creation_sourcecode: // SPDX-License-Identifier: MIT
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @dev Collection of functions related to the address type
   */
  library Address {
      /**
       * @dev The ETH balance of the account is not enough to perform the operation.
       */
      error AddressInsufficientBalance(address account);
  
      /**
       * @dev There's no code at `target` (it is not a contract).
       */
      error AddressEmptyCode(address target);
  
      /**
       * @dev A call to an address target failed. The target may have reverted.
       */
      error FailedInnerCall();
  
      /**
       * @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://consensys.net/diligence/blog/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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
       */
      function sendValue(address payable recipient, uint256 amount) internal {
          if (address(this).balance < amount) {
              revert AddressInsufficientBalance(address(this));
          }
  
          (bool success, ) = recipient.call{value: amount}("");
          if (!success) {
              revert FailedInnerCall();
          }
      }
  
      /**
       * @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 or custom error, it is bubbled
       * up by this function (like regular Solidity function calls). However, if
       * the call reverted with no returned reason, this function reverts with a
       * {FailedInnerCall} error.
       *
       * 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.
       */
      function functionCall(address target, bytes memory data) internal returns (bytes memory) {
          return functionCallWithValue(target, data, 0);
      }
  
      /**
       * @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`.
       */
      function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
          if (address(this).balance < value) {
              revert AddressInsufficientBalance(address(this));
          }
          (bool success, bytes memory returndata) = target.call{value: value}(data);
          return verifyCallResultFromTarget(target, success, returndata);
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
       * but performing a static call.
       */
      function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
          (bool success, bytes memory returndata) = target.staticcall(data);
          return verifyCallResultFromTarget(target, success, returndata);
      }
  
      /**
       * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
       * but performing a delegate call.
       */
      function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
          (bool success, bytes memory returndata) = target.delegatecall(data);
          return verifyCallResultFromTarget(target, success, returndata);
      }
  
      /**
       * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
       * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
       * unsuccessful call.
       */
      function verifyCallResultFromTarget(
          address target,
          bool success,
          bytes memory returndata
      ) internal view returns (bytes memory) {
          if (!success) {
              _revert(returndata);
          } else {
              // only check if target is a contract if the call was successful and the return data is empty
              // otherwise we already know that it was a contract
              if (returndata.length == 0 && target.code.length == 0) {
                  revert AddressEmptyCode(target);
              }
              return returndata;
          }
      }
  
      /**
       * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
       * revert reason or with a default {FailedInnerCall} error.
       */
      function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
          if (!success) {
              _revert(returndata);
          } else {
              return returndata;
          }
      }
  
      /**
       * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
       */
      function _revert(bytes memory returndata) private pure {
          // 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
              /// @solidity memory-safe-assembly
              assembly {
                  let returndata_size := mload(returndata)
                  revert(add(32, returndata), returndata_size)
              }
          } else {
              revert FailedInnerCall();
          }
      }
  }
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/introspection/IERC165.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @dev Interface of the ERC-165 standard, as defined in the
   * https://eips.ethereum.org/EIPS/eip-165[ERC].
   *
   * Implementers can declare support of contract interfaces, which can then be
   * queried by others ({ERC165Checker}).
   *
   * For an implementation, see {ERC165}.
   */
  interface IERC165 {
      /**
       * @dev Returns true if this contract implements the interface defined by
       * `interfaceId`. See the corresponding
       * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
       * to learn more about how these ids are created.
       *
       * This function call must use less than 30 000 gas.
       */
      function supportsInterface(bytes4 interfaceId) external view returns (bool);
  }
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/interfaces/IERC165.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)
  
  pragma solidity ^0.8.20;
  
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @dev Interface of the ERC-20 standard as defined in the ERC.
   */
  interface IERC20 {
      /**
       * @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);
  
      /**
       * @dev Returns the value of tokens in existence.
       */
      function totalSupply() external view returns (uint256);
  
      /**
       * @dev Returns the value of tokens owned by `account`.
       */
      function balanceOf(address account) external view returns (uint256);
  
      /**
       * @dev Moves a `value` amount of tokens from the caller's account to `to`.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * Emits a {Transfer} event.
       */
      function transfer(address to, uint256 value) 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 a `value` amount of tokens 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 value) external returns (bool);
  
      /**
       * @dev Moves a `value` amount of tokens from `from` to `to` using the
       * allowance mechanism. `value` is then deducted from the caller's
       * allowance.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * Emits a {Transfer} event.
       */
      function transferFrom(address from, address to, uint256 value) external returns (bool);
  }
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/interfaces/IERC20.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)
  
  pragma solidity ^0.8.20;
  
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/interfaces/IERC1363.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1363.sol)
  
  pragma solidity ^0.8.20;
  
  
  
  /**
   * @title IERC1363
   * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
   *
   * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
   * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
   */
  interface IERC1363 is IERC20, IERC165 {
      /*
       * Note: the ERC-165 identifier for this interface is 0xb0202a11.
       * 0xb0202a11 ===
       *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
       *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
       *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
       *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
       *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
       *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
       */
  
      /**
       * @dev Moves a `value` amount of tokens from the caller's account to `to`
       * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
       * @param to The address which you want to transfer to.
       * @param value The amount of tokens to be transferred.
       * @return A boolean value indicating whether the operation succeeded unless throwing.
       */
      function transferAndCall(address to, uint256 value) external returns (bool);
  
      /**
       * @dev Moves a `value` amount of tokens from the caller's account to `to`
       * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
       * @param to The address which you want to transfer to.
       * @param value The amount of tokens to be transferred.
       * @param data Additional data with no specified format, sent in call to `to`.
       * @return A boolean value indicating whether the operation succeeded unless throwing.
       */
      function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);
  
      /**
       * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
       * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
       * @param from The address which you want to send tokens from.
       * @param to The address which you want to transfer to.
       * @param value The amount of tokens to be transferred.
       * @return A boolean value indicating whether the operation succeeded unless throwing.
       */
      function transferFromAndCall(address from, address to, uint256 value) external returns (bool);
  
      /**
       * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
       * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
       * @param from The address which you want to send tokens from.
       * @param to The address which you want to transfer to.
       * @param value The amount of tokens to be transferred.
       * @param data Additional data with no specified format, sent in call to `to`.
       * @return A boolean value indicating whether the operation succeeded unless throwing.
       */
      function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);
  
      /**
       * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
       * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
       * @param spender The address which will spend the funds.
       * @param value The amount of tokens to be spent.
       * @return A boolean value indicating whether the operation succeeded unless throwing.
       */
      function approveAndCall(address spender, uint256 value) external returns (bool);
  
      /**
       * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
       * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
       * @param spender The address which will spend the funds.
       * @param value The amount of tokens to be spent.
       * @param data Additional data with no specified format, sent in call to `spender`.
       * @return A boolean value indicating whether the operation succeeded unless throwing.
       */
      function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
  }
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/utils/SafeERC20.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)
  
  pragma solidity ^0.8.20;
  
  
  
  
  /**
   * @title SafeERC20
   * @dev Wrappers around ERC-20 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 SafeERC20 for IERC20;` statement to your contract,
   * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
   */
  library SafeERC20 {
      using Address for address;
  
      /**
       * @dev An operation with an ERC-20 token failed.
       */
      error SafeERC20FailedOperation(address token);
  
      /**
       * @dev Indicates a failed `decreaseAllowance` request.
       */
      error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);
  
      /**
       * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
       * non-reverting calls are assumed to be successful.
       */
      function safeTransfer(IERC20 token, address to, uint256 value) internal {
          _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
      }
  
      /**
       * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
       * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
       */
      function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
          _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
      }
  
      /**
       * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
       * non-reverting calls are assumed to be successful.
       */
      function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
          uint256 oldAllowance = token.allowance(address(this), spender);
          forceApprove(token, spender, oldAllowance + value);
      }
  
      /**
       * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
       * value, non-reverting calls are assumed to be successful.
       */
      function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
          unchecked {
              uint256 currentAllowance = token.allowance(address(this), spender);
              if (currentAllowance < requestedDecrease) {
                  revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
              }
              forceApprove(token, spender, currentAllowance - requestedDecrease);
          }
      }
  
      /**
       * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
       * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
       * to be set to zero before setting it to a non-zero value, such as USDT.
       */
      function forceApprove(IERC20 token, address spender, uint256 value) internal {
          bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));
  
          if (!_callOptionalReturnBool(token, approvalCall)) {
              _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
              _callOptionalReturn(token, approvalCall);
          }
      }
  
      /**
       * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
       * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
       * targeting contracts.
       *
       * Reverts if the returned value is other than `true`.
       */
      function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
          if (to.code.length == 0) {
              safeTransfer(token, to, value);
          } else if (!token.transferAndCall(to, value, data)) {
              revert SafeERC20FailedOperation(address(token));
          }
      }
  
      /**
       * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
       * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
       * targeting contracts.
       *
       * Reverts if the returned value is other than `true`.
       */
      function transferFromAndCallRelaxed(
          IERC1363 token,
          address from,
          address to,
          uint256 value,
          bytes memory data
      ) internal {
          if (to.code.length == 0) {
              safeTransferFrom(token, from, to, value);
          } else if (!token.transferFromAndCall(from, to, value, data)) {
              revert SafeERC20FailedOperation(address(token));
          }
      }
  
      /**
       * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
       * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
       * targeting contracts.
       *
       * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
       * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
       * once without retrying, and relies on the returned value to be true.
       *
       * Reverts if the returned value is other than `true`.
       */
      function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
          if (to.code.length == 0) {
              forceApprove(token, to, value);
          } else if (!token.approveAndCall(to, value, data)) {
              revert SafeERC20FailedOperation(address(token));
          }
      }
  
      /**
       * @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(IERC20 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);
          if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
              revert SafeERC20FailedOperation(address(token));
          }
      }
  
      /**
       * @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).
       *
       * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
       */
      function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
          // 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 cannot use {Address-functionCall} here since this should return false
          // and not revert is the subcall reverts.
  
          (bool success, bytes memory returndata) = address(token).call(data);
          return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0;
      }
  }
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @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 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) {
          return msg.sender;
      }
  
      function _msgData() internal view virtual returns (bytes calldata) {
          return msg.data;
      }
  
      function _contextSuffixLength() internal view virtual returns (uint256) {
          return 0;
      }
  }
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
  
  pragma solidity ^0.8.20;
  
  
  /**
   * @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.
   *
   * The initial owner is set to the address provided by the deployer. 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;
  
      /**
       * @dev The caller account is not authorized to perform an operation.
       */
      error OwnableUnauthorizedAccount(address account);
  
      /**
       * @dev The owner is not a valid owner account. (eg. `address(0)`)
       */
      error OwnableInvalidOwner(address owner);
  
      event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
  
      /**
       * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
       */
      constructor(address initialOwner) {
          if (initialOwner == address(0)) {
              revert OwnableInvalidOwner(address(0));
          }
          _transferOwnership(initialOwner);
      }
  
      /**
       * @dev Throws if called by any account other than the owner.
       */
      modifier onlyOwner() {
          _checkOwner();
          _;
      }
  
      /**
       * @dev Returns the address of the current owner.
       */
      function owner() public view virtual returns (address) {
          return _owner;
      }
  
      /**
       * @dev Throws if the sender is not the owner.
       */
      function _checkOwner() internal view virtual {
          if (owner() != _msgSender()) {
              revert OwnableUnauthorizedAccount(_msgSender());
          }
      }
  
      /**
       * @dev Leaves the contract without owner. It will not be possible to call
       * `onlyOwner` functions. Can only be called by the current owner.
       *
       * NOTE: Renouncing ownership will leave the contract without an owner,
       * thereby disabling any functionality that is only available to the owner.
       */
      function renounceOwnership() public virtual onlyOwner {
          _transferOwnership(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 {
          if (newOwner == address(0)) {
              revert OwnableInvalidOwner(address(0));
          }
          _transferOwnership(newOwner);
      }
  
      /**
       * @dev Transfers ownership of the contract to a new account (`newOwner`).
       * Internal function without access restriction.
       */
      function _transferOwnership(address newOwner) internal virtual {
          address oldOwner = _owner;
          _owner = newOwner;
          emit OwnershipTransferred(oldOwner, newOwner);
      }
  }
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v4.9/contracts/security/ReentrancyGuard.sol
  
  
  // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
  
  pragma solidity ^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() {
          _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 making it call a
       * `private` function that does the actual work.
       */
      modifier nonReentrant() {
          _nonReentrantBefore();
          _;
          _nonReentrantAfter();
      }
  
      function _nonReentrantBefore() private {
          // On the first call to nonReentrant, _status will be _NOT_ENTERED
          require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
  
          // Any calls to nonReentrant after this point will fail
          _status = _ENTERED;
      }
  
      function _nonReentrantAfter() private {
          // By storing the original value once again, a refund is triggered (see
          // https://eips.ethereum.org/EIPS/eip-2200)
          _status = _NOT_ENTERED;
      }
  
      /**
       * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
       * `nonReentrant` function in the call stack.
       */
      function _reentrancyGuardEntered() internal view returns (bool) {
          return _status == _ENTERED;
      }
  }
  
  // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v4.9/contracts/utils/Counters.sol
  
  
  // OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
  
  pragma solidity ^0.8.0;
  
  /**
   * @title Counters
   * @author Matt Condon (@shrugs)
   * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
   * of elements in a mapping, issuing ERC721 ids, or counting request ids.
   *
   * Include with `using Counters for Counters.Counter;`
   */
  library Counters {
      struct Counter {
          // This variable should never be directly accessed by users of the library: interactions must be restricted to
          // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
          // this feature: see https://github.com/ethereum/solidity/issues/4637
          uint256 _value; // default: 0
      }
  
      function current(Counter storage counter) internal view returns (uint256) {
          return counter._value;
      }
  
      function increment(Counter storage counter) internal {
          unchecked {
              counter._value += 1;
          }
      }
  
      function decrement(Counter storage counter) internal {
          uint256 value = counter._value;
          require(value > 0, "Counter: decrement overflow");
          unchecked {
              counter._value = value - 1;
          }
      }
  
      function reset(Counter storage counter) internal {
          counter._value = 0;
      }
  }
  
  // File: https://github.com/smartcontractkit/chainlink/blob/master/contracts/src/v0.8/shared/interfaces/AggregatorV3Interface.sol
  
  
  pragma solidity ^0.8.0;
  
  interface AggregatorV3Interface {
    function decimals() external view returns (uint8);
  
    function description() external view returns (string memory);
  
    function version() external view returns (uint256);
  
    function getRoundData(
      uint80 _roundId
    ) external view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
  
    function latestRoundData()
      external
      view
      returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
  }
  
  // File: remix-backup-at-20h47min-2023-8-30/.workspaces/default_workspace/Copy_scorp_eth_final.sol
  
  
  
  pragma solidity ^0.8.0;
  
  
  
  
  
  
  contract Scorpion is Ownable, ReentrancyGuard {
      AggregatorV3Interface internal priceFeed;
      address private priceAddress = 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419;
      using Counters for Counters.Counter;
      using SafeERC20 for IERC20;
      Counters.Counter public contributionId;
      IERC20 public usdtContract =
          IERC20(0xdAC17F958D2ee523a2206206994597C13D831ec7);
      address private scorpionAddress =
          0xAe0c040ef66E1e9a351B0cC5B2714027a646121d;
      uint256 public currentPrice = 100 ether;
      uint256 public totalContribution;
      uint256 private denoForTotal = 10**6;
      uint256 private deno = 1000;
      
      struct Contributors {
          uint256 contributorId;
          uint256 contributedAmount;
          address contributor;
          uint256 price;
          string code;
      }
  
      mapping(string => uint256) public coupon;
      mapping(string => uint256) public referral;
      mapping(address => uint256) public totalUserContribution;
      mapping(address => uint256) public totalUserTokens;
      mapping(address => uint256) public totalUserBonusTokens;
      mapping(address => uint256) public firstTransact;
      mapping(uint256 => Contributors) public contribution;
      constructor() Ownable(msg.sender) {
          priceFeed = AggregatorV3Interface(priceAddress);
      }
      event ContributeEvent(
          uint256 indexed contributeId,
          uint256 amount,
          address contributor,
          uint256 price,
          string code
      );
      function contribute(
          uint256 amountInUSD,
          string memory code,
          address _referredBy
      ) public payable {
          uint256 userTokens;
          uint256 refPart;
          uint256 scorpPart;
          uint256 _contributionId = contributionId.current();
          uint256 result;
          contributionId.increment();
          if (msg.value > 0) {
              result = msg.value * getLatestPrice();
              amountInUSD = result / 10**14;
              if (_referredBy != address(0)) {
                  refPart = (msg.value * referral[code]) / deno;
                  scorpPart = msg.value - refPart;
                  (bool success, ) = scorpionAddress.call{value: scorpPart}("");
                  require(success, "refund failed");
                  (bool successTransfer, ) = _referredBy.call{value: refPart}("");
                  require(successTransfer, "transfer failed");
              } else {
                  (bool success, ) = scorpionAddress.call{value: msg.value}("");
                  require(success, "refund failed");
              }
          } else {
              require(
                  usdtContract.allowance(msg.sender, address(this)) >=
                      amountInUSD,
                  "ERC20: Must add allowance to this contract first."
              );
              if (_referredBy != address(0)) {
                  refPart = (amountInUSD * referral[code]) / deno;
                  scorpPart = amountInUSD - refPart;
                  usdtContract.safeTransferFrom(
                      msg.sender,
                      scorpionAddress,
                      scorpPart
                  );
                  usdtContract.safeTransferFrom(msg.sender, _referredBy, refPart);
              } else {
                  usdtContract.safeTransferFrom(
                      msg.sender,
                      scorpionAddress,
                      amountInUSD
                  );
              }
          }
  
          contribution[_contributionId] = Contributors(
              _contributionId,
              amountInUSD,
              msg.sender,
              currentPrice,
              code
          );
  
          if (totalUserContribution[msg.sender] == 0)
              firstTransact[msg.sender] = block.timestamp;
          totalUserContribution[msg.sender] += amountInUSD;
          totalContribution += amountInUSD;
          uint256 fixedAmount = amountInUSD / 10**4;
          userTokens = (fixedAmount * currentPrice) / 10**2;
          if (coupon[code] != 0) {
              totalUserBonusTokens[msg.sender] +=
                  (userTokens * coupon[code]) /
                  deno;
          }
          totalUserTokens[msg.sender] += userTokens;
          emit ContributeEvent(
              _contributionId,
              amountInUSD,
              msg.sender,
              currentPrice,
              code
          );
      }
      function getLatestPrice() public view returns (uint256) {
          (, int256 price, , uint256 timeStamp, ) = priceFeed.latestRoundData();
          // If the round is not complete yet, timestamp is 0
          require(timeStamp > 0, "Round not complete");
          return (uint256)(price) / 10**6;
      }
      function updateCurrentPrice(uint256 price) public onlyOwner {
          currentPrice = price;
      }
      function addCode(string memory code, uint256 value) public onlyOwner {
          coupon[code] = value;
      }
      function addReferral(string memory code, uint256 value) public onlyOwner {
          referral[code] = value;
      }
      function getUserBonusTokens(address _userAddress)
          public
          view
          returns (uint256)
      {
          return totalUserBonusTokens[_userAddress];
      }
      function getUserTokens(address _userAddress) public view returns (uint256) {
          return totalUserTokens[_userAddress];
      }
      function getUserContribiton(address _userAddress)
          public
          view
          returns (uint256)
      {
          return totalUserContribution[_userAddress];
      }
      function getUserFirstTransact(address _userAddress)
          public
          view
          returns (uint256)
      {
          return firstTransact[_userAddress];
      }
      function getTotalContribution() public view returns (uint256) {
          return totalContribution;
      }
      function getTotalParticipants() public view returns (uint256) {
          return contributionId.current();
      }
      fallback() external payable {}
      receive() external payable {}
  }