// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.10;

uint256 constant N_COINS = 2;

interface ICurvePoolStETH {
    function coins(uint256) external view returns (address);

    function balances(uint256) external view returns (uint256);

    function exchange(int128 i, int128 j, uint256 dx, uint256 min_dy) external payable;

    function exchange_underlying(int128 i, int128 j, uint256 dx, uint256 min_dy) external;

    function add_liquidity(uint256[N_COINS] memory amounts, uint256 min_mint_amount) external payable;

    function remove_liquidity(uint256 _amount, uint256[N_COINS] memory min_amounts) external;

    function get_dy_underlying(int128 i, int128 j, uint256 dx) external view returns (uint256);

    function get_dy(int128 i, int128 j, uint256 dx) external view returns (uint256);

    function get_virtual_price() external view returns (uint256);

    function virtual_price() external view returns (uint256);

    function lp_token() external view returns (address);

    function remove_liquidity_one_coin(uint256 _token_amount, int128 i, uint256 min_amount) external;

    function remove_liquidity_imbalance(uint256[N_COINS] memory amounts, uint256 max_burn_amount) external;

    function calc_token_amount(uint256[N_COINS] calldata _amounts, bool _is_deposit) external view returns (uint256);

    function A() external view returns (uint256);

    function A_precise() external view returns (uint256);

    function calc_withdraw_one_coin(uint256 _burn_amount, int128 i) external view returns (uint256);

    function admin_balances(uint256 i) external view returns (uint256);

    function admin() external view returns (address);

    function fee() external view returns (uint256);

    function admin_fee() external view returns (uint256);

    function block_timestamp_last() external view returns (uint256);

    function initial_A() external view returns (uint256);

    function future_A() external view returns (uint256);

    function initial_A_time() external view returns (uint256);

    function future_A_time() external view returns (uint256);
}