// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

/**
 * @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 in 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");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        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);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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);
}

pragma solidity ^0.6.0;

contract IInvitation {

    function getInviter(address invitee) public view returns (address inviter){}
    function setInviter(address invitee , address inviter) public{}

}

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "./IERC20.sol";
import "./SafeMath.sol";
import "./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");
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @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, 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) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * 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);
        uint256 c = a - b;

        return c;
    }

    /**
     * @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) {
        // 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 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts 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) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts 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) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "./IERC20.sol";
import "./SafeERC20.sol";
import "./SafeMath.sol";
import './IInvitation.sol';
// Note that this pool has no minter key of ibac (rewards).
// Instead, the governance will call ibac.distributeReward and send reward to this pool at the beginning.
contract StablesPool {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;
    address internal team = 0x3a0910E373aa1845E439f7009326A17F4b612965; 
    address internal government = 0x4C0b98cF1761425A6a23a16cC1bD5c51C1638703; 
    address internal insurance  = 0xaa5de6aD842b4eB26b85511e3f4A85DAFBd5fD68; 
    address public governance;

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

    // Info of each pool.
    struct PoolInfo {
        IERC20 lpToken; // Address of LP token contract.
        uint256 lastRewardBlock; // Last block number that ibacs distribution occurs.
        uint256 accibacPerShare; // Accumulated ibacs per share, times 1e18. See below.
    }

    // The ibac TOKEN!
    IERC20 public ibac;

    IInvitation public invitation;

    // Info of each pool.
    PoolInfo[] public poolInfo;

    // Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;

    uint256 public startBlock;

    uint256 public poolLength = 5; // DAI, USDC, USDT, BUSD, yCRV

    uint256 public constant BLOCKS_PER_WEEK = 46500;

    uint256[] public epochTotalRewards = [40000 ether, 40000 ether, 60000 ether, 60000 ether];

    // Block number when each epoch ends.
    uint[4] public epochEndBlocks;

    // Reward per block for each of 4 epochs (last item is equal to 0 - for sanity).
    uint[5] public epochibacPerBlock;

    event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
    event RewardPaid(address indexed user, uint256 amount);
    event InvitationReward(address indexed user, uint8 indexed lv, uint256 amount);

    constructor(
        address _ibac,
        uint256 _startBlock,
        address[] memory _lpTokens,
        address _invitation
    ) public {
        // require(block.number < _startBlock, "late");
        if (_ibac != address(0)) ibac = IERC20(_ibac);
        if (_invitation != address(0)) invitation = IInvitation(_invitation);
        startBlock = _startBlock; // supposed to be 11,465,000 (Wed Dec 16 2020 15:00:00 UTC)
        epochEndBlocks[0] = startBlock + BLOCKS_PER_WEEK;
        uint256 i;
        for (i = 1; i <= 3; ++i) {
            epochEndBlocks[i] = epochEndBlocks[i - 1] + BLOCKS_PER_WEEK;
        }
        for (i = 0; i <= 3; ++i) {
            epochibacPerBlock[i] = epochTotalRewards[i].div(BLOCKS_PER_WEEK);
        }
        epochibacPerBlock[4] = 0;
        if (_lpTokens.length == 0) {
            _addPool(address(0x6B175474E89094C44Da98b954EedeAC495271d0F)); // DAI
            _addPool(address(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48)); // USDC
            _addPool(address(0xdAC17F958D2ee523a2206206994597C13D831ec7)); // USDT
            _addPool(address(0x57Ab1E02fEE23774580C119740129eAC7081e9D3)); // SUSD
            _addPool(address(0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8)); // yCRV
        } else {
            require(_lpTokens.length == poolLength, "Need exactly 5 lpToken address");
            for (i = 0; i < poolLength; ++i) {
                _addPool(_lpTokens[i]);
            }
        }
    }

    // Add a new lp to the pool. Called in the constructor only.
    function _addPool(address _lpToken) internal {
        require(_lpToken != address(0), "!_lpToken");
        poolInfo.push(
            PoolInfo({
            lpToken : IERC20(_lpToken),
            lastRewardBlock : startBlock,
            accibacPerShare : 0
            })
        );
    }

    // Return reward multiplier over the given _from to _to block.
    function getGeneratedReward(uint256 _from, uint256 _to) public view returns (uint256) {
        for (uint8 epochId = 4; epochId >= 1; --epochId) {
            if (_to >= epochEndBlocks[epochId - 1]) {
                if (_from >= epochEndBlocks[epochId - 1]) return _to.sub(_from).mul(epochibacPerBlock[epochId]);
                uint256 _generatedReward = _to.sub(epochEndBlocks[epochId - 1]).mul(epochibacPerBlock[epochId]);
                if (epochId == 1) return _generatedReward.add(epochEndBlocks[0].sub(_from).mul(epochibacPerBlock[0]));
                for (epochId = epochId - 1; epochId >= 1; --epochId) {
                    if (_from >= epochEndBlocks[epochId - 1]) return _generatedReward.add(epochEndBlocks[epochId].sub(_from).mul(epochibacPerBlock[epochId]));
                    _generatedReward = _generatedReward.add(epochEndBlocks[epochId].sub(epochEndBlocks[epochId - 1]).mul(epochibacPerBlock[epochId]));
                }
                return _generatedReward.add(epochEndBlocks[0].sub(_from).mul(epochibacPerBlock[0]));
            }
        }
        return _to.sub(_from).mul(epochibacPerBlock[0]);
    }

    // View function to see pending ibacs on frontend.
    function pendingiBasisDollar(uint256 _pid, address _user) external view returns (uint256) {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accibacPerShare = pool.accibacPerShare;
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (block.number > pool.lastRewardBlock && lpSupply != 0) {
            uint256 _generatedReward = getGeneratedReward(pool.lastRewardBlock, block.number);
            accibacPerShare = accibacPerShare.add(_generatedReward.div(poolLength).mul(1e18).div(lpSupply));
        }
        return user.amount.mul(accibacPerShare).div(1e18).sub(user.rewardDebt);
    }

    // Update reward variables of the given pool to be up-to-date.
    function updatePool(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        if (block.number <= pool.lastRewardBlock) {
            return;
        }
        uint256 lpSupply = pool.lpToken.balanceOf(address(this));
        if (lpSupply == 0) {
            pool.lastRewardBlock = block.number;
            return;
        }
        uint256 _generatedReward = getGeneratedReward(pool.lastRewardBlock, block.number);
        pool.accibacPerShare = pool.accibacPerShare.add(_generatedReward.div(poolLength).mul(1e18).div(lpSupply));
        pool.lastRewardBlock = block.number;
    }

    // Deposit by Invitee.
    function depositByInvitee(uint256 _pid, uint256 _amount,address inviter) public {
        address inviter2 = invitation.getInviter(inviter);
        if(inviter2 !=address(0)){
            invitation.setInviter(msg.sender,inviter);
         }else{  // If your inviter did not deposit.
            invitation.setInviter(msg.sender,address(1));
         }
        address _sender = msg.sender;
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_sender];
        updatePool(_pid);
        if (user.amount > 0) {
            uint256 _pending = user.amount.mul(pool.accibacPerShare).div(1e18).sub(user.rewardDebt);
            if (_pending > 0) {
                safeibacTransfer(_sender, _pending);
                emit RewardPaid(_sender, _pending);
            }
        }
        if (_amount > 0) {
            pool.lpToken.safeTransferFrom(_sender, address(this), _amount);
            user.amount = user.amount.add(_amount);
        }
        user.rewardDebt = user.amount.mul(pool.accibacPerShare).div(1e18);
        emit Deposit(_sender, _pid, _amount);
    }

    // Deposit .
    function deposit(uint256 _pid, uint256 _amount) public {
        address inviter = invitation.getInviter(msg.sender);
        if(inviter == address(0)) invitation.setInviter(msg.sender,address(1));
        address _sender = msg.sender;
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_sender];
        updatePool(_pid);
        if (user.amount > 0) {
            uint256 _pending = user.amount.mul(pool.accibacPerShare).div(1e18).sub(user.rewardDebt);
            if (_pending > 0) {
                safeibacTransfer(_sender, _pending);
                emit RewardPaid(_sender, _pending);
            }
        }
        if (_amount > 0) {
            pool.lpToken.safeTransferFrom(_sender, address(this), _amount);
            user.amount = user.amount.add(_amount);
        }
        user.rewardDebt = user.amount.mul(pool.accibacPerShare).div(1e18);
        emit Deposit(_sender, _pid, _amount);
    }

    // Withdraw LP tokens.
    function withdraw(uint256 _pid, uint256 _amount) public {
        address _sender = msg.sender;
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_sender];
        require(user.amount >= _amount, "withdraw: not good");
        updatePool(_pid);
        uint256 _pending = user.amount.mul(pool.accibacPerShare).div(1e18).sub(user.rewardDebt);
        if (_pending > 0) {
            safeibacTransfer(_sender, _pending);
            emit RewardPaid(_sender, _pending);
        }
        if (_amount > 0) {
            user.amount = user.amount.sub(_amount);
            pool.lpToken.safeTransfer(_sender, _amount.mul(97).div(100));
            pool.lpToken.safeTransfer(team, _amount.mul(3).div(100));
        }
        user.rewardDebt = user.amount.mul(pool.accibacPerShare).div(1e18);
        emit Withdraw(_sender, _pid, _amount);
    }

    // Withdraw without caring about rewards. EMERGENCY ONLY.
    function emergencyWithdraw(uint256 _pid) public {
        PoolInfo storage pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][msg.sender];
        pool.lpToken.safeTransfer(address(msg.sender), user.amount.mul(97).div(100));
        pool.lpToken.safeTransfer(team, user.amount.mul(3).div(100));
        emit EmergencyWithdraw(msg.sender, _pid, user.amount);
        user.amount = 0;
        user.rewardDebt = 0;
    }

    // Safe ibac transfer function, just in case if rounding error causes pool to not have enough ibacs.
    function safeibacTransfer(address _to, uint256 _amount) internal {
        uint256 _ibacBal = ibac.balanceOf(address(this));
        address inviter = invitation.getInviter(_to);
        address inviter2 = invitation.getInviter(inviter);
        if (_ibacBal > 0) {
            uint256 amount = _amount > _ibacBal ? _ibacBal : _amount;
            ibac.transfer(_to, amount); //%100
            tryibacTransfer(team,amount.mul(5).div(100), 0);
            tryibacTransfer(government,amount.mul(3).div(100), 0);
            tryibacTransfer(insurance,amount.mul(2).div(100), 0);
            if(inviter!=address(0) && inviter != address(1)) tryibacTransfer(inviter,amount.mul(2).div(100), 1);
            if(inviter2!=address(0) && inviter2 != address(1)) tryibacTransfer(inviter2,amount.mul(1).div(100), 2);
        }
    } 

    function tryibacTransfer(address _to, uint256 _amount,uint8 lv) internal {
            try 
              ibac.transfer(_to, _amount)
             {
                 if(lv != 0) emit InvitationReward(_to, lv, _amount);   
             }
            catch {}
    } 

    function setGovernance(address _governance) external {
        require(msg.sender == governance, "!governance");
        require(_governance != address(0), "zero");
        governance = _governance;
    }

    function governanceRecoverUnsupported(IERC20 _token, uint256 amount, address to) external {
        require(msg.sender == governance, "!governance");
        if (block.number < epochEndBlocks[3] + BLOCKS_PER_WEEK * 12) {
            // do not allow to drain lpToken if less than 3 months after farming
            require(_token != ibac, "!ibac");
            for (uint256 pid = 0; pid < poolLength; ++pid) {
                PoolInfo storage pool = poolInfo[pid];
                require(_token != pool.lpToken, "!pool.lpToken");
            }
        }
        _token.safeTransfer(to, amount);
    }
}

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