// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity >=0.5.12;

// A base ERC-20 abstract class
// https://eips.ethereum.org/EIPS/eip-20
interface GemAbstract {
    function totalSupply() external view returns (uint256);
    function balanceOf(address) external view returns (uint256);
    function allowance(address, address) external view returns (uint256);
    function approve(address, uint256) external returns (bool);
    function transfer(address, uint256) external returns (bool);
    function transferFrom(address, address, uint256) external returns (bool);
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}