Contract 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af3

 

Contract Overview

Balance:
0 ETH

ETH Value:
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0xff3b2f058d078b544f14f81c03fdff2032a778046e8ea25d6b3158647d6ec218Activate By Sign568448052023-01-31 9:19:212 days 5 hrs ago0x16ba7f8cf33fa8049c37a3a46ed39fc4b452f841 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004614
0xe7404c7be923d23a8b632e24e3c3a1a778d0f0ca62be10da9ecd030c517aed41Activate By Sign567150462023-01-30 19:36:532 days 18 hrs ago0x2f5bf48294a40657c3e0b61527141ccbb0db5f98 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00011477
0xfa4068c9e7142615fb0955807b5d0812333c9e16be214b303c6bef650f80733aActivate By Sign566976262023-01-30 18:11:542 days 20 hrs ago0x0b8b29baaebc5811e9871f63152df6f039b99ce8 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00005292
0x142d1d6afdda0beb3160c42c2bf074f20f461d610757770978ff04dea8215d92Activate By Sign566806632023-01-30 16:48:512 days 21 hrs ago0x5ed2b0ba63c6d5a82b91b61b500d58078486348d IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00006432
0xa86c5d121f7e036298f6858a1216b695da8cdfbb8e57f3db4ee434e734f2f0c8Activate By Sign566802782023-01-30 16:47:022 days 21 hrs ago0x4f2e69787ca690ca912656782203662c637e3b43 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00006663
0x0961c62a777e3e7777e9ac235189373afb7c9c91277460dd0b9a5f98f68b4f96Activate By Sign566796592023-01-30 16:44:012 days 21 hrs ago0xd2ca73589bd2637827a8d16cc94860ba21de4fc0 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00006663
0xd472ba59ca355a2e7c66c33716e864c3f6a68759a1c0c096c44bd99bc8b728f0Activate By Sign565027682023-01-30 1:29:483 days 13 hrs ago0x095904cafaa3c1bb339199d148f6edbc8ed11d83 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004633
0xd7f30428b2490d983183f9c5213fe04c71a4c855941c1d24cfb1587f9049cd32Activate By Sign560541242023-01-28 6:13:585 days 8 hrs ago0xbc0246c81051fb45705d2c90b52cfddcafb938d2 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004371
0xe404a3418cefbccda1b9459bab6131649f1a18da212d5b25268aeff2cea494e6Activate By Sign559289682023-01-27 18:12:115 days 20 hrs ago0x7eeed0df9c98754a2b3bb94e0124230e6c1cdf41 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.0000996
0x1cb805bc5e518dc71728abff65cdcfadc83df14c66661f83a6f852c19b0f77e6Activate By Sign558015342023-01-27 7:38:536 days 6 hrs ago0x9c709c02b87072c8599c5416617fd259d334eef2 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004857
0x9cdf62f45c0590e5c412302b77f511eb217f00cae3494fec1a010b63c7ef2ba2Claim Reward557311522023-01-27 0:41:356 days 13 hrs ago0x838f2e76cd04e94638af3d6237f1c1799ea839f4 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00003137
0x0243220eb0ba901370efbe41853400ecf3ad2590e5682a3c81e491e0f8835629Activate By Sign553877102023-01-25 15:13:557 days 23 hrs ago0x70029c4832d5882a61641265ba0013a06b4f76c4 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004296
0x867ae2e1c8f5acc86f82ef4ade4f8d45bae2569a945815a5e5c3b6c157ae7528Activate By Sign552783032023-01-25 3:29:528 days 11 hrs ago0xaf7a7da5b7076390c47934be4d8a5b66cbcda557 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004832
0xa796869aab03af75b3d5b0ece4361059dbd00cc373a717fba96267e1e8b4fbe2Activate By Sign551761752023-01-24 16:54:298 days 21 hrs ago0x3ab1e42d51bced29b32ce9debb36280342443f28 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00005071
0x46d9363cd7db92392b6941b68a7ec1e606fa93e3ea38fe1069a3b96a106d5a17Claim Reward549538312023-01-23 16:20:129 days 22 hrs ago0xdd3f9005e5c045d7515b3beb4ff92fda1df8cd9b IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00010994
0x9118a815af14cfe300e672997d334ddc658a27b8d4e2aa2917fd68e319c52871Activate By Sign548407202023-01-23 3:31:1810 days 11 hrs ago0xd25f3ff4d63179800dce837dc5412dac1ba6133f IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004583
0x2f0d33aabced4e1d11a609396049418fb9e99ca2cce8c85b6b96920db3d3a64dClaim Reward542352472023-01-20 6:53:0213 days 7 hrs ago0x838f2e76cd04e94638af3d6237f1c1799ea839f4 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00002462
0xea79b836677de92b267b4e75306288559abb4075a36cff50ea76a1a60211955aClaim Reward540773122023-01-19 10:52:4514 days 3 hrs ago0xdd3f9005e5c045d7515b3beb4ff92fda1df8cd9b IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00006592
0xbdfd127a7f63be89da95c3ff69995452fe23d2d437f9eaf0fd59d9f5b28fe531Activate By Sign540700962023-01-19 10:06:2014 days 4 hrs ago0x365b4cc37d9ac5380c12618e1d008f868d2b0ef7 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004509
0x49835c5711670befeaee042ef98ef48b87e260b3889faef00f2a36ef3c0f9c15Activate By Sign540687512023-01-19 9:57:5714 days 4 hrs ago0x4db21ad0cc2fa306415f8ba2c518d409a1e4712f IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004196
0xb4ea01b3c37578d492aa75f9b0b4242072ca4d05be60e6b2a66f8644bd50a30aActivate By Sign539513332023-01-18 18:45:3514 days 19 hrs ago0xe6cf807e4b2a640dfe03ff06fa6ab32c334c7df4 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00012473
0x039dfd5883c94f03d4c5c44a5e7d779376201d3c3ab78fe204b8f2e5b52f1587Activate By Sign536468282023-01-17 8:23:0916 days 6 hrs ago0x6125336b74543db8bee622c08d67a7f1259cced5 IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00004656
0x8f63602233bf68e9dc9560ad7d1fccbd571d8c2ceb11b156f090eaea3558f2f9Activate By Sign534833502023-01-16 14:18:3517 days 15 mins ago0x2c1259a2c764dcc66241edfbdfd281afcb6d870a IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00005005
0x49bb87f13dda25d2d4b26bb5051230fda185d2383b1a30488317d12152434536Claim Reward534153102023-01-16 7:36:0217 days 6 hrs ago0xdd3f9005e5c045d7515b3beb4ff92fda1df8cd9b IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00007832
0xf65ba323a6b732ca092682b9a30a3a6455e6a32651de46b5f5327ccf392c2b0cActivate By Sign533665242023-01-16 1:39:5817 days 12 hrs ago0x46d75a67a7c5fa672a8993dfd5655d780b7f296e IN  0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH0.00006222
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0x05dc077ec6deb7b9ba8c3461fcfc30327d1cbd472db4563422e7fd28f456ba67574444282023-02-02 14:13:2620 mins ago 0xa481384653c484901b301634086c8625e550bbec 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH
0xe6b97b19671370b7dd8050dc8f6140bcbe44c257ca6943c933d840f9461c93ae574398392023-02-02 13:49:5844 mins ago 0xa481384653c484901b301634086c8625e550bbec 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH
0x3e1a84512130f151a595de74fff4a87d56143909ee445bf10a17d7e8580458c6574311122023-02-02 13:07:141 hr 26 mins ago 0xa481384653c484901b301634086c8625e550bbec 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH
0x3e1a84512130f151a595de74fff4a87d56143909ee445bf10a17d7e8580458c6574311122023-02-02 13:07:141 hr 26 mins ago 0xa481384653c484901b301634086c8625e550bbec 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH
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0x2acee5d1976d3889aac7b1e716befe8da85a671889b24bf621ffaf20dcccce50573629952023-02-02 7:26:497 hrs 7 mins ago 0xa481384653c484901b301634086c8625e550bbec 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH
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0xc9c97c2e0e040dca6a90d79f91952903ccbcf543c3dd1edc2bf3ffc69946037d573627472023-02-02 7:25:227 hrs 8 mins ago 0xa481384653c484901b301634086c8625e550bbec 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH
0x78c7bf91d6ef24bcff24b07d76e2a1e4ae990f9d8155ef4072e572ea0f1e2bec573612962023-02-02 7:17:187 hrs 16 mins ago 0xa481384653c484901b301634086c8625e550bbec 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH
0x78c7bf91d6ef24bcff24b07d76e2a1e4ae990f9d8155ef4072e572ea0f1e2bec573612962023-02-02 7:17:187 hrs 16 mins ago 0xa481384653c484901b301634086c8625e550bbec 0xefeeb7ecca25d0bbdf97cff60e61802cd8414af30 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
Referral

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 9 : Referral.sol
// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./interfaces/IReferral.sol";

contract Referral is IReferral, Ownable, ReentrancyGuard {
  using SafeMath for uint256;
  using SafeERC20 for IERC20;

  /**
   * @dev The struct of account information.
   * @param referrer The referrer addresss.
   * @param reward Total pending reward of an address.
   * @param accumReward Total claimed reward of an address.
   * @param referredCount The total referral amount of an address.
   * @param activeTime The active timestamp of an address.
   */
  struct Account {
    address referrer;
    uint256 reward;
    uint256 accumReward;
    uint256 referredCount;
    uint256 activeTime;
  }

  event Activate(address referee, address referrer);
  event ClaimReward(address accountAddress, uint256 reward);
  event UpdateReferralReward(address referee, address referrer, uint256 reward);
  event UpdateMasterChef(address masterChef);

  // MasterChef address.
  address public masterChef;
  // OREO token.
  IERC20 public token;
  // Info of each account
  mapping(address => Account) public accounts;
  // Total rewards distributed
  uint256 public totalReward;
  // Total rewards transferred to this contract
  uint256 public totalRewardTransferred;

  bytes32 public DOMAIN_SEPARATOR;
  // keccak256("Activate(address referee,address referrer)")
  bytes32 public constant ACTIVATE_TYPEHASH = 0x4b1fc20d2fd2102f86b90df2c22a6641f5ef4f7fd96d33e36ab9bd6fbad1cf30;

  constructor(address _tokenAddress) public {
    require(
      _tokenAddress != address(0) && _tokenAddress != address(1),
      "Referral::constructor::_tokenAddress must not be address(0) or address(1)"
    );

    token = IERC20(_tokenAddress);

    uint256 chainId;
    assembly {
      chainId := chainid()
    }
    DOMAIN_SEPARATOR = keccak256(
      abi.encode(
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
        keccak256("Referral"),
        keccak256("1"),
        chainId,
        address(this)
      )
    );
  }

  // Only MasterChef can continue the execution
  modifier onlyMasterChef() {
    require(msg.sender == masterChef, "only masterChef");
    _;
  }

  // Update MasterChef address
  function setMasterChef(address _masterChef) public override onlyOwner {
    require(_masterChef != address(0), "invalid _masterChef");

    masterChef = _masterChef;
    emit UpdateMasterChef(_masterChef);
  }

  // Activates sender
  function activate(address referrer) external override {
    _activate(msg.sender, referrer);
  }

  // Delegates activates from signatory to `referee`
  function activateBySign(
    address referee,
    address referrer,
    uint8 v,
    bytes32 r,
    bytes32 s
  ) external override {
    bytes32 digest = keccak256(
      abi.encodePacked("\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(ACTIVATE_TYPEHASH, referee, referrer)))
    );
    address signer = ecrecover(digest, v, r, s);
    require(signer == referee, "invalid signature");

    _activate(referee, referrer);
  }

  // Internal function to activate `referee`
  function _activate(address referee, address referrer) internal {
    require(referee != address(0), "invalid referee");
    require(referee != referrer, "referee = referrer");
    require(accounts[referee].activeTime == 0, "referee account have been activated");
    if (referrer != address(0)) {
      require(accounts[referrer].activeTime > 0, "referrer account is not activated");
    }

    accounts[referee].referrer = referrer;
    accounts[referee].activeTime = block.timestamp;
    if (referrer != address(0)) {
      accounts[referrer].referredCount = accounts[referrer].referredCount.add(1);
    }

    emit Activate(referee, referrer);
  }

  // Function for check whether an address has activated
  function isActivated(address _address) public view override returns (bool) {
    return accounts[_address].activeTime > 0;
  }

  // Function for letting some observer call when some conditions met
  // Currently, the caller will MasterChef after transferring the OREO reward
  function updateReferralReward(address accountAddress, uint256 reward) external override onlyMasterChef {
    totalRewardTransferred = totalRewardTransferred.add(reward);
    if (accounts[accountAddress].referrer != address(0)) {
      Account storage referrerAccount = accounts[accounts[accountAddress].referrer];
      referrerAccount.reward = referrerAccount.reward.add(reward);
      totalReward = totalReward.add(reward);

      emit UpdateReferralReward(accountAddress, accounts[accountAddress].referrer, reward);
    }
  }

  // Claim OREO earned
  function claimReward() external override nonReentrant {
    require(accounts[msg.sender].activeTime > 0, "account is not activated");
    require(accounts[msg.sender].reward > 0, "reward amount = 0");

    Account storage account = accounts[msg.sender];
    uint256 pendingReward = account.reward;
    account.reward = account.reward.sub(pendingReward);
    account.accumReward = account.accumReward.add(pendingReward);
    token.safeTransfer(address(msg.sender), pendingReward);

    emit ClaimReward(msg.sender, pendingReward);
  }
}

File 2 of 9 : SafeMath.sol
// SPDX-License-Identifier: MIT

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 3 of 9 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @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 4 of 9 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT

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 5 of 9 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../utils/Context.sol";
/**
 * @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 6 of 9 : IReferral.sol
// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.6.12;

interface IReferral {
  function setMasterChef(address _masterChef) external;

  function activate(address referrer) external;

  function activateBySign(
    address referee,
    address referrer,
    uint8 v,
    bytes32 r,
    bytes32 s
  ) external;

  function isActivated(address _address) external view returns (bool);

  function updateReferralReward(address accountAddress, uint256 reward) external;

  function claimReward() external;
}

File 7 of 9 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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);
}

File 8 of 9 : Address.sol
// SPDX-License-Identifier: MIT

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 9 of 9 : Context.sol
// SPDX-License-Identifier: MIT

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;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"_tokenAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"referee","type":"address"},{"indexed":false,"internalType":"address","name":"referrer","type":"address"}],"name":"Activate","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"accountAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"ClaimReward","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":false,"internalType":"address","name":"masterChef","type":"address"}],"name":"UpdateMasterChef","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"referee","type":"address"},{"indexed":false,"internalType":"address","name":"referrer","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"UpdateReferralReward","type":"event"},{"inputs":[],"name":"ACTIVATE_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"accounts","outputs":[{"internalType":"address","name":"referrer","type":"address"},{"internalType":"uint256","name":"reward","type":"uint256"},{"internalType":"uint256","name":"accumReward","type":"uint256"},{"internalType":"uint256","name":"referredCount","type":"uint256"},{"internalType":"uint256","name":"activeTime","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"referrer","type":"address"}],"name":"activate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"referee","type":"address"},{"internalType":"address","name":"referrer","type":"address"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"activateBySign","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_address","type":"address"}],"name":"isActivated","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"masterChef","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_masterChef","type":"address"}],"name":"setMasterChef","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalRewardTransferred","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"accountAddress","type":"address"},{"internalType":"uint256","name":"reward","type":"uint256"}],"name":"updateReferralReward","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

000000000000000000000000319e222de462ac959baf2aec848697aec2bbd770

-----Decoded View---------------
Arg [0] : _tokenAddress (address): 0x319e222de462ac959baf2aec848697aec2bbd770

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000319e222de462ac959baf2aec848697aec2bbd770


Block Transaction Gas Used Reward
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