Address Contract Partially Verified
Address
0x3c6cFBDAF0A04fc257B185BF98934a12124FE8D0
Balance
0 ETH
Nonce
1
Code Size
15450 bytes
Creator
0x5A6A52A7...0649 at tx 0xdaabde52...4b1c0f
Indexed Transactions
0
Contract Bytecode
15450 bytes
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Verified Source Code Partial Match
Compiler: v0.4.24+commit.e67f0147
EVM: byzantium
Optimization: No
KRWQToken.sol 505 lines
pragma solidity ^0.4.24;
contract Multiownable {
bool public paused = false;
uint256 public howManyOwnersDecide;
address[] public owners;
bytes32[] public allOperations;
address internal insideCallSender;
uint256 internal insideCallCount;
mapping(address => uint) public ownersIndices; // Starts from 1
mapping(bytes32 => uint) public allOperationsIndicies;
mapping(bytes32 => uint256) public votesMaskByOperation;
mapping(bytes32 => uint256) public votesCountByOperation;
event OperationCreated(bytes32 operation, uint howMany, uint ownersCount, address proposer);
event OperationUpvoted(bytes32 operation, uint votes, uint howMany, uint ownersCount, address upvoter);
event OperationPerformed(bytes32 operation, uint howMany, uint ownersCount, address performer);
event OperationDownvoted(bytes32 operation, uint votes, uint ownersCount, address downvoter);
event OperationCancelled(bytes32 operation, address lastCanceller);
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event Pause();
event Unpause();
function isOwner(address wallet) public constant returns(bool) {
return ownersIndices[wallet] > 0;
}
function ownersCount() public view returns(uint) {
return owners.length;
}
function allOperationsCount() public view returns(uint) {
return allOperations.length;
}
modifier onlyAnyOwner {
if (checkHowManyOwners(1)) {
bool update = (insideCallSender == address(0));
if (update) {
insideCallSender = msg.sender;
insideCallCount = 1;
}
_;
if (update) {
insideCallSender = address(0);
insideCallCount = 0;
}
}
}
modifier onlyManyOwners {
if (checkHowManyOwners(howManyOwnersDecide)) {
bool update = (insideCallSender == address(0));
if (update) {
insideCallSender = msg.sender;
insideCallCount = howManyOwnersDecide;
}
_;
if (update) {
insideCallSender = address(0);
insideCallCount = 0;
}
}
}
constructor() public { }
function checkHowManyOwners(uint howMany) internal returns(bool) {
if (insideCallSender == msg.sender) {
require(howMany <= insideCallCount, "checkHowManyOwners: nested owners modifier check require more owners");
return true;
}
uint ownerIndex = ownersIndices[msg.sender] - 1;
require(ownerIndex < owners.length, "checkHowManyOwners: msg.sender is not an owner");
bytes32 operation = keccak256(abi.encodePacked(msg.data));
require((votesMaskByOperation[operation] & (2 ** ownerIndex)) == 0, "checkHowManyOwners: owner already voted for the operation");
votesMaskByOperation[operation] |= (2 ** ownerIndex);
uint operationVotesCount = votesCountByOperation[operation] + 1;
votesCountByOperation[operation] = operationVotesCount;
if (operationVotesCount == 1) {
allOperationsIndicies[operation] = allOperations.length;
allOperations.push(operation);
emit OperationCreated(operation, howMany, owners.length, msg.sender);
}
emit OperationUpvoted(operation, operationVotesCount, howMany, owners.length, msg.sender);
// If enough owners confirmed the same operation
if (votesCountByOperation[operation] == howMany) {
deleteOperation(operation);
emit OperationPerformed(operation, howMany, owners.length, msg.sender);
return true;
}
return false;
}
function deleteOperation(bytes32 operation) internal {
uint index = allOperationsIndicies[operation];
if (index < allOperations.length - 1) { // Not last
allOperations[index] = allOperations[allOperations.length - 1];
allOperationsIndicies[allOperations[index]] = index;
}
allOperations.length--;
delete votesMaskByOperation[operation];
delete votesCountByOperation[operation];
delete allOperationsIndicies[operation];
}
function cancelPending(bytes32 operation) public onlyAnyOwner {
uint ownerIndex = ownersIndices[msg.sender] - 1;
require((votesMaskByOperation[operation] & (2 ** ownerIndex)) != 0, "cancelPending: operation not found for this user");
votesMaskByOperation[operation] &= ~(2 ** ownerIndex);
uint operationVotesCount = votesCountByOperation[operation] - 1;
votesCountByOperation[operation] = operationVotesCount;
emit OperationDownvoted(operation, operationVotesCount, owners.length, msg.sender);
if (operationVotesCount == 0) {
deleteOperation(operation);
emit OperationCancelled(operation, msg.sender);
}
}
function transferOwnership(address _newOwner, address _oldOwner) public onlyManyOwners {
_transferOwnership(_newOwner, _oldOwner);
}
function _transferOwnership(address _newOwner, address _oldOwner) internal {
require(_newOwner != address(0));
for(uint256 i = 0; i < owners.length; i++) {
if (_oldOwner == owners[i]) {
owners[i] = _newOwner;
ownersIndices[_newOwner] = ownersIndices[_oldOwner];
ownersIndices[_oldOwner] = 0;
break;
}
}
emit OwnershipTransferred(_oldOwner, _newOwner);
}
modifier whenNotPaused() {
require(!paused);
_;
}
modifier whenPaused() {
require(paused);
_;
}
function pause() public onlyManyOwners whenNotPaused {
paused = true;
emit Pause();
}
function unpause() public onlyManyOwners whenPaused {
paused = false;
emit Unpause();
}
}
contract GovernanceMigratable is Multiownable {
mapping(address => bool) public governanceContracts;
event GovernanceContractAdded(address addr);
event GovernanceContractRemoved(address addr);
modifier onlyGovernanceContracts() {
require(governanceContracts[msg.sender]);
_;
}
function addAddressToGovernanceContract(address addr) onlyManyOwners public returns(bool success) {
if (!governanceContracts[addr]) {
governanceContracts[addr] = true;
emit GovernanceContractAdded(addr);
success = true;
}
}
function removeAddressFromGovernanceContract(address addr) onlyManyOwners public returns(bool success) {
if (governanceContracts[addr]) {
governanceContracts[addr] = false;
emit GovernanceContractRemoved(addr);
success = true;
}
}
}
contract BlacklistMigratable is GovernanceMigratable {
mapping(address => bool) public blacklist;
event BlacklistedAddressAdded(address addr);
event BlacklistedAddressRemoved(address addr);
function addAddressToBlacklist(address addr) onlyGovernanceContracts() public returns(bool success) {
if (!blacklist[addr]) {
blacklist[addr] = true;
emit BlacklistedAddressAdded(addr);
success = true;
}
}
function removeAddressFromBlacklist(address addr) onlyGovernanceContracts() public returns(bool success) {
if (blacklist[addr]) {
blacklist[addr] = false;
emit BlacklistedAddressRemoved(addr);
success = true;
}
}
}
library SafeMath {
function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
if (_a == 0) {
return 0;
}
c = _a * _b;
assert(c / _a == _b);
return c;
}
function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
return _a / _b;
}
function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
assert(_b <= _a);
return _a - _b;
}
function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
c = _a + _b;
assert(c >= _a);
return c;
}
}
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address _who) public view returns (uint256);
function transfer(address _to, uint256 _value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address _owner, address _spender)
public view returns (uint256);
function transferFrom(address _from, address _to, uint256 _value)
public returns (bool);
function approve(address _spender, uint256 _value) public returns (bool);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) internal balances;
uint256 internal totalSupply_;
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(_value <= balances[msg.sender]);
require(_to != address(0));
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
returns (bool)
{
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(_to != address(0));
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(
address _owner,
address _spender
)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
function increaseApproval(
address _spender,
uint256 _addedValue
)
public
returns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue));
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(
address _spender,
uint256 _subtractedValue
)
public
returns (bool)
{
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue >= oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract TruePausableToken is StandardToken, BlacklistMigratable {
function transfer(
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(!blacklist[msg.sender]);
return super.transfer(_to, _value);
}
function transferFrom(
address _from,
address _to,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
require(!blacklist[_from]);
return super.transferFrom(_from, _to, _value);
}
function approve(
address _spender,
uint256 _value
)
public
whenNotPaused
returns (bool)
{
return super.approve(_spender, _value);
}
function increaseApproval(
address _spender,
uint _addedValue
)
public
whenNotPaused
returns (bool success)
{
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(
address _spender,
uint _subtractedValue
)
public
whenNotPaused
returns (bool success)
{
return super.decreaseApproval(_spender, _subtractedValue);
}
}
contract DetailedERC20 is ERC20 {
string public name;
string public symbol;
uint8 public decimals;
constructor(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
}
contract TrueBurnableToken is BasicToken {
event Burn(address indexed burner, uint256 value);
function _burn(address _who, uint256 _value) internal {
require(_value <= balances[_who]);
balances[_who] = balances[_who].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
}
contract KRWQToken is StandardToken, TrueBurnableToken, DetailedERC20, TruePausableToken {
event Mint(address indexed to, uint256 amount);
uint8 constant DECIMALS = 18;
constructor(address _firstOwner,
address _secondOwner,
address _thirdOwner,
address _fourthOwner,
address _fifthOwner) DetailedERC20("KRWQ Stablecoin by Q DAO v1.0", "KRWQ", DECIMALS) public {
owners.push(_firstOwner);
owners.push(_secondOwner);
owners.push(_thirdOwner);
owners.push(_fourthOwner);
owners.push(_fifthOwner);
owners.push(msg.sender);
ownersIndices[_firstOwner] = 1;
ownersIndices[_secondOwner] = 2;
ownersIndices[_thirdOwner] = 3;
ownersIndices[_fourthOwner] = 4;
ownersIndices[_fifthOwner] = 5;
ownersIndices[msg.sender] = 6;
howManyOwnersDecide = 4;
}
function mint(address _to, uint256 _amount) external onlyGovernanceContracts() returns (bool){
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
function approveForOtherContracts(address _sender, address _spender, uint256 _value) external onlyGovernanceContracts() {
allowed[_sender][_spender] = _value;
emit Approval(_sender, _spender, _value);
}
function burnFrom(address _to, uint256 _amount) external onlyGovernanceContracts() returns (bool) {
allowed[_to][msg.sender] = _amount;
transferFrom(_to, msg.sender, _amount);
_burn(msg.sender, _amount);
return true;
}
}
Read Contract
allOperations 0x431ab233 → bytes32
allOperationsCount 0x22f2f89a → uint256
allOperationsIndicies 0xea1a2644 → uint256
allowance 0xdd62ed3e → uint256
balanceOf 0x70a08231 → uint256
blacklist 0xf9f92be4 → bool
decimals 0x313ce567 → uint8
governanceContracts 0x50500a8a → bool
howManyOwnersDecide 0x2f4a81df → uint256
isOwner 0x2f54bf6e → bool
name 0x06fdde03 → string
owners 0x025e7c27 → address
ownersCount 0xb9488546 → uint256
ownersIndices 0xcc047a04 → uint256
paused 0x5c975abb → bool
symbol 0x95d89b41 → string
totalSupply 0x18160ddd → uint256
votesCountByOperation 0x90a53085 → uint256
votesMaskByOperation 0x568b5915 → uint256
Write Contract 16 functions
These functions modify contract state and require a wallet transaction to execute.
addAddressToBlacklist 0xf2c816ae
address addr
returns: bool
addAddressToGovernanceContract 0x81ab5b0e
address addr
returns: bool
approve 0x095ea7b3
address _spender
uint256 _value
returns: bool
approveForOtherContracts 0x16d8039c
address _sender
address _spender
uint256 _value
burnFrom 0x79cc6790
address _to
uint256 _amount
returns: bool
cancelPending 0x893372ca
bytes32 operation
decreaseApproval 0x66188463
address _spender
uint256 _subtractedValue
returns: bool
increaseApproval 0xd73dd623
address _spender
uint256 _addedValue
returns: bool
mint 0x40c10f19
address _to
uint256 _amount
returns: bool
pause 0x8456cb59
No parameters
removeAddressFromBlacklist 0x35e82f3a
address addr
returns: bool
removeAddressFromGovernanceContract 0xf666cd37
address addr
returns: bool
transfer 0xa9059cbb
address _to
uint256 _value
returns: bool
transferFrom 0x23b872dd
address _from
address _to
uint256 _value
returns: bool
transferOwnership 0x6d435421
address _newOwner
address _oldOwner
unpause 0x3f4ba83a
No parameters
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