pragma solidity ^0.4.20;
contract ERC20ext
{
function totalSupply() public constant returns (uint supply);
function balanceOf( address who ) public constant returns (uint value);
function allowance( address owner, address spender ) public constant returns (uint _allowance);
function transfer( address to, uint value) public returns (bool ok);
function transferFrom( address from, address to, uint value) public returns (bool ok);
function approve( address spender, uint value ) public returns (bool ok);
event Transfer( address indexed from, address indexed to, uint value);
event Approval( address indexed owner, address indexed spender, uint value);
// extand
function postMessage(address dst, uint wad,string data) public returns (bool ok);
function appointNewCFO(address newCFO) public returns (bool ok);
function melt(address dst, uint256 wad) public returns (bool ok);
function mint(address dst, uint256 wad) public returns (bool ok);
function freeze(address dst, bool flag) public returns (bool ok);
event MeltEvent(address indexed dst, uint256 wad);
event MintEvent(address indexed dst, uint256 wad);
event FreezeEvent(address indexed dst, bool flag);
}
contract 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 MRC is ERC20ext,SafeMath
{
string public name;
string public symbol;
uint8 public decimals = 18;
address _cfo;
uint256 _supply;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) _allowance;
mapping (address => bool) public _frozen;
function MRC(uint256 initialSupply,string tokenName,string tokenSymbol) public
{
_cfo = msg.sender;
_supply = initialSupply * 10 ** uint256(decimals);
_balances[_cfo] = _supply;
name = tokenName;
symbol = tokenSymbol;
}
modifier onlyCFO()
{
require(msg.sender == _cfo);
_;
}
function totalSupply() public constant returns (uint256)
{
return _supply;
}
function balanceOf(address src) public constant returns (uint256)
{
return _balances[src];
}
function allowance(address src, address dst) public constant returns (uint256)
{
return _allowance[src][dst];
}
function transfer(address dst, uint wad) public returns (bool)
{
require(!_frozen[msg.sender]);
require(!_frozen[dst]);
require(_balances[msg.sender] >= wad);
_balances[msg.sender] = sub(_balances[msg.sender],wad);
_balances[dst] = add(_balances[dst], wad);
Transfer(msg.sender, dst, wad);
return true;
}
function transferFrom(address src, address dst, uint wad) public returns (bool)
{
require(!_frozen[msg.sender]);
require(!_frozen[dst]);
require(_balances[src] >= wad);
require(_allowance[src][msg.sender] >= wad);
_allowance[src][msg.sender] = sub(_allowance[src][msg.sender],wad);
_balances[src] = sub(_balances[src],wad);
_balances[dst] = add(_balances[dst],wad);
Transfer(src, dst, wad);
return true;
}
function approve(address dst, uint256 wad) public returns (bool)
{
_allowance[msg.sender][dst] = wad;
Approval(msg.sender, dst, wad);
return true;
}
function postMessage(address dst, uint wad,string data) public returns (bool)
{
return transfer(dst,wad);
}
function appointNewCFO(address newCFO) onlyCFO public returns (bool)
{
if (newCFO != _cfo)
{
_cfo = newCFO;
return true;
}
else
{
return false;
}
}
function freeze(address dst, bool flag) onlyCFO public returns (bool)
{
_frozen[dst] = flag;
FreezeEvent(dst, flag);
return true;
}
function mint(address dst, uint256 wad) onlyCFO public returns (bool)
{
_balances[dst] = add(_balances[dst],wad);
_supply = add(_supply,wad);
MintEvent(dst, wad);
return true;
}
function melt(address dst, uint256 wad) onlyCFO public returns (bool)
{
require(_balances[dst] >= wad);
_balances[dst] = sub(_balances[dst],wad);
_supply = sub(_supply,wad);
MeltEvent(dst, wad);
return true;
}
}
{
"compilationTarget": {
"MRC.sol": "MRC"
},
"evmVersion": "byzantium",
"libraries": {},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
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