creation_sourcecode: // SPDX-License-Identifier: MIT
  
  pragma solidity >=0.6.0 <0.8.0;
  
  /* use 0.6.12 compiler version
   * @dev Provides information about the current execution context, including the
   * sender of the transaction and its data. While these are generally available
   * via msg.sender and msg.data, they should not be accessed in such a direct
   * manner, since when dealing with GSN meta-transactions the account sending and
   * paying for execution may not be the actual sender (as far as an application
   * is concerned).
   *
   * This contract is only required for intermediate, library-like contracts.
   */
  abstract contract Context {
      function _msgSender() internal view virtual returns (address payable) {
          return msg.sender;
      }
  
      function _msgData() internal view virtual returns (bytes memory) {
          this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
          return msg.data;
      }
  }
  
  // File: @openzeppelin/contracts/access/Ownable.sol
  
  pragma solidity >=0.6.0 <0.8.0;
  
  /**
   * @dev Contract module which provides a basic access control mechanism, where
   * there is an account (an owner) that can be granted exclusive access to
   * specific functions.
   *
   * By default, the owner account will be the one that deploys the contract. This
   * can later be changed with {transferOwnership}.
   *
   * This module is used through inheritance. It will make available the modifier
   * `onlyOwner`, which can be applied to your functions to restrict their use to
   * the owner.
   */
  abstract contract Ownable is Context {
      address private _owner;
  
      event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
  
      /**
       * @dev Initializes the contract setting the deployer as the initial owner.
       */
      constructor() internal {
          address msgSender = _msgSender();
          _owner = msgSender;
          emit OwnershipTransferred(address(0), msgSender);
      }
  
      /**
       * @dev Returns the address of the current owner.
       */
      function owner() public view virtual returns (address) {
          return _owner;
      }
  
      /**
       * @dev Throws if called by any account other than the owner.
       */
      modifier onlyOwner() {
          require(owner() == _msgSender(), "Ownable: caller is not the owner");
          _;
      }
  
      /**
       * @dev Leaves the contract without owner. It will not be possible to call
       * `onlyOwner` functions anymore. Can only be called by the current owner.
       *
       * NOTE: Renouncing ownership will leave the contract without an owner,
       * thereby removing any functionality that is only available to the owner.
       */
      function renounceOwnership() public virtual onlyOwner {
          emit OwnershipTransferred(_owner, address(0));
          _owner = address(0);
      }
  
      /**
       * @dev Transfers ownership of the contract to a new account (`newOwner`).
       * Can only be called by the current owner.
       */
      function transferOwnership(address newOwner) public virtual onlyOwner {
          require(newOwner != address(0), "Ownable: new owner is the zero address");
          emit OwnershipTransferred(_owner, newOwner);
          _owner = newOwner;
      }
  }
  
  // File: @openzeppelin/contracts/math/SafeMath.sol
  
  pragma solidity >=0.6.0 <0.8.0;
  
  /**
   * @dev Wrappers over Solidity's arithmetic operations with added overflow
   * checks.
   *
   * Arithmetic operations in Solidity wrap on overflow. This can easily result
   * in bugs, because programmers usually assume that an overflow raises an
   * error, which is the standard behavior in high level programming languages.
   * `SafeMath` restores this intuition by reverting the transaction when an
   * operation overflows.
   *
   * Using this library instead of the unchecked operations eliminates an entire
   * class of bugs, so it's recommended to use it always.
   */
  library SafeMath {
      /**
       * @dev Returns the addition of two unsigned integers, with an overflow flag.
       *
       * _Available since v3.4._
       */
      function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          uint256 c = a + b;
          if (c < a) return (false, 0);
          return (true, c);
      }
  
      /**
       * @dev Returns the substraction of two unsigned integers, with an overflow flag.
       *
       * _Available since v3.4._
       */
      function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          if (b > a) return (false, 0);
          return (true, a - b);
      }
  
      /**
       * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
       *
       * _Available since v3.4._
       */
      function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
          // benefit is lost if 'b' is also tested.
          // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
          if (a == 0) return (true, 0);
          uint256 c = a * b;
          if (c / a != b) return (false, 0);
          return (true, c);
      }
  
      /**
       * @dev Returns the division of two unsigned integers, with a division by zero flag.
       *
       * _Available since v3.4._
       */
      function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          if (b == 0) return (false, 0);
          return (true, a / b);
      }
  
      /**
       * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
       *
       * _Available since v3.4._
       */
      function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
          if (b == 0) return (false, 0);
          return (true, a % b);
      }
  
      /**
       * @dev Returns the addition of two unsigned integers, reverting on
       * overflow.
       *
       * Counterpart to Solidity's `+` operator.
       *
       * Requirements:
       *
       * - Addition cannot overflow.
       */
      function add(uint256 a, uint256 b) internal pure returns (uint256) {
          uint256 c = a + b;
          require(c >= a, "SafeMath: addition overflow");
          return c;
      }
  
      /**
       * @dev Returns the subtraction of two unsigned integers, reverting on
       * overflow (when the result is negative).
       *
       * Counterpart to Solidity's `-` operator.
       *
       * Requirements:
       *
       * - Subtraction cannot overflow.
       */
      function sub(uint256 a, uint256 b) internal pure returns (uint256) {
          require(b <= a, "SafeMath: subtraction overflow");
          return a - b;
      }
  
      /**
       * @dev Returns the multiplication of two unsigned integers, reverting on
       * overflow.
       *
       * Counterpart to Solidity's `*` operator.
       *
       * Requirements:
       *
       * - Multiplication cannot overflow.
       */
      function mul(uint256 a, uint256 b) internal pure returns (uint256) {
          if (a == 0) return 0;
          uint256 c = a * b;
          require(c / a == b, "SafeMath: multiplication overflow");
          return c;
      }
  
      /**
       * @dev Returns the integer division of two unsigned integers, reverting on
       * division by zero. The result is rounded towards zero.
       *
       * Counterpart to Solidity's `/` operator. Note: this function uses a
       * `revert` opcode (which leaves remaining gas untouched) while Solidity
       * uses an invalid opcode to revert (consuming all remaining gas).
       *
       * Requirements:
       *
       * - The divisor cannot be zero.
       */
      function div(uint256 a, uint256 b) internal pure returns (uint256) {
          require(b > 0, "SafeMath: division by zero");
          return a / b;
      }
  
      /**
       * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
       * reverting when dividing by zero.
       *
       * Counterpart to Solidity's `%` operator. This function uses a `revert`
       * opcode (which leaves remaining gas untouched) while Solidity uses an
       * invalid opcode to revert (consuming all remaining gas).
       *
       * Requirements:
       *
       * - The divisor cannot be zero.
       */
      function mod(uint256 a, uint256 b) internal pure returns (uint256) {
          require(b > 0, "SafeMath: modulo by zero");
          return a % b;
      }
  
      /**
       * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
       * overflow (when the result is negative).
       *
       * CAUTION: This function is deprecated because it requires allocating memory for the error
       * message unnecessarily. For custom revert reasons use {trySub}.
       *
       * Counterpart to Solidity's `-` operator.
       *
       * Requirements:
       *
       * - Subtraction cannot overflow.
       */
      function sub(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          require(b <= a, errorMessage);
          return a - b;
      }
  
      /**
       * @dev Returns the integer division of two unsigned integers, reverting with custom message on
       * division by zero. The result is rounded towards zero.
       *
       * CAUTION: This function is deprecated because it requires allocating memory for the error
       * message unnecessarily. For custom revert reasons use {tryDiv}.
       *
       * Counterpart to Solidity's `/` operator. Note: this function uses a
       * `revert` opcode (which leaves remaining gas untouched) while Solidity
       * uses an invalid opcode to revert (consuming all remaining gas).
       *
       * Requirements:
       *
       * - The divisor cannot be zero.
       */
      function div(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          require(b > 0, errorMessage);
          return a / b;
      }
  
      /**
       * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
       * reverting with custom message when dividing by zero.
       *
       * CAUTION: This function is deprecated because it requires allocating memory for the error
       * message unnecessarily. For custom revert reasons use {tryMod}.
       *
       * Counterpart to Solidity's `%` operator. This function uses a `revert`
       * opcode (which leaves remaining gas untouched) while Solidity uses an
       * invalid opcode to revert (consuming all remaining gas).
       *
       * Requirements:
       *
       * - The divisor cannot be zero.
       */
      function mod(
          uint256 a,
          uint256 b,
          string memory errorMessage
      ) internal pure returns (uint256) {
          require(b > 0, errorMessage);
          return a % b;
      }
  }
  
  // File: @openzeppelin/contracts/utils/ReentrancyGuard.sol
  
  pragma solidity >=0.6.0 <0.8.0;
  
  /**
   * @dev Contract module that helps prevent reentrant calls to a function.
   *
   * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
   * available, which can be applied to functions to make sure there are no nested
   * (reentrant) calls to them.
   *
   * Note that because there is a single `nonReentrant` guard, functions marked as
   * `nonReentrant` may not call one another. This can be worked around by making
   * those functions `private`, and then adding `external` `nonReentrant` entry
   * points to them.
   *
   * TIP: If you would like to learn more about reentrancy and alternative ways
   * to protect against it, check out our blog post
   * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
   */
  abstract contract ReentrancyGuard {
      // Booleans are more expensive than uint256 or any type that takes up a full
      // word because each write operation emits an extra SLOAD to first read the
      // slot's contents, replace the bits taken up by the boolean, and then write
      // back. This is the compiler's defense against contract upgrades and
      // pointer aliasing, and it cannot be disabled.
  
      // The values being non-zero value makes deployment a bit more expensive,
      // but in exchange the refund on every call to nonReentrant will be lower in
      // amount. Since refunds are capped to a percentage of the total
      // transaction's gas, it is best to keep them low in cases like this one, to
      // increase the likelihood of the full refund coming into effect.
      uint256 private constant _NOT_ENTERED = 1;
      uint256 private constant _ENTERED = 2;
  
      uint256 private _status;
  
      constructor() internal {
          _status = _NOT_ENTERED;
      }
  
      /**
       * @dev Prevents a contract from calling itself, directly or indirectly.
       * Calling a `nonReentrant` function from another `nonReentrant`
       * function is not supported. It is possible to prevent this from happening
       * by making the `nonReentrant` function external, and make it call a
       * `private` function that does the actual work.
       */
      modifier nonReentrant() {
          // On the first call to nonReentrant, _notEntered will be true
          require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
  
          // Any calls to nonReentrant after this point will fail
          _status = _ENTERED;
  
          _;
  
          // By storing the original value once again, a refund is triggered (see
          // https://eips.ethereum.org/EIPS/eip-2200)
          _status = _NOT_ENTERED;
      }
  }
  
  // File: bsc-library/contracts/IBEP20.sol
  
  pragma solidity >=0.4.0;
  
  interface IBEP20 {
      /**
       * @dev Returns the amount of tokens in existence.
       */
      function totalSupply() external view returns (uint256);
  
      /**
       * @dev Returns the token decimals.
       */
      function decimals() external view returns (uint8);
  
      /**
       * @dev Returns the token symbol.
       */
      function symbol() external view returns (string memory);
  
      /**
       * @dev Returns the token name.
       */
      function name() external view returns (string memory);
  
      /**
       * @dev Returns the bep token owner.
       */
      function getOwner() external view returns (address);
  
      /**
       * @dev Returns the amount of tokens owned by `account`.
       */
      function balanceOf(address account) external view returns (uint256);
  
      /**
       * @dev Moves `amount` tokens from the caller's account to `recipient`.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * Emits a {Transfer} event.
       */
      function transfer(address recipient, uint256 amount) external returns (bool);
  
      /**
       * @dev Returns the remaining number of tokens that `spender` will be
       * allowed to spend on behalf of `owner` through {transferFrom}. This is
       * zero by default.
       *
       * This value changes when {approve} or {transferFrom} are called.
       */
      function allowance(address _owner, address spender) external view returns (uint256);
  
      /**
       * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * IMPORTANT: Beware that changing an allowance with this method brings the risk
       * that someone may use both the old and the new allowance by unfortunate
       * transaction ordering. One possible solution to mitigate this race
       * condition is to first reduce the spender's allowance to 0 and set the
       * desired value afterwards:
       * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
       *
       * Emits an {Approval} event.
       */
      function approve(address spender, uint256 amount) external returns (bool);
  
      /**
       * @dev Moves `amount` tokens from `sender` to `recipient` using the
       * allowance mechanism. `amount` is then deducted from the caller's
       * allowance.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * Emits a {Transfer} event.
       */
      function transferFrom(
          address sender,
          address recipient,
          uint256 amount
      ) external returns (bool);
  
      /**
       * @dev Emitted when `value` tokens are moved from one account (`from`) to
       * another (`to`).
       *
       * Note that `value` may be zero.
       */
      event Transfer(address indexed from, address indexed to, uint256 value);
  
      /**
       * @dev Emitted when the allowance of a `spender` for an `owner` is set by
       * a call to {approve}. `value` is the new allowance.
       */
      event Approval(address indexed owner, address indexed spender, uint256 value);
  }
  
  // File: @openzeppelin/contracts/utils/Address.sol
  
  pragma solidity >=0.6.2 <0.8.0;
  
  /**
   * @dev Collection of functions related to the address type
   */
  library Address {
      /**
       * @dev Returns true if `account` is a contract.
       *
       * [IMPORTANT]
       * ====
       * It is unsafe to assume that an address for which this function returns
       * false is an externally-owned account (EOA) and not a contract.
       *
       * Among others, `isContract` will return false for the following
       * types of addresses:
       *
       *  - an externally-owned account
       *  - a contract in construction
       *  - an address where a contract will be created
       *  - an address where a contract lived, but was destroyed
       * ====
       */
      function isContract(address account) internal view returns (bool) {
          // This method relies on extcodesize, which returns 0 for contracts in
          // construction, since the code is only stored at the end of the
          // constructor execution.
  
          uint256 size;
          // solhint-disable-next-line no-inline-assembly
          assembly {
              size := extcodesize(account)
          }
          return size > 0;
      }
  
      /**
       * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
       * `recipient`, forwarding all available gas and reverting on errors.
       *
       * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
       * of certain opcodes, possibly making contracts go over the 2300 gas limit
       * imposed by `transfer`, making them unable to receive funds via
       * `transfer`. {sendValue} removes this limitation.
       *
       * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
       *
       * IMPORTANT: because control is transferred to `recipient`, care must be
       * taken to not create reentrancy vulnerabilities. Consider using
       * {ReentrancyGuard} or the
       * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
       */
      function sendValue(address payable recipient, uint256 amount) internal {
          require(address(this).balance >= amount, "Address: insufficient balance");
  
          // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
          (bool success, ) = recipient.call{value: amount}("");
          require(success, "Address: unable to send value, recipient may have reverted");
      }
  
      /**
       * @dev Performs a Solidity function call using a low level `call`. A
       * plain`call` is an unsafe replacement for a function call: use this
       * function instead.
       *
       * If `target` reverts with a revert reason, it is bubbled up by this
       * function (like regular Solidity function calls).
       *
       * Returns the raw returned data. To convert to the expected return value,
       * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
       *
       * Requirements:
       *
       * - `target` must be a contract.
       * - calling `target` with `data` must not revert.
       *
       * _Available since v3.1._
       */
      function functionCall(address target, bytes memory data) internal returns (bytes memory) {
          return functionCall(target, data, "Address: low-level call failed");
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
       * `errorMessage` as a fallback revert reason when `target` reverts.
       *
       * _Available since v3.1._
       */
      function functionCall(
          address target,
          bytes memory data,
          string memory errorMessage
      ) internal returns (bytes memory) {
          return functionCallWithValue(target, data, 0, errorMessage);
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
       * but also transferring `value` wei to `target`.
       *
       * Requirements:
       *
       * - the calling contract must have an ETH balance of at least `value`.
       * - the called Solidity function must be `payable`.
       *
       * _Available since v3.1._
       */
      function functionCallWithValue(
          address target,
          bytes memory data,
          uint256 value
      ) internal returns (bytes memory) {
          return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
      }
  
      /**
       * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
       * with `errorMessage` as a fallback revert reason when `target` reverts.
       *
       * _Available since v3.1._
       */
      function functionCallWithValue(
          address target,
          bytes memory data,
          uint256 value,
          string memory errorMessage
      ) internal returns (bytes memory) {
          require(address(this).balance >= value, "Address: insufficient balance for call");
          require(isContract(target), "Address: call to non-contract");
  
          // solhint-disable-next-line avoid-low-level-calls
          (bool success, bytes memory returndata) = target.call{value: value}(data);
          return _verifyCallResult(success, returndata, errorMessage);
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
       * but performing a static call.
       *
       * _Available since v3.3._
       */
      function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
          return functionStaticCall(target, data, "Address: low-level static call failed");
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
       * but performing a static call.
       *
       * _Available since v3.3._
       */
      function functionStaticCall(
          address target,
          bytes memory data,
          string memory errorMessage
      ) internal view returns (bytes memory) {
          require(isContract(target), "Address: static call to non-contract");
  
          // solhint-disable-next-line avoid-low-level-calls
          (bool success, bytes memory returndata) = target.staticcall(data);
          return _verifyCallResult(success, returndata, errorMessage);
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
       * but performing a delegate call.
       *
       * _Available since v3.4._
       */
      function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
          return functionDelegateCall(target, data, "Address: low-level delegate call failed");
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
       * but performing a delegate call.
       *
       * _Available since v3.4._
       */
      function functionDelegateCall(
          address target,
          bytes memory data,
          string memory errorMessage
      ) internal returns (bytes memory) {
          require(isContract(target), "Address: delegate call to non-contract");
  
          // solhint-disable-next-line avoid-low-level-calls
          (bool success, bytes memory returndata) = target.delegatecall(data);
          return _verifyCallResult(success, returndata, errorMessage);
      }
  
      function _verifyCallResult(
          bool success,
          bytes memory returndata,
          string memory errorMessage
      ) private pure returns (bytes memory) {
          if (success) {
              return returndata;
          } else {
              // Look for revert reason and bubble it up if present
              if (returndata.length > 0) {
                  // The easiest way to bubble the revert reason is using memory via assembly
  
                  // solhint-disable-next-line no-inline-assembly
                  assembly {
                      let returndata_size := mload(returndata)
                      revert(add(32, returndata), returndata_size)
                  }
              } else {
                  revert(errorMessage);
              }
          }
      }
  }
  
  // File: bsc-library/contracts/SafeBEP20.sol
  
  pragma solidity ^0.6.0;
  
  /**
   * @title SafeBEP20
   * @dev Wrappers around BEP20 operations that throw on failure (when the token
   * contract returns false). Tokens that return no value (and instead revert or
   * throw on failure) are also supported, non-reverting calls are assumed to be
   * successful.
   * To use this library you can add a `using SafeBEP20 for IBEP20;` statement to your contract,
   * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
   */
  library SafeBEP20 {
      using SafeMath for uint256;
      using Address for address;
  
      function safeTransfer(
          IBEP20 token,
          address to,
          uint256 value
      ) internal {
          _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
      }
  
      function safeTransferFrom(
          IBEP20 token,
          address from,
          address to,
          uint256 value
      ) internal {
          _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
      }
  
      /**
       * @dev Deprecated. This function has issues similar to the ones found in
       * {IBEP20-approve}, and its usage is discouraged.
       *
       * Whenever possible, use {safeIncreaseAllowance} and
       * {safeDecreaseAllowance} instead.
       */
      function safeApprove(
          IBEP20 token,
          address spender,
          uint256 value
      ) internal {
          // safeApprove should only be called when setting an initial allowance,
          // or when resetting it to zero. To increase and decrease it, use
          // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
          // solhint-disable-next-line max-line-length
          require(
              (value == 0) || (token.allowance(address(this), spender) == 0),
              "SafeBEP20: approve from non-zero to non-zero allowance"
          );
          _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
      }
  
      function safeIncreaseAllowance(
          IBEP20 token,
          address spender,
          uint256 value
      ) internal {
          uint256 newAllowance = token.allowance(address(this), spender).add(value);
          _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
      }
  
      function safeDecreaseAllowance(
          IBEP20 token,
          address spender,
          uint256 value
      ) internal {
          uint256 newAllowance =
              token.allowance(address(this), spender).sub(value, "SafeBEP20: decreased allowance below zero");
          _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
      }
  
      /**
       * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
       * on the return value: the return value is optional (but if data is returned, it must not be false).
       * @param token The token targeted by the call.
       * @param data The call data (encoded using abi.encode or one of its variants).
       */
      function _callOptionalReturn(IBEP20 token, bytes memory data) private {
          // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
          // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
          // the target address contains contract code and also asserts for success in the low-level call.
  
          bytes memory returndata = address(token).functionCall(data, "SafeBEP20: low-level call failed");
          if (returndata.length > 0) {
              // Return data is optional
              // solhint-disable-next-line max-line-length
              require(abi.decode(returndata, (bool)), "SafeBEP20: BEP20 operation did not succeed");
          }
      }
  }
  
  // File: contracts/SmartChefInitializable.sol
  
  pragma solidity 0.6.12;
  
  contract CadaiStake is Ownable, ReentrancyGuard {
      using SafeMath for uint256;
      using SafeBEP20 for IBEP20;
  
      // Accrued token per share
      uint256 public accTokenPerShare;
  
      // The block number when mining ends.
      uint256 public bonusEndBlock;
  
      // The block number when mining starts.
      uint256 public startBlock;
  
      // The block number of the last pool update
      uint256 public lastRewardBlock;
  
      // tokens created per block.
      uint256 public rewardPerBlock;
  
      // The precision factor
      uint256 public PRECISION_FACTOR;
  
      // The staked & reward token same
      IBEP20 public stakedToken;
  
      uint256 public stakedTokenSupply;
      uint256 public rewardTokenSupplyRemaining;
  
      uint256 public vestingTime;
      // Info of each user that stakes tokens (stakedToken)
      mapping(address => UserInfo) public userInfo;
  
      struct UserInfo {
          uint256 amount; // How many staked tokens the user has provided
          uint256 rewardDebt; // Reward debt
          uint256 lastDepositedAt;
      }
  
      event AdminTokenRecovery(address tokenRecovered, uint256 amount);
      event Deposit(address indexed user, uint256 amount);
      event EmergencyWithdraw(address indexed user, uint256 amount);
      event NewStartAndEndBlocks(uint256 startBlock, uint256 endBlock);
      event NewRewardPerBlock(uint256 rewardPerBlock);
      event RewardsStop(uint256 blockNumber);
      event Withdraw(address indexed user, uint256 amount);
  
      constructor() public {
          stakedToken = IBEP20(0x4229725D41e2233d75B47675b55c6781df0b56A7);
          rewardPerBlock = 10**18 / 100; // 0.01 token per block
          startBlock = block.number;
          bonusEndBlock = block.number.add(10512000); // One year
  
          PRECISION_FACTOR = uint256(10**12);
  
          lastRewardBlock = startBlock;
      }
  
      /*
       * @notice Deposit staked tokens and collect reward tokens (if any)
       * @param _amount: amount to withdraw (in stakedToken)
       */
      function deposit(uint256 _amount) external nonReentrant {
          UserInfo storage user = userInfo[msg.sender];
          require(_amount > 0, "Can't deposit zero amount");
  
          
  
          _updatePool();
  
          if (user.amount > 0) {
              uint256 pending = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt);
              if (pending > 0) {
                  stakedToken.safeTransfer(address(msg.sender), pending);
              }
          }
  
          if (_amount > 0) {
              user.amount = user.amount.add(_amount);
              stakedToken.safeTransferFrom(address(msg.sender), address(this), _amount);
              stakedTokenSupply = stakedTokenSupply.add(_amount);
          }
  
          user.lastDepositedAt = block.timestamp;
          user.rewardDebt = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR);
  
          emit Deposit(msg.sender, _amount);
      }
  
      /*
       * Harvest reward
       */
      function harvest() public {
          _updatePool();
          UserInfo storage user = userInfo[msg.sender];
  
          if (user.amount > 0) {
              uint256 pending = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt);
              if (pending > 0) {
                  stakedToken.safeTransfer(address(msg.sender), pending);
                  emit Withdraw(msg.sender, pending);
              }
          }
          user.rewardDebt = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR);
      }
  
  
      /*
       * @notice Withdraw staked tokens and collect reward tokens
       * @param _amount: amount to withdraw (in stakedToken)
       */
      function withdraw(uint256 _amount) external nonReentrant {
          UserInfo storage user = userInfo[msg.sender];
          require(user.amount >= _amount, "Amount to withdraw too high");
          require(block.timestamp >= user.lastDepositedAt.add(vestingTime), "Vesting time requires!");
  
          _updatePool();
  
          uint256 pending = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt);
  
          if (_amount > 0) {
              user.amount = user.amount.sub(_amount);
              stakedTokenSupply = stakedTokenSupply.sub(_amount);
              stakedToken.safeTransfer(address(msg.sender), _amount);
          }
  
          if (pending > 0) {
              stakedToken.safeTransfer(address(msg.sender), pending);
          }
  
          user.rewardDebt = user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR);
  
          emit Withdraw(msg.sender, _amount);
      }
  
      /*
       * @notice Withdraw staked tokens without caring about rewards rewards
       * @dev Needs to be for emergency.
       */
      function emergencyWithdraw() external nonReentrant {
          UserInfo storage user = userInfo[msg.sender];
          require(block.timestamp >= user.lastDepositedAt.add(vestingTime), "Vesting time requires!");
          uint256 amountToTransfer = user.amount;
          user.amount = 0;
          user.rewardDebt = 0;
  
          if (amountToTransfer > 0) {
              stakedTokenSupply = stakedTokenSupply.sub(amountToTransfer);
              stakedToken.safeTransfer(address(msg.sender), amountToTransfer);
          }
  
          emit EmergencyWithdraw(msg.sender, user.amount);
      }
  
      /*
       * @notice Stop rewards
       * @dev Only callable by owner. Needs to be for emergency.
       */
      function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {
          require(_amount <= rewardTokenSupplyRemaining, "Only able to withdraw amount that not add to reward divident");
          rewardTokenSupplyRemaining = rewardTokenSupplyRemaining.sub(_amount);
          stakedToken.safeTransfer(address(msg.sender), _amount);
      }
  
      /**
       * @notice It allows the admin to recover wrong tokens sent to the contract
       * @param _tokenAddress: the address of the token to withdraw
       * @param _tokenAmount: the number of tokens to withdraw
       * @dev This function is only callable by admin.
       */
      function recoverWrongTokens(address _tokenAddress, uint256 _tokenAmount) external onlyOwner {
          require(_tokenAddress != address(stakedToken), "Cannot be staked token");
          require(_tokenAddress != address(stakedToken), "Cannot be reward token");
  
          IBEP20(_tokenAddress).safeTransfer(address(msg.sender), _tokenAmount);
  
          emit AdminTokenRecovery(_tokenAddress, _tokenAmount);
      }
  
      /*
       * @notice Stop rewards
       * @dev Only callable by owner
       */
      function stopReward() external onlyOwner {
          bonusEndBlock = block.number;
      }
  
      function depositReward(uint256 _amount) external onlyOwner {
          rewardTokenSupplyRemaining = rewardTokenSupplyRemaining.add(_amount);
          stakedToken.safeTransferFrom(address(msg.sender), address(this), _amount);
      }
  
      /*
       * @notice Update reward per block
       * @dev Only callable by owner.
       * @param _rewardPerBlock: the reward per block
       */
      function updateRewardPerBlock(uint256 _rewardPerBlock) external onlyOwner {
          rewardPerBlock = _rewardPerBlock;
          emit NewRewardPerBlock(_rewardPerBlock);
      }
  
      /**
       * @notice It allows the admin to update start and end blocks
       * @dev This function is only callable by owner.
       * @param _startBlock: the new start block
       * @param _bonusEndBlock: the new end block
       */
      function updateStartAndEndBlocks(uint256 _startBlock, uint256 _bonusEndBlock) external onlyOwner {
          require(_startBlock < _bonusEndBlock, "New startBlock must be lower than new endBlock");
          require(block.number < _startBlock, "New startBlock must be higher than current block");
  
          startBlock = _startBlock;
          bonusEndBlock = _bonusEndBlock;
  
          // Set the lastRewardBlock as the startBlock
          lastRewardBlock = startBlock;
  
          emit NewStartAndEndBlocks(_startBlock, _bonusEndBlock);
      }
  
      /*
       * @notice View function to see pending reward on frontend.
       * @param _user: user address
       * @return Pending reward for a given user
       */
      function pendingReward(address _user) external view returns (uint256) {
          UserInfo storage user = userInfo[_user];
          if (block.number > lastRewardBlock && stakedTokenSupply != 0) {
              uint256 multiplier = _getMultiplier(lastRewardBlock, block.number);
              uint256 rewardAmount = multiplier.mul(rewardPerBlock);
              if(rewardAmount > rewardTokenSupplyRemaining){
                  rewardAmount = rewardTokenSupplyRemaining;
              }
              uint256 adjustedTokenPerShare =
                  accTokenPerShare.add(rewardAmount.mul(PRECISION_FACTOR).div(stakedTokenSupply));
              return user.amount.mul(adjustedTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt);
          } else {
              return user.amount.mul(accTokenPerShare).div(PRECISION_FACTOR).sub(user.rewardDebt);
          }
      }
  
      /*
       * @notice Update reward variables of the given pool to be up-to-date.
       */
      function _updatePool() internal {
          if (block.number <= lastRewardBlock) {
              return;
          }
  
          if (stakedTokenSupply == 0) {
              lastRewardBlock = block.number;
              return;
          }
  
          uint256 multiplier = _getMultiplier(lastRewardBlock, block.number);
          uint256 rewardAmount = multiplier.mul(rewardPerBlock);
          if(rewardAmount > rewardTokenSupplyRemaining){
              rewardAmount = rewardTokenSupplyRemaining;
          }
          rewardTokenSupplyRemaining = rewardTokenSupplyRemaining.sub(rewardAmount);
  
          accTokenPerShare = accTokenPerShare.add(rewardAmount.mul(PRECISION_FACTOR).div(stakedTokenSupply));
          lastRewardBlock = block.number;
      }
  
      /*
       * @notice Return reward multiplier over the given _from to _to block.
       * @param _from: block to start
       * @param _to: block to finish
       */
      function _getMultiplier(uint256 _from, uint256 _to) internal view returns (uint256) {
          if (_to <= bonusEndBlock) {
              return _to.sub(_from);
          } else if (_from >= bonusEndBlock) {
              return 0;
          } else {
              return bonusEndBlock.sub(_from);
          }
      }
  
      function updateVestingTime(uint256 priodInSecond) external onlyOwner {
          vestingTime = priodInSecond;
      }
  }