fix: interface compatibility with non-standard ERC20s (#71)

.gas-snapshot

@@ -1,37 +1,37 @@
-OrderOriginPermit2Test:test_fillPermit2() (gas: 225289)
-OrderOriginPermit2Test:test_fillPermit2_multi() (gas: 1019134)
-OrderOriginPermit2Test:test_initiatePermit2() (gas: 235774)
-OrderOriginPermit2Test:test_initiatePermit2_multi() (gas: 992096)
-OrdersTest:test_fill_ERC20() (gas: 70559)
-OrdersTest:test_fill_ETH() (gas: 68520)
-OrdersTest:test_fill_both() (gas: 166795)
-OrdersTest:test_fill_multiETH() (gas: 132141)
+OrderOriginPermit2Test:test_fillPermit2() (gas: 225275)
+OrderOriginPermit2Test:test_fillPermit2_multi() (gas: 1019098)
+OrderOriginPermit2Test:test_initiatePermit2() (gas: 235756)
+OrderOriginPermit2Test:test_initiatePermit2_multi() (gas: 992082)
+OrdersTest:test_fill_ERC20() (gas: 71615)
+OrdersTest:test_fill_ETH() (gas: 68524)
+OrdersTest:test_fill_both() (gas: 167851)
+OrdersTest:test_fill_multiETH() (gas: 132145)
 OrdersTest:test_fill_underflowETH() (gas: 115425)
-OrdersTest:test_initiate_ERC20() (gas: 81636)
+OrdersTest:test_initiate_ERC20() (gas: 82688)
 OrdersTest:test_initiate_ETH() (gas: 45150)
-OrdersTest:test_initiate_both() (gas: 118911)
-OrdersTest:test_initiate_multiERC20() (gas: 722642)
+OrdersTest:test_initiate_both() (gas: 119963)
+OrdersTest:test_initiate_multiERC20() (gas: 724742)
 OrdersTest:test_initiate_multiETH() (gas: 75538)
 OrdersTest:test_orderExpired() (gas: 28106)
-OrdersTest:test_sweepERC20() (gas: 59721)
+OrdersTest:test_sweepERC20() (gas: 60713)
 OrdersTest:test_sweepETH() (gas: 82348)
 OrdersTest:test_underflowETH() (gas: 63690)
-PassagePermit2Test:test_disallowedEnterPermit2() (gas: 699630)
-PassagePermit2Test:test_enterTokenPermit2() (gas: 145449)
-PassageTest:test_configureEnter() (gas: 125771)
-PassageTest:test_disallowedEnter() (gas: 56619)
+PassagePermit2Test:test_disallowedEnterPermit2() (gas: 696817)
+PassagePermit2Test:test_enterTokenPermit2() (gas: 145435)
+PassageTest:test_configureEnter() (gas: 128989)
+PassageTest:test_disallowedEnter() (gas: 57692)
 PassageTest:test_enter() (gas: 25519)
-PassageTest:test_enterToken() (gas: 64397)
-PassageTest:test_enterToken_defaultChain() (gas: 62979)
+PassageTest:test_enterToken() (gas: 65469)
+PassageTest:test_enterToken_defaultChain() (gas: 64051)
 PassageTest:test_enter_defaultChain() (gas: 24055)
 PassageTest:test_fallback() (gas: 21533)
 PassageTest:test_onlyTokenAdmin() (gas: 16881)
 PassageTest:test_receive() (gas: 21383)
 PassageTest:test_setUp() (gas: 17011)
-PassageTest:test_withdraw() (gas: 59188)
-RollupPassagePermit2Test:test_exitTokenPermit2() (gas: 129402)
+PassageTest:test_withdraw() (gas: 60183)
+RollupPassagePermit2Test:test_exitTokenPermit2() (gas: 129388)
 RollupPassageTest:test_exit() (gas: 22403)
-RollupPassageTest:test_exitToken() (gas: 50232)
+RollupPassageTest:test_exitToken() (gas: 51071)
 RollupPassageTest:test_fallback() (gas: 19949)
 RollupPassageTest:test_receive() (gas: 19844)
 TransactTest:test_configureGas() (gas: 22828)

src/orders/OrderDestination.sol

@@ -4,9 +4,12 @@ pragma solidity ^0.8.24;
 import {OrdersPermit2} from "./OrdersPermit2.sol";
 import {IOrders} from "./IOrders.sol";
 import {IERC20} from "openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
+import {SafeERC20} from "openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
 
 /// @notice Contract capable of processing fulfillment of intent-based Orders.
 abstract contract OrderDestination is IOrders, OrdersPermit2 {
+    using SafeERC20 for IERC20;
+
     /// @notice Emitted when Order Outputs are sent to their recipients.
     /// @dev NOTE that here, Output.chainId denotes the *origin* chainId.
     event Filled(Output[] outputs);
@@ -53,7 +56,7 @@ abstract contract OrderDestination is IOrders, OrdersPermit2 {
                 value -= outputs[i].amount;
                 payable(outputs[i].recipient).transfer(outputs[i].amount);
             } else {
-                IERC20(outputs[i].token).transferFrom(msg.sender, outputs[i].recipient, outputs[i].amount);
+                IERC20(outputs[i].token).safeTransferFrom(msg.sender, outputs[i].recipient, outputs[i].amount);
             }
         }
     }

src/orders/OrderOrigin.sol

@@ -4,9 +4,12 @@ pragma solidity ^0.8.24;
 import {OrdersPermit2} from "./OrdersPermit2.sol";
 import {IOrders} from "./IOrders.sol";
 import {IERC20} from "openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
+import {SafeERC20} from "openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
 
 /// @notice Contract capable of registering initiation of intent-based Orders.
 abstract contract OrderOrigin is IOrders, OrdersPermit2 {
+    using SafeERC20 for IERC20;
+
     /// @notice Thrown when an Order is submitted with a deadline that has passed.
     error OrderExpired();
 
@@ -79,7 +82,7 @@ abstract contract OrderOrigin is IOrders, OrdersPermit2 {
         if (token == address(0)) {
             payable(recipient).transfer(amount);
         } else {
-            IERC20(token).transfer(recipient, amount);
+            IERC20(token).safeTransfer(recipient, amount);
         }
         emit Sweep(recipient, token, amount);
     }
@@ -92,7 +95,7 @@ abstract contract OrderOrigin is IOrders, OrdersPermit2 {
                 // this line should underflow if there's an attempt to spend more ETH than is attached to the transaction
                 value -= inputs[i].amount;
             } else {
-                IERC20(inputs[i].token).transferFrom(msg.sender, address(this), inputs[i].amount);
+                IERC20(inputs[i].token).safeTransferFrom(msg.sender, address(this), inputs[i].amount);
             }
         }
     }

src/passage/Passage.sol

@@ -4,9 +4,12 @@ pragma solidity ^0.8.24;
 import {PassagePermit2} from "./PassagePermit2.sol";
 import {UsesPermit2} from "../UsesPermit2.sol";
 import {IERC20} from "openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
+import {SafeERC20} from "openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
 
 /// @notice A contract deployed to Host chain that allows tokens to enter the rollup.
 contract Passage is PassagePermit2 {
+    using SafeERC20 for IERC20;
+
     /// @notice The chainId of rollup that Ether will be sent to by default when entering the rollup via fallback() or receive().
     uint256 public immutable defaultRollupChainId;
 
@@ -90,7 +93,7 @@ contract Passage is PassagePermit2 {
     /// @param amount - The amount of tokens entering the rollup.
     function enterToken(uint256 rollupChainId, address rollupRecipient, address token, uint256 amount) public {
         // transfer tokens to this contract
-        IERC20(token).transferFrom(msg.sender, address(this), amount);
+        IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
         // check and emit
         _enterToken(rollupChainId, rollupRecipient, token, amount);
     }
@@ -127,7 +130,7 @@ contract Passage is PassagePermit2 {
         if (token == address(0)) {
             payable(recipient).transfer(amount);
         } else {
-            IERC20(token).transfer(recipient, amount);
+            IERC20(token).safeTransfer(recipient, amount);
         }
         emit Withdrawal(token, recipient, amount);
     }

src/passage/RollupPassage.sol

@@ -4,10 +4,13 @@ pragma solidity ^0.8.24;
 import {PassagePermit2} from "./PassagePermit2.sol";
 import {UsesPermit2} from "../UsesPermit2.sol";
 import {IERC20} from "openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
+import {SafeERC20} from "openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
 import {ERC20Burnable} from "openzeppelin-contracts/contracts/token/ERC20/extensions/ERC20Burnable.sol";
 
 /// @notice Enables tokens to Exit the rollup.
 contract RollupPassage is PassagePermit2 {
+    using SafeERC20 for IERC20;
+
     /// @notice Emitted when native Ether exits the rollup.
     /// @param hostRecipient - The *requested* recipient of tokens on the host chain.
     /// @param amount - The amount of Ether exiting the rollup.
@@ -46,7 +49,7 @@ contract RollupPassage is PassagePermit2 {
     /// @custom:emits ExitToken
     function exitToken(address hostRecipient, address token, uint256 amount) external {
         // transfer tokens to this contract
-        IERC20(token).transferFrom(msg.sender, address(this), amount);
+        IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
         // burn and emit
         _exitToken(hostRecipient, token, amount);
     }