//address token 0xf8f0bA8CCACdD45dAD6f04cc775ac0FB069eF000
// SPDX-License-Identifier: MIT
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";



/////////////////////////////////////////////////////////////////////Safe Math Library Smart Contract////////////////////////////////////////////////////////////////////////////////////////////////////////


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;
    }
}

/////////////////////////////////////////////////////////////////////Genisis_Shards Staking Contract Start////////////////////////////////////////////////////////////////////////////////////////////////////////



contract GS_AccessPool {
    using SafeMath for uint256;


    address public owner ;


    address public admin=0x0c3c52CeA1f315b1544d0dD72f46d8EbD2C2BAC9 ;        //change the admin acc        

    IERC20 public GSContractAddress = IERC20(0xe0B9a2C3E9f40CF74B2C7F591B2b0CCa055c3112); //gs token contract bsc
    
    IERC20 public GSKContractAddress = IERC20(0x2ec76424f62CEb8403fc6729D0C807Dde71E3303);  //gsk token contract bsc


    //original gs token address 0xe0b9a2c3e9f40cf74b2c7f591b2b0cca055c3112 on eth
    

    
    uint256 public APR = 3805;                                    // Actual value
    uint256 public APR_ACCURACY_RATIO = 1000000000000 ;

    
    bool stopContract = false ;
      

    uint256 public deployTime = now;
  
   
    struct Stake{
        address user;//address of the user
        uint256 amount;//total amount currently the user has staked
        uint256 since; // time at which the user has
        uint256 claimed;  // already claimed by the user
        uint256 claimable;// This claimable field is new and used to tell how big of a reward is currently available
    }
    
    mapping(address=>Stake) private stakers;
    
    uint256 public totalGenisis_ShardsStaked ;           // Total Genisis_Shards Staked
    
    mapping(address => bool) public isStaking;
     
    //////////////////////////////////////////////////////////////////////////////EVENT DECLERATION//////////////////////////////////////////////////////////////////////////////////////////////////////
    
      event Staked(address indexed _from, uint256 _value);
      
      event ClaimedReward(address indexed _from, uint256 _value);

      event UnStaked(address indexed _from, uint256 _value);
      
      
      event ClaimAndWithdraw(address indexed _from, uint256 _value);

      event OwnershipTransferred(address _owner,address newOwner);
 
    
     //////////////////////////////////////////////////////////////////////////////Constructor Function///////////////////////////////////////////////////////////////////////////////////////////////////
     

     
      constructor() public {

        owner  = msg.sender;

    }


//////////////////////////////////////////////////////////////////////////////////////Modifier Definitations////////////////////////////////////////////////////////////////////////////////////////////



    
    modifier onlyOwner {
        require (msg.sender == owner , 'Only owner has right to execute this function');
        _;
        
    }
    
    modifier currentlyStaked {
        require (isStaking [msg.sender] == true , 'Only staked user has right to execute this function');
        _;
        
    }

    modifier poolStatus {
        require (stopContract == false , 'Only when the pool is running user has right to execute this function');
        _;
        
    }
    
    

//////////////////////////////////////////////////////////////////////////////////////Staking Function//////////////////////////////////////////////////////////////////////////////////////////////////



    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        owner = newOwner;
        emit OwnershipTransferred(owner, newOwner);
        
    }

     function stakeTokens(uint256 _amount) external poolStatus {
       require(IERC20(GSContractAddress).transferFrom(msg.sender, address(this), _amount));
       totalGenisis_ShardsStaked=totalGenisis_ShardsStaked.add(_amount);

       if (isStaking[msg.sender] == false)
       {
           stakers[msg.sender]=Stake(msg.sender,_amount,now,stakers[msg.sender].claimed,0);
           isStaking[msg.sender] = true;
           
       }
       else
       {
           uint256 totalReward=_calculateReward(stakers[msg.sender]);
           uint256 totalAmount=stakers[msg.sender].amount.add(_amount);
           stakers[msg.sender]=Stake(msg.sender,totalAmount,now,stakers[msg.sender].claimed,totalReward);
       }

         emit Staked(msg.sender, _amount);
    }
    
    
    //////////////////////////////////////////////////////////////////////////////////////Reward Generation Function //////////////////////////////////////////////////////////////////////////////////////////////////
    
    function _calculateReward(Stake memory _currentUser) internal view returns(uint256) {
        
        uint256 totalTime=now.sub(_currentUser.since);
        uint256 reward=_currentUser.amount.mul(totalTime).mul(APR).div(APR_ACCURACY_RATIO);
        uint256 totalReward=_currentUser.claimable.add(reward);
        return totalReward;
    }


    /////////////////////////////////////////////////////////////////Claim Rewards///////////////////////////////////////////////////////////////////////////////////////////////
    function claimReward() external currentlyStaked poolStatus  {

        uint256 reward=_calculateReward(stakers[msg.sender]);
        stakers[msg.sender].since=now;
        stakers[msg.sender].claimable=0;
        stakers[msg.sender].claimed=stakers[msg.sender].claimed+reward;
        require(IERC20(GSKContractAddress).transferFrom(admin, msg.sender, reward));
        
        emit ClaimedReward(msg.sender, reward);

        
    }


      //////////////////////////////////////////////////Claim and Withdraw All  /////////////////////////////////////////////////////////////////////////////////////////////////////////////
      function claimAndWithdrawAll() external currentlyStaked poolStatus {
        
      
        // Fetch staking balance
        uint256 balance = stakers[msg.sender].amount;
        
        // Fetch Reward balance
        uint256 totalReward = _calculateReward(stakers[msg.sender]);

        // Require amount greater than 0
        require((balance+totalReward > 0 ) , "staking balance cannot be 0 ");
        
        
        totalGenisis_ShardsStaked=totalGenisis_ShardsStaked.sub(balance);
         
        stakers[msg.sender]=Stake(msg.sender,0,0,stakers[msg.sender].claimed+totalReward,0);

        // Update staking status
        isStaking[msg.sender] = false;
        
        if(totalReward==0)
        {
            require(IERC20(GSContractAddress).transfer(msg.sender,balance));
        
        }
        else if(balance==0)
        {
            require(IERC20(GSKContractAddress).transferFrom(admin, msg.sender, totalReward));
        
        }
        else
        {
            require(IERC20(GSContractAddress).transfer(msg.sender,balance));
            require(IERC20(GSKContractAddress).transferFrom(admin, msg.sender, totalReward));
        }
                
         emit ClaimAndWithdraw(msg.sender, totalReward);
         
    } 
    
  
      

    
     //////////////////////////////////////////////////////////////////////////////////////Unstaking the GS Tokens Function //////////////////////////////////////////////////////////////////////////////////////////////////
    
    
    // Unstaking Tokens (Withdraw)
    function unstakeTokens(uint _amount) external currentlyStaked poolStatus {
        
        
        
        // Fetch staking balance
        uint256 balance = stakers[msg.sender].amount;


        require((balance>= _amount ) , "unstaking balance cannot be more");

        
           uint256 totalReward=_calculateReward(stakers[msg.sender]);
           uint256 totalAmount=balance.sub(_amount);
           stakers[msg.sender]=Stake(msg.sender,totalAmount,now,stakers[msg.sender].claimed,totalReward);

           
           totalGenisis_ShardsStaked=totalGenisis_ShardsStaked.sub(_amount);

        require(IERC20(GSContractAddress).transfer(msg.sender,_amount));
 
         emit UnStaked(msg.sender, _amount);
    } 
    
    
    
    
    ///////////////////////////////////////////////////////////////////staking Information functions/////////////////////////////////////////////////////////////////////////////////////////////////
     function stakeInfo_totalAmount() external view returns(uint256){
       
        require(msg.sender!=address(0) , "Invalid Address");
               
         Stake memory currentUser=stakers[msg.sender];
       
       uint256 totalAmount=stakers[msg.sender].amount.add(_calculateReward(currentUser));
        return totalAmount;
    
         

    }
    
     function stakeInfo_totalBalance() external view returns(uint256){
         
        require(msg.sender!=address(0) , "Invalid Address");
        return stakers[msg.sender].amount;
        
    }
    
    function stakeInfo_totalClaimed() external view returns(uint256){
         
        require(msg.sender!=address(0) , "Invalid Address");
        return stakers[msg.sender].claimed;
        
    }
    
    
    function stakeInfo_totalReward() external view returns(uint256){
       
      require(msg.sender!=address(0) , "Invalid Address");
          
      Stake memory currentUser=stakers[msg.sender];
      uint256 totalReward=_calculateReward(currentUser);
      return totalReward;
       
         

    }
      

   
       ///////////////////////////////////////////////////////////////////Implement Circuit Breaker Start///////////////////////////////////////////////////////////////////////////////////////////////// 
    

    function stopPoolContractInEmergencySituation() external onlyOwner {
        
        require(stopContract == false , 'Contract has been already stoped in Emergency Situation') ;
        
        stopContract = true ;
        
    }
    
    
 

    function startPoolContractAfterEmergencySituationEnds() external onlyOwner {
        
        require(stopContract == true , 'Contract is already running ') ;
        
        stopContract = false ;
        
    }
    

  
}

// 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);
}

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