說明：生成tocken的代碼
地址：0xcC042A4c8A047b6381Ce9a341F38A33B36FD372m
參數(shù)：100,"testTocken","xxx"
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract TokenERC20 {
? ? string public name;
? ? string public symbol;
? ? uint8 public decimals = 18;
? ? 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 Burn(address indexed from, uint256 value);
? ? function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol)?
? ? public? ?{
? ? ? ? totalSupply = initialSupply * 10 ** uint256(decimals);
? ? ? ? balanceOf[msg.sender] = totalSupply;
? ? ? ? name = tokenName;
? ? ? ? symbol = tokenSymbol;
? ? }
? ? function _transfer(address _from, address _to, uint _value) internal {
? ? ? ? require(_to != 0x0);
? ? ? ? require(balanceOf[_from] >= _value);
? ? ? ? require(balanceOf[_to] + _value > balanceOf[_to]);
? ? ? ? uint previousBalances = balanceOf[_from] + balanceOf[_to];
? ? ? ? balanceOf[_from] -= _value;
? ? ? ? balanceOf[_to] += _value;
? ? ? ? Transfer(_from, _to, _value);
? ? ? ? assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
? ? }
? ? function transfer(address _to, uint256 _value) public {
? ? ? ? _transfer(msg.sender, _to, _value);
? ? }
? ? function transferFrom(address _from, address _to, uint256 _value) public returns (
? ? bool success) {
? ? ? ? require(_value <= allowance[_from][msg.sender]);? ? // Check allowance
? ? ? ? allowance[_from][msg.sender] -= _value;
? ? ? ? _transfer(_from, _to, _value);
? ? ? ? return true;
? ? }
? ? function approve(address _spender, uint256 _value) public
? ? ? ? returns (bool success) {
? ? ? ? allowance[msg.sender][_spender] = _value;
? ? ? ? return true;
? ? }
? ? function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
? ? ? ? tokenRecipient spender = tokenRecipient(_spender);
? ? ? ? if (approve(_spender, _value)) {
? ? ? ? ? ? spender.receiveApproval(msg.sender, _value, this, _extraData);
? ? ? ? ? ? return true;
? ? ? ? }
? ? }
? ? function burn(uint256 _value) public 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) public 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;
? ? }
}
