fluid-contracts-public/test/foundry/steth/iStETH.sol

//SPDX-License-Identifier: MIT
pragma solidity 0.8.21;

import { IERC20 } from "@openzeppelin/contracts/interfaces/IERC20.sol";

interface IStETH is IERC20 {
    /**
     * @return the entire amount of Ether controlled by the protocol.
     *
     * @dev The sum of all ETH balances in the protocol, equals to the total supply of stETH.
     */
    function getTotalPooledEther() external view returns (uint256);

    /**
     * @return the total amount of shares in existence.
     *
     * @dev The sum of all accounts' shares can be an arbitrary number, therefore
     * it is necessary to store it in order to calculate each account's relative share.
     */
    function getTotalShares() external view returns (uint256);
}