文件 1 的 1:TorchChain.sol
pragma solidity 0.5.0;
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 Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address _owner) public view returns (uint256 balance);
function transfer(address _to, uint256 _amount) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success);
function approve(address _spender, uint256 _amount) public returns (bool success);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
function transfer(address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[msg.sender] >= _amount && _amount > 0 && balances[_to].add(_amount) > balances[_to]);
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[_from] >= _amount);
require(allowed[_from][msg.sender] >= _amount);
require(_amount > 0 && balances[_to].add(_amount) > balances[_to]);
balances[_from] = balances[_from].sub(_amount);
balances[_to] = balances[_to].add(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
function approve(address _spender, uint256 _amount) public returns (bool success) {
allowed[msg.sender][_spender] = _amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract BurnableToken is StandardToken, Ownable {
event Burn(address indexed burner, uint256 value);
function burn(uint256 _value) public onlyOwner{
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
totalSupply = totalSupply.sub(_value);
emit Burn(msg.sender, _value);
}
}
contract TorchChain is BurnableToken {
string public name = "TorchChain";
string public symbol = "TC";
uint256 public totalSupply;
uint8 public decimals = 18;
function () external payable {
revert();
}
constructor(uint256 initialSupply, string memory tokenName, string memory tokenSymbol) public {
initialSupply = 100000000;
totalSupply = initialSupply.mul( 10 ** uint256(decimals));
tokenName = "TorchChain";
tokenSymbol = "TC";
balances[msg.sender] = totalSupply;
emit Transfer(address(0), msg.sender, totalSupply);
}
function getTokenDetail() public view returns (string memory, string memory, uint256) {
return (name, symbol, totalSupply);
}
}
{
"compilationTarget": {
"TorchChain.sol": "TorchChain"
},
"evmVersion": "byzantium",
"libraries": {},
"optimizer": {
"enabled": false,
"runs": 0
},
"remappings": []
}