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HacToken
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pragma solidity ^0.4.11; | |
contract ERC20Interface { | |
function totalSupply() constant returns (uint256 total); // Get the total token supply | |
function balanceOf(address _owner) constant returns (uint256 balance); // Get the account balance of another account with address _owner | |
function transfer(address _to, uint256 _value) returns (bool success); // Send _value amount of tokens to address _to | |
function transferFrom(address _from, address _to, uint256 _value) returns (bool success); // Send _value amount of tokens from address _from to address _to | |
// Allow _spender to withdraw from your account, multiple times, up to the _value amount. | |
// If this function is called again it overwrites the current allowance with _value. | |
// this function is required for some DEX functionality | |
// function approve(address _spender, uint256 _value) returns (bool success); | |
// function allowance(address _owner, address _spender) constant returns (uint256 remaining); // Returns the amount which _spender is still allowed to withdraw from _owner | |
event Transfer(address indexed _from, address indexed _to, uint256 _value); // Triggered when tokens are transferred. | |
//event Approval(address indexed _owner, address indexed _spender, uint256 _value); // Triggered whenever approve(address _spender, uint256 _value) is called. | |
} | |
/** | |
* @title SafeMath | |
* @dev Math operations with safety checks that throw on error | |
*/ | |
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) { | |
// 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 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 owned { | |
address public owner; | |
function owned() { | |
owner = msg.sender; | |
} | |
modifier onlyOwner { | |
if (msg.sender != owner) revert(); | |
_; | |
} | |
/* function transferOwnership(address newOwner) onlyOwner { | |
owner = newOwner; | |
} */ | |
} | |
contract tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData); } | |
contract HacToken is ERC20Interface, owned{ | |
string public standard = 'Token 0.1'; | |
string public name; | |
string public symbol; | |
uint8 public decimals; | |
uint256 public freeTokens; | |
uint256 public totalSupply; | |
mapping (address => uint256) public balanceOf; | |
event TransferFrom(address indexed _from, address indexed _to, uint256 _value); // Triggered when tokens are transferred by owner. | |
function HacToken() { | |
totalSupply = freeTokens = 10000000000000; | |
name = "HAC Token"; | |
decimals = 4; | |
symbol = "HAC"; | |
} | |
function totalSupply() constant returns (uint256 total) { | |
return total = totalSupply; | |
} | |
function balanceOf(address _owner) constant returns (uint256 balance) { | |
return balanceOf[_owner]; | |
} | |
/* function approve(address _spender, uint256 _amount) returns (bool success) { | |
return false; | |
} | |
function allowance(address _owner, address _spender) constant returns (uint256 remaining) { | |
return 0; | |
} */ | |
function () { | |
revert(); | |
} | |
function setTokens(address target, uint256 amount) onlyOwner { | |
if(freeTokens < amount) revert(); | |
balanceOf[target] = SafeMath.add(balanceOf[target], amount); | |
freeTokens = SafeMath.sub(freeTokens, amount); | |
Transfer(this, target, amount); | |
} | |
function transfer(address _to, uint256 _value) returns (bool success){ | |
balanceOf[msg.sender] = SafeMath.sub(balanceOf[msg.sender], _value); | |
balanceOf[_to] = SafeMath.add(balanceOf[_to], _value); | |
Transfer(msg.sender, _to, _value); | |
return true; | |
} | |
function transferFrom(address _from, address _to, uint256 _value) onlyOwner returns (bool success) { | |
balanceOf[_from] = SafeMath.sub(balanceOf[_from], _value); | |
balanceOf[_to] = SafeMath.add(balanceOf[_to], _value); | |
TransferFrom(_from, _to, _value); | |
return true; | |
} | |
} |
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