// SPDX-License-Identifier: AGPLv3
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, 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) {
        
        
        
        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;
        

        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;
    }
}

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:
     *
     * 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 >=0.6.2 <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) {
        
        
        

        uint256 size;
        
        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:
     * 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:
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https:
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        
        (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:
     *
     * 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");

        
        (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");

        
        (bool success, bytes memory returndata) = target.staticcall(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 {
            
            if (returndata.length > 0) {
                

                
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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 {
        
        
        
        
        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 {
        
        
        

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

pragma solidity >=0.6.0 <0.7.0;

contract Constants {
    uint8 public constant N_COINS = 3;
    uint8 public constant DEFAULT_DECIMALS = 18; 
    uint256 public constant DEFAULT_DECIMALS_FACTOR = uint256(10)**DEFAULT_DECIMALS;
    uint8 public constant CHAINLINK_PRICE_DECIMALS = 8;
    uint256 public constant CHAINLINK_PRICE_DECIMAL_FACTOR = uint256(10)**CHAINLINK_PRICE_DECIMALS;
    uint8 public constant PERCENTAGE_DECIMALS = 4;
    uint256 public constant PERCENTAGE_DECIMAL_FACTOR = uint256(10)**PERCENTAGE_DECIMALS;
    uint256 public constant CURVE_RATIO_DECIMALS = 6;
    uint256 public constant CURVE_RATIO_DECIMALS_FACTOR = uint256(10)**CURVE_RATIO_DECIMALS;
}

pragma solidity >=0.6.0 <0.7.0;

interface IToken {
    function factor() external view returns (uint256);

    function factor(uint256 totalAssets) external view returns (uint256);

    function mint(
        address account,
        uint256 _factor,
        uint256 amount
    ) external;

    function burn(
        address account,
        uint256 _factor,
        uint256 amount
    ) external;

    function burnAll(address account) external;

    function totalAssets() external view returns (uint256);

    function getPricePerShare() external view returns (uint256);

    function getShareAssets(uint256 shares) external view returns (uint256);

    function getAssets(address account) external view returns (uint256);
}

pragma solidity >=0.6.0 <0.7.0;

interface IVault {
    function withdraw(uint256 amount) external;

    function withdraw(uint256 amount, address recipient) external;

    function withdrawByStrategyOrder(
        uint256 amount,
        address recipient,
        bool reversed
    ) external;

    function withdrawByStrategyIndex(
        uint256 amount,
        address recipient,
        uint256 strategyIndex
    ) external;

    function deposit(uint256 amount) external;

    function updateStrategyRatio(uint256[] calldata strategyRetios) external;

    function totalAssets() external view returns (uint256);

    function getStrategiesLength() external view returns (uint256);

    function strategyHarvestTrigger(uint256 index, uint256 callCost) external view returns (bool);

    function strategyHarvest(uint256 index) external returns (bool);

    function getStrategyAssets(uint256 index) external view returns (uint256);

    function token() external view returns (address);

    function vault() external view returns (address);

    function investTrigger() external view returns (bool);

    function invest() external;
}

pragma solidity >=0.6.0 <0.7.0;

contract FixedStablecoins is Constants {
    address public immutable DAI; 
    address public immutable USDC; 
    address public immutable USDT; 

    uint256 public immutable DAI_DECIMALS; 
    uint256 public immutable USDC_DECIMALS; 
    uint256 public immutable USDT_DECIMALS; 

    constructor(address[N_COINS] memory _tokens, uint256[N_COINS] memory _decimals) public {
        DAI = _tokens[0];
        USDC = _tokens[1];
        USDT = _tokens[2];
        DAI_DECIMALS = _decimals[0];
        USDC_DECIMALS = _decimals[1];
        USDT_DECIMALS = _decimals[2];
    }

    function underlyingTokens() internal view returns (address[N_COINS] memory tokens) {
        tokens[0] = DAI;
        tokens[1] = USDC;
        tokens[2] = USDT;
    }

    function getToken(uint256 index) internal view returns (address) {
        if (index == 0) {
            return DAI;
        } else if (index == 1) {
            return USDC;
        } else {
            return USDT;
        }
    }

    function decimals() internal view returns (uint256[N_COINS] memory _decimals) {
        _decimals[0] = DAI_DECIMALS;
        _decimals[1] = USDC_DECIMALS;
        _decimals[2] = USDT_DECIMALS;
    }

    function getDecimal(uint256 index) internal view returns (uint256) {
        if (index == 0) {
            return DAI_DECIMALS;
        } else if (index == 1) {
            return USDC_DECIMALS;
        } else {
            return USDT_DECIMALS;
        }
    }
}

contract FixedGTokens {
    IToken public immutable pwrd;
    IToken public immutable gvt;

    constructor(address _pwrd, address _gvt) public {
        pwrd = IToken(_pwrd);
        gvt = IToken(_gvt);
    }

    function gTokens(bool _pwrd) internal view returns (IToken) {
        if (_pwrd) {
            return pwrd;
        } else {
            return gvt;
        }
    }
}

contract FixedVaults is Constants {
    address public immutable DAI_VAULT;
    address public immutable USDC_VAULT;
    address public immutable USDT_VAULT;

    constructor(address[N_COINS] memory _vaults) public {
        DAI_VAULT = _vaults[0];
        USDC_VAULT = _vaults[1];
        USDT_VAULT = _vaults[2];
    }

    function getVault(uint256 index) internal view returns (address) {
        if (index == 0) {
            return DAI_VAULT;
        } else if (index == 1) {
            return USDC_VAULT;
        } else {
            return USDT_VAULT;
        }
    }

    function vaults() internal view returns (address[N_COINS] memory _vaults) {
        _vaults[0] = DAI_VAULT;
        _vaults[1] = USDC_VAULT;
        _vaults[2] = USDT_VAULT;
    }
}

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; 
        return msg.data;
    }
}

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view 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;
    }
}

pragma solidity >=0.6.0 <0.7.0;

interface IController {
    function stablecoins() external view returns (address[3] memory);

    function vaults() external view returns (address[3] memory);

    function underlyingVaults(uint256 i) external view returns (address vault);

    function curveVault() external view returns (address);

    function pnl() external view returns (address);

    function insurance() external view returns (address);

    function lifeGuard() external view returns (address);

    function buoy() external view returns (address);

    function reward() external view returns (address);

    function isValidBigFish(
        bool pwrd,
        bool deposit,
        uint256 amount
    ) external view returns (bool);

    function withdrawHandler() external view returns (address);

    function emergencyHandler() external view returns (address);

    function depositHandler() external view returns (address);

    function totalAssets() external view returns (uint256);

    function gTokenTotalAssets() external view returns (uint256);

    function eoaOnly(address sender) external;

    function getSkimPercent() external view returns (uint256);

    function gToken(bool _pwrd) external view returns (address);

    function emergencyState() external view returns (bool);

    function deadCoin() external view returns (uint256);

    function distributeStrategyGainLoss(uint256 gain, uint256 loss) external;

    function burnGToken(
        bool pwrd,
        bool all,
        address account,
        uint256 amount,
        uint256 bonus
    ) external;

    function mintGToken(
        bool pwrd,
        address account,
        uint256 amount
    ) external;

    function getUserAssets(bool pwrd, address account) external view returns (uint256 deductUsd);

    function referrals(address account) external view returns (address);

    function addReferral(address account, address referral) external;

    function getStrategiesTargetRatio() external view returns (uint256[] memory);

    function withdrawalFee(bool pwrd) external view returns (uint256);

    function validGTokenDecrease(uint256 amount) external view returns (bool);
}

pragma solidity >=0.6.0 <0.7.0;

interface IPausable {
    function paused() external view returns (bool);
}

pragma solidity >=0.6.0 <0.7.0;

contract Controllable is Ownable {
    address public controller;

    event ChangeController(address indexed oldController, address indexed newController);

    modifier whenNotPaused() {
        require(!_pausable().paused(), "Pausable: paused");
        _;
    }

    modifier whenPaused() {
        require(_pausable().paused(), "Pausable: not paused");
        _;
    }

    function ctrlPaused() public view returns (bool) {
        return _pausable().paused();
    }

    function setController(address newController) external onlyOwner {
        require(newController != address(0), "setController: !0x");
        address oldController = controller;
        controller = newController;
        emit ChangeController(oldController, newController);
    }

    function _controller() internal view returns (IController) {
        require(controller != address(0), "Controller not set");
        return IController(controller);
    }

    function _pausable() internal view returns (IPausable) {
        require(controller != address(0), "Controller not set");
        return IPausable(controller);
    }
}

pragma solidity >=0.6.0 <0.7.0;

interface IBuoy {
    function safetyCheck() external view returns (bool);

    function updateRatios() external returns (bool);

    function updateRatiosWithTolerance(uint256 tolerance) external returns (bool);

    function lpToUsd(uint256 inAmount) external view returns (uint256);

    function usdToLp(uint256 inAmount) external view returns (uint256);

    function stableToUsd(uint256[3] calldata inAmount, bool deposit) external view returns (uint256);

    function stableToLp(uint256[3] calldata inAmount, bool deposit) external view returns (uint256);

    function singleStableFromLp(uint256 inAmount, int128 i) external view returns (uint256);

    function getVirtualPrice() external view returns (uint256);

    function singleStableFromUsd(uint256 inAmount, int128 i) external view returns (uint256);

    function singleStableToUsd(uint256 inAmount, uint256 i) external view returns (uint256);
}

pragma solidity >=0.6.0 <0.7.0;

interface IDepositHandler {
    function depositGvt(
        uint256[3] calldata inAmounts,
        uint256 minAmount,
        address _referral
    ) external;

    function depositPwrd(
        uint256[3] calldata inAmounts,
        uint256 minAmount,
        address _referral
    ) external;
}

pragma solidity >=0.6.0 <0.7.0;

interface IERC20Detailed {
    function name() external view returns (string memory);

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

    function decimals() external view returns (uint8);
}

pragma solidity >=0.6.0 <0.7.0;

interface IInsurance {
    function calculateDepositDeltasOnAllVaults() external view returns (uint256[3] memory);

    function rebalanceTrigger() external view returns (bool sysNeedRebalance);

    function rebalance() external;

    function calcSkim() external view returns (uint256);

    function rebalanceForWithdraw(uint256 withdrawUsd, bool pwrd) external returns (bool);

    function getDelta(uint256 withdrawUsd) external view returns (uint256[3] memory delta);

    function getVaultDeltaForDeposit(uint256 amount) external view returns (uint256[3] memory, uint256);

    function sortVaultsByDelta(bool bigFirst) external view returns (uint256[3] memory vaultIndexes);

    function getStrategiesTargetRatio(uint256 utilRatio) external view returns (uint256[] memory);

    function setUnderlyingTokenPercents(uint256[3] calldata percents) external;
}

pragma solidity >=0.6.0 <0.7.0;

interface ILifeGuard {
    function assets(uint256 i) external view returns (uint256);

    function totalAssets() external view returns (uint256);

    function getAssets() external view returns (uint256[3] memory);

    function totalAssetsUsd() external view returns (uint256);

    function availableUsd() external view returns (uint256 dollar);

    function availableLP() external view returns (uint256);

    function depositStable(bool rebalance) external returns (uint256);

    function investToCurveVault() external;

    function distributeCurveVault(uint256 amount, uint256[3] memory delta) external returns (uint256[3] memory);

    function deposit() external returns (uint256 usdAmount);

    function withdrawSingleByLiquidity(
        uint256 i,
        uint256 minAmount,
        address recipient
    ) external returns (uint256 usdAmount, uint256 amount);

    function withdrawSingleByExchange(
        uint256 i,
        uint256 minAmount,
        address recipient
    ) external returns (uint256 usdAmount, uint256 amount);

    function invest(uint256 whaleDepositAmount, uint256[3] calldata delta) external returns (uint256 dollarAmount);

    function getBuoy() external view returns (address);

    function investSingle(
        uint256[3] calldata inAmounts,
        uint256 i,
        uint256 j
    ) external returns (uint256 dollarAmount);

    function investToCurveVaultTrigger() external view returns (bool _invest);
}

pragma solidity >=0.6.0 <0.7.0;

contract DepositHandler is Controllable, FixedStablecoins, FixedVaults, IDepositHandler {

    using SafeERC20 for IERC20;
    using SafeMath for uint256;

    IController public ctrl;
    ILifeGuard public lg;
    IBuoy public buoy;
    IInsurance public insurance;
    uint256 constant USDT_INDEX = 2;

    event LogNewDependencies(address controller, address lifeguard, address buoy, address insurance);
    event LogNewDeposit(
        address indexed user,
        address indexed referral,
        bool pwrd,
        uint256 usdAmount,
        uint256[N_COINS] tokens
    );

    constructor(
        address[N_COINS] memory _vaults,
        address[N_COINS] memory _tokens,
        uint256[N_COINS] memory _decimals
    ) public FixedStablecoins(_tokens, _decimals) FixedVaults(_vaults) {
    }

    function setDependencies() external onlyOwner {
        ctrl = _controller();
        lg = ILifeGuard(ctrl.lifeGuard());
        buoy = IBuoy(lg.getBuoy());
        insurance = IInsurance(ctrl.insurance());
        emit LogNewDependencies(address(ctrl), address(lg), address(buoy), address(insurance));
    }

    function depositPwrd(
        uint256[N_COINS] memory inAmounts,
        uint256 minAmount,
        address _referral
    ) external override whenNotPaused {
        depositGToken(inAmounts, minAmount, _referral, true);
    }

    function depositGvt(
        uint256[N_COINS] memory inAmounts,
        uint256 minAmount,
        address _referral
    ) external override whenNotPaused {
        depositGToken(inAmounts, minAmount, _referral, false);
    }

    function depositGToken(
        uint256[N_COINS] memory inAmounts,
        uint256 minAmount,
        address _referral,
        bool pwrd
    ) private {
        IController _ctrl = ctrl;
        _ctrl.eoaOnly(msg.sender);
        require(minAmount > 0, "minAmount is 0");
        require(buoy.safetyCheck(), "!safetyCheck");
        _ctrl.addReferral(msg.sender, _referral);

        uint256 roughUsd = roughUsd(inAmounts);
        uint256 dollarAmount = _deposit(pwrd, roughUsd, minAmount, inAmounts);
        _ctrl.mintGToken(pwrd, msg.sender, dollarAmount);
        
        emit LogNewDeposit(msg.sender, _ctrl.referrals(msg.sender), pwrd, dollarAmount, inAmounts);
    }

    function _deposit(
        bool pwrd,
        uint256 roughUsd,
        uint256 minAmount,
        uint256[N_COINS] memory inAmounts
    ) private returns (uint256 dollarAmount) {
        
        IBuoy _buoy = buoy;
        if (ctrl.isValidBigFish(pwrd, true, roughUsd)) {
            address _lg = address(lg);
            for (uint256 i = 0; i < N_COINS; i++) {
                
                if (inAmounts[i] > 0) {
                    IERC20 token = IERC20(getToken(i));
                    if (i == USDT_INDEX) {
                        
                        uint256 current = token.balanceOf(_lg);
                        token.safeTransferFrom(msg.sender, _lg, inAmounts[i]);
                        inAmounts[i] = token.balanceOf(_lg).sub(current);
                    } else {
                        token.safeTransferFrom(msg.sender, _lg, inAmounts[i]);
                    }
                }
            }
            dollarAmount = _invest(inAmounts, roughUsd);
        } else {
            
            for (uint256 i = 0; i < N_COINS; i++) {
                if (inAmounts[i] > 0) {
                    
                    IERC20 token = IERC20(getToken(i));
                    address _vault = getVault(i);
                    if (i == USDT_INDEX) {
                        
                        uint256 current = token.balanceOf(_vault);
                        token.safeTransferFrom(msg.sender, _vault, inAmounts[i]);
                        inAmounts[i] = token.balanceOf(_vault).sub(current);
                    } else {
                        token.safeTransferFrom(msg.sender, _vault, inAmounts[i]);
                    }
                }
            }
            
            dollarAmount = _buoy.stableToUsd(inAmounts, true);
        }
        require(dollarAmount >= _buoy.lpToUsd(minAmount), "!minAmount");
    }

    function _invest(uint256[N_COINS] memory _inAmounts, uint256 roughUsd) internal returns (uint256 dollarAmount) {
        
        
        
        IInsurance _insurance = insurance;
        ILifeGuard _lg = lg;
        (uint256[N_COINS] memory vaultIndexes, uint256 _vaults) = _insurance.getVaultDeltaForDeposit(roughUsd);
        if (_vaults < N_COINS) {
            dollarAmount = _lg.investSingle(_inAmounts, vaultIndexes[0], vaultIndexes[1]);
        } else {
            uint256 outAmount = _lg.deposit();
            uint256[N_COINS] memory delta = _insurance.calculateDepositDeltasOnAllVaults();
            dollarAmount = _lg.invest(outAmount, delta);
        }
    }

    function roughUsd(uint256[N_COINS] memory inAmounts) private view returns (uint256 usdAmount) {
        for (uint256 i; i < N_COINS; i++) {
            if (inAmounts[i] > 0) {
                usdAmount = usdAmount.add(inAmounts[i].mul(10**18).div(getDecimal(i)));
            }
        }
    }
}

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