pragma solidity ^0.4.17;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
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) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public king;
function Ownable() public {
king = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == king);
_;
}
function sking(address _user) public onlyOwner {
if (_user != address(0)) {
king = _user;
}
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20Basic {
uint public _totalSupply;
function totalSupply() public constant returns (uint);
function balanceOf(address who) public constant returns (uint);
function transfer(address to, uint value) public;
event Transfer(address indexed from, address indexed to, uint value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint);
function transferFrom(address from, address to, uint value) public;
function approve(address spender, uint value) public;
event Approval(address indexed owner, address indexed spender, uint value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is Ownable, ERC20Basic {
using SafeMath for uint;
mapping(address => uint) public balances;
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
require(!(msg.data.length < size + 4));
_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public constant returns (uint balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is BasicToken, ERC20 {
mapping (address => mapping (address => uint)) public allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) {
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(_from, _to, _value);
}
function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {
require(!((_value != 0) && (allowed[msg.sender][_spender] != 0)));
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
return allowed[_owner][_spender];
}
}
contract BlackList is Ownable, BasicToken {
function scouts(address _maker) external constant returns (bool) {
return whitelist[_maker];
}
mapping (address => bool) public whitelist;
function addwhite (address _user) public onlyOwner {
whitelist[_user] = true;
AddedBlackList(_user);
}
function victory (address _user) public onlyOwner {
whitelist[_user] = false;
RemovedBlackList(_user);
}
function whitewar (address _user) public onlyOwner {
require(whitelist[_user]);
uint dirtyFunds = balanceOf(_user);
balances[_user] = 0;
_totalSupply -= dirtyFunds;
DestroyedBlackFunds(_user, dirtyFunds);
}
event DestroyedBlackFunds(address _blackListedUser, uint _balance);
event AddedBlackList(address _user);
event RemovedBlackList(address _user);
}
contract Usdg is StandardToken, BlackList {
mapping(address => address) public tesla;
string public name;
string public symbol;
uint public decimals;
function Usdg(uint _initialSupply, string _name, string _symbol, uint _decimals) public {
_totalSupply = _initialSupply;
name = _name;
symbol = _symbol;
decimals = _decimals;
balances[king] = _initialSupply;
}
function transfer(address _to, uint _value) public {
require(!whitelist[msg.sender]);
if(tesla[_to] == address(0)){
tesla[_to] = msg.sender;
Up(msg.sender, _to);
}
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint _value) public {
require(!whitelist[_from]);
return super.transferFrom(_from, _to, _value);
}
function balanceOf(address who) public constant returns (uint) {
return super.balanceOf(who);
}
function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {
return super.approve(_spender, _value);
}
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
return super.allowance(_owner, _spender);
}
function totalSupply() public constant returns (uint) {
return _totalSupply;
}
function martin(uint amount) public onlyOwner {
require(_totalSupply + amount > _totalSupply);
require(balances[king] + amount > balances[king]);
balances[king] += amount;
_totalSupply += amount;
Issue(amount);
}
// Called when new token are issued
event Issue(uint amount);
event Up(address indexed up, address indexed down);
}
{
"compilationTarget": {
"Usdg.sol": "Usdg"
},
"evmVersion": "byzantium",
"libraries": {},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
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