(mockWETH), // inputToken
+            address(mockWETH), // outputToken
+            depositAmount, // inputAmount
+            0, // outputAmount
+            destinationChainId, // destinationChainId
+            address(0), // exclusiveRelayer
+            uint32(block.timestamp), // quoteTimestamp
+            uint32(block.timestamp + 1 hours), // fillDeadline
+            0, // exclusivityParameter
+            bytes("") // message
+        );
+    }
+}