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0xd21DE8f0860dd779F936fda4e9DC38ee84F27CAC

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0xa9b4F089...71E435f0b at txn 0x6e333d4cc955cd7d4cd846fa669e22a66580434cae5a713daa87447a5d3e7e22

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Latest 25 from a total of 569 transactions

Transaction Hash	Method	Block		From		To
0x068982c3d1d92c8cb53f1ab064fdb20ae520f634e938ba4351eb855ff827f927	Emergency Withdr...	74915906	2024-01-30 7:27:49	227 days ago	1706599669	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00029173	4.5
0x9ce2b9be2dee964a91a20560e9adc216fc57bf557ee8a720b0096a810b376406	Deposit	74915760	2024-01-30 7:21:34	227 days ago	1706599294	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00064955	5
0xc50074cb2133feae97dade930e6c71d40c5f51dff41ed9ca4bf78da2df11e424	Deposit	66970963	2023-08-14 8:35:30	396 days ago	1692002130	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00077192	6
0xf79211952ff231e03f210193d68f7e011223ad1657a80f7e5896d8a17ef05599	Deposit	66970963	2023-08-14 8:35:30	396 days ago	1692002130	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00078872	6
0x7f33855a00c0d873209bcd36bc50c86a6da1fbf3907b16c447f06f87a020d121	Deposit	66970955	2023-08-14 8:35:08	396 days ago	1692002108	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00078872	6
0x3b1dc49c44a5ac96ae8f1f7b2a5293e92cdc435f68c813c94f45ff21b0734ed0	Deposit	66970952	2023-08-14 8:34:56	396 days ago	1692002096	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00078803	6
0xd9eedb0f5ca6624d94c6a36b99f76b73350c3ca54006193571c7186535d3ab0f	Deposit	66970940	2023-08-14 8:34:22	396 days ago	1692002062	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00078798	6
0x138ebd6134eacfe7aaaaae6e1f4c7af80662916b12f4e4d51ded0e084b2cb300	Withdraw	66970928	2023-08-14 8:33:52	396 days ago	1692002032	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00108225	6
0x48a80aa5306f36027312ab9b3668f3a9355c389599887042f122e698aabbfd80	Deposit	58252939	2023-03-24 4:09:57	539 days ago	1679630997	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.0037657	28.69786223
0x10d28ca9158d8794f6d24b5779d95afa790bcad580b75a6c0780038faed41cca	Deposit	58252935	2023-03-24 4:09:47	539 days ago	1679630987	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00376217	28.69786223
0x1a1bbe425e47bac5df5f518d7b855a4f86da61b723dab4f138943a5c7e24cfc6	Deposit	58252888	2023-03-24 4:08:37	539 days ago	1679630917	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00427293	28.62244939
0x524c83a32ee13c99096c55d6035c7725e7251bb3d5478c0dce48192afce750c4	Deposit	55977225	2023-02-17 9:16:21	574 days ago	1676625381	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00465211	31.16243219
0xcfeb13dc430eeeda686351c3c3e259c0ea725292be88451e02a84ad165202b0e	Deposit	53265611	2023-01-05 9:47:35	617 days ago	1672912055	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00369606	28.11682579
0xaa6513039e4d15a25ac3e6a96c8098c4c9b20e6fa4b686fa9561ca16dfcffc92	Deposit	53265584	2023-01-05 9:47:03	617 days ago	1672912023	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00369776	28.12968905
0x6f76941f96df9db4002cc262b102b12da26680c63dcf753e9a1d7e5fb4139397	Deposit	53265570	2023-01-05 9:46:45	617 days ago	1672912005	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00368822	28.08173329
0xc02df5451394a3dc8d16ad34480efaf4e5dbe8d9daa786e17f9e2de38defa815	Deposit	53265542	2023-01-05 9:45:57	617 days ago	1672911957	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00364456	28.32845872
0x21b691b13c7ad674060e8396dd13cc19d03496e7fe2954ab7d6e49c7d5611c6c	Deposit	53265518	2023-01-05 9:45:27	617 days ago	1672911927	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00362747	28.22260633
0x6fc07aaf127d737e4dc379f7fc6f6195748bbd740df3bd69ca0ddeb0cb4e54ce	Deposit	53265501	2023-01-05 9:45:05	617 days ago	1672911905	0x0b4103D7...498130c32	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00422452	28.29818096
0x70123b5df7671b44fadb35051658410771475c6e7b42f4a17326e5264e319c27	Deposit	53085304	2023-01-02 1:56:15	620 days ago	1672624575	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00033266	2.22839593
0x043951a61e823de88482b9f1d5fb81e15bc2beea043b4159b8f8f36a1dcbc3b4	Deposit	52846701	2022-12-25 15:48:01	628 days ago	1671983281	0x4d9A30B7...B30E390aA	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.0055231	37
0xd17d32e3b16853915c203d70ec67aa9d6dc4fceb9a052ae0af8fdc78d2dab1cf	Deposit	52142057	2022-12-11 3:35:27	642 days ago	1670729727	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00240599	16.11670636
0xb1eef9b978fefbd392d3fcbbebbefd08d7003559bbcc1f3dac4b1f8caedd9faa	Deposit	51226328	2022-11-21 6:52:56	662 days ago	1669013576	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00907697	60.80257492
0xb837dfd0591960f8427c2bab3a6d9f1764491f4f8e43c03cef36d53e33a1dca9	Deposit	50080267	2022-10-27 4:49:50	687 days ago	1666846190	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00016869	1.13
0xb2f4e220385f9588767fff771927e8c1c0ade1f3f4340ae8e072f9b3f140dd8d	Deposit	49955736	2022-10-25 7:05:19	689 days ago	1666681519	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00015525	1.04
0xcc1d7bc8ed0b369788e613496ab7847ffd36af638ede7b2c769ac3010ed9773f	Deposit	49816654	2022-10-23 6:33:02	691 days ago	1666506782	0x872AF3cb...d4a86DD93	IN	0xd21DE8f0...e84F27CAC	0 FTM$0.00	0.00015152	1.015

View all transactions

Latest 1 internal transaction

Parent Transaction Hash	Block		From		To
0x6e333d4cc955cd7d4cd846fa669e22a66580434cae5a713daa87447a5d3e7e22	34374844	2022-03-25 16:21:53	903 days ago	1648225313	0xa9b4F089...71E435f0b		Contract Creation	0 FTM$0.00

Contract Source Code Verified (Exact Match)

Contract Name:

MasterChef

Compiler Version

v0.6.12+commit.27d51765

Optimization Enabled:

No with 200 runs

Other Settings:

default evmVersion, MIT license

Contract Source Code (Solidity)

IDE

/**
 *Submitted for verification at ftmscan.com on 2022-03-25
*/

// SPDX-License-Identifier: MIT
// Sources flattened with hardhat v2.9.1 https://hardhat.org

// File @openzeppelin/contracts/math/[email protected]

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

// File contracts/libs/IBEP20.sol

pragma solidity >=0.4.0;

interface IBEP20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the token decimals.
     */
    function decimals() external view returns (uint8);

    /**
     * @dev Returns the token symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the token name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the bep token owner.
     */
    function getOwner() external view returns (address);

    /**
     * @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);

    /**
     * @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/[email protected]

pragma solidity >=0.6.2 <0.8.0;

/**
 * @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;
        // solhint-disable-next-line no-inline-assembly
        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"
        );

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File contracts/libs/SafeBEP20.sol

pragma solidity >=0.6.0;

/**
 * @title SafeBEP20
 * @dev Wrappers around BEP20 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 SafeBEP20 for IBEP20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeBEP20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(
        IBEP20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transfer.selector, to, value)
        );
    }

    function safeTransferFrom(
        IBEP20 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
     * {IBEP20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IBEP20 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'
        // solhint-disable-next-line max-line-length
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeBEP20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, value)
        );
    }

    function safeIncreaseAllowance(
        IBEP20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(
            value
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    function safeDecreaseAllowance(
        IBEP20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeBEP20: decreased allowance below zero"
        );
        _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(IBEP20 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,
            "SafeBEP20: low-level call failed"
        );
        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(
                abi.decode(returndata, (bool)),
                "SafeBEP20: BEP20 operation did not succeed"
            );
        }
    }
}

// File contracts/libs/IReferral.sol

pragma solidity >=0.6.12;

interface IFantaReferral {
    /**
     * @dev Record referral.
     */
    function recordReferral(address user, address referrer) external;

    /**
     * @dev Get the referrer address that referred the user.
     */
    function getReferrer(address user) external view returns (address);
}

// File @openzeppelin/contracts/utils/[email protected]

pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File @openzeppelin/contracts/access/[email protected]

pragma solidity >=0.6.0 <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() internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), 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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File @openzeppelin/contracts/utils/[email protected]

pragma solidity >=0.6.0 <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() internal {
        _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 make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// File contracts/libs/BEP20.sol

pragma solidity >=0.4.0;

/**
 * @dev Implementation of the {IBEP20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {BEP20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-BEP20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of BEP20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IBEP20-approve}.
 */
contract BEP20 is Context, IBEP20, Ownable {
    using SafeMath for uint256;
    using Address for address;

    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name, string memory symbol) public {
        _name = name;
        _symbol = symbol;
        _decimals = 18;
    }

    /**
     * @dev Returns the bep token owner.
     */
    function getOwner() external view override returns (address) {
        return owner();
    }

    /**
     * @dev Returns the token name.
     */
    function name() public view override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the token decimals.
     */
    function decimals() public view override returns (uint8) {
        return _decimals;
    }

    /**
     * @dev Returns the token symbol.
     */
    function symbol() public view override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {BEP20-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {BEP20-balanceOf}.
     */
    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {BEP20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount)
        public
        override
        returns (bool)
    {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {BEP20-allowance}.
     */
    function allowance(address owner, address spender)
        public
        view
        override
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {BEP20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount)
        public
        override
        returns (bool)
    {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {BEP20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {BEP20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(
                amount,
                "BEP20: transfer amount exceeds allowance"
            )
        );
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {BEP20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue)
        public
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].add(addedValue)
        );
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {BEP20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(
                subtractedValue,
                "BEP20: decreased allowance below zero"
            )
        );
        return true;
    }

    /**
     * @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
     * the total supply.
     *
     * Requirements
     *
     * - `msg.sender` must be the token owner
     */
    function mint(uint256 amount) public onlyOwner returns (bool) {
        _mint(_msgSender(), amount);
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "BEP20: transfer from the zero address");
        require(recipient != address(0), "BEP20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(
            amount,
            "BEP20: transfer amount exceeds balance"
        );
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "BEP20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal {
        require(account != address(0), "BEP20: burn from the zero address");

        _balances[account] = _balances[account].sub(
            amount,
            "BEP20: burn amount exceeds balance"
        );
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal {
        require(owner != address(0), "BEP20: approve from the zero address");
        require(spender != address(0), "BEP20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(
            account,
            _msgSender(),
            _allowances[account][_msgSender()].sub(
                amount,
                "BEP20: burn amount exceeds allowance"
            )
        );
    }
}

// File @uniswap/v2-periphery/contracts/interfaces/[email protected]

pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETH(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountToken, uint256 amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountToken, uint256 amountETH);

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactETHForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapTokensForExactETH(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactTokensForETH(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapETHForExactTokens(
        uint256 amountOut,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) external pure returns (uint256 amountB);

    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountOut);

    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountIn);

    function getAmountsOut(uint256 amountIn, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);

    function getAmountsIn(uint256 amountOut, address[] calldata path)
        external
        view
        returns (uint256[] memory amounts);
}

// File @uniswap/v2-periphery/contracts/interfaces/[email protected]

pragma solidity >=0.6.2;

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

// File @uniswap/v2-core/contracts/interfaces/[email protected]

pragma solidity >=0.5.0;

interface IUniswapV2Pair {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transfer(address to, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        );

    function price0CumulativeLast() external view returns (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function mint(address to) external returns (uint256 liquidity);

    function burn(address to)
        external
        returns (uint256 amount0, uint256 amount1);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

// File @uniswap/v2-core/contracts/interfaces/[email protected]

pragma solidity >=0.5.0;

interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB)
        external
        view
        returns (address pair);

    function allPairs(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

// File contracts/Token.sol

pragma solidity >=0.6.12;

// FantaToken with Governance.
contract FantaToken is BEP20 {
    // Transfer tax rate in basis points.
    uint16 public transferTaxRate;
    // Burn rate % of transfer tax.
    uint16 public burnRate;
    // Max transfer tax rate: 20%.
    uint16 public constant MAXIMUM_TRANSFER_TAX_RATE = 2000;
    // Burn address
    address public constant BURN_ADDRESS =
        0x000000000000000000000000000000000000dEaD;

    // Max transfer amount rate in basis points.
    uint16 public maxTransferAmountRate;
    // Addresses that excluded from antiWhale
    mapping(address => bool) private _excludedFromAntiWhale;
    // Automatic swap and liquify enabled
    bool public swapAndLiquifyEnabled = false;
    // Min amount to liquify. (default 500 FANTAs)
    uint256 public minAmountToLiquify = 500 ether;
    // The swap router, modifiable. Will be changed to FantaSwap's router when our own AMM release
    IUniswapV2Router02 public fantaSwapRouter;
    // The trading pair
    address public fantaSwapPair;
    // In swap and liquify
    bool private _inSwapAndLiquify;

    // Addresses that are excluded from transfer tax (for presale and masterchef contract only)
    mapping(address => bool) private _excludedFromTransferTax;

    // The operator can only update the transfer tax rate
    address private _operator;

    // Events
    event OperatorTransferred(
        address indexed previousOperator,
        address indexed newOperator
    );
    event TransferTaxRateUpdated(
        address indexed operator,
        uint256 previousRate,
        uint256 newRate
    );
    event BurnRateUpdated(
        address indexed operator,
        uint256 previousRate,
        uint256 newRate
    );
    event MaxTransferAmountRateUpdated(
        address indexed operator,
        uint256 previousRate,
        uint256 newRate
    );
    event SwapAndLiquifyEnabledUpdated(address indexed operator, bool enabled);
    event MinAmountToLiquifyUpdated(
        address indexed operator,
        uint256 previousAmount,
        uint256 newAmount
    );
    event FantaSwapRouterUpdated(
        address indexed operator,
        address indexed router,
        address indexed pair
    );
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    modifier onlyOperator() {
        require(
            _operator == msg.sender,
            "operator: caller is not the operator"
        );
        _;
    }

    modifier antiWhale(
        address sender,
        address recipient,
        uint256 amount
    ) {
        if (maxTransferAmount() > 0) {
            if (
                _excludedFromAntiWhale[sender] == false &&
                _excludedFromAntiWhale[recipient] == false
            ) {
                require(
                    amount <= maxTransferAmount(),
                    "FANTA::antiWhale: Transfer amount exceeds the maxTransferAmount"
                );
            }
        }
        _;
    }

    modifier lockTheSwap() {
        _inSwapAndLiquify = true;
        _;
        _inSwapAndLiquify = false;
    }

    modifier transferTaxFree() {
        uint16 _transferTaxRate = transferTaxRate;
        transferTaxRate = 0;
        _;
        transferTaxRate = _transferTaxRate;
    }

    /**
     * @notice Constructs the FantaToken contract.
     */
    constructor(
        uint16 _transferTaxRate,
        uint16 _burnRate,
        uint16 _maxTransferAmountRate
    ) public BEP20("Fanta Token", "FANTA") {
        _operator = _msgSender();
        emit OperatorTransferred(address(0), _operator);

        transferTaxRate = _transferTaxRate;
        burnRate = _burnRate;
        maxTransferAmountRate = _maxTransferAmountRate;

        _excludedFromAntiWhale[msg.sender] = true;
        _excludedFromAntiWhale[address(0)] = true;
        _excludedFromAntiWhale[address(this)] = true;
        _excludedFromAntiWhale[BURN_ADDRESS] = true;
    }

    /// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef).
    function mint(address _to, uint256 _amount) public onlyOwner {
        _mint(_to, _amount);
        _moveDelegates(address(0), _delegates[_to], _amount);
    }

    /// @dev overrides transfer function to meet tokenomics of FANTA
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual override antiWhale(sender, recipient, amount) {
        // swap and liquify
        if (
            swapAndLiquifyEnabled == true &&
            _inSwapAndLiquify == false &&
            address(fantaSwapRouter) != address(0) &&
            fantaSwapPair != address(0) &&
            sender != fantaSwapPair &&
            sender != owner()
        ) {
            swapAndLiquify();
        }

        if (
            recipient == BURN_ADDRESS ||
            transferTaxRate == 0 ||
            _excludedFromTransferTax[sender] ||
            _excludedFromTransferTax[recipient]
        ) {
            super._transfer(sender, recipient, amount);
        } else {
            // default tax is 5% of every transfer
            uint256 taxAmount = amount.mul(transferTaxRate).div(10000);
            uint256 burnAmount = taxAmount.mul(burnRate).div(100);
            uint256 liquidityAmount = taxAmount.sub(burnAmount);
            require(
                taxAmount == burnAmount + liquidityAmount,
                "FANTA::transfer: Burn value invalid"
            );

            // default 95% of transfer sent to recipient
            uint256 sendAmount = amount.sub(taxAmount);
            require(
                amount == sendAmount + taxAmount,
                "FANTA::transfer: Tax value invalid"
            );

            super._transfer(sender, BURN_ADDRESS, burnAmount);
            super._transfer(sender, address(this), liquidityAmount);
            super._transfer(sender, recipient, sendAmount);
            amount = sendAmount;
        }
    }

    /// @dev Swap and liquify
    function swapAndLiquify() private lockTheSwap transferTaxFree {
        uint256 contractTokenBalance = balanceOf(address(this));
        uint256 maxTransferAmount = maxTransferAmount();
        contractTokenBalance = contractTokenBalance > maxTransferAmount
            ? maxTransferAmount
            : contractTokenBalance;

        if (contractTokenBalance >= minAmountToLiquify) {
            // only min amount to liquify
            uint256 liquifyAmount = minAmountToLiquify;

            // split the liquify amount into halves
            uint256 half = liquifyAmount.div(2);
            uint256 otherHalf = liquifyAmount.sub(half);

            // capture the contract's current ETH balance.
            // this is so that we can capture exactly the amount of ETH that the
            // swap creates, and not make the liquidity event include any ETH that
            // has been manually sent to the contract
            uint256 initialBalance = address(this).balance;

            // swap tokens for ETH
            swapTokensForEth(half);

            // how much ETH did we just swap into?
            uint256 newBalance = address(this).balance.sub(initialBalance);

            // add liquidity
            addLiquidity(otherHalf, newBalance);

            emit SwapAndLiquify(half, newBalance, otherHalf);
        }
    }

    /// @dev Swap tokens for eth
    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the fantaSwap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = fantaSwapRouter.WETH();

        _approve(address(this), address(fantaSwapRouter), tokenAmount);

        // make the swap
        fantaSwapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    /// @dev Add liquidity
    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(fantaSwapRouter), tokenAmount);

        // add the liquidity
        fantaSwapRouter.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            operator(),
            block.timestamp
        );
    }

    /**
     * @dev Returns the max transfer amount.
     */
    function maxTransferAmount() public view returns (uint256) {
        return totalSupply().mul(maxTransferAmountRate).div(10000);
    }

    /**
     * @dev Returns the address is excluded from antiWhale or not.
     */
    function isExcludedFromAntiWhale(address _account)
        public
        view
        returns (bool)
    {
        return _excludedFromAntiWhale[_account];
    }

    /**
     * @dev Returns if the address is excluded from transferTax or not.
     */
    function isExcludedFromTransferTax(address _account)
        public
        view
        returns (bool)
    {
        return _excludedFromTransferTax[_account];
    }

    // To receive BNB from fantaSwapRouter when swapping
    receive() external payable {}

    /**
     * @dev Update the transfer tax rate.
     * Can only be called by the current operator.
     */
    function updateTransferTaxRate(uint16 _transferTaxRate)
        public
        onlyOperator
    {
        require(
            _transferTaxRate <= MAXIMUM_TRANSFER_TAX_RATE,
            "FANTA::updateTransferTaxRate: Transfer tax rate must not exceed the maximum rate."
        );
        emit TransferTaxRateUpdated(
            msg.sender,
            transferTaxRate,
            _transferTaxRate
        );
        transferTaxRate = _transferTaxRate;
    }

    /**
     * @dev Update the burn rate.
     * Can only be called by the current operator.
     */
    function updateBurnRate(uint16 _burnRate) public onlyOperator {
        require(
            _burnRate <= 100,
            "FANTA::updateBurnRate: Burn rate must not exceed the maximum rate."
        );
        emit BurnRateUpdated(msg.sender, burnRate, _burnRate);
        burnRate = _burnRate;
    }

    /**
     * @dev Update the max transfer amount rate.
     * Can only be called by the current operator.
     */
    function updateMaxTransferAmountRate(uint16 _maxTransferAmountRate)
        public
        onlyOperator
    {
        require(
            _maxTransferAmountRate <= 10000,
            "FANTA::updateMaxTransferAmountRate: Max transfer amount rate must not exceed the maximum rate."
        );
        emit MaxTransferAmountRateUpdated(
            msg.sender,
            maxTransferAmountRate,
            _maxTransferAmountRate
        );
        maxTransferAmountRate = _maxTransferAmountRate;
    }

    /**
     * @dev Update the min amount to liquify.
     * Can only be called by the current operator.
     */
    function updateMinAmountToLiquify(uint256 _minAmount) public onlyOperator {
        emit MinAmountToLiquifyUpdated(
            msg.sender,
            minAmountToLiquify,
            _minAmount
        );
        minAmountToLiquify = _minAmount;
    }

    /**
     * @dev Exclude or include an address from antiWhale.
     * Can only be called by the current operator.
     */
    function setExcludedFromAntiWhale(address _account, bool _excluded)
        public
        onlyOperator
    {
        _excludedFromAntiWhale[_account] = _excluded;
    }

    /**
     * @dev Exclude or include an address from transferTax.
     * Can only be called by the current operator.
     */
    function setExcludedFromTransferTax(address _account, bool _excluded)
        public
        onlyOperator
    {
        _excludedFromTransferTax[_account] = _excluded;
    }

    /**
     * @dev Update the swapAndLiquifyEnabled.
     * Can only be called by the current operator.
     */
    function updateSwapAndLiquifyEnabled(bool _enabled) public onlyOperator {
        emit SwapAndLiquifyEnabledUpdated(msg.sender, _enabled);
        swapAndLiquifyEnabled = _enabled;
    }

    /**
     * @dev Update the swap router.
     * Can only be called by the current operator.
     */
    function updateSwapRouter(address _router) public onlyOperator {
        fantaSwapRouter = IUniswapV2Router02(_router);
        fantaSwapPair = IUniswapV2Factory(fantaSwapRouter.factory()).getPair(
            address(this),
            fantaSwapRouter.WETH()
        );
        require(
            fantaSwapPair != address(0),
            "FANTA::updateFantaSwapRouter: Invalid pair address."
        );
        emit FantaSwapRouterUpdated(
            msg.sender,
            address(fantaSwapRouter),
            fantaSwapPair
        );
    }

    /**
     * @dev Returns the address of the current operator.
     */
    function operator() public view returns (address) {
        return _operator;
    }

    /**
     * @dev Transfers operator of the contract to a new account (`newOperator`).
     * Can only be called by the current operator.
     */
    function transferOperator(address newOperator) public onlyOperator {
        require(
            newOperator != address(0),
            "FANTA::transferOperator: new operator is the zero address"
        );
        emit OperatorTransferred(_operator, newOperator);
        _operator = newOperator;
    }

    // Copied and modified from YAM code:
    // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol
    // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol
    // Which is copied and modified from COMPOUND:
    // https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol

    /// @dev A record of each accounts delegate
    mapping(address => address) internal _delegates;

    /// @notice A checkpoint for marking number of votes from a given block
    struct Checkpoint {
        uint32 fromBlock;
        uint256 votes;
    }

    /// @notice A record of votes checkpoints for each account, by index
    mapping(address => mapping(uint32 => Checkpoint)) public checkpoints;

    /// @notice The number of checkpoints for each account
    mapping(address => uint32) public numCheckpoints;

    /// @notice The EIP-712 typehash for the contract's domain
    bytes32 public constant DOMAIN_TYPEHASH =
        keccak256(
            "EIP712Domain(string name,uint256 chainId,address verifyingContract)"
        );

    /// @notice The EIP-712 typehash for the delegation struct used by the contract
    bytes32 public constant DELEGATION_TYPEHASH =
        keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");

    /// @notice A record of states for signing / validating signatures
    mapping(address => uint256) public nonces;

    /// @notice An event thats emitted when an account changes its delegate
    event DelegateChanged(
        address indexed delegator,
        address indexed fromDelegate,
        address indexed toDelegate
    );

    /// @notice An event thats emitted when a delegate account's vote balance changes
    event DelegateVotesChanged(
        address indexed delegate,
        uint256 previousBalance,
        uint256 newBalance
    );

    /**
     * @notice Delegate votes from `msg.sender` to `delegatee`
     * @param delegator The address to get delegatee for
     */
    function delegates(address delegator) external view returns (address) {
        return _delegates[delegator];
    }

    /**
     * @notice Delegate votes from `msg.sender` to `delegatee`
     * @param delegatee The address to delegate votes to
     */
    function delegate(address delegatee) external {
        return _delegate(msg.sender, delegatee);
    }

    /**
     * @notice Delegates votes from signatory to `delegatee`
     * @param delegatee The address to delegate votes to
     * @param nonce The contract state required to match the signature
     * @param expiry The time at which to expire the signature
     * @param v The recovery byte of the signature
     * @param r Half of the ECDSA signature pair
     * @param s Half of the ECDSA signature pair
     */
    function delegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        bytes32 domainSeparator = keccak256(
            abi.encode(
                DOMAIN_TYPEHASH,
                keccak256(bytes(name())),
                getChainId(),
                address(this)
            )
        );

        bytes32 structHash = keccak256(
            abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)
        );

        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainSeparator, structHash)
        );

        address signatory = ecrecover(digest, v, r, s);
        require(
            signatory != address(0),
            "FANTA::delegateBySig: invalid signature"
        );
        require(
            nonce == nonces[signatory]++,
            "FANTA::delegateBySig: invalid nonce"
        );
        require(now <= expiry, "FANTA::delegateBySig: signature expired");
        return _delegate(signatory, delegatee);
    }

    /**
     * @notice Gets the current votes balance for `account`
     * @param account The address to get votes balance
     * @return The number of current votes for `account`
     */
    function getCurrentVotes(address account) external view returns (uint256) {
        uint32 nCheckpoints = numCheckpoints[account];
        return
            nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
    }

    /**
     * @notice Determine the prior number of votes for an account as of a block number
     * @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
     * @param account The address of the account to check
     * @param blockNumber The block number to get the vote balance at
     * @return The number of votes the account had as of the given block
     */
    function getPriorVotes(address account, uint256 blockNumber)
        external
        view
        returns (uint256)
    {
        require(
            blockNumber < block.number,
            "FANTA::getPriorVotes: not yet determined"
        );

        uint32 nCheckpoints = numCheckpoints[account];
        if (nCheckpoints == 0) {
            return 0;
        }

        // First check most recent balance
        if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
            return checkpoints[account][nCheckpoints - 1].votes;
        }

        // Next check implicit zero balance
        if (checkpoints[account][0].fromBlock > blockNumber) {
            return 0;
        }

        uint32 lower = 0;
        uint32 upper = nCheckpoints - 1;
        while (upper > lower) {
            uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
            Checkpoint memory cp = checkpoints[account][center];
            if (cp.fromBlock == blockNumber) {
                return cp.votes;
            } else if (cp.fromBlock < blockNumber) {
                lower = center;
            } else {
                upper = center - 1;
            }
        }
        return checkpoints[account][lower].votes;
    }

    function _delegate(address delegator, address delegatee) internal {
        address currentDelegate = _delegates[delegator];
        uint256 delegatorBalance = balanceOf(delegator); // balance of underlying FANTAs (not scaled);
        _delegates[delegator] = delegatee;

        emit DelegateChanged(delegator, currentDelegate, delegatee);

        _moveDelegates(currentDelegate, delegatee, delegatorBalance);
    }

    function _moveDelegates(
        address srcRep,
        address dstRep,
        uint256 amount
    ) internal {
        if (srcRep != dstRep && amount > 0) {
            if (srcRep != address(0)) {
                // decrease old representative
                uint32 srcRepNum = numCheckpoints[srcRep];
                uint256 srcRepOld = srcRepNum > 0
                    ? checkpoints[srcRep][srcRepNum - 1].votes
                    : 0;
                uint256 srcRepNew = srcRepOld.sub(amount);
                _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
            }

            if (dstRep != address(0)) {
                // increase new representative
                uint32 dstRepNum = numCheckpoints[dstRep];
                uint256 dstRepOld = dstRepNum > 0
                    ? checkpoints[dstRep][dstRepNum - 1].votes
                    : 0;
                uint256 dstRepNew = dstRepOld.add(amount);
                _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
            }
        }
    }

    function _writeCheckpoint(
        address delegatee,
        uint32 nCheckpoints,
        uint256 oldVotes,
        uint256 newVotes
    ) internal {
        uint32 blockNumber = safe32(
            block.number,
            "FANTA::_writeCheckpoint: block number exceeds 32 bits"
        );

        if (
            nCheckpoints > 0 &&
            checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber
        ) {
            checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
        } else {
            checkpoints[delegatee][nCheckpoints] = Checkpoint(
                blockNumber,
                newVotes
            );
            numCheckpoints[delegatee] = nCheckpoints + 1;
        }

        emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
    }

    function safe32(uint256 n, string memory errorMessage)
        internal
        pure
        returns (uint32)
    {
        require(n < 2**32, errorMessage);
        return uint32(n);
    }

    function getChainId() internal pure returns (uint256) {
        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        return chainId;
    }
}

// File contracts/MasterChef.sol

pragma solidity 0.6.12;

// MasterChef is the master of Fanta. He can make Fanta and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once FANTA is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract MasterChef is Ownable, ReentrancyGuard {
    using SafeMath for uint256;
    using SafeBEP20 for IBEP20;

    // Info of each user.
    struct UserInfo {
        uint256 amount; // How many LP tokens the user has provided.
        uint256 rewardDebt; // Reward debt. See explanation below.
        //
        // We do some fancy math here. Basically, any point in time, the amount of FANTAs
        // entitled to a user but is pending to be distributed is:
        //
        //   pending reward = (user.amount * pool.accFantaPerShare) - user.rewardDebt
        //
        // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
        //   1. The pool's `accFantaPerShare` (and `lastRewardBlock`) gets updated.
        //   2. User receives the pending reward sent to his/her address.
        //   3. User's `amount` gets updated.
        //   4. User's `rewardDebt` gets updated.
    }

    // Info of each pool.
    struct PoolInfo {
        IBEP20 lpToken; // Address of LP token contract.
        uint256 allocPoint; // How many allocation points assigned to this pool. FANTAs to distribute per block.
        uint256 lastRewardBlock; // Last block number that FANTAs distribution occurs.
        uint256 accFantaPerShare; // Accumulated FANTAs per share, times 1e12. See below.
        uint16 depositFeeBP; // Deposit fee in basis points
    }

    // The FANTA TOKEN!
    FantaToken public fanta;
    // Dev address.
    address public devAddress;
    // Deposit Fee address
    address public feeAddress;
    // FANTA tokens created per block.
    uint256 public fantaPerBlock;
    // Bonus muliplier for early fanta makers.
    uint256 public constant BONUS_MULTIPLIER = 1;

    // Max supply
    uint256 public MAX_TOKEN_SUPPLY;

    // Info of each pool.
    PoolInfo[] public poolInfo;
    // Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    // Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint = 0;
    // The block number when FANTA mining starts.
    uint256 public startBlock;

    // Fanta referral contract address.
    IFantaReferral public fantaReferral;
    // Referral commission rate in basis points.
    uint16 public referralCommissionRate;
    // Max referral commission rate: 20%.
    uint16 public constant MAXIMUM_REFERRAL_COMMISSION_RATE = 2000;

    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(
        address indexed user,
        uint256 indexed pid,
        uint256 amount
    );
    event ReferralCommissionPaid(
        address indexed user,
        address indexed referrer,
        uint256 commissionAmount
    );

    constructor(
        FantaToken _fanta,
        uint256 _startBlock,
        uint256 _emissionRate,
        uint256 _maxSupply,
        uint16 _referralRate
    ) public {
        fanta = _fanta;
        startBlock = _startBlock;
        fantaPerBlock = _emissionRate * 0.0001 ether;
        MAX_TOKEN_SUPPLY = _maxSupply * 1 ether;
        referralCommissionRate = _referralRate;

        devAddress = msg.sender;
        feeAddress = msg.sender;
    }

    function poolLength() external view returns (uint256) {
        return poolInfo.length;
    }

    // Add a new lp to the pool. Can only be called by the owner.
    // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
    function add(
        uint256 _allocPoint,
        IBEP20 _lpToken,
        uint16 _depositFeeBP,
        bool _withUpdate
    ) public onlyOwner {
        require(_depositFeeBP <= 400, "add: invalid deposit fee basis points");
        if (_withUpdate) {
            massUpdatePools();
        }
        uint256 lastRewardBlock = block.number > startBlock
            ? block.number
            : startBlock;
        totalAllocPoint = totalAllocPoint.add(_allocPoint);
        poolInfo.push(
            PoolInfo({
                lpToken: _lpToken,
                allocPoint: _allocPoint,
                lastRewardBlock: lastRewardBlock,
                accFantaPerShare: 0,
                depositFeeBP: _depositFeeBP
            })
        );
    }

    // Update the given pool's FANTA allocation point and deposit fee. Can only be called by the owner.
    function set(
        uint256 _pid,
        uint256 _allocPoint,
        uint16 _depositFeeBP,
        bool _withUpdate
    ) public onlyOwner {
        require(_depositFeeBP <= 400, "set: invalid deposit fee basis points");
        if (_withUpdate) {
            massUpdatePools();
        }
        totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
            _allocPoint
        );
        poolInfo[_pid].allocPoint = _allocPoint;
        poolInfo[_pid].depositFeeBP = _depositFeeBP;
    }

    // Return reward multiplier over the given _from to _to block.
    function getMultiplier(uint256 _from, uint256 _to)
        public
        pure
        returns (uint256)
    {
        return _to.sub(_from).mul(BONUS_MULTIPLIER);
    }

    // View function to see pending FANTAs on frontend.
    function pendingFanta(uint256 _pid, address _user)
        external
        view
        returns (uint256)
    {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accFantaPerShare = pool.accFantaPerShare;
        if (fanta.totalSupply() >= MAX_TOKEN_SUPPLY) {
            return
                user.amount.mul(accFantaPerShare).div(1e12).sub(
                    user.rewardDebt
                );
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.number > pool.lastRewardBlock && lpSupply != 0) {
            uint256 multiplier = getMultiplier(
                pool.lastRewardBlock,
                block.number
            );
            uint256 fantaReward = multiplier
                .mul(fantaPerBlock)
                .mul(pool.allocPoint)
                .div(totalAllocPoint);
            accFantaPerShare = accFantaPerShare.add(
                fantaReward.mul(1e12).div(lpSupply)
            );
        }
        return user.amount.mul(accFantaPerShare).div(1e12).sub(user.rewardDebt);
    }

    // Update reward variables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            updatePool(pid);
        }
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        if (fanta.totalSupply() >= MAX_TOKEN_SUPPLY) {
            pool.lastRewardBlock = block.number;
            return;
        }
        if (block.number <= pool.lastRewardBlock) {
            return;
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (lpSupply == 0 || pool.allocPoint == 0) {
            pool.lastRewardBlock = block.number;
            return;
        }
        uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
        uint256 fantaReward = multiplier
            .mul(fantaPerBlock)
            .mul(pool.allocPoint)
            .div(totalAllocPoint);
        if (fanta.totalSupply().add(fantaReward) > MAX_TOKEN_SUPPLY) {
            fantaReward = MAX_TOKEN_SUPPLY.sub(fanta.totalSupply());
        } else {
            fanta.mint(devAddress, fantaReward.div(10));
        }
        fanta.mint(address(this), fantaReward);
        pool.accFantaPerShare = pool.accFantaPerShare.add(
            fantaReward.mul(1e12).div(lpSupply)
        );
        pool.lastRewardBlock = block.number;
    }

    // Deposit LP tokens to MasterChef for FANTA allocation.
    function deposit(
        uint256 _pid,
        uint256 _amount,
        address _referrer
    ) public nonReentrant {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        updatePool(_pid);
        if (
            _amount > 0 &&
            address(fantaReferral) != address(0) &&
            _referrer != address(0) &&
            _referrer != msg.sender
        ) {
            fantaReferral.recordReferral(msg.sender, _referrer);
        }
        if (user.amount > 0) {
            uint256 pending = user
                .amount
                .mul(pool.accFantaPerShare)
                .div(1e12)
                .sub(user.rewardDebt);
            if (pending > 0) {
                safeFantaTransfer(msg.sender, pending);
                payReferralCommission(msg.sender, pending);
            }
        }
        if (_amount > 0) {
            pool.lpToken.safeTransferFrom(
                address(msg.sender),
                address(this),
                _amount
            );
            if (address(pool.lpToken) == address(fanta)) {
                uint256 transferTax = _amount.mul(fanta.transferTaxRate()).div(
                    10000
                );
                _amount = _amount.sub(transferTax);
            }
            if (pool.depositFeeBP > 0) {
                uint256 depositFee = _amount.mul(pool.depositFeeBP).div(10000);
                pool.lpToken.safeTransfer(feeAddress, depositFee);
                user.amount = user.amount.add(_amount).sub(depositFee);
            } else {
                user.amount = user.amount.add(_amount);
            }
        }
        user.rewardDebt = user.amount.mul(pool.accFantaPerShare).div(1e12);
        emit Deposit(msg.sender, _pid, _amount);
    }

    // Withdraw LP tokens from MasterChef.
    function withdraw(uint256 _pid, uint256 _amount) public nonReentrant {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        require(user.amount >= _amount, "withdraw: not good");
        updatePool(_pid);
        uint256 pending = user.amount.mul(pool.accFantaPerShare).div(1e12).sub(
            user.rewardDebt
        );
        if (pending > 0) {
            safeFantaTransfer(msg.sender, pending);
            payReferralCommission(msg.sender, pending);
        }
        if (_amount > 0) {
            user.amount = user.amount.sub(_amount);
            pool.lpToken.safeTransfer(address(msg.sender), _amount);
        }
        user.rewardDebt = user.amount.mul(pool.accFantaPerShare).div(1e12);
        emit Withdraw(msg.sender, _pid, _amount);
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) public nonReentrant {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        uint256 amount = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;
        pool.lpToken.safeTransfer(address(msg.sender), amount);
        emit EmergencyWithdraw(msg.sender, _pid, amount);
    }

    // Safe fanta transfer function, just in case if rounding error causes pool to not have enough FANTAs.
    function safeFantaTransfer(address _to, uint256 _amount) internal {
        uint256 fantaBal = fanta.balanceOf(address(this));
        bool transferSuccess = false;
        if (_amount > fantaBal) {
            transferSuccess = fanta.transfer(_to, fantaBal);
        } else {
            transferSuccess = fanta.transfer(_to, _amount);
        }
        require(transferSuccess, "safeFantaTransfer: Transfer failed");
    }

    // Update dev address by the previous dev.
    function setDevAddress(address _devAddress) public {
        require(msg.sender == devAddress, "setDevAddress: FORBIDDEN");
        devAddress = _devAddress;
    }

    function setFeeAddress(address _feeAddress) public {
        require(msg.sender == feeAddress, "setFeeAddress: FORBIDDEN");
        feeAddress = _feeAddress;
    }

    function updateEmissionRate(uint256 _newEmissionRate) public onlyOwner {
        massUpdatePools();
        fantaPerBlock = _newEmissionRate;
    }

    function updateStartBlock(uint256 _newStartBlock) public onlyOwner {
        require(
            block.number > startBlock,
            "Farms have already started, cannot change startBlock"
        );
        startBlock = _newStartBlock;
    }

    // Update the fanta referral contract address by the owner
    function setReferral(IFantaReferral _fantaReferral) public onlyOwner {
        fantaReferral = _fantaReferral;
    }

    // Update referral commission rate by the owner
    function setReferralCommissionRate(uint16 _referralCommissionRate)
        public
        onlyOwner
    {
        require(
            _referralCommissionRate <= MAXIMUM_REFERRAL_COMMISSION_RATE,
            "setReferralCommissionRate: invalid referral commission rate basis points"
        );
        referralCommissionRate = _referralCommissionRate;
    }

    // Pay referral commission to the referrer who referred this user.
    function payReferralCommission(address _user, uint256 _pending) internal {
        if (
            address(fantaReferral) != address(0) && referralCommissionRate > 0
        ) {
            address referrer = fantaReferral.getReferrer(_user);
            uint256 commissionAmount = _pending.mul(referralCommissionRate).div(
                10000
            );

            if (referrer != address(0) && commissionAmount > 0) {
                fanta.mint(referrer, commissionAmount);
                emit ReferralCommissionPaid(_user, referrer, commissionAmount);
            }
        }
    }
}

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Contract ABI

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FantaToken","name":"_fanta","type":"address"},{"internalType":"uint256","name":"_startBlock","type":"uint256"},{"internalType":"uint256","name":"_emissionRate","type":"uint256"},{"internalType":"uint256","name":"_maxSupply","type":"uint256"},{"internalType":"uint16","name":"_referralRate","type":"uint16"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"EmergencyWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"referrer","type":"address"},{"indexed":false,"internalType":"uint256","name":"commissionAmount","type":"uint256"}],"name":"ReferralCommissionPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"BONUS_MULTIPLIER","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAXIMUM_REFERRAL_COMMISSION_RATE","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_TOKEN_SUPPLY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_allocPoint","type":"uint256"},{"internalType":"contract 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IFantaReferral","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feeAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_from","type":"uint256"},{"internalType":"uint256","name":"_to","type":"uint256"}],"name":"getMultiplier","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"massUpdatePools","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"pendingFanta","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"poolInfo","outputs":[{"internalType":"contract IBEP20","name":"lpToken","type":"address"},{"internalType":"uint256","name":"allocPoint","type":"uint256"},{"internalType":"uint256","name":"lastRewardBlock","type":"uint256"},{"internalType":"uint256","name":"accFantaPerShare","type":"uint256"},{"internalType":"uint16","name":"depositFeeBP","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"poolLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"referralCommissionRate","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_allocPoint","type":"uint256"},{"internalType":"uint16","name":"_depositFeeBP","type":"uint16"},{"internalType":"bool","name":"_withUpdate","type":"bool"}],"name":"set","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_devAddress","type":"address"}],"name":"setDevAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_feeAddress","type":"address"}],"name":"setFeeAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract 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Contract Creation Code

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000899175a3a3e579a4c19dd0377b39f1f645f077a300000000000000000000000000000000000000000000000000000000021c438d000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000007d000000000000000000000000000000000000000000000000000000000000001f4

-----Decoded View---------------
Arg [0] : _fanta (address): 0x899175a3A3e579A4c19DD0377b39F1F645F077a3
Arg [1] : _startBlock (uint256): 35406733
Arg [2] : _emissionRate (uint256): 1
Arg [3] : _maxSupply (uint256): 2000
Arg [4] : _referralRate (uint16): 500

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000899175a3a3e579a4c19dd0377b39f1f645f077a3
Arg [1] : 00000000000000000000000000000000000000000000000000000000021c438d
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [3] : 00000000000000000000000000000000000000000000000000000000000007d0
Arg [4] : 00000000000000000000000000000000000000000000000000000000000001f4

Deployed Bytecode Sourcemap

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Swarm Source

ipfs://4b3d8c0f2a50d2469a5adc9393331cdf3bd6dc63c434f42870d1a216d39fd7db

Block		Transaction	Gas Used	Reward

view all blocks produced

Block		Uncle Number	Difficulty	Gas Used	Reward

View All Uncles

Validator Index	Block		Amount

View All Withdrawals

Transaction Hash	Block		Value	Eth2 PubKey	Valid

View All Deposits

Multichain Portfolio | 25 Chains

Display all chains •

Last updated: less than 1 sec ago

Chain	Token	Portfolio %	Price	Amount	Value
FTM	Bitcoin (BTC)	57.80%	$60,493	0.00032645	$19.75
FTM	Ethereum (ETH)	22.76%	$2,451.05	0.00317183	$7.77
FTM	Wrapped Fantom (WFTM)	17.23%	$0.501779	11.7312	$5.89
FTM	SpookyToken (BOO)	2.21%	$1.05	0.72	$0.7545

A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.

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