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0x60e06040 | 17824369 | 351 days ago | IN | Create: ZeroExSwapHandler | 0 ETH | 0.01967984 |
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Contract Name:
ZeroExSwapHandler
Compiler Version
v0.8.18+commit.87f61d96
Optimization Enabled:
Yes with 850 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.4; import { CoreSwapHandlerV1 } from "../../core/CoreSwapHandler/CoreSwapHandlerV1.sol"; import { ZeroExApiAdapter } from "../../protocols/zeroEx/ZeroExApiAdapter.sol"; import { CallUtils } from "../../tools/BubbleReverts/BubbleReverts.sol"; import { SwapDeadlineExceeded } from "../../core/libraries/DefinitiveErrors.sol"; import { BaseAccessControl, CoreAccessControlConfig } from "../../base/BaseAccessControl.sol"; contract ZeroExSwapHandler is CoreSwapHandlerV1, ZeroExApiAdapter { constructor(address _zeroExProxy, address _wethAddress) ZeroExApiAdapter(_zeroExProxy, _wethAddress) {} receive() external payable {} function decodeParams(bytes memory data) public pure returns (ZeroExSwapParams memory zeroExSwapParams) { zeroExSwapParams = abi.decode(data, (ZeroExSwapParams)); } function _performSwap(SwapParams memory params) internal override { ZeroExSwapParams memory zeroExSwapParams = decodeParams(params.data); if (zeroExSwapParams.deadline < block.timestamp) { revert SwapDeadlineExceeded(); } (bool _success, bytes memory _returnBytes) = zeroExAddress.call{ value: msg.value }(zeroExSwapParams.swapData); if (!_success) { CallUtils.revertFromReturnedData(_returnBytes); } } function _getSpenderAddress(bytes memory) internal view override returns (address) { return zeroExAddress; } // TODO (DEF-916) - Add validation function _validatePools(SwapParams memory params, bool) internal view override { // _validateZeroExPayload( // params.inputAssetAddress, // params.outputAssetAddress, // msg.sender, // params.inputAmount, // params.minOutputAmount, // params.data // ); } /** * @notice no implementation because `_validatePools` handles both path and swap validation */ function _validateSwap(SwapParams memory params) internal pure override {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ```solidity * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ```solidity * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules} * to enforce additional security measures for this role. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(account), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. * * May emit a {RoleRevoked} event. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * May emit a {RoleGranted} event. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } }
// 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: 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/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. Compatible with tokens that require the approval to be set to * 0 before setting it to a non-zero value. */ 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: 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 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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value)))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
pragma solidity >=0.6.2; interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); }
pragma solidity >=0.6.2; import './IUniswapV2Router01.sol'; interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; import { AccessControl as OZAccessControl } from "@openzeppelin/contracts/access/AccessControl.sol"; import { Strings } from "@openzeppelin/contracts/utils/Strings.sol"; import { CoreAccessControl, CoreAccessControlConfig } from "../core/CoreAccessControl/v1/CoreAccessControl.sol"; import { CoreStopGuardian } from "../core/CoreStopGuardian/v1/CoreStopGuardian.sol"; abstract contract BaseAccessControl is CoreAccessControl, CoreStopGuardian { /** * @dev * Modifiers inherited from CoreAccessControl: * onlyDefinitive * onlyClients * onlyWhitelisted * onlyClientAdmin * onlyDefinitiveAdmin * * Modifiers inherited from CoreStopGuardian: * stopGuarded */ constructor(CoreAccessControlConfig memory coreAccessControlConfig) CoreAccessControl(coreAccessControlConfig) {} /** * @dev Inherited from CoreStopGuardian */ function enableStopGuardian() public override onlyAdmins { return _enableStopGuardian(); } /** * @dev Inherited from CoreStopGuardian */ function disableStopGuardian() public override onlyClientAdmin { return _disableStopGuardian(); } }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; import { AccessControl as OZAccessControl } from "@openzeppelin/contracts/access/AccessControl.sol"; import { Strings } from "@openzeppelin/contracts/utils/Strings.sol"; import { ICoreAccessControlV1 } from "./ICoreAccessControlV1.sol"; import { AccountNotAdmin, AccountNotWhitelisted, AccountMissingRole } from "../../libraries/DefinitiveErrors.sol"; struct CoreAccessControlConfig { address admin; address definitiveAdmin; address[] definitive; address[] client; } abstract contract CoreAccessControl is ICoreAccessControlV1, OZAccessControl { // roles bytes32 public constant ROLE_DEFINITIVE = keccak256("DEFINITIVE"); bytes32 public constant ROLE_DEFINITIVE_ADMIN = keccak256("DEFINITIVE_ADMIN"); bytes32 public constant ROLE_CLIENT = keccak256("CLIENT"); modifier onlyDefinitive() { _checkRole(ROLE_DEFINITIVE); _; } modifier onlyDefinitiveAdmin() { _checkRole(ROLE_DEFINITIVE_ADMIN); _; } modifier onlyClients() { _checkRole(ROLE_CLIENT); _; } modifier onlyClientAdmin() { _checkRole(DEFAULT_ADMIN_ROLE); _; } // default admin + definitive admin modifier onlyAdmins() { bool isAdmins = (hasRole(DEFAULT_ADMIN_ROLE, _msgSender()) || hasRole(ROLE_DEFINITIVE_ADMIN, _msgSender())); if (!isAdmins) { revert AccountNotAdmin(_msgSender()); } _; } // client + definitive modifier onlyWhitelisted() { bool isWhitelisted = (hasRole(ROLE_CLIENT, _msgSender()) || hasRole(ROLE_DEFINITIVE, _msgSender())); if (!isWhitelisted) { revert AccountNotWhitelisted(_msgSender()); } _; } constructor(CoreAccessControlConfig memory cfg) { // admin _setupRole(DEFAULT_ADMIN_ROLE, cfg.admin); // definitive admin _setupRole(ROLE_DEFINITIVE_ADMIN, cfg.definitiveAdmin); _setRoleAdmin(ROLE_DEFINITIVE_ADMIN, ROLE_DEFINITIVE_ADMIN); // definitive uint256 cfgDefinitiveLength = cfg.definitive.length; for (uint256 i; i < cfgDefinitiveLength; ) { _setupRole(ROLE_DEFINITIVE, cfg.definitive[i]); unchecked { ++i; } } _setRoleAdmin(ROLE_DEFINITIVE, ROLE_DEFINITIVE_ADMIN); // clients - implicit role admin is DEFAULT_ADMIN_ROLE uint256 cfgClientLength = cfg.client.length; for (uint256 i; i < cfgClientLength; ) { _setupRole(ROLE_CLIENT, cfg.client[i]); unchecked { ++i; } } } function _checkRole(bytes32 role, address account) internal view virtual override { if (!hasRole(role, account)) { revert AccountMissingRole(account, role); } } }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; import { IAccessControl } from "@openzeppelin/contracts/access/IAccessControl.sol"; interface ICoreAccessControlV1 is IAccessControl { function ROLE_CLIENT() external returns (bytes32); function ROLE_DEFINITIVE() external returns (bytes32); function ROLE_DEFINITIVE_ADMIN() external returns (bytes32); }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; import { ICoreStopGuardianV1 } from "./ICoreStopGuardianV1.sol"; import { Context } from "@openzeppelin/contracts/utils/Context.sol"; import { StopGuardianEnabled } from "../../libraries/DefinitiveErrors.sol"; abstract contract CoreStopGuardian is ICoreStopGuardianV1, Context { bool public STOP_GUARDIAN_ENABLED; // recommended for every public/external function modifier stopGuarded() { if (STOP_GUARDIAN_ENABLED) { revert StopGuardianEnabled(); } _; } function enableStopGuardian() public virtual; function disableStopGuardian() public virtual; function _enableStopGuardian() internal { STOP_GUARDIAN_ENABLED = true; emit StopGuardianUpdate(_msgSender(), true); } function _disableStopGuardian() internal { STOP_GUARDIAN_ENABLED = false; emit StopGuardianUpdate(_msgSender(), false); } }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; interface ICoreStopGuardianV1 { event StopGuardianUpdate(address indexed actor, bool indexed isEnabled); function STOP_GUARDIAN_ENABLED() external view returns (bool); function enableStopGuardian() external; function disableStopGuardian() external; }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; import { InvalidAmount, InvalidExecutedOutputAmount, InvalidMsgValue, InvalidSwapInputAmount } from "../libraries/DefinitiveErrors.sol"; import { DefinitiveConstants } from "../libraries/DefinitiveConstants.sol"; import { DefinitiveAssets, IERC20 } from "../libraries/DefinitiveAssets.sol"; import { Context } from "@openzeppelin/contracts/utils/Context.sol"; import { ICoreSwapHandlerV1 } from "./ICoreSwapHandlerV1.sol"; import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import { IUniswapV2Router02 } from "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol"; abstract contract CoreSwapHandlerV1 is ICoreSwapHandlerV1, Context, ReentrancyGuard { using DefinitiveAssets for IERC20; function swapCall(SwapParams calldata params) external payable nonReentrant returns (uint256, address) { return _swapCall(params, false /* enforceAllowedPools */); } function swapDelegate(SwapParams calldata params) external payable nonReentrant returns (uint256, address) { return _swapDelegate(params, false /* enforceAllowedPools */); } function swapUsingValidatedPathCall( SwapParams calldata params ) external payable nonReentrant returns (uint256, address) { return _swapCall(params, true /* enforceAllowedPools */); } function _swapCall( SwapParams memory params, bool enforceAllowedPools ) private returns (uint256 amountOut, address) { bool isInputAddressNativeAsset = params.inputAssetAddress == DefinitiveConstants.NATIVE_ASSET_ADDRESS; uint256 rawInputAmount = params.inputAmount; // Calls to swap native assets must provide a non-zero input amount if (isInputAddressNativeAsset && rawInputAmount == 0) { revert InvalidSwapInputAmount(); } // Calls to swap native assets must match the input amount and msg.value if (isInputAddressNativeAsset && rawInputAmount != msg.value) { revert InvalidMsgValue(); } // Calls to swap non-native assets must have msg.value equal to 0 if (!isInputAddressNativeAsset && msg.value != 0) { revert InvalidMsgValue(); } // Update SwapParams with parsed input amount params.inputAmount = rawInputAmount > 0 ? rawInputAmount : _getTokenAllowance(params.inputAssetAddress); if (params.inputAssetAddress != DefinitiveConstants.NATIVE_ASSET_ADDRESS) { IERC20(params.inputAssetAddress).safeTransferFrom(_msgSender(), address(this), params.inputAmount); } _validateSwap(params); _validatePools(params, enforceAllowedPools); (amountOut, ) = _swap(params); if (params.outputAssetAddress == DefinitiveConstants.NATIVE_ASSET_ADDRESS) { DefinitiveAssets.safeTransferETH(payable(_msgSender()), amountOut); } else { IERC20(params.outputAssetAddress).safeTransfer(_msgSender(), amountOut); } return (amountOut, params.outputAssetAddress); } function _swapDelegate(SwapParams memory params, bool enforceAllowedPools) private returns (uint256, address) { uint256 rawInputAmount = params.inputAmount; uint256 parsedInputAmount = rawInputAmount > 0 ? rawInputAmount : DefinitiveAssets.getBalance(params.inputAssetAddress); if (parsedInputAmount == 0) { revert InvalidSwapInputAmount(); } // Update SwapParams with parsed input amount params.inputAmount = parsedInputAmount; _validateSwap(params); _validatePools(params, enforceAllowedPools); return _swap(params); } /** * @notice This method holds the logic for performing the swap. * @param params SwapParams */ function _performSwap(SwapParams memory params) internal virtual; /** * @notice Method to confirm that the swap is using valid pools based on our criteria * @param params SwapParams * @param enforceAllowedPools boolean to determine if we should enforce allowed pools */ function _validatePools(SwapParams memory params, bool enforceAllowedPools) internal virtual; /** * @notice Method to confirm that the swap parameters are valid for the third party * @param params SwapParams */ function _validateSwap(SwapParams memory params) internal virtual; /** * @notice When `rawInputAmount` is 0, `swapCall` will use the allowance as the input amount * @param inputAssetAddress asset to swap from */ function _getTokenAllowance(address inputAssetAddress) private view returns (uint256) { uint256 allowance = IERC20(inputAssetAddress).allowance(_msgSender(), address(this)); if (allowance == 0) { revert InvalidSwapInputAmount(); } return allowance; } /** * @notice Returns the address we need to approve in order to swap assets * @param data included with the swap method invocation */ function _getSpenderAddress(bytes memory data) internal virtual returns (address); /** * @notice Internal swap logic that performs the swap and validates the output amount * @param params SwapParams * @return output amount and output asset address */ function _swap(SwapParams memory params) private returns (uint256, address) { if (params.inputAssetAddress != DefinitiveConstants.NATIVE_ASSET_ADDRESS) { IERC20(params.inputAssetAddress).resetAndSafeIncreaseAllowance( address(this), _getSpenderAddress(params.data), params.inputAmount ); } uint256 outputAmountDelta = DefinitiveAssets.getBalance(params.outputAssetAddress); _performSwap(params); outputAmountDelta = DefinitiveAssets.getBalance(params.outputAssetAddress) - outputAmountDelta; if (outputAmountDelta < params.minOutputAmount) { revert InvalidExecutedOutputAmount(); } emit Swap( _msgSender(), params.inputAssetAddress, params.inputAmount, params.outputAssetAddress, outputAmountDelta ); return (outputAmountDelta, params.outputAssetAddress); } }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; interface ICoreSwapHandlerV1 { event Swap( address indexed actor, address indexed inputToken, uint256 inputAmount, address indexed outputToken, uint256 outputAmount ); struct SwapParams { address inputAssetAddress; uint256 inputAmount; address outputAssetAddress; uint256 minOutputAmount; bytes data; bytes signature; } function swapCall(SwapParams calldata params) external payable returns (uint256 amountOut, address outputAsset); function swapDelegate(SwapParams calldata params) external payable returns (uint256 amountOut, address outputAsset); function swapUsingValidatedPathCall( SwapParams calldata params ) external payable returns (uint256 amountOut, address outputAsset); }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; import { IERC20, SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { SafeTransferLib } from "solmate/src/utils/SafeTransferLib.sol"; import { DefinitiveConstants } from "./DefinitiveConstants.sol"; import { InsufficientBalance, InvalidAmount, InvalidAmounts, InvalidERC20Address } from "./DefinitiveErrors.sol"; /** * @notice Contains methods used throughout the Definitive contracts * @dev This file should only be used as an internal library. */ library DefinitiveAssets { /** * @dev Checks if an address is a valid ERC20 token */ modifier onlyValidERC20(address erc20Token) { if (address(erc20Token) == DefinitiveConstants.NATIVE_ASSET_ADDRESS) { revert InvalidERC20Address(); } _; } ////////////////////////////////////////////////// ////////////////////////////////////////////////// // ↓ ERC20 and Native Asset Methods ↓ ////////////////////////////////////////////////// /** * @dev Gets the balance of an ERC20 token or native asset */ function getBalance(address assetAddress) internal view returns (uint256) { if (assetAddress == DefinitiveConstants.NATIVE_ASSET_ADDRESS) { return address(this).balance; } else { return IERC20(assetAddress).balanceOf(address(this)); } } /** * @dev internal function to validate balance is higher than a given amount for ERC20 and native assets */ function validateBalance(address token, uint256 amount) internal view { if (token == DefinitiveConstants.NATIVE_ASSET_ADDRESS) { validateNativeBalance(amount); } else { validateERC20Balance(token, amount); } } ////////////////////////////////////////////////// ////////////////////////////////////////////////// // ↓ Native Asset Methods ↓ ////////////////////////////////////////////////// /** * @dev validates amount and balance, then uses SafeTransferLib to transfer native asset */ function safeTransferETH(address recipient, uint256 amount) internal { if (amount > 0) { SafeTransferLib.safeTransferETH(payable(recipient), amount); } } ////////////////////////////////////////////////// ////////////////////////////////////////////////// // ↓ ERC20 Methods ↓ ////////////////////////////////////////////////// /** * @dev Resets and increases the allowance of a spender for an ERC20 token */ function resetAndSafeIncreaseAllowance( IERC20 token, address owner, address spender, uint256 amount ) internal onlyValidERC20(address(token)) { if (token.allowance(owner, spender) > 0) { SafeERC20.safeApprove(token, spender, 0); } return SafeERC20.safeIncreaseAllowance(token, spender, amount); } function safeTransfer(IERC20 token, address to, uint256 amount) internal onlyValidERC20(address(token)) { if (amount > 0) { SafeERC20.safeTransfer(token, to, amount); } } function safeTransferFrom( IERC20 token, address from, address to, uint256 amount ) internal onlyValidERC20(address(token)) { if (amount > 0) { //slither-disable-next-line arbitrary-send-erc20 SafeERC20.safeTransferFrom(token, from, to, amount); } } ////////////////////////////////////////////////// ////////////////////////////////////////////////// // ↓ Asset Amount Helper Methods ↓ ////////////////////////////////////////////////// /** * @dev internal function to validate that amounts contains a value greater than zero */ function validateAmounts(uint256[] calldata amounts) internal pure { bool hasValidAmounts; uint256 amountsLength = amounts.length; for (uint256 i; i < amountsLength; ) { if (amounts[i] > 0) { hasValidAmounts = true; break; } unchecked { ++i; } } if (!hasValidAmounts) { revert InvalidAmounts(); } } /** * @dev internal function to validate if native asset balance is higher than the amount requested */ function validateNativeBalance(uint256 amount) internal view { if (getBalance(DefinitiveConstants.NATIVE_ASSET_ADDRESS) < amount) { revert InsufficientBalance(); } } /** * @dev internal function to validate balance is higher than the amount requested for a token */ function validateERC20Balance(address token, uint256 amount) internal view onlyValidERC20(token) { if (getBalance(token) < amount) { revert InsufficientBalance(); } } function validateAmount(uint256 _amount) internal pure { if (_amount == 0) { revert InvalidAmount(); } } }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; /** * @notice Contains constants used throughout the Definitive contracts * @dev This file should only be used as an internal library. */ library DefinitiveConstants { /** * @notice Maximum fee percentage */ uint256 internal constant MAX_FEE_PCT = 10000; /** * @notice Address to signify native assets */ address internal constant NATIVE_ASSET_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /** * @notice Maximum number of swaps allowed per block */ uint8 internal constant MAX_SWAPS_PER_BLOCK = 25; }
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.18; /** * @notice Contains all errors used throughout the Definitive contracts * @dev This file should only be used as an internal library. * @dev When adding a new error, add alphabetically */ error AccountMissingRole(address _account, bytes32 _role); error AccountNotAdmin(address); error AccountNotWhitelisted(address); error AddLiquidityFailed(); error EnterAllFailed(); error ExceededMaxDelta(); error ExceededMaxLTV(); error ExitAllFailed(); error ExitOneCoinFailed(); error InputGreaterThanStaked(); error InsufficientBalance(); error InsufficientSwapTokenBalance(); error InvalidAmount(); error InvalidAmounts(); error InvalidCalldata(); error InvalidERC20Address(); error InvalidExecutedOutputAmount(); error InvalidFeePercent(); error InvalidFlashLoanToken(address); error InvalidHandler(); error InvalidInputs(); error InvalidMsgValue(); error InvalidSingleHopSwap(); error InvalidMultiHopSwap(); error InvalidOutputToken(); error InvalidRedemptionRecipient(); // Used in cross-chain redeptions error InvalidReportedOutputAmount(); error InvalidSwapHandler(); error InvalidSwapInputAmount(); error InvalidSwapOutputToken(); error InvalidSwapPath(); error InvalidSwapPayload(); error InvalidSwapToken(); error NativeAssetWrapFailed(bool wrappingToNative); error RemoveLiquidityFailed(); error SlippageExceeded(uint256 _outputAmount, uint256 _outputAmountMin); error StakeFailed(); error StopGuardianEnabled(); error SwapDeadlineExceeded(); error SwapLimitExceeded(); error SwapTokenIsOutputToken(); error UnstakeFailed(); error UnauthenticatedFlashloan(); error UntrustedFlashLoanSender(address); error SafeHarborModeEnabled();
// SPDX-License-Identifier: UNLICENSED pragma solidity >=0.8.4; import { ICoreSwapHandlerV1 } from "../../core/CoreSwapHandler/ICoreSwapHandlerV1.sol"; interface IZeroExAdapterStructs { struct ZeroExSwapParams { uint256 deadline; bytes swapData; } /// @dev Needed for core function decodeParams(bytes memory data) external pure returns (ZeroExSwapParams memory); struct BatchFillData { address inputToken; address outputToken; uint256 sellAmount; WrappedBatchCall[] calls; } struct WrappedBatchCall { bytes4 selector; uint256 sellAmount; bytes data; } struct MultiHopFillData { address[] tokens; uint256 sellAmount; WrappedMultiHopCall[] calls; } struct WrappedMultiHopCall { bytes4 selector; bytes data; } } interface IZeroExSwapHandler is ICoreSwapHandlerV1 {}
// SPDX-License-Identifier: Apache License pragma solidity >=0.8.4; import { CallUtils } from "../../tools/BubbleReverts/BubbleReverts.sol"; import { IZeroExAdapterStructs } from "../../handlers/ZeroExSwapHandler/IZeroExSwapHandler.sol"; /** * @title ZeroExApiAdapter * @author Set Protocol * * Exchange adapter for 0xAPI that returns data for swaps */ abstract contract ZeroExApiAdapter is IZeroExAdapterStructs { /* ============ State Variables ============ */ // ETH pseudo-token address used by 0x API. address private constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // Byte size of Uniswap V3 encoded path addresses and pool fees uint256 private constant UNISWAP_V3_PATH_ADDRESS_SIZE = 20; uint256 private constant UNISWAP_V3_PATH_FEE_SIZE = 3; // Minimum byte size of a single hop Uniswap V3 encoded path (token address + fee + token adress) uint256 private constant UNISWAP_V3_SINGLE_HOP_PATH_SIZE = UNISWAP_V3_PATH_ADDRESS_SIZE + UNISWAP_V3_PATH_FEE_SIZE + UNISWAP_V3_PATH_ADDRESS_SIZE; // Byte size of one hop in the Uniswap V3 encoded path (token address + fee) uint256 private constant UNISWAP_V3_SINGLE_HOP_OFFSET_SIZE = UNISWAP_V3_PATH_ADDRESS_SIZE + UNISWAP_V3_PATH_FEE_SIZE; // Address of the deployed ZeroEx contract. address public immutable zeroExAddress; // Address of the WETH9 contract. address public immutable wethAddress; // Returns the address to approve source tokens to for trading. This is the TokenTaker address address public immutable getSpender; /* ============ constructor ============ */ constructor(address _zeroExAddress, address _wethAddress) { zeroExAddress = _zeroExAddress; wethAddress = _wethAddress; getSpender = _zeroExAddress; } /* ============ External Getter Functions ============ */ /** * Return 0xAPI calldata which is already generated from 0xAPI * * @param _sourceToken Address of source token to be sold * @param _destinationToken Address of destination token to buy * @param _destinationAddress Address that assets should be transferred to * @param _sourceQuantity Amount of source token to sell * @param _minDestinationQuantity Min amount of destination token to buy * @param _data Arbitrage bytes containing trade call data */ // solhint-disable-next-line code-complexity function _validateZeroExPayload( address _sourceToken, address _destinationToken, address _destinationAddress, uint256 _sourceQuantity, uint256 _minDestinationQuantity, bytes memory _data ) internal view { address inputToken; address outputToken; address recipient; bool supportsRecipient; uint256 inputTokenAmount; uint256 minOutputTokenAmount; require(_data.length >= 4, "Invalid calldata"); { bytes4 selector; bytes memory data; // solhint-disable-next-line no-inline-assembly assembly { selector := mload(add(_data, 0x20)) // Load the first 4 bytes let dataLength := sub(mload(_data), 4) // Calculate the length of the data data := mload(0x40) // Get the free memory pointer mstore(0x40, add(data, add(dataLength, 0x20))) // Update the free memory pointer mstore(data, dataLength) // Store the length of the data at the beginning of the data memory // Copy the data (excluding the selector) to the allocated memory mstore(add(data, 0x20), shr(32, mload(add(_data, 0x24)))) } if (selector == 0x415565b0) { // transformERC20() (inputToken, outputToken, inputTokenAmount, minOutputTokenAmount) = abi.decode( data, (address, address, uint256, uint256) ); } else if (selector == 0xf7fcd384) { // sellToLiquidityProvider() (inputToken, outputToken, , recipient, inputTokenAmount, minOutputTokenAmount) = abi.decode( data, (address, address, address, address, uint256, uint256) ); supportsRecipient = true; if (recipient == address(0)) { recipient = _destinationAddress; } } else if (selector == 0xd9627aa4) { // sellToUniswap() address[] memory path; (path, inputTokenAmount, minOutputTokenAmount) = abi.decode(data, (address[], uint256, uint256)); require(path.length > 1, "Uniswap token path too short"); inputToken = path[0]; outputToken = path[path.length - 1]; } else if (selector == 0xafc6728e) { // batchFill() BatchFillData memory fillData; (fillData, minOutputTokenAmount) = abi.decode(data, (BatchFillData, uint256)); inputToken = fillData.inputToken; outputToken = fillData.outputToken; inputTokenAmount = fillData.sellAmount; } else if (selector == 0x21c184b6) { // multiHopFill() MultiHopFillData memory fillData; (fillData, minOutputTokenAmount) = abi.decode(data, (MultiHopFillData, uint256)); require(fillData.tokens.length > 1, "Multihop token path too short"); inputToken = fillData.tokens[0]; outputToken = fillData.tokens[fillData.tokens.length - 1]; inputTokenAmount = fillData.sellAmount; } else if (selector == 0x6af479b2) { // sellTokenForTokenToUniswapV3() bytes memory encodedPath; (encodedPath, inputTokenAmount, minOutputTokenAmount, recipient) = abi.decode( data, (bytes, uint256, uint256, address) ); supportsRecipient = true; if (recipient == address(0)) { recipient = _destinationAddress; } (inputToken, outputToken) = _decodeTokensFromUniswapV3EncodedPath(encodedPath); } else if (selector == 0x803ba26d) { // sellTokenForEthToUniswapV3() bytes memory encodedPath; (encodedPath, inputTokenAmount, minOutputTokenAmount, recipient) = abi.decode( data, (bytes, uint256, uint256, address) ); supportsRecipient = true; if (recipient == address(0)) { recipient = _destinationAddress; } (inputToken, outputToken) = _decodeTokensFromUniswapV3EncodedPath(encodedPath); require(outputToken == wethAddress, "Last token must be WETH"); outputToken = ETH_ADDRESS; } else if (selector == 0x3598d8ab) { // sellEthForTokenToUniswapV3() inputTokenAmount = _sourceQuantity; bytes memory encodedPath; (encodedPath, minOutputTokenAmount, recipient) = abi.decode(data, (bytes, uint256, address)); supportsRecipient = true; if (recipient == address(0)) { recipient = _destinationAddress; } (inputToken, outputToken) = _decodeTokensFromUniswapV3EncodedPath(encodedPath); require(inputToken == wethAddress, "First token must be WETH"); inputToken = ETH_ADDRESS; } else { revert("Unsupported 0xAPI function selector"); } } require(inputToken == _sourceToken, "Mismatched input token"); require(outputToken == _destinationToken, "Mismatched output token"); require(!supportsRecipient || recipient == _destinationAddress, "Mismatched recipient"); require(inputTokenAmount == _sourceQuantity, "Mismatched input token quantity"); require(minOutputTokenAmount >= _minDestinationQuantity, "Mismatched output token quantity"); } // Decode input and output tokens from an arbitrary length encoded Uniswap V3 path function _decodeTokensFromUniswapV3EncodedPath( bytes memory encodedPath ) private pure returns (address inputToken, address outputToken) { require(encodedPath.length >= UNISWAP_V3_SINGLE_HOP_PATH_SIZE, "UniswapV3 token path too short"); // UniswapV3 paths are packed encoded as (address(token0), uint24(fee), address(token1), [...]) // We want the first and last token. uint256 numHops = (encodedPath.length - UNISWAP_V3_PATH_ADDRESS_SIZE) / UNISWAP_V3_SINGLE_HOP_OFFSET_SIZE; uint256 lastTokenOffset = numHops * UNISWAP_V3_SINGLE_HOP_OFFSET_SIZE; // solhint-disable-next-line no-inline-assembly assembly { let p := add(encodedPath, 32) inputToken := shr(96, mload(p)) p := add(p, lastTokenOffset) outputToken := shr(96, mload(p)) } } }
// SPDX-License-Identifier: AGPLv3 pragma solidity >=0.8.18; import { InvalidCalldata } from "../../core/libraries/DefinitiveErrors.sol"; /** * @title Call utilities library that is absent from the OpenZeppelin * @author Superfluid * Forked from * https://github.com/superfluid-finance/protocol-monorepo/blob * /d473b4876a689efb3bbb05552040bafde364a8b2/packages/ethereum-contracts/contracts/libs/CallUtils.sol * (Separated by 2 lines to prevent going over 120 character per line limit) */ library CallUtils { /// @dev Bubble up the revert from the returnedData (supports Panic, Error & Custom Errors) /// @notice This is needed in order to provide some human-readable revert message from a call /// @param returnedData Response of the call function revertFromReturnedData(bytes memory returnedData) internal pure { if (returnedData.length < 4) { // case 1: catch all revert("CallUtils: target revert()"); } else { bytes4 errorSelector; // solhint-disable-next-line no-inline-assembly assembly { errorSelector := mload(add(returnedData, 0x20)) } if (errorSelector == bytes4(0x4e487b71) /* `seth sig "Panic(uint256)"` */) { // case 2: Panic(uint256) (Defined since 0.8.0) // solhint-disable-next-line max-line-length // ref: https://docs.soliditylang.org/en/v0.8.0/control-structures.html#panic-via-assert-and-error-via-require) string memory reason = "CallUtils: target panicked: 0x__"; uint errorCode; // solhint-disable-next-line no-inline-assembly assembly { errorCode := mload(add(returnedData, 0x24)) let reasonWord := mload(add(reason, 0x20)) // [0..9] is converted to ['0'..'9'] // [0xa..0xf] is not correctly converted to ['a'..'f'] // but since panic code doesn't have those cases, we will ignore them for now! let e1 := add(and(errorCode, 0xf), 0x30) let e2 := shl(8, add(shr(4, and(errorCode, 0xf0)), 0x30)) reasonWord := or( and(reasonWord, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff0000), or(e2, e1) ) mstore(add(reason, 0x20), reasonWord) } revert(reason); } else { // case 3: Error(string) (Defined at least since 0.7.0) // case 4: Custom errors (Defined since 0.8.0) uint len = returnedData.length; // solhint-disable-next-line no-inline-assembly assembly { revert(add(returnedData, 32), len) } } } } /** * @dev Helper method to parse data and extract the method signature (selector). * * Copied from: https://github.com/argentlabs/argent-contracts/ * blob/master/contracts/modules/common/Utils.sol#L54-L60 */ function parseSelector(bytes memory callData) internal pure returns (bytes4 selector) { if (callData.length < 4) { revert InvalidCalldata(); } // solhint-disable-next-line no-inline-assembly assembly { selector := mload(add(callData, 0x20)) } } /** * @dev Pad length to 32 bytes word boundary */ function padLength32(uint256 len) internal pure returns (uint256 paddedLen) { return ((len / 32) + (((len & 31) > 0) /* rounding? */ ? 1 : 0)) * 32; } /** * @dev Validate if the data is encoded correctly with abi.encode(bytesData) * * Expected ABI Encode Layout: * | word 1 | word 2 | word 3 | the rest... * | data length | bytesData offset | bytesData length | bytesData + padLength32 zeros | */ function isValidAbiEncodedBytes(bytes memory data) internal pure returns (bool) { if (data.length < 64) return false; uint bytesOffset; uint bytesLen; // bytes offset is always expected to be 32 // solhint-disable-next-line no-inline-assembly assembly { bytesOffset := mload(add(data, 32)) } if (bytesOffset != 32) return false; // solhint-disable-next-line no-inline-assembly assembly { bytesLen := mload(add(data, 64)) } // the data length should be bytesData.length + 64 + padded bytes length return data.length == 64 + padLength32(bytesLen); } }
// 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: AGPL-3.0-only pragma solidity >=0.8.0; import {ERC20} from "../tokens/ERC20.sol"; /// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values. /// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol) /// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer. /// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller. library SafeTransferLib { /*////////////////////////////////////////////////////////////// ETH OPERATIONS //////////////////////////////////////////////////////////////*/ function safeTransferETH(address to, uint256 amount) internal { bool success; /// @solidity memory-safe-assembly assembly { // Transfer the ETH and store if it succeeded or not. success := call(gas(), to, amount, 0, 0, 0, 0) } require(success, "ETH_TRANSFER_FAILED"); } /*////////////////////////////////////////////////////////////// ERC20 OPERATIONS //////////////////////////////////////////////////////////////*/ function safeTransferFrom( ERC20 token, address from, address to, uint256 amount ) internal { bool success; /// @solidity memory-safe-assembly assembly { // Get a pointer to some free memory. let freeMemoryPointer := mload(0x40) // Write the abi-encoded calldata into memory, beginning with the function selector. mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000) mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument. mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument. mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument. success := and( // Set success to whether the call reverted, if not we check it either // returned exactly 1 (can't just be non-zero data), or had no return data. or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())), // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3. // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space. // Counterintuitively, this call must be positioned second to the or() call in the // surrounding and() call or else returndatasize() will be zero during the computation. call(gas(), token, 0, freeMemoryPointer, 100, 0, 32) ) } require(success, "TRANSFER_FROM_FAILED"); } function safeTransfer( ERC20 token, address to, uint256 amount ) internal { bool success; /// @solidity memory-safe-assembly assembly { // Get a pointer to some free memory. let freeMemoryPointer := mload(0x40) // Write the abi-encoded calldata into memory, beginning with the function selector. mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000) mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument. mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. success := and( // Set success to whether the call reverted, if not we check it either // returned exactly 1 (can't just be non-zero data), or had no return data. or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())), // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2. // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space. // Counterintuitively, this call must be positioned second to the or() call in the // surrounding and() call or else returndatasize() will be zero during the computation. call(gas(), token, 0, freeMemoryPointer, 68, 0, 32) ) } require(success, "TRANSFER_FAILED"); } function safeApprove( ERC20 token, address to, uint256 amount ) internal { bool success; /// @solidity memory-safe-assembly assembly { // Get a pointer to some free memory. let freeMemoryPointer := mload(0x40) // Write the abi-encoded calldata into memory, beginning with the function selector. mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000) mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument. mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument. success := and( // Set success to whether the call reverted, if not we check it either // returned exactly 1 (can't just be non-zero data), or had no return data. or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())), // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2. // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space. // Counterintuitively, this call must be positioned second to the or() call in the // surrounding and() call or else returndatasize() will be zero during the computation. call(gas(), token, 0, freeMemoryPointer, 68, 0, 32) ) } require(success, "APPROVE_FAILED"); } }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 850 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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)
000000000000000000000000def1c0ded9bec7f1a1670819833240f027b25eff000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
-----Decoded View---------------
Arg [0] : _zeroExProxy (address): 0xDef1C0ded9bec7F1a1670819833240f027b25EfF
Arg [1] : _wethAddress (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000def1c0ded9bec7f1a1670819833240f027b25eff
Arg [1] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
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Multichain Portfolio | 26 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.