Created
July 26, 2022 08:19
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// SPDX-License-Identifier: GPL-3.0 | |
pragma solidity 0.8.7; | |
contract Multisig { | |
uint256 minSignatures = 3; | |
address private contractOwner; | |
mapping(address => bool) private owners; | |
struct Transaction { | |
address to; | |
uint256 amount; | |
uint256 createdAt; | |
uint256 sentAt; | |
uint256 signatureCount; | |
mapping(address => bool) signatures; | |
} | |
mapping(uint256 => Transaction) transactions; | |
uint256[] public pendingTransactionIds; | |
uint256 private currentTransactionId = 0; | |
constructor() payable { | |
contractOwner = msg.sender; | |
owners[msg.sender] = true; | |
} | |
modifier isOwner() { | |
require(owners[msg.sender], "You are not the owner"); | |
_; | |
} | |
function addOwner(address newOwner) public { | |
require(contractOwner == msg.sender, "You are not the owner"); | |
owners[newOwner] = true; | |
} | |
function removeOwner(address addr) public isOwner() { | |
require(contractOwner == msg.sender, "You are not the owner"); | |
owners[addr] = false; | |
} | |
function createTransaction(address to, uint256 amount) public isOwner() returns(uint256) { | |
uint256 currentBalance = address(this).balance; | |
require(amount <= currentBalance, "Account balance is not enough"); | |
uint256 transactionId = currentTransactionId; | |
Transaction storage newTransaction = transactions[transactionId]; | |
newTransaction.to = to; | |
newTransaction.amount = amount; | |
newTransaction.createdAt = block.timestamp; | |
newTransaction.sentAt = 0; | |
newTransaction.signatureCount = 0; | |
pendingTransactionIds.push(transactionId); | |
currentTransactionId += 1; | |
return transactionId; | |
} | |
function signTransaction(uint256 tranactionId) public isOwner() { | |
Transaction storage currentTransaction = transactions[tranactionId]; | |
require(currentTransaction.sentAt == 0, "This transaction has executed"); | |
require(currentTransaction.signatures[msg.sender] == false, "You have signed the transaction"); | |
currentTransaction.signatures[msg.sender] = true; | |
currentTransaction.signatureCount += 1; | |
if (currentTransaction.signatureCount >= minSignatures) { | |
payable(currentTransaction.to).transfer(currentTransaction.amount); | |
currentTransaction.sentAt = block.timestamp; | |
for (uint256 i=0; i<pendingTransactionIds.length; i++) { | |
if (pendingTransactionIds[i] == tranactionId) { | |
delete pendingTransactionIds[i]; | |
break; | |
} | |
} | |
} | |
} | |
} |
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