我在通知里边更新了。合约代码放到gist里边，国内网络有时访问不了。我贴下边吧。
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval (address _from, uint256 _value, address _token, bytes _extraData) external; }
contract FangTangCoin {
string public name;
string public symbol;
uint8 public decimals = 18;
uint256 public totalSupply;
address private creator;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
function FangTangCoin(
uint256 initialSupply,
string tokenName,
string tokenSymbol
) public {
totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
name = tokenName; // Set the name for display purposes
symbol = tokenSymbol; // Set the symbol for display purposes
creator = msg.sender;
}
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;
emit 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 buyToken() public payable returns (bool success){
uint256 weiAmount = msg.value;
uint256 tokens;
uint rate = 1000;
tokens = weiAmount * ( 10 ** uint256(decimals)/ 1000000000000000000 ) * rate ;
require(tokens > 0);
_transfer(creator , msg.sender, tokens);
return true;
}
function getETH() public
{
require(address(this).balance > 0 && msg.sender == creator);
creator.transfer(address(this).balance);
}
}
