//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma abicoder v2;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Metadata.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Enumerable.sol";

struct ExactInputSingleParams {
	address tokenIn;
	address tokenOut;
	uint24 fee;
	address recipient;
	uint256 amountIn;
	uint256 amountOutMinimum;
	uint160 sqrtPriceLimitX96;
}

struct ExactInputParams {
	bytes path;
	address recipient;
	uint256 amountIn;
	uint256 amountOutMinimum;
}

struct ExactOutputSingleParams {
	address tokenIn;
	address tokenOut;
	uint24 fee;
	address recipient;
	uint256 amountOut;
	uint256 amountInMaximum;
	uint160 sqrtPriceLimitX96;
}

struct ExactOutputParams {
	bytes path;
	address recipient;
	uint256 amountOut;
	uint256 amountInMaximum;
}

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
	/// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
	/// @dev In the implementation you must pay the pool tokens owed for the swap.
	/// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
	/// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
	/// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
	/// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
	/// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
	/// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
	/// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
	function uniswapV3SwapCallback(
		int256 amount0Delta,
		int256 amount1Delta,
		bytes calldata data
	) external;
}

interface IV3SwapRouter is IUniswapV3SwapCallback {
	/// @notice Swaps `amountIn` of one token for as much as possible of another token
	/// @dev Setting `amountIn` to 0 will cause the contract to look up its own balance,
	/// and swap the entire amount, enabling contracts to send tokens before calling this function.
	/// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
	/// @return amountOut The amount of the received token
	function exactInputSingle(ExactInputSingleParams calldata params)
		external
		payable
		returns (uint256 amountOut);

	/// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
	/// @dev Setting `amountIn` to 0 will cause the contract to look up its own balance,
	/// and swap the entire amount, enabling contracts to send tokens before calling this function.
	/// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
	/// @return amountOut The amount of the received token
	function exactInput(ExactInputParams calldata params)
		external
		payable
		returns (uint256 amountOut);

	/// @notice Swaps as little as possible of one token for `amountOut` of another token
	/// that may remain in the router after the swap.
	/// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
	/// @return amountIn The amount of the input token
	function exactOutputSingle(ExactOutputSingleParams calldata params)
		external
		payable
		returns (uint256 amountIn);

	/// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
	/// that may remain in the router after the swap.
	/// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
	/// @return amountIn The amount of the input token
	function exactOutput(ExactOutputParams calldata params)
		external
		payable
		returns (uint256 amountIn);
}

interface IApproveAndCall {}

/// @title Multicall interface
/// @notice Enables calling multiple methods in a single call to the contract
interface IMulticall {

}

/// @title MulticallExtended interface
/// @notice Enables calling multiple methods in a single call to the contract with optional validation
interface IMulticallExtended is IMulticall {

}

/// @title Self Permit
/// @notice Functionality to call permit on any EIP-2612-compliant token for use in the route
interface ISelfPermit {

}

/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V2
interface IV2SwapRouter {

}

interface ISwapRouter02 is
	IV2SwapRouter,
	IV3SwapRouter,
	IApproveAndCall,
	IMulticallExtended,
	ISelfPermit
{}