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Ethereum Gold
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pragma solidity ^ 0.4 .9; | |
library SafeMath { | |
function mul(uint256 a, uint256 b) internal constant returns(uint256) { | |
uint256 c = a * b; | |
assert(a == 0 || c / a == b); | |
return c; | |
} | |
function div(uint256 a, uint256 b) internal constant returns(uint256) { | |
uint256 c = a / b; | |
return c; | |
} | |
function sub(uint256 a, uint256 b) internal constant returns(uint256) { | |
assert(b <= a); | |
return a - b; | |
} | |
function add(uint256 a, uint256 b) internal constant returns(uint256) { | |
uint256 c = a + b; | |
assert(c >= a); | |
return c; | |
} | |
} | |
contract EthereumGold { | |
using SafeMath | |
for uint256; | |
mapping(address => mapping(address => uint256)) allowed; | |
mapping(address => uint256) balances; | |
uint256 public totalSupply; | |
uint256 public decimals; | |
address public owner; | |
bytes32 public symbol; | |
event Transfer(address indexed from, address indexed to, uint256 value); | |
event Approval(address indexed _owner, address indexed spender, uint256 value); | |
function EthereumGold() { | |
totalSupply = 24000000; | |
symbol = 'ETG'; | |
owner = 0xe913aef983e84ed90f340ff533ce39668f45a0f6; | |
balances[owner] = totalSupply; | |
decimals = 0; | |
} | |
function balanceOf(address _owner) constant returns(uint256 balance) { | |
return balances[_owner]; | |
} | |
function allowance(address _owner, address _spender) constant returns(uint256 remaining) { | |
return allowed[_owner][_spender]; | |
} | |
function transfer(address _to, uint256 _value) returns(bool) { | |
balances[msg.sender] = balances[msg.sender].sub(_value); | |
balances[_to] = balances[_to].add(_value); | |
Transfer(msg.sender, _to, _value); | |
return true; | |
} | |
function transferFrom(address _from, address _to, uint256 _value) returns(bool) { | |
var _allowance = allowed[_from][msg.sender]; | |
balances[_to] = balances[_to].add(_value); | |
balances[_from] = balances[_from].sub(_value); | |
allowed[_from][msg.sender] = _allowance.sub(_value); | |
Transfer(_from, _to, _value); | |
return true; | |
} | |
function approve(address _spender, uint256 _value) returns(bool) { | |
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); | |
allowed[msg.sender][_spender] = _value; | |
Approval(msg.sender, _spender, _value); | |
return true; | |
} | |
function() { | |
revert(); | |
} | |
} |
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