creation_sourcecode: // The following code is from flattening this file: GreenGamesStaking.sol
  // : None
  pragma solidity ^0.8.24;
  
  // The following code is from flattening this import statement in: GreenGamesStaking.sol
  // import "@openzeppelin/contracts/access/Ownable.sol";
  // The following code is from flattening this file: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/access/Ownable.sol
  // : MIT
  // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
  
  pragma solidity ^0.8.20;
  
  // The following code is from flattening this import statement in: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/access/Ownable.sol
  // import {Context} from "../utils/Context.sol";
  // The following code is from flattening this file: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/utils/Context.sol
  // : MIT
  // 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;
      }
  }
  
  
  /**
   * @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);
      }
  }
  
  // The following code is from flattening this import statement in: GreenGamesStaking.sol
  // import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
  // The following code is from flattening this file: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
  // : MIT
  // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)
  
  pragma solidity ^0.8.20;
  
  // The following code is from flattening this import statement in: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
  // import {IERC20} from "../IERC20.sol";
  // The following code is from flattening this file: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol
  // : MIT
  // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @dev Interface of the ERC20 standard as defined in the EIP.
   */
  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);
  }
  
  // The following code is from flattening this import statement in: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
  // import {IERC20Permit} from "../extensions/IERC20Permit.sol";
  // The following code is from flattening this file: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol
  // : MIT
  // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
   * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
   *
   * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
   * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
   * need to send a transaction, and thus is not required to hold Ether at all.
   *
   * ==== Security Considerations
   *
   * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
   * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
   * considered as an intention to spend the allowance in any specific way. The second is that because permits have
   * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
   * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
   * generally recommended is:
   *
   * ```solidity
   * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
   *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
   *     doThing(..., value);
   * }
   *
   * function doThing(..., uint256 value) public {
   *     token.safeTransferFrom(msg.sender, address(this), value);
   *     ...
   * }
   * ```
   *
   * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
   * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
   * {SafeERC20-safeTransferFrom}).
   *
   * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
   * contracts should have entry points that don't rely on permit.
   */
  interface IERC20Permit {
      /**
       * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
       * given ``owner``'s signed approval.
       *
       * IMPORTANT: The same issues {IERC20-approve} has related to transaction
       * ordering also apply here.
       *
       * Emits an {Approval} event.
       *
       * Requirements:
       *
       * - `spender` cannot be the zero address.
       * - `deadline` must be a timestamp in the future.
       * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
       * over the EIP712-formatted function arguments.
       * - the signature must use ``owner``'s current nonce (see {nonces}).
       *
       * For more information on the signature format, see the
       * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
       * section].
       *
       * CAUTION: See Security Considerations above.
       */
      function permit(
          address owner,
          address spender,
          uint256 value,
          uint256 deadline,
          uint8 v,
          bytes32 r,
          bytes32 s
      ) external;
  
      /**
       * @dev Returns the current nonce for `owner`. This value must be
       * included whenever a signature is generated for {permit}.
       *
       * Every successful call to {permit} increases ``owner``'s nonce by one. This
       * prevents a signature from being used multiple times.
       */
      function nonces(address owner) external view returns (uint256);
  
      /**
       * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
       */
      // solhint-disable-next-line func-name-mixedcase
      function DOMAIN_SEPARATOR() external view returns (bytes32);
  }
  
  // The following code is from flattening this import statement in: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
  // import {Address} from "../../../utils/Address.sol";
  // The following code is from flattening this file: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/utils/Address.sol
  // : MIT
  // 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();
          }
      }
  }
  
  
  /**
   * @title SafeERC20
   * @dev Wrappers around ERC20 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 ERC20 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 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;
      }
  }
  
  // The following code is from flattening this import statement in: GreenGamesStaking.sol
  // import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
  // The following code is from flattening this file: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/token/ERC1155/IERC1155.sol
  // : MIT
  // OpenZeppelin Contracts (last updated v5.0.1) (token/ERC1155/IERC1155.sol)
  
  pragma solidity ^0.8.20;
  
  // The following code is from flattening this import statement in: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/token/ERC1155/IERC1155.sol
  // import {IERC165} from "../../utils/introspection/IERC165.sol";
  // The following code is from flattening this file: /Users/owenraman/Documents/GitHub/GreenGamesStaking/node_modules/@openzeppelin/contracts/utils/introspection/IERC165.sol
  // : MIT
  // OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @dev Interface of the ERC165 standard, as defined in the
   * https://eips.ethereum.org/EIPS/eip-165[EIP].
   *
   * 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[EIP 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);
  }
  
  
  /**
   * @dev Required interface of an ERC1155 compliant contract, as defined in the
   * https://eips.ethereum.org/EIPS/eip-1155[EIP].
   */
  interface IERC1155 is IERC165 {
      /**
       * @dev Emitted when `value` amount of tokens of type `id` are transferred from `from` to `to` by `operator`.
       */
      event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
  
      /**
       * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
       * transfers.
       */
      event TransferBatch(
          address indexed operator,
          address indexed from,
          address indexed to,
          uint256[] ids,
          uint256[] values
      );
  
      /**
       * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
       * `approved`.
       */
      event ApprovalForAll(address indexed account, address indexed operator, bool approved);
  
      /**
       * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
       *
       * If an {URI} event was emitted for `id`, the standard
       * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
       * returned by {IERC1155MetadataURI-uri}.
       */
      event URI(string value, uint256 indexed id);
  
      /**
       * @dev Returns the value of tokens of token type `id` owned by `account`.
       *
       * Requirements:
       *
       * - `account` cannot be the zero address.
       */
      function balanceOf(address account, uint256 id) external view returns (uint256);
  
      /**
       * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
       *
       * Requirements:
       *
       * - `accounts` and `ids` must have the same length.
       */
      function balanceOfBatch(
          address[] calldata accounts,
          uint256[] calldata ids
      ) external view returns (uint256[] memory);
  
      /**
       * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
       *
       * Emits an {ApprovalForAll} event.
       *
       * Requirements:
       *
       * - `operator` cannot be the caller.
       */
      function setApprovalForAll(address operator, bool approved) external;
  
      /**
       * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
       *
       * See {setApprovalForAll}.
       */
      function isApprovedForAll(address account, address operator) external view returns (bool);
  
      /**
       * @dev Transfers a `value` amount of tokens of type `id` from `from` to `to`.
       *
       * WARNING: This function can potentially allow a reentrancy attack when transferring tokens
       * to an untrusted contract, when invoking {onERC1155Received} on the receiver.
       * Ensure to follow the checks-effects-interactions pattern and consider employing
       * reentrancy guards when interacting with untrusted contracts.
       *
       * Emits a {TransferSingle} event.
       *
       * Requirements:
       *
       * - `to` cannot be the zero address.
       * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
       * - `from` must have a balance of tokens of type `id` of at least `value` amount.
       * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
       * acceptance magic value.
       */
      function safeTransferFrom(address from, address to, uint256 id, uint256 value, bytes calldata data) external;
  
      /**
       * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
       *
       * WARNING: This function can potentially allow a reentrancy attack when transferring tokens
       * to an untrusted contract, when invoking {onERC1155BatchReceived} on the receiver.
       * Ensure to follow the checks-effects-interactions pattern and consider employing
       * reentrancy guards when interacting with untrusted contracts.
       *
       * Emits either a {TransferSingle} or a {TransferBatch} event, depending on the length of the array arguments.
       *
       * Requirements:
       *
       * - `ids` and `values` must have the same length.
       * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
       * acceptance magic value.
       */
      function safeBatchTransferFrom(
          address from,
          address to,
          uint256[] calldata ids,
          uint256[] calldata values,
          bytes calldata data
      ) external;
  }
  
  
  interface IUniswapV2Router02 {
      function WETH() external pure returns (address);
      function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
  }
  
  error InsufficientBalance();
  error InvalidDeposit();
  
  contract GreenGamesStaking is Ownable {
      using SafeERC20 for IERC20;
  
      struct Stake {
          uint256 pid;
          uint256 amount;
          uint256 value;
          uint256 rewardDebt;
          uint256 initialRewardDebt;
          uint256 startTime;
          uint256 lastClaimTimestamp; //for tickets
      }
  
      IERC20 public bets;
      IERC1155 public nft;
      address public constant usdt = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
  
      struct Pool {
          uint256 totalStaked;
          uint256 usdtPerSecond;
          uint256 accUSDTPerShare;
          uint256 lastRewardTimestamp;
          uint256 rewardSupply;
          uint256 allocationPercent;
      }
  
      struct User {
          Stake[] stakes;
          uint256 ticketsEarned;
          bool isWhitelisted;
      }
  
      uint256 public totalStakers;
  
      mapping(address => User) public users;
      mapping(uint256 => Pool) public pools;
  
      event DepositBETTED(address user, uint256 amount);
      event DepositNFT(address user, uint256 amount);
      event ClaimRewards(address user, uint256 amount);
      event WithdrawBETTED(address user, uint256 amount);
      event WithdrawNFT(address user, uint256 amount);
  
      constructor(IERC20 _bets, IERC1155 _nft, address[] memory whitelist) Ownable(msg.sender) {
          bets = _bets;
          nft = _nft;
  
          pools[0] = Pool(0, 0, 0, block.timestamp, 0, 88);
          pools[1] = Pool(0, 0, 0, block.timestamp, 0, 6);
          pools[2] = Pool(0, 0, 0, block.timestamp, 0, 4);
          pools[3] = Pool(0, 0, 0, block.timestamp, 0, 2);
  
          _whitelistMany(whitelist);
      }
  
      function pendingUSDT(address _user) external view returns (uint256) {
          Stake[] storage stakes = users[_user].stakes;
  
          uint256 pending;
  
          uint256 len = stakes.length;
          for (uint256 i = 0; i < len; i++) {
              Stake storage userStake = stakes[i];
              Pool storage pool = pools[userStake.pid];
              
              uint256 usdtReward = ((block.timestamp - pool.lastRewardTimestamp) * pool.usdtPerSecond);
              usdtReward = usdtReward > pool.rewardSupply ? pool.rewardSupply : usdtReward;
  
              uint256 accUSDTPerShare = pool.accUSDTPerShare + (usdtReward * 1e36 / pool.totalStaked);
              
              pending += (userStake.amount * accUSDTPerShare / 1e36) - userStake.rewardDebt;
          }
  
          uint256 usdtBalance = IERC20(usdt).balanceOf(address(this));
          uint256 amountToSend = pending > usdtBalance ? usdtBalance : pending;
          return amountToSend;
      }
  
      function pendingUSDT(address _user, uint256 _id) external view returns (uint256) {
          Stake storage stake = users[_user].stakes[_id];
          Pool storage pool = pools[stake.pid];
          
          uint256 usdtReward = ((block.timestamp - pool.lastRewardTimestamp) * pool.usdtPerSecond);
          usdtReward = usdtReward > pool.rewardSupply ? pool.rewardSupply : usdtReward;
  
          uint256 accUSDTPerShare = pool.accUSDTPerShare + (usdtReward * 1e36 / pool.totalStaked);
          
          uint256 pending = (stake.amount * accUSDTPerShare / 1e36) - stake.rewardDebt;
  
          uint256 usdtBalance = IERC20(usdt).balanceOf(address(this));
          uint256 amountToSend = pending > usdtBalance ? usdtBalance : pending;
          return amountToSend;
      }
  
      function pendingTickets(address _user) external view returns (uint256) {
          User storage user = users[_user];
  
          uint256 pendingTickets;
  
          uint256 len = user.stakes.length;
          for (uint256 i = 0; i < len; i++) {
              Stake storage stake = user.stakes[i];
  
              if (stake.pid == 0) {
                  pendingTickets += (((block.timestamp - stake.lastClaimTimestamp) / 1 weeks) * stake.value * 5 / 1300);
              }
          }
  
          return user.ticketsEarned + pendingTickets;
      }
  
      function getValue(uint256 amount) public view returns (uint256) {
  
          IUniswapV2Router02 uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
  
          address[] memory path = new address[](3);
          path[0] = address(bets);
          path[1] = uniswapV2Router.WETH();
          path[2] = usdt;
  
          return uniswapV2Router.getAmountsOut(amount, path)[2];
      }
  
      function stake(uint256[] memory _pids, uint256[] memory _amounts) external {
          if (users[msg.sender].stakes.length == 0) {
              unchecked {++totalStakers;}
          }
          uint256 len = _pids.length;
          for (uint256 i = 0; i < len; i++) {
              _stake(_pids[i], _amounts[i]);
          }
      }
  
      function _stake(uint256 _pid, uint256 _amount) internal {
          if (_amount > 0) {
              _updatePool(_pid);
  
              User storage user = users[msg.sender];
              Pool storage pool = pools[_pid];
  
              user.stakes.push(Stake({
                                     pid: _pid,
                                     amount: _amount,
                                     value: _pid == 0 ? getValue(_amount) : 0,
                                     rewardDebt: _amount * pool.accUSDTPerShare / 1e36,
                                     initialRewardDebt: _amount * pool.accUSDTPerShare / 1e36,
                                     startTime: block.timestamp,
                                     lastClaimTimestamp: block.timestamp
                                    }));
              pool.totalStaked += _amount;
  
              if (_pid == 0) {
                  bets.safeTransferFrom(address(msg.sender), address(this), _amount);
                  emit DepositBETTED(msg.sender, _amount);
              } else if (user.isWhitelisted) {
                  nft.safeTransferFrom(msg.sender, address(this), _pid, _amount, "");
                  emit DepositNFT(msg.sender, _amount);
              } else {
                  revert InvalidDeposit();
              }
          }
      }
  
      function claimRewards() external {
          User storage user = users[msg.sender];
  
          uint256 pendingRewards;
          uint256 pendingTickets;
  
          uint256 len = user.stakes.length;
          for (uint256 i = 0; i < len; i++) {
              Stake storage stake = user.stakes[i];
              Pool storage pool = pools[stake.pid];
              _updatePool(stake.pid);
  
              pendingRewards += (stake.amount * pool.accUSDTPerShare / 1e36) - stake.rewardDebt;
              
              if (stake.pid == 0) {
                  uint256 numWeeks = (block.timestamp - stake.lastClaimTimestamp) / 1 weeks;
                  pendingTickets += (numWeeks * stake.value * 5 / 1300);
                  stake.lastClaimTimestamp += (numWeeks * 1 weeks);
              }
  
              stake.rewardDebt = stake.amount * pool.accUSDTPerShare / 1e36;
          }
  
          user.ticketsEarned += pendingTickets;
  
          uint256 usdtBalance = IERC20(usdt).balanceOf(address(this));
          uint256 amountToSend = pendingRewards > usdtBalance ? usdtBalance : pendingRewards;
          IERC20(usdt).transfer(msg.sender, amountToSend);
          emit ClaimRewards(msg.sender, pendingRewards);
  
      }
  
      function updatePool() external {
          for (uint256 _pid = 0; _pid < 4; _pid++) {
              _updatePool(_pid);
          }
      }
  
      function _updatePool(uint256 _pid) internal {
          Pool storage pool = pools[_pid];
          uint256 timestamp = block.timestamp;
          if (timestamp <= pool.lastRewardTimestamp) {
              return;
          }
          uint256 balance = pool.totalStaked;
          if (balance == 0) {
              pool.lastRewardTimestamp = timestamp;
              return;
          }
          uint256 usdtReward = ((timestamp - pool.lastRewardTimestamp) * pool.usdtPerSecond);
          usdtReward = usdtReward > pool.rewardSupply ? pool.rewardSupply : usdtReward;
  
          pool.accUSDTPerShare += (usdtReward * 1e36 / balance);
          pool.lastRewardTimestamp = timestamp;
          pool.rewardSupply -= usdtReward;
      }
  
      function unstake(uint256 id) external {
          User storage user = users[msg.sender];
          Stake storage stake = user.stakes[id];
  
          uint256 _pid = stake.pid;
          Pool storage pool = pools[_pid];
          _updatePool(_pid);
  
          uint256 pending = (stake.amount * pool.accUSDTPerShare / 1e36) - stake.rewardDebt;
          uint256 usdtBalance = IERC20(usdt).balanceOf(address(this));
          uint256 amountToSend = pending > usdtBalance ? usdtBalance : pending;
          IERC20(usdt).transfer(msg.sender, amountToSend);
  
          if (_pid == 0) {
              uint256 numWeeks = (block.timestamp - stake.lastClaimTimestamp) / 1 weeks;
              user.ticketsEarned += (numWeeks * stake.value * 5 / 1300);
              stake.lastClaimTimestamp += (numWeeks * 1 weeks);
  
              uint256 week = (block.timestamp - stake.startTime) / 1 weeks;
              uint256 finalAmount = week < 12 ? stake.amount * (75 + 2 * week) / 100 : stake.amount;
  
              bets.safeTransfer(address(msg.sender), finalAmount);
              bets.safeTransfer(owner(), stake.amount - finalAmount);
              emit WithdrawBETTED(msg.sender, finalAmount);
          } else {
              nft.safeTransferFrom(address(this), msg.sender, _pid, stake.amount, "");
              emit WithdrawNFT(msg.sender, stake.amount);
          }
  
          pool.totalStaked -= stake.amount;
          user.stakes[id] = user.stakes[user.stakes.length - 1];
          user.stakes.pop();
          if (user.stakes.length == 0) {
              unchecked{--totalStakers;}
          }
      }
  
      function supplyRewards(uint256 amount, uint256 duration) external onlyOwner {
          IERC20(usdt).safeTransferFrom(address(msg.sender), address(this), amount);
  
          uint256 amountUsed;
          for (uint i = 1; i < 4; i++) {
              _updatePool(i);
              Pool storage pool = pools[i];
              uint256 allocation = amount * pool.allocationPercent / 100;
              pool.rewardSupply += allocation;
              pool.usdtPerSecond = pool.rewardSupply / duration;
              amountUsed += allocation;
          }
  
          _updatePool(0);
          Pool storage pool = pools[0];
          pool.rewardSupply += (amount - amountUsed);
          pool.usdtPerSecond = pool.rewardSupply / duration;
  
      }
  
      function setWhitelisted(address account, bool value) external onlyOwner {
          users[account].isWhitelisted = value;
      }
  
      function whitelistMany(address[] memory accounts) external onlyOwner {
          _whitelistMany(accounts);
      }
  
      function _whitelistMany(address[] memory accounts) internal {
          uint256 len = accounts.length;
          for (uint256 i = 0; i < len; i++) {
              users[accounts[i]].isWhitelisted = true;
          }
      }
  
      function onERC1155Received(address, address, uint256, uint256, bytes memory) public virtual returns (bytes4) {
          return this.onERC1155Received.selector;
      }
  
      function getUser(address _user) external view returns (User memory) {
          return users[_user];
      }
  
      function getPool(uint256 pid) external view returns (Pool memory) {
          return pools[pid];
      }
  
  }