// File: contracts/swap/FlashSwapRouterV2.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;
pragma experimental ABIEncoderV2;

import "@uniswap/v3-core/contracts/libraries/TickMath.sol";
import "@uniswap/v3-core/contracts/libraries/SafeCast.sol";
import "@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol";
import "@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol";
import "@uniswap/v3-periphery/contracts/libraries/PoolAddress.sol";

import "./FlashSwapRouter.sol";

/// @dev See IQuoterV2.sol under https://github.com/Uniswap/v3-periphery/
interface IUniswapV3QuoterV2 {
    struct QuoteExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint256 amountIn;
        uint24 fee;
        uint160 sqrtPriceLimitX96;
    }

    function quoteExactInputSingle(QuoteExactInputSingleParams memory params)
        external
        returns (
            uint256 amountOut,
            uint160 sqrtPriceX96After,
            uint32 initializedTicksCrossed,
            uint256 gasEstimate
        );

    struct QuoteExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint256 amountOut;
        uint24 fee;
        uint160 sqrtPriceLimitX96;
    }

    function quoteExactOutputSingle(QuoteExactOutputSingleParams memory params)
        external
        returns (
            uint256 amountIn,
            uint160 sqrtPriceX96After,
            uint32 initializedTicksCrossed,
            uint256 gasEstimate
        );
}

/// @title Tranchess Flash Swap Router V2
/// @notice Router for stateless execution of flash swaps against Tranchess stable swaps
contract FlashSwapRouterV2 is FlashSwapRouter, IUniswapV3SwapCallback {
    using SafeMath for uint256;
    using SafeCast for uint256;
    using SafeERC20 for IERC20;

    struct InputParam {
        IFundV3 fund;
        address queenSwapOrPrimaryMarketRouter;
        uint256 resultBoundary;
        address recipient;
        address tokenQuote;
        uint24 externalPoolFee;
        address staking;
        uint256 version;
        uint256 amountR;
    }

    struct SwapCallbackData {
        InputParam inputs;
        address tokenUnderlying;
        PoolAddress.PoolKey poolKey;
        address payer;
    }

    address public immutable uniswapV3Factory;
    IUniswapV3QuoterV2 public immutable uniswapV3Quoter;

    constructor(
        address tranchessRouter_,
        address uniswapV3Factory_,
        address uniswapV3Quoter_
    ) public FlashSwapRouter(tranchessRouter_) {
        uniswapV3Factory = uniswapV3Factory_;
        uniswapV3Quoter = IUniswapV3QuoterV2(uniswapV3Quoter_);
    }

    /// @dev Only meant for an off-chain client to call with eth_call.
    ///      Note that `params.resultBoundary` is ignored.
    function getBuyRV2(InputParam memory params)
        external
        returns (uint256 quoteDelta, uint256 rookDelta)
    {
        // Calculate the exact amount of QUEEN
        uint256 inQ = IPrimaryMarketV3(params.fund.primaryMarket()).getSplitForB(params.amountR);
        // Calculate the exact amount of underlying asset
        uint256 underlyingAmount =
            IStableSwapCoreInternalRevertExpected(params.queenSwapOrPrimaryMarketRouter).getQuoteIn(
                inQ
            );
        // Calculate the exact amount of quote asset to pay
        (uint256 amountToPay, , , ) =
            uniswapV3Quoter.quoteExactOutputSingle(
                IUniswapV3QuoterV2.QuoteExactOutputSingleParams({
                    tokenIn: params.tokenQuote,
                    tokenOut: params.fund.tokenUnderlying(),
                    amountOut: underlyingAmount,
                    fee: params.externalPoolFee,
                    sqrtPriceLimitX96: 0
                })
            );
        // Calculate the QUEEN creation amount from underlying
        IStableSwapCoreInternalRevertExpected swapCore =
            IStableSwapCoreInternalRevertExpected(params.queenSwapOrPrimaryMarketRouter);
        uint256 outQ = swapCore.getBaseOut(underlyingAmount);
        // Get the amount of BISHOP and ROOK in split
        rookDelta = IPrimaryMarketV3(params.fund.primaryMarket()).getSplit(outQ);
        // Calculate the amount of quote from BISHOP sale
        IStableSwap tranchessPair =
            tranchessRouter.getSwap(params.fund.tokenB(), params.tokenQuote);
        uint256 quoteAmount = tranchessPair.getQuoteOut(rookDelta);
        // Subtract the amount of quote asset fulfilled by BISHOP sale
        quoteDelta = amountToPay.sub(quoteAmount);
    }

    /// @dev Only meant for an off-chain client to call with eth_call.
    ///      Note that `params.resultBoundary` is ignored.
    function getSellRV2(InputParam memory params)
        external
        returns (uint256 quoteDelta, uint256 rookDelta)
    {
        rookDelta = params.amountR;
        // Calculate the exact amount of QUEEN
        (uint256 outQ, ) = IPrimaryMarketV3(params.fund.primaryMarket()).getMerge(params.amountR);
        // Calculate the exact amount of underlying asset to pay
        uint256 underlyingAmount =
            IStableSwapCoreInternalRevertExpected(params.queenSwapOrPrimaryMarketRouter)
                .getQuoteOut(outQ);
        // Calculate the exact amount of quote asset to pay
        (uint256 amountToSend, , , ) =
            uniswapV3Quoter.quoteExactInputSingle(
                IUniswapV3QuoterV2.QuoteExactInputSingleParams({
                    tokenIn: params.fund.tokenUnderlying(),
                    tokenOut: params.tokenQuote,
                    amountIn: underlyingAmount,
                    fee: params.externalPoolFee,
                    sqrtPriceLimitX96: 0
                })
            );
        // Calculate the amount of quote needed for BISHOP
        IStableSwap tranchessPair =
            tranchessRouter.getSwap(params.fund.tokenB(), params.tokenQuote);
        uint256 quoteAmount = tranchessPair.getQuoteIn(params.amountR);
        // Subtract the amount of quote asset used to buy BISHOP
        quoteDelta = amountToSend.sub(quoteAmount);
    }

    function buyRV2(InputParam memory params) external {
        // Calculate the exact amount of QUEEN
        uint256 inQ = IPrimaryMarketV3(params.fund.primaryMarket()).getSplitForB(params.amountR);
        // Calculate the exact amount of underlying asset
        uint256 underlyingAmount =
            IStableSwapCoreInternalRevertExpected(params.queenSwapOrPrimaryMarketRouter).getQuoteIn(
                inQ
            );

        address tokenUnderlying = params.fund.tokenUnderlying();
        PoolAddress.PoolKey memory poolKey =
            PoolAddress.getPoolKey(tokenUnderlying, params.tokenQuote, params.externalPoolFee);
        IUniswapV3Pool pool = IUniswapV3Pool(PoolAddress.computeAddress(uniswapV3Factory, poolKey));
        bytes memory data = abi.encode(params, tokenUnderlying, poolKey, msg.sender);
        bool zeroForOne = params.tokenQuote == poolKey.token0;

        pool.swap(
            params.queenSwapOrPrimaryMarketRouter,
            zeroForOne,
            -underlyingAmount.toInt256(),
            zeroForOne ? TickMath.MIN_SQRT_RATIO + 1 : TickMath.MAX_SQRT_RATIO - 1,
            data
        );
    }

    function sellRV2(InputParam memory params) external {
        // Transfer user's ROOK to this router
        params.fund.trancheTransferFrom(
            TRANCHE_R,
            msg.sender,
            address(this),
            params.amountR,
            params.version
        );

        // Calculate the exact amount of QUEEN
        (uint256 outQ, ) = IPrimaryMarketV3(params.fund.primaryMarket()).getMerge(params.amountR);
        // Calculate the exact amount of underlying asset to pay
        uint256 underlyingAmount =
            IStableSwapCoreInternalRevertExpected(params.queenSwapOrPrimaryMarketRouter)
                .getQuoteOut(outQ);

        address tokenUnderlying = params.fund.tokenUnderlying();
        PoolAddress.PoolKey memory poolKey =
            PoolAddress.getPoolKey(tokenUnderlying, params.tokenQuote, params.externalPoolFee);
        IUniswapV3Pool pool = IUniswapV3Pool(PoolAddress.computeAddress(uniswapV3Factory, poolKey));
        bytes memory data = abi.encode(params, tokenUnderlying, poolKey, msg.sender);
        bool zeroForOne = params.tokenQuote == poolKey.token1;

        pool.swap(
            address(this),
            zeroForOne,
            underlyingAmount.toInt256(), // Exact input
            zeroForOne ? TickMath.MIN_SQRT_RATIO + 1 : TickMath.MAX_SQRT_RATIO - 1,
            data
        );
    }

    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external override {
        require(amount0Delta > 0 || amount1Delta > 0); // swaps entirely within 0-liquidity regions are not supported

        SwapCallbackData memory params = abi.decode(data, (SwapCallbackData));

        // Ensure that the pool is the one we expect
        address pool = PoolAddress.computeAddress(uniswapV3Factory, params.poolKey);
        require(msg.sender == pool);

        (address paymentToken, uint256 amountToPay, uint256 amountOut) =
            amount0Delta > 0
                ? (params.poolKey.token0, uint256(amount0Delta), uint256(-amount1Delta))
                : (params.poolKey.token1, uint256(amount1Delta), uint256(-amount0Delta));

        if (paymentToken == params.inputs.tokenQuote) {
            // Create or swap borrowed underlying for QUEEN
            IStableSwapCoreInternalRevertExpected swapCore =
                IStableSwapCoreInternalRevertExpected(params.inputs.queenSwapOrPrimaryMarketRouter);
            uint256 outQ = swapCore.getBaseOut(amountOut);
            outQ = swapCore.buy(params.inputs.version, outQ, address(this), "");
            // Split QUEEN into BISHOP and ROOK
            uint256 outB =
                IPrimaryMarketV3(params.inputs.fund.primaryMarket()).split(
                    address(this),
                    outQ,
                    params.inputs.version
                );
            // Arrange the stable swap path
            IStableSwap tranchessPair =
                tranchessRouter.getSwap(params.inputs.fund.tokenB(), params.inputs.tokenQuote);
            // Sell BISHOP to tranchess swap for quote asset
            uint256 quoteAmount = tranchessPair.getQuoteOut(outB);
            // Calculate the amount of quote asset for selling BISHOP, paying back part of the flashloan
            params.inputs.fund.trancheTransfer(
                TRANCHE_B,
                address(tranchessPair),
                outB,
                params.inputs.version
            );
            tranchessPair.sell(params.inputs.version, quoteAmount, msg.sender, "");
            // Send ROOK to recipient
            params.inputs.fund.trancheTransfer(
                TRANCHE_R,
                params.inputs.staking == address(0)
                    ? params.inputs.recipient
                    : params.inputs.staking,
                outB,
                params.inputs.version
            );
            if (params.inputs.staking != address(0)) {
                ShareStaking(params.inputs.staking).deposit(
                    TRANCHE_R,
                    outB,
                    params.inputs.recipient,
                    params.inputs.version
                );
            }
            // Pay back rest of the flashloan out of user pocket
            require(
                amountToPay.sub(quoteAmount) <= params.inputs.resultBoundary,
                "Excessive input"
            );
            IERC20(paymentToken).safeTransferFrom(
                params.payer,
                msg.sender,
                amountToPay - quoteAmount
            );
            emit SwapRook(params.inputs.recipient, 0, amountToPay - quoteAmount, outB, 0);
        } else if (paymentToken == params.tokenUnderlying) {
            // Arrange the stable swap path
            IStableSwap tranchessPair =
                tranchessRouter.getSwap(params.inputs.fund.tokenB(), params.inputs.tokenQuote);
            // Buy BISHOP from tranchess swap using quote asset
            uint256 quoteAmount = tranchessPair.getQuoteIn(params.inputs.amountR);
            IERC20(params.inputs.tokenQuote).safeTransfer(address(tranchessPair), quoteAmount);
            tranchessPair.buy(params.inputs.version, params.inputs.amountR, address(this), "");
            // Merge BISHOP and ROOK into QUEEN
            IStableSwapCoreInternalRevertExpected swapCore =
                IStableSwapCoreInternalRevertExpected(params.inputs.queenSwapOrPrimaryMarketRouter);
            uint256 outQ =
                IPrimaryMarketV3(params.inputs.fund.primaryMarket()).merge(
                    address(swapCore),
                    params.inputs.amountR,
                    params.inputs.version
                );
            // Redeem or swap QUEEN for underlying, paying back the flashloan
            uint256 underlyingAmount = swapCore.getQuoteOut(outQ);
            swapCore.sell(params.inputs.version, underlyingAmount, msg.sender, "");
            // Send the rest of quote asset to user
            require(
                amountOut.sub(quoteAmount) >= params.inputs.resultBoundary,
                "Insufficient output"
            );
            IERC20(params.inputs.tokenQuote).safeTransfer(
                params.inputs.recipient,
                amountOut - quoteAmount
            );
            emit SwapRook(
                params.inputs.recipient,
                params.inputs.amountR,
                0,
                0,
                amountOut - quoteAmount
            );
        }
    }
}

// File: @uniswap/v3-core/contracts/libraries/TickMath.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0 <0.8.0;

/// @title Math library for computing sqrt prices from ticks and vice versa
/// @notice Computes sqrt price for ticks of size 1.0001, i.e. sqrt(1.0001^tick) as fixed point Q64.96 numbers. Supports
/// prices between 2**-128 and 2**128
library TickMath {
    /// @dev The minimum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**-128
    int24 internal constant MIN_TICK = -887272;
    /// @dev The maximum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**128
    int24 internal constant MAX_TICK = -MIN_TICK;

    /// @dev The minimum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MIN_TICK)
    uint160 internal constant MIN_SQRT_RATIO = 4295128739;
    /// @dev The maximum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MAX_TICK)
    uint160 internal constant MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342;

    /// @notice Calculates sqrt(1.0001^tick) * 2^96
    /// @dev Throws if |tick| > max tick
    /// @param tick The input tick for the above formula
    /// @return sqrtPriceX96 A Fixed point Q64.96 number representing the sqrt of the ratio of the two assets (token1/token0)
    /// at the given tick
    function getSqrtRatioAtTick(int24 tick) internal pure returns (uint160 sqrtPriceX96) {
        uint256 absTick = tick < 0 ? uint256(-int256(tick)) : uint256(int256(tick));
        require(absTick <= uint256(MAX_TICK), 'T');

        uint256 ratio = absTick & 0x1 != 0 ? 0xfffcb933bd6fad37aa2d162d1a594001 : 0x100000000000000000000000000000000;
        if (absTick & 0x2 != 0) ratio = (ratio * 0xfff97272373d413259a46990580e213a) >> 128;
        if (absTick & 0x4 != 0) ratio = (ratio * 0xfff2e50f5f656932ef12357cf3c7fdcc) >> 128;
        if (absTick & 0x8 != 0) ratio = (ratio * 0xffe5caca7e10e4e61c3624eaa0941cd0) >> 128;
        if (absTick & 0x10 != 0) ratio = (ratio * 0xffcb9843d60f6159c9db58835c926644) >> 128;
        if (absTick & 0x20 != 0) ratio = (ratio * 0xff973b41fa98c081472e6896dfb254c0) >> 128;
        if (absTick & 0x40 != 0) ratio = (ratio * 0xff2ea16466c96a3843ec78b326b52861) >> 128;
        if (absTick & 0x80 != 0) ratio = (ratio * 0xfe5dee046a99a2a811c461f1969c3053) >> 128;
        if (absTick & 0x100 != 0) ratio = (ratio * 0xfcbe86c7900a88aedcffc83b479aa3a4) >> 128;
        if (absTick & 0x200 != 0) ratio = (ratio * 0xf987a7253ac413176f2b074cf7815e54) >> 128;
        if (absTick & 0x400 != 0) ratio = (ratio * 0xf3392b0822b70005940c7a398e4b70f3) >> 128;
        if (absTick & 0x800 != 0) ratio = (ratio * 0xe7159475a2c29b7443b29c7fa6e889d9) >> 128;
        if (absTick & 0x1000 != 0) ratio = (ratio * 0xd097f3bdfd2022b8845ad8f792aa5825) >> 128;
        if (absTick & 0x2000 != 0) ratio = (ratio * 0xa9f746462d870fdf8a65dc1f90e061e5) >> 128;
        if (absTick & 0x4000 != 0) ratio = (ratio * 0x70d869a156d2a1b890bb3df62baf32f7) >> 128;
        if (absTick & 0x8000 != 0) ratio = (ratio * 0x31be135f97d08fd981231505542fcfa6) >> 128;
        if (absTick & 0x10000 != 0) ratio = (ratio * 0x9aa508b5b7a84e1c677de54f3e99bc9) >> 128;
        if (absTick & 0x20000 != 0) ratio = (ratio * 0x5d6af8dedb81196699c329225ee604) >> 128;
        if (absTick & 0x40000 != 0) ratio = (ratio * 0x2216e584f5fa1ea926041bedfe98) >> 128;
        if (absTick & 0x80000 != 0) ratio = (ratio * 0x48a170391f7dc42444e8fa2) >> 128;

        if (tick > 0) ratio = type(uint256).max / ratio;

        // this divides by 1<<32 rounding up to go from a Q128.128 to a Q128.96.
        // we then downcast because we know the result always fits within 160 bits due to our tick input constraint
        // we round up in the division so getTickAtSqrtRatio of the output price is always consistent
        sqrtPriceX96 = uint160((ratio >> 32) + (ratio % (1 << 32) == 0 ? 0 : 1));
    }

    /// @notice Calculates the greatest tick value such that getRatioAtTick(tick) <= ratio
    /// @dev Throws in case sqrtPriceX96 < MIN_SQRT_RATIO, as MIN_SQRT_RATIO is the lowest value getRatioAtTick may
    /// ever return.
    /// @param sqrtPriceX96 The sqrt ratio for which to compute the tick as a Q64.96
    /// @return tick The greatest tick for which the ratio is less than or equal to the input ratio
    function getTickAtSqrtRatio(uint160 sqrtPriceX96) internal pure returns (int24 tick) {
        // second inequality must be < because the price can never reach the price at the max tick
        require(sqrtPriceX96 >= MIN_SQRT_RATIO && sqrtPriceX96 < MAX_SQRT_RATIO, 'R');
        uint256 ratio = uint256(sqrtPriceX96) << 32;

        uint256 r = ratio;
        uint256 msb = 0;

        assembly {
            let f := shl(7, gt(r, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
            msb := or(msb, f)
            r := shr(f, r)
        }
        assembly {
            let f := shl(6, gt(r, 0xFFFFFFFFFFFFFFFF))
            msb := or(msb, f)
            r := shr(f, r)
        }
        assembly {
            let f := shl(5, gt(r, 0xFFFFFFFF))
            msb := or(msb, f)
            r := shr(f, r)
        }
        assembly {
            let f := shl(4, gt(r, 0xFFFF))
            msb := or(msb, f)
            r := shr(f, r)
        }
        assembly {
            let f := shl(3, gt(r, 0xFF))
            msb := or(msb, f)
            r := shr(f, r)
        }
        assembly {
            let f := shl(2, gt(r, 0xF))
            msb := or(msb, f)
            r := shr(f, r)
        }
        assembly {
            let f := shl(1, gt(r, 0x3))
            msb := or(msb, f)
            r := shr(f, r)
        }
        assembly {
            let f := gt(r, 0x1)
            msb := or(msb, f)
        }

        if (msb >= 128) r = ratio >> (msb - 127);
        else r = ratio << (127 - msb);

        int256 log_2 = (int256(msb) - 128) << 64;

        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(63, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(62, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(61, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(60, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(59, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(58, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(57, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(56, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(55, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(54, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(53, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(52, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(51, f))
            r := shr(f, r)
        }
        assembly {
            r := shr(127, mul(r, r))
            let f := shr(128, r)
            log_2 := or(log_2, shl(50, f))
        }

        int256 log_sqrt10001 = log_2 * 255738958999603826347141; // 128.128 number

        int24 tickLow = int24((log_sqrt10001 - 3402992956809132418596140100660247210) >> 128);
        int24 tickHi = int24((log_sqrt10001 + 291339464771989622907027621153398088495) >> 128);

        tick = tickLow == tickHi ? tickLow : getSqrtRatioAtTick(tickHi) <= sqrtPriceX96 ? tickHi : tickLow;
    }
}

// File: @uniswap/v3-core/contracts/libraries/SafeCast.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Safe casting methods
/// @notice Contains methods for safely casting between types
library SafeCast {
    /// @notice Cast a uint256 to a uint160, revert on overflow
    /// @param y The uint256 to be downcasted
    /// @return z The downcasted integer, now type uint160
    function toUint160(uint256 y) internal pure returns (uint160 z) {
        require((z = uint160(y)) == y);
    }

    /// @notice Cast a int256 to a int128, revert on overflow or underflow
    /// @param y The int256 to be downcasted
    /// @return z The downcasted integer, now type int128
    function toInt128(int256 y) internal pure returns (int128 z) {
        require((z = int128(y)) == y);
    }

    /// @notice Cast a uint256 to a int256, revert on overflow
    /// @param y The uint256 to be casted
    /// @return z The casted integer, now type int256
    function toInt256(uint256 y) internal pure returns (int256 z) {
        require(y < 2**255);
        z = int256(y);
    }
}

// File: @uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

import './pool/IUniswapV3PoolImmutables.sol';
import './pool/IUniswapV3PoolState.sol';
import './pool/IUniswapV3PoolDerivedState.sol';
import './pool/IUniswapV3PoolActions.sol';
import './pool/IUniswapV3PoolOwnerActions.sol';
import './pool/IUniswapV3PoolEvents.sol';

/// @title The interface for a Uniswap V3 Pool
/// @notice A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform
/// to the ERC20 specification
/// @dev The pool interface is broken up into many smaller pieces
interface IUniswapV3Pool is
    IUniswapV3PoolImmutables,
    IUniswapV3PoolState,
    IUniswapV3PoolDerivedState,
    IUniswapV3PoolActions,
    IUniswapV3PoolOwnerActions,
    IUniswapV3PoolEvents
{

}

// File: @uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
    /// @dev In the implementation you must pay the pool tokens owed for the swap.
    /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
    /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
    /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
    /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
    /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external;
}

// File: @uniswap/v3-periphery/contracts/libraries/PoolAddress.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Provides functions for deriving a pool address from the factory, tokens, and the fee
library PoolAddress {
    bytes32 internal constant POOL_INIT_CODE_HASH = 0xe34f199b19b2b4f47f68442619d555527d244f78a3297ea89325f843f87b8b54;

    /// @notice The identifying key of the pool
    struct PoolKey {
        address token0;
        address token1;
        uint24 fee;
    }

    /// @notice Returns PoolKey: the ordered tokens with the matched fee levels
    /// @param tokenA The first token of a pool, unsorted
    /// @param tokenB The second token of a pool, unsorted
    /// @param fee The fee level of the pool
    /// @return Poolkey The pool details with ordered token0 and token1 assignments
    function getPoolKey(
        address tokenA,
        address tokenB,
        uint24 fee
    ) internal pure returns (PoolKey memory) {
        if (tokenA > tokenB) (tokenA, tokenB) = (tokenB, tokenA);
        return PoolKey({token0: tokenA, token1: tokenB, fee: fee});
    }

    /// @notice Deterministically computes the pool address given the factory and PoolKey
    /// @param factory The Uniswap V3 factory contract address
    /// @param key The PoolKey
    /// @return pool The contract address of the V3 pool
    function computeAddress(address factory, PoolKey memory key) internal pure returns (address pool) {
        require(key.token0 < key.token1);
        pool = address(
            uint256(
                keccak256(
                    abi.encodePacked(
                        hex'ff',
                        factory,
                        keccak256(abi.encode(key.token0, key.token1, key.fee)),
                        POOL_INIT_CODE_HASH
                    )
                )
            )
        );
    }
}

// File: contracts/swap/FlashSwapRouter.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol";

import "../fund/ShareStaking.sol";

import "../interfaces/ITranchessSwapCallee.sol";
import "../interfaces/IPrimaryMarketV3.sol";
import "../interfaces/ISwapRouter.sol";
import "../interfaces/ITrancheIndexV2.sol";

/// @title Tranchess Flash Swap Router
/// @notice Router for stateless execution of flash swaps against Tranchess stable swaps
contract FlashSwapRouter is ITranchessSwapCallee, ITrancheIndexV2, Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    event SwapToggled(address externalRouter, bool enabled);
    event SwapRook(
        address indexed recipient,
        uint256 baseIn,
        uint256 quoteIn,
        uint256 baseOut,
        uint256 quoteOut
    );

    ISwapRouter public immutable tranchessRouter;
    mapping(address => bool) public externalRouterAllowlist;

    constructor(address tranchessRouter_) public {
        tranchessRouter = ISwapRouter(tranchessRouter_);
    }

    /// @dev Only meant for an off-chain client to call with eth_call.
    function getBuyR(
        IFundV3 fund,
        address queenSwapOrPrimaryMarketRouter,
        address tokenQuote,
        address externalRouter,
        address[] memory externalPath,
        uint256 outR
    ) external returns (uint256 quoteDelta, uint256 rookDelta) {
        uint256 underlyingAmount;
        uint256 totalQuoteAmount;
        {
            uint256 inQ = IPrimaryMarketV3(fund.primaryMarket()).getSplitForB(outR);
            underlyingAmount = IStableSwapCoreInternalRevertExpected(queenSwapOrPrimaryMarketRouter)
                .getQuoteIn(inQ);
            // Calculate the exact amount of quote asset to pay
            totalQuoteAmount = IUniswapV2Router01(externalRouter).getAmountsIn(
                underlyingAmount,
                externalPath
            )[0];
            // Calculate the amount of quote asset for selling BISHOP
            IStableSwap tranchessPair = tranchessRouter.getSwap(fund.tokenB(), tokenQuote);
            uint256 quoteAmount = tranchessPair.getQuoteOut(outR);
            // Calculate the user's portion of the payment to Tranchess swap
            quoteDelta = totalQuoteAmount.sub(quoteAmount);
            // Calculate the quote asset for underlying asset
            underlyingAmount = IUniswapV2Router01(externalRouter).getAmountsOut(
                totalQuoteAmount,
                externalPath
            )[externalPath.length - 1];
        }
        // Calculate creation of borrowed underlying for QUEEN
        uint256 outQ =
            IStableSwapCoreInternalRevertExpected(queenSwapOrPrimaryMarketRouter).getBaseOut(
                underlyingAmount
            );
        // Calculate the split result of QUEEN into BISHOP and ROOK
        rookDelta = IPrimaryMarketV3(fund.primaryMarket()).getSplit(outQ);
    }

    /// @dev Only meant for an off-chain client to call with eth_call.
    function getSellR(
        IFundV3 fund,
        address queenSwapOrPrimaryMarketRouter,
        address tokenQuote,
        address externalRouter,
        address[] memory externalPath,
        uint256 inR
    ) external returns (uint256 quoteDelta, uint256 rookDelta) {
        rookDelta = inR;
        uint256 quoteAmount =
            IStableSwap(tranchessRouter.getSwap(fund.tokenB(), tokenQuote)).getQuoteIn(inR);
        // Calculate merge result of BISHOP and ROOK into QUEEN
        (uint256 outQ, ) = IPrimaryMarketV3(fund.primaryMarket()).getMerge(inR);
        // Calculate the redemption from QUEEN to underlying
        uint256 underlyingAmount =
            IStableSwapCoreInternalRevertExpected(queenSwapOrPrimaryMarketRouter).getQuoteOut(outQ);
        // Calculate the underlying for quote asset
        uint256 totalQuoteAmount =
            IUniswapV2Router01(externalRouter).getAmountsOut(underlyingAmount, externalPath)[
                externalPath.length - 1
            ];
        // Calculate the rest of quote asset to user
        quoteDelta = totalQuoteAmount.sub(quoteAmount);
    }

    function toggleExternalRouter(address externalRouter) external onlyOwner {
        bool enabled = !externalRouterAllowlist[externalRouter];
        externalRouterAllowlist[externalRouter] = enabled;
        emit SwapToggled(externalRouter, enabled);
    }

    function buyR(
        IFundV3 fund,
        address queenSwapOrPrimaryMarketRouter,
        uint256 maxQuote,
        address recipient,
        address tokenQuote,
        address externalRouter,
        address[] memory externalPath,
        address staking,
        uint256 version,
        uint256 outR
    ) external {
        require(externalRouterAllowlist[externalRouter], "Invalid external router");
        uint256 underlyingAmount;
        uint256 totalQuoteAmount;
        bytes memory data;
        {
            uint256 inQ = IPrimaryMarketV3(fund.primaryMarket()).getSplitForB(outR);
            underlyingAmount = IStableSwapCoreInternalRevertExpected(queenSwapOrPrimaryMarketRouter)
                .getQuoteIn(inQ);
            // Calculate the exact amount of quote asset to pay
            totalQuoteAmount = IUniswapV2Router01(externalRouter).getAmountsIn(
                underlyingAmount,
                externalPath
            )[0];
            data = abi.encode(
                fund,
                queenSwapOrPrimaryMarketRouter,
                totalQuoteAmount,
                staking == address(0) ? recipient : staking,
                version,
                externalRouter,
                externalPath
            );
        }
        // Arrange the stable swap path
        IStableSwap tranchessPair = tranchessRouter.getSwap(fund.tokenB(), tokenQuote);
        address recipient_ = recipient;
        address tokenQuote_ = tokenQuote;
        // Calculate the amount of quote asset for selling BISHOP
        uint256 quoteAmount = tranchessPair.getQuoteOut(outR);
        // Send the user's portion of the payment to Tranchess swap
        uint256 resultAmount = totalQuoteAmount.sub(quoteAmount);
        require(resultAmount <= maxQuote, "Excessive input");
        IERC20(tokenQuote_).safeTransferFrom(msg.sender, address(this), resultAmount);
        tranchessPair.sell(version, quoteAmount, address(this), data);
        if (staking != address(0)) {
            ShareStaking(staking).deposit(TRANCHE_R, outR, recipient_, version);
        }
        emit SwapRook(recipient_, 0, resultAmount, outR, 0);
    }

    function sellR(
        IFundV3 fund,
        address queenSwapOrPrimaryMarketRouter,
        uint256 minQuote,
        address recipient,
        address tokenQuote,
        address externalRouter,
        address[] memory externalPath,
        uint256 version,
        uint256 inR
    ) external {
        require(externalRouterAllowlist[externalRouter], "Invalid external router");
        // Send the user's ROOK to this router
        fund.trancheTransferFrom(TRANCHE_R, msg.sender, address(this), inR, version);
        bytes memory data =
            abi.encode(
                fund,
                queenSwapOrPrimaryMarketRouter,
                minQuote,
                recipient,
                version,
                externalRouter,
                externalPath
            );
        tranchessRouter.getSwap(fund.tokenB(), tokenQuote).buy(version, inR, address(this), data);
    }

    function tranchessSwapCallback(
        uint256 baseOut,
        uint256 quoteOut,
        bytes calldata data
    ) external override {
        (
            IFundV3 fund,
            address queenSwapOrPrimaryMarketRouter,
            uint256 expectQuoteAmount,
            address recipient,
            uint256 version,
            ,

        ) = abi.decode(data, (IFundV3, address, uint256, address, uint256, address, address[]));
        address tokenQuote = IStableSwap(msg.sender).quoteAddress();
        require(
            msg.sender == address(tranchessRouter.getSwap(tokenQuote, fund.tokenB())),
            "Tranchess Pair check failed"
        );
        if (baseOut > 0) {
            uint256 resultAmount;
            {
                require(quoteOut == 0, "Unidirectional check failed");
                uint256 quoteAmount = IStableSwap(msg.sender).getQuoteIn(baseOut);
                // Merge BISHOP and ROOK into QUEEN
                uint256 outQ =
                    IPrimaryMarketV3(fund.primaryMarket()).merge(
                        queenSwapOrPrimaryMarketRouter,
                        baseOut,
                        version
                    );

                // Redeem or swap QUEEN for underlying
                uint256 underlyingAmount =
                    IStableSwapCoreInternalRevertExpected(queenSwapOrPrimaryMarketRouter)
                        .getQuoteOut(outQ);
                underlyingAmount = IStableSwapCoreInternalRevertExpected(
                    queenSwapOrPrimaryMarketRouter
                )
                    .sell(version, underlyingAmount, address(this), "");

                // Trade underlying for quote asset
                uint256 totalQuoteAmount =
                    _externalSwap(data, underlyingAmount, fund.tokenUnderlying(), tokenQuote);
                // Send back quote asset to tranchess swap
                IERC20(tokenQuote).safeTransfer(msg.sender, quoteAmount);
                // Send the rest of quote asset to user
                resultAmount = totalQuoteAmount.sub(quoteAmount);
                require(resultAmount >= expectQuoteAmount, "Insufficient output");
                IERC20(tokenQuote).safeTransfer(recipient, resultAmount);
            }
            emit SwapRook(recipient, baseOut, 0, 0, resultAmount);
        } else {
            address tokenUnderlying = fund.tokenUnderlying();
            // Trade quote asset for underlying asset
            uint256 underlyingAmount =
                _externalSwap(data, expectQuoteAmount, tokenQuote, tokenUnderlying);

            // Create or swap borrowed underlying for QUEEN
            uint256 outQ =
                IStableSwapCoreInternalRevertExpected(queenSwapOrPrimaryMarketRouter).getBaseOut(
                    underlyingAmount
                );
            IERC20(tokenUnderlying).safeTransfer(queenSwapOrPrimaryMarketRouter, underlyingAmount);
            outQ = IStableSwapCoreInternalRevertExpected(queenSwapOrPrimaryMarketRouter).buy(
                version,
                outQ,
                address(this),
                ""
            );

            // Split QUEEN into BISHOP and ROOK
            uint256 outB =
                IPrimaryMarketV3(fund.primaryMarket()).split(address(this), outQ, version);
            // Send back BISHOP to tranchess swap
            fund.trancheTransfer(TRANCHE_B, msg.sender, outB, version);
            // Send ROOK to user
            fund.trancheTransfer(TRANCHE_R, recipient, outB, version);
        }
    }

    function _externalSwap(
        bytes memory data,
        uint256 amountIn,
        address tokenIn,
        address tokenOut
    ) private returns (uint256 amountOut) {
        (, , , , , address externalRouter, address[] memory externalPath) =
            abi.decode(data, (address, address, uint256, address, uint256, address, address[]));
        require(externalPath.length > 1, "Invalid external path");
        require(externalPath[0] == tokenIn, "Invalid token in");
        require(externalPath[externalPath.length - 1] == tokenOut, "Invalid token out");
        IERC20(tokenIn).safeApprove(externalRouter, amountIn);
        amountOut = IUniswapV2Router01(externalRouter).swapExactTokensForTokens(
            amountIn,
            0,
            externalPath,
            address(this),
            block.timestamp
        )[externalPath.length - 1];
    }
}

// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolImmutables.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3PoolImmutables {
    /// @notice The contract that deployed the pool, which must adhere to the IUniswapV3Factory interface
    /// @return The contract address
    function factory() external view returns (address);

    /// @notice The first of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token0() external view returns (address);

    /// @notice The second of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token1() external view returns (address);

    /// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
    /// @return The fee
    function fee() external view returns (uint24);

    /// @notice The pool tick spacing
    /// @dev Ticks can only be used at multiples of this value, minimum of 1 and always positive
    /// e.g.: a tickSpacing of 3 means ticks can be initialized every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ...
    /// This value is an int24 to avoid casting even though it is always positive.
    /// @return The tick spacing
    function tickSpacing() external view returns (int24);

    /// @notice The maximum amount of position liquidity that can use any tick in the range
    /// @dev This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and
    /// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool
    /// @return The max amount of liquidity per tick
    function maxLiquidityPerTick() external view returns (uint128);
}

// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolState.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Pool state that can change
/// @notice These methods compose the pool's state, and can change with any frequency including multiple times
/// per transaction
interface IUniswapV3PoolState {
    /// @notice The 0th storage slot in the pool stores many values, and is exposed as a single method to save gas
    /// when accessed externally.
    /// @return sqrtPriceX96 The current price of the pool as a sqrt(token1/token0) Q64.96 value
    /// tick The current tick of the pool, i.e. according to the last tick transition that was run.
    /// This value may not always be equal to SqrtTickMath.getTickAtSqrtRatio(sqrtPriceX96) if the price is on a tick
    /// boundary.
    /// observationIndex The index of the last oracle observation that was written,
    /// observationCardinality The current maximum number of observations stored in the pool,
    /// observationCardinalityNext The next maximum number of observations, to be updated when the observation.
    /// feeProtocol The protocol fee for both tokens of the pool.
    /// Encoded as two 4 bit values, where the protocol fee of token1 is shifted 4 bits and the protocol fee of token0
    /// is the lower 4 bits. Used as the denominator of a fraction of the swap fee, e.g. 4 means 1/4th of the swap fee.
    /// unlocked Whether the pool is currently locked to reentrancy
    function slot0()
        external
        view
        returns (
            uint160 sqrtPriceX96,
            int24 tick,
            uint16 observationIndex,
            uint16 observationCardinality,
            uint16 observationCardinalityNext,
            uint8 feeProtocol,
            bool unlocked
        );

    /// @notice The fee growth as a Q128.128 fees of token0 collected per unit of liquidity for the entire life of the pool
    /// @dev This value can overflow the uint256
    function feeGrowthGlobal0X128() external view returns (uint256);

    /// @notice The fee growth as a Q128.128 fees of token1 collected per unit of liquidity for the entire life of the pool
    /// @dev This value can overflow the uint256
    function feeGrowthGlobal1X128() external view returns (uint256);

    /// @notice The amounts of token0 and token1 that are owed to the protocol
    /// @dev Protocol fees will never exceed uint128 max in either token
    function protocolFees() external view returns (uint128 token0, uint128 token1);

    /// @notice The currently in range liquidity available to the pool
    /// @dev This value has no relationship to the total liquidity across all ticks
    function liquidity() external view returns (uint128);

    /// @notice Look up information about a specific tick in the pool
    /// @param tick The tick to look up
    /// @return liquidityGross the total amount of position liquidity that uses the pool either as tick lower or
    /// tick upper,
    /// liquidityNet how much liquidity changes when the pool price crosses the tick,
    /// feeGrowthOutside0X128 the fee growth on the other side of the tick from the current tick in token0,
    /// feeGrowthOutside1X128 the fee growth on the other side of the tick from the current tick in token1,
    /// tickCumulativeOutside the cumulative tick value on the other side of the tick from the current tick
    /// secondsPerLiquidityOutsideX128 the seconds spent per liquidity on the other side of the tick from the current tick,
    /// secondsOutside the seconds spent on the other side of the tick from the current tick,
    /// initialized Set to true if the tick is initialized, i.e. liquidityGross is greater than 0, otherwise equal to false.
    /// Outside values can only be used if the tick is initialized, i.e. if liquidityGross is greater than 0.
    /// In addition, these values are only relative and must be used only in comparison to previous snapshots for
    /// a specific position.
    function ticks(int24 tick)
        external
        view
        returns (
            uint128 liquidityGross,
            int128 liquidityNet,
            uint256 feeGrowthOutside0X128,
            uint256 feeGrowthOutside1X128,
            int56 tickCumulativeOutside,
            uint160 secondsPerLiquidityOutsideX128,
            uint32 secondsOutside,
            bool initialized
        );

    /// @notice Returns 256 packed tick initialized boolean values. See TickBitmap for more information
    function tickBitmap(int16 wordPosition) external view returns (uint256);

    /// @notice Returns the information about a position by the position's key
    /// @param key The position's key is a hash of a preimage composed by the owner, tickLower and tickUpper
    /// @return _liquidity The amount of liquidity in the position,
    /// Returns feeGrowthInside0LastX128 fee growth of token0 inside the tick range as of the last mint/burn/poke,
    /// Returns feeGrowthInside1LastX128 fee growth of token1 inside the tick range as of the last mint/burn/poke,
    /// Returns tokensOwed0 the computed amount of token0 owed to the position as of the last mint/burn/poke,
    /// Returns tokensOwed1 the computed amount of token1 owed to the position as of the last mint/burn/poke
    function positions(bytes32 key)
        external
        view
        returns (
            uint128 _liquidity,
            uint256 feeGrowthInside0LastX128,
            uint256 feeGrowthInside1LastX128,
            uint128 tokensOwed0,
            uint128 tokensOwed1
        );

    /// @notice Returns data about a specific observation index
    /// @param index The element of the observations array to fetch
    /// @dev You most likely want to use #observe() instead of this method to get an observation as of some amount of time
    /// ago, rather than at a specific index in the array.
    /// @return blockTimestamp The timestamp of the observation,
    /// Returns tickCumulative the tick multiplied by seconds elapsed for the life of the pool as of the observation timestamp,
    /// Returns secondsPerLiquidityCumulativeX128 the seconds per in range liquidity for the life of the pool as of the observation timestamp,
    /// Returns initialized whether the observation has been initialized and the values are safe to use
    function observations(uint256 index)
        external
        view
        returns (
            uint32 blockTimestamp,
            int56 tickCumulative,
            uint160 secondsPerLiquidityCumulativeX128,
            bool initialized
        );
}

// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolDerivedState.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Pool state that is not stored
/// @notice Contains view functions to provide information about the pool that is computed rather than stored on the
/// blockchain. The functions here may have variable gas costs.
interface IUniswapV3PoolDerivedState {
    /// @notice Returns the cumulative tick and liquidity as of each timestamp `secondsAgo` from the current block timestamp
    /// @dev To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing
    /// the beginning of the period and another for the end of the period. E.g., to get the last hour time-weighted average tick,
    /// you must call it with secondsAgos = [3600, 0].
    /// @dev The time weighted average tick represents the geometric time weighted average price of the pool, in
    /// log base sqrt(1.0001) of token1 / token0. The TickMath library can be used to go from a tick value to a ratio.
    /// @param secondsAgos From how long ago each cumulative tick and liquidity value should be returned
    /// @return tickCumulatives Cumulative tick values as of each `secondsAgos` from the current block timestamp
    /// @return secondsPerLiquidityCumulativeX128s Cumulative seconds per liquidity-in-range value as of each `secondsAgos` from the current block
    /// timestamp
    function observe(uint32[] calldata secondsAgos)
        external
        view
        returns (int56[] memory tickCumulatives, uint160[] memory secondsPerLiquidityCumulativeX128s);

    /// @notice Returns a snapshot of the tick cumulative, seconds per liquidity and seconds inside a tick range
    /// @dev Snapshots must only be compared to other snapshots, taken over a period for which a position existed.
    /// I.e., snapshots cannot be compared if a position is not held for the entire period between when the first
    /// snapshot is taken and the second snapshot is taken.
    /// @param tickLower The lower tick of the range
    /// @param tickUpper The upper tick of the range
    /// @return tickCumulativeInside The snapshot of the tick accumulator for the range
    /// @return secondsPerLiquidityInsideX128 The snapshot of seconds per liquidity for the range
    /// @return secondsInside The snapshot of seconds per liquidity for the range
    function snapshotCumulativesInside(int24 tickLower, int24 tickUpper)
        external
        view
        returns (
            int56 tickCumulativeInside,
            uint160 secondsPerLiquidityInsideX128,
            uint32 secondsInside
        );
}

// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolActions.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Permissionless pool actions
/// @notice Contains pool methods that can be called by anyone
interface IUniswapV3PoolActions {
    /// @notice Sets the initial price for the pool
    /// @dev Price is represented as a sqrt(amountToken1/amountToken0) Q64.96 value
    /// @param sqrtPriceX96 the initial sqrt price of the pool as a Q64.96
    function initialize(uint160 sqrtPriceX96) external;

    /// @notice Adds liquidity for the given recipient/tickLower/tickUpper position
    /// @dev The caller of this method receives a callback in the form of IUniswapV3MintCallback#uniswapV3MintCallback
    /// in which they must pay any token0 or token1 owed for the liquidity. The amount of token0/token1 due depends
    /// on tickLower, tickUpper, the amount of liquidity, and the current price.
    /// @param recipient The address for which the liquidity will be created
    /// @param tickLower The lower tick of the position in which to add liquidity
    /// @param tickUpper The upper tick of the position in which to add liquidity
    /// @param amount The amount of liquidity to mint
    /// @param data Any data that should be passed through to the callback
    /// @return amount0 The amount of token0 that was paid to mint the given amount of liquidity. Matches the value in the callback
    /// @return amount1 The amount of token1 that was paid to mint the given amount of liquidity. Matches the value in the callback
    function mint(
        address recipient,
        int24 tickLower,
        int24 tickUpper,
        uint128 amount,
        bytes calldata data
    ) external returns (uint256 amount0, uint256 amount1);

    /// @notice Collects tokens owed to a position
    /// @dev Does not recompute fees earned, which must be done either via mint or burn of any amount of liquidity.
    /// Collect must be called by the position owner. To withdraw only token0 or only token1, amount0Requested or
    /// amount1Requested may be set to zero. To withdraw all tokens owed, caller may pass any value greater than the
    /// actual tokens owed, e.g. type(uint128).max. Tokens owed may be from accumulated swap fees or burned liquidity.
    /// @param recipient The address which should receive the fees collected
    /// @param tickLower The lower tick of the position for which to collect fees
    /// @param tickUpper The upper tick of the position for which to collect fees
    /// @param amount0Requested How much token0 should be withdrawn from the fees owed
    /// @param amount1Requested How much token1 should be withdrawn from the fees owed
    /// @return amount0 The amount of fees collected in token0
    /// @return amount1 The amount of fees collected in token1
    function collect(
        address recipient,
        int24 tickLower,
        int24 tickUpper,
        uint128 amount0Requested,
        uint128 amount1Requested
    ) external returns (uint128 amount0, uint128 amount1);

    /// @notice Burn liquidity from the sender and account tokens owed for the liquidity to the position
    /// @dev Can be used to trigger a recalculation of fees owed to a position by calling with an amount of 0
    /// @dev Fees must be collected separately via a call to #collect
    /// @param tickLower The lower tick of the position for which to burn liquidity
    /// @param tickUpper The upper tick of the position for which to burn liquidity
    /// @param amount How much liquidity to burn
    /// @return amount0 The amount of token0 sent to the recipient
    /// @return amount1 The amount of token1 sent to the recipient
    function burn(
        int24 tickLower,
        int24 tickUpper,
        uint128 amount
    ) external returns (uint256 amount0, uint256 amount1);

    /// @notice Swap token0 for token1, or token1 for token0
    /// @dev The caller of this method receives a callback in the form of IUniswapV3SwapCallback#uniswapV3SwapCallback
    /// @param recipient The address to receive the output of the swap
    /// @param zeroForOne The direction of the swap, true for token0 to token1, false for token1 to token0
    /// @param amountSpecified The amount of the swap, which implicitly configures the swap as exact input (positive), or exact output (negative)
    /// @param sqrtPriceLimitX96 The Q64.96 sqrt price limit. If zero for one, the price cannot be less than this
    /// value after the swap. If one for zero, the price cannot be greater than this value after the swap
    /// @param data Any data to be passed through to the callback
    /// @return amount0 The delta of the balance of token0 of the pool, exact when negative, minimum when positive
    /// @return amount1 The delta of the balance of token1 of the pool, exact when negative, minimum when positive
    function swap(
        address recipient,
        bool zeroForOne,
        int256 amountSpecified,
        uint160 sqrtPriceLimitX96,
        bytes calldata data
    ) external returns (int256 amount0, int256 amount1);

    /// @notice Receive token0 and/or token1 and pay it back, plus a fee, in the callback
    /// @dev The caller of this method receives a callback in the form of IUniswapV3FlashCallback#uniswapV3FlashCallback
    /// @dev Can be used to donate underlying tokens pro-rata to currently in-range liquidity providers by calling
    /// with 0 amount{0,1} and sending the donation amount(s) from the callback
    /// @param recipient The address which will receive the token0 and token1 amounts
    /// @param amount0 The amount of token0 to send
    /// @param amount1 The amount of token1 to send
    /// @param data Any data to be passed through to the callback
    function flash(
        address recipient,
        uint256 amount0,
        uint256 amount1,
        bytes calldata data
    ) external;

    /// @notice Increase the maximum number of price and liquidity observations that this pool will store
    /// @dev This method is no-op if the pool already has an observationCardinalityNext greater than or equal to
    /// the input observationCardinalityNext.
    /// @param observationCardinalityNext The desired minimum number of observations for the pool to store
    function increaseObservationCardinalityNext(uint16 observationCardinalityNext) external;
}

// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolOwnerActions.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Permissioned pool actions
/// @notice Contains pool methods that may only be called by the factory owner
interface IUniswapV3PoolOwnerActions {
    /// @notice Set the denominator of the protocol's % share of the fees
    /// @param feeProtocol0 new protocol fee for token0 of the pool
    /// @param feeProtocol1 new protocol fee for token1 of the pool
    function setFeeProtocol(uint8 feeProtocol0, uint8 feeProtocol1) external;

    /// @notice Collect the protocol fee accrued to the pool
    /// @param recipient The address to which collected protocol fees should be sent
    /// @param amount0Requested The maximum amount of token0 to send, can be 0 to collect fees in only token1
    /// @param amount1Requested The maximum amount of token1 to send, can be 0 to collect fees in only token0
    /// @return amount0 The protocol fee collected in token0
    /// @return amount1 The protocol fee collected in token1
    function collectProtocol(
        address recipient,
        uint128 amount0Requested,
        uint128 amount1Requested
    ) external returns (uint128 amount0, uint128 amount1);
}

// File: @uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolEvents.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Events emitted by a pool
/// @notice Contains all events emitted by the pool
interface IUniswapV3PoolEvents {
    /// @notice Emitted exactly once by a pool when #initialize is first called on the pool
    /// @dev Mint/Burn/Swap cannot be emitted by the pool before Initialize
    /// @param sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96
    /// @param tick The initial tick of the pool, i.e. log base 1.0001 of the starting price of the pool
    event Initialize(uint160 sqrtPriceX96, int24 tick);

    /// @notice Emitted when liquidity is minted for a given position
    /// @param sender The address that minted the liquidity
    /// @param owner The owner of the position and recipient of any minted liquidity
    /// @param tickLower The lower tick of the position
    /// @param tickUpper The upper tick of the position
    /// @param amount The amount of liquidity minted to the position range
    /// @param amount0 How much token0 was required for the minted liquidity
    /// @param amount1 How much token1 was required for the minted liquidity
    event Mint(
        address sender,
        address indexed owner,
        int24 indexed tickLower,
        int24 indexed tickUpper,
        uint128 amount,
        uint256 amount0,
        uint256 amount1
    );

    /// @notice Emitted when fees are collected by the owner of a position
    /// @dev Collect events may be emitted with zero amount0 and amount1 when the caller chooses not to collect fees
    /// @param owner The owner of the position for which fees are collected
    /// @param tickLower The lower tick of the position
    /// @param tickUpper The upper tick of the position
    /// @param amount0 The amount of token0 fees collected
    /// @param amount1 The amount of token1 fees collected
    event Collect(
        address indexed owner,
        address recipient,
        int24 indexed tickLower,
        int24 indexed tickUpper,
        uint128 amount0,
        uint128 amount1
    );

    /// @notice Emitted when a position's liquidity is removed
    /// @dev Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect
    /// @param owner The owner of the position for which liquidity is removed
    /// @param tickLower The lower tick of the position
    /// @param tickUpper The upper tick of the position
    /// @param amount The amount of liquidity to remove
    /// @param amount0 The amount of token0 withdrawn
    /// @param amount1 The amount of token1 withdrawn
    event Burn(
        address indexed owner,
        int24 indexed tickLower,
        int24 indexed tickUpper,
        uint128 amount,
        uint256 amount0,
        uint256 amount1
    );

    /// @notice Emitted by the pool for any swaps between token0 and token1
    /// @param sender The address that initiated the swap call, and that received the callback
    /// @param recipient The address that received the output of the swap
    /// @param amount0 The delta of the token0 balance of the pool
    /// @param amount1 The delta of the token1 balance of the pool
    /// @param sqrtPriceX96 The sqrt(price) of the pool after the swap, as a Q64.96
    /// @param liquidity The liquidity of the pool after the swap
    /// @param tick The log base 1.0001 of price of the pool after the swap
    event Swap(
        address indexed sender,
        address indexed recipient,
        int256 amount0,
        int256 amount1,
        uint160 sqrtPriceX96,
        uint128 liquidity,
        int24 tick
    );

    /// @notice Emitted by the pool for any flashes of token0/token1
    /// @param sender The address that initiated the swap call, and that received the callback
    /// @param recipient The address that received the tokens from flash
    /// @param amount0 The amount of token0 that was flashed
    /// @param amount1 The amount of token1 that was flashed
    /// @param paid0 The amount of token0 paid for the flash, which can exceed the amount0 plus the fee
    /// @param paid1 The amount of token1 paid for the flash, which can exceed the amount1 plus the fee
    event Flash(
        address indexed sender,
        address indexed recipient,
        uint256 amount0,
        uint256 amount1,
        uint256 paid0,
        uint256 paid1
    );

    /// @notice Emitted by the pool for increases to the number of observations that can be stored
    /// @dev observationCardinalityNext is not the observation cardinality until an observation is written at the index
    /// just before a mint/swap/burn.
    /// @param observationCardinalityNextOld The previous value of the next observation cardinality
    /// @param observationCardinalityNextNew The updated value of the next observation cardinality
    event IncreaseObservationCardinalityNext(
        uint16 observationCardinalityNextOld,
        uint16 observationCardinalityNextNew
    );

    /// @notice Emitted when the protocol fee is changed by the pool
    /// @param feeProtocol0Old The previous value of the token0 protocol fee
    /// @param feeProtocol1Old The previous value of the token1 protocol fee
    /// @param feeProtocol0New The updated value of the token0 protocol fee
    /// @param feeProtocol1New The updated value of the token1 protocol fee
    event SetFeeProtocol(uint8 feeProtocol0Old, uint8 feeProtocol1Old, uint8 feeProtocol0New, uint8 feeProtocol1New);

    /// @notice Emitted when the collected protocol fees are withdrawn by the factory owner
    /// @param sender The address that collects the protocol fees
    /// @param recipient The address that receives the collected protocol fees
    /// @param amount0 The amount of token0 protocol fees that is withdrawn
    /// @param amount0 The amount of token1 protocol fees that is withdrawn
    event CollectProtocol(address indexed sender, address indexed recipient, uint128 amount0, uint128 amount1);
}

// File: @openzeppelin/contracts/math/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: @openzeppelin/contracts/token/ERC20/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: @openzeppelin/contracts/access/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: @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol



pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

// File: contracts/fund/ShareStaking.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";

import "../utils/SafeDecimalMath.sol";
import "../utils/CoreUtility.sol";

import "../interfaces/IFundV3.sol";
import "../interfaces/IChessController.sol";
import "../interfaces/IChessSchedule.sol";
import "../interfaces/ITrancheIndexV2.sol";
import "../interfaces/IVotingEscrow.sol";

contract ShareStaking is ITrancheIndexV2, CoreUtility {
    using Math for uint256;
    using SafeMath for uint256;
    using SafeDecimalMath for uint256;
    using SafeERC20 for IERC20;

    event Deposited(uint256 tranche, address account, uint256 amount);
    event Withdrawn(uint256 tranche, address account, uint256 amount);

    uint256 private constant MAX_ITERATIONS = 500;

    uint256 private constant REWARD_WEIGHT_B = 2;
    uint256 private constant REWARD_WEIGHT_R = 1;
    uint256 private constant REWARD_WEIGHT_Q = 3;
    uint256 private constant MAX_BOOSTING_FACTOR = 3e18;
    uint256 private constant MAX_BOOSTING_FACTOR_MINUS_ONE = MAX_BOOSTING_FACTOR - 1e18;

    IFundV3 public immutable fund;

    /// @notice The Chess release schedule contract.
    IChessSchedule public immutable chessSchedule;

    /// @notice The controller contract.
    IChessController public immutable chessController;

    IVotingEscrow private immutable _votingEscrow;

    /// @notice Timestamp when rewards start.
    uint256 public immutable rewardStartTimestamp;

    /// @dev Per-fund CHESS emission rate. The product of CHESS emission rate
    ///      and weekly percentage of the fund
    uint256 private _rate;

    /// @dev Total amount of user shares, i.e. sum of all entries in `_balances`.
    uint256[TRANCHE_COUNT] private _totalSupplies;

    /// @dev Rebalance version of `_totalSupplies`.
    uint256 private _totalSupplyVersion;

    /// @dev Amount of shares staked by each user.
    mapping(address => uint256[TRANCHE_COUNT]) private _balances;

    /// @dev Rebalance version mapping for `_balances`.
    mapping(address => uint256) private _balanceVersions;

    /// @dev Mapping of rebalance version => split ratio.
    mapping(uint256 => uint256) private _historicalSplitRatio;

    /// @dev 1e27 * ∫(rate(t) / totalWeight(t) dt) from the latest rebalance till checkpoint.
    uint256 private _invTotalWeightIntegral;

    /// @dev Final `_invTotalWeightIntegral` before each rebalance.
    ///      These values are accessed in a loop in `_userCheckpoint()` with bounds checking.
    ///      So we store them in a fixed-length array, in order to make compiler-generated
    ///      bounds checking on every access cheaper. The actual length of this array is stored in
    ///      `_historicalIntegralSize` and should be explicitly checked when necessary.
    uint256[65535] private _historicalIntegrals;

    /// @dev Actual length of the `_historicalIntegrals` array, which always equals to the number of
    ///      historical rebalances after `checkpoint()` is called.
    uint256 private _historicalIntegralSize;

    /// @dev Timestamp when checkpoint() is called.
    uint256 private _checkpointTimestamp;

    /// @dev Snapshot of `_invTotalWeightIntegral` per user.
    mapping(address => uint256) private _userIntegrals;

    /// @dev Mapping of account => claimable rewards.
    mapping(address => uint256) private _claimableRewards;

    uint256 private _workingSupply;
    mapping(address => uint256) private _workingBalances;

    constructor(
        address fund_,
        address chessSchedule_,
        address chessController_,
        address votingEscrow_,
        uint256 rewardStartTimestamp_
    ) public {
        fund = IFundV3(fund_);
        chessSchedule = IChessSchedule(chessSchedule_);
        chessController = IChessController(chessController_);
        _votingEscrow = IVotingEscrow(votingEscrow_);
        rewardStartTimestamp = rewardStartTimestamp_;
        _checkpointTimestamp = block.timestamp;
    }

    function getRate() external view returns (uint256) {
        return _rate / 1e18;
    }

    /// @notice Return weight of given balance with respect to rewards.
    /// @param amountQ Amount of QUEEN
    /// @param amountB Amount of BISHOP
    /// @param amountR Amount of ROOK
    /// @param splitRatio Split ratio
    /// @return Rewarding weight of the balance
    function weightedBalance(
        uint256 amountQ,
        uint256 amountB,
        uint256 amountR,
        uint256 splitRatio
    ) public pure returns (uint256) {
        return
            amountQ
                .mul(REWARD_WEIGHT_Q)
                .multiplyDecimal(splitRatio)
                .add(amountB.mul(REWARD_WEIGHT_B))
                .add(amountR.mul(REWARD_WEIGHT_R))
                .div(REWARD_WEIGHT_Q);
    }

    function totalSupply(uint256 tranche) external view returns (uint256) {
        uint256 totalSupplyQ = _totalSupplies[TRANCHE_Q];
        uint256 totalSupplyB = _totalSupplies[TRANCHE_B];
        uint256 totalSupplyR = _totalSupplies[TRANCHE_R];

        uint256 version = _totalSupplyVersion;
        uint256 rebalanceSize = _fundRebalanceSize();
        if (version < rebalanceSize) {
            (totalSupplyQ, totalSupplyB, totalSupplyR) = _fundBatchRebalance(
                totalSupplyQ,
                totalSupplyB,
                totalSupplyR,
                version,
                rebalanceSize
            );
        }

        if (tranche == TRANCHE_Q) {
            return totalSupplyQ;
        } else if (tranche == TRANCHE_B) {
            return totalSupplyB;
        } else {
            return totalSupplyR;
        }
    }

    function trancheBalanceOf(uint256 tranche, address account) external view returns (uint256) {
        uint256 amountQ = _balances[account][TRANCHE_Q];
        uint256 amountB = _balances[account][TRANCHE_B];
        uint256 amountR = _balances[account][TRANCHE_R];

        if (tranche == TRANCHE_Q) {
            if (amountQ == 0 && amountB == 0 && amountR == 0) return 0;
        } else if (tranche == TRANCHE_B) {
            if (amountB == 0) return 0;
        } else {
            if (amountR == 0) return 0;
        }

        uint256 version = _balanceVersions[account];
        uint256 rebalanceSize = _fundRebalanceSize();
        if (version < rebalanceSize) {
            (amountQ, amountB, amountR) = _fundBatchRebalance(
                amountQ,
                amountB,
                amountR,
                version,
                rebalanceSize
            );
        }

        if (tranche == TRANCHE_Q) {
            return amountQ;
        } else if (tranche == TRANCHE_B) {
            return amountB;
        } else {
            return amountR;
        }
    }

    function balanceVersion(address account) external view returns (uint256) {
        return _balanceVersions[account];
    }

    function workingSupply() external view returns (uint256) {
        uint256 version = _totalSupplyVersion;
        uint256 rebalanceSize = _fundRebalanceSize();
        if (version < rebalanceSize) {
            (uint256 totalSupplyQ, uint256 totalSupplyB, uint256 totalSupplyR) =
                _fundBatchRebalance(
                    _totalSupplies[TRANCHE_Q],
                    _totalSupplies[TRANCHE_B],
                    _totalSupplies[TRANCHE_R],
                    version,
                    rebalanceSize
                );
            return weightedBalance(totalSupplyQ, totalSupplyB, totalSupplyR, fund.splitRatio());
        } else {
            return _workingSupply;
        }
    }

    function workingBalanceOf(address account) external view returns (uint256) {
        uint256 version = _balanceVersions[account];
        uint256 rebalanceSize = _fundRebalanceSize();
        uint256 workingBalance = _workingBalances[account]; // gas saver
        if (version < rebalanceSize || workingBalance == 0) {
            uint256[TRANCHE_COUNT] storage balance = _balances[account];
            uint256 amountQ = balance[TRANCHE_Q];
            uint256 amountB = balance[TRANCHE_B];
            uint256 amountR = balance[TRANCHE_R];
            if (version < rebalanceSize) {
                (amountQ, amountB, amountR) = _fundBatchRebalance(
                    amountQ,
                    amountB,
                    amountR,
                    version,
                    rebalanceSize
                );
            }
            return weightedBalance(amountQ, amountB, amountR, fund.splitRatio());
        } else {
            return workingBalance;
        }
    }

    function _fundRebalanceSize() internal view returns (uint256) {
        return fund.getRebalanceSize();
    }

    function _fundDoRebalance(
        uint256 amountQ,
        uint256 amountB,
        uint256 amountR,
        uint256 index
    )
        internal
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        return fund.doRebalance(amountQ, amountB, amountR, index);
    }

    function _fundBatchRebalance(
        uint256 amountQ,
        uint256 amountB,
        uint256 amountR,
        uint256 fromIndex,
        uint256 toIndex
    )
        internal
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        return fund.batchRebalance(amountQ, amountB, amountR, fromIndex, toIndex);
    }

    /// @dev Stake share tokens. A user could send QUEEN before deposit().
    ///      The contract first measures how much tranche share it has received,
    ///      then transfer the rest from the user
    /// @param tranche Tranche of the share
    /// @param amount The amount to deposit
    /// @param recipient Address that receives deposit
    /// @param version The current rebalance version
    function deposit(
        uint256 tranche,
        uint256 amount,
        address recipient,
        uint256 version
    ) external {
        _checkpoint(version);
        _userCheckpoint(recipient, version);
        _balances[recipient][tranche] = _balances[recipient][tranche].add(amount);
        uint256 oldTotalSupply = _totalSupplies[tranche];
        _totalSupplies[tranche] = oldTotalSupply.add(amount);
        _updateWorkingBalance(recipient, version);
        uint256 spareAmount = fund.trancheBalanceOf(tranche, address(this)).sub(oldTotalSupply);
        if (spareAmount < amount) {
            // Retain the rest of share token (version is checked by the fund)
            fund.trancheTransferFrom(
                tranche,
                msg.sender,
                address(this),
                amount - spareAmount,
                version
            );
        } else {
            require(version == _fundRebalanceSize(), "Invalid version");
        }
        emit Deposited(tranche, recipient, amount);
    }

    /// @notice Unstake tranche tokens.
    /// @param tranche Tranche of the share
    /// @param amount The amount to withdraw
    /// @param version The current rebalance version
    function withdraw(
        uint256 tranche,
        uint256 amount,
        uint256 version
    ) external {
        _checkpoint(version);
        _userCheckpoint(msg.sender, version);
        _balances[msg.sender][tranche] = _balances[msg.sender][tranche].sub(
            amount,
            "Insufficient balance to withdraw"
        );
        _totalSupplies[tranche] = _totalSupplies[tranche].sub(amount);
        _updateWorkingBalance(msg.sender, version);
        // version is checked by the fund
        fund.trancheTransfer(tranche, msg.sender, amount, version);
        emit Withdrawn(tranche, msg.sender, amount);
    }

    /// @notice Transform share balance to a given rebalance version, or to the latest version
    ///         if `targetVersion` is zero.
    /// @param account Account of the balance to rebalance
    /// @param targetVersion The target rebalance version, or zero for the latest version
    function refreshBalance(address account, uint256 targetVersion) external {
        uint256 rebalanceSize = _fundRebalanceSize();
        if (targetVersion == 0) {
            targetVersion = rebalanceSize;
        } else {
            require(targetVersion <= rebalanceSize, "Target version out of bound");
        }
        _checkpoint(rebalanceSize);
        _userCheckpoint(account, targetVersion);
    }

    /// @notice Return claimable rewards of an account till now.
    ///
    ///         This function should be call as a "view" function off-chain to get
    ///         the return value, e.g. using `contract.claimableRewards.call(account)` in web3
    ///         or `contract.callStatic.claimableRewards(account)` in ethers.js.
    /// @param account Address of an account
    /// @return Amount of claimable rewards
    function claimableRewards(address account) external returns (uint256) {
        uint256 rebalanceSize = _fundRebalanceSize();
        _checkpoint(rebalanceSize);
        _userCheckpoint(account, rebalanceSize);
        return _claimableRewards[account];
    }

    /// @notice Claim the rewards for an account.
    /// @param account Account to claim its rewards
    function claimRewards(address account) external {
        uint256 rebalanceSize = _fundRebalanceSize();
        _checkpoint(rebalanceSize);
        _userCheckpoint(account, rebalanceSize);
        uint256 amount = _claimableRewards[account];
        _claimableRewards[account] = 0;
        chessSchedule.mint(account, amount);
        _updateWorkingBalance(account, rebalanceSize);
    }

    /// @notice Synchronize an account's locked Chess with `VotingEscrow`
    ///         and update its working balance.
    /// @param account Address of the synchronized account
    function syncWithVotingEscrow(address account) external {
        uint256 rebalanceSize = _fundRebalanceSize();
        _checkpoint(rebalanceSize);
        _userCheckpoint(account, rebalanceSize);
        _updateWorkingBalance(account, rebalanceSize);
    }

    /// @dev Transform total supplies to the latest rebalance version and make a global reward checkpoint.
    /// @param rebalanceSize The number of existing rebalances. It must be the same as
    ///                       `fund.getRebalanceSize()`.
    function _checkpoint(uint256 rebalanceSize) private {
        uint256 timestamp = _checkpointTimestamp;
        if (timestamp >= block.timestamp) {
            return;
        }

        uint256 integral = _invTotalWeightIntegral;
        uint256 endWeek = _endOfWeek(timestamp);
        uint256 version = _totalSupplyVersion;
        uint256 rebalanceTimestamp;
        if (version < rebalanceSize) {
            rebalanceTimestamp = fund.getRebalanceTimestamp(version);
        } else {
            rebalanceTimestamp = type(uint256).max;
        }
        uint256 rate = _rate;
        uint256 totalSupplyQ = _totalSupplies[TRANCHE_Q];
        uint256 totalSupplyB = _totalSupplies[TRANCHE_B];
        uint256 totalSupplyR = _totalSupplies[TRANCHE_R];
        uint256 weight = _workingSupply;
        uint256 timestamp_ = timestamp; // avoid stack too deep

        for (uint256 i = 0; i < MAX_ITERATIONS && timestamp_ < block.timestamp; i++) {
            uint256 endTimestamp = rebalanceTimestamp.min(endWeek).min(block.timestamp);

            if (weight > 0 && endTimestamp > rewardStartTimestamp) {
                integral = integral.add(
                    rate
                        .mul(endTimestamp.sub(timestamp_.max(rewardStartTimestamp)))
                        .decimalToPreciseDecimal()
                        .div(weight)
                );
            }

            if (endTimestamp == rebalanceTimestamp) {
                uint256 oldSize = _historicalIntegralSize;
                _historicalIntegrals[oldSize] = integral;
                _historicalIntegralSize = oldSize + 1;

                integral = 0;
                (totalSupplyQ, totalSupplyB, totalSupplyR) = _fundDoRebalance(
                    totalSupplyQ,
                    totalSupplyB,
                    totalSupplyR,
                    version
                );

                version++;
                {
                    // Reset total weight boosting after the first rebalance
                    uint256 splitRatio = fund.historicalSplitRatio(version);
                    weight = weightedBalance(totalSupplyQ, totalSupplyB, totalSupplyR, splitRatio);
                    _historicalSplitRatio[version] = splitRatio;
                }

                if (version < rebalanceSize) {
                    rebalanceTimestamp = fund.getRebalanceTimestamp(version);
                } else {
                    rebalanceTimestamp = type(uint256).max;
                }
            }
            if (endTimestamp == endWeek) {
                rate = chessSchedule.getRate(endWeek).mul(
                    chessController.getFundRelativeWeight(address(this), endWeek)
                );
                if (endWeek < rewardStartTimestamp && endWeek + 1 weeks > rewardStartTimestamp) {
                    // Rewards start in the middle of the next week. We adjust the rate to
                    // compensate for the period between `endWeek` and `rewardStartTimestamp`.
                    rate = rate.mul(1 weeks).div(endWeek + 1 weeks - rewardStartTimestamp);
                }
                endWeek += 1 weeks;
            }

            timestamp_ = endTimestamp;
        }

        _checkpointTimestamp = block.timestamp;
        _invTotalWeightIntegral = integral;
        _rate = rate;
        if (_totalSupplyVersion != rebalanceSize) {
            _totalSupplies[TRANCHE_Q] = totalSupplyQ;
            _totalSupplies[TRANCHE_B] = totalSupplyB;
            _totalSupplies[TRANCHE_R] = totalSupplyR;
            _totalSupplyVersion = rebalanceSize;
            // Reset total working weight before any boosting if rebalance ever triggered
            _workingSupply = weight;
        }
    }

    /// @dev Transform a user's balance to a given rebalance version and update this user's rewards.
    ///
    ///      In most cases, the target version is the latest version and this function cumulates
    ///      rewards till now. When this function is called from `refreshBalance()`,
    ///      `targetVersion` can be an older version, in which case rewards are cumulated till
    ///      the end of that version (i.e. timestamp of the transaction triggering the rebalance
    ///      with index `targetVersion`).
    ///
    ///      This function should always be called after `_checkpoint()` is called, so that
    ///      the global reward checkpoint is guarenteed up to date.
    /// @param account Account to update
    /// @param targetVersion The target rebalance version
    function _userCheckpoint(address account, uint256 targetVersion) private {
        uint256 oldVersion = _balanceVersions[account];
        if (oldVersion > targetVersion) {
            return;
        }
        uint256 userIntegral = _userIntegrals[account];
        uint256 integral;
        // This scope is to avoid the "stack too deep" error.
        {
            // We assume that this function is always called immediately after `_checkpoint()`,
            // which guarantees that `_historicalIntegralSize` equals to the number of historical
            // rebalances.
            uint256 rebalanceSize = _historicalIntegralSize;
            integral = targetVersion == rebalanceSize
                ? _invTotalWeightIntegral
                : _historicalIntegrals[targetVersion];
        }
        if (userIntegral == integral && oldVersion == targetVersion) {
            // Return immediately when the user's rewards have already been updated to
            // the target version.
            return;
        }

        uint256 rewards = _claimableRewards[account];
        uint256[TRANCHE_COUNT] storage balance = _balances[account];
        uint256 weight = _workingBalances[account];
        uint256 balanceQ = balance[TRANCHE_Q];
        uint256 balanceB = balance[TRANCHE_B];
        uint256 balanceR = balance[TRANCHE_R];
        for (uint256 i = oldVersion; i < targetVersion; i++) {
            rewards = rewards.add(
                weight.multiplyDecimalPrecise(_historicalIntegrals[i].sub(userIntegral))
            );
            if (balanceQ != 0 || balanceB != 0 || balanceR != 0) {
                (balanceQ, balanceB, balanceR) = _fundDoRebalance(balanceQ, balanceB, balanceR, i);
            }
            userIntegral = 0;

            // Reset per-user weight boosting after the first rebalance
            weight = weightedBalance(balanceQ, balanceB, balanceR, _historicalSplitRatio[i + 1]);
        }
        rewards = rewards.add(weight.multiplyDecimalPrecise(integral.sub(userIntegral)));
        address account_ = account; // Fix the "stack too deep" error
        _claimableRewards[account_] = rewards;
        _userIntegrals[account_] = integral;

        if (oldVersion < targetVersion) {
            balance[TRANCHE_Q] = balanceQ;
            balance[TRANCHE_B] = balanceB;
            balance[TRANCHE_R] = balanceR;
            _balanceVersions[account_] = targetVersion;
            _workingBalances[account_] = weight;
        }
    }

    /// @dev Calculate working balance, which depends on the amount of staked tokens and veCHESS.
    ///      Before this function is called, both `_checkpoint()` and `_userCheckpoint(account)`
    ///      should be called to update `_workingSupply` and `_workingBalances[account]` to
    ///      the latest rebalance version.
    /// @param account User address
    /// @param rebalanceSize The number of existing rebalances. It must be the same as
    ///                       `fund.getRebalanceSize()`.
    function _updateWorkingBalance(address account, uint256 rebalanceSize) private {
        uint256 splitRatio = _historicalSplitRatio[rebalanceSize];
        if (splitRatio == 0) {
            // Read it from the fund in case that it's not initialized yet, e.g. when we reach here
            // for the first time and `rebalanceSize` is zero.
            splitRatio = fund.historicalSplitRatio(rebalanceSize);
            _historicalSplitRatio[rebalanceSize] = splitRatio;
        }
        uint256 weightedSupply =
            weightedBalance(
                _totalSupplies[TRANCHE_Q],
                _totalSupplies[TRANCHE_B],
                _totalSupplies[TRANCHE_R],
                splitRatio
            );
        uint256[TRANCHE_COUNT] storage balance = _balances[account];
        uint256 newWorkingBalance =
            weightedBalance(balance[TRANCHE_Q], balance[TRANCHE_B], balance[TRANCHE_R], splitRatio);
        uint256 veBalance = _votingEscrow.balanceOf(account);
        if (veBalance > 0) {
            uint256 veTotalSupply = _votingEscrow.totalSupply();
            uint256 maxWorkingBalance = newWorkingBalance.multiplyDecimal(MAX_BOOSTING_FACTOR);
            uint256 boostedWorkingBalance =
                newWorkingBalance.add(
                    weightedSupply
                        .mul(veBalance)
                        .multiplyDecimal(MAX_BOOSTING_FACTOR_MINUS_ONE)
                        .div(veTotalSupply)
                );
            newWorkingBalance = maxWorkingBalance.min(boostedWorkingBalance);
        }

        _workingSupply = _workingSupply.sub(_workingBalances[account]).add(newWorkingBalance);
        _workingBalances[account] = newWorkingBalance;
    }
}

// File: contracts/interfaces/ITranchessSwapCallee.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

interface ITranchessSwapCallee {
    function tranchessSwapCallback(
        uint256 baseDeltaOut,
        uint256 quoteDeltaOut,
        bytes calldata data
    ) external;
}

// File: contracts/interfaces/IPrimaryMarketV3.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

interface IPrimaryMarketV3 {
    function fund() external view returns (address);

    function getCreation(uint256 underlying) external view returns (uint256 outQ);

    function getCreationForQ(uint256 minOutQ) external view returns (uint256 underlying);

    function getRedemption(uint256 inQ) external view returns (uint256 underlying, uint256 fee);

    function getRedemptionForUnderlying(uint256 minUnderlying) external view returns (uint256 inQ);

    function getSplit(uint256 inQ) external view returns (uint256 outB);

    function getSplitForB(uint256 minOutB) external view returns (uint256 inQ);

    function getMerge(uint256 inB) external view returns (uint256 outQ, uint256 feeQ);

    function getMergeForQ(uint256 minOutQ) external view returns (uint256 inB);

    function canBeRemovedFromFund() external view returns (bool);

    function create(
        address recipient,
        uint256 minOutQ,
        uint256 version
    ) external returns (uint256 outQ);

    function redeem(
        address recipient,
        uint256 inQ,
        uint256 minUnderlying,
        uint256 version
    ) external returns (uint256 underlying);

    function redeemAndUnwrap(
        address recipient,
        uint256 inQ,
        uint256 minUnderlying,
        uint256 version
    ) external returns (uint256 underlying);

    function queueRedemption(
        address recipient,
        uint256 inQ,
        uint256 minUnderlying,
        uint256 version
    ) external returns (uint256 underlying, uint256 index);

    function claimRedemptions(address account, uint256[] calldata indices)
        external
        returns (uint256 underlying);

    function claimRedemptionsAndUnwrap(address account, uint256[] calldata indices)
        external
        returns (uint256 underlying);

    function split(
        address recipient,
        uint256 inQ,
        uint256 version
    ) external returns (uint256 outB);

    function merge(
        address recipient,
        uint256 inB,
        uint256 version
    ) external returns (uint256 outQ);

    function settle(uint256 day) external;
}

// File: contracts/interfaces/ISwapRouter.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

import "./IStableSwap.sol";

interface ISwapRouter {
    function getSwap(address baseToken, address quoteToken) external view returns (IStableSwap);

    function getAmountsOut(uint256 amount, address[] memory path)
        external
        view
        returns (
            uint256[] memory amounts,
            IStableSwap[] memory swaps,
            bool[] memory isBuy
        );

    function getAmountsIn(uint256 amount, address[] memory path)
        external
        view
        returns (
            uint256[] memory amounts,
            IStableSwap[] memory swaps,
            bool[] memory isBuy
        );

    function addLiquidity(
        address baseToken,
        address quoteToken,
        uint256 baseDelta,
        uint256 quoteDelta,
        uint256 minMintAmount,
        uint256 version,
        uint256 deadline
    ) external payable;

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 minAmountOut,
        address[] calldata path,
        address recipient,
        address staking,
        uint256[] calldata versions,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 maxAmountIn,
        address[] calldata path,
        address recipient,
        address staking,
        uint256[] calldata versions,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapExactTokensForTokensUnwrap(
        uint256 amountIn,
        uint256 minAmountOut,
        address[] calldata path,
        address recipient,
        uint256[] calldata versions,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapTokensForExactTokensUnwrap(
        uint256 amountOut,
        uint256 maxAmountIn,
        address[] calldata path,
        address recipient,
        uint256[] calldata versions,
        uint256 deadline
    ) external returns (uint256[] memory amounts);
}

// File: contracts/interfaces/ITrancheIndexV2.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

/// @notice Amounts of QUEEN, BISHOP and ROOK are sometimes stored in a `uint256[3]` array.
///         This contract defines index of each tranche in this array.
///
///         Solidity does not allow constants to be defined in interfaces. So this contract follows
///         the naming convention of interfaces but is implemented as an `abstract contract`.
abstract contract ITrancheIndexV2 {
    uint256 internal constant TRANCHE_Q = 0;
    uint256 internal constant TRANCHE_B = 1;
    uint256 internal constant TRANCHE_R = 2;

    uint256 internal constant TRANCHE_COUNT = 3;
}

// File: @openzeppelin/contracts/token/ERC20/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: @openzeppelin/contracts/utils/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: @openzeppelin/contracts/utils/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;
    }
}

// File: @openzeppelin/contracts/math/Math.sol



// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

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

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

// File: contracts/utils/SafeDecimalMath.sol



// SPDX-License-Identifier: MIT
//
// Copyright (c) 2019 Synthetix
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
pragma solidity >=0.6.10 <0.8.0;

import "@openzeppelin/contracts/math/SafeMath.sol";

library SafeDecimalMath {
    using SafeMath for uint256;

    /* Number of decimal places in the representations. */
    uint256 private constant decimals = 18;
    uint256 private constant highPrecisionDecimals = 27;

    /* The number representing 1.0. */
    uint256 private constant UNIT = 10**uint256(decimals);

    /* The number representing 1.0 for higher fidelity numbers. */
    uint256 private constant PRECISE_UNIT = 10**uint256(highPrecisionDecimals);
    uint256 private constant UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR =
        10**uint256(highPrecisionDecimals - decimals);

    /**
     * @return The result of multiplying x and y, interpreting the operands as fixed-point
     * decimals.
     *
     * @dev A unit factor is divided out after the product of x and y is evaluated,
     * so that product must be less than 2**256. As this is an integer division,
     * the internal division always rounds down. This helps save on gas. Rounding
     * is more expensive on gas.
     */
    function multiplyDecimal(uint256 x, uint256 y) internal pure returns (uint256) {
        /* Divide by UNIT to remove the extra factor introduced by the product. */
        return x.mul(y).div(UNIT);
    }

    function multiplyDecimalPrecise(uint256 x, uint256 y) internal pure returns (uint256) {
        /* Divide by UNIT to remove the extra factor introduced by the product. */
        return x.mul(y).div(PRECISE_UNIT);
    }

    /**
     * @return The result of safely dividing x and y. The return value is a high
     * precision decimal.
     *
     * @dev y is divided after the product of x and the standard precision unit
     * is evaluated, so the product of x and UNIT must be less than 2**256. As
     * this is an integer division, the result is always rounded down.
     * This helps save on gas. Rounding is more expensive on gas.
     */
    function divideDecimal(uint256 x, uint256 y) internal pure returns (uint256) {
        /* Reintroduce the UNIT factor that will be divided out by y. */
        return x.mul(UNIT).div(y);
    }

    function divideDecimalPrecise(uint256 x, uint256 y) internal pure returns (uint256) {
        /* Reintroduce the UNIT factor that will be divided out by y. */
        return x.mul(PRECISE_UNIT).div(y);
    }

    /**
     * @dev Convert a standard decimal representation to a high precision one.
     */
    function decimalToPreciseDecimal(uint256 i) internal pure returns (uint256) {
        return i.mul(UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR);
    }

    /**
     * @dev Convert a high precision decimal to a standard decimal representation.
     */
    function preciseDecimalToDecimal(uint256 i) internal pure returns (uint256) {
        uint256 quotientTimesTen = i.mul(10).div(UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR);

        if (quotientTimesTen % 10 >= 5) {
            quotientTimesTen = quotientTimesTen.add(10);
        }

        return quotientTimesTen.div(10);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, and the max value of
     * uint256 on overflow.
     */
    function saturatingMul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        return c / a != b ? type(uint256).max : c;
    }

    function saturatingMultiplyDecimal(uint256 x, uint256 y) internal pure returns (uint256) {
        /* Divide by UNIT to remove the extra factor introduced by the product. */
        return saturatingMul(x, y).div(UNIT);
    }
}

// File: contracts/utils/CoreUtility.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

import "@openzeppelin/contracts/math/SafeMath.sol";

abstract contract CoreUtility {
    using SafeMath for uint256;

    /// @dev UTC time of a day when the fund settles.
    uint256 internal constant SETTLEMENT_TIME = 14 hours;

    /// @dev Return end timestamp of the trading week containing a given timestamp.
    ///
    ///      A trading week starts at UTC time `SETTLEMENT_TIME` on a Thursday (inclusive)
    ///      and ends at the same time of the next Thursday (exclusive).
    /// @param timestamp The given timestamp
    /// @return End timestamp of the trading week.
    function _endOfWeek(uint256 timestamp) internal pure returns (uint256) {
        return ((timestamp.add(1 weeks) - SETTLEMENT_TIME) / 1 weeks) * 1 weeks + SETTLEMENT_TIME;
    }
}

// File: contracts/interfaces/IFundV3.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;
pragma experimental ABIEncoderV2;

import "./ITwapOracleV2.sol";

interface IFundV3 {
    /// @notice A linear transformation matrix that represents a rebalance.
    ///
    ///         ```
    ///             [        1        0        0 ]
    ///         R = [ ratioB2Q  ratioBR        0 ]
    ///             [ ratioR2Q        0  ratioBR ]
    ///         ```
    ///
    ///         Amounts of the three tranches `q`, `b` and `r` can be rebalanced by multiplying the matrix:
    ///
    ///         ```
    ///         [ q', b', r' ] = [ q, b, r ] * R
    ///         ```
    struct Rebalance {
        uint256 ratioB2Q;
        uint256 ratioR2Q;
        uint256 ratioBR;
        uint256 timestamp;
    }

    function tokenUnderlying() external view returns (address);

    function tokenQ() external view returns (address);

    function tokenB() external view returns (address);

    function tokenR() external view returns (address);

    function tokenShare(uint256 tranche) external view returns (address);

    function primaryMarket() external view returns (address);

    function primaryMarketUpdateProposal() external view returns (address, uint256);

    function strategy() external view returns (address);

    function strategyUpdateProposal() external view returns (address, uint256);

    function underlyingDecimalMultiplier() external view returns (uint256);

    function twapOracle() external view returns (ITwapOracleV2);

    function feeCollector() external view returns (address);

    function endOfDay(uint256 timestamp) external pure returns (uint256);

    function trancheTotalSupply(uint256 tranche) external view returns (uint256);

    function trancheBalanceOf(uint256 tranche, address account) external view returns (uint256);

    function trancheAllBalanceOf(address account)
        external
        view
        returns (
            uint256,
            uint256,
            uint256
        );

    function trancheBalanceVersion(address account) external view returns (uint256);

    function trancheAllowance(
        uint256 tranche,
        address owner,
        address spender
    ) external view returns (uint256);

    function trancheAllowanceVersion(address owner, address spender)
        external
        view
        returns (uint256);

    function trancheTransfer(
        uint256 tranche,
        address recipient,
        uint256 amount,
        uint256 version
    ) external;

    function trancheTransferFrom(
        uint256 tranche,
        address sender,
        address recipient,
        uint256 amount,
        uint256 version
    ) external;

    function trancheApprove(
        uint256 tranche,
        address spender,
        uint256 amount,
        uint256 version
    ) external;

    function getRebalanceSize() external view returns (uint256);

    function getRebalance(uint256 index) external view returns (Rebalance memory);

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

    function currentDay() external view returns (uint256);

    function splitRatio() external view returns (uint256);

    function historicalSplitRatio(uint256 version) external view returns (uint256);

    function fundActivityStartTime() external view returns (uint256);

    function isFundActive(uint256 timestamp) external view returns (bool);

    function getEquivalentTotalB() external view returns (uint256);

    function getEquivalentTotalQ() external view returns (uint256);

    function historicalEquivalentTotalB(uint256 timestamp) external view returns (uint256);

    function historicalNavs(uint256 timestamp) external view returns (uint256 navB, uint256 navR);

    function extrapolateNav(uint256 price)
        external
        view
        returns (
            uint256,
            uint256,
            uint256
        );

    function doRebalance(
        uint256 amountQ,
        uint256 amountB,
        uint256 amountR,
        uint256 index
    )
        external
        view
        returns (
            uint256 newAmountQ,
            uint256 newAmountB,
            uint256 newAmountR
        );

    function batchRebalance(
        uint256 amountQ,
        uint256 amountB,
        uint256 amountR,
        uint256 fromIndex,
        uint256 toIndex
    )
        external
        view
        returns (
            uint256 newAmountQ,
            uint256 newAmountB,
            uint256 newAmountR
        );

    function refreshBalance(address account, uint256 targetVersion) external;

    function refreshAllowance(
        address owner,
        address spender,
        uint256 targetVersion
    ) external;

    function shareTransfer(
        address sender,
        address recipient,
        uint256 amount
    ) external;

    function shareTransferFrom(
        address spender,
        address sender,
        address recipient,
        uint256 amount
    ) external returns (uint256 newAllowance);

    function shareIncreaseAllowance(
        address sender,
        address spender,
        uint256 addedValue
    ) external returns (uint256 newAllowance);

    function shareDecreaseAllowance(
        address sender,
        address spender,
        uint256 subtractedValue
    ) external returns (uint256 newAllowance);

    function shareApprove(
        address owner,
        address spender,
        uint256 amount
    ) external;

    function historicalUnderlying(uint256 timestamp) external view returns (uint256);

    function getTotalUnderlying() external view returns (uint256);

    function getStrategyUnderlying() external view returns (uint256);

    function getTotalDebt() external view returns (uint256);

    event RebalanceTriggered(
        uint256 indexed index,
        uint256 indexed day,
        uint256 navSum,
        uint256 navB,
        uint256 navROrZero,
        uint256 ratioB2Q,
        uint256 ratioR2Q,
        uint256 ratioBR
    );
    event Settled(uint256 indexed day, uint256 navB, uint256 navR, uint256 interestRate);
    event InterestRateUpdated(uint256 baseInterestRate, uint256 floatingInterestRate);
    event BalancesRebalanced(
        address indexed account,
        uint256 version,
        uint256 balanceQ,
        uint256 balanceB,
        uint256 balanceR
    );
    event AllowancesRebalanced(
        address indexed owner,
        address indexed spender,
        uint256 version,
        uint256 allowanceQ,
        uint256 allowanceB,
        uint256 allowanceR
    );
}

// File: contracts/interfaces/IChessController.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

interface IChessController {
    function getFundRelativeWeight(address account, uint256 timestamp) external returns (uint256);
}

// File: contracts/interfaces/IChessSchedule.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

interface IChessSchedule {
    function getWeeklySupply(uint256 timestamp) external view returns (uint256);

    function getRate(uint256 timestamp) external view returns (uint256);

    function mint(address account, uint256 amount) external;

    function addMinter(address account) external;
}

// File: contracts/interfaces/IVotingEscrow.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;
pragma experimental ABIEncoderV2;

interface IAddressWhitelist {
    function check(address account) external view returns (bool);
}

interface IVotingEscrowCallback {
    function syncWithVotingEscrow(address account) external;
}

interface IVotingEscrow {
    struct LockedBalance {
        uint256 amount;
        uint256 unlockTime;
    }

    function token() external view returns (address);

    function maxTime() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function totalSupply() external view returns (uint256);

    function balanceOfAtTimestamp(address account, uint256 timestamp)
        external
        view
        returns (uint256);

    function getTimestampDropBelow(address account, uint256 threshold)
        external
        view
        returns (uint256);

    function getLockedBalance(address account) external view returns (LockedBalance memory);
}

// File: contracts/interfaces/ITwapOracleV2.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

import "./ITwapOracle.sol";

interface ITwapOracleV2 is ITwapOracle {
    function getLatest() external view returns (uint256);
}

// File: contracts/interfaces/ITwapOracle.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

interface ITwapOracle {
    enum UpdateType {PRIMARY, SECONDARY, OWNER, CHAINLINK, UNISWAP_V2}

    function getTwap(uint256 timestamp) external view returns (uint256);
}

// File: contracts/interfaces/IStableSwap.sol



// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.10 <0.8.0;

import "../interfaces/IFundV3.sol";

interface IStableSwapCore {
    function getQuoteOut(uint256 baseIn) external view returns (uint256 quoteOut);

    function getQuoteIn(uint256 baseOut) external view returns (uint256 quoteIn);

    function getBaseOut(uint256 quoteIn) external view returns (uint256 baseOut);

    function getBaseIn(uint256 quoteOut) external view returns (uint256 baseIn);

    function buy(
        uint256 version,
        uint256 baseOut,
        address recipient,
        bytes calldata data
    ) external returns (uint256 realBaseOut);

    function sell(
        uint256 version,
        uint256 quoteOut,
        address recipient,
        bytes calldata data
    ) external returns (uint256 realQuoteOut);
}

interface IStableSwap is IStableSwapCore {
    function fund() external view returns (IFundV3);

    function baseTranche() external view returns (uint256);

    function baseAddress() external view returns (address);

    function quoteAddress() external view returns (address);

    function allBalances() external view returns (uint256, uint256);

    function getOraclePrice() external view returns (uint256);

    function getCurrentD() external view returns (uint256);

    function getCurrentPriceOverOracle() external view returns (uint256);

    function getCurrentPrice() external view returns (uint256);

    function getPriceOverOracleIntegral() external view returns (uint256);

    function addLiquidity(uint256 version, address recipient) external returns (uint256);

    function removeLiquidity(
        uint256 version,
        uint256 lpIn,
        uint256 minBaseOut,
        uint256 minQuoteOut
    ) external returns (uint256 baseOut, uint256 quoteOut);

    function removeLiquidityUnwrap(
        uint256 version,
        uint256 lpIn,
        uint256 minBaseOut,
        uint256 minQuoteOut
    ) external returns (uint256 baseOut, uint256 quoteOut);

    function removeBaseLiquidity(
        uint256 version,
        uint256 lpIn,
        uint256 minBaseOut
    ) external returns (uint256 baseOut);

    function removeQuoteLiquidity(
        uint256 version,
        uint256 lpIn,
        uint256 minQuoteOut
    ) external returns (uint256 quoteOut);

    function removeQuoteLiquidityUnwrap(
        uint256 version,
        uint256 lpIn,
        uint256 minQuoteOut
    ) external returns (uint256 quoteOut);
}

/// @dev The interface shares the same function names as in `IStableSwapCore`;
///      all getters are defined as non-view functions in order to parse and
///      return the internal revert messages
interface IStableSwapCoreInternalRevertExpected {
    function getQuoteOut(uint256 baseIn) external returns (uint256 quoteOut);

    function getQuoteIn(uint256 baseOut) external returns (uint256 quoteIn);

    function getBaseOut(uint256 quoteIn) external returns (uint256 baseOut);

    function getBaseIn(uint256 quoteOut) external returns (uint256 baseIn);

    function buy(
        uint256 version,
        uint256 baseOut,
        address recipient,
        bytes calldata data
    ) external returns (uint256 realBaseOut);

    function sell(
        uint256 version,
        uint256 quoteOut,
        address recipient,
        bytes calldata data
    ) external returns (uint256 realQuoteOut);
}