//SPDX-License-Identifier: MIT pragma solidity ^0.7.0; pragma experimental ABIEncoderV2; interface IStakingRewards { function stake(uint256 amount) external; function withdraw(uint256 amount) external; function getReward() external; function balanceOf(address) external view returns(uint); } interface StakingERC20Mapping { struct StakingData { address stakingPool; address stakingToken; address rewardToken; } function stakingMapping(bytes32) external view returns(StakingData memory); }