IERC20.sol

/**
 * Copyright 2017-2021, bZeroX, LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0.
 */

pragma solidity >=0.5.0 <0.6.0;

contract IERC20 {
    string public name;
    uint8 public decimals;
    string public symbol;

    function totalSupply() external view returns (uint256);

    function balanceOf(address _who) external view returns (uint256);

    function allowance(address _owner, address _spender) external view returns (uint256);

    function approve(address _spender, uint256 _value) external returns (bool);

    function transfer(address _to, uint256 _value) external returns (bool);

    function transferFrom(address _from, address _to, uint256 _value) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}