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Latest 25 from a total of 34,404 transactions
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Deploy Clone Wal... | 21716639 | 77 days ago | IN | 0 ETH | 0.00377603 | ||||
Deploy Clone Wal... | 21503109 | 106 days ago | IN | 0 ETH | 0.00076505 | ||||
Deploy Clone Wal... | 20734054 | 214 days ago | IN | 0 ETH | 0.00026311 | ||||
Deploy Clone Wal... | 20687625 | 220 days ago | IN | 0 ETH | 0.000171 | ||||
Deploy Clone Wal... | 20672745 | 222 days ago | IN | 0 ETH | 0.00038338 | ||||
Deploy Clone Wal... | 20643475 | 226 days ago | IN | 0 ETH | 0.0001538 | ||||
Deploy Clone Wal... | 20630543 | 228 days ago | IN | 0 ETH | 0.00015904 | ||||
Deploy Clone Wal... | 17880374 | 613 days ago | IN | 0 ETH | 0.00222378 | ||||
Deploy Clone Wal... | 16592920 | 794 days ago | IN | 0 ETH | 0.0090152 | ||||
Deploy Clone Wal... | 16378867 | 824 days ago | IN | 0 ETH | 0.00305416 | ||||
Deploy Clone Wal... | 15698490 | 919 days ago | IN | 0 ETH | 0.00114169 | ||||
Deploy Clone Wal... | 15583419 | 935 days ago | IN | 0 ETH | 0.01372171 | ||||
Deploy Clone Wal... | 14948572 | 1037 days ago | IN | 0 ETH | 0.00786221 | ||||
Deploy Clone Wal... | 14548214 | 1101 days ago | IN | 0 ETH | 0.00620102 | ||||
Deploy Clone Wal... | 14084618 | 1173 days ago | IN | 0 ETH | 0.01342625 | ||||
Deploy Clone Wal... | 14040440 | 1180 days ago | IN | 0 ETH | 0.01398306 | ||||
Deploy Clone Wal... | 14013680 | 1184 days ago | IN | 0 ETH | 0.02123253 | ||||
Deploy Clone Wal... | 14009660 | 1185 days ago | IN | 0 ETH | 0.01390417 | ||||
Deploy Clone Wal... | 14009199 | 1185 days ago | IN | 0 ETH | 0.01367755 | ||||
Deploy Clone Wal... | 13895873 | 1202 days ago | IN | 0 ETH | 0.01448571 | ||||
Deploy Clone Wal... | 13893477 | 1203 days ago | IN | 0 ETH | 0.00650036 | ||||
Deploy Clone Wal... | 13880052 | 1205 days ago | IN | 0 ETH | 0.00597189 | ||||
Deploy Clone Wal... | 13858818 | 1208 days ago | IN | 0 ETH | 0.01629012 | ||||
Deploy Clone Wal... | 13822427 | 1214 days ago | IN | 0 ETH | 0.00791711 | ||||
Deploy Clone Wal... | 13794499 | 1218 days ago | IN | 0 ETH | 0.01251508 |
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0x3d602d80 | 21716639 | 77 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 21503109 | 106 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 20734054 | 214 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 20687625 | 220 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 20672745 | 222 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 20643475 | 226 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 20630543 | 228 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 17880374 | 613 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 16592920 | 794 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 16378867 | 824 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 15698490 | 919 days ago | Contract Creation | 0 ETH | |||
0x3d602d80 | 15583419 | 935 days ago | Contract Creation | 0 ETH | |||
- | 14948572 | 1037 days ago | Contract Creation | 0 ETH | |||
- | 14548214 | 1101 days ago | Contract Creation | 0 ETH | |||
- | 14084618 | 1173 days ago | Contract Creation | 0 ETH | |||
- | 14040440 | 1180 days ago | Contract Creation | 0 ETH | |||
- | 14013680 | 1184 days ago | Contract Creation | 0 ETH | |||
- | 14009660 | 1185 days ago | Contract Creation | 0 ETH | |||
- | 14009199 | 1185 days ago | Contract Creation | 0 ETH | |||
- | 13895873 | 1202 days ago | Contract Creation | 0 ETH | |||
- | 13893477 | 1203 days ago | Contract Creation | 0 ETH | |||
- | 13880052 | 1205 days ago | Contract Creation | 0 ETH | |||
- | 13858818 | 1208 days ago | Contract Creation | 0 ETH | |||
- | 13822427 | 1214 days ago | Contract Creation | 0 ETH | |||
- | 13794499 | 1218 days ago | Contract Creation | 0 ETH |
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Contract Name:
WalletFactory
Compiler Version
v0.5.10+commit.5a6ea5b1
Optimization Enabled:
Yes with 200 runs
Other Settings:
constantinople EvmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2019-07-04 */ // File: contracts/ERC721/ERC721ReceiverDraft.sol pragma solidity ^0.5.10; /// @title ERC721ReceiverDraft /// @dev Interface for any contract that wants to support safeTransfers from /// ERC721 asset contracts. /// @dev Note: this is the interface defined from /// https://github.com/ethereum/EIPs/commit/2bddd126def7c046e1e62408dc2b51bdd9e57f0f /// to https://github.com/ethereum/EIPs/commit/27788131d5975daacbab607076f2ee04624f9dbb /// and is not the final interface. /// Due to the extended period of time this revision was specified in the draft, /// we are supporting both this and the newer (final) interface in order to be /// compatible with any ERC721 implementations that may have used this interface. contract ERC721ReceiverDraft { /// @dev Magic value to be returned upon successful reception of an NFT /// Equals to `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`, /// which can be also obtained as `ERC721ReceiverDraft(0).onERC721Received.selector` /// @dev see https://github.com/ethereum/EIPs/commit/2bddd126def7c046e1e62408dc2b51bdd9e57f0f bytes4 internal constant ERC721_RECEIVED_DRAFT = 0xf0b9e5ba; /// @notice Handle the receipt of an NFT /// @dev The ERC721 smart contract calls this function on the recipient /// after a `transfer`. This function MAY throw to revert and reject the /// transfer. This function MUST use 50,000 gas or less. Return of other /// than the magic value MUST result in the transaction being reverted. /// Note: the contract address is always the message sender. /// @param _from The sending address /// @param _tokenId The NFT identifier which is being transfered /// @param data Additional data with no specified format /// @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))` /// unless throwing function onERC721Received(address _from, uint256 _tokenId, bytes calldata data) external returns(bytes4); } // File: contracts/ERC721/ERC721ReceiverFinal.sol pragma solidity ^0.5.10; /// @title ERC721ReceiverFinal /// @notice Interface for any contract that wants to support safeTransfers from /// ERC721 asset contracts. /// @dev Note: this is the final interface as defined at http://erc721.org contract ERC721ReceiverFinal { /// @dev Magic value to be returned upon successful reception of an NFT /// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`, /// which can be also obtained as `ERC721ReceiverFinal(0).onERC721Received.selector` /// @dev see https://github.com/OpenZeppelin/openzeppelin-solidity/blob/v1.12.0/contracts/token/ERC721/ERC721Receiver.sol bytes4 internal constant ERC721_RECEIVED_FINAL = 0x150b7a02; /// @notice Handle the receipt of an NFT /// @dev The ERC721 smart contract calls this function on the recipient /// after a `safetransfer`. This function MAY throw to revert and reject the /// transfer. Return of other than the magic value MUST result in the /// transaction being reverted. /// Note: the contract address is always the message sender. /// @param _operator The address which called `safeTransferFrom` function /// @param _from The address which previously owned the token /// @param _tokenId The NFT identifier which is being transferred /// @param _data Additional data with no specified format /// @return `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` function onERC721Received( address _operator, address _from, uint256 _tokenId, bytes memory _data ) public returns (bytes4); } // File: contracts/ERC721/ERC721Receivable.sol pragma solidity ^0.5.10; /// @title ERC721Receivable handles the reception of ERC721 tokens /// See ERC721 specification /// @author Christopher Scott /// @dev These functions are public, and could be called by anyone, even in the case /// where no NFTs have been transferred. Since it's not a reliable source of /// truth about ERC721 tokens being transferred, we save the gas and don't /// bother emitting a (potentially spurious) event as found in /// https://github.com/OpenZeppelin/openzeppelin-solidity/blob/5471fc808a17342d738853d7bf3e9e5ef3108074/contracts/mocks/ERC721ReceiverMock.sol contract ERC721Receivable is ERC721ReceiverDraft, ERC721ReceiverFinal { /// @notice Handle the receipt of an NFT /// @dev The ERC721 smart contract calls this function on the recipient /// after a `transfer`. This function MAY throw to revert and reject the /// transfer. This function MUST use 50,000 gas or less. Return of other /// than the magic value MUST result in the transaction being reverted. /// Note: the contract address is always the message sender. /// @param _from The sending address /// @param _tokenId The NFT identifier which is being transfered /// @param data Additional data with no specified format /// @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))` /// unless throwing function onERC721Received(address _from, uint256 _tokenId, bytes calldata data) external returns(bytes4) { _from; _tokenId; data; // emit ERC721Received(_operator, _from, _tokenId, _data, gasleft()); return ERC721_RECEIVED_DRAFT; } /// @notice Handle the receipt of an NFT /// @dev The ERC721 smart contract calls this function on the recipient /// after a `safetransfer`. This function MAY throw to revert and reject the /// transfer. Return of other than the magic value MUST result in the /// transaction being reverted. /// Note: the contract address is always the message sender. /// @param _operator The address which called `safeTransferFrom` function /// @param _from The address which previously owned the token /// @param _tokenId The NFT identifier which is being transferred /// @param _data Additional data with no specified format /// @return `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` function onERC721Received( address _operator, address _from, uint256 _tokenId, bytes memory _data ) public returns(bytes4) { _operator; _from; _tokenId; _data; // emit ERC721Received(_operator, _from, _tokenId, _data, gasleft()); return ERC721_RECEIVED_FINAL; } } // File: contracts/ERC223/ERC223Receiver.sol pragma solidity ^0.5.10; /// @title ERC223Receiver ensures we are ERC223 compatible /// @author Christopher Scott contract ERC223Receiver { bytes4 public constant ERC223_ID = 0xc0ee0b8a; struct TKN { address sender; uint value; bytes data; bytes4 sig; } /// @notice tokenFallback is called from an ERC223 compatible contract /// @param _from the address from which the token was sent /// @param _value the amount of tokens sent /// @param _data the data sent with the transaction function tokenFallback(address _from, uint _value, bytes memory _data) public pure { _from; _value; _data; // TKN memory tkn; // tkn.sender = _from; // tkn.value = _value; // tkn.data = _data; // uint32 u = uint32(_data[3]) + (uint32(_data[2]) << 8) + (uint32(_data[1]) << 16) + (uint32(_data[0]) << 24); // tkn.sig = bytes4(u); /* tkn variable is analogue of msg variable of Ether transaction * tkn.sender is person who initiated this token transaction (analogue of msg.sender) * tkn.value the number of tokens that were sent (analogue of msg.value) * tkn.data is data of token transaction (analogue of msg.data) * tkn.sig is 4 bytes signature of function * if data of token transaction is a function execution */ } } // File: contracts/ERC1271/ERC1271.sol pragma solidity ^0.5.10; contract ERC1271 { /// @dev bytes4(keccak256("isValidSignature(bytes32,bytes)") bytes4 internal constant ERC1271_VALIDSIGNATURE = 0x1626ba7e; /// @dev Should return whether the signature provided is valid for the provided data /// @param hash 32-byte hash of the data that is signed /// @param _signature Signature byte array associated with _data /// MUST return the bytes4 magic value 0x1626ba7e when function passes. /// MUST NOT modify state (using STATICCALL for solc < 0.5, view modifier for solc > 0.5) /// MUST allow external calls function isValidSignature( bytes32 hash, bytes calldata _signature) external view returns (bytes4); } // File: contracts/ECDSA.sol pragma solidity ^0.5.10; /// @title ECDSA is a library that contains useful methods for working with ECDSA signatures library ECDSA { /// @notice Extracts the r, s, and v components from the `sigData` field starting from the `offset` /// @dev Note: does not do any bounds checking on the arguments! /// @param sigData the signature data; could be 1 or more packed signatures. /// @param offset the offset in sigData from which to start unpacking the signature components. function extractSignature(bytes memory sigData, uint256 offset) internal pure returns (bytes32 r, bytes32 s, uint8 v) { // Divide the signature in r, s and v variables // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. // solium-disable-next-line security/no-inline-assembly assembly { let dataPointer := add(sigData, offset) r := mload(add(dataPointer, 0x20)) s := mload(add(dataPointer, 0x40)) v := byte(0, mload(add(dataPointer, 0x60))) } return (r, s, v); } } // File: contracts/Wallet/CoreWallet.sol pragma solidity ^0.5.10; /// @title Core Wallet /// @notice A basic smart contract wallet with cosigner functionality. The notion of "cosigner" is /// the simplest possible multisig solution, a two-of-two signature scheme. It devolves nicely /// to "one-of-one" (i.e. singlesig) by simply having the cosigner set to the same value as /// the main signer. /// /// Most "advanced" functionality (deadman's switch, multiday recovery flows, blacklisting, etc) /// can be implemented externally to this smart contract, either as an additional smart contract /// (which can be tracked as a signer without cosigner, or as a cosigner) or as an off-chain flow /// using a public/private key pair as cosigner. Of course, the basic cosigning functionality could /// also be implemented in this way, but (A) the complexity and gas cost of two-of-two multisig (as /// implemented here) is negligable even if you don't need the cosigner functionality, and /// (B) two-of-two multisig (as implemented here) handles a lot of really common use cases, most /// notably third-party gas payment and off-chain blacklisting and fraud detection. contract CoreWallet is ERC721Receivable, ERC223Receiver, ERC1271 { using ECDSA for bytes; /// @notice We require that presigned transactions use the EIP-191 signing format. /// See that EIP for more info: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-191.md byte public constant EIP191_VERSION_DATA = byte(0); byte public constant EIP191_PREFIX = byte(0x19); /// @notice This is the version of the contract. string public constant VERSION = "1.1.0"; /// @notice This is a sentinel value used to determine when a delegate is set to expose /// support for an interface containing more than a single function. See `delegates` and /// `setDelegate` for more information. address public constant COMPOSITE_PLACEHOLDER = address(1); /// @notice A pre-shifted "1", used to increment the authVersion, so we can "prepend" /// the authVersion to an address (for lookups in the authorizations mapping) /// by using the '+' operator (which is cheaper than a shift and a mask). See the /// comment on the `authorizations` variable for how this is used. uint256 public constant AUTH_VERSION_INCREMENTOR = (1 << 160); /// @notice The pre-shifted authVersion (to get the current authVersion as an integer, /// shift this value right by 160 bits). Starts as `1 << 160` (`AUTH_VERSION_INCREMENTOR`) /// See the comment on the `authorizations` variable for how this is used. uint256 public authVersion; /// @notice A mapping containing all of the addresses that are currently authorized to manage /// the assets owned by this wallet. /// /// The keys in this mapping are authorized addresses with a version number prepended, /// like so: (authVersion,96)(address,160). The current authVersion MUST BE included /// for each look-up; this allows us to effectively clear the entire mapping of its /// contents merely by incrementing the authVersion variable. (This is important for /// the emergencyRecovery() method.) Inspired by https://ethereum.stackexchange.com/a/42540 /// /// The values in this mapping are 256bit words, whose lower 20 bytes constitute "cosigners" /// for each address. If an address maps to itself, then that address is said to have no cosigner. /// /// The upper 12 bytes are reserved for future meta-data purposes. The meta-data could refer /// to the key (authorized address) or the value (cosigner) of the mapping. /// /// Addresses that map to a non-zero cosigner in the current authVersion are called /// "authorized addresses". mapping(uint256 => uint256) public authorizations; /// @notice A per-key nonce value, incremented each time a transaction is processed with that key. /// Used for replay prevention. The nonce value in the transaction must exactly equal the current /// nonce value in the wallet for that key. (This mirrors the way Ethereum's transaction nonce works.) mapping(address => uint256) public nonces; /// @notice A mapping tracking dynamically supported interfaces and their corresponding /// implementation contracts. Keys are interface IDs and values are addresses of /// contracts that are responsible for implementing the function corresponding to the /// interface. /// /// Delegates are added (or removed) via the `setDelegate` method after the contract is /// deployed, allowing support for new interfaces to be dynamically added after deployment. /// When a delegate is added, its interface ID is considered "supported" under EIP165. /// /// For cases where an interface composed of more than a single function must be /// supported, it is necessary to manually add the composite interface ID with /// `setDelegate(interfaceId, COMPOSITE_PLACEHOLDER)`. Interface IDs added with the /// COMPOSITE_PLACEHOLDER address are ignored when called and are only used to specify /// supported interfaces. mapping(bytes4 => address) public delegates; /// @notice A special address that is authorized to call `emergencyRecovery()`. That function /// resets ALL authorization for this wallet, and must therefore be treated with utmost security. /// Reasonable choices for recoveryAddress include: /// - the address of a private key in cold storage /// - a physically secured hardware wallet /// - a multisig smart contract, possibly with a time-delayed challenge period /// - the zero address, if you like performing without a safety net ;-) address public recoveryAddress; /// @notice Used to track whether or not this contract instance has been initialized. This /// is necessary since it is common for this wallet smart contract to be used as the "library /// code" for an clone contract. See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1167.md /// for more information about clone contracts. bool public initialized; /// @notice Used to decorate methods that can only be called directly by the recovery address. modifier onlyRecoveryAddress() { require(msg.sender == recoveryAddress, "sender must be recovery address"); _; } /// @notice Used to decorate the `init` function so this can only be called one time. Necessary /// since this contract will often be used as a "clone". (See above.) modifier onlyOnce() { require(!initialized, "must not already be initialized"); initialized = true; _; } /// @notice Used to decorate methods that can only be called indirectly via an `invoke()` method. /// In practice, it means that those methods can only be called by a signer/cosigner /// pair that is currently authorized. Theoretically, we could factor out the /// signer/cosigner verification code and use it explicitly in this modifier, but that /// would either result in duplicated code, or additional overhead in the invoke() /// calls (due to the stack manipulation for calling into the shared verification function). /// Doing it this way makes calling the administration functions more expensive (since they /// go through a explicit call() instead of just branching within the contract), but it /// makes invoke() more efficient. We assume that invoke() will be used much, much more often /// than any of the administration functions. modifier onlyInvoked() { require(msg.sender == address(this), "must be called from `invoke()`"); _; } /// @notice Emitted when an authorized address is added, removed, or modified. When an /// authorized address is removed ("deauthorized"), cosigner will be address(0) in /// this event. /// /// NOTE: When emergencyRecovery() is called, all existing addresses are deauthorized /// WITHOUT Authorized(addr, 0) being emitted. If you are keeping an off-chain mirror of /// authorized addresses, you must also watch for EmergencyRecovery events. /// @dev hash is 0xf5a7f4fb8a92356e8c8c4ae7ac3589908381450500a7e2fd08c95600021ee889 /// @param authorizedAddress the address to authorize or unauthorize /// @param cosigner the 2-of-2 signatory (optional). event Authorized(address authorizedAddress, uint256 cosigner); /// @notice Emitted when an emergency recovery has been performed. If this event is fired, /// ALL previously authorized addresses have been deauthorized and the only authorized /// address is the authorizedAddress indicated in this event. /// @dev hash is 0xe12d0bbeb1d06d7a728031056557140afac35616f594ef4be227b5b172a604b5 /// @param authorizedAddress the new authorized address /// @param cosigner the cosigning address for `authorizedAddress` event EmergencyRecovery(address authorizedAddress, uint256 cosigner); /// @notice Emitted when the recovery address changes. Either (but not both) of the /// parameters may be zero. /// @dev hash is 0x568ab3dedd6121f0385e007e641e74e1f49d0fa69cab2957b0b07c4c7de5abb6 /// @param previousRecoveryAddress the previous recovery address /// @param newRecoveryAddress the new recovery address event RecoveryAddressChanged(address previousRecoveryAddress, address newRecoveryAddress); /// @dev Emitted when this contract receives a non-zero amount ether via the fallback function /// (i.e. This event is not fired if the contract receives ether as part of a method invocation) /// @param from the address which sent you ether /// @param value the amount of ether sent event Received(address from, uint value); /// @notice Emitted whenever a transaction is processed successfully from this wallet. Includes /// both simple send ether transactions, as well as other smart contract invocations. /// @dev hash is 0x101214446435ebbb29893f3348e3aae5ea070b63037a3df346d09d3396a34aee /// @param hash The hash of the entire operation set. 0 is returned when emitted from `invoke0()`. /// @param result A bitfield of the results of the operations. A bit of 0 means success, and 1 means failure. /// @param numOperations A count of the number of operations processed event InvocationSuccess( bytes32 hash, uint256 result, uint256 numOperations ); /// @notice Emitted when a delegate is added or removed. /// @param interfaceId The interface ID as specified by EIP165 /// @param delegate The address of the contract implementing the given function. If this is /// COMPOSITE_PLACEHOLDER, we are indicating support for a composite interface. event DelegateUpdated(bytes4 interfaceId, address delegate); /// @notice The shared initialization code used to setup the contract state regardless of whether or /// not the clone pattern is being used. /// @param _authorizedAddress the initial authorized address, must not be zero! /// @param _cosigner the initial cosigning address for `_authorizedAddress`, can be equal to `_authorizedAddress` /// @param _recoveryAddress the initial recovery address for the wallet, can be address(0) function init(address _authorizedAddress, uint256 _cosigner, address _recoveryAddress) public onlyOnce { require(_authorizedAddress != _recoveryAddress, "Do not use the recovery address as an authorized address."); require(address(_cosigner) != _recoveryAddress, "Do not use the recovery address as a cosigner."); require(_authorizedAddress != address(0), "Authorized addresses must not be zero."); require(address(_cosigner) != address(0), "Initial cosigner must not be zero."); recoveryAddress = _recoveryAddress; // set initial authorization value authVersion = AUTH_VERSION_INCREMENTOR; // add initial authorized address authorizations[authVersion + uint256(_authorizedAddress)] = _cosigner; emit Authorized(_authorizedAddress, _cosigner); } /// @notice The fallback function, invoked whenever we receive a transaction that doesn't call any of our /// named functions. In particular, this method is called when we are the target of a simple send /// transaction, when someone calls a method we have dynamically added a delegate for, or when someone /// tries to call a function we don't implement, either statically or dynamically. /// /// A correct invocation of this method occurs in two cases: /// - someone transfers ETH to this wallet (`msg.data.length` is 0) /// - someone calls a delegated function (`msg.data.length` is greater than 0 and /// `delegates[msg.sig]` is set) /// In all other cases, this function will revert. /// /// NOTE: Some smart contracts send 0 eth as part of a more complex operation /// (-cough- CryptoKitties -cough-); ideally, we'd `require(msg.value > 0)` here when /// `msg.data.length == 0`, but to work with those kinds of smart contracts, we accept zero sends /// and just skip logging in that case. function() external payable { if (msg.value > 0) { emit Received(msg.sender, msg.value); } if (msg.data.length > 0) { address delegate = delegates[msg.sig]; require(delegate > COMPOSITE_PLACEHOLDER, "Invalid transaction"); // We have found a delegate contract that is responsible for the method signature of // this call. Now, pass along the calldata of this CALL to the delegate contract. assembly { calldatacopy(0, 0, calldatasize()) let result := staticcall(gas, delegate, 0, calldatasize(), 0, 0) returndatacopy(0, 0, returndatasize()) // If the delegate reverts, we revert. If the delegate does not revert, we return the data // returned by the delegate to the original caller. switch result case 0 { revert(0, returndatasize()) } default { return(0, returndatasize()) } } } } /// @notice Adds or removes dynamic support for an interface. Can be used in 3 ways: /// - Add a contract "delegate" that implements a single function /// - Remove delegate for a function /// - Specify that an interface ID is "supported", without adding a delegate. This is /// used for composite interfaces when the interface ID is not a single method ID. /// @dev Must be called through `invoke` /// @param _interfaceId The ID of the interface we are adding support for /// @param _delegate Either: /// - the address of a contract that implements the function specified by `_interfaceId` /// for adding an implementation for a single function /// - 0 for removing an existing delegate /// - COMPOSITE_PLACEHOLDER for specifying support for a composite interface function setDelegate(bytes4 _interfaceId, address _delegate) external onlyInvoked { delegates[_interfaceId] = _delegate; emit DelegateUpdated(_interfaceId, _delegate); } /// @notice Configures an authorizable address. Can be used in four ways: /// - Add a new signer/cosigner pair (cosigner must be non-zero) /// - Set or change the cosigner for an existing signer (if authorizedAddress != cosigner) /// - Remove the cosigning requirement for a signer (if authorizedAddress == cosigner) /// - Remove a signer (if cosigner == address(0)) /// @dev Must be called through `invoke()` /// @param _authorizedAddress the address to configure authorization /// @param _cosigner the corresponding cosigning address function setAuthorized(address _authorizedAddress, uint256 _cosigner) external onlyInvoked { // TODO: Allowing a signer to remove itself is actually pretty terrible; it could result in the user // removing their only available authorized key. Unfortunately, due to how the invocation forwarding // works, we don't actually _know_ which signer was used to call this method, so there's no easy way // to prevent this. // TODO: Allowing the backup key to be set as an authorized address bypasses the recovery mechanisms. // Dapper can prevent this with offchain logic and the cosigner, but it would be nice to have // this enforced by the smart contract logic itself. require(_authorizedAddress != address(0), "Authorized addresses must not be zero."); require(_authorizedAddress != recoveryAddress, "Do not use the recovery address as an authorized address."); require(address(_cosigner) == address(0) || address(_cosigner) != recoveryAddress, "Do not use the recovery address as a cosigner."); authorizations[authVersion + uint256(_authorizedAddress)] = _cosigner; emit Authorized(_authorizedAddress, _cosigner); } /// @notice Performs an emergency recovery operation, removing all existing authorizations and setting /// a sole new authorized address with optional cosigner. THIS IS A SCORCHED EARTH SOLUTION, and great /// care should be taken to ensure that this method is never called unless it is a last resort. See the /// comments above about the proper kinds of addresses to use as the recoveryAddress to ensure this method /// is not trivially abused. /// @param _authorizedAddress the new and sole authorized address /// @param _cosigner the corresponding cosigner address, can be equal to _authorizedAddress function emergencyRecovery(address _authorizedAddress, uint256 _cosigner) external onlyRecoveryAddress { require(_authorizedAddress != address(0), "Authorized addresses must not be zero."); require(_authorizedAddress != recoveryAddress, "Do not use the recovery address as an authorized address."); require(address(_cosigner) != address(0), "The cosigner must not be zero."); // Incrementing the authVersion number effectively erases the authorizations mapping. See the comments // on the authorizations variable (above) for more information. authVersion += AUTH_VERSION_INCREMENTOR; // Store the new signer/cosigner pair as the only remaining authorized address authorizations[authVersion + uint256(_authorizedAddress)] = _cosigner; emit EmergencyRecovery(_authorizedAddress, _cosigner); } /// @notice Sets the recovery address, which can be zero (indicating that no recovery is possible) /// Can be updated by any authorized address. This address should be set with GREAT CARE. See the /// comments above about the proper kinds of addresses to use as the recoveryAddress to ensure this /// mechanism is not trivially abused. /// @dev Must be called through `invoke()` /// @param _recoveryAddress the new recovery address function setRecoveryAddress(address _recoveryAddress) external onlyInvoked { require( address(authorizations[authVersion + uint256(_recoveryAddress)]) == address(0), "Do not use an authorized address as the recovery address." ); address previous = recoveryAddress; recoveryAddress = _recoveryAddress; emit RecoveryAddressChanged(previous, recoveryAddress); } /// @notice Allows ANY caller to recover gas by way of deleting old authorization keys after /// a recovery operation. Anyone can call this method to delete the old unused storage and /// get themselves a bit of gas refund in the bargin. /// @dev keys must be known to caller or else nothing is refunded /// @param _version the version of the mapping which you want to delete (unshifted) /// @param _keys the authorization keys to delete function recoverGas(uint256 _version, address[] calldata _keys) external { // TODO: should this be 0xffffffffffffffffffffffff ? require(_version > 0 && _version < 0xffffffff, "Invalid version number."); uint256 shiftedVersion = _version << 160; require(shiftedVersion < authVersion, "You can only recover gas from expired authVersions."); for (uint256 i = 0; i < _keys.length; ++i) { delete(authorizations[shiftedVersion + uint256(_keys[i])]); } } /// @notice Should return whether the signature provided is valid for the provided data /// See https://github.com/ethereum/EIPs/issues/1271 /// @dev This function meets the following conditions as per the EIP: /// MUST return the bytes4 magic value `0x1626ba7e` when function passes. /// MUST NOT modify state (using `STATICCALL` for solc < 0.5, `view` modifier for solc > 0.5) /// MUST allow external calls /// @param hash A 32 byte hash of the signed data. The actual hash that is hashed however is the /// the following tightly packed arguments: `0x19,0x0,wallet_address,hash` /// @param _signature Signature byte array associated with `_data` /// @return Magic value `0x1626ba7e` upon success, 0 otherwise. function isValidSignature(bytes32 hash, bytes calldata _signature) external view returns (bytes4) { // We 'hash the hash' for the following reasons: // 1. `hash` is not the hash of an Ethereum transaction // 2. signature must target this wallet to avoid replaying the signature for another wallet // with the same key // 3. Gnosis does something similar: // https://github.com/gnosis/safe-contracts/blob/102e632d051650b7c4b0a822123f449beaf95aed/contracts/GnosisSafe.sol bytes32 operationHash = keccak256( abi.encodePacked( EIP191_PREFIX, EIP191_VERSION_DATA, this, hash)); bytes32[2] memory r; bytes32[2] memory s; uint8[2] memory v; address signer; address cosigner; // extract 1 or 2 signatures depending on length if (_signature.length == 65) { (r[0], s[0], v[0]) = _signature.extractSignature(0); signer = ecrecover(operationHash, v[0], r[0], s[0]); cosigner = signer; } else if (_signature.length == 130) { (r[0], s[0], v[0]) = _signature.extractSignature(0); (r[1], s[1], v[1]) = _signature.extractSignature(65); signer = ecrecover(operationHash, v[0], r[0], s[0]); cosigner = ecrecover(operationHash, v[1], r[1], s[1]); } else { return 0; } // check for valid signature if (signer == address(0)) { return 0; } // check for valid signature if (cosigner == address(0)) { return 0; } // check to see if this is an authorized key if (address(authorizations[authVersion + uint256(signer)]) != cosigner) { return 0; } return ERC1271_VALIDSIGNATURE; } /// @notice Query if this contract implements an interface. This function takes into account /// interfaces we implement dynamically through delegates. For interfaces that are just a /// single method, using `setDelegate` will result in that method's ID returning true from /// `supportsInterface`. For composite interfaces that are composed of multiple functions, it is /// necessary to add the interface ID manually with `setDelegate(interfaceID, /// COMPOSITE_PLACEHOLDER)` /// IN ADDITION to adding each function of the interface as usual. /// @param interfaceID The interface identifier, as specified in ERC-165 /// @dev Interface identification is specified in ERC-165. This function /// uses less than 30,000 gas. /// @return `true` if the contract implements `interfaceID` and /// `interfaceID` is not 0xffffffff, `false` otherwise function supportsInterface(bytes4 interfaceID) external view returns (bool) { // First check if the ID matches one of the interfaces we support statically. if ( interfaceID == this.supportsInterface.selector || // ERC165 interfaceID == ERC721_RECEIVED_FINAL || // ERC721 Final interfaceID == ERC721_RECEIVED_DRAFT || // ERC721 Draft interfaceID == ERC223_ID || // ERC223 interfaceID == ERC1271_VALIDSIGNATURE // ERC1271 ) { return true; } // If we don't support the interface statically, check whether we have added // dynamic support for it. return uint256(delegates[interfaceID]) > 0; } /// @notice A version of `invoke()` that has no explicit signatures, and uses msg.sender /// as both the signer and cosigner. Will only succeed if `msg.sender` is an authorized /// signer for this wallet, with no cosigner, saving transaction size and gas in that case. /// @param data The data containing the transactions to be invoked; see internalInvoke for details. function invoke0(bytes calldata data) external { // The nonce doesn't need to be incremented for transactions that don't include explicit signatures; // the built-in nonce of the native ethereum transaction will protect against replay attacks, and we // can save the gas that would be spent updating the nonce variable // The operation should be approved if the signer address has no cosigner (i.e. signer == cosigner) require(address(authorizations[authVersion + uint256(msg.sender)]) == msg.sender, "Invalid authorization."); internalInvoke(0, data); } /// @notice A version of `invoke()` that has one explicit signature which is used to derive the authorized /// address. Uses `msg.sender` as the cosigner. /// @param v the v value for the signature; see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md /// @param r the r value for the signature /// @param s the s value for the signature /// @param nonce the nonce value for the signature /// @param authorizedAddress the address of the authorization key; this is used here so that cosigner signatures are interchangeable /// between this function and `invoke2()` /// @param data The data containing the transactions to be invoked; see internalInvoke for details. function invoke1CosignerSends(uint8 v, bytes32 r, bytes32 s, uint256 nonce, address authorizedAddress, bytes calldata data) external { // check signature version require(v == 27 || v == 28, "Invalid signature version."); // calculate hash bytes32 operationHash = keccak256( abi.encodePacked( EIP191_PREFIX, EIP191_VERSION_DATA, this, nonce, authorizedAddress, data)); // recover signer address signer = ecrecover(operationHash, v, r, s); // check for valid signature require(signer != address(0), "Invalid signature."); // check nonce require(nonce == nonces[signer], "must use correct nonce"); // check signer require(signer == authorizedAddress, "authorized addresses must be equal"); // Get cosigner address requiredCosigner = address(authorizations[authVersion + uint256(signer)]); // The operation should be approved if the signer address has no cosigner (i.e. signer == cosigner) or // if the actual cosigner matches the required cosigner. require(requiredCosigner == signer || requiredCosigner == msg.sender, "Invalid authorization."); // increment nonce to prevent replay attacks nonces[signer] = nonce + 1; // call internal function internalInvoke(operationHash, data); } /// @notice A version of `invoke()` that has one explicit signature which is used to derive the cosigning /// address. Uses `msg.sender` as the authorized address. /// @param v the v value for the signature; see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md /// @param r the r value for the signature /// @param s the s value for the signature /// @param data The data containing the transactions to be invoked; see internalInvoke for details. function invoke1SignerSends(uint8 v, bytes32 r, bytes32 s, bytes calldata data) external { // check signature version // `ecrecover` will in fact return 0 if given invalid // so perhaps this check is redundant require(v == 27 || v == 28, "Invalid signature version."); uint256 nonce = nonces[msg.sender]; // calculate hash bytes32 operationHash = keccak256( abi.encodePacked( EIP191_PREFIX, EIP191_VERSION_DATA, this, nonce, msg.sender, data)); // recover cosigner address cosigner = ecrecover(operationHash, v, r, s); // check for valid signature require(cosigner != address(0), "Invalid signature."); // Get required cosigner address requiredCosigner = address(authorizations[authVersion + uint256(msg.sender)]); // The operation should be approved if the signer address has no cosigner (i.e. signer == cosigner) or // if the actual cosigner matches the required cosigner. require(requiredCosigner == cosigner || requiredCosigner == msg.sender, "Invalid authorization."); // increment nonce to prevent replay attacks nonces[msg.sender] = nonce + 1; internalInvoke(operationHash, data); } /// @notice A version of `invoke()` that has two explicit signatures, the first is used to derive the authorized /// address, the second to derive the cosigner. The value of `msg.sender` is ignored. /// @param v the v values for the signatures /// @param r the r values for the signatures /// @param s the s values for the signatures /// @param nonce the nonce value for the signature /// @param authorizedAddress the address of the signer; forces the signature to be unique and tied to the signers nonce /// @param data The data containing the transactions to be invoked; see internalInvoke for details. function invoke2(uint8[2] calldata v, bytes32[2] calldata r, bytes32[2] calldata s, uint256 nonce, address authorizedAddress, bytes calldata data) external { // check signature versions // `ecrecover` will infact return 0 if given invalid // so perhaps these checks are redundant require(v[0] == 27 || v[0] == 28, "invalid signature version v[0]"); require(v[1] == 27 || v[1] == 28, "invalid signature version v[1]"); bytes32 operationHash = keccak256( abi.encodePacked( EIP191_PREFIX, EIP191_VERSION_DATA, this, nonce, authorizedAddress, data)); // recover signer and cosigner address signer = ecrecover(operationHash, v[0], r[0], s[0]); address cosigner = ecrecover(operationHash, v[1], r[1], s[1]); // check for valid signatures require(signer != address(0), "Invalid signature for signer."); require(cosigner != address(0), "Invalid signature for cosigner."); // check signer address require(signer == authorizedAddress, "authorized addresses must be equal"); // check nonces require(nonce == nonces[signer], "must use correct nonce for signer"); // Get Mapping address requiredCosigner = address(authorizations[authVersion + uint256(signer)]); // The operation should be approved if the signer address has no cosigner (i.e. signer == cosigner) or // if the actual cosigner matches the required cosigner. require(requiredCosigner == signer || requiredCosigner == cosigner, "Invalid authorization."); // increment nonce to prevent replay attacks nonces[signer]++; internalInvoke(operationHash, data); } /// @dev Internal invoke call, /// @param operationHash The hash of the operation /// @param data The data to send to the `call()` operation /// The data is prefixed with a global 1 byte revert flag /// If revert is 1, then any revert from a `call()` operation is rethrown. /// Otherwise, the error is recorded in the `result` field of the `InvocationSuccess` event. /// Immediately following the revert byte (no padding), the data format is then is a series /// of 1 or more tightly packed tuples: /// `<target(20),amount(32),datalength(32),data>` /// If `datalength == 0`, the data field must be omitted function internalInvoke(bytes32 operationHash, bytes memory data) internal { // keep track of the number of operations processed uint256 numOps; // keep track of the result of each operation as a bit uint256 result; // We need to store a reference to this string as a variable so we can use it as an argument to // the revert call from assembly. string memory invalidLengthMessage = "Data field too short"; string memory callFailed = "Call failed"; // At an absolute minimum, the data field must be at least 85 bytes // <revert(1), to_address(20), value(32), data_length(32)> require(data.length >= 85, invalidLengthMessage); // Forward the call onto its actual target. Note that the target address can be `self` here, which is // actually the required flow for modifying the configuration of the authorized keys and recovery address. // // The assembly code below loads data directly from memory, so the enclosing function must be marked `internal` assembly { // A cursor pointing to the revert flag, starts after the length field of the data object let memPtr := add(data, 32) // The revert flag is the leftmost byte from memPtr let revertFlag := byte(0, mload(memPtr)) // A pointer to the end of the data object let endPtr := add(memPtr, mload(data)) // Now, memPtr is a cursor pointing to the beginning of the current sub-operation memPtr := add(memPtr, 1) // Loop through data, parsing out the various sub-operations for { } lt(memPtr, endPtr) { } { // Load the length of the call data of the current operation // 52 = to(20) + value(32) let len := mload(add(memPtr, 52)) // Compute a pointer to the end of the current operation // 84 = to(20) + value(32) + size(32) let opEnd := add(len, add(memPtr, 84)) // Bail if the current operation's data overruns the end of the enclosing data buffer // NOTE: Comment out this bit of code and uncomment the next section if you want // the solidity-coverage tool to work. // See https://github.com/sc-forks/solidity-coverage/issues/287 if gt(opEnd, endPtr) { // The computed end of this operation goes past the end of the data buffer. Not good! revert(add(invalidLengthMessage, 32), mload(invalidLengthMessage)) } // NOTE: Code that is compatible with solidity-coverage // switch gt(opEnd, endPtr) // case 1 { // revert(add(invalidLengthMessage, 32), mload(invalidLengthMessage)) // } // This line of code packs in a lot of functionality! // - load the target address from memPtr, the address is only 20-bytes but mload always grabs 32-bytes, // so we have to shr by 12 bytes. // - load the value field, stored at memPtr+20 // - pass a pointer to the call data, stored at memPtr+84 // - use the previously loaded len field as the size of the call data // - make the call (passing all remaining gas to the child call) // - check the result (0 == reverted) if eq(0, call(gas, shr(96, mload(memPtr)), mload(add(memPtr, 20)), add(memPtr, 84), len, 0, 0)) { switch revertFlag case 1 { revert(add(callFailed, 32), mload(callFailed)) } default { // mark this operation as failed // create the appropriate bit, 'or' with previous result := or(result, exp(2, numOps)) } } // increment our counter numOps := add(numOps, 1) // Update mem pointer to point to the next sub-operation memPtr := opEnd } } // emit single event upon success emit InvocationSuccess(operationHash, result, numOps); } } // File: contracts/Wallet/CloneableWallet.sol pragma solidity ^0.5.10; /// @title Cloneable Wallet /// @notice This contract represents a complete but non working wallet. /// It is meant to be deployed and serve as the contract that you clone /// in an EIP 1167 clone setup. /// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1167.md /// @dev Currently, we are seeing approximatley 933 gas overhead for using /// the clone wallet; use `FullWallet` if you think users will overtake /// the transaction threshold over the lifetime of the wallet. contract CloneableWallet is CoreWallet { /// @dev An empty constructor that deploys a NON-FUNCTIONAL version /// of `CoreWallet` constructor () public { initialized = true; } } // File: contracts/Ownership/Ownable.sol pragma solidity ^0.5.10; /// @title Ownable is for contracts that can be owned. /// @dev The Ownable contract keeps track of an owner address, /// and provides basic authorization functions. contract Ownable { /// @dev the owner of the contract address public owner; /// @dev Fired when the owner to renounce ownership, leaving no one /// as the owner. /// @param previousOwner The previous `owner` of this contract event OwnershipRenounced(address indexed previousOwner); /// @dev Fired when the owner to changes ownership /// @param previousOwner The previous `owner` /// @param newOwner The new `owner` event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /// @dev sets the `owner` to `msg.sender` constructor() public { owner = msg.sender; } /// @dev Throws if the `msg.sender` is not the current `owner` modifier onlyOwner() { require(msg.sender == owner, "must be owner"); _; } /// @dev Allows the current `owner` to renounce ownership function renounceOwnership() external onlyOwner { emit OwnershipRenounced(owner); owner = address(0); } /// @dev Allows the current `owner` to transfer ownership /// @param _newOwner The new `owner` function transferOwnership(address _newOwner) external onlyOwner { _transferOwnership(_newOwner); } /// @dev Internal version of `transferOwnership` /// @param _newOwner The new `owner` function _transferOwnership(address _newOwner) internal { require(_newOwner != address(0), "cannot renounce ownership"); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } } // File: contracts/Ownership/HasNoEther.sol pragma solidity ^0.5.10; /// @title HasNoEther is for contracts that should not own Ether contract HasNoEther is Ownable { /// @dev This contructor rejects incoming Ether constructor() public payable { require(msg.value == 0, "must not send Ether"); } /// @dev Disallows direct send by default function not being `payable` function() external {} /// @dev Transfers all Ether held by this contract to the owner. function reclaimEther() external onlyOwner { msg.sender.transfer(address(this).balance); } } // File: contracts/WalletFactory/CloneFactory.sol pragma solidity ^0.5.10; /// @title CloneFactory - a contract that creates clones /// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1167.md /// @dev See https://github.com/optionality/clone-factory/blob/master/contracts/CloneFactory.sol contract CloneFactory { event CloneCreated(address indexed target, address clone); function createClone(address target) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { let clone := mload(0x40) mstore(clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000) mstore(add(clone, 0x14), targetBytes) mstore(add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000) result := create(0, clone, 0x37) } } function createClone2(address target, bytes32 salt) internal returns (address payable result) { bytes20 targetBytes = bytes20(target); assembly { let clone := mload(0x40) mstore(clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000) mstore(add(clone, 0x14), targetBytes) mstore(add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000) result := create2(0, clone, 0x37, salt) } } } // File: contracts/WalletFactory/FullWalletByteCode.sol pragma solidity ^0.5.10; /// @title FullWalletByteCode /// @dev A contract containing the FullWallet bytecode, for use in deployment. contract FullWalletByteCode { /// @notice This is the raw bytecode of the full wallet. It is encoded here as a raw byte /// array to support deployment with CREATE2, as Solidity's 'new' constructor system does /// not support CREATE2 yet. /// /// NOTE: Be sure to update this whenever the wallet bytecode changes! /// Simply run `npm run build` and then copy the `"bytecode"` /// portion from the `build/contracts/FullWallet.json` file to here, /// then append 64x3 0's. bytes constant fullWalletBytecode = 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} // File: contracts/WalletFactory/WalletFactory.sol pragma solidity ^0.5.10; /// @title WalletFactory /// @dev A contract for creating wallets. contract WalletFactory is FullWalletByteCode, HasNoEther, CloneFactory { /// @dev Pointer to a pre-deployed instance of the Wallet contract. This /// deployment contains all the Wallet code. address public cloneWalletAddress; /// @notice Emitted whenever a wallet is created /// @param wallet The address of the wallet created /// @param authorizedAddress The initial authorized address of the wallet /// @param full `true` if the deployed wallet was a full, self /// contained wallet; `false` if the wallet is a clone wallet event WalletCreated(address wallet, address authorizedAddress, bool full); constructor(address _cloneWalletAddress) public { cloneWalletAddress = _cloneWalletAddress; } /// @notice Used to deploy a wallet clone /// @dev Reasonably cheap to run (~100K gas) /// @param _recoveryAddress the initial recovery address for the wallet /// @param _authorizedAddress an initial authorized address for the wallet /// @param _cosigner the cosigning address for the initial `_authorizedAddress` function deployCloneWallet( address _recoveryAddress, address _authorizedAddress, uint256 _cosigner ) public { // create the clone address payable clone = createClone(cloneWalletAddress); // init the clone CloneableWallet(clone).init(_authorizedAddress, _cosigner, _recoveryAddress); // emit event emit WalletCreated(clone, _authorizedAddress, false); } /// @notice Used to deploy a wallet clone /// @dev Reasonably cheap to run (~100K gas) /// @dev The clone does not require `onlyOwner` as we avoid front-running /// attacks by hashing the salt combined with the call arguments and using /// that as the salt we provide to `create2`. Given this constraint, a /// front-runner would need to use the same `_recoveryAddress`, `_authorizedAddress`, /// and `_cosigner` parameters as the original deployer, so the original deployer /// would have control of the wallet even if the transaction was front-run. /// @param _recoveryAddress the initial recovery address for the wallet /// @param _authorizedAddress an initial authorized address for the wallet /// @param _cosigner the cosigning address for the initial `_authorizedAddress` /// @param _salt the salt for the `create2` instruction function deployCloneWallet2( address _recoveryAddress, address _authorizedAddress, uint256 _cosigner, bytes32 _salt ) public { // calculate our own salt based off of args bytes32 salt = keccak256(abi.encodePacked(_salt, _authorizedAddress, _cosigner, _recoveryAddress)); // create the clone counterfactually address payable clone = createClone2(cloneWalletAddress, salt); // ensure we get an address require(clone != address(0), "wallet must have address"); // check size uint256 size; // note this takes an additional 700 gas assembly { size := extcodesize(clone) } require(size > 0, "wallet must have code"); // init the clone CloneableWallet(clone).init(_authorizedAddress, _cosigner, _recoveryAddress); // emit event emit WalletCreated(clone, _authorizedAddress, false); } /// @notice Used to deploy a full wallet /// @dev This is potentially very gas intensive! /// @param _recoveryAddress The initial recovery address for the wallet /// @param _authorizedAddress An initial authorized address for the wallet /// @param _cosigner The cosigning address for the initial `_authorizedAddress` function deployFullWallet( address _recoveryAddress, address _authorizedAddress, uint256 _cosigner ) public { // Copy the bytecode of the full wallet to memory. bytes memory fullWallet = fullWalletBytecode; address full; assembly { // get start of wallet buffer let startPtr := add(fullWallet, 0x20) // get start of arguments let endPtr := sub(add(startPtr, mload(fullWallet)), 0x60) // copy constructor parameters to memory mstore(endPtr, _authorizedAddress) mstore(add(endPtr, 0x20), _cosigner) mstore(add(endPtr, 0x40), _recoveryAddress) // create the contract full := create(0, startPtr, mload(fullWallet)) } // check address require(full != address(0), "wallet must have address"); // check size uint256 size; // note this takes an additional 700 gas, // which is a relatively small amount in this case assembly { size := extcodesize(full) } require(size > 0, "wallet must have code"); emit WalletCreated(full, _authorizedAddress, true); } /// @notice Used to deploy a full wallet counterfactually /// @dev This is potentially very gas intensive! /// @dev As the arguments are appended to the end of the bytecode and /// then included in the `create2` call, we are safe from front running /// attacks and do not need to restrict the caller of this function. /// @param _recoveryAddress The initial recovery address for the wallet /// @param _authorizedAddress An initial authorized address for the wallet /// @param _cosigner The cosigning address for the initial `_authorizedAddress` /// @param _salt The salt for the `create2` instruction function deployFullWallet2( address _recoveryAddress, address _authorizedAddress, uint256 _cosigner, bytes32 _salt ) public { // Note: Be sure to update this whenever the wallet bytecode changes! // Simply run `yarn run build` and then copy the `"bytecode"` // portion from the `build/contracts/FullWallet.json` file to here, // then append 64x3 0's. // // Note: By not passing in the code as an argument, we save 600,000 gas. // An alternative would be to use `extcodecopy`, but again we save // gas by not having to call `extcodecopy`. bytes memory fullWallet = fullWalletBytecode; address full; assembly { // get start of wallet buffer let startPtr := add(fullWallet, 0x20) // get start of arguments let endPtr := sub(add(startPtr, mload(fullWallet)), 0x60) // copy constructor parameters to memory mstore(endPtr, _authorizedAddress) mstore(add(endPtr, 0x20), _cosigner) mstore(add(endPtr, 0x40), _recoveryAddress) // create the contract using create2 full := create2(0, startPtr, mload(fullWallet), _salt) } // check address require(full != address(0), "wallet must have address"); // check size uint256 size; // note this takes an additional 700 gas, // which is a relatively small amount in this case assembly { size := extcodesize(full) } require(size > 0, "wallet must have code"); emit WalletCreated(full, _authorizedAddress, true); } }
Contract Security Audit
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Contract ABI
API[{"constant":false,"inputs":[{"name":"_recoveryAddress","type":"address"},{"name":"_authorizedAddress","type":"address"},{"name":"_cosigner","type":"uint256"}],"name":"deployCloneWallet","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_recoveryAddress","type":"address"},{"name":"_authorizedAddress","type":"address"},{"name":"_cosigner","type":"uint256"}],"name":"deployFullWallet","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"reclaimEther","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_recoveryAddress","type":"address"},{"name":"_authorizedAddress","type":"address"},{"name":"_cosigner","type":"uint256"},{"name":"_salt","type":"bytes32"}],"name":"deployFullWallet2","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"cloneWalletAddress","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_recoveryAddress","type":"address"},{"name":"_authorizedAddress","type":"address"},{"name":"_cosigner","type":"uint256"},{"name":"_salt","type":"bytes32"}],"name":"deployCloneWallet2","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_cloneWalletAddress","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":false,"stateMutability":"nonpayable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"wallet","type":"address"},{"indexed":false,"name":"authorizedAddress","type":"address"},{"indexed":false,"name":"full","type":"bool"}],"name":"WalletCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"target","type":"address"},{"indexed":false,"name":"clone","type":"address"}],"name":"CloneCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"}],"name":"OwnershipRenounced","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000989A2ad9aCaa8C4e50B2fC6B650d6e1809b9195b
-----Decoded View---------------
Arg [0] : _cloneWalletAddress (address): 0x989A2ad9aCaa8C4e50B2fC6B650d6e1809b9195b
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000989A2ad9aCaa8C4e50B2fC6B650d6e1809b9195b
Deployed Bytecode Sourcemap
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Swarm Source
bzzr://256c24608189ae4019bd0d010f7fbc174cdd9db1c66ad50b76c01e8f02a26327
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Multichain Portfolio | 34 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.