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pragma solidity ^0.4.18;
contract owned {
address public owner;
function owned() {
owner = msg.sender;
}
function changeOwner(address newOwner) onlyOwner {
owner = newOwner;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
contract tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData); }
contract GoalToken is owned {
string public name = "GOAL Bonanza";
string public symbol = "GOAL";
uint8 public decimals = 18;
uint256 public totalSupply = 0;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Burn(address indexed from, uint256 value);
function _transfer(address _from, address _to, uint _value) internal {
require (_to != 0x0);
require (balanceOf[_from] > _value);
require (balanceOf[_to] + _value > balanceOf[_to]);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
}
function transfer(address _to, uint256 _value) {
_transfer(msg.sender, _to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
require (_value <= allowance[_from][msg.sender]);
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value)
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
function burn(uint256 _value) returns (bool success) {
require (balanceOf[msg.sender] > _value);
balanceOf[msg.sender] -= _value;
totalSupply -= _value;
Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) returns (bool success) {
require(balanceOf[_from] >= _value);
require(_value <= allowance[_from][msg.sender]);
balanceOf[_from] -= _value;
allowance[_from][msg.sender] -= _value;
totalSupply -= _value;
Burn(_from, _value);
return true;
}
function mintToken(address target, uint256 mintedAmount) onlyOwner {
balanceOf[target] += mintedAmount;
totalSupply += mintedAmount;
Transfer(this, target, mintedAmount);
}
} |