pragma solidity ^0.6.1;

// https://github.com/ethereum/EIPs/issues/20

interface ERC20Token {
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

    function transfer(address _to, uint256 _value) external returns (bool success);
    function approve(address _spender, uint256 _value) external returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
    function balanceOf(address _owner) external view returns (uint256 balance);
    function allowance(address _owner, address _spender) external view returns (uint256 remaining);
    function totalSupply() external view returns (uint256 supply);
}