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Latest 15 from a total of 15 transactions
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Set New Governan... | 18847996 | 192 days ago | IN | 0 ETH | 0.00055365 | ||||
Withdraw | 18370160 | 259 days ago | IN | 0.00488285 ETH | 0.00473712 | ||||
Withdraw | 18362765 | 260 days ago | IN | 0.00436764 ETH | 0.00430393 | ||||
Deposit | 18362719 | 260 days ago | IN | 0 ETH | 0.00750422 | ||||
Withdraw | 18339427 | 263 days ago | IN | 0 ETH | 0.00385619 | ||||
Deposit | 18339421 | 263 days ago | IN | 0 ETH | 0.00549213 | ||||
Withdraw | 18339412 | 263 days ago | IN | 0 ETH | 0.00229353 | ||||
Withdraw | 18339342 | 263 days ago | IN | 0.00394787 ETH | 0.00410893 | ||||
Deposit | 18339335 | 263 days ago | IN | 0 ETH | 0.00579081 | ||||
Withdraw | 18339313 | 263 days ago | IN | 0 ETH | 0.00232494 | ||||
Withdraw | 18332191 | 264 days ago | IN | 0.00419599 ETH | 0.00405886 | ||||
Withdraw | 18331529 | 264 days ago | IN | 0.00418061 ETH | 0.00448383 | ||||
Withdraw | 18331513 | 264 days ago | IN | 0 ETH | 0.00236751 | ||||
Set Tornado Tree... | 18323534 | 266 days ago | IN | 0 ETH | 0.00034147 | ||||
0x60806040 | 18323520 | 266 days ago | IN | Create: PGRouter | 0 ETH | 0.01135663 |
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Contract Name:
PGRouter
Compiler Version
v0.8.14+commit.80d49f37
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.14; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/utils/math/Math.sol"; import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; import "./RelayerRegistry.sol"; import "./InstanceRegistry.sol"; import "../interfaces/ITornadoInstance.sol"; import "../tornado-core/Tornado.sol"; import "../interfaces/ITornadoTrees.sol"; contract PGRouter is Initializable { using SafeERC20 for IERC20; event EncryptedNote(address indexed sender, bytes encryptedNote); event TornadoTreesUpdated(ITornadoTrees addr); event NewGovernanceAddressUpdated(address newGovernanceAddress); address public governance; InstanceRegistry public instanceRegistry; RelayerRegistry public relayerRegistry; ITornadoTrees public tornadoTrees; modifier onlyGovernance() { require(msg.sender == governance, "Not authorized"); _; } modifier onlyInstanceRegistry() { require(msg.sender == address(instanceRegistry), "Not authorized"); _; } constructor(address _tornadoTrees, address _governance, address _instanceRegistry, address _relayerRegistry) { tornadoTrees = ITornadoTrees(_tornadoTrees); governance = _governance; instanceRegistry = InstanceRegistry(_instanceRegistry); relayerRegistry = RelayerRegistry(_relayerRegistry); } /** @notice For proxy pattern */ function initialize( address _tornadoTrees, address _governance, address _instanceRegistry, address _relayerRegistry ) public initializer { tornadoTrees = ITornadoTrees(_tornadoTrees); governance = _governance; instanceRegistry = InstanceRegistry(_instanceRegistry); relayerRegistry = RelayerRegistry(_relayerRegistry); } /** @notice Deposit funds into the contract. @param _tornado PortralGate pool instance address @param _commitment the note commitment, which is PedersenHash(nullifier + secret) @param _encryptedNote the encrypted note @param sender the sender address (used in cases when the sender is not the caller e.g. zapper contract) */ function deposit( ITornadoInstance _tornado, bytes32 _commitment, bytes memory _encryptedNote, address sender ) public payable virtual { (bool isERC20, IERC20 token, InstanceRegistry.InstanceState state, , , uint256 maxDepositAmount) = instanceRegistry.instances( _tornado ); require(state != InstanceRegistry.InstanceState.DISABLED, "The instance is not supported"); require(token.balanceOf(address(_tornado)) < maxDepositAmount, "Exceed deposit Cap for the pool"); if (isERC20) { token.safeTransferFrom(msg.sender, address(this), _tornado.denomination()); } _tornado.deposit{ value: msg.value }(_commitment); if (state == InstanceRegistry.InstanceState.MINABLE) { tornadoTrees.registerDeposit(address(_tornado), _commitment); } emit EncryptedNote(sender, _encryptedNote); } /** @notice Withdraw a deposit from the contract. Relayer withdrawn should have different _relayer and _recipient addresses. @param _tornado TC pool instance address @param _proof is a zkSNARK proof data, and input is an array of circuit public inputs `input` array @param _root merkle root of all deposits in the contract @param _nullifierHash hash of unique deposit nullifier to prevent double spends @param _recipient the recipient address to recieve the token @param _relayer the relayer address @param _fee the token amount sent to relayer as fee @param _refund the eth amount sent to recipient as gas */ function withdraw( ITornadoInstance _tornado, bytes calldata _proof, bytes32 _root, bytes32 _nullifierHash, address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund ) public payable virtual { (, , InstanceRegistry.InstanceState state, , , ) = instanceRegistry.instances(_tornado); require(state != InstanceRegistry.InstanceState.DISABLED, "The instance is not supported"); if (_relayer != _recipient) { require(relayerRegistry.isRelayerRegistered(_relayer) && msg.sender == _relayer, "Invalid Relayer."); } _tornado.withdraw{ value: msg.value }(_proof, _root, _nullifierHash, _recipient, _relayer, _fee, _refund); if (state == InstanceRegistry.InstanceState.MINABLE) { tornadoTrees.registerWithdrawal(address(_tornado), _nullifierHash); } } /** @dev Sets `amount` allowance of `_spender` over the router's (this contract) tokens. */ function approveExactToken(IERC20 _token, address _spender, uint256 _amount) external onlyInstanceRegistry { _token.safeApprove(_spender, _amount); } /** @notice Manually backup encrypted notes */ function backupNotes(bytes[] calldata _encryptedNotes) external virtual { for (uint256 i = 0; i < _encryptedNotes.length; i++) { emit EncryptedNote(msg.sender, _encryptedNotes[i]); } } /** @dev Update new tornado tree instance. @param _tornadoTrees new tornado tree instance address */ function setTornadoTreesContract(ITornadoTrees _tornadoTrees) external virtual onlyGovernance { tornadoTrees = _tornadoTrees; emit TornadoTreesUpdated(_tornadoTrees); } /** @notice Set new governance address. @param _govAddr new governance address */ function setNewGovernance(address _govAddr) external onlyGovernance { require(_govAddr != address(0), "Empty governance address."); governance = _govAddr; emit NewGovernanceAddressUpdated(_govAddr); } /// @dev Method to claim junk and accidentally sent tokens function rescueTokens(IERC20 _token, address payable _to, uint256 _amount) external virtual onlyGovernance { require(_to != address(0), "PG: can not send to zero address"); if (address(_token) == address(0)) { // for Ether uint256 totalBalance = address(this).balance; uint256 balance = Math.min(totalBalance, _amount); (bool sent, ) = _to.call{ value: balance }(""); require(sent, "Failed to send Ether"); } else { // any other erc20 uint256 totalBalance = _token.balanceOf(address(this)); uint256 balance = Math.min(totalBalance, _amount); require(balance > 0, "PG: trying to send 0 balance"); _token.safeTransfer(_to, balance); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ```solidity * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized != type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
// 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 AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// 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/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: 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 (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 pragma solidity ^0.8.0; interface IHasher { function poseidon(bytes32[2] calldata inputs) external pure returns (bytes32); function poseidon(bytes32[3] calldata inputs) external pure returns (bytes32); function MiMCSponge( uint256 in_xL, uint256 in_xR ) external pure returns (uint256 xL, uint256 xR); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface ITornadoInstance { function token() external view returns (address); function denomination() external view returns (uint256); function deposit(bytes32 commitment) external payable; function withdraw( bytes calldata proof, bytes32 root, bytes32 nullifierHash, address payable recipient, address payable relayer, uint256 fee, uint256 refund ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface ITornadoTrees { function registerDeposit(address instance, bytes32 commitment) external; function registerWithdrawal(address instance, bytes32 nullifier) external; }
// SPDX-License-Identifier: MIT pragma solidity 0.8.14; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "../interfaces/ITornadoInstance.sol"; import "./PGRouter.sol"; contract InstanceRegistry { using SafeERC20 for IERC20; enum InstanceState { DISABLED, ENABLED, // is enabled but mining is disabled MINABLE // is enabled and mining is enabled } struct Instance { bool isERC20; IERC20 token; InstanceState state; // the fee of the uniswap pool which will be used to get a TWAP uint24 uniswapPoolSwappingFee; // the fee the protocol takes from relayer, it should be multiplied by PROTOCOL_FEE_DIVIDER from FeeManager.sol uint32 protocolFeePercentage; uint256 maxDepositAmount; } struct TornadoConfig { ITornadoInstance addr; Instance instance; } uint256 public MAX_FEE = 30; address public governance; PGRouter public router; mapping(ITornadoInstance => Instance) public instances; ITornadoInstance[] public instanceIds; event InstanceStateUpdated(ITornadoInstance indexed instance, InstanceState state); event RouterRegistered(address pgRouter); event NewGovernanceAddressUpdated(address newGovernanceAddress); modifier onlyGovernance() { require(msg.sender == governance, "Not authorized"); _; } constructor(address _governance) { governance = _governance; } /** * @dev initialise a set of tornado instances. */ function initInstances(TornadoConfig[] memory _instances) external onlyGovernance { for (uint256 i = 0; i < _instances.length; i++) { _updateInstance(_instances[i]); instanceIds.push(_instances[i].addr); } } /** * @dev Update an instance state. */ function updateInstanceState(ITornadoInstance _addr, InstanceState _state) external virtual onlyGovernance { Instance storage _instance = instances[_addr]; _instance.state = _state; emit InstanceStateUpdated(_addr, _state); } /** * @dev Add or update an instance. */ function updateInstance(TornadoConfig calldata _tornadoConf) external virtual onlyGovernance { require(_tornadoConf.instance.state != InstanceState.DISABLED, "Use removeInstance() for remove"); Instance memory _inst = instances[_tornadoConf.addr]; if (_inst.state == InstanceState.DISABLED && address(_inst.token) == address(0) && _inst.maxDepositAmount == 0) { // make sure it's a new instance. instanceIds.push(_tornadoConf.addr); } _updateInstance(_tornadoConf); } /** * @dev Remove an instance. * @param _instanceId The instance id in `instanceIds` mapping to remove. */ function removeInstance(uint256 _instanceId) external virtual onlyGovernance { ITornadoInstance _instance = instanceIds[_instanceId]; (bool isERC20, IERC20 token) = (instances[_instance].isERC20, instances[_instance].token); if (isERC20) { uint256 allowance = token.allowance(address(router), address(_instance)); if (allowance != 0) { router.approveExactToken(token, address(_instance), 0); } } delete instances[_instance]; instanceIds[_instanceId] = instanceIds[instanceIds.length - 1]; instanceIds.pop(); emit InstanceStateUpdated(_instance, InstanceState.DISABLED); } /** * @notice This function should allow governance to set a new protocol fee for relayers * @param instance the to update * @param newFee the new fee to use * */ function setProtocolFee(ITornadoInstance instance, uint32 newFee) external onlyGovernance { require(address(instance) != address(0), "Empty Instance."); require(address(instances[instance].token) != address(0), "Instance Token is Empty."); require(newFee <= MAX_FEE, "NewFee exceed MaxFee."); instances[instance].protocolFeePercentage = newFee; } /** * @notice This function should allow governance to set a new tornado proxy address * @param routerAddress address of the new proxy * */ function setPGRouter(address routerAddress) external onlyGovernance { router = PGRouter(routerAddress); emit RouterRegistered(routerAddress); } function _updateInstance(TornadoConfig memory _tornadoConf) internal virtual { instances[_tornadoConf.addr] = _tornadoConf.instance; if (_tornadoConf.instance.isERC20) { IERC20 token = IERC20(_tornadoConf.addr.token()); require(token == _tornadoConf.instance.token, "Incorrect token"); uint256 allowance = token.allowance(address(router), address(_tornadoConf.addr)); if (allowance == 0) { router.approveExactToken(token, address(_tornadoConf.addr), type(uint256).max); } } emit InstanceStateUpdated(_tornadoConf.addr, _tornadoConf.instance.state); } /** * @dev Returns all instance configs */ function getAllInstances() public view returns (TornadoConfig[] memory result) { result = new TornadoConfig[](instanceIds.length); for (uint256 i = 0; i < instanceIds.length; i++) { ITornadoInstance _instance = instanceIds[i]; result[i] = TornadoConfig({ addr: _instance, instance: instances[_instance] }); } } /** * @notice Set new governance address. * @param _govAddr new governance address */ function setNewGovernance(address _govAddr) external onlyGovernance { require(_govAddr != address(0), "Empty governance address."); governance = _govAddr; emit NewGovernanceAddressUpdated(_govAddr); } /** * @dev Returns all instance addresses */ function getAllInstanceAddresses() public view returns (ITornadoInstance[] memory result) { result = new ITornadoInstance[](instanceIds.length); for (uint256 i = 0; i < instanceIds.length; i++) { result[i] = instanceIds[i]; } } /** * @notice get erc20 tornado instance token * @param instance the interface (contract) key to the instance data */ function getPoolToken(ITornadoInstance instance) external view returns (address) { return address(instances[instance].token); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.14; import "@openzeppelin/contracts/access/Ownable.sol"; contract RelayerRegistry is Ownable { mapping(address => bool) public isRelayer; event RelayerAdded(address indexed relayer); event RelayerRemoved(address indexed relayer); /** @dev Add a new relayer. @param _relayer A new relayer address */ function add(address _relayer) public onlyOwner { require(!isRelayer[_relayer], "The relayer already exists"); isRelayer[_relayer] = true; emit RelayerAdded(_relayer); } /** @dev Remove a new relayer. @param _relayer A new relayer address to remove */ function remove(address _relayer) public onlyOwner { require(isRelayer[_relayer], "The relayer does not exist"); isRelayer[_relayer] = false; emit RelayerRemoved(_relayer); } /** @dev Check address intance is a relayer? @param _relayer A relayer address to check @return true or false */ function isRelayerRegistered(address _relayer) external view returns (bool) { return isRelayer[_relayer]; } }
// https://tornado.cash /* * d888888P dP a88888b. dP * 88 88 d8' `88 88 * 88 .d8888b. 88d888b. 88d888b. .d8888b. .d888b88 .d8888b. 88 .d8888b. .d8888b. 88d888b. * 88 88' `88 88' `88 88' `88 88' `88 88' `88 88' `88 88 88' `88 Y8ooooo. 88' `88 * 88 88. .88 88 88 88 88. .88 88. .88 88. .88 dP Y8. .88 88. .88 88 88 88 * dP `88888P' dP dP dP `88888P8 `88888P8 `88888P' 88 Y88888P' `88888P8 `88888P' dP dP * ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo */ import "../interfaces/IHasher.sol"; // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract MerkleTreeWithHistory { uint256 public constant FIELD_SIZE = 21888242871839275222246405745257275088548364400416034343698204186575808495617; uint256 public constant ZERO_VALUE = 21663839004416932945382355908790599225266501822907911457504978515578255421292; // = keccak256("tornado") % FIELD_SIZE IHasher public immutable hasher; uint32 public levels; // the following variables are made public for easier testing and debugging and // are not supposed to be accessed in regular code // filledSubtrees and roots could be bytes32[size], but using mappings makes it cheaper because // it removes index range check on every interaction mapping(uint256 => bytes32) public filledSubtrees; mapping(uint256 => bytes32) public roots; uint32 public constant ROOT_HISTORY_SIZE = 30; uint32 public currentRootIndex = 0; uint32 public nextIndex = 0; constructor(uint32 _levels, IHasher _hasher) { require(_levels > 0, "_levels should be greater than zero"); require(_levels < 32, "_levels should be less than 32"); levels = _levels; hasher = _hasher; for (uint32 i = 0; i < _levels; i++) { filledSubtrees[i] = zeros(i); } roots[0] = zeros(_levels - 1); } /** @dev Hash 2 tree leaves, returns MiMC(_left, _right) */ function hashLeftRight( IHasher _hasher, bytes32 _left, bytes32 _right ) public pure returns (bytes32) { require( uint256(_left) < FIELD_SIZE, "_left should be inside the field" ); require( uint256(_right) < FIELD_SIZE, "_right should be inside the field" ); uint256 R = uint256(_left); uint256 C = 0; (R, C) = _hasher.MiMCSponge(R, C); R = addmod(R, uint256(_right), FIELD_SIZE); (R, C) = _hasher.MiMCSponge(R, C); return bytes32(R); } function _insert(bytes32 _leaf) internal returns (uint32 index) { uint32 _nextIndex = nextIndex; require( _nextIndex != uint32(2) ** levels, "Merkle tree is full. No more leaves can be added" ); uint32 currentIndex = _nextIndex; bytes32 currentLevelHash = _leaf; bytes32 left; bytes32 right; for (uint32 i = 0; i < levels; i++) { if (currentIndex % 2 == 0) { left = currentLevelHash; right = zeros(i); filledSubtrees[i] = currentLevelHash; } else { left = filledSubtrees[i]; right = currentLevelHash; } currentLevelHash = hashLeftRight(hasher, left, right); currentIndex /= 2; } uint32 newRootIndex = (currentRootIndex + 1) % ROOT_HISTORY_SIZE; currentRootIndex = newRootIndex; roots[newRootIndex] = currentLevelHash; nextIndex = _nextIndex + 1; return _nextIndex; } /** @dev Whether the root is present in the root history */ function isKnownRoot(bytes32 _root) public view returns (bool) { if (_root == 0) { return false; } uint32 _currentRootIndex = currentRootIndex; uint32 i = _currentRootIndex; do { if (_root == roots[i]) { return true; } if (i == 0) { i = ROOT_HISTORY_SIZE; } i--; } while (i != _currentRootIndex); return false; } /** @dev Returns the last root */ function getLastRoot() public view returns (bytes32) { return roots[currentRootIndex]; } /// @dev provides Zero (Empty) elements for a MiMC MerkleTree. Up to 32 levels function zeros(uint256 i) public pure returns (bytes32) { if (i == 0) return bytes32( 0x2fe54c60d3acabf3343a35b6eba15db4821b340f76e741e2249685ed4899af6c ); else if (i == 1) return bytes32( 0x256a6135777eee2fd26f54b8b7037a25439d5235caee224154186d2b8a52e31d ); else if (i == 2) return bytes32( 0x1151949895e82ab19924de92c40a3d6f7bcb60d92b00504b8199613683f0c200 ); else if (i == 3) return bytes32( 0x20121ee811489ff8d61f09fb89e313f14959a0f28bb428a20dba6b0b068b3bdb ); else if (i == 4) return bytes32( 0x0a89ca6ffa14cc462cfedb842c30ed221a50a3d6bf022a6a57dc82ab24c157c9 ); else if (i == 5) return bytes32( 0x24ca05c2b5cd42e890d6be94c68d0689f4f21c9cec9c0f13fe41d566dfb54959 ); else if (i == 6) return bytes32( 0x1ccb97c932565a92c60156bdba2d08f3bf1377464e025cee765679e604a7315c ); else if (i == 7) return bytes32( 0x19156fbd7d1a8bf5cba8909367de1b624534ebab4f0f79e003bccdd1b182bdb4 ); else if (i == 8) return bytes32( 0x261af8c1f0912e465744641409f622d466c3920ac6e5ff37e36604cb11dfff80 ); else if (i == 9) return bytes32( 0x0058459724ff6ca5a1652fcbc3e82b93895cf08e975b19beab3f54c217d1c007 ); else if (i == 10) return bytes32( 0x1f04ef20dee48d39984d8eabe768a70eafa6310ad20849d4573c3c40c2ad1e30 ); else if (i == 11) return bytes32( 0x1bea3dec5dab51567ce7e200a30f7ba6d4276aeaa53e2686f962a46c66d511e5 ); else if (i == 12) return bytes32( 0x0ee0f941e2da4b9e31c3ca97a40d8fa9ce68d97c084177071b3cb46cd3372f0f ); else if (i == 13) return bytes32( 0x1ca9503e8935884501bbaf20be14eb4c46b89772c97b96e3b2ebf3a36a948bbd ); else if (i == 14) return bytes32( 0x133a80e30697cd55d8f7d4b0965b7be24057ba5dc3da898ee2187232446cb108 ); else if (i == 15) return bytes32( 0x13e6d8fc88839ed76e182c2a779af5b2c0da9dd18c90427a644f7e148a6253b6 ); else if (i == 16) return bytes32( 0x1eb16b057a477f4bc8f572ea6bee39561098f78f15bfb3699dcbb7bd8db61854 ); else if (i == 17) return bytes32( 0x0da2cb16a1ceaabf1c16b838f7a9e3f2a3a3088d9e0a6debaa748114620696ea ); else if (i == 18) return bytes32( 0x24a3b3d822420b14b5d8cb6c28a574f01e98ea9e940551d2ebd75cee12649f9d ); else if (i == 19) return bytes32( 0x198622acbd783d1b0d9064105b1fc8e4d8889de95c4c519b3f635809fe6afc05 ); else if (i == 20) return bytes32( 0x29d7ed391256ccc3ea596c86e933b89ff339d25ea8ddced975ae2fe30b5296d4 ); else if (i == 21) return bytes32( 0x19be59f2f0413ce78c0c3703a3a5451b1d7f39629fa33abd11548a76065b2967 ); else if (i == 22) return bytes32( 0x1ff3f61797e538b70e619310d33f2a063e7eb59104e112e95738da1254dc3453 ); else if (i == 23) return bytes32( 0x10c16ae9959cf8358980d9dd9616e48228737310a10e2b6b731c1a548f036c48 ); else if (i == 24) return bytes32( 0x0ba433a63174a90ac20992e75e3095496812b652685b5e1a2eae0b1bf4e8fcd1 ); else if (i == 25) return bytes32( 0x019ddb9df2bc98d987d0dfeca9d2b643deafab8f7036562e627c3667266a044c ); else if (i == 26) return bytes32( 0x2d3c88b23175c5a5565db928414c66d1912b11acf974b2e644caaac04739ce99 ); else if (i == 27) return bytes32( 0x2eab55f6ae4e66e32c5189eed5c470840863445760f5ed7e7b69b2a62600f354 ); else if (i == 28) return bytes32( 0x002df37a2642621802383cf952bf4dd1f32e05433beeb1fd41031fb7eace979d ); else if (i == 29) return bytes32( 0x104aeb41435db66c3e62feccc1d6f5d98d0a0ed75d1374db457cf462e3a1f427 ); else if (i == 30) return bytes32( 0x1f3c6fd858e9a7d4b0d1f38e256a09d81d5a5e3c963987e2d4b814cfab7c6ebb ); else if (i == 31) return bytes32( 0x2c7a07d20dff79d01fecedc1134284a8d08436606c93693b67e333f671bf69cc ); else revert("Index out of bounds"); } }
// https://tornado.cash /* * d888888P dP a88888b. dP * 88 88 d8' `88 88 * 88 .d8888b. 88d888b. 88d888b. .d8888b. .d888b88 .d8888b. 88 .d8888b. .d8888b. 88d888b. * 88 88' `88 88' `88 88' `88 88' `88 88' `88 88' `88 88 88' `88 Y8ooooo. 88' `88 * 88 88. .88 88 88 88 88. .88 88. .88 88. .88 dP Y8. .88 88. .88 88 88 88 * dP `88888P' dP dP dP `88888P8 `88888P8 `88888P' 88 Y88888P' `88888P8 `88888P' dP dP * ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo */ // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./MerkleTreeWithHistory.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; interface IVerifier { function verifyProof( bytes memory _proof, uint256[6] memory _input ) external returns (bool); } abstract contract Tornado is MerkleTreeWithHistory, ReentrancyGuard { IVerifier public immutable verifier; uint256 public denomination; mapping(bytes32 => bool) public nullifierHashes; // we store all commitments just to prevent accidental deposits with the same commitment mapping(bytes32 => bool) public commitments; event Deposit( bytes32 indexed commitment, uint32 leafIndex, uint256 timestamp ); event Withdrawal( address to, bytes32 nullifierHash, address indexed relayer, uint256 fee ); /** @dev The constructor @param _verifier the address of SNARK verifier for this contract @param _hasher the address of MiMC hash contract @param _denomination transfer amount for each deposit @param _merkleTreeHeight the height of deposits' Merkle Tree */ constructor( IVerifier _verifier, IHasher _hasher, uint256 _denomination, uint32 _merkleTreeHeight ) MerkleTreeWithHistory(_merkleTreeHeight, _hasher) { require(_denomination > 0, "denomination should be greater than 0"); verifier = _verifier; denomination = _denomination; } /** @dev Deposit funds into the contract. The caller must send (for ETH) or approve (for ERC20) value equal to or `denomination` of this instance. @param _commitment the note commitment, which is PedersenHash(nullifier + secret) */ function deposit(bytes32 _commitment) external payable nonReentrant { require(!commitments[_commitment], "The commitment has been submitted"); uint32 insertedIndex = _insert(_commitment); commitments[_commitment] = true; _processDeposit(); emit Deposit(_commitment, insertedIndex, block.timestamp); } /** @dev this function is defined in a child contract */ function _processDeposit() internal virtual; /** @dev Withdraw a deposit from the contract. `proof` is a zkSNARK proof data, and input is an array of circuit public inputs `input` array consists of: - merkle root of all deposits in the contract - hash of unique deposit nullifier to prevent double spends - the recipient of funds - optional fee that goes to the transaction sender (usually a relay) */ function withdraw( bytes calldata _proof, bytes32 _root, bytes32 _nullifierHash, address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund ) external payable nonReentrant { require(_fee <= denomination, "Fee exceeds transfer value"); require( !nullifierHashes[_nullifierHash], "The note has been already spent" ); require(isKnownRoot(_root), "Cannot find your merkle root"); // Make sure to use a recent one require(verifier.verifyProof(_proof, [uint256(_root), uint256(_nullifierHash), uint256(uint160(address(_recipient))), uint256(uint160(address(_relayer))), _fee, _refund]), "Invalid withdraw proof"); nullifierHashes[_nullifierHash] = true; _processWithdraw(_recipient, _relayer, _fee, _refund); emit Withdrawal(_recipient, _nullifierHash, _relayer, _fee); } /** @dev this function is defined in a child contract */ function _processWithdraw( address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund ) internal virtual; /** @dev whether a note is already spent */ function isSpent(bytes32 _nullifierHash) public view returns (bool) { return nullifierHashes[_nullifierHash]; } /** @dev whether an array of notes is already spent */ function isSpentArray( bytes32[] calldata _nullifierHashes ) external view returns (bool[] memory spent) { spent = new bool[](_nullifierHashes.length); for (uint256 i = 0; i < _nullifierHashes.length; i++) { if (isSpent(_nullifierHashes[i])) { spent[i] = true; } } } }
{ "evmVersion": "london", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 200 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"_tornadoTrees","type":"address"},{"internalType":"address","name":"_governance","type":"address"},{"internalType":"address","name":"_instanceRegistry","type":"address"},{"internalType":"address","name":"_relayerRegistry","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"bytes","name":"encryptedNote","type":"bytes"}],"name":"EncryptedNote","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newGovernanceAddress","type":"address"}],"name":"NewGovernanceAddressUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"contract ITornadoTrees","name":"addr","type":"address"}],"name":"TornadoTreesUpdated","type":"event"},{"inputs":[{"internalType":"contract IERC20","name":"_token","type":"address"},{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"approveExactToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"_encryptedNotes","type":"bytes[]"}],"name":"backupNotes","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ITornadoInstance","name":"_tornado","type":"address"},{"internalType":"bytes32","name":"_commitment","type":"bytes32"},{"internalType":"bytes","name":"_encryptedNote","type":"bytes"},{"internalType":"address","name":"sender","type":"address"}],"name":"deposit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"governance","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_tornadoTrees","type":"address"},{"internalType":"address","name":"_governance","type":"address"},{"internalType":"address","name":"_instanceRegistry","type":"address"},{"internalType":"address","name":"_relayerRegistry","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"instanceRegistry","outputs":[{"internalType":"contract InstanceRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"relayerRegistry","outputs":[{"internalType":"contract RelayerRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"_token","type":"address"},{"internalType":"address payable","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"rescueTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_govAddr","type":"address"}],"name":"setNewGovernance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract ITornadoTrees","name":"_tornadoTrees","type":"address"}],"name":"setTornadoTreesContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tornadoTrees","outputs":[{"internalType":"contract ITornadoTrees","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract ITornadoInstance","name":"_tornado","type":"address"},{"internalType":"bytes","name":"_proof","type":"bytes"},{"internalType":"bytes32","name":"_root","type":"bytes32"},{"internalType":"bytes32","name":"_nullifierHash","type":"bytes32"},{"internalType":"address payable","name":"_recipient","type":"address"},{"internalType":"address payable","name":"_relayer","type":"address"},{"internalType":"uint256","name":"_fee","type":"uint256"},{"internalType":"uint256","name":"_refund","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"payable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000005e92e534faa0c816fb449f95a29182978d47cf65000000000000000000000000a27bc61b39450b3e481859df96617dd50ec8dc1f000000000000000000000000941c2f20ca7e899efec1b0b502a51bd95ab7c206
-----Decoded View---------------
Arg [0] : _tornadoTrees (address): 0x0000000000000000000000000000000000000000
Arg [1] : _governance (address): 0x5e92e534fAa0c816fb449F95A29182978D47CF65
Arg [2] : _instanceRegistry (address): 0xA27bC61b39450b3e481859DF96617Dd50ec8dc1F
Arg [3] : _relayerRegistry (address): 0x941c2F20ca7E899EfeC1B0b502A51bd95ab7c206
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [1] : 0000000000000000000000005e92e534faa0c816fb449f95a29182978d47cf65
Arg [2] : 000000000000000000000000a27bc61b39450b3e481859df96617dd50ec8dc1f
Arg [3] : 000000000000000000000000941c2f20ca7e899efec1b0b502a51bd95ab7c206
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.