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WIZ Token Contract
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pragma solidity ^0.4.17; | |
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 Base { | |
function max(uint a, uint b) returns (uint) { return a >= b ? a : b; } | |
function min(uint a, uint b) returns (uint) { return a <= b ? a : b; } | |
modifier only(address allowed) { | |
require(msg.sender == allowed); | |
_; | |
} | |
function isContract(address _addr) constant internal returns (bool) { | |
if (_addr == 0) return false; | |
uint size; | |
assembly { | |
size := extcodesize(_addr) | |
} | |
return (size > 0); | |
} | |
// ************************************************* | |
// * reentrancy handling * | |
// ************************************************* | |
uint constant internal L00 = 2 ** 0; | |
uint constant internal L01 = 2 ** 1; | |
uint constant internal L02 = 2 ** 2; | |
uint constant internal L03 = 2 ** 3; | |
uint constant internal L04 = 2 ** 4; | |
uint constant internal L05 = 2 ** 5; | |
uint private bitlocks = 0; | |
modifier noReentrancy(uint m) { | |
var _locks = bitlocks; | |
require(_locks & m <= 0); | |
bitlocks |= m; | |
_; | |
bitlocks = _locks; | |
} | |
modifier noAnyReentrancy { | |
var _locks = bitlocks; | |
require(_locks <= 0); | |
bitlocks = uint(-1); | |
_; | |
bitlocks = _locks; | |
} | |
modifier reentrant { _; } | |
} | |
contract Owned is Base { | |
address public owner; | |
address public newOwner; | |
function Owned() { | |
owner = msg.sender; | |
} | |
function transferOwnership(address _newOwner) only(owner) { | |
newOwner = _newOwner; | |
} | |
function acceptOwnership() only(newOwner) { | |
OwnershipTransferred(owner, newOwner); | |
owner = newOwner; | |
} | |
event OwnershipTransferred(address indexed _from, address indexed _to); | |
} | |
contract ERC20 is Owned { | |
event Transfer(address indexed _from, address indexed _to, uint256 _value); | |
event Approval(address indexed _owner, address indexed _spender, uint256 _value); | |
function transfer(address _to, uint256 _value) isStartedOnly returns (bool success) { | |
if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) { | |
balances[msg.sender] -= _value; | |
balances[_to] += _value; | |
Transfer(msg.sender, _to, _value); | |
return true; | |
} else { return false; } | |
} | |
function transferFrom(address _from, address _to, uint256 _value) isStartedOnly returns (bool success) { | |
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) { | |
balances[_to] += _value; | |
balances[_from] -= _value; | |
allowed[_from][msg.sender] -= _value; | |
Transfer(_from, _to, _value); | |
return true; | |
} else { return false; } | |
} | |
function balanceOf(address _owner) constant returns (uint256 balance) { | |
return balances[_owner]; | |
} | |
function approve(address _spender, uint256 _value) isStartedOnly returns (bool success) { | |
allowed[msg.sender][_spender] = _value; | |
Approval(msg.sender, _spender, _value); | |
return true; | |
} | |
function allowance(address _owner, address _spender) constant returns (uint256 remaining) { | |
return allowed[_owner][_spender]; | |
} | |
mapping (address => uint256) balances; | |
mapping (address => mapping (address => uint256)) allowed; | |
uint256 public totalSupply; | |
bool public isStarted = false; | |
modifier onlyHolder(address holder) { | |
require(balanceOf(holder) != 0); | |
_; | |
} | |
modifier isStartedOnly() { | |
require(isStarted); | |
_; | |
} | |
} | |
contract Token is ERC20 { | |
using SafeMath for uint256; | |
string public name = "CrowdWizToken"; | |
string public symbol = "WIZ"; | |
uint public decimals = 18; | |
address public crowdsaleMinter; | |
modifier onlyCrowdsaleMinter(){ | |
require(msg.sender == crowdsaleMinter); | |
_; | |
} | |
modifier isNotStartedOnly() { | |
require(!isStarted); | |
_; | |
} | |
function Token(address _crowdsaleMinter){ | |
crowdsaleMinter = _crowdsaleMinter; | |
} | |
// ------------------------------------------------------------------------ | |
// Don't accept ethers | |
// ------------------------------------------------------------------------ | |
function () { | |
revert(); | |
} | |
function getTotalSupply() | |
public | |
constant | |
returns(uint) | |
{ | |
return totalSupply; | |
} | |
function start() | |
public | |
onlyCrowdsaleMinter | |
isNotStartedOnly | |
{ | |
isStarted = true; | |
} | |
function emergencyStop() | |
public | |
only(owner) | |
{ | |
isStarted = false; | |
} | |
//================= Crowdsale Only ================= | |
function mint(address _to, uint _amount) public | |
onlyCrowdsaleMinter | |
isNotStartedOnly | |
returns(bool) | |
{ | |
totalSupply = totalSupply.add(_amount); | |
balances[_to] = balances[_to].add(_amount); | |
return true; | |
} | |
} | |
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