IScaledBalanceToken.sol

// SPDX-License-Identifier: agpl-3.0
pragma solidity ^0.8.0;

interface IScaledBalanceToken {
    /**
     * @dev Returns the scaled balance of the user. The scaled balance is the sum of all the
     * updated stored balance divided by the reserve's liquidity index at the moment of the update
     * @param user The user whose balance is calculated
     * @return The scaled balance of the user
     **/
    function scaledBalanceOf(address user) external view returns (uint256);

    /**
     * @dev Returns the scaled balance of the user and the scaled total supply.
     * @param user The address of the user
     * @return The scaled balance of the user
     * @return The scaled balance and the scaled total supply
     **/
    function getScaledUserBalanceAndSupply(address user) external view returns (uint256, uint256);

    /**
     * @dev Returns the scaled total supply of the variable debt token. Represents sum(debt/index)
     * @return The scaled total supply
     **/
    function scaledTotalSupply() external view returns (uint256);
}