pragma solidity >=0.5.0; interface IVBNB { function mint() external payable; function transfer(address to, uint value) external returns (bool); function balanceOf(address owner) external view returns (uint); function borrow(uint borrowAmount) external returns (uint); function repayBorrow() external payable; function redeem(uint redeemTokens) external returns (uint); function borrowBalanceStored(address account) external view returns (uint); }