File size: 3,754 Bytes
2707524 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | pragma solidity ^0.4.18;
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
function Ownable() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a / b;
return c;
}
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) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract ERC20Token {
using SafeMath for uint256;
string public name;
string public symbol;
uint256 public decimals;
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function ERC20Token (
string _name,
string _symbol,
uint256 _decimals,
uint256 _totalSupply) public
{
name = _name;
symbol = _symbol;
decimals = _decimals;
totalSupply = _totalSupply * 10 ** decimals;
balanceOf[msg.sender] = totalSupply;
}
function _transfer(address _from, address _to, uint256 _value) internal {
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to].add(_value) > balanceOf[_to]);
uint256 previousBalances = balanceOf[_from].add(balanceOf[_to]);
balanceOf[_from] = balanceOf[_from].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
Transfer(_from, _to, _value);
assert(balanceOf[_from].add(balanceOf[_to]) == previousBalances);
}
function transfer(address _to, uint256 _value) public returns (bool success) {
_transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]);
allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value);
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
}
contract Blockcash is Ownable, ERC20Token {
event Burn(address indexed from, uint256 value);
function Blockcash (
string name,
string symbol,
uint256 decimals,
uint256 totalSupply
) ERC20Token (name, symbol, decimals, totalSupply) public {}
function() payable public {
revert();
}
function burn(uint256 _value) onlyOwner public returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value);
totalSupply = totalSupply.sub(_value);
Burn(msg.sender, _value);
return true;
}
} |