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Contract

0x3b17F4c26A80a3BfcEC1CC0d03615ba02A104556

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Transaction Hash
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Block
From
To
Transfer*172015182024-10-30 0:01:39147 days ago1730246499IN
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0 ETH0.000051380.10775
Transfer*171114582024-10-26 10:21:47151 days ago1729938107IN
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0 ETH0.000041280.074
Transfer*170594162024-10-24 9:05:42153 days ago1729760742IN
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0 ETH0.000152770.19375
Transfer*170348062024-10-23 10:04:02154 days ago1729677842IN
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0 ETH0.00004990.09725
Transfer*170337222024-10-23 9:02:45154 days ago1729674165IN
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0 ETH0.000083630.16625
Transfer*170322202024-10-23 7:36:44154 days ago1729669004IN
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0 ETH0.000106290.121875
Transfer*170274212024-10-23 3:09:01154 days ago1729652941IN
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0 ETH0.000050860.098375
Transfer*170211282024-10-22 21:18:20155 days ago1729631900IN
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0 ETH0.000077080.15125
Transfer*170204732024-10-22 20:42:12155 days ago1729629732IN
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0 ETH0.000013420.16875
Transfer*170194502024-10-22 19:45:47155 days ago1729626347IN
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0 ETH0.000093020.1825
Transfer*170185342024-10-22 18:55:20155 days ago1729623320IN
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0 ETH0.000082830.1625
Transfer*170182842024-10-22 18:41:21155 days ago1729622481IN
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0 ETH0.000094970.18625
Transfer*170143712024-10-22 14:57:55155 days ago1729609075IN
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0 ETH0.000338130.2425
Transfer*170135012024-10-22 14:08:15155 days ago1729606095IN
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Transfer*170087602024-10-22 9:38:44155 days ago1729589924IN
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0 ETH0.000090030.17375
Transfer*170066632024-10-22 7:34:27155 days ago1729582467IN
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0 ETH0.000061770.10675
Transfer*169992002024-10-22 0:31:14155 days ago1729557074IN
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0 ETH0.000052840.11275
Transfer*169988862024-10-22 0:12:39155 days ago1729555959IN
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0 ETH0.000049860.098125
Transfer*169881752024-10-21 14:05:32156 days ago1729519532IN
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0 ETH0.000151360.30125
Transfer*169868242024-10-21 12:46:02156 days ago1729514762IN
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Transfer*169867872024-10-21 12:43:50156 days ago1729514630IN
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0 ETH0.000163890.15
Transfer*169865142024-10-21 12:27:18156 days ago1729513638IN
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0 ETH0.000070890.1375
Transfer*169864522024-10-21 12:23:42156 days ago1729513422IN
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0 ETH0.000075080.1475
Transfer*169863812024-10-21 12:19:38156 days ago1729513178IN
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0 ETH0.000070560.14125
Transfer*169797652024-10-21 6:00:56156 days ago1729490456IN
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0 ETH0.000079890.15125

Latest 25 internal transactions (View All)

Parent Transaction Hash Block From To
170348062024-10-23 10:04:02154 days ago1729677842
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1 wei
170348062024-10-23 10:04:02154 days ago1729677842
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0.00197605 ETH
170348062024-10-23 10:04:02154 days ago1729677842
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0.00002666 ETH
170348062024-10-23 10:04:02154 days ago1729677842
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0.00200271 ETH
170337222024-10-23 9:02:45154 days ago1729674165
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1 wei
170337222024-10-23 9:02:45154 days ago1729674165
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0.00073205 ETH
170337222024-10-23 9:02:45154 days ago1729674165
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0.0000446 ETH
170337222024-10-23 9:02:45154 days ago1729674165
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0.00077666 ETH
170322202024-10-23 7:36:44154 days ago1729669004
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1 wei
170322202024-10-23 7:36:44154 days ago1729669004
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0.69671655 ETH
170322202024-10-23 7:36:44154 days ago1729669004
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0.0000479 ETH
170322202024-10-23 7:36:44154 days ago1729669004
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0.69676445 ETH
170274212024-10-23 3:09:01154 days ago1729652941
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1 wei
170274212024-10-23 3:09:01154 days ago1729652941
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0.06170409 ETH
170274212024-10-23 3:09:01154 days ago1729652941
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170274212024-10-23 3:09:01154 days ago1729652941
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0.0617287 ETH
170211282024-10-22 21:18:20155 days ago1729631900
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1 wei
170211282024-10-22 21:18:20155 days ago1729631900
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0.00379091 ETH
170211282024-10-22 21:18:20155 days ago1729631900
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0.00004393 ETH
170211282024-10-22 21:18:20155 days ago1729631900
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0.00383484 ETH
170194502024-10-22 19:45:47155 days ago1729626347
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1 wei
170194502024-10-22 19:45:47155 days ago1729626347
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0.00700055 ETH
170194502024-10-22 19:45:47155 days ago1729626347
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0.00005001 ETH
170194502024-10-22 19:45:47155 days ago1729626347
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0.00705057 ETH
170185342024-10-22 18:55:20155 days ago1729623320
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1 wei
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Contract Source Code Verified (Exact Match)

Contract Name:
LiquidityHub

Compiler Version
v0.8.19+commit.7dd6d404

Optimization Enabled:
Yes with 1000000 runs

Other Settings:
default evmVersion
File 1 of 16 : LiquidityHub.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.x;

import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {SafeERC20, IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import {IReactor} from "uniswapx/src/interfaces/IReactor.sol";
import {IReactorCallback} from "uniswapx/src/interfaces/IReactorCallback.sol";
import {IValidationCallback} from "uniswapx/src/interfaces/IValidationCallback.sol";
import {ResolvedOrder, SignedOrder} from "uniswapx/src/base/ReactorStructs.sol";

import {Consts} from "./Consts.sol";
import {Treasury} from "./Treasury.sol";
import {IMulticall, Call} from "./IMulticall.sol";

/**
 * LiquidityHub Executor
 */
contract LiquidityHub is IReactorCallback, IValidationCallback {
    using SafeERC20 for IERC20;

    uint8 public constant VERSION = 4;

    IReactor public immutable reactor;
    Treasury public immutable treasury;

    constructor(IReactor _reactor, Treasury _treasury) {
        reactor = _reactor;
        treasury = _treasury;
    }

    error InvalidSender(address sender);

    modifier onlyAllowed() {
        if (!treasury.allowed(msg.sender)) revert InvalidSender(msg.sender);
        _;
    }

    modifier onlyReactor() {
        if (msg.sender != address(reactor)) revert InvalidSender(msg.sender);
        _;
    }

    /**
     * Entry point
     */
    function execute(SignedOrder[] calldata orders, Call[] calldata calls, address fees, address[] calldata tokens)
        external
        onlyAllowed
    {
        reactor.executeBatchWithCallback(orders, abi.encode(calls));
        _withdraw(fees, tokens);
    }

    /**
     * @dev IReactorCallback
     */
    function reactorCallback(ResolvedOrder[] memory orders, bytes memory callbackData) external override onlyReactor {
        _executeMulticall(abi.decode(callbackData, (Call[])));
        _approveReactorOutputs(orders);
    }

    function _executeMulticall(Call[] memory calls) private {
        Address.functionDelegateCall(
            Consts.MULTICALL_ADDRESS, abi.encodeWithSelector(IMulticall.aggregate.selector, calls)
        );
    }

    function _approveReactorOutputs(ResolvedOrder[] memory orders) private {
        for (uint256 i = 0; i < orders.length; i++) {
            ResolvedOrder memory order = orders[i];
            for (uint256 j = 0; j < order.outputs.length; j++) {
                address token = order.outputs[j].token;
                uint256 amount = order.outputs[j].amount;
                if (token == address(0)) {
                    Address.sendValue(payable(address(reactor)), amount);
                } else {
                    IERC20(token).safeIncreaseAllowance(address(reactor), amount);
                }
            }
        }
    }

    function _withdraw(address fees, address[] calldata tokens) private {
        uint256 nativeBalance = address(this).balance;
        if (nativeBalance > 0) Address.sendValue(payable(fees), nativeBalance);

        for (uint256 i = 0; i < tokens.length; i++) {
            IERC20 token = IERC20(tokens[i]);
            uint256 balance = token.balanceOf(address(this));
            if (balance > 0) token.safeTransfer(fees, balance);
        }
    }

    /**
     * @dev IValidationCallback
     */
    function validate(address filler, ResolvedOrder calldata) external view override {
        if (filler != address(this)) revert InvalidSender(filler);
    }

    receive() external payable {
        // accept ETH
    }
}

File 2 of 16 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

File 3 of 16 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

File 4 of 16 : IReactor.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

import {ResolvedOrder, SignedOrder} from "../base/ReactorStructs.sol";
import {IReactorCallback} from "./IReactorCallback.sol";

/// @notice Interface for order execution reactors
interface IReactor {
    /// @notice Execute a single order
    /// @param order The order definition and valid signature to execute
    function execute(SignedOrder calldata order) external payable;

    /// @notice Execute a single order using the given callback data
    /// @param order The order definition and valid signature to execute
    function executeWithCallback(SignedOrder calldata order, bytes calldata callbackData) external payable;

    /// @notice Execute the given orders at once
    /// @param orders The order definitions and valid signatures to execute
    function executeBatch(SignedOrder[] calldata orders) external payable;

    /// @notice Execute the given orders at once using a callback with the given callback data
    /// @param orders The order definitions and valid signatures to execute
    /// @param callbackData The callbackData to pass to the callback
    function executeBatchWithCallback(SignedOrder[] calldata orders, bytes calldata callbackData) external payable;
}

File 5 of 16 : IReactorCallback.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

import {ResolvedOrder} from "../base/ReactorStructs.sol";

/// @notice Callback for executing orders through a reactor.
interface IReactorCallback {
    /// @notice Called by the reactor during the execution of an order
    /// @param resolvedOrders Has inputs and outputs
    /// @param callbackData The callbackData specified for an order execution
    /// @dev Must have approved each token and amount in outputs to the msg.sender
    function reactorCallback(ResolvedOrder[] memory resolvedOrders, bytes memory callbackData) external;
}

File 6 of 16 : IValidationCallback.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

import {OrderInfo, ResolvedOrder} from "../base/ReactorStructs.sol";

/// @notice Callback to validate an order
interface IValidationCallback {
    /// @notice Called by the reactor for custom validation of an order. Will revert if validation fails
    /// @param filler The filler of the order
    /// @param resolvedOrder The resolved order to fill
    function validate(address filler, ResolvedOrder calldata resolvedOrder) external view;
}

File 7 of 16 : ReactorStructs.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

import {IReactor} from "../interfaces/IReactor.sol";
import {IValidationCallback} from "../interfaces/IValidationCallback.sol";
import {ERC20} from "solmate/src/tokens/ERC20.sol";

/// @dev generic order information
///  should be included as the first field in any concrete order types
struct OrderInfo {
    // The address of the reactor that this order is targeting
    // Note that this must be included in every order so the swapper
    // signature commits to the specific reactor that they trust to fill their order properly
    IReactor reactor;
    // The address of the user which created the order
    // Note that this must be included so that order hashes are unique by swapper
    address swapper;
    // The nonce of the order, allowing for signature replay protection and cancellation
    uint256 nonce;
    // The timestamp after which this order is no longer valid
    uint256 deadline;
    // Custom validation contract
    IValidationCallback additionalValidationContract;
    // Encoded validation params for additionalValidationContract
    bytes additionalValidationData;
}

/// @dev tokens that need to be sent from the swapper in order to satisfy an order
struct InputToken {
    ERC20 token;
    uint256 amount;
    // Needed for dutch decaying inputs
    uint256 maxAmount;
}

/// @dev tokens that need to be received by the recipient in order to satisfy an order
struct OutputToken {
    address token;
    uint256 amount;
    address recipient;
}

/// @dev generic concrete order that specifies exact tokens which need to be sent and received
struct ResolvedOrder {
    OrderInfo info;
    InputToken input;
    OutputToken[] outputs;
    bytes sig;
    bytes32 hash;
}

/// @dev external struct including a generic encoded order and swapper signature
///  The order bytes will be parsed and mapped to a ResolvedOrder in the concrete reactor contract
struct SignedOrder {
    bytes order;
    bytes sig;
}

File 8 of 16 : Consts.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.x;

library Consts {
    address public constant MULTICALL_ADDRESS = 0xcA11bde05977b3631167028862bE2a173976CA11;
    address public constant PERMIT2_ADDRESS = 0x000000000022D473030F116dDEE9F6B43aC78BA3;
}

File 9 of 16 : Treasury.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.x;

import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {SafeERC20, IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import {Consts} from "./Consts.sol";
import {IWETH} from "./IWETH.sol";
import {IMulticall, Call} from "./IMulticall.sol";

contract Treasury is Ownable {
    using SafeERC20 for IERC20;

    IWETH public immutable weth;
    mapping(address => bool) public allowed;

    constructor(IWETH _weth, address _owner) Ownable() {
        weth = _weth;
        allowed[_owner] = true;
        transferOwnership(_owner);
    }

    error NotAllowed(address sender);

    modifier onlyAllowed() {
        if (!allowed[msg.sender]) revert NotAllowed(msg.sender);
        _;
    }

    function set(address[] calldata addr, bool value) external onlyOwner {
        for (uint256 i = 0; i < addr.length; i++) {
            allowed[addr[i]] = value;
        }
    }

    function execute(Call[] calldata calls) external onlyAllowed {
        Address.functionDelegateCall(
            Consts.MULTICALL_ADDRESS, abi.encodeWithSelector(IMulticall.aggregate.selector, calls)
        );
        withdraw(new IERC20[](0));
    }

    function withdraw(IERC20[] memory tokens) public onlyAllowed {
        for (uint256 i = 0; i < tokens.length; i++) {
            tokens[i].safeTransfer(owner(), tokens[i].balanceOf(address(this)));
        }
        weth.withdraw(weth.balanceOf(address(this)));
        Address.sendValue(payable(owner()), address(this).balance);
    }

    receive() external payable {
        // accept ETH
    }
}

File 10 of 16 : IMulticall.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.x;

struct Call {
    address target;
    bytes callData;
}

struct Result {
    bool success;
    bytes returnData;
}

interface IMulticall {
    function aggregate(Call[] calldata calls) external payable returns (Result[] memory returnData);
}

File 11 of 16 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

File 12 of 16 : IERC20Permit.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

File 13 of 16 : ERC20.sol
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

File 14 of 16 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 15 of 16 : IWETH.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.x;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

interface IWETH is IERC20 {
    function deposit() external payable;
    function withdraw(uint256 wad) external;
}

File 16 of 16 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

Settings
{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/contracts/",
    "permit2/=lib/permit2/",
    "uniswapx/=lib/UniswapX/",
    "solmate/=lib/solmate/",
    "multicall/=lib/multicall/",
    "@ds/=lib/multicall/lib/ds-test/src/",
    "@std/=lib/multicall/lib/forge-std/src/",
    "UniswapX/=lib/UniswapX/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-gas-snapshot/=lib/UniswapX/lib/forge-gas-snapshot/src/",
    "openzeppelin/=lib/openzeppelin-contracts/contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "libraries": {}
}

Contract Security Audit

Contract ABI

API
[{"inputs":[{"internalType":"contract IReactor","name":"_reactor","type":"address"},{"internalType":"contract Treasury","name":"_treasury","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"sender","type":"address"}],"name":"InvalidSender","type":"error"},{"inputs":[],"name":"VERSION","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bytes","name":"order","type":"bytes"},{"internalType":"bytes","name":"sig","type":"bytes"}],"internalType":"struct SignedOrder[]","name":"orders","type":"tuple[]"},{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct Call[]","name":"calls","type":"tuple[]"},{"internalType":"address","name":"fees","type":"address"},{"internalType":"address[]","name":"tokens","type":"address[]"}],"name":"execute","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reactor","outputs":[{"internalType":"contract IReactor","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"components":[{"internalType":"contract IReactor","name":"reactor","type":"address"},{"internalType":"address","name":"swapper","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"contract IValidationCallback","name":"additionalValidationContract","type":"address"},{"internalType":"bytes","name":"additionalValidationData","type":"bytes"}],"internalType":"struct OrderInfo","name":"info","type":"tuple"},{"components":[{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"maxAmount","type":"uint256"}],"internalType":"struct InputToken","name":"input","type":"tuple"},{"components":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"internalType":"struct OutputToken[]","name":"outputs","type":"tuple[]"},{"internalType":"bytes","name":"sig","type":"bytes"},{"internalType":"bytes32","name":"hash","type":"bytes32"}],"internalType":"struct ResolvedOrder[]","name":"orders","type":"tuple[]"},{"internalType":"bytes","name":"callbackData","type":"bytes"}],"name":"reactorCallback","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"contract Treasury","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"filler","type":"address"},{"components":[{"components":[{"internalType":"contract IReactor","name":"reactor","type":"address"},{"internalType":"address","name":"swapper","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"contract IValidationCallback","name":"additionalValidationContract","type":"address"},{"internalType":"bytes","name":"additionalValidationData","type":"bytes"}],"internalType":"struct OrderInfo","name":"info","type":"tuple"},{"components":[{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"maxAmount","type":"uint256"}],"internalType":"struct InputToken","name":"input","type":"tuple"},{"components":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"internalType":"struct OutputToken[]","name":"outputs","type":"tuple[]"},{"internalType":"bytes","name":"sig","type":"bytes"},{"internalType":"bytes32","name":"hash","type":"bytes32"}],"internalType":"struct ResolvedOrder","name":"","type":"tuple"}],"name":"validate","outputs":[],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000e9e78109c89162cef32bfe7cbcee1f31312fc1f6000000000000000000000000a80558f2c28f5be7fd023d20f9355ebf8390af48

-----Decoded View---------------
Arg [0] : _reactor (address): 0xe9E78109c89162cEF32Bfe7cBCEe1f31312fc1F6
Arg [1] : _treasury (address): 0xA80558F2C28f5bE7FD023d20f9355EbF8390AF48

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000e9e78109c89162cef32bfe7cbcee1f31312fc1f6
Arg [1] : 000000000000000000000000a80558f2c28f5be7fd023d20f9355ebf8390af48


Block Transaction Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.