/**
 * Copyright 2017-2021, bZeroX, LLC <https://bzx.network/>. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0.
 */

pragma solidity 0.5.17;

interface ISwapsImpl {
	function internalSwap(
		address sourceTokenAddress,
		address destTokenAddress,
		address receiverAddress,
		address returnToSenderAddress,
		uint256 minSourceTokenAmount,
		uint256 maxSourceTokenAmount,
		uint256 requiredDestTokenAmount
	) external payable returns (uint256 destTokenAmountReceived, uint256 sourceTokenAmountUsed);

	function internalExpectedRate(
		address sourceTokenAddress,
		address destTokenAddress,
		uint256 sourceTokenAmount,
		address optionalContractAddress
	) external view returns (uint256);

	function internalExpectedReturn(
		address sourceTokenAddress,
		address destTokenAddress,
		uint256 sourceTokenAmount,
		address sovrynSwapContractRegistryAddress
	) external view returns (uint256 expectedReturn);
}