Overview
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0 ETH
ETH Value
$0.00More Info
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Latest 25 from a total of 25 transactions
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Execute | 19747820 | 27 hrs ago | IN | 0 ETH | 0.00000661 | ||||
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Execute | 19721541 | 2 days ago | IN | 0 ETH | 0.00001914 | ||||
Execute | 19712807 | 2 days ago | IN | 0 ETH | 0.00000946 | ||||
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Execute | 19682904 | 3 days ago | IN | 0 ETH | 0.00003403 | ||||
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Execute | 19656446 | 4 days ago | IN | 0 ETH | 0.00019237 | ||||
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Latest 25 internal transactions (View All)
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Contract Name:
LiquidityHub
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 1000000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.x; import {IMulticall3} from "forge-std/interfaces/IMulticall3.sol"; 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 {ExclusiveDutchOrder} from "uniswapx/src/lib/ExclusiveDutchOrderLib.sol"; import {Consts} from "./Consts.sol"; /** * LiquidityHub Executor */ contract LiquidityHub is IReactorCallback, IValidationCallback { using SafeERC20 for IERC20; error InvalidSender(address sender); error InvalidOrder(); event Resolved( bytes32 indexed orderHash, address indexed swapper, address indexed ref, address inToken, address outToken, uint256 inAmount, uint256 outAmount ); event ExtraOut(address indexed recipient, address token, uint256 amount); event Surplus(address indexed ref, address swapper, address token, uint256 amount, uint256 refshare); uint8 public constant VERSION = 6; address public constant INVALID_ADDRESS = address(1); IReactor public immutable reactor; IAllowed public immutable allowed; constructor(IReactor _reactor, IAllowed _allowed) { reactor = _reactor; allowed = _allowed; } modifier onlyAllowed() { if (!allowed.allowed(msg.sender)) revert InvalidSender(msg.sender); _; } modifier onlyReactor() { if (msg.sender != address(reactor)) revert InvalidSender(msg.sender); _; } /** * Entry point */ function execute(SignedOrder calldata order, IMulticall3.Call[] calldata calls, uint256 outAmountSwapper) external onlyAllowed { reactor.executeWithCallback(order, abi.encode(calls, outAmountSwapper)); ExclusiveDutchOrder memory o = abi.decode(order.order, (ExclusiveDutchOrder)); (address ref, uint8 share) = abi.decode(o.info.additionalValidationData, (address, uint8)); _surplus(ref, o.info.swapper, address(o.input.token), share); for (uint256 i = 0; i < o.outputs.length; i++) { _surplus(ref, o.info.swapper, address(o.outputs[i].token), share); } } /** * @dev IReactorCallback */ function reactorCallback(ResolvedOrder[] memory orders, bytes memory callbackData) external override onlyReactor { ResolvedOrder memory order = orders[0]; (IMulticall3.Call[] memory calls, uint256 outAmountSwapper) = abi.decode(callbackData, (IMulticall3.Call[], uint256)); _executeMulticall(calls); (address outToken, uint256 outAmount) = _handleOrderOutputs(order); if (outAmountSwapper > outAmount) _transfer(outToken, order.info.swapper, outAmountSwapper - outAmount); address ref = abi.decode(order.info.additionalValidationData, (address)); emit Resolved( order.hash, order.info.swapper, ref, address(order.input.token), outToken, order.input.amount, outAmount ); } function _executeMulticall(IMulticall3.Call[] memory calls) private { Address.functionDelegateCall( Consts.MULTICALL_ADDRESS, abi.encodeWithSelector(IMulticall3.aggregate.selector, calls) ); } function _handleOrderOutputs(ResolvedOrder memory order) private returns (address outToken, uint256 outAmount) { outToken = INVALID_ADDRESS; for (uint256 i = 0; i < order.outputs.length; i++) { uint256 amount = order.outputs[i].amount; if (amount > 0) { address token = address(order.outputs[i].token); _outputReactor(token, amount); if (order.outputs[i].recipient == order.info.swapper) { if (outToken != INVALID_ADDRESS && outToken != token) revert InvalidOrder(); outToken = token; outAmount += amount; } else { emit ExtraOut(order.outputs[i].recipient, token, amount); } } } } function _surplus(address ref, address swapper, address token, uint8 share) private { uint256 balance = _balanceOf(token, address(this)); if (balance == 0) return; uint256 refshare = (ref != address(0)) ? balance * share / 100 : 0; if (refshare > 0) _transfer(token, ref, refshare); _transfer(token, swapper, balance - refshare); emit Surplus(ref, swapper, token, balance, refshare); } function _outputReactor(address token, uint256 amount) private { if (token == address(0)) { Address.sendValue(payable(address(reactor)), amount); } else { uint256 allowance = IERC20(token).allowance(address(this), address(reactor)); IERC20(token).safeApprove(address(reactor), 0); IERC20(token).safeApprove(address(reactor), allowance + amount); } } function _transfer(address token, address to, uint256 amount) private { if (token == address(0)) Address.sendValue(payable(to), amount); else IERC20(token).safeTransfer(to, amount); } function _balanceOf(address token, address who) private view returns (uint256) { return (token == address(0)) ? who.balance : IERC20(token).balanceOf(who); } /** * @dev IValidationCallback */ function validate(address filler, ResolvedOrder calldata) external view override { if (filler != address(this)) revert InvalidSender(filler); } receive() external payable { // accept ETH } } interface IAllowed { function allowed(address) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <0.9.0; pragma experimental ABIEncoderV2; interface IMulticall3 { struct Call { address target; bytes callData; } struct Call3 { address target; bool allowFailure; bytes callData; } struct Call3Value { address target; bool allowFailure; uint256 value; bytes callData; } struct Result { bool success; bytes returnData; } function aggregate(Call[] calldata calls) external payable returns (uint256 blockNumber, bytes[] memory returnData); function aggregate3(Call3[] calldata calls) external payable returns (Result[] memory returnData); function aggregate3Value(Call3Value[] calldata calls) external payable returns (Result[] memory returnData); function blockAndAggregate(Call[] calldata calls) external payable returns (uint256 blockNumber, bytes32 blockHash, Result[] memory returnData); function getBasefee() external view returns (uint256 basefee); function getBlockHash(uint256 blockNumber) external view returns (bytes32 blockHash); function getBlockNumber() external view returns (uint256 blockNumber); function getChainId() external view returns (uint256 chainid); function getCurrentBlockCoinbase() external view returns (address coinbase); function getCurrentBlockDifficulty() external view returns (uint256 difficulty); function getCurrentBlockGasLimit() external view returns (uint256 gaslimit); function getCurrentBlockTimestamp() external view returns (uint256 timestamp); function getEthBalance(address addr) external view returns (uint256 balance); function getLastBlockHash() external view returns (bytes32 blockHash); function tryAggregate(bool requireSuccess, Call[] calldata calls) external payable returns (Result[] memory returnData); function tryBlockAndAggregate(bool requireSuccess, Call[] calldata calls) external payable returns (uint256 blockNumber, bytes32 blockHash, Result[] memory returnData); }
// 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); } } }
// 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)); } }
// 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; }
// 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; }
// 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; }
// 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; }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity ^0.8.0; import {OrderInfo} from "../base/ReactorStructs.sol"; import {DutchOutput, DutchInput, DutchOrderLib} from "./DutchOrderLib.sol"; import {OrderInfoLib} from "./OrderInfoLib.sol"; struct ExclusiveDutchOrder { // generic order information OrderInfo info; // The time at which the DutchOutputs start decaying uint256 decayStartTime; // The time at which price becomes static uint256 decayEndTime; // The address who has exclusive rights to the order until decayStartTime address exclusiveFiller; // The amount in bps that a non-exclusive filler needs to improve the outputs by to be able to fill the order uint256 exclusivityOverrideBps; // The tokens that the swapper will provide when settling the order DutchInput input; // The tokens that must be received to satisfy the order DutchOutput[] outputs; } /// @notice helpers for handling dutch order objects library ExclusiveDutchOrderLib { using DutchOrderLib for DutchOutput[]; using OrderInfoLib for OrderInfo; bytes internal constant EXCLUSIVE_DUTCH_LIMIT_ORDER_TYPE = abi.encodePacked( "ExclusiveDutchOrder(", "OrderInfo info,", "uint256 decayStartTime,", "uint256 decayEndTime,", "address exclusiveFiller,", "uint256 exclusivityOverrideBps,", "address inputToken,", "uint256 inputStartAmount,", "uint256 inputEndAmount,", "DutchOutput[] outputs)" ); bytes internal constant ORDER_TYPE = abi.encodePacked( EXCLUSIVE_DUTCH_LIMIT_ORDER_TYPE, DutchOrderLib.DUTCH_OUTPUT_TYPE, OrderInfoLib.ORDER_INFO_TYPE ); bytes32 internal constant ORDER_TYPE_HASH = keccak256(ORDER_TYPE); /// @dev Note that sub-structs have to be defined in alphabetical order in the EIP-712 spec string internal constant PERMIT2_ORDER_TYPE = string( abi.encodePacked( "ExclusiveDutchOrder witness)", DutchOrderLib.DUTCH_OUTPUT_TYPE, EXCLUSIVE_DUTCH_LIMIT_ORDER_TYPE, OrderInfoLib.ORDER_INFO_TYPE, DutchOrderLib.TOKEN_PERMISSIONS_TYPE ) ); /// @notice hash the given order /// @param order the order to hash /// @return the eip-712 order hash function hash(ExclusiveDutchOrder memory order) internal pure returns (bytes32) { return keccak256( abi.encode( ORDER_TYPE_HASH, order.info.hash(), order.decayStartTime, order.decayEndTime, order.exclusiveFiller, order.exclusivityOverrideBps, order.input.token, order.input.startAmount, order.input.endAmount, order.outputs.hash() ) ); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.x; library Consts { address public constant MULTICALL_ADDRESS = 0xcA11bde05977b3631167028862bE2a173976CA11; address public constant PERMIT2_ADDRESS = 0x000000000022D473030F116dDEE9F6B43aC78BA3; }
// 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); }
// 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); }
// 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); } }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity ^0.8.0; import {OrderInfo} from "../base/ReactorStructs.sol"; import {OrderInfoLib} from "./OrderInfoLib.sol"; import {ERC20} from "solmate/src/tokens/ERC20.sol"; /// @dev An amount of output tokens that decreases linearly over time struct DutchOutput { // The ERC20 token address (or native ETH address) address token; // The amount of tokens at the start of the time period uint256 startAmount; // The amount of tokens at the end of the time period uint256 endAmount; // The address who must receive the tokens to satisfy the order address recipient; } /// @dev An amount of input tokens that increases linearly over time struct DutchInput { // The ERC20 token address ERC20 token; // The amount of tokens at the start of the time period uint256 startAmount; // The amount of tokens at the end of the time period uint256 endAmount; } struct DutchOrder { // generic order information OrderInfo info; // The time at which the DutchOutputs start decaying uint256 decayStartTime; // The time at which price becomes static uint256 decayEndTime; // The tokens that the swapper will provide when settling the order DutchInput input; // The tokens that must be received to satisfy the order DutchOutput[] outputs; } /// @notice helpers for handling dutch order objects library DutchOrderLib { using OrderInfoLib for OrderInfo; bytes internal constant DUTCH_OUTPUT_TYPE = "DutchOutput(address token,uint256 startAmount,uint256 endAmount,address recipient)"; bytes32 internal constant DUTCH_OUTPUT_TYPE_HASH = keccak256(DUTCH_OUTPUT_TYPE); bytes internal constant DUTCH_LIMIT_ORDER_TYPE = abi.encodePacked( "DutchOrder(", "OrderInfo info,", "uint256 decayStartTime,", "uint256 decayEndTime,", "address inputToken,", "uint256 inputStartAmount,", "uint256 inputEndAmount,", "DutchOutput[] outputs)" ); /// @dev Note that sub-structs have to be defined in alphabetical order in the EIP-712 spec bytes internal constant ORDER_TYPE = abi.encodePacked(DUTCH_LIMIT_ORDER_TYPE, DUTCH_OUTPUT_TYPE, OrderInfoLib.ORDER_INFO_TYPE); bytes32 internal constant ORDER_TYPE_HASH = keccak256(ORDER_TYPE); string internal constant TOKEN_PERMISSIONS_TYPE = "TokenPermissions(address token,uint256 amount)"; string internal constant PERMIT2_ORDER_TYPE = string(abi.encodePacked("DutchOrder witness)", ORDER_TYPE, TOKEN_PERMISSIONS_TYPE)); /// @notice hash the given output /// @param output the output to hash /// @return the eip-712 output hash function hash(DutchOutput memory output) internal pure returns (bytes32) { return keccak256( abi.encode(DUTCH_OUTPUT_TYPE_HASH, output.token, output.startAmount, output.endAmount, output.recipient) ); } /// @notice hash the given outputs /// @param outputs the outputs to hash /// @return the eip-712 outputs hash function hash(DutchOutput[] memory outputs) internal pure returns (bytes32) { unchecked { bytes memory packedHashes = new bytes(32 * outputs.length); for (uint256 i = 0; i < outputs.length; i++) { bytes32 outputHash = hash(outputs[i]); assembly { mstore(add(add(packedHashes, 0x20), mul(i, 0x20)), outputHash) } } return keccak256(packedHashes); } } /// @notice hash the given order /// @param order the order to hash /// @return the eip-712 order hash function hash(DutchOrder memory order) internal pure returns (bytes32) { return keccak256( abi.encode( ORDER_TYPE_HASH, order.info.hash(), order.decayStartTime, order.decayEndTime, order.input.token, order.input.startAmount, order.input.endAmount, hash(order.outputs) ) ); } }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity ^0.8.0; import {OrderInfo} from "../base/ReactorStructs.sol"; /// @notice helpers for handling OrderInfo objects library OrderInfoLib { bytes internal constant ORDER_INFO_TYPE = "OrderInfo(address reactor,address swapper,uint256 nonce,uint256 deadline,address additionalValidationContract,bytes additionalValidationData)"; bytes32 internal constant ORDER_INFO_TYPE_HASH = keccak256(ORDER_INFO_TYPE); /// @notice hash an OrderInfo object /// @param info The OrderInfo object to hash function hash(OrderInfo memory info) internal pure returns (bytes32) { return keccak256( abi.encode( ORDER_INFO_TYPE_HASH, info.reactor, info.swapper, info.nonce, info.deadline, info.additionalValidationContract, keccak256(info.additionalValidationData) ) ); } }
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Contract Security Audit
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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000c19e284c8f5ccef721a761d0ca18dc8e9a612afd000000000000000000000000000066320a467de62b1548f46465abbb82662331
-----Decoded View---------------
Arg [0] : _reactor (address): 0xc19E284C8f5ccef721a761d0CA18dc8E9a612aFd
Arg [1] : _allowed (address): 0x000066320a467dE62B1548f46465abBB82662331
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000c19e284c8f5ccef721a761d0ca18dc8e9a612afd
Arg [1] : 000000000000000000000000000066320a467de62b1548f46465abbb82662331
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Multichain Portfolio | 30 Chains
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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.