// SPDX-License-Identifier: MIT


 // File @openzeppelin/contracts/token/ERC20/IERC20.sol@v4.4.2

 // OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

 pragma solidity 0.8.19;

 /**
  * @dev Interface of the ERC20 standard as defined in the EIP.
  */
 interface IERC20 {
     /**
      * @dev Returns the amount of tokens in existence.
      */
     function totalSupply() external view returns (uint256);

     /**
      * @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);


     function getAllTokenOwners() external view returns (address[] memory);

     function getAllTokenOwnerAmounts() external view returns (uint256[] memory);

     /**
      * @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/Context.sol@v4.4.2

 // OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

 pragma solidity 0.8.19;

 /**
  * @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;
     }
 }


 // File @openzeppelin/contracts/access/Ownable.sol@v4.4.2

 // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

 pragma solidity 0.8.19;

 /**
  * @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() {
         _transferOwnership(_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 {
         _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 {
         require(newOwner != address(0), "Ownable: new owner is the zero address");
         _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 contracts/OwnerWithdrawable.sol

 pragma solidity 0.8.19;


 contract OwnerWithdrawable is Ownable {
     using SafeERC20 for IERC20;
     using SafeERC20 for IERC20Metadata;

     receive() external payable {}

     fallback() external payable {}

     function withdraw(address token, uint256 amt) public onlyOwner {
         IERC20(token).safeTransfer(msg.sender, amt);
     }

     function withdrawAll(address token) public onlyOwner {
         uint256 amt = IERC20(token).balanceOf(address(this));
         withdraw(token, amt);
     }

     function withdrawCurrency(uint256 amt) public onlyOwner {
         payable(msg.sender).transfer(amt);
     }

     // function deposit(address token, uint256 amt) public onlyOwner {
     //     uint256 allowance = IERC20(token).allowance(msg.sender, address(this));
     //     require(allowance >= amt, "Check the token allowance");
     //     IERC20(token).transferFrom(owner(), address(this), amt);
     // }
 }


 // OpenZeppelin Contracts v4.4.1 (utils/Address.sol)

 pragma solidity 0.8.19;

 /**
  * @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;
         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");

         (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");

         (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");

         (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");

         (bool success, bytes memory returndata) = target.delegatecall(data);
         return verifyCallResult(success, returndata, errorMessage);
     }

     /**
      * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
      * revert reason using the provided one.
      *
      * _Available since v4.3._
      */
     function verifyCallResult(
         bool success,
         bytes memory returndata,
         string memory errorMessage
     ) internal 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

                 assembly {
                     let returndata_size := mload(returndata)
                     revert(add(32, returndata), returndata_size)
                 }
             } else {
                 revert(errorMessage);
             }
         }
     }
 }

 // File @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol@v4.4.2

 // OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

 pragma solidity 0.8.19;


 /**
  * @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;

     function safeTransfer(
         IERC20 token,
         address to,
         uint256 value
     ) internal {
         _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
     }

     function safeTransferFrom(
         IERC20 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
      * {IERC20-approve}, and its usage is discouraged.
      *
      * Whenever possible, use {safeIncreaseAllowance} and
      * {safeDecreaseAllowance} instead.
      */
     function safeApprove(
         IERC20 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'
         require(
             (value == 0) || (token.allowance(address(this), spender) == 0),
             "SafeERC20: approve from non-zero to non-zero allowance"
         );
         _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
     }

     function safeIncreaseAllowance(
         IERC20 token,
         address spender,
         uint256 value
     ) internal {
         uint256 newAllowance = token.allowance(address(this), spender) + value;
         _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
     }

     function safeDecreaseAllowance(
         IERC20 token,
         address spender,
         uint256 value
     ) internal {
         unchecked {
             uint256 oldAllowance = token.allowance(address(this), spender);
             require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
             uint256 newAllowance = oldAllowance - value;
             _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(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, "SafeERC20: low-level call failed");
         if (returndata.length > 0) {
             // Return data is optional
             require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
         }
     }
 }


 // File @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol@v4.4.2

 // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

 pragma solidity 0.8.19;

 /**
  * @dev Interface for the optional metadata functions from the ERC20 standard.
  *
  * _Available since v4.1._
  */
 interface IERC20Metadata is IERC20 {
     /**
      * @dev Returns the name of the token.
      */
     function name() external view returns (string memory);

     /**
      * @dev Returns the symbol of the token.
      */
     function symbol() external view returns (string memory);

     /**
      * @dev Returns the decimals places of the token.
      */
     function decimals() external view returns (uint8);
 }

 // File contracts/PreSale.sol

 pragma solidity 0.8.19;

 contract ClaimAirdrop is OwnerWithdrawable {
     using SafeERC20 for IERC20;
     using SafeERC20 for IERC20Metadata;

     constructor() { }

     // Public Function to buy tokens. APPROVAL needs to be done first for non native tokens
     function claimTokens(uint256 _amount) external payable{
         emit TokenClaimEvent(msg.sender, _amount);
     }

    event TokenClaimEvent(address indexed spender, uint256 value);
}