/* SPDX-License-Identifier: LGPL-3.0-or-later */
pragma solidity ^0.7.0;

import "@paulrberg/contracts/token/erc20/Erc20Interface.sol";
import "./BalanceSheetInterface.sol";
import "./FintrollerInterface.sol";
import "./RedemptionPoolInterface.sol";

/**
 * @title FyTokenStorage
 * @author Hifi
 */
abstract contract FyTokenStorage {
    /**
     * STORAGE PROPERTIES
     */

    /**
     * @notice The global debt registry.
     */
    BalanceSheetInterface public balanceSheet;

    /**
     * @notice The Erc20 asset that backs the borrows of this fyToken.
     */
    Erc20Interface public collateral;

    /**
     * @notice The ratio between mantissa precision (1e18) and the collateral precision.
     */
    uint256 public collateralPrecisionScalar;

    /**
     * @notice Unix timestamp in seconds for when this token expires.
     */
    uint256 public expirationTime;

    /**
     * @notice The unique Fintroller associated with this contract.
     */
    FintrollerInterface public fintroller;

    /**
     * @notice The unique Redemption Pool associated with this contract.
     */
    RedemptionPoolInterface public redemptionPool;

    /**
     * @notice The Erc20 underlying, or target, asset for this fyToken.
     */
    Erc20Interface public underlying;

    /**
     * @notice The ratio between mantissa precision (1e18) and the underlying precision.
     */
    uint256 public underlyingPrecisionScalar;

    /**
     * @notice Indicator that this is a FyToken contract, for inspection.
     */
    bool public constant isFyToken = true;
}