// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity ^0.8.0;

interface IDEX {
    event Swaped(address indexed sender, address[] path, uint256 supply_amount, uint256 target_amount);
    event AddedLiquidity(address indexed sender, address indexed tokenA, address indexed tokenB, uint256 maxAmountA, uint256 maxAmountB);
    event RemovedLiquidity(address indexed sender, address indexed tokenA, address indexed tokenB, uint256 remove_share);

    // Get liquidity pool of the currency_id_a and currency_id_b.
    // Returns (liquidity_a, liquidity_b)
    function getLiquidityPool(address tokenA, address tokenB) external view returns (uint256, uint256);

    // Get Liquidity token address.
    // Returns (liquidity_token_address)
    function getLiquidityTokenAddress(address tokenA, address tokenB) external view returns (address);

    // Get swap target amount.
    // Returns (target_amount)
    function getSwapTargetAmount(address[] calldata path, uint256 supplyAmount) external view returns (uint256);

    // Get swap supply amount.
    // Returns (supply_amount)
    function getSwapSupplyAmount(address[] calldata path, uint256 targetAmount) external view returns (uint256);

    // Swap with exact supply.
    // Returns a boolean value indicating whether the operation succeeded.
    function swapWithExactSupply(address[] calldata path, uint256 supplyAmount, uint256 minTargetAmount) external returns (bool);

    // Swap with exact target.
    // Returns a boolean value indicating whether the operation succeeded.
    function swapWithExactTarget(address[] calldata path, uint256 targetAmount, uint256 maxSupplyAmount) external returns (bool);

    // Add liquidity to the trading pair.
    // Returns a boolean value indicating whether the operation succeeded.
    function addLiquidity(address tokenA, address tokenB, uint256 maxAmountA, uint256 maxAmountB, uint256 minShareIncrement) external returns (bool);

    // Remove liquidity from the trading pair.
    // Returns a boolean value indicating whether the operation succeeded.
    function removeLiquidity(address tokenA, address tokenB, uint256 removeShare, uint256 minWithdrawnA, uint256 minWithdrawnB) external returns (bool);
}