Address Contract Partially Verified
Address
0x0C6635509b9Cd216149201C50ECe0Fe843E97552
Balance
642.8862 ETH
Nonce
1
Code Size
9008 bytes
Creator
0x3B396FEc...ca7E at tx 0xa88e0f2d...5ee514
Indexed Transactions
0
Contract Bytecode
9008 bytes
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Verified Source Code Partial Match
Compiler: v0.5.8+commit.23d335f2
EVM: petersburg
Optimization: No
MultiSigWallet.sol 393 lines
pragma solidity ^0.5.0; /// @title Multisignature wallet - Allows multiple parties to agree on transactions before execution. /// @author Stefan George - <[email protected]> contract MultiSigWallet { /* * Events */ event Confirmation(address indexed sender, uint indexed transactionId); event Revocation(address indexed sender, uint indexed transactionId); event Submission(uint indexed transactionId); event Execution(uint indexed transactionId); event ExecutionFailure(uint indexed transactionId); event Deposit(address indexed sender, uint value); event OwnerAddition(address indexed owner); event OwnerRemoval(address indexed owner); event RequirementChange(uint required); /* * Constants */ uint constant public MAX_OWNER_COUNT = 50; /* * Storage */ mapping (uint => Transaction) public transactions; mapping (uint => mapping (address => bool)) public confirmations; mapping (address => bool) public isOwner; address[] public owners; uint public required; uint public transactionCount; struct Transaction { address destination; uint value; bytes data; bool executed; } /* * Modifiers */ modifier onlyWallet() { require(msg.sender == address(this)); _; } modifier ownerDoesNotExist(address owner) { require(!isOwner[owner]); _; } modifier ownerExists(address owner) { require(isOwner[owner]); _; } modifier transactionExists(uint transactionId) { require(transactions[transactionId].destination != address(0)); _; } modifier confirmed(uint transactionId, address owner) { require(confirmations[transactionId][owner]); _; } modifier notConfirmed(uint transactionId, address owner) { require(!confirmations[transactionId][owner]); _; } modifier notExecuted(uint transactionId) { require(!transactions[transactionId].executed); _; } modifier notNull(address _address) { require(_address != address(0)); _; } modifier validRequirement(uint ownerCount, uint _required) { require(ownerCount <= MAX_OWNER_COUNT && _required <= ownerCount && _required != 0 && ownerCount != 0); _; } /// @dev Fallback function allows to deposit ether. function() external payable { if (msg.value > 0) emit Deposit(msg.sender, msg.value); } /* * Public functions */ /// @dev Contract constructor sets initial owners and required number of confirmations. /// @param _owners List of initial owners. /// @param _required Number of required confirmations. constructor (address[] memory _owners, uint _required) public validRequirement(_owners.length, _required) { for (uint i = 0; i < _owners.length; i++) { require(!isOwner[_owners[i]] && _owners[i] != address(0)); isOwner[_owners[i]] = true; } owners = _owners; required = _required; } /// @dev Allows to add a new owner. Transaction has to be sent by wallet. /// @param owner Address of new owner. function addOwner(address owner) public onlyWallet ownerDoesNotExist(owner) notNull(owner) validRequirement(owners.length + 1, required) { isOwner[owner] = true; owners.push(owner); emit OwnerAddition(owner); } /// @dev Allows to remove an owner. Transaction has to be sent by wallet. /// @param owner Address of owner. function removeOwner(address owner) public onlyWallet ownerExists(owner) { isOwner[owner] = false; for (uint i = 0; i < owners.length - 1; i++) if (owners[i] == owner) { owners[i] = owners[owners.length - 1]; break; } owners.length -= 1; if (required > owners.length) changeRequirement(owners.length); emit OwnerRemoval(owner); } /// @dev Allows to replace an owner with a new owner. Transaction has to be sent by wallet. /// @param owner Address of owner to be replaced. /// @param newOwner Address of new owner. function replaceOwner(address owner, address newOwner) public onlyWallet ownerExists(owner) ownerDoesNotExist(newOwner) { for (uint i = 0; i < owners.length; i++) if (owners[i] == owner) { owners[i] = newOwner; break; } isOwner[owner] = false; isOwner[newOwner] = true; emit OwnerRemoval(owner); emit OwnerAddition(newOwner); } /// @dev Allows to change the number of required confirmations. Transaction has to be sent by wallet. /// @param _required Number of required confirmations. function changeRequirement(uint _required) public onlyWallet validRequirement(owners.length, _required) { required = _required; emit RequirementChange(_required); } /// @dev Allows an owner to submit and confirm a transaction. /// @param destination Transaction target address. /// @param value Transaction ether value. /// @param data Transaction data payload. /// @return Returns transaction ID. function submitTransaction(address destination, uint value, bytes memory data) public returns (uint transactionId) { transactionId = addTransaction(destination, value, data); confirmTransaction(transactionId); } /// @dev Allows an owner to confirm a transaction. /// @param transactionId Transaction ID. function confirmTransaction(uint transactionId) public ownerExists(msg.sender) transactionExists(transactionId) notConfirmed(transactionId, msg.sender) { confirmations[transactionId][msg.sender] = true; emit Confirmation(msg.sender, transactionId); executeTransaction(transactionId); } /// @dev Allows an owner to revoke a confirmation for a transaction. /// @param transactionId Transaction ID. function revokeConfirmation(uint transactionId) public ownerExists(msg.sender) confirmed(transactionId, msg.sender) notExecuted(transactionId) { confirmations[transactionId][msg.sender] = false; emit Revocation(msg.sender, transactionId); } /// @dev Allows anyone to execute a confirmed transaction. /// @param transactionId Transaction ID. function executeTransaction(uint transactionId) public ownerExists(msg.sender) confirmed(transactionId, msg.sender) notExecuted(transactionId) { if (isConfirmed(transactionId)) { Transaction storage txn = transactions[transactionId]; txn.executed = true; if (external_call(txn.destination, txn.value, txn.data.length, txn.data)) emit Execution(transactionId); else { emit ExecutionFailure(transactionId); txn.executed = false; } } } // call has been separated into its own function in order to take advantage // of the Solidity's code generator to produce a loop that copies tx.data into memory. function external_call(address destination, uint value, uint dataLength, bytes memory data) internal returns (bool) { bool result; assembly { let x := mload(0x40) // "Allocate" memory for output (0x40 is where "free memory" pointer is stored by convention) let d := add(data, 32) // First 32 bytes are the padded length of data, so exclude that result := call( sub(gas, 34710), // 34710 is the value that solidity is currently emitting // It includes callGas (700) + callVeryLow (3, to pay for SUB) + callValueTransferGas (9000) + // callNewAccountGas (25000, in case the destination address does not exist and needs creating) destination, value, d, dataLength, // Size of the input (in bytes) - this is what fixes the padding problem x, 0 // Output is ignored, therefore the output size is zero ) } return result; } /// @dev Returns the confirmation status of a transaction. /// @param transactionId Transaction ID. /// @return Confirmation status. function isConfirmed(uint transactionId) public view returns (bool) { uint count = 0; for (uint i = 0; i < owners.length; i++) { if (confirmations[transactionId][owners[i]]) count += 1; if (count == required) return true; } } /* * Internal functions */ /// @dev Adds a new transaction to the transaction mapping, if transaction does not exist yet. /// @param destination Transaction target address. /// @param value Transaction ether value. /// @param data Transaction data payload. /// @return Returns transaction ID. function addTransaction(address destination, uint value, bytes memory data) internal notNull(destination) returns (uint transactionId) { transactionId = transactionCount; transactions[transactionId] = Transaction({ destination: destination, value: value, data: data, executed: false }); transactionCount += 1; emit Submission(transactionId); } /* * Web3 call functions */ /// @dev Returns number of confirmations of a transaction. /// @param transactionId Transaction ID. /// @return Number of confirmations. function getConfirmationCount(uint transactionId) public view returns (uint count) { for (uint i = 0; i < owners.length; i++) if (confirmations[transactionId][owners[i]]) count += 1; } /// @dev Returns total number of transactions after filers are applied. /// @param pending Include pending transactions. /// @param executed Include executed transactions. /// @return Total number of transactions after filters are applied. function getTransactionCount(bool pending, bool executed) public view returns (uint count) { for (uint i = 0; i < transactionCount; i++) if ( pending && !transactions[i].executed || executed && transactions[i].executed) count += 1; } /// @dev Returns list of owners. /// @return List of owner addresses. function getOwners() public view returns (address[] memory) { return owners; } /// @dev Returns array with owner addresses, which confirmed transaction. /// @param transactionId Transaction ID. /// @return Returns array of owner addresses. function getConfirmations(uint transactionId) public view returns (address[] memory _confirmations) { address[] memory confirmationsTemp = new address[](owners.length); uint count = 0; uint i; for (i = 0; i < owners.length; i++) if (confirmations[transactionId][owners[i]]) { confirmationsTemp[count] = owners[i]; count += 1; } _confirmations = new address[](count); for (i = 0; i < count; i++) _confirmations[i] = confirmationsTemp[i]; } /// @dev Returns list of transaction IDs in defined range. /// @param from Index start position of transaction array. /// @param to Index end position of transaction array. /// @param pending Include pending transactions. /// @param executed Include executed transactions. /// @return Returns array of transaction IDs. function getTransactionIds(uint from, uint to, bool pending, bool executed) public view returns (uint[] memory _transactionIds) { uint[] memory transactionIdsTemp = new uint[](transactionCount); uint count = 0; uint i; for (i = 0; i < transactionCount; i++) if ( pending && !transactions[i].executed || executed && transactions[i].executed) { transactionIdsTemp[count] = i; count += 1; } _transactionIds = new uint[](to - from); for (i = from; i < to; i++) _transactionIds[i - from] = transactionIdsTemp[i]; } }
Read Contract
MAX_OWNER_COUNT 0xd74f8edd → uint256
confirmations 0x3411c81c → bool
getConfirmationCount 0x8b51d13f → uint256
getConfirmations 0xb5dc40c3 → address[]
getOwners 0xa0e67e2b → address[]
getTransactionCount 0x54741525 → uint256
getTransactionIds 0xa8abe69a → uint256[]
isConfirmed 0x784547a7 → bool
isOwner 0x2f54bf6e → bool
owners 0x025e7c27 → address
required 0xdc8452cd → uint256
transactionCount 0xb77bf600 → uint256
transactions 0x9ace38c2 → address, uint256, bytes, bool
Write Contract 8 functions
These functions modify contract state and require a wallet transaction to execute.
addOwner 0x7065cb48
address owner
changeRequirement 0xba51a6df
uint256 _required
confirmTransaction 0xc01a8c84
uint256 transactionId
executeTransaction 0xee22610b
uint256 transactionId
removeOwner 0x173825d9
address owner
replaceOwner 0xe20056e6
address owner
address newOwner
revokeConfirmation 0x20ea8d86
uint256 transactionId
submitTransaction 0xc6427474
address destination
uint256 value
bytes data
returns: uint256
Token Balances (7)
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