Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
pragma solidity ^0.5.0;
contract Token {
string public name = "PandaZeng";
string public symbol = "PZ";
uint256 public totalSupply;
uint8 public decimals = 0;
event Transfer(
address indexed _from,
address indexed _to,
uint256 _value
event Approval(
address indexed _owner,
address indexed _spender,
uint256 _value
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
constructor(uint256 _initialSupply) public {
balanceOf[msg.sender] = _initialSupply;
totalSupply = _initialSupply;
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value);
balanceOf[msg.sender] -= _value;
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value);
return true;
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= balanceOf[_from]);
require(_value <= allowance[_from][msg.sender]);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
allowance[_from][msg.sender] -= _value;
emit Transfer(_from, _to, _value);
return true;
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment