`// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "bsc-library/contracts/IBEP20.sol";
import "bsc-library/contracts/SafeBEP20.sol";
interface IWBNB {
function deposit() external payable;
function transfer(address to, uint256 value) external returns (bool);
function withdraw(uint256) external;
}
contract BnbStaking is Ownable {
using SafeMath for uint256;
using SafeBEP20 for IBEP20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
bool inBlackList;
}
// Info of each pool.
struct PoolInfo {
IBEP20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. CAKEs to distribute per block.
uint256 lastRewardBlock; // Last block number that CAKEs distribution occurs.
uint256 accCakePerShare; // Accumulated CAKEs per share, times 1e12. See below.
}
// The REWARD TOKEN
IBEP20 public rewardToken;
// adminAddress
address public adminAddress;
// WBNB
address public immutable WBNB;
// CAKE tokens created per block.
uint256 public rewardPerBlock;
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping(address => UserInfo) public userInfo;
// limit 10 BNB here
uint256 public limitAmount = 10000000000000000000;
// Total allocation poitns. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// The block number when CAKE mining starts.
uint256 public startBlock;
// The block number when CAKE mining ends.
uint256 public bonusEndBlock;
event Deposit(address indexed user, uint256 amount);
event Withdraw(address indexed user, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 amount);
constructor(
IBEP20 _lp,
IBEP20 _rewardToken,
uint256 _rewardPerBlock,
uint256 _startBlock,
uint256 _bonusEndBlock,
address _adminAddress,
address _wbnb
) public {
rewardToken = _rewardToken;
rewardPerBlock = _rewardPerBlock;
startBlock = _startBlock;
bonusEndBlock = _bonusEndBlock;
adminAddress = _adminAddress;
WBNB = _wbnb;
// staking pool
poolInfo.push(PoolInfo({lpToken: _lp, allocPoint: 1000, lastRewardBlock: startBlock, accCakePerShare: 0}));
totalAllocPoint = 1000;
}
modifier onlyAdmin() {
require(msg.sender == adminAddress, "admin: wut?");
_;
}
receive() external payable {
assert(msg.sender == WBNB); // only accept BNB via fallback from the WBNB contract
}
// Update admin address by the previous dev.
function setAdmin(address _adminAddress) public onlyOwner {
adminAddress = _adminAddress;
}
function setBlackList(address _blacklistAddress) public onlyAdmin {
userInfo[_blacklistAddress].inBlackList = true;
}
function removeBlackList(address _blacklistAddress) public onlyAdmin {
userInfo[_blacklistAddress].inBlackList = false;
}
// Set the limit amount. Can only be called by the owner.
function setLimitAmount(uint256 _amount) public onlyOwner {
limitAmount = _amount;
}
// Return reward multiplier over the given _from to _to block.
function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) {
if (_to <= bonusEndBlock) {
return _to.sub(_from);
} else if (_from >= bonusEndBlock) {
return 0;
} else {
return bonusEndBlock.sub(_from);
}
}
// View function to see pending Reward on frontend.
function pendingReward(address _user) external view returns (uint256) {
PoolInfo storage pool = poolInfo[0];
UserInfo storage user = userInfo[_user];
uint256 accCakePerShare = pool.accCakePerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 cakeReward = multiplier.mul(rewardPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
accCakePerShare = accCakePerShare.add(cakeReward.mul(1e12).div(lpSupply));
}
return user.amount.mul(accCakePerShare).div(1e12).sub(user.rewardDebt);
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (lpSupply == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 cakeReward = multiplier.mul(rewardPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
pool.accCakePerShare = pool.accCakePerShare.add(cakeReward.mul(1e12).div(lpSupply));
pool.lastRewardBlock = block.number;
}
// Update reward variables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; ++pid) {
updatePool(pid);
}
}
// Stake tokens to SmartChef
function deposit() public payable {
PoolInfo storage pool = poolInfo[0];
UserInfo storage user = userInfo[msg.sender];
require(user.amount.add(msg.value) <= limitAmount, "exceed the top");
require(!user.inBlackList, "in black list");
updatePool(0);
if (user.amount > 0) {
uint256 pending = user.amount.mul(pool.accCakePerShare).div(1e12).sub(user.rewardDebt);
if (pending > 0) {
rewardToken.safeTransfer(address(msg.sender), pending);
}
}
if (msg.value > 0) {
IWBNB(WBNB).deposit{value: msg.value}();
assert(IWBNB(WBNB).transfer(address(this), msg.value));
user.amount = user.amount.add(msg.value);
}
user.rewardDebt = user.amount.mul(pool.accCakePerShare).div(1e12);
emit Deposit(msg.sender, msg.value);
}
function safeTransferBNB(address to, uint256 value) internal {
(bool success, ) = to.call{gas: 23000, value: value}("");
// (bool success,) = to.call{value:value}(new bytes(0));
require(success, "TransferHelper: ETH_TRANSFER_FAILED");
}
// Withdraw tokens from STAKING.
function withdraw(uint256 _amount) public {
PoolInfo storage pool = poolInfo[0];
UserInfo storage user = userInfo[msg.sender];
require(user.amount >= _amount, "withdraw: not good");
updatePool(0);
uint256 pending = user.amount.mul(pool.accCakePerShare).div(1e12).sub(user.rewardDebt);
if (pending > 0 && !user.inBlackList) {
rewardToken.safeTransfer(address(msg.sender), pending);
}
if (_amount > 0) {
user.amount = user.amount.sub(_amount);
IWBNB(WBNB).withdraw(_amount);
safeTransferBNB(address(msg.sender), _amount);
}
user.rewardDebt = user.amount.mul(pool.accCakePerShare).div(1e12);
emit Withdraw(msg.sender, _amount);
}
// Withdraw without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw() public {
PoolInfo storage pool = poolInfo[0];
UserInfo storage user = userInfo[msg.sender];
pool.lpToken.safeTransfer(address(msg.sender), user.amount);
emit EmergencyWithdraw(msg.sender, user.amount);
user.amount = 0;
user.rewardDebt = 0;
}
// Withdraw reward. EMERGENCY ONLY.
function emergencyRewardWithdraw(uint256 _amount) public onlyOwner {
require(_amount < rewardToken.balanceOf(address(this)), "not enough token");
rewardToken.safeTransfer(address(msg.sender), _amount);
}
}`
This Is The Error
Error: not found bsc-library/contracts/SafeBEP20.sol
All Imports Are Not Working 