// SPDX-License-Identifier: MIT pragma solidity 0.8.7; interface IFeeAggregator { function calculateFeeAndAmountOut(uint256 amountIn) external view returns (uint256 fee, uint256 amountOut); function calculateFeeAndAmountIn(uint256 amountOut) external view returns (uint256 fee, uint256 amountIn); function setGoosebumpsFee(uint256 fee) external; }