keycard-redeem/contracts/IERC20.sol

16 lines
766 B
Solidity

pragma solidity ^0.6.1;
// https://github.com/ethereum/EIPs/issues/20
interface IERC20 {
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);
}