// 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);

  // getRoundData and latestRoundData should both raise "No data present"
  // if they do not have data to report, instead of returning unset values
  // which could be misinterpreted as actual reported values.
  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: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol


// OpenZeppelin Contracts (last updated v4.7.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     *
     * _Available since v4.7._
     */
    function verifyCalldata(
        bytes32[] calldata proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     *
     * _Available since v4.7._
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be proved to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * _Available since v4.7._
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * _Available since v4.7._
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and the sibling nodes in `proof`,
     * consuming from one or the other at each step according to the instructions given by
     * `proofFlags`.
     *
     * _Available since v4.7._
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}
     *
     * _Available since v4.7._
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol


// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @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 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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// File: @openzeppelin/contracts/utils/Context.sol


// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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


// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @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 {
        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: deploy.sol


pragma solidity 0.8.17;





/**
 * @title Private Sale ANTK
 *
 * @notice This contract is a pre sale contract
 *
 * @author https://antk.io
 *
 * @dev Buyers can buy only with ETH or USDT
 * @dev Can add whitelists address to buy first
 *
 * @dev Implementation of the {Ownable} contract
 *
 */

contract AntkPrivate is Ownable {
    /**
     * @dev numberOfTokenToSell is the number of ANTK to sell
     * @dev numberOfTokenBonus is the number of ANTK in bonus
     * @dev 6.5% if amountInDollars>500$ and 10% if >1500
     * @dev They are update when someone buy
     */
    uint256 public numberOfTokenToSell = 500000000;
    uint256 public numberOfTokenBonus = 10000000;

    /**
     * @dev tether is the only ERC20 asset to buy ANTK
     * @dev ethPrice is the Chainlink address Price of eth
     * @dev anktWallet is the wallet that will recover the funds
     */
    address immutable usdt;
    address immutable ethPrice;
    address immutable antkWallet;

    /**
     * @dev root is the rootHash of the whitelisted address
     */
    bytes32 private root;

    /**
     * @dev activeEth to secure the buyEth if chainlink doesn't work
     */
    bool unactiveEth;

    /// save informations about the buyers
    struct Investor {
        uint128 numberOfTokensPurchased;
        uint128 amountSpendInDollars;
        uint128 bonusTokens;
    }

    /// buyer's address  => buyer's informations
    mapping(address => Investor) public investors;

    /// status of this sales contract
    enum SalesStatus {
        AdminTime,
        SalesForWhitelist,
        SalesForAll
    }

    /// salesStatus is the status of the sales
    SalesStatus public salesStatus;

    /// event when owner change status
    event NewStatus(SalesStatus newStatus);

    /// event when someone buy
    event TokensBuy(
        address addressBuyer,
        uint256 numberOfTokensPurchased,
        uint256 amountSpendInDollars
    );

    /**
     * @notice Constructor to set address at the deployement
     * @param _usdt is the ERC20 asset to buy Antk
     * @param _ethPrice is the Chainlink address Price of eth
     * @param _antkWallet is the wallet that will recover the funds
     * @param _root is the rootHash of the whitelisted address
     */
    constructor(
        address _usdt,
        address _ethPrice,
        address _antkWallet,
        bytes32 _root
    ) {
        usdt = _usdt;
        ethPrice = _ethPrice;
        antkWallet = _antkWallet;
        root = _root;
    }

    /**
     * @notice check that the purchase parameters are correct
     * @dev called in function buy with ETH and buy with USDT
     * @param _amount is the amount to buy in dollars
     */
    modifier requireToBuy(uint256 _amount, bytes32[] calldata _merkleProof) {
        require(
            (isWhitelist(_merkleProof) && salesStatus == SalesStatus(1)) ||
                salesStatus == SalesStatus(2),
            "Vous ne pouvez pas investir pour le moment !"
        );
        require(_amount >= 1, "Ce montant est inferieur au montant minimum !");
        require(
            calculNumberOfTokenToBuy(_amount) <= numberOfTokenToSell,
            "Il ne reste plus assez de tokens disponibles !"
        );
        _;
    }

    /**
     * @notice set the root to set whitelisted address
     * @dev only owner can call this function
     * @param _root is the rootHash of the whitelisted address
     */
    function setRoot(bytes32 _root) external onlyOwner {
        root = _root;
    }

    /**
     * @notice check if the address is whitelisted
     * @param _merkleProof is an array of proof on the webApp
     */
    function isWhitelist(bytes32[] calldata _merkleProof)
        public
        view
        returns (bool)
    {
        bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
        return MerkleProof.verify(_merkleProof, root, leaf);
    }

    /**
     * @notice change the status of the sale
     * @dev only the Owner of the contract can call this function
     * @param _idStatus is the id of the status
     */
    function changeSalesStatus(uint256 _idStatus) external onlyOwner {
        salesStatus = SalesStatus(_idStatus);

        emit NewStatus(SalesStatus(_idStatus));
    }

    /**
     * @notice calcul number of token to buy
     * @dev this is a public function, called in the modifier and buy function
     * @dev we use it with the dapp to show the number of token to buy
     * @param _amountDollars is the amount to buy in dollars
     */
    function calculNumberOfTokenToBuy(uint256 _amountDollars)
        public
        view
        returns (uint256)
    {
        require(
            _amountDollars <= 100000,
            "Vous ne pouvez pas investir plus de 100 000 $"
        );
        if (numberOfTokenToSell > 400000000) {
            if (
                (numberOfTokenToSell - (_amountDollars * 10000) / 6) >=
                400000000
            ) return (_amountDollars * 10000) / 6;
            else {
                return
                    (numberOfTokenToSell - 400000000) +
                    ((_amountDollars -
                        (((numberOfTokenToSell - 400000000) * 6) / 10000)) /
                        8) *
                    10000;
            }
        } else if (numberOfTokenToSell > 300000000) {
            if (
                (numberOfTokenToSell - (_amountDollars * 10000) / 8) >=
                300000000
            ) return (_amountDollars * 10000) / 8;
            else {
                return
                    (numberOfTokenToSell - 300000000) +
                    (_amountDollars -
                        (((numberOfTokenToSell - 300000000) * 8) / 10000)) *
                    1000;
            }
        } else {
            return _amountDollars * 1000;
        }
    }

    /**
     * @notice buy ANTK with USDT
     * @param _amountDollars is the amount to buy in dollars
     */
    function buyTokenWithTether(
        uint128 _amountDollars,
        bytes32[] calldata _merkleProof
    ) external requireToBuy(_amountDollars, _merkleProof) {
        uint256 numberOfTokenToBuy = calculNumberOfTokenToBuy(_amountDollars);

        bool result = IERC20(usdt).transferFrom(
            msg.sender,
            address(this),
            _amountDollars * 10**6
        );
        require(result, "Transfer from error");

        investors[msg.sender].numberOfTokensPurchased += uint128(
            numberOfTokenToBuy
        );
        investors[msg.sender].amountSpendInDollars += _amountDollars;

        emit TokensBuy(msg.sender, numberOfTokenToBuy, _amountDollars);

        numberOfTokenToSell -= numberOfTokenToBuy;

        if (_amountDollars >= 500 && numberOfTokenBonus > 0) {
            _setBonus(uint128(numberOfTokenToBuy), uint128(_amountDollars));
        }
    }

    /**
     * @notice Get price of ETH in $ with Chainlink
     */
    function getLatestPrice() public view returns (uint256) {
        AggregatorV3Interface priceFeed = AggregatorV3Interface(
            ethPrice
        );
        (, int256 price, , , ) = priceFeed.latestRoundData();

        return uint256(price);
    }

    /**
     * @notice buy ANTK with ETH
     * @dev msg.value is the amount of ETH to send buy the buyer
     */
    function buyTokenWithEth(bytes32[] calldata _merkleProof)
        external
        payable
        requireToBuy(
            uint256((msg.value * getLatestPrice()) / 10**26),
            _merkleProof
        )
    {
        require(
            !unactiveEth,
            "Vous ne pouvez pas acheter en Eth pour le moment !"
        );
        uint256 amountInDollars = uint256(
            (msg.value * getLatestPrice()) / 10**26
        );

        uint256 numberOfTokenToBuy = calculNumberOfTokenToBuy(amountInDollars);

        investors[msg.sender].numberOfTokensPurchased += uint128(
            numberOfTokenToBuy
        );
        investors[msg.sender].amountSpendInDollars += uint128(amountInDollars);

        emit TokensBuy(msg.sender, numberOfTokenToBuy, amountInDollars);

        numberOfTokenToSell -= numberOfTokenToBuy;

        if (amountInDollars >= 500 && numberOfTokenBonus > 0) {
            _setBonus(uint128(numberOfTokenToBuy), uint128(amountInDollars));
        }
    }

    /**
     * @notice set the bonus to the buyer
     * @param _numberToken is the number of token buy
     * @param _amountDollars is the price in dollars
     */
    function _setBonus(uint128 _numberToken, uint128 _amountDollars) private {
        uint128 bonus;
        if (_amountDollars >= 1500) {
            if (numberOfTokenBonus >= _numberToken / 10) {
                bonus = _numberToken / 10;
            } else bonus = uint128(numberOfTokenBonus);
        } else {
            if (numberOfTokenBonus >= (_numberToken * 65) / 1000) {
                bonus = (_numberToken * 65) / 1000;
            } else {
                bonus = uint128(numberOfTokenBonus);
            }
        }
        investors[msg.sender].bonusTokens += bonus;
        numberOfTokenBonus -= bonus;
    }

    /**
     * @notice send the USDT and the ETH to ANTK company
     * @dev only the Owner of the contract can call this function
     */
     function secureBuyEth() external onlyOwner {
        if(!unactiveEth){unactiveEth=true;}
        else unactiveEth = false;
     }

    /**
     * @notice send the USDT and the ETH to ANTK company
     * @dev only the Owner of the contract can call this function
     */
    function getFunds() external onlyOwner {
        IERC20(usdt).transfer(
            antkWallet,
            IERC20(usdt).balanceOf(address(this))
        );

        (bool sent, ) = antkWallet.call{value: address(this).balance}("");
        require(sent, "Failed to send Ether");
    }

}