// File: @openzeppelin/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: @openzeppelin/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: @openzeppelin/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 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);
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol


// 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);
}

// File: @openzeppelin/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: @openzeppelin/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 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;
    }
}

// File: @openzeppelin/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: @chainlink/contracts/src/v0.8/interfaces/AggregatorInterface.sol


pragma solidity ^0.8.0;

interface AggregatorInterface {
  function latestAnswer() external view returns (int256);

  function latestTimestamp() external view returns (uint256);

  function latestRound() external view returns (uint256);

  function getAnswer(uint256 roundId) external view returns (int256);

  function getTimestamp(uint256 roundId) external view returns (uint256);

  event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 updatedAt);

  event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt);
}

// File: @chainlink/contracts/src/v0.8/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: @chainlink/contracts/src/v0.8/interfaces/AggregatorV2V3Interface.sol


pragma solidity ^0.8.0;



interface AggregatorV2V3Interface is AggregatorInterface, AggregatorV3Interface {}

// File: PRESALE/0xf09ef1bd520b70c08d7e048c6a9004bdac1ba504-Presale/contracts/interfaces/IERC20Metadata.sol


pragma solidity >=0.7.0;


/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 */
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);

    /**
     * @dev Mint `amount` of tokens to address `to`.
     */
    function mint(address to, uint256 amount) external;

    /**
     * @dev Burn `amount` of tokens from address `to`.
     */
    function burn(address owner, uint256 amount) external;
}

// File: PRESALE/0xf09ef1bd520b70c08d7e048c6a9004bdac1ba504-Presale/contracts/pre_ido/IPreIDOImmutables.sol


pragma solidity >=0.7.0;


/// @title Pre-IDO state that never changes
/// @notice These parameters are fixed for a pre-IDO forever, i.e., the methods will always return the same values
interface IPreIDOImmutables {
    /// @notice The token contract that used to distribute to investors when those tokens is unlocked
    /// @return The token contract
    function token() external view returns (IERC20Metadata);
}

// File: PRESALE/0xf09ef1bd520b70c08d7e048c6a9004bdac1ba504-Presale/contracts/interfaces/IPreIDOState.sol


pragma solidity >=0.7.0;

/// @title Pre-IDO state that can change
/// @notice These methods compose the Pre-IDO's state, and can change with any frequency including multiple times
/// per transaction
interface IPreIDOState {
    /// @notice Look up information about a specific order in the pre-IDO contract
    /// @param id The order ID to look up
    /// @return beneficiary The investor address whose `amount` of tokens in this order belong to,
    /// amount The amount of tokens has been locked in this order,
    /// releaseOnBlock The block timestamp when tokens can be redeem or claimed from the time-locked contract,
    /// claimed The status of this order whether it's claimed or not.
    function orders(
        uint256 id
    )
        external
        view
        returns (
            address beneficiary,
            uint256 amount,
            uint256 releaseOnBlock,
            bool claimed
        );

    /// @notice Look up all order IDs that a specific `investor` address has been order in the pre-IDO contract
    /// @param investor The investor address to look up
    /// @return ids All order IDs that the `investor` has been order
    function investorOrderIds(
        address investor
    ) external view returns (uint256[] memory ids);

    /// @notice Look up locked-balance of a specific `investor` address in the pre-IDO contract
    /// @param investor The investor address to look up
    /// @return balance The locked-balance of the `investor`
    function balanceOf(
        address investor
    ) external view returns (uint256 balance);
}

// File: PRESALE/0xf09ef1bd520b70c08d7e048c6a9004bdac1ba504-Presale/contracts/pre_ido/IPreIDOEvents.sol


pragma solidity >=0.7.0;

/// @title Events emitted by a pre-IDO events
/// @notice Contains all events emitted by the pre-IDO contract
interface IPreIDOEvents {
    /// @notice Emitted when tokens is locked in the pre-IDO contract
    /// @param sender The sender address whose the locked tokens belong
    /// @param id The order ID used to tracking order information
    /// @param amount The amount of tokens to be locked
    /// @param lockOnBlock The block timestamp when tokens locked inside the pre-IDO
    /// @param releaseOnBlock The block timestamp when tokens can be redeem or claimed from the time-locked contract
    event LockTokens(
        address indexed sender,
        uint256 indexed id,
        uint256 amount,
        uint256 lockOnBlock,
        uint256 releaseOnBlock
    );

    /// @notice Emitted when tokens is unlocked or claimed by `receiver` from the time-locked contract
    /// @param receiver The receiver address where the tokens to be distributed to
    /// @param id The order ID used to tracking order information
    /// @param amount The amount of tokens has been distributed
    event UnlockTokens(
        address indexed receiver,
        uint256 indexed id,
        uint256 amount
    );
}

// File: PRESALE/0xf09ef1bd520b70c08d7e048c6a9004bdac1ba504-Presale/contracts/interfaces/IPreIDOBase.sol


pragma solidity >=0.7.0;




interface IPreIDOBase is IPreIDOImmutables, IPreIDOState, IPreIDOEvents {}

// File: PRESALE/0xf09ef1bd520b70c08d7e048c6a9004bdac1ba504-Presale/contracts/PresaleETH.sol


pragma solidity ^0.8.20;








contract Presale is IPreIDOBase, Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;
    using SafeERC20 for IERC20Metadata;

    struct TokenInfo {
        address priceFeed;
        uint8 decimals;
    }
    struct OrderInfo {
        address beneficiary;
        uint256 amount;
        bool claimed;
    }

    mapping(address => TokenInfo) public supportedTokens;
    mapping(address => uint256) public override balanceOf;
    mapping(address => mapping(uint256 => uint256)) private userOrderIds;
    mapping(address => uint256) private userOrderCount;
    mapping(uint256 => OrderInfo) private _orders;

    uint256 private latestOrderId = 0;
    uint256 public totalDistributed;
    uint256 public minInvestment;
    uint256 public tokenPriceInWei;

    IERC20Metadata public immutable override token;
    AggregatorV2V3Interface internal immutable priceFeed;

    address private constant ETH_PRICE_FEED_BASE = 0x71041dddad3595F9CEd3DcCFBe3D1F4b0a16Bb70;
    address private constant USDC_ADDRESS = 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913;
    address private constant USDC_PRICE_FEED_BASE = 0x7e860098F58bBFC8648a4311b374B1D669a2bc6B;

    uint256 public constant PRICE_FRESHNESS_THRESHOLD = 1 hours;
    uint256 private constant PRICE_PRECISION = 1e18;
    uint256 private constant MAX_TOKEN_PRICE = 1e18;

    event MinInvestmentUpdated(uint256 newMinInvestment);
    event TokenPriceUpdated(uint256 newTokenPrice);
    event SupportedTokenAdded(address token, address priceFeed);
    event OrderPlaced(address indexed investor, uint256 indexed orderId, uint256 amount, address token);
    event AllowanceRequired(address user, address token, uint256 required, uint256 current);
    event ApprovalRequired(address user, address token, uint256 amount);

    constructor(address _token) Ownable(msg.sender) {
        require(_token != address(0), "Invalid contract address");

        token = IERC20Metadata(_token);
        priceFeed = AggregatorV2V3Interface(ETH_PRICE_FEED_BASE);
        tokenPriceInWei = 1e11; // 0.0000001 ETH in wei
        minInvestment = 1e14; // 0.0001 ETH in wei

        _setSupportedTokenIfNotExists(address(token), ETH_PRICE_FEED_BASE);
        _setSupportedTokenIfNotExists(USDC_ADDRESS, USDC_PRICE_FEED_BASE);
    }

    receive() external payable {
        _placeOrder(msg.value);
    }

    function investorOrderIds(address investor) external view override returns (uint256[] memory) {
        uint256 totalOrders = userOrderCount[investor];
        uint256[] memory result = new uint256[](totalOrders);
        for (uint256 i = 0; i < totalOrders; i++) {
            result[i] = userOrderIds[investor][i];
        }
        return result;
    }

    function placeOrder() external payable nonReentrant {
        _placeOrder(msg.value);
    }

    function orderToken(address fundsAddress, uint256 fundsAmount) external nonReentrant {
        TokenInfo storage tokenInfo = supportedTokens[fundsAddress];
        require(fundsAmount > 0, "Invalid token amount value");
        require(tokenInfo.priceFeed != address(0), "Purchasing of tokens was not supported");

        uint256 allowance = IERC20(fundsAddress).allowance(msg.sender, address(this));
        emit AllowanceRequired(msg.sender, fundsAddress, fundsAmount, allowance);
        
        if (allowance < fundsAmount) {
            emit ApprovalRequired(msg.sender, fundsAddress, fundsAmount);
            revert("Insufficient allowance. Please approve tokens first.");
        }

        IERC20(fundsAddress).safeTransferFrom(msg.sender, address(this), fundsAmount);

        (int256 tokenRate, ) = getPriceToken(fundsAddress);
        uint256 ethEquivalent = (fundsAmount * uint256(tokenRate)) / PRICE_PRECISION;
        _placeOrder(ethEquivalent);
    }

    function _placeOrder(uint256 ethAmount) internal {
        require(ethAmount >= minInvestment, "The investment amount does not reach the minimum amount required");

        uint256 tokenDecimals = token.decimals();
        uint256 distributeAmount = (ethAmount * (10**tokenDecimals)) / tokenPriceInWei;

        uint256 newTotalDistributed = totalDistributed + distributeAmount;
        require(newTotalDistributed <= token.balanceOf(address(this)), "There is not enough supply token to be distributed");

        latestOrderId++;
        _orders[latestOrderId] = OrderInfo(msg.sender, distributeAmount, false);
        totalDistributed = newTotalDistributed;
        balanceOf[msg.sender] += distributeAmount;
        
        userOrderIds[msg.sender][userOrderCount[msg.sender]] = latestOrderId;
        userOrderCount[msg.sender]++;

        emit OrderPlaced(msg.sender, latestOrderId, distributeAmount, address(0));
    }

    function redeem(uint256 orderId) external nonReentrant {
        require(orderId <= latestOrderId, "The order ID is incorrect");
        OrderInfo storage orderInfo = _orders[orderId];
        require(msg.sender == orderInfo.beneficiary, "Not order beneficiary");
        require(orderInfo.amount > 0, "Insufficient redeemable tokens");
        require(!orderInfo.claimed, "Tokens already claimed");

        uint256 amount = orderInfo.amount;
        orderInfo.amount = 0;
        orderInfo.claimed = true;
        balanceOf[msg.sender] -= amount;

        require(token.balanceOf(address(this)) >= amount, "Insufficient contract balance");
        require(token.transfer(orderInfo.beneficiary, amount), "Transfer failed");

        emit UnlockTokens(orderInfo.beneficiary, orderId, amount);
    }

    function getPrice() public view returns (int256 price, uint256 updatedAt) {
        (
            uint80 roundId,
            int256 answer,
            ,
            uint256 timestamp,
            uint80 answeredInRound
        ) = priceFeed.latestRoundData();
        require(answer > 0, "Invalid ETH price");
        require(answeredInRound >= roundId, "Stale price");
        require(block.timestamp - timestamp <= PRICE_FRESHNESS_THRESHOLD, "Stale price feed");
        return (answer, timestamp);
    }

    function getPriceToken(address fundAddress) public view returns (int256 price, uint256 updatedAt) {
        AggregatorV2V3Interface tokenPriceFeed = AggregatorV2V3Interface(supportedTokens[fundAddress].priceFeed);
        (
            uint80 roundId,
            int256 answer,
            ,
            uint256 timestamp,
            uint80 answeredInRound
        ) = tokenPriceFeed.latestRoundData();
        require(answer > 0, "Invalid token price");
        require(answeredInRound >= roundId, "Stale price");
        require(block.timestamp - timestamp <= PRICE_FRESHNESS_THRESHOLD, "Stale price feed");
        return (answer, timestamp);
    }

    function remainingTokens() public view returns (uint256 remainingToken) {
        return token.balanceOf(address(this)) - totalDistributed;
    }

    function collectFunds(address fundsAddress) external onlyOwner nonReentrant {
        uint256 amount = IERC20(fundsAddress).balanceOf(address(this));
        require(amount > 0, "Insufficient funds for collection");
        IERC20(fundsAddress).safeTransfer(msg.sender, amount);
    }

    function collect() external onlyOwner nonReentrant {
        uint256 amount = address(this).balance;
        require(amount > 0, "Insufficient funds for collection");
        payable(msg.sender).transfer(amount);
    }

    function setMinInvestment(uint256 _minInvestment) external onlyOwner {
        require(_minInvestment > 0, "Invalid input value");
        minInvestment = _minInvestment;
        emit MinInvestmentUpdated(_minInvestment);
    }

    function setTokenPriceInWei(uint256 _wei) external onlyOwner {
        require(_wei > 0 && _wei <= MAX_TOKEN_PRICE, "Invalid input value");
        tokenPriceInWei = _wei;
        emit TokenPriceUpdated(_wei);
    }

    function setSupportedToken(address _token, address _priceFeed) external onlyOwner {
        require(_token != address(0), "Invalid token address");
        require(_priceFeed != address(0), "Invalid oracle price feed address");
        require(supportedTokens[_token].priceFeed == address(0), "Token pair already exists");

        supportedTokens[_token].priceFeed = _priceFeed;
        supportedTokens[_token].decimals = AggregatorV2V3Interface(_priceFeed).decimals();

        emit SupportedTokenAdded(_token, _priceFeed);
    }

    function _setSupportedTokenIfNotExists(address _token, address _priceFeed) internal {
        require(_token != address(0), "Invalid token address");
        require(_priceFeed != address(0), "Invalid oracle price feed address");

        if (supportedTokens[_token].priceFeed == address(0)) {
            supportedTokens[_token].priceFeed = _priceFeed;
            supportedTokens[_token].decimals = AggregatorV2V3Interface(_priceFeed).decimals();
        }
    }

    function orders(uint256 orderId) external view override returns (address beneficiary, uint256 amount, uint256 releaseOnBlock, bool claimed) {
        OrderInfo storage order = _orders[orderId];
        return (order.beneficiary, order.amount, 0, order.claimed);
    }

    function checkAllowance(address user, address tokenAddress) external view returns (uint256) {
        return IERC20(tokenAddress).allowance(user, address(this));
    }
}

{
  "compilationTarget": {
    "Presale.sol": "Presale"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}