Contract 0x052e566a25ace8934dcc52c41a27b04a7c7eccbe

 
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0xe6728df21b455c84aef4fe7b6efb0520a5fff11df79a2f48e167343bbf1660be84611932021-06-20 12:35:447 hrs 10 mins ago0x9725cc9a1e4a814b8b0b8981adfc0484b6a6eb74 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x21c1556724b2d8f6d46eaddb5375ba1c1e968ea0d1353e01afbac38f4b582fbf84411502021-06-19 19:52:0723 hrs 54 mins ago0x68a8fb23e6fe18d29da22929c75be33e43bd81b3 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xb6c1d7731d65824ce3064fba9e17afb9d8ff51eefd85f2c345b7ccea24aadfae84331912021-06-19 13:09:121 day 6 hrs ago0x9725cc9a1e4a814b8b0b8981adfc0484b6a6eb74 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xf3832bdceff6fb57437758635685b43ababc8a3c0d53c0ba28c99e5a3ac0d3c484185052021-06-19 0:49:151 day 18 hrs ago0x2303fd39e04cf4d6471df5ee945bd0e2cfb6c7a2 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x1d7825b93cbedb9e4ecff4db459a42fc9e4382466ba18973a3ad9366c01a1b4e84183102021-06-19 0:39:301 day 19 hrs ago0x2afa5c040873c1181bd3713f7906e2fc325c25d2 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x453585fdf1713a47c94b23c1bd0fe83b6c664f3c80605e50dcc1a82ba0d75fdf84067202021-06-18 14:53:162 days 4 hrs ago0x37b917a3670dffba2441ee1773ef9af6257a7d45 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x1a5533b018d62b88bc60f7918ba3779d6b5e3d74a7301ca87ebf5f9504f61a1b83422682021-06-16 8:43:584 days 11 hrs ago0x7dd6af227362f4115e060f39c00791ffcf4230d8 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xd0ee76f42257f0e1db54d6c89cef3f632cca5cbd3ee964595714d93b9e0f9ee183244182021-06-15 17:43:295 days 2 hrs ago0x5a7931ad3d97581743bd755736472370b7794edf IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xa59823ed35db3ec1afaaef274fee847a29523722838b27003616477e1c783e3083219862021-06-15 15:41:395 days 4 hrs ago0x1d47a34e8f854cb6a5383fa516702b293cff69f6 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x1ab6a3b162969a067e63d4e1c49414901060bceede574a1fe275c36b7d03e7af83206992021-06-15 14:35:045 days 5 hrs ago0xc9500e5746e15eddd46e0d45115d913694169c27 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x4412d5bae75ac4fbf248b9748bb6eb6a094760502b1aef6e17f30f025456152483201232021-06-15 14:06:145 days 5 hrs ago0x92b7d416c68a700901e6c5e6cecd8f024f7022a3 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x70422bc60edacbca24e73873d0cd07d7e2f11f344a67eb90eb9b2e3cd2acde2583053682021-06-15 1:36:205 days 18 hrs ago0x3b2cf9e51c2df1e9fedec2caa48a4e3776adc6c8 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x0acf89e7863bf0ebf7ab07cbce7ed96c7f6d1c009c230f84f33bde1e0a1e48a582971312021-06-14 18:36:176 days 1 hr ago0x6f5bf5870dcf6386b8867017a3ba2715c074e7c4 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xcef0fa6b4b4cf5a983f7ac0621cc0766ad80b602f2a80ad343aa126b053bdf0d82784552021-06-14 2:53:186 days 16 hrs ago0xeb363f2e1baacaf5c032a7a046d6ac5a49d22371 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xb8c5eb6f66837fb10da18a8a0cec10b4465f0d2ec73a08c094054e4e2af2bf5182441742021-06-12 21:58:367 days 21 hrs ago0x6b4fe7ccf9697c39b95f58331670d3ce90c38330 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000125565
0xd3d0dcce69f21655c4e6daa7bc712e9e7fea587ca20254a0690f15e900f7c56e82441662021-06-12 21:58:127 days 21 hrs ago0x6b4fe7ccf9697c39b95f58331670d3ce90c38330 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xba822dcfcf848eeac54b3b82b0c47518cd3bc21c22d89f0bc57678b88f410bd182389492021-06-12 17:33:588 days 2 hrs ago0x4919b261dc6466e41b405de5b3526f28740c6406 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
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0x71fa79704599ca7ebf9d2755cb84c5b380b137ac378c8e4b43c1442911f1b29682026422021-06-11 11:12:579 days 8 hrs ago0x36bc0479ad497f867394adc3f31156ef83460619 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x0659f1ae3a0b4d49ba2dbc4394ca668b59633b24e444f264db53bb86fc3ff78281953442021-06-11 5:07:139 days 14 hrs ago0x41614ea7b62898cbde075cbf51acb54f0cb3eb2b IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x4c3377283e8db49e62f8b9d92c860aa3182637dca1b1dd6f45e0b682a14e5c6a81904352021-06-11 1:01:259 days 18 hrs ago0x4919b261dc6466e41b405de5b3526f28740c6406 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xb335522ba9dea4b344b87903347f231fd2e7823d9293fb8ac3daeeb7557f515481892372021-06-11 0:01:109 days 19 hrs ago0x6e4a483e592fa2f317118e72dab58b208c747fae IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x060db13b29cc383b8e410dc4573fa68fabd6ca9925cfdb7627a10b76b6cb6f7981723162021-06-10 9:50:3210 days 9 hrs ago0xf3413739b8e8c517b46f1a4a7ce517455bda8611 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0xccde958d8cdd50715b3538b05b63968cd2741f6d63e5365bb3423cb6f5d1200781644712021-06-10 3:16:4210 days 16 hrs ago0x34aba1b8ed225977e277fe904eb900297ca30cee IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
0x678d958a20ddf291c8d2389414b9372870f707e0bb690b3f4034a78b87130b7881551802021-06-09 19:30:3311 days 15 mins ago0x7ea13487202775732636a13f3d62fd8f4ebd94a7 IN  0x052e566a25ace8934dcc52c41a27b04a7c7eccbe0 BNB0.000221565
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Contract Source Code Verified (Similar Match)
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x373410A99B64B089DFE16F1088526D399252dacE

Contract Name:
RewardsToken

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2021-04-05
*/

// SPDX-License-Identifier: NONE

pragma solidity 0.7.6;



// Part: OpenZeppelin/[email protected]/Address

/**
 * @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);
            }
        }
    }
}

// Part: OpenZeppelin/[email protected]/Context

/*
 * @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;
    }
}

// Part: OpenZeppelin/[email protected]/IERC20

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}

// Part: OpenZeppelin/[email protected]/Math

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
    }
}

// Part: OpenZeppelin/[email protected]/ReentrancyGuard

/**
 * @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;
    }
}

// Part: OpenZeppelin/[email protected]/SafeMath

/**
 * @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;
    }
}

// Part: OpenZeppelin/[email protected]/Ownable

/**
 * @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;
    }
}

// Part: OpenZeppelin/[email protected]/SafeERC20

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: 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(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: RewardsToken.sol

// LP Token with rewards capability for http://ellipsis.finance/
// ERC20 that represents a deposit into an Ellipsis pool and allows 3rd-party incentives for token holders
// Based on SNX MultiRewards by iamdefinitelyahuman - https://github.com/iamdefinitelyahuman/multi-rewards
contract RewardsToken is ReentrancyGuard, Ownable {

    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    /* ========== STATE VARIABLES ========== */

    string public symbol;
    string public name;
    uint256 public constant decimals = 18;
    uint256 public totalSupply;

    address public lpStaker;
    address public minter;

    struct Reward {
        address rewardsDistributor;
        uint256 rewardsDuration;
        uint256 periodFinish;
        uint256 rewardRate;
        uint256 lastUpdateTime;
        uint256 rewardPerTokenStored;
    }
    mapping(address => Reward) public rewardData;
    address[] public rewardTokens;

    // user -> reward token -> amount
    mapping(address => mapping(address => uint256)) public userRewardPerTokenPaid;
    mapping(address => mapping(address => uint256)) public rewards;

    mapping(address => uint256) public balanceOf;
    mapping(address => uint256) public depositedBalanceOf;

    // owner -> spender -> amount
    mapping(address => mapping(address => uint256)) public allowance;

    /* ========== EVENTS ========== */

    event RewardAdded(uint256 reward);
    event RewardPaid(address indexed user, address indexed rewardsToken, uint256 reward);
    event RewardsDurationUpdated(address token, uint256 newDuration);
    event Recovered(address token, uint256 amount);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /* ========== CONSTRUCTOR ========== */

    constructor(
        string memory _name,
        string memory _symbol,
        address _lpStaker
    )
        public Ownable()
    {
        name = _name;
        symbol = _symbol;
        lpStaker = _lpStaker;
        emit Transfer(address(0), msg.sender, 0);
    }

    /* ========== ADMIN FUNCTIONS ========== */

    function addReward(
        address _rewardsToken,
        address _rewardsDistributor,
        uint256 _rewardsDuration
    )
        public
        onlyOwner
    {
        require(rewardData[_rewardsToken].rewardsDuration == 0);
        rewardTokens.push(_rewardsToken);
        rewardData[_rewardsToken].rewardsDistributor = _rewardsDistributor;
        rewardData[_rewardsToken].rewardsDuration = _rewardsDuration;
    }

    function setRewardsDistributor(address _rewardsToken, address _rewardsDistributor) external onlyOwner {
        rewardData[_rewardsToken].rewardsDistributor = _rewardsDistributor;
    }

    function setMinter(address _minter) external {
        require(minter == address(0));
        minter = _minter;
    }

    /* ========== MODIFIERS ========== */

    modifier updateReward(address payable[2] memory accounts) {
        address _lpStaker = lpStaker;
        for (uint i; i < rewardTokens.length; i++) {
            address token = rewardTokens[i];
            rewardData[token].rewardPerTokenStored = rewardPerToken(token);
            rewardData[token].lastUpdateTime = lastTimeRewardApplicable(token);
            for (uint x = 0; x < accounts.length; x++) {
                address account = accounts[x];
                if (account == address(0)) break;
                if (account == _lpStaker) continue;
                rewards[account][token] = earned(account, token);
                userRewardPerTokenPaid[account][token] = rewardData[token].rewardPerTokenStored;
            }
        }
        _;
    }

    /* ========== VIEWS ========== */

    function lastTimeRewardApplicable(address _rewardsToken) public view returns (uint256) {
        return Math.min(block.timestamp, rewardData[_rewardsToken].periodFinish);
    }

    function rewardPerToken(address _rewardsToken) public view returns (uint256) {
        Reward storage reward = rewardData[_rewardsToken];
        if (totalSupply == 0) {
            return reward.rewardPerTokenStored;
        }
        uint256 last = lastTimeRewardApplicable(_rewardsToken);
        return reward.rewardPerTokenStored.add(
            last.sub(reward.lastUpdateTime).mul(reward.rewardRate).mul(1e18).div(totalSupply)
        );
    }

    function earned(address account, address _rewardsToken) public view returns (uint256) {
        if (account == lpStaker) return 0;
        uint256 balance = balanceOf[account].add(depositedBalanceOf[account]);
        uint256 perToken = rewardPerToken(_rewardsToken).sub(userRewardPerTokenPaid[account][_rewardsToken]);
        return balance.mul(perToken).div(1e18).add(rewards[account][_rewardsToken]);
    }

    function getRewardForDuration(address _rewardsToken) external view returns (uint256) {
        return rewardData[_rewardsToken].rewardRate.mul(rewardData[_rewardsToken].rewardsDuration);
    }

    /* ========== MUTATIVE FUNCTIONS ========== */

    function approve(address _spender, uint256 _value) public returns (bool) {
        allowance[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    /** shared logic for transfer and transferFrom */
    function _transfer(
        address payable _from,
        address payable _to,
        uint256 _value
    )
        internal
        updateReward([_from, _to])
    {
        require(balanceOf[_from] >= _value, "Insufficient balance");
        balanceOf[_from] = balanceOf[_from].sub(_value);
        balanceOf[_to] = balanceOf[_to].add(_value);

        // for transfers into or out of LpTokenStaker, modify depositedBalance
        if (_to == lpStaker) {
            depositedBalanceOf[_from] = depositedBalanceOf[_from].add(_value);
        } else if (_from == lpStaker) {
            depositedBalanceOf[_to] = depositedBalanceOf[_to].sub(_value);
        }
        emit Transfer(_from, _to, _value);
    }

    function transfer(address payable _to, uint256 _value) public returns (bool) {
        _transfer(msg.sender, _to, _value);
        return true;
    }

    function transferFrom(
        address payable _from,
        address payable _to,
        uint256 _value
    )
        public
        returns (bool)
    {
        uint256 allowed = allowance[_from][msg.sender];
        require(allowed >= _value, "Insufficient allowance");
        if (allowed != uint256(-1)) {
            allowance[_from][msg.sender] = allowed.sub(_value);
        }
        _transfer(_from, _to, _value);
        return true;
    }

    function getReward() public nonReentrant updateReward([msg.sender, address(0)]) {
        for (uint i; i < rewardTokens.length; i++) {
            address _rewardsToken = rewardTokens[i];
            uint256 reward = rewards[msg.sender][_rewardsToken];
            if (reward > 0) {
                rewards[msg.sender][_rewardsToken] = 0;
                IERC20(_rewardsToken).safeTransfer(msg.sender, reward);
                emit RewardPaid(msg.sender, _rewardsToken, reward);
            }
        }
    }

    /* ========== RESTRICTED FUNCTIONS ========== */

    function notifyRewardAmount(
        address _rewardsToken,
        uint256 reward
    )
        external
        updateReward([address(0), address(0)])
    {
        require(rewardData[_rewardsToken].rewardsDistributor == msg.sender);
        // handle the transfer of reward tokens via `transferFrom` to reduce the number
        // of transactions required and ensure correctness of the reward amount
        IERC20(_rewardsToken).safeTransferFrom(msg.sender, address(this), reward);

        if (block.timestamp >= rewardData[_rewardsToken].periodFinish) {
            rewardData[_rewardsToken].rewardRate = reward.div(rewardData[_rewardsToken].rewardsDuration);
        } else {
            uint256 remaining = rewardData[_rewardsToken].periodFinish.sub(block.timestamp);
            uint256 leftover = remaining.mul(rewardData[_rewardsToken].rewardRate);
            rewardData[_rewardsToken].rewardRate = reward.add(leftover).div(rewardData[_rewardsToken].rewardsDuration);
        }

        rewardData[_rewardsToken].lastUpdateTime = block.timestamp;
        rewardData[_rewardsToken].periodFinish = block.timestamp.add(rewardData[_rewardsToken].rewardsDuration);
        emit RewardAdded(reward);
    }

    // Added to support recovering LP Rewards from other systems such as BAL to be distributed to holders
    function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner {
        require(rewardData[tokenAddress].lastUpdateTime == 0, "Cannot withdraw reward token");
        IERC20(tokenAddress).safeTransfer(owner(), tokenAmount);
        emit Recovered(tokenAddress, tokenAmount);
    }

    function setRewardsDuration(address _rewardsToken, uint256 _rewardsDuration) external {
        require(
            block.timestamp > rewardData[_rewardsToken].periodFinish,
            "Reward period still active"
        );
        require(rewardData[_rewardsToken].rewardsDistributor == msg.sender);
        require(_rewardsDuration > 0, "Reward duration must be non-zero");
        rewardData[_rewardsToken].rewardsDuration = _rewardsDuration;
        emit RewardsDurationUpdated(_rewardsToken, rewardData[_rewardsToken].rewardsDuration);
    }

    function mint(
        address payable _to,
        uint256 _value
    )
        external
        updateReward([_to, address(0)])
        returns (bool)
    {
        require(msg.sender == minter);
        balanceOf[_to] = balanceOf[_to].add(_value);
        totalSupply = totalSupply.add(_value);
        emit Transfer(address(0), _to, _value);
        return true;
    }

    function burnFrom(
        address payable _to,
        uint256 _value
    )
        external
        updateReward([_to, address(0)])
        returns (bool)
    {
        require(msg.sender == minter);
        balanceOf[_to] = balanceOf[_to].sub(_value);
        totalSupply = totalSupply.sub(_value);
        emit Transfer(_to, address(0), _value);
        return true;
    }
}

Contract ABI

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