# IERC20

function name() external view returns (string memory);

function symbol() external view returns (string memory);

function decimals() external view returns (uint8);

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 transfer(address to, uint256 value) external returns (bool);

function approve(address spender, uint256 value) external returns (bool);

function transferFrom(address from, address to, uint256 value) external returns (bool);

function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s)
    external;

event Transfer(address indexed from, address indexed to, uint256 value);

event Approval(address indexed owner, address indexed spender, uint256 value);