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/**
 *Submitted for verification at Etherscan.io on 2025-01-08
*/

pragma solidity ^0.6.11;

contract SimpleMultiSig {

// EIP712 Precomputed hashes:
// keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract,bytes32 salt)")
bytes32 constant EIP712DOMAINTYPE_HASH = 0xd87cd6ef79d4e2b95e15ce8abf732db51ec771f1ca2edccf22a46c729ac56472;

// keccak256("Simple MultiSig")
bytes32 constant NAME_HASH = 0xb7a0bfa1b79f2443f4d73ebb9259cddbcd510b18be6fc4da7d1aa7b1786e73e6;

// keccak256("1")
bytes32 constant VERSION_HASH = 0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6;

// keccak256("MultiSigTransaction(address destination,uint256 value,bytes data,uint256 nonce,address executor,uint256 gasLimit)")
bytes32 constant TXTYPE_HASH = 0x3ee892349ae4bbe61dce18f95115b5dc02daf49204cc602458cd4c1f540d56d7;

bytes32 constant SALT = 0x251543af6a222378665a76fe38dbceae4871a070b7fdaf5c6c30cf758dc33cc0;

  uint public nonce;                 // mutable state
  uint public threshold;             // mutable state
  mapping (address => bool) isOwner; // mutable state
  address[] public ownersArr;        // mutable state

  bytes32 immutable DOMAIN_SEPARATOR;          // hash for EIP712, computed from contract address

  function owners() external view returns (address[] memory) {
    return ownersArr;
  }

  // Note that owners_ must be strictly increasing, in order to prevent duplicates
  function setOwners_(uint threshold_, address[] memory owners_) private {
    require(owners_.length <= 20 && threshold_ <= owners_.length && threshold_ > 0);

    // remove old owners from map
    for (uint i = 0; i < ownersArr.length; i++) {
      isOwner[ownersArr[i]] = false;
    }

    // add new owners to map
    address lastAdd = address(0);
    for (uint i = 0; i < owners_.length; i++) {
      require(owners_[i] > lastAdd);
      isOwner[owners_[i]] = true;
      lastAdd = owners_[i];
    }

    // set owners array and threshold
    ownersArr = owners_;
    threshold = threshold_;
  }

  constructor(uint threshold_, address[] memory owners_, uint chainId) public {
    setOwners_(threshold_, owners_);

    DOMAIN_SEPARATOR = keccak256(abi.encode(EIP712DOMAINTYPE_HASH,
                                            NAME_HASH,
                                            VERSION_HASH,
                                            chainId,
                                            this,
                                            SALT));
  }

  // Requires a quorum of owners to call from this contract using execute
  function setOwners(uint threshold_, address[] memory owners_) external {
    require(msg.sender == address(this));
    setOwners_(threshold_, owners_);
  }

  // Note that address recovered from signatures must be strictly increasing, in order to prevent duplicates
  function execute(uint8[] memory sigV, bytes32[] memory sigR, bytes32[] memory sigS, address destination, uint value, bytes memory data, address executor, uint gasLimit) external {
    require(sigR.length == threshold);
    require(sigR.length == sigS.length && sigR.length == sigV.length);
    require(executor == msg.sender || executor == address(0));

    // EIP712 scheme: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-712.md
    bytes32 txInputHash = keccak256(abi.encode(TXTYPE_HASH, destination, value, keccak256(data), nonce, executor, gasLimit));
    bytes32 totalHash = keccak256(abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR, txInputHash));

    address lastAdd = address(0); // cannot have address(0) as an owner
    for (uint i = 0; i < threshold; i++) {
      address recovered = ecrecover(totalHash, sigV[i], sigR[i], sigS[i]);
      require(recovered > lastAdd && isOwner[recovered]);
      lastAdd = recovered;
    }

    // If we make it here all signatures are accounted for.
    nonce = nonce + 1;
    bool success = false;
    (success,) = destination.call{value: value, gas: gasLimit}(data);
    require(success);
  }

  receive() external payable {}
}

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[{"inputs":[{"internalType":"uint256","name":"threshold_","type":"uint256"},{"internalType":"address[]","name":"owners_","type":"address[]"},{"internalType":"uint256","name":"chainId","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"uint8[]","name":"sigV","type":"uint8[]"},{"internalType":"bytes32[]","name":"sigR","type":"bytes32[]"},{"internalType":"bytes32[]","name":"sigS","type":"bytes32[]"},{"internalType":"address","name":"destination","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"address","name":"executor","type":"address"},{"internalType":"uint256","name":"gasLimit","type":"uint256"}],"name":"execute","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"nonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owners","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"ownersArr","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"threshold_","type":"uint256"},{"internalType":"address[]","name":"owners_","type":"address[]"}],"name":"setOwners","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"threshold","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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

-----Decoded View---------------
Arg [0] : threshold_ (uint256): 2
Arg [1] : owners_ (address[]): 0x0ed1Bb8A2a9B205EA7a79Ec3Add4483811ff4A7F,0x1B900A41472D1DFc7B88fB85fdAC36E3A46a5daf,0x232d6402DFc020cdD4bC499436bD536F84167D6F,0x50062b2E7705eD7bBD9261F8Db98A64ff7A62710,0x57FB8a5E19C7a982E0Fd98c7A60ca78339b04D23,0x5Dcdf9BaECA6d27fcdF98752bb608FAe8aef6db0,0x6ed240fa9C800c3B6AeCFec0B707f1dCEc8B7546,0xa6aBe36af7777822Ca3DC76E9341dd512EF58C20,0xb05869Fa20420AAfd9C4c97aB9150fB413c7E311,0xCb25C0C1EecdC742109B560321ff2482E5E8ccE7,0xCbCAbF13103de4ece355B6f87356503a2C813Fb9,0xe1FD5ECa4aDA3dc92CF11a1C4EE7579aA4dF3E11,0xF99B6aE0c66ADF0B6B5e99f84494C4260e85967B,0xfe3CD70e7ba3e8f23502F01773E4a58e7e6a7090
Arg [2] : chainId (uint256): 1

-----Encoded View---------------
18 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [3] : 000000000000000000000000000000000000000000000000000000000000000e
Arg [4] : 0000000000000000000000000ed1bb8a2a9b205ea7a79ec3add4483811ff4a7f
Arg [5] : 0000000000000000000000001b900a41472d1dfc7b88fb85fdac36e3a46a5daf
Arg [6] : 000000000000000000000000232d6402dfc020cdd4bc499436bd536f84167d6f
Arg [7] : 00000000000000000000000050062b2e7705ed7bbd9261f8db98a64ff7a62710
Arg [8] : 00000000000000000000000057fb8a5e19c7a982e0fd98c7a60ca78339b04d23
Arg [9] : 0000000000000000000000005dcdf9baeca6d27fcdf98752bb608fae8aef6db0
Arg [10] : 0000000000000000000000006ed240fa9c800c3b6aecfec0b707f1dcec8b7546
Arg [11] : 000000000000000000000000a6abe36af7777822ca3dc76e9341dd512ef58c20
Arg [12] : 000000000000000000000000b05869fa20420aafd9c4c97ab9150fb413c7e311
Arg [13] : 000000000000000000000000cb25c0c1eecdc742109b560321ff2482e5e8cce7
Arg [14] : 000000000000000000000000cbcabf13103de4ece355b6f87356503a2c813fb9
Arg [15] : 000000000000000000000000e1fd5eca4ada3dc92cf11a1c4ee7579aa4df3e11
Arg [16] : 000000000000000000000000f99b6ae0c66adf0b6b5e99f84494c4260e85967b
Arg [17] : 000000000000000000000000fe3cd70e7ba3e8f23502f01773e4a58e7e6a7090