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Latest 25 from a total of 79,184 transactions
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Execute | 21463315 | 5 secs ago | IN | 0 ETH | 0.00035514 | ||||
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Execute | 21463214 | 20 mins ago | IN | 0 ETH | 0.00030854 | ||||
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Execute | 21463094 | 44 mins ago | IN | 0 ETH | 0.00035537 | ||||
Execute | 21463077 | 48 mins ago | IN | 0 ETH | 0.00033887 | ||||
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Execute | 21462731 | 1 hr ago | IN | 0 ETH | 0.00037381 | ||||
Execute | 21462693 | 2 hrs ago | IN | 0 ETH | 0.00034994 |
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Contract Name:
DVN
Compiler Version
v0.8.22+commit.4fc1097e
Optimization Enabled:
Yes with 20000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { ILayerZeroUltraLightNodeV2 } from "@layerzerolabs/lz-evm-v1-0.7/contracts/interfaces/ILayerZeroUltraLightNodeV2.sol"; import { Worker } from "../../Worker.sol"; import { MultiSig } from "./MultiSig.sol"; import { IDVN } from "../interfaces/IDVN.sol"; import { IDVNFeeLib } from "../interfaces/IDVNFeeLib.sol"; import { IReceiveUlnE2 } from "../interfaces/IReceiveUlnE2.sol"; struct ExecuteParam { uint32 vid; address target; bytes callData; uint256 expiration; bytes signatures; } contract DVN is Worker, MultiSig, IDVN { // to uniquely identify this DVN instance // set to endpoint v1 eid if available OR endpoint v2 eid % 30_000 uint32 public immutable vid; mapping(uint32 dstEid => DstConfig) public dstConfig; mapping(bytes32 executableHash => bool used) public usedHashes; error DVN_OnlySelf(); error DVN_InvalidRole(bytes32 role); error DVN_InstructionExpired(); error DVN_InvalidTarget(address target); error DVN_InvalidVid(uint32 vid); error DVN_InvalidSignatures(); error DVN_DuplicatedHash(bytes32 executableHash); event VerifySignaturesFailed(uint256 idx); event ExecuteFailed(uint256 _index, bytes _data); event HashAlreadyUsed(ExecuteParam param, bytes32 _hash); // same as DVNFeePaid, but for ULNv2 event VerifierFeePaid(uint256 fee); // ========================= Constructor ========================= /// @dev DVN doesn't have a roleAdmin (address(0x0)) /// @dev Supports all of ULNv2, ULN301, ULN302 and more /// @param _vid unique identifier for this DVN instance /// @param _messageLibs array of message lib addresses that are granted the MESSAGE_LIB_ROLE /// @param _priceFeed price feed address /// @param _signers array of signer addresses for multisig /// @param _quorum quorum for multisig /// @param _admins array of admin addresses that are granted the ADMIN_ROLE constructor( uint32 _vid, address[] memory _messageLibs, address _priceFeed, address[] memory _signers, uint64 _quorum, address[] memory _admins ) Worker(_messageLibs, _priceFeed, 12000, address(0x0), _admins) MultiSig(_signers, _quorum) { vid = _vid; } // ========================= Modifier ========================= /// @dev depending on role, restrict access to only self or admin /// @dev ALLOWLIST, DENYLIST, MESSAGE_LIB_ROLE can only be granted/revoked by self /// @dev ADMIN_ROLE can only be granted/revoked by admin /// @dev reverts if not one of the above roles /// @param _role role to check modifier onlySelfOrAdmin(bytes32 _role) { if (_role == ALLOWLIST || _role == DENYLIST || _role == MESSAGE_LIB_ROLE) { // self required if (address(this) != msg.sender) { revert DVN_OnlySelf(); } } else if (_role == ADMIN_ROLE) { // admin required _checkRole(ADMIN_ROLE); } else { revert DVN_InvalidRole(_role); } _; } modifier onlySelf() { if (address(this) != msg.sender) { revert DVN_OnlySelf(); } _; } // ========================= OnlySelf ========================= /// @dev set signers for multisig /// @dev function sig 0x31cb6105 /// @param _signer signer address /// @param _active true to add, false to remove function setSigner(address _signer, bool _active) external onlySelf { _setSigner(_signer, _active); } /// @dev set quorum for multisig /// @dev function sig 0x8585c945 /// @param _quorum to set function setQuorum(uint64 _quorum) external onlySelf { _setQuorum(_quorum); } // ========================= OnlySelf / OnlyAdmin ========================= /// @dev overrides AccessControl to allow self/admin to grant role' /// @dev function sig 0x2f2ff15d /// @param _role role to grant /// @param _account account to grant role to function grantRole(bytes32 _role, address _account) public override onlySelfOrAdmin(_role) { _grantRole(_role, _account); } /// @dev overrides AccessControl to allow self/admin to revoke role /// @dev function sig 0xd547741f /// @param _role role to revoke /// @param _account account to revoke role from function revokeRole(bytes32 _role, address _account) public override onlySelfOrAdmin(_role) { _revokeRole(_role, _account); } // ========================= OnlyQuorum ========================= /// @notice function for quorum to change admin without going through execute function /// @dev calldata in the case is abi.encode new admin address function quorumChangeAdmin(ExecuteParam calldata _param) external { if (_param.expiration <= block.timestamp) { revert DVN_InstructionExpired(); } if (_param.target != address(this)) { revert DVN_InvalidTarget(_param.target); } if (_param.vid != vid) { revert DVN_InvalidVid(_param.vid); } // generate and validate hash bytes32 hash = hashCallData(_param.vid, _param.target, _param.callData, _param.expiration); (bool sigsValid, ) = verifySignatures(hash, _param.signatures); if (!sigsValid) { revert DVN_InvalidSignatures(); } if (usedHashes[hash]) { revert DVN_DuplicatedHash(hash); } usedHashes[hash] = true; _grantRole(ADMIN_ROLE, abi.decode(_param.callData, (address))); } // ========================= OnlyAdmin ========================= /// @param _params array of DstConfigParam function setDstConfig(DstConfigParam[] calldata _params) external onlyRole(ADMIN_ROLE) { for (uint256 i = 0; i < _params.length; ++i) { DstConfigParam calldata param = _params[i]; dstConfig[param.dstEid] = DstConfig(param.gas, param.multiplierBps, param.floorMarginUSD); } emit SetDstConfig(_params); } /// @dev takes a list of instructions and executes them in order /// @dev if any of the instructions fail, it will emit an error event and continue to execute the rest of the instructions /// @param _params array of ExecuteParam, includes target, callData, expiration, signatures function execute(ExecuteParam[] calldata _params) external onlyRole(ADMIN_ROLE) { for (uint256 i = 0; i < _params.length; ++i) { ExecuteParam calldata param = _params[i]; // 1. skip if invalid vid if (param.vid != vid) { continue; } // 2. skip if expired if (param.expiration <= block.timestamp) { continue; } // generate and validate hash bytes32 hash = hashCallData(param.vid, param.target, param.callData, param.expiration); // 3. check signatures (bool sigsValid, ) = verifySignatures(hash, param.signatures); if (!sigsValid) { emit VerifySignaturesFailed(i); continue; } // 4. should check hash bool shouldCheckHash = _shouldCheckHash(bytes4(param.callData)); if (shouldCheckHash) { if (usedHashes[hash]) { emit HashAlreadyUsed(param, hash); continue; } else { usedHashes[hash] = true; // prevent reentry and replay attack } } (bool success, bytes memory rtnData) = param.target.call(param.callData); if (!success) { if (shouldCheckHash) { // need to unset the usedHash otherwise it cant be used usedHashes[hash] = false; } // emit an event in any case emit ExecuteFailed(i, rtnData); } } } /// @dev to support ULNv2 /// @dev the withdrawFee function for ULN30X is built in the Worker contract /// @param _lib message lib address /// @param _to address to withdraw to /// @param _amount amount to withdraw function withdrawFeeFromUlnV2(address _lib, address payable _to, uint256 _amount) external onlyRole(ADMIN_ROLE) { if (!hasRole(MESSAGE_LIB_ROLE, _lib)) { revert Worker_OnlyMessageLib(); } ILayerZeroUltraLightNodeV2(_lib).withdrawNative(_to, _amount); } // ========================= OnlyMessageLib ========================= /// @dev for ULN301, ULN302 and more to assign job /// @dev dvn network can reject job from _sender by adding/removing them from allowlist/denylist /// @param _param assign job param /// @param _options dvn options function assignJob( AssignJobParam calldata _param, bytes calldata _options ) external payable onlyRole(MESSAGE_LIB_ROLE) onlyAcl(_param.sender) returns (uint256 totalFee) { IDVNFeeLib.FeeParams memory feeParams = IDVNFeeLib.FeeParams( priceFeed, _param.dstEid, _param.confirmations, _param.sender, quorum, defaultMultiplierBps ); totalFee = IDVNFeeLib(workerFeeLib).getFeeOnSend(feeParams, dstConfig[_param.dstEid], _options); } /// @dev to support ULNv2 /// @dev dvn network can reject job from _sender by adding/removing them from allowlist/denylist /// @param _dstEid destination EndpointId /// @param //_outboundProofType outbound proof type /// @param _confirmations block confirmations /// @param _sender message sender address function assignJob( uint16 _dstEid, uint16 /*_outboundProofType*/, uint64 _confirmations, address _sender ) external onlyRole(MESSAGE_LIB_ROLE) onlyAcl(_sender) returns (uint256 totalFee) { IDVNFeeLib.FeeParams memory params = IDVNFeeLib.FeeParams( priceFeed, _dstEid, _confirmations, _sender, quorum, defaultMultiplierBps ); // ULNV2 does not have dvn options totalFee = IDVNFeeLib(workerFeeLib).getFeeOnSend(params, dstConfig[_dstEid], bytes("")); emit VerifierFeePaid(totalFee); } // ========================= View ========================= /// @dev getFee can revert if _sender doesn't pass ACL /// @param _dstEid destination EndpointId /// @param _confirmations block confirmations /// @param _sender message sender address /// @param _options dvn options /// @return fee fee in native amount function getFee( uint32 _dstEid, uint64 _confirmations, address _sender, bytes calldata _options ) external view onlyAcl(_sender) returns (uint256 fee) { IDVNFeeLib.FeeParams memory params = IDVNFeeLib.FeeParams( priceFeed, _dstEid, _confirmations, _sender, quorum, defaultMultiplierBps ); return IDVNFeeLib(workerFeeLib).getFee(params, dstConfig[_dstEid], _options); } /// @dev to support ULNv2 /// @dev getFee can revert if _sender doesn't pass ACL /// @param _dstEid destination EndpointId /// @param //_outboundProofType outbound proof type /// @param _confirmations block confirmations /// @param _sender message sender address function getFee( uint16 _dstEid, uint16 /*_outboundProofType*/, uint64 _confirmations, address _sender ) public view onlyAcl(_sender) returns (uint256 fee) { IDVNFeeLib.FeeParams memory params = IDVNFeeLib.FeeParams( priceFeed, _dstEid, _confirmations, _sender, quorum, defaultMultiplierBps ); return IDVNFeeLib(workerFeeLib).getFee(params, dstConfig[_dstEid], bytes("")); } /// @param _target target address /// @param _callData call data /// @param _expiration expiration timestamp /// @return hash of above function hashCallData( uint32 _vid, address _target, bytes calldata _callData, uint256 _expiration ) public pure returns (bytes32) { return keccak256(abi.encodePacked(_vid, _target, _expiration, _callData)); } // ========================= Internal ========================= /// @dev to save gas, we don't check hash for some functions (where replaying won't change the state) /// @dev for example, some administrative functions like changing signers, the contract should check hash to double spending /// @dev should ensure that all onlySelf functions have unique functionSig /// @param _functionSig function signature /// @return true if should check hash function _shouldCheckHash(bytes4 _functionSig) internal pure returns (bool) { // never check for these selectors to save gas return _functionSig != IReceiveUlnE2.verify.selector && // 0x0223536e, replaying won't change the state _functionSig != ILayerZeroUltraLightNodeV2.updateHash.selector; // 0x704316e5, replaying will be revert at uln } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { IMessageLibManager } from "./IMessageLibManager.sol"; import { IMessagingComposer } from "./IMessagingComposer.sol"; import { IMessagingChannel } from "./IMessagingChannel.sol"; import { IMessagingContext } from "./IMessagingContext.sol"; struct MessagingParams { uint32 dstEid; bytes32 receiver; bytes message; bytes options; bool payInLzToken; } struct MessagingReceipt { bytes32 guid; uint64 nonce; MessagingFee fee; } struct MessagingFee { uint256 nativeFee; uint256 lzTokenFee; } struct Origin { uint32 srcEid; bytes32 sender; uint64 nonce; } interface ILayerZeroEndpointV2 is IMessageLibManager, IMessagingComposer, IMessagingChannel, IMessagingContext { event PacketSent(bytes encodedPayload, bytes options, address sendLibrary); event PacketVerified(Origin origin, address receiver, bytes32 payloadHash); event PacketDelivered(Origin origin, address receiver); event LzReceiveAlert( address indexed receiver, address indexed executor, Origin origin, bytes32 guid, uint256 gas, uint256 value, bytes message, bytes extraData, bytes reason ); event LzTokenSet(address token); event DelegateSet(address sender, address delegate); function quote(MessagingParams calldata _params, address _sender) external view returns (MessagingFee memory); function send( MessagingParams calldata _params, address _refundAddress ) external payable returns (MessagingReceipt memory); function verify(Origin calldata _origin, address _receiver, bytes32 _payloadHash) external; function verifiable(Origin calldata _origin, address _receiver) external view returns (bool); function initializable(Origin calldata _origin, address _receiver) external view returns (bool); function lzReceive( Origin calldata _origin, address _receiver, bytes32 _guid, bytes calldata _message, bytes calldata _extraData ) external payable; // oapp can burn messages partially by calling this function with its own business logic if messages are verified in order function clear(address _oapp, Origin calldata _origin, bytes32 _guid, bytes calldata _message) external; function setLzToken(address _lzToken) external; function lzToken() external view returns (address); function nativeToken() external view returns (address); function setDelegate(address _delegate) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol"; import { SetConfigParam } from "./IMessageLibManager.sol"; enum MessageLibType { Send, Receive, SendAndReceive } interface IMessageLib is IERC165 { function setConfig(address _oapp, SetConfigParam[] calldata _config) external; function getConfig(uint32 _eid, address _oapp, uint32 _configType) external view returns (bytes memory config); function isSupportedEid(uint32 _eid) external view returns (bool); // message libs of same major version are compatible function version() external view returns (uint64 major, uint8 minor, uint8 endpointVersion); function messageLibType() external view returns (MessageLibType); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; struct SetConfigParam { uint32 eid; uint32 configType; bytes config; } interface IMessageLibManager { struct Timeout { address lib; uint256 expiry; } event LibraryRegistered(address newLib); event DefaultSendLibrarySet(uint32 eid, address newLib); event DefaultReceiveLibrarySet(uint32 eid, address newLib); event DefaultReceiveLibraryTimeoutSet(uint32 eid, address oldLib, uint256 expiry); event SendLibrarySet(address sender, uint32 eid, address newLib); event ReceiveLibrarySet(address receiver, uint32 eid, address newLib); event ReceiveLibraryTimeoutSet(address receiver, uint32 eid, address oldLib, uint256 timeout); function registerLibrary(address _lib) external; function isRegisteredLibrary(address _lib) external view returns (bool); function getRegisteredLibraries() external view returns (address[] memory); function setDefaultSendLibrary(uint32 _eid, address _newLib) external; function defaultSendLibrary(uint32 _eid) external view returns (address); function setDefaultReceiveLibrary(uint32 _eid, address _newLib, uint256 _timeout) external; function defaultReceiveLibrary(uint32 _eid) external view returns (address); function setDefaultReceiveLibraryTimeout(uint32 _eid, address _lib, uint256 _expiry) external; function defaultReceiveLibraryTimeout(uint32 _eid) external view returns (address lib, uint256 expiry); function isSupportedEid(uint32 _eid) external view returns (bool); function isValidReceiveLibrary(address _receiver, uint32 _eid, address _lib) external view returns (bool); /// ------------------- OApp interfaces ------------------- function setSendLibrary(address _oapp, uint32 _eid, address _newLib) external; function getSendLibrary(address _sender, uint32 _eid) external view returns (address lib); function isDefaultSendLibrary(address _sender, uint32 _eid) external view returns (bool); function setReceiveLibrary(address _oapp, uint32 _eid, address _newLib, uint256 _gracePeriod) external; function getReceiveLibrary(address _receiver, uint32 _eid) external view returns (address lib, bool isDefault); function setReceiveLibraryTimeout(address _oapp, uint32 _eid, address _lib, uint256 _gracePeriod) external; function receiveLibraryTimeout(address _receiver, uint32 _eid) external view returns (address lib, uint256 expiry); function setConfig(address _oapp, address _lib, SetConfigParam[] calldata _params) external; function getConfig( address _oapp, address _lib, uint32 _eid, uint32 _configType ) external view returns (bytes memory config); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingChannel { event InboundNonceSkipped(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce); event PacketNilified(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash); event PacketBurnt(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash); function eid() external view returns (uint32); // this is an emergency function if a message cannot be verified for some reasons // required to provide _nextNonce to avoid race condition function skip(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce) external; function nilify(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external; function burn(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external; function nextGuid(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (bytes32); function inboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64); function outboundNonce(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (uint64); function inboundPayloadHash( address _receiver, uint32 _srcEid, bytes32 _sender, uint64 _nonce ) external view returns (bytes32); function lazyInboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingComposer { event ComposeSent(address from, address to, bytes32 guid, uint16 index, bytes message); event ComposeDelivered(address from, address to, bytes32 guid, uint16 index); event LzComposeAlert( address indexed from, address indexed to, address indexed executor, bytes32 guid, uint16 index, uint256 gas, uint256 value, bytes message, bytes extraData, bytes reason ); function composeQueue( address _from, address _to, bytes32 _guid, uint16 _index ) external view returns (bytes32 messageHash); function sendCompose(address _to, bytes32 _guid, uint16 _index, bytes calldata _message) external; function lzCompose( address _from, address _to, bytes32 _guid, uint16 _index, bytes calldata _message, bytes calldata _extraData ) external payable; }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IMessagingContext { function isSendingMessage() external view returns (bool); function getSendContext() external view returns (uint32 dstEid, address sender); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { MessagingFee } from "./ILayerZeroEndpointV2.sol"; import { IMessageLib } from "./IMessageLib.sol"; struct Packet { uint64 nonce; uint32 srcEid; address sender; uint32 dstEid; bytes32 receiver; bytes32 guid; bytes message; } interface ISendLib is IMessageLib { function send( Packet calldata _packet, bytes calldata _options, bool _payInLzToken ) external returns (MessagingFee memory, bytes memory encodedPacket); function quote( Packet calldata _packet, bytes calldata _options, bool _payInLzToken ) external view returns (MessagingFee memory); function setTreasury(address _treasury) external; function withdrawFee(address _to, uint256 _amount) external; function withdrawLzTokenFee(address _lzToken, address _to, uint256 _amount) external; }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; library Transfer { using SafeERC20 for IERC20; address internal constant ADDRESS_ZERO = address(0); error Transfer_NativeFailed(address _to, uint256 _value); error Transfer_ToAddressIsZero(); function native(address _to, uint256 _value) internal { if (_to == ADDRESS_ZERO) revert Transfer_ToAddressIsZero(); (bool success, ) = _to.call{ value: _value }(""); if (!success) revert Transfer_NativeFailed(_to, _value); } function token(address _token, address _to, uint256 _value) internal { if (_to == ADDRESS_ZERO) revert Transfer_ToAddressIsZero(); IERC20(_token).safeTransfer(_to, _value); } function nativeOrToken(address _token, address _to, uint256 _value) internal { if (_token == ADDRESS_ZERO) { native(_to, _value); } else { token(_token, _to, _value); } } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity >=0.7.0; pragma abicoder v2; interface ILayerZeroUltraLightNodeV2 { // Relayer functions function validateTransactionProof( uint16 _srcChainId, address _dstAddress, uint _gasLimit, bytes32 _lookupHash, bytes32 _blockData, bytes calldata _transactionProof ) external; // an Oracle delivers the block data using updateHash() function updateHash(uint16 _srcChainId, bytes32 _lookupHash, uint _confirmations, bytes32 _blockData) external; // can only withdraw the receivable of the msg.sender function withdrawNative(address payable _to, uint _amount) external; function withdrawZRO(address _to, uint _amount) external; // view functions function getAppConfig( uint16 _remoteChainId, address _userApplicationAddress ) external view returns (ApplicationConfiguration memory); function accruedNativeFee(address _address) external view returns (uint); struct ApplicationConfiguration { uint16 inboundProofLibraryVersion; uint64 inboundBlockConfirmations; address relayer; uint16 outboundProofType; uint64 outboundBlockConfirmations; address oracle; } event HashReceived( uint16 indexed srcChainId, address indexed oracle, bytes32 lookupHash, bytes32 blockData, uint confirmations ); event RelayerParams(bytes adapterParams, uint16 outboundProofType); event Packet(bytes payload); event InvalidDst( uint16 indexed srcChainId, bytes srcAddress, address indexed dstAddress, uint64 nonce, bytes32 payloadHash ); event PacketReceived( uint16 indexed srcChainId, bytes srcAddress, address indexed dstAddress, uint64 nonce, bytes32 payloadHash ); event AppConfigUpdated(address indexed userApplication, uint indexed configType, bytes newConfig); event AddInboundProofLibraryForChain(uint16 indexed chainId, address lib); event EnableSupportedOutboundProof(uint16 indexed chainId, uint16 proofType); event SetChainAddressSize(uint16 indexed chainId, uint size); event SetDefaultConfigForChainId( uint16 indexed chainId, uint16 inboundProofLib, uint64 inboundBlockConfirm, address relayer, uint16 outboundProofType, uint64 outboundBlockConfirm, address oracle ); event SetDefaultAdapterParamsForChainId(uint16 indexed chainId, uint16 indexed proofType, bytes adapterParams); event SetLayerZeroToken(address indexed tokenAddress); event SetRemoteUln(uint16 indexed chainId, bytes32 uln); event SetTreasury(address indexed treasuryAddress); event WithdrawZRO(address indexed msgSender, address indexed to, uint amount); event WithdrawNative(address indexed msgSender, address indexed to, uint amount); }
// 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 v4.7.0) (security/Pausable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { require(!paused(), "Pausable: paused"); } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { require(paused(), "Pausable: not paused"); } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } }
// 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 v4.9.4) (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. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ 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]. * * CAUTION: See Security Considerations above. */ 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 v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/IERC20Permit.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.4) (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; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// 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)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV // Deprecated in v4.8 } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) { // 32 is the length in bytes of hash, // enforced by the type signature above /// @solidity memory-safe-assembly assembly { mstore(0x00, "\x19Ethereum Signed Message:\n32") mstore(0x1c, hash) message := keccak256(0x00, 0x3c) } } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(ptr, "\x19\x01") mstore(add(ptr, 0x02), domainSeparator) mstore(add(ptr, 0x22), structHash) data := keccak256(ptr, 0x42) } } /** * @dev Returns an Ethereum Signed Data with intended validator, created from a * `validator` and `data` according to the version 0 of EIP-191. * * See {recover}. */ function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x00", validator, 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: LZBL-1.2 pragma solidity ^0.8.20; import { Pausable } from "@openzeppelin/contracts/security/Pausable.sol"; import { AccessControl } from "@openzeppelin/contracts/access/AccessControl.sol"; import { ISendLib } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol"; import { Transfer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/Transfer.sol"; import { IWorker } from "./interfaces/IWorker.sol"; abstract contract Worker is AccessControl, Pausable, IWorker { bytes32 internal constant MESSAGE_LIB_ROLE = keccak256("MESSAGE_LIB_ROLE"); bytes32 internal constant ALLOWLIST = keccak256("ALLOWLIST"); bytes32 internal constant DENYLIST = keccak256("DENYLIST"); bytes32 internal constant ADMIN_ROLE = keccak256("ADMIN_ROLE"); address public workerFeeLib; uint64 public allowlistSize; uint16 public defaultMultiplierBps; address public priceFeed; mapping(uint32 eid => uint8[] optionTypes) internal supportedOptionTypes; // ========================= Constructor ========================= /// @param _messageLibs array of message lib addresses that are granted the MESSAGE_LIB_ROLE /// @param _priceFeed price feed address /// @param _defaultMultiplierBps default multiplier for worker fee /// @param _roleAdmin address that is granted the DEFAULT_ADMIN_ROLE (can grant and revoke all roles) /// @param _admins array of admin addresses that are granted the ADMIN_ROLE constructor( address[] memory _messageLibs, address _priceFeed, uint16 _defaultMultiplierBps, address _roleAdmin, address[] memory _admins ) { defaultMultiplierBps = _defaultMultiplierBps; priceFeed = _priceFeed; if (_roleAdmin != address(0x0)) { _grantRole(DEFAULT_ADMIN_ROLE, _roleAdmin); // _roleAdmin can grant and revoke all roles } for (uint256 i = 0; i < _messageLibs.length; ++i) { _grantRole(MESSAGE_LIB_ROLE, _messageLibs[i]); } for (uint256 i = 0; i < _admins.length; ++i) { _grantRole(ADMIN_ROLE, _admins[i]); } } // ========================= Modifier ========================= modifier onlyAcl(address _sender) { if (!hasAcl(_sender)) { revert Worker_NotAllowed(); } _; } /// @dev Access control list using allowlist and denylist /// @dev 1) if one address is in the denylist -> deny /// @dev 2) else if address in the allowlist OR allowlist is empty (allows everyone)-> allow /// @dev 3) else deny /// @param _sender address to check function hasAcl(address _sender) public view returns (bool) { if (hasRole(DENYLIST, _sender)) { return false; } else if (allowlistSize == 0 || hasRole(ALLOWLIST, _sender)) { return true; } else { return false; } } // ========================= OnyDefaultAdmin ========================= /// @dev flag to pause execution of workers (if used with whenNotPaused modifier) /// @param _paused true to pause, false to unpause function setPaused(bool _paused) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_paused) { _pause(); } else { _unpause(); } } // ========================= OnlyAdmin ========================= /// @param _priceFeed price feed address function setPriceFeed(address _priceFeed) external onlyRole(ADMIN_ROLE) { priceFeed = _priceFeed; emit SetPriceFeed(_priceFeed); } /// @param _workerFeeLib worker fee lib address function setWorkerFeeLib(address _workerFeeLib) external onlyRole(ADMIN_ROLE) { workerFeeLib = _workerFeeLib; emit SetWorkerLib(_workerFeeLib); } /// @param _multiplierBps default multiplier for worker fee function setDefaultMultiplierBps(uint16 _multiplierBps) external onlyRole(ADMIN_ROLE) { defaultMultiplierBps = _multiplierBps; emit SetDefaultMultiplierBps(_multiplierBps); } /// @dev supports withdrawing fee from ULN301, ULN302 and more /// @param _lib message lib address /// @param _to address to withdraw fee to /// @param _amount amount to withdraw function withdrawFee(address _lib, address _to, uint256 _amount) external onlyRole(ADMIN_ROLE) { if (!hasRole(MESSAGE_LIB_ROLE, _lib)) revert Worker_OnlyMessageLib(); ISendLib(_lib).withdrawFee(_to, _amount); emit Withdraw(_lib, _to, _amount); } /// @dev supports withdrawing token from the contract /// @param _token token address /// @param _to address to withdraw token to /// @param _amount amount to withdraw function withdrawToken(address _token, address _to, uint256 _amount) external onlyRole(ADMIN_ROLE) { // transfers native if _token is address(0x0) Transfer.nativeOrToken(_token, _to, _amount); } function setSupportedOptionTypes(uint32 _eid, uint8[] calldata _optionTypes) external onlyRole(ADMIN_ROLE) { supportedOptionTypes[_eid] = _optionTypes; } // ========================= View Functions ========================= function getSupportedOptionTypes(uint32 _eid) external view returns (uint8[] memory) { return supportedOptionTypes[_eid]; } // ========================= Internal Functions ========================= /// @dev overrides AccessControl to allow for counting of allowlistSize /// @param _role role to grant /// @param _account address to grant role to function _grantRole(bytes32 _role, address _account) internal override { if (_role == ALLOWLIST && !hasRole(_role, _account)) { ++allowlistSize; } super._grantRole(_role, _account); } /// @dev overrides AccessControl to allow for counting of allowlistSize /// @param _role role to revoke /// @param _account address to revoke role from function _revokeRole(bytes32 _role, address _account) internal override { if (_role == ALLOWLIST && hasRole(_role, _account)) { --allowlistSize; } super._revokeRole(_role, _account); } /// @dev overrides AccessControl to disable renouncing of roles function renounceRole(bytes32 /*role*/, address /*account*/) public pure override { revert Worker_RoleRenouncingDisabled(); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface IWorker { event SetWorkerLib(address workerLib); event SetPriceFeed(address priceFeed); event SetDefaultMultiplierBps(uint16 multiplierBps); event SetSupportedOptionTypes(uint32 dstEid, uint8[] optionTypes); event Withdraw(address lib, address to, uint256 amount); error Worker_NotAllowed(); error Worker_OnlyMessageLib(); error Worker_RoleRenouncingDisabled(); function setPriceFeed(address _priceFeed) external; function priceFeed() external view returns (address); function setDefaultMultiplierBps(uint16 _multiplierBps) external; function defaultMultiplierBps() external view returns (uint16); function withdrawFee(address _lib, address _to, uint256 _amount) external; function setSupportedOptionTypes(uint32 _eid, uint8[] calldata _optionTypes) external; function getSupportedOptionTypes(uint32 _eid) external view returns (uint8[] memory); }
// SPDX-License-Identifier: LZBL-1.2 pragma solidity ^0.8.20; import { ECDSA } from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; abstract contract MultiSig { enum Errors { NoError, SignatureError, DuplicatedSigner, SignerNotInCommittee } mapping(address signer => bool active) public signers; uint64 public signerSize; uint64 public quorum; error MultiSig_OnlySigner(); error MultiSig_QuorumIsZero(); error MultiSig_SignersSizeIsLessThanQuorum(uint64 signersSize, uint64 quorum); error MultiSig_UnorderedSigners(); error MultiSig_StateAlreadySet(address signer, bool active); event UpdateSigner(address _signer, bool _active); event UpdateQuorum(uint64 _quorum); modifier onlySigner() { if (!signers[msg.sender]) { revert MultiSig_OnlySigner(); } _; } constructor(address[] memory _signers, uint64 _quorum) { if (_quorum == 0) { revert MultiSig_QuorumIsZero(); } if (_signers.length < _quorum) { revert MultiSig_SignersSizeIsLessThanQuorum(uint64(_signers.length), _quorum); } address lastSigner = address(0); for (uint256 i = 0; i < _signers.length; i++) { address signer = _signers[i]; if (signer <= lastSigner) { revert MultiSig_UnorderedSigners(); } signers[signer] = true; lastSigner = signer; } signerSize = uint64(_signers.length); quorum = _quorum; } function _setSigner(address _signer, bool _active) internal { if (signers[_signer] == _active) { revert MultiSig_StateAlreadySet(_signer, _active); } signers[_signer] = _active; uint64 _signerSize = _active ? signerSize + 1 : signerSize - 1; uint64 _quorum = quorum; if (_signerSize < _quorum) { revert MultiSig_SignersSizeIsLessThanQuorum(_signerSize, _quorum); } signerSize = _signerSize; emit UpdateSigner(_signer, _active); } function _setQuorum(uint64 _quorum) internal { if (_quorum == 0) { revert MultiSig_QuorumIsZero(); } uint64 _signerSize = signerSize; if (_signerSize < _quorum) { revert MultiSig_SignersSizeIsLessThanQuorum(_signerSize, _quorum); } quorum = _quorum; emit UpdateQuorum(_quorum); } function verifySignatures(bytes32 _hash, bytes calldata _signatures) public view returns (bool, Errors) { if (_signatures.length != uint256(quorum) * 65) { return (false, Errors.SignatureError); } bytes32 messageDigest = _getEthSignedMessageHash(_hash); address lastSigner = address(0); // There cannot be a signer with address 0. for (uint256 i = 0; i < quorum; i++) { bytes calldata signature = _signatures[i * 65:(i + 1) * 65]; (address currentSigner, ECDSA.RecoverError error) = ECDSA.tryRecover(messageDigest, signature); if (error != ECDSA.RecoverError.NoError) return (false, Errors.SignatureError); if (currentSigner <= lastSigner) return (false, Errors.DuplicatedSigner); // prevent duplicate signatures if (!signers[currentSigner]) return (false, Errors.SignerNotInCommittee); // signature is not in committee lastSigner = currentSigner; } return (true, Errors.NoError); } function _getEthSignedMessageHash(bytes32 _messageHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", _messageHash)); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { IWorker } from "../../interfaces/IWorker.sol"; import { ILayerZeroDVN } from "./ILayerZeroDVN.sol"; interface IDVN is IWorker, ILayerZeroDVN { struct DstConfigParam { uint32 dstEid; uint64 gas; uint16 multiplierBps; uint128 floorMarginUSD; } struct DstConfig { uint64 gas; uint16 multiplierBps; uint128 floorMarginUSD; // uses priceFeed PRICE_RATIO_DENOMINATOR } event SetDstConfig(DstConfigParam[] params); function dstConfig(uint32 _dstEid) external view returns (uint64, uint16, uint128); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; import { IDVN } from "./IDVN.sol"; interface IDVNFeeLib { struct FeeParams { address priceFeed; uint32 dstEid; uint64 confirmations; address sender; uint64 quorum; uint16 defaultMultiplierBps; } error DVN_UnsupportedOptionType(uint8 optionType); error DVN_EidNotSupported(uint32 eid); function getFeeOnSend( FeeParams calldata _params, IDVN.DstConfig calldata _dstConfig, bytes calldata _options ) external payable returns (uint256 fee); function getFee( FeeParams calldata _params, IDVN.DstConfig calldata _dstConfig, bytes calldata _options ) external view returns (uint256 fee); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; interface ILayerZeroDVN { struct AssignJobParam { uint32 dstEid; bytes packetHeader; bytes32 payloadHash; uint64 confirmations; address sender; } // @notice query price and assign jobs at the same time // @param _dstEid - the destination endpoint identifier // @param _packetHeader - version + nonce + path // @param _payloadHash - hash of guid + message // @param _confirmations - block confirmation delay before relaying blocks // @param _sender - the source sending contract address // @param _options - options function assignJob(AssignJobParam calldata _param, bytes calldata _options) external payable returns (uint256 fee); // @notice query the dvn fee for relaying block information to the destination chain // @param _dstEid the destination endpoint identifier // @param _confirmations - block confirmation delay before relaying blocks // @param _sender - the source sending contract address // @param _options - options function getFee( uint32 _dstEid, uint64 _confirmations, address _sender, bytes calldata _options ) external view returns (uint256 fee); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; /// @dev should be implemented by the ReceiveUln302 contract and future ReceiveUln contracts on EndpointV2 interface IReceiveUlnE2 { /// @notice for each dvn to verify the payload /// @dev this function signature 0x0223536e function verify(bytes calldata _packetHeader, bytes32 _payloadHash, uint64 _confirmations) external; /// @notice verify the payload at endpoint, will check if all DVNs verified function commitVerification(bytes calldata _packetHeader, bytes32 _payloadHash) external; }
{ "evmVersion": "paris", "optimizer": { "enabled": true, "runs": 20000 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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[{"inputs":[{"internalType":"uint32","name":"_vid","type":"uint32"},{"internalType":"address[]","name":"_messageLibs","type":"address[]"},{"internalType":"address","name":"_priceFeed","type":"address"},{"internalType":"address[]","name":"_signers","type":"address[]"},{"internalType":"uint64","name":"_quorum","type":"uint64"},{"internalType":"address[]","name":"_admins","type":"address[]"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"bytes32","name":"executableHash","type":"bytes32"}],"name":"DVN_DuplicatedHash","type":"error"},{"inputs":[],"name":"DVN_InstructionExpired","type":"error"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"DVN_InvalidRole","type":"error"},{"inputs":[],"name":"DVN_InvalidSignatures","type":"error"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"DVN_InvalidTarget","type":"error"},{"inputs":[{"internalType":"uint32","name":"vid","type":"uint32"}],"name":"DVN_InvalidVid","type":"error"},{"inputs":[],"name":"DVN_OnlySelf","type":"error"},{"inputs":[],"name":"MultiSig_OnlySigner","type":"error"},{"inputs":[],"name":"MultiSig_QuorumIsZero","type":"error"},{"inputs":[{"internalType":"uint64","name":"signersSize","type":"uint64"},{"internalType":"uint64","name":"quorum","type":"uint64"}],"name":"MultiSig_SignersSizeIsLessThanQuorum","type":"error"},{"inputs":[{"internalType":"address","name":"signer","type":"address"},{"internalType":"bool","name":"active","type":"bool"}],"name":"MultiSig_StateAlreadySet","type":"error"},{"inputs":[],"name":"MultiSig_UnorderedSigners","type":"error"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"Transfer_NativeFailed","type":"error"},{"inputs":[],"name":"Transfer_ToAddressIsZero","type":"error"},{"inputs":[],"name":"Worker_NotAllowed","type":"error"},{"inputs":[],"name":"Worker_OnlyMessageLib","type":"error"},{"inputs":[],"name":"Worker_RoleRenouncingDisabled","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_index","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"_data","type":"bytes"}],"name":"ExecuteFailed","type":"event"},{"anonymous":false,"inputs":[{"components":[{"internalType":"uint32","name":"vid","type":"uint32"},{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"uint256","name":"expiration","type":"uint256"},{"internalType":"bytes","name":"signatures","type":"bytes"}],"indexed":false,"internalType":"struct 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IDVN.DstConfigParam[]","name":"params","type":"tuple[]"}],"name":"SetDstConfig","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"priceFeed","type":"address"}],"name":"SetPriceFeed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint32","name":"dstEid","type":"uint32"},{"indexed":false,"internalType":"uint8[]","name":"optionTypes","type":"uint8[]"}],"name":"SetSupportedOptionTypes","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"workerLib","type":"address"}],"name":"SetWorkerLib","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint64","name":"_quorum","type":"uint64"}],"name":"UpdateQuorum","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_signer","type":"address"},{"indexed":false,"internalType":"bool","name":"_active","type":"bool"}],"name":"UpdateSigner","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"fee","type":"uint256"}],"name":"VerifierFeePaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"idx","type":"uint256"}],"name":"VerifySignaturesFailed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"lib","type":"address"},{"indexed":false,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"allowlistSize","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint32","name":"dstEid","type":"uint32"},{"internalType":"bytes","name":"packetHeader","type":"bytes"},{"internalType":"bytes32","name":"payloadHash","type":"bytes32"},{"internalType":"uint64","name":"confirmations","type":"uint64"},{"internalType":"address","name":"sender","type":"address"}],"internalType":"struct ILayerZeroDVN.AssignJobParam","name":"_param","type":"tuple"},{"internalType":"bytes","name":"_options","type":"bytes"}],"name":"assignJob","outputs":[{"internalType":"uint256","name":"totalFee","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint16","name":"_dstEid","type":"uint16"},{"internalType":"uint16","name":"","type":"uint16"},{"internalType":"uint64","name":"_confirmations","type":"uint64"},{"internalType":"address","name":"_sender","type":"address"}],"name":"assignJob","outputs":[{"internalType":"uint256","name":"totalFee","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"defaultMultiplierBps","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"dstEid","type":"uint32"}],"name":"dstConfig","outputs":[{"internalType":"uint64","name":"gas","type":"uint64"},{"internalType":"uint16","name":"multiplierBps","type":"uint16"},{"internalType":"uint128","name":"floorMarginUSD","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint32","name":"vid","type":"uint32"},{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"},{"internalType":"uint256","name":"expiration","type":"uint256"},{"internalType":"bytes","name":"signatures","type":"bytes"}],"internalType":"struct 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ExecuteParam","name":"_param","type":"tuple"}],"name":"quorumChangeAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"},{"internalType":"address","name":"","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_role","type":"bytes32"},{"internalType":"address","name":"_account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"_multiplierBps","type":"uint16"}],"name":"setDefaultMultiplierBps","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint32","name":"dstEid","type":"uint32"},{"internalType":"uint64","name":"gas","type":"uint64"},{"internalType":"uint16","name":"multiplierBps","type":"uint16"},{"internalType":"uint128","name":"floorMarginUSD","type":"uint128"}],"internalType":"struct IDVN.DstConfigParam[]","name":"_params","type":"tuple[]"}],"name":"setDstConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_paused","type":"bool"}],"name":"setPaused","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_priceFeed","type":"address"}],"name":"setPriceFeed","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"_quorum","type":"uint64"}],"name":"setQuorum","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_signer","type":"address"},{"internalType":"bool","name":"_active","type":"bool"}],"name":"setSigner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_eid","type":"uint32"},{"internalType":"uint8[]","name":"_optionTypes","type":"uint8[]"}],"name":"setSupportedOptionTypes","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_workerFeeLib","type":"address"}],"name":"setWorkerFeeLib","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"signerSize","outputs":[{"internalType":"uint64","name":"","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"signer","type":"address"}],"name":"signers","outputs":[{"internalType":"bool","name":"active","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"executableHash","type":"bytes32"}],"name":"usedHashes","outputs":[{"internalType":"bool","name":"used","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_hash","type":"bytes32"},{"internalType":"bytes","name":"_signatures","type":"bytes"}],"name":"verifySignatures","outputs":[{"internalType":"bool","name":"","type":"bool"},{"internalType":"enum MultiSig.Errors","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vid","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_lib","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_lib","type":"address"},{"internalType":"address payable","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawFeeFromUlnV2","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"workerFeeLib","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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
Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _vid (uint32): 101
Arg [1] : _messageLibs (address[]): 0xbB2Ea70C9E858123480642Cf96acbcCE1372dCe1,0xD231084BfB234C107D3eE2b22F97F3346fDAF705,0x4D73AdB72bC3DD368966edD0f0b2148401A178E2
Arg [2] : _priceFeed (address): 0xC03f31fD86a9077785b7bCf6598Ce3598Fa91113
Arg [3] : _signers (address[]): 0x5AB40527AA622960E26a171c58011de58DFA5bE9,0x7e1879A1Fba74d8107E2E3EE42f5fea5E6500f5B,0xE4059e1B02d8d74Fc82d27BD5006Ecc3605D9CEc
Arg [4] : _quorum (uint64): 2
Arg [5] : _admins (address[]): 0x9F403140Bc0574D7d36eA472b82DAa1Bbd4eF327,0xB8FF877ed78Ba520Ece21B1de7843A8a57cA47Cb
-----Encoded View---------------
17 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000065
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 000000000000000000000000c03f31fd86a9077785b7bcf6598ce3598fa91113
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [5] : 00000000000000000000000000000000000000000000000000000000000001c0
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [7] : 000000000000000000000000bb2ea70c9e858123480642cf96acbcce1372dce1
Arg [8] : 000000000000000000000000d231084bfb234c107d3ee2b22f97f3346fdaf705
Arg [9] : 0000000000000000000000004d73adb72bc3dd368966edd0f0b2148401a178e2
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [11] : 0000000000000000000000005ab40527aa622960e26a171c58011de58dfa5be9
Arg [12] : 0000000000000000000000007e1879a1fba74d8107e2e3ee42f5fea5e6500f5b
Arg [13] : 000000000000000000000000e4059e1b02d8d74fc82d27bd5006ecc3605d9cec
Arg [14] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [15] : 0000000000000000000000009f403140bc0574d7d36ea472b82daa1bbd4ef327
Arg [16] : 000000000000000000000000b8ff877ed78ba520ece21b1de7843a8a57ca47cb
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Multichain Portfolio | 30 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.