Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- MultisigWallet
- Optimization enabled
- true
- Compiler version
- v0.8.4+commit.c7e474f2
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2024-09-26T15:33:19.742042Z
Constructor Arguments
0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000500000000000000000000000056d0be152490d5797416d8073d3850855b2fca3c0000000000000000000000005248f891da4a2b5506b719d3b02d3b4f1785a298000000000000000000000000c9bea9379a8fade01240ee583535fac713b7101400000000000000000000000050016fe5de82d818ab8190b2e32115cae7c0cbf5000000000000000000000000600360f031a22213522329c41ead9f0a4d6f37ff
Contract source code
/**
*Submitted for verification at BscScan.com on 2021-08-24
*/
// SPDX-License-Identifier: No License (None)
pragma solidity ^0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
struct AddressSet {
// Storage of set values
address[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (address => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
if (!contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
address lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns 1-based index of value in the set. O(1).
*/
function indexOf(AddressSet storage set, address value) internal view returns (uint256) {
return set._indexes[value];
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
}
contract MultisigWallet {
using EnumerableSet for EnumerableSet.AddressSet;
struct Ballot {
uint128 votes; // bitmap of unique votes (max 127 votes)
uint64 expire; // time when ballot expire
uint8 yea; // number of votes `Yea`
}
EnumerableSet.AddressSet owners; // founders may transfer contract's ownership
uint256 public ownersSetCounter; // each time when change owners increase the counter
uint256 public expirePeriod = 3 days;
mapping(bytes32 => Ballot) public ballots;
event SetOwner(address owner, bool isEnable);
event CreateBallot(bytes32 ballotHash, uint256 expired);
event Execute(bytes32 ballotHash, address to, uint256 value, bytes data);
modifier onlyThis() {
require(address(this) == msg.sender, "Only multisig allowed");
_;
}
constructor (address[] memory _owners) {
for (uint i = 0; i < _owners.length; i++) {
require(_owners[i] != address(0), "Zero address");
owners.add(_owners[i]);
}
}
// get number of owners
function getOwnersNumber() external view returns(uint256) {
return owners.length();
}
// returns list of owners addresses
function getOwners() external view returns(address[] memory) {
return owners._values;
}
// add owner
function addOwner(address owner) external onlyThis{
require(owner != address(0), "Zero address");
require(owners.length() < 127, "Too many owners");
require(owners.add(owner), "Owner already added");
ownersSetCounter++; // change owners set
emit SetOwner(owner, true);
}
// remove owner
function removeOwner(address owner) external onlyThis{
require(owners.length() > 1, "Remove all owners is not allowed");
require(owners.remove(owner), "Owner does not exist");
ownersSetCounter++; // change owners set
emit SetOwner(owner, false);
}
function setExpirePeriod(uint256 period) external onlyThis {
require(period >= 1 days, "Too short period"); // avoid deadlock in case of set too short period
expirePeriod = period;
}
function vote(address to, uint256 value, bytes calldata data) external {
uint256 index = owners.indexOf(msg.sender);
require(index != 0, "Only owner");
bytes32 ballotHash = keccak256(abi.encodePacked(to, value, data, ownersSetCounter));
Ballot memory b = ballots[ballotHash];
if (b.expire == 0 || b.expire < uint64(block.timestamp)) { // if no ballot or ballot expired - create new ballot
b.expire = uint64(block.timestamp + expirePeriod);
b.votes = 0;
b.yea = 0;
emit CreateBallot(ballotHash, b.expire);
}
uint256 mask = 1 << index;
if (b.votes & mask == 0) { // this owner don't vote yet.
b.votes = uint128(b.votes | mask); // record owner's vote
b.yea += 1; // increase total votes "Yea"
}
if (b.yea >= owners.length() / 2 + 1) { // vote "Yea" > 50% of owners
delete ballots[ballotHash];
execute(to, value, data);
emit Execute(ballotHash, to, value, data);
} else {
// update ballot
ballots[ballotHash] = b;
}
}
function execute(address to, uint256 value, bytes memory data) internal {
(bool success,) = to.call{value: value}(data);
require(success, "Execute error");
}
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address[]","name":"_owners","internalType":"address[]"}]},{"type":"event","name":"CreateBallot","inputs":[{"type":"bytes32","name":"ballotHash","internalType":"bytes32","indexed":false},{"type":"uint256","name":"expired","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Execute","inputs":[{"type":"bytes32","name":"ballotHash","internalType":"bytes32","indexed":false},{"type":"address","name":"to","internalType":"address","indexed":false},{"type":"uint256","name":"value","internalType":"uint256","indexed":false},{"type":"bytes","name":"data","internalType":"bytes","indexed":false}],"anonymous":false},{"type":"event","name":"SetOwner","inputs":[{"type":"address","name":"owner","internalType":"address","indexed":false},{"type":"bool","name":"isEnable","internalType":"bool","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"addOwner","inputs":[{"type":"address","name":"owner","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint128","name":"votes","internalType":"uint128"},{"type":"uint64","name":"expire","internalType":"uint64"},{"type":"uint8","name":"yea","internalType":"uint8"}],"name":"ballots","inputs":[{"type":"bytes32","name":"","internalType":"bytes32"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"expirePeriod","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address[]","name":"","internalType":"address[]"}],"name":"getOwners","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getOwnersNumber","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"ownersSetCounter","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"removeOwner","inputs":[{"type":"address","name":"owner","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setExpirePeriod","inputs":[{"type":"uint256","name":"period","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"vote","inputs":[{"type":"address","name":"to","internalType":"address"},{"type":"uint256","name":"value","internalType":"uint256"},{"type":"bytes","name":"data","internalType":"bytes"}]}]
Contract Creation Code
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