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// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;
pragma abicoder v2;

import "contracts/core/libraries/SafeCast.sol";
import "contracts/core/libraries/TickMath.sol";
import "contracts/core/libraries/TickBitmap.sol";
import "contracts/core/interfaces/ICLPool.sol";
import "contracts/core/interfaces/callback/ICLSwapCallback.sol";

import "../interfaces/IQuoterV2.sol";
import "../base/PeripheryImmutableState.sol";
import "../libraries/Path.sol";
import "../libraries/PoolAddress.sol";
import "../libraries/CallbackValidation.sol";
import "../libraries/PoolTicksCounter.sol";

/// @title Provides quotes for swaps
/// @notice Allows getting the expected amount out or amount in for a given swap without executing the swap
/// @dev These functions are not gas efficient and should _not_ be called on chain. Instead, optimistically execute
/// the swap and check the amounts in the callback.
contract QuoterV2 is IQuoterV2, ICLSwapCallback, PeripheryImmutableState {
    using Path for bytes;
    using SafeCast for uint256;
    using PoolTicksCounter for ICLPool;

    /// @dev Transient storage variable used to check a safety condition in exact output swaps.
    uint256 private amountOutCached;

    constructor(address _factory, address _WETH9) PeripheryImmutableState(_factory, _WETH9) {}

    function getPool(address tokenA, address tokenB, int24 tickSpacing) private view returns (ICLPool) {
        return ICLPool(PoolAddress.computeAddress(factory, PoolAddress.getPoolKey(tokenA, tokenB, tickSpacing)));
    }

    /// @inheritdoc ICLSwapCallback
    function uniswapV3SwapCallback(int256 amount0Delta, int256 amount1Delta, bytes memory path)
        external
        view
        override
    {
        require(amount0Delta > 0 || amount1Delta > 0); // swaps entirely within 0-liquidity regions are not supported
        (address tokenIn, address tokenOut, int24 tickSpacing) = path.decodeFirstPool();
        CallbackValidation.verifyCallback(factory, tokenIn, tokenOut, tickSpacing);

        (bool isExactInput, uint256 amountToPay, uint256 amountReceived) = amount0Delta > 0
            ? (tokenIn < tokenOut, uint256(amount0Delta), uint256(-amount1Delta))
            : (tokenOut < tokenIn, uint256(amount1Delta), uint256(-amount0Delta));

        ICLPool pool = getPool(tokenIn, tokenOut, tickSpacing);
        (uint160 sqrtPriceX96After, int24 tickAfter,,,,) = pool.slot0();

        if (isExactInput) {
            assembly {
                let ptr := mload(0x40)
                mstore(ptr, amountReceived)
                mstore(add(ptr, 0x20), sqrtPriceX96After)
                mstore(add(ptr, 0x40), tickAfter)
                revert(ptr, 96)
            }
        } else {
            // if the cache has been populated, ensure that the full output amount has been received
            if (amountOutCached != 0) require(amountReceived == amountOutCached);
            assembly {
                let ptr := mload(0x40)
                mstore(ptr, amountToPay)
                mstore(add(ptr, 0x20), sqrtPriceX96After)
                mstore(add(ptr, 0x40), tickAfter)
                revert(ptr, 96)
            }
        }
    }

    /// @dev Parses a revert reason that should contain the numeric quote
    function parseRevertReason(bytes memory reason)
        private
        pure
        returns (uint256 amount, uint160 sqrtPriceX96After, int24 tickAfter)
    {
        if (reason.length != 96) {
            if (reason.length < 68) revert("Unexpected error");
            assembly {
                reason := add(reason, 0x04)
            }
            revert(abi.decode(reason, (string)));
        }
        return abi.decode(reason, (uint256, uint160, int24));
    }

    function handleRevert(bytes memory reason, ICLPool pool, uint256 gasEstimate)
        private
        view
        returns (uint256 amount, uint160 sqrtPriceX96After, uint32 initializedTicksCrossed, uint256)
    {
        int24 tickBefore;
        int24 tickAfter;
        (, tickBefore,,,,) = pool.slot0();
        (amount, sqrtPriceX96After, tickAfter) = parseRevertReason(reason);

        initializedTicksCrossed = pool.countInitializedTicksCrossed(tickBefore, tickAfter);

        return (amount, sqrtPriceX96After, initializedTicksCrossed, gasEstimate);
    }

    function quoteExactInputSingle(QuoteExactInputSingleParams memory params)
        public
        override
        returns (uint256 amountOut, uint160 sqrtPriceX96After, uint32 initializedTicksCrossed, uint256 gasEstimate)
    {
        bool zeroForOne = params.tokenIn < params.tokenOut;
        ICLPool pool = getPool(params.tokenIn, params.tokenOut, params.tickSpacing);

        uint256 gasBefore = gasleft();
        try pool.swap(
            address(this), // address(0) might cause issues with some tokens
            zeroForOne,
            params.amountIn.toInt256(),
            params.sqrtPriceLimitX96 == 0
                ? (zeroForOne ? TickMath.MIN_SQRT_RATIO + 1 : TickMath.MAX_SQRT_RATIO - 1)
                : params.sqrtPriceLimitX96,
            abi.encodePacked(params.tokenIn, params.tickSpacing, params.tokenOut)
        ) {} catch (bytes memory reason) {
            gasEstimate = gasBefore - gasleft();
            return handleRevert(reason, pool, gasEstimate);
        }
    }

    function quoteExactInput(bytes memory path, uint256 amountIn)
        public
        override
        returns (
            uint256 amountOut,
            uint160[] memory sqrtPriceX96AfterList,
            uint32[] memory initializedTicksCrossedList,
            uint256 gasEstimate
        )
    {
        sqrtPriceX96AfterList = new uint160[](path.numPools());
        initializedTicksCrossedList = new uint32[](path.numPools());

        uint256 i = 0;
        while (true) {
            (address tokenIn, address tokenOut, int24 tickSpacing) = path.decodeFirstPool();

            // the outputs of prior swaps become the inputs to subsequent ones
            (uint256 _amountOut, uint160 _sqrtPriceX96After, uint32 _initializedTicksCrossed, uint256 _gasEstimate) =
            quoteExactInputSingle(
                QuoteExactInputSingleParams({
                    tokenIn: tokenIn,
                    tokenOut: tokenOut,
                    tickSpacing: tickSpacing,
                    amountIn: amountIn,
                    sqrtPriceLimitX96: 0
                })
            );

            sqrtPriceX96AfterList[i] = _sqrtPriceX96After;
            initializedTicksCrossedList[i] = _initializedTicksCrossed;
            amountIn = _amountOut;
            gasEstimate += _gasEstimate;
            i++;

            // decide whether to continue or terminate
            if (path.hasMultiplePools()) {
                path = path.skipToken();
            } else {
                return (amountIn, sqrtPriceX96AfterList, initializedTicksCrossedList, gasEstimate);
            }
        }
    }

    function quoteExactOutputSingle(QuoteExactOutputSingleParams memory params)
        public
        override
        returns (uint256 amountIn, uint160 sqrtPriceX96After, uint32 initializedTicksCrossed, uint256 gasEstimate)
    {
        bool zeroForOne = params.tokenIn < params.tokenOut;
        ICLPool pool = getPool(params.tokenIn, params.tokenOut, params.tickSpacing);

        // if no price limit has been specified, cache the output amount for comparison in the swap callback
        if (params.sqrtPriceLimitX96 == 0) amountOutCached = params.amount;
        uint256 gasBefore = gasleft();
        try pool.swap(
            address(this), // address(0) might cause issues with some tokens
            zeroForOne,
            -params.amount.toInt256(),
            params.sqrtPriceLimitX96 == 0
                ? (zeroForOne ? TickMath.MIN_SQRT_RATIO + 1 : TickMath.MAX_SQRT_RATIO - 1)
                : params.sqrtPriceLimitX96,
            abi.encodePacked(params.tokenOut, params.tickSpacing, params.tokenIn)
        ) {} catch (bytes memory reason) {
            gasEstimate = gasBefore - gasleft();
            if (params.sqrtPriceLimitX96 == 0) delete amountOutCached; // clear cache
            return handleRevert(reason, pool, gasEstimate);
        }
    }

    function quoteExactOutput(bytes memory path, uint256 amountOut)
        public
        override
        returns (
            uint256 amountIn,
            uint160[] memory sqrtPriceX96AfterList,
            uint32[] memory initializedTicksCrossedList,
            uint256 gasEstimate
        )
    {
        sqrtPriceX96AfterList = new uint160[](path.numPools());
        initializedTicksCrossedList = new uint32[](path.numPools());

        uint256 i = 0;
        while (true) {
            (address tokenOut, address tokenIn, int24 tickSpacing) = path.decodeFirstPool();

            // the inputs of prior swaps become the outputs of subsequent ones
            (uint256 _amountIn, uint160 _sqrtPriceX96After, uint32 _initializedTicksCrossed, uint256 _gasEstimate) =
            quoteExactOutputSingle(
                QuoteExactOutputSingleParams({
                    tokenIn: tokenIn,
                    tokenOut: tokenOut,
                    amount: amountOut,
                    tickSpacing: tickSpacing,
                    sqrtPriceLimitX96: 0
                })
            );

            sqrtPriceX96AfterList[i] = _sqrtPriceX96After;
            initializedTicksCrossedList[i] = _initializedTicksCrossed;
            amountOut = _amountIn;
            gasEstimate += _gasEstimate;
            i++;

            // decide whether to continue or terminate
            if (path.hasMultiplePools()) {
                path = path.skipToken();
            } else {
                return (amountOut, sqrtPriceX96AfterList, initializedTicksCrossedList, gasEstimate);
            }
        }
    }
}

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

/// @title Callback for ICLPoolActions#swap
/// @notice Any contract that calls ICLPoolActions#swap must implement this interface
interface ICLSwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via ICLPool#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 CLPool deployed by the canonical CLFactory.
    /// 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 ICLPoolActions#swap call
    function uniswapV3SwapCallback(int256 amount0Delta, int256 amount1Delta, bytes calldata data) external;
}

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

import {IVoter} from "contracts/core/interfaces/IVoter.sol";
import {IFactoryRegistry} from "contracts/core/interfaces/IFactoryRegistry.sol";

/// @title The interface for the CL Factory
/// @notice The CL Factory facilitates creation of CL pools and control over the protocol fees
interface ICLFactory {
    /// @notice Emitted when the owner of the factory is changed
    /// @param oldOwner The owner before the owner was changed
    /// @param newOwner The owner after the owner was changed
    event OwnerChanged(address indexed oldOwner, address indexed newOwner);

    event VoterChanged(address indexed oldVoter, address indexed newVoter);

    /// @notice Emitted when the swapFeeManager of the factory is changed
    /// @param oldFeeManager The swapFeeManager before the swapFeeManager was changed
    /// @param newFeeManager The swapFeeManager after the swapFeeManager was changed
    event SwapFeeManagerChanged(address indexed oldFeeManager, address indexed newFeeManager);

    /// @notice Emitted when the swapFeeModule of the factory is changed
    /// @param oldFeeModule The swapFeeModule before the swapFeeModule was changed
    /// @param newFeeModule The swapFeeModule after the swapFeeModule was changed
    event SwapFeeModuleChanged(address indexed oldFeeModule, address indexed newFeeModule);

    /// @notice Emitted when the unstakedFeeManager of the factory is changed
    /// @param oldFeeManager The unstakedFeeManager before the unstakedFeeManager was changed
    /// @param newFeeManager The unstakedFeeManager after the unstakedFeeManager was changed
    event UnstakedFeeManagerChanged(address indexed oldFeeManager, address indexed newFeeManager);

    /// @notice Emitted when the unstakedFeeModule of the factory is changed
    /// @param oldFeeModule The unstakedFeeModule before the unstakedFeeModule was changed
    /// @param newFeeModule The unstakedFeeModule after the unstakedFeeModule was changed
    event UnstakedFeeModuleChanged(address indexed oldFeeModule, address indexed newFeeModule);

    /// @notice Emitted when the defaultUnstakedFee of the factory is changed
    /// @param oldUnstakedFee The defaultUnstakedFee before the defaultUnstakedFee was changed
    /// @param newUnstakedFee The defaultUnstakedFee after the unstakedFeeModule was changed
    event DefaultUnstakedFeeChanged(uint24 indexed oldUnstakedFee, uint24 indexed newUnstakedFee);

    /// @notice Emitted when a pool is created
    /// @param token0 The first token of the pool by address sort order
    /// @param token1 The second token of the pool by address sort order
    /// @param tickSpacing The minimum number of ticks between initialized ticks
    /// @param pool The address of the created pool
    event PoolCreated(address indexed token0, address indexed token1, int24 indexed tickSpacing, address pool);

    /// @notice Emitted when a new tick spacing is enabled for pool creation via the factory
    /// @param tickSpacing The minimum number of ticks between initialized ticks for pools
    /// @param fee The default fee for a pool created with a given tickSpacing
    event TickSpacingEnabled(int24 indexed tickSpacing, uint24 indexed fee);

    /// @notice The voter contract, used to create gauges
    /// @return The address of the voter contract
    function voter() external view returns (IVoter);

    /// @notice The address of the pool implementation contract used to deploy proxies / clones
    /// @return The address of the pool implementation contract
    function poolImplementation() external view returns (address);

    /// @notice Factory registry for valid pool / gauge / rewards factories
    /// @return The address of the factory registry
    function factoryRegistry() external view returns (IFactoryRegistry);

    /// @notice Returns the current owner of the factory
    /// @dev Can be changed by the current owner via setOwner
    /// @return The address of the factory owner
    function owner() external view returns (address);

    /// @notice Returns the current swapFeeManager of the factory
    /// @dev Can be changed by the current swap fee manager via setSwapFeeManager
    /// @return The address of the factory swapFeeManager
    function swapFeeManager() external view returns (address);

    /// @notice Returns the current swapFeeModule of the factory
    /// @dev Can be changed by the current swap fee manager via setSwapFeeModule
    /// @return The address of the factory swapFeeModule
    function swapFeeModule() external view returns (address);

    /// @notice Returns the current unstakedFeeManager of the factory
    /// @dev Can be changed by the current unstaked fee manager via setUnstakedFeeManager
    /// @return The address of the factory unstakedFeeManager
    function unstakedFeeManager() external view returns (address);

    /// @notice Returns the current unstakedFeeModule of the factory
    /// @dev Can be changed by the current unstaked fee manager via setUnstakedFeeModule
    /// @return The address of the factory unstakedFeeModule
    function unstakedFeeModule() external view returns (address);

    /// @notice Returns the current defaultUnstakedFee of the factory
    /// @dev Can be changed by the current unstaked fee manager via setDefaultUnstakedFee
    /// @return The default Unstaked Fee of the factory
    function defaultUnstakedFee() external view returns (uint24);

    /// @notice Returns a default fee for a tick spacing.
    /// @dev Use getFee for the most up to date fee for a given pool.
    /// A tick spacing can never be removed, so this value should be hard coded or cached in the calling context
    /// @param tickSpacing The enabled tick spacing. Returns 0 if not enabled
    /// @return fee The default fee for the given tick spacing
    function tickSpacingToFee(int24 tickSpacing) external view returns (uint24 fee);

    /// @notice Returns a list of enabled tick spacings. Used to iterate through pools created by the factory
    /// @dev Tick spacings cannot be removed. Tick spacings are not ordered
    /// @return List of enabled tick spacings
    function tickSpacings() external view returns (int24[] memory);

    /// @notice Returns the pool address for a given pair of tokens and a tick spacing, or address 0 if it does not exist
    /// @dev tokenA and tokenB may be passed in either token0/token1 or token1/token0 order
    /// @param tokenA The contract address of either token0 or token1
    /// @param tokenB The contract address of the other token
    /// @param tickSpacing The tick spacing of the pool
    /// @return pool The pool address
    function getPool(address tokenA, address tokenB, int24 tickSpacing) external view returns (address pool);

    /// @notice Return address of pool created by this factory given its `index`
    /// @param index Index of the pool
    /// @return The pool address in the given index
    function allPools(uint256 index) external view returns (address);

    /// @notice Returns the number of pools created from this factory
    /// @return Number of pools created from this factory
    function allPoolsLength() external view returns (uint256);

    /// @notice Used in VotingEscrow to determine if a contract is a valid pool of the factory
    /// @param pool The address of the pool to check
    /// @return Whether the pool is a valid pool of the factory
    function isPair(address pool) external view returns (bool);

    /// @notice Get swap & flash fee for a given pool. Accounts for default and dynamic fees
    /// @dev Swap & flash fee is denominated in pips. i.e. 1e-6
    /// @param pool The pool to get the swap & flash fee for
    /// @return The swap & flash fee for the given pool
    function getSwapFee(address pool) external view returns (uint24);

    /// @notice Get unstaked fee for a given pool. Accounts for default and dynamic fees
    /// @dev Unstaked fee is denominated in pips. i.e. 1e-6
    /// @param pool The pool to get the unstaked fee for
    /// @return The unstaked fee for the given pool
    function getUnstakedFee(address pool) external view returns (uint24);

    /// @notice Creates a pool for the given two tokens and fee
    /// @param tokenA One of the two tokens in the desired pool
    /// @param tokenB The other of the two tokens in the desired pool
    /// @param tickSpacing The desired tick spacing for the pool
    /// @param sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96
    /// @dev tokenA and tokenB may be passed in either order: token0/token1 or token1/token0. The call will
    /// revert if the pool already exists, the tick spacing is invalid, or the token arguments are invalid
    /// @return pool The address of the newly created pool
    function createPool(address tokenA, address tokenB, int24 tickSpacing, uint160 sqrtPriceX96)
        external
        returns (address pool);

    /// @notice Updates the owner of the factory
    /// @dev Must be called by the current owner
    /// @param _owner The new owner of the factory
    function setOwner(address _owner) external;

    /// @notice Updates the swapFeeManager of the factory
    /// @dev Must be called by the current swap fee manager
    /// @param _swapFeeManager The new swapFeeManager of the factory
    function setSwapFeeManager(address _swapFeeManager) external;

    /// @notice Updates the swapFeeModule of the factory
    /// @dev Must be called by the current swap fee manager
    /// @param _swapFeeModule The new swapFeeModule of the factory
    function setSwapFeeModule(address _swapFeeModule) external;

    /// @notice Updates the unstakedFeeManager of the factory
    /// @dev Must be called by the current unstaked fee manager
    /// @param _unstakedFeeManager The new unstakedFeeManager of the factory
    function setUnstakedFeeManager(address _unstakedFeeManager) external;

    /// @notice Updates the unstakedFeeModule of the factory
    /// @dev Must be called by the current unstaked fee manager
    /// @param _unstakedFeeModule The new unstakedFeeModule of the factory
    function setUnstakedFeeModule(address _unstakedFeeModule) external;

    /// @notice Updates the defaultUnstakedFee of the factory
    /// @dev Must be called by the current unstaked fee manager
    /// @param _defaultUnstakedFee The new defaultUnstakedFee of the factory
    function setDefaultUnstakedFee(uint24 _defaultUnstakedFee) external;

    /// @notice Enables a certain tickSpacing
    /// @dev Tick spacings may never be removed once enabled
    /// @param tickSpacing The spacing between ticks to be enforced in the pool
    /// @param fee The default fee associated with a given tick spacing
    function enableTickSpacing(int24 tickSpacing, uint24 fee) external;
}

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

import "./pool/ICLPoolConstants.sol";
import "./pool/ICLPoolState.sol";
import "./pool/ICLPoolDerivedState.sol";
import "./pool/ICLPoolActions.sol";
import "./pool/ICLPoolOwnerActions.sol";
import "./pool/ICLPoolEvents.sol";

/// @title The interface for a CL Pool
/// @notice A CL 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 ICLPool is
    ICLPoolConstants,
    ICLPoolState,
    ICLPoolDerivedState,
    ICLPoolActions,
    ICLPoolEvents,
    ICLPoolOwnerActions
{}

// SPDX-License-Identifier: MIT
pragma solidity =0.7.6;

interface IFactoryRegistry {
    function approve(address poolFactory, address votingRewardsFactory, address gaugeFactory) external;

    function isPoolFactoryApproved(address poolFactory) external returns (bool);

    function factoriesToPoolFactory(address poolFactory)
        external
        returns (address votingRewardsFactory, address gaugeFactory);
}

// SPDX-License-Identifier: MIT
pragma solidity =0.7.6;
pragma abicoder v2;

import {IVotingEscrow} from "contracts/core/interfaces/IVotingEscrow.sol";
import {IFactoryRegistry} from "contracts/core/interfaces/IFactoryRegistry.sol";

interface IVoter {
    function ve() external view returns (IVotingEscrow);

    function vote(uint256 _tokenId, address[] calldata _poolVote, uint256[] calldata _weights) external;

    function gauges(address _pool) external view returns (address);

    function gaugeToFees(address _gauge) external view returns (address);

    function gaugeToBribes(address _gauge) external view returns (address);

    function createGauge(address _poolFactory, address _pool) external returns (address);

    function distribute(address gauge) external;

    function factoryRegistry() external view returns (IFactoryRegistry);

    /// @dev Utility to distribute to gauges of pools in array.
    /// @param _gauges Array of gauges to distribute to.
    function distribute(address[] memory _gauges) external;

    function isAlive(address _gauge) external view returns (bool);

    function killGauge(address _gauge) external;

    function emergencyCouncil() external view returns (address);

    /// @notice Claim emissions from gauges.
    /// @param _gauges Array of gauges to collect emissions from.
    function claimRewards(address[] memory _gauges) external;

    /// @notice Claim fees for a given NFT.
    /// @dev Utility to help batch fee claims.
    /// @param _fees    Array of FeesVotingReward contracts to collect from.
    /// @param _tokens  Array of tokens that are used as fees.
    /// @param _tokenId Id of veNFT that you wish to claim fees for.
    function claimFees(address[] memory _fees, address[][] memory _tokens, uint256 _tokenId) external;
}

// SPDX-License-Identifier: MIT
pragma solidity =0.7.6;

interface IVotingEscrow {
    function team() external returns (address);

    /// @notice Deposit `_value` tokens for `msg.sender` and lock for `_lockDuration`
    /// @param _value Amount to deposit
    /// @param _lockDuration Number of seconds to lock tokens for (rounded down to nearest week)
    /// @return TokenId of created veNFT
    function createLock(uint256 _value, uint256 _lockDuration) external returns (uint256);
}

// 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 ICLPoolActions {
    /// @notice Initialize function used in proxy deployment
    /// @dev Can be called once only
    /// Price is represented as a sqrt(amountToken1/amountToken0) Q64.96 value
    /// @dev not locked because it initializes unlocked
    /// @param _factory The CL factory contract address
    /// @param _token0 The first token of the pool by address sort order
    /// @param _token1 The second token of the pool by address sort order
    /// @param _tickSpacing The pool tick spacing
    /// @param _sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96
    function initialize(
        address _factory,
        address _token0,
        address _token1,
        int24 _tickSpacing,
        uint160 _sqrtPriceX96
    ) external;

    /// @notice Initialize gauge and nft manager
    /// @dev Callable only once, by the gauge factory
    /// @param _gauge The gauge corresponding to this pool
    /// @param _nft The position manager used for position management
    function setGaugeAndPositionManager(address _gauge, address _nft) external;

    /// @notice Adds liquidity for the given recipient/tickLower/tickUpper position
    /// @dev The caller of this method receives a callback in the form of ICLMintCallback#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 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
    /// @param owner Owner of the position in the pool (nft manager or gauge)
    /// @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,
        address owner
    ) 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 Burn liquidity from the supplied owner 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
    /// @param owner Owner of the position in the pool (nft manager or gauge)
    /// @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, address owner)
        external
        returns (uint256 amount0, uint256 amount1);

    /// @notice Convert existing liquidity into staked liquidity
    /// @notice Only callable by the gauge associated with this pool
    /// @param stakedLiquidityDelta The amount by which to increase or decrease the staked liquidity
    /// @param tickLower The lower tick of the position for which to stake liquidity
    /// @param tickUpper The upper tick of the position for which to stake liquidity
    /// @param positionUpdate If the nft and gauge position should be updated
    function stake(int128 stakedLiquidityDelta, int24 tickLower, int24 tickUpper, bool positionUpdate) external;

    /// @notice Swap token0 for token1, or token1 for token0
    /// @dev The caller of this method receives a callback in the form of ICLSwapCallback#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 ICLFlashCallback#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;

    /// @notice Updates rewardGrowthGlobalX128 every time when any tick is crossed,
    /// or when any position is staked/unstaked from the gauge
    function updateRewardsGrowthGlobal() external;

    /// @notice Syncs rewards with gauge
    /// @param rewardRate the rate rewards being distributed during the epoch
    /// @param rewardReserve the available rewards to be distributed during the epoch
    /// @param periodFinish the end of the current period of rewards, updated once per epoch
    function syncReward(uint256 rewardRate, uint256 rewardReserve, uint256 periodFinish) external;
}

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

/// @title Pool state that never changes
/// @notice These parameters are not defined as immutable (due to proxy pattern) but are effectively immutable.
/// @notice i.e., the methods will always return the same values
interface ICLPoolConstants {
    /// @notice The contract that deployed the pool, which must adhere to the ICLFactory 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 gauge corresponding to this pool
    /// @return The gauge contract address
    function gauge() external view returns (address);

    /// @notice The nft manager
    /// @return The nft manager contract address
    function nft() external view returns (address);

//    /// @notice The factory registry that manages pool <> gauge <> reward factory relationships
//    /// @return The factory registry contract address
//    function factoryRegistry() external view returns (address);

    /// @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);
}

// 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 ICLPoolDerivedState {
    /// @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);
}

// 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 ICLPoolEvents {
    /// @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 gauge
    /// @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 CollectFees(address indexed recipient, uint128 amount0, uint128 amount1);
}

// 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 ICLPoolOwnerActions {
    /// @notice Collect the gauge fee accrued to the pool
    /// @return amount0 The gauge fee collected in token0
    /// @return amount1 The gauge fee collected in token1
    function collectFees() external returns (uint128 amount0, uint128 amount1);
}

// 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 ICLPoolState {
    /// @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.
    /// unlocked Whether the pool is currently locked to reentrancy
    function slot0()
        external
        view
        returns (
            uint160 sqrtPriceX96,
            int24 tick,
            uint16 observationIndex,
            uint16 observationCardinality,
            uint16 observationCardinalityNext,
            bool unlocked
        );

    /// @notice The pool's swap & flash fee in pips, i.e. 1e-6
    /// @dev Can be modified in PoolFactory on a pool basis or upgraded to be dynamic.
    /// @return The swap & flash fee
    function fee() external view returns (uint24);

    /// @notice The pool's unstaked fee in pips, i.e. 1e-6
    /// @dev Can be modified in PoolFactory on a pool basis or upgraded to be dynamic.
    /// @return The unstaked fee
    function unstakedFee() external view returns (uint24);

    /// @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 reward growth as a Q128.128 rewards of emission collected per unit of liquidity for the entire life of the pool
    /// @dev This value can overflow the uint256
    function rewardGrowthGlobalX128() external view returns (uint256);

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

    /// @notice the emission rate of time-based farming
    function rewardRate() external view returns (uint256);

    /// @notice acts as a virtual reserve that holds information on how many rewards are yet to be distributed
    function rewardReserve() external view returns (uint256);

    /// @notice timestamp of the end of the current epoch's rewards
    function periodFinish() external view returns (uint256);

    /// @notice last time the rewardReserve and rewardRate were updated
    function lastUpdated() external view returns (uint32);

    /// @notice tracks total rewards distributed when no staked liquidity in active tick for epoch ending at periodFinish
    /// @notice this amount is rolled over on the next call to notifyRewardAmount
    /// @dev rollover will always be smaller than the rewards distributed that epoch
    function rollover() external view returns (uint256);

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

    /// @notice The currently in range staked liquidity available to the pool
    /// @dev This value has no relationship to the total staked liquidity across all ticks
    function stakedLiquidity() 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,
    /// stakedLiquidityNet how much staked 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,
    /// rewardGrowthOutsideX128 the reward growth on the other side of the tick from the current tick in emission token
    /// 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,
            int128 stakedLiquidityNet,
            uint256 feeGrowthOutside0X128,
            uint256 feeGrowthOutside1X128,
            uint256 rewardGrowthOutsideX128,
            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
        );

    /// @notice Returns data about reward growth within a tick range.
    /// RewardGrowthGlobalX128 can be supplied as a parameter for claimable reward calculations.
    /// @dev Used in gauge reward/earned calculations
    /// @param tickLower The lower tick of the range
    /// @param tickUpper The upper tick of the range
    /// @param _rewardGrowthGlobalX128 a calculated rewardGrowthGlobalX128 or 0 (in case of 0 it means we use the rewardGrowthGlobalX128 from state)
    /// @return rewardGrowthInsideX128 The reward growth in the range
    function getRewardGrowthInside(int24 tickLower, int24 tickUpper, uint256 _rewardGrowthGlobalX128)
        external
        view
        returns (uint256 rewardGrowthInsideX128);
}

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

/// @title BitMath
/// @dev This library provides functionality for computing bit properties of an unsigned integer
library BitMath {
    /// @notice Returns the index of the most significant bit of the number,
    ///     where the least significant bit is at index 0 and the most significant bit is at index 255
    /// @dev The function satisfies the property:
    ///     x >= 2**mostSignificantBit(x) and x < 2**(mostSignificantBit(x)+1)
    /// @param x the value for which to compute the most significant bit, must be greater than 0
    /// @return r the index of the most significant bit
    function mostSignificantBit(uint256 x) internal pure returns (uint8 r) {
        require(x > 0);

        if (x >= 0x100000000000000000000000000000000) {
            x >>= 128;
            r += 128;
        }
        if (x >= 0x10000000000000000) {
            x >>= 64;
            r += 64;
        }
        if (x >= 0x100000000) {
            x >>= 32;
            r += 32;
        }
        if (x >= 0x10000) {
            x >>= 16;
            r += 16;
        }
        if (x >= 0x100) {
            x >>= 8;
            r += 8;
        }
        if (x >= 0x10) {
            x >>= 4;
            r += 4;
        }
        if (x >= 0x4) {
            x >>= 2;
            r += 2;
        }
        if (x >= 0x2) r += 1;
    }

    /// @notice Returns the index of the least significant bit of the number,
    ///     where the least significant bit is at index 0 and the most significant bit is at index 255
    /// @dev The function satisfies the property:
    ///     (x & 2**leastSignificantBit(x)) != 0 and (x & (2**(leastSignificantBit(x)) - 1)) == 0)
    /// @param x the value for which to compute the least significant bit, must be greater than 0
    /// @return r the index of the least significant bit
    function leastSignificantBit(uint256 x) internal pure returns (uint8 r) {
        require(x > 0);

        r = 255;
        if (x & type(uint128).max > 0) {
            r -= 128;
        } else {
            x >>= 128;
        }
        if (x & type(uint64).max > 0) {
            r -= 64;
        } else {
            x >>= 64;
        }
        if (x & type(uint32).max > 0) {
            r -= 32;
        } else {
            x >>= 32;
        }
        if (x & type(uint16).max > 0) {
            r -= 16;
        } else {
            x >>= 16;
        }
        if (x & type(uint8).max > 0) {
            r -= 8;
        } else {
            x >>= 8;
        }
        if (x & 0xf > 0) {
            r -= 4;
        } else {
            x >>= 4;
        }
        if (x & 0x3 > 0) {
            r -= 2;
        } else {
            x >>= 2;
        }
        if (x & 0x1 > 0) r -= 1;
    }
}

// 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);
    }
}

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

import "./BitMath.sol";

/// @title Packed tick initialized state library
/// @notice Stores a packed mapping of tick index to its initialized state
/// @dev The mapping uses int16 for keys since ticks are represented as int24 and there are 256 (2^8) values per word.
library TickBitmap {
    /// @notice Computes the position in the mapping where the initialized bit for a tick lives
    /// @param tick The tick for which to compute the position
    /// @return wordPos The key in the mapping containing the word in which the bit is stored
    /// @return bitPos The bit position in the word where the flag is stored
    function position(int24 tick) private pure returns (int16 wordPos, uint8 bitPos) {
        wordPos = int16(tick >> 8);
        bitPos = uint8(tick % 256);
    }

    /// @notice Flips the initialized state for a given tick from false to true, or vice versa
    /// @param self The mapping in which to flip the tick
    /// @param tick The tick to flip
    /// @param tickSpacing The spacing between usable ticks
    function flipTick(mapping(int16 => uint256) storage self, int24 tick, int24 tickSpacing) internal {
        require(tick % tickSpacing == 0); // ensure that the tick is spaced
        (int16 wordPos, uint8 bitPos) = position(tick / tickSpacing);
        uint256 mask = 1 << bitPos;
        self[wordPos] ^= mask;
    }

    /// @notice Returns the next initialized tick contained in the same word (or adjacent word) as the tick that is either
    /// to the left (less than or equal to) or right (greater than) of the given tick
    /// @param self The mapping in which to compute the next initialized tick
    /// @param tick The starting tick
    /// @param tickSpacing The spacing between usable ticks
    /// @param lte Whether to search for the next initialized tick to the left (less than or equal to the starting tick)
    /// @return next The next initialized or uninitialized tick up to 256 ticks away from the current tick
    /// @return initialized Whether the next tick is initialized, as the function only searches within up to 256 ticks
    function nextInitializedTickWithinOneWord(
        mapping(int16 => uint256) storage self,
        int24 tick,
        int24 tickSpacing,
        bool lte
    ) internal view returns (int24 next, bool initialized) {
        int24 compressed = tick / tickSpacing;
        if (tick < 0 && tick % tickSpacing != 0) compressed--; // round towards negative infinity

        if (lte) {
            (int16 wordPos, uint8 bitPos) = position(compressed);
            // all the 1s at or to the right of the current bitPos
            uint256 mask = (1 << bitPos) - 1 + (1 << bitPos);
            uint256 masked = self[wordPos] & mask;

            // if there are no initialized ticks to the right of or at the current tick, return rightmost in the word
            initialized = masked != 0;
            // overflow/underflow is possible, but prevented externally by limiting both tickSpacing and tick
            next = initialized
                ? (compressed - int24(bitPos - BitMath.mostSignificantBit(masked))) * tickSpacing
                : (compressed - int24(bitPos)) * tickSpacing;
        } else {
            // start from the word of the next tick, since the current tick state doesn't matter
            (int16 wordPos, uint8 bitPos) = position(compressed + 1);
            // all the 1s at or to the left of the bitPos
            uint256 mask = ~((1 << bitPos) - 1);
            uint256 masked = self[wordPos] & mask;

            // if there are no initialized ticks to the left of the current tick, return leftmost in the word
            initialized = masked != 0;
            // overflow/underflow is possible, but prevented externally by limiting both tickSpacing and tick
            next = initialized
                ? (compressed + 1 + int24(BitMath.leastSignificantBit(masked) - bitPos)) * tickSpacing
                : (compressed + 1 + int24(type(uint8).max - bitPos)) * tickSpacing;
        }
    }
}

// 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;
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;

import "../interfaces/IPeripheryImmutableState.sol";

/// @title Immutable state
/// @notice Immutable state used by periphery contracts
abstract contract PeripheryImmutableState is IPeripheryImmutableState {
    /// @inheritdoc IPeripheryImmutableState
    address public immutable override factory;
    /// @inheritdoc IPeripheryImmutableState
    address public immutable override WETH9;

    constructor(address _factory, address _WETH9) {
        factory = _factory;
        WETH9 = _WETH9;
    }
}

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

/// @title Immutable state
/// @notice Functions that return immutable state of the router
interface IPeripheryImmutableState {
    /// @return Returns the address of the CL factory
    function factory() external view returns (address);

    /// @return Returns the address of WETH9
    function WETH9() external view returns (address);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;

/// @title QuoterV2 Interface
/// @notice Supports quoting the calculated amounts from exact input or exact output swaps.
/// @notice For each pool also tells you the number of initialized ticks crossed and the sqrt price of the pool after the swap.
/// @dev These functions are not marked view because they rely on calling non-view functions and reverting
/// to compute the result. They are also not gas efficient and should not be called on-chain.
interface IQuoterV2 {
    /// @notice Returns the amount out received for a given exact input swap without executing the swap
    /// @param path The path of the swap, i.e. each token pair and the pool tick spacing
    /// @param amountIn The amount of the first token to swap
    /// @return amountOut The amount of the last token that would be received
    /// @return sqrtPriceX96AfterList List of the sqrt price after the swap for each pool in the path
    /// @return initializedTicksCrossedList List of the initialized ticks that the swap crossed for each pool in the path
    /// @return gasEstimate The estimate of the gas that the swap consumes
    function quoteExactInput(bytes memory path, uint256 amountIn)
        external
        returns (
            uint256 amountOut,
            uint160[] memory sqrtPriceX96AfterList,
            uint32[] memory initializedTicksCrossedList,
            uint256 gasEstimate
        );

    struct QuoteExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint256 amountIn;
        int24 tickSpacing;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Returns the amount out received for a given exact input but for a swap of a single pool
    /// @param params The params for the quote, encoded as `QuoteExactInputSingleParams`
    /// tokenIn The token being swapped in
    /// tokenOut The token being swapped out
    /// tickSpacing The tick spacing of the token pool to consider for the pair
    /// amountIn The desired input amount
    /// sqrtPriceLimitX96 The price limit of the pool that cannot be exceeded by the swap
    /// @return amountOut The amount of `tokenOut` that would be received
    /// @return sqrtPriceX96After The sqrt price of the pool after the swap
    /// @return initializedTicksCrossed The number of initialized ticks that the swap crossed
    /// @return gasEstimate The estimate of the gas that the swap consumes
    function quoteExactInputSingle(QuoteExactInputSingleParams memory params)
        external
        returns (uint256 amountOut, uint160 sqrtPriceX96After, uint32 initializedTicksCrossed, uint256 gasEstimate);

    /// @notice Returns the amount in required for a given exact output swap without executing the swap
    /// @param path The path of the swap, i.e. each token pair and the pool tick spacing. Path must be provided in reverse order
    /// @param amountOut The amount of the last token to receive
    /// @return amountIn The amount of first token required to be paid
    /// @return sqrtPriceX96AfterList List of the sqrt price after the swap for each pool in the path
    /// @return initializedTicksCrossedList List of the initialized ticks that the swap crossed for each pool in the path
    /// @return gasEstimate The estimate of the gas that the swap consumes
    function quoteExactOutput(bytes memory path, uint256 amountOut)
        external
        returns (
            uint256 amountIn,
            uint160[] memory sqrtPriceX96AfterList,
            uint32[] memory initializedTicksCrossedList,
            uint256 gasEstimate
        );

    struct QuoteExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint256 amount;
        int24 tickSpacing;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Returns the amount in required to receive the given exact output amount but for a swap of a single pool
    /// @param params The params for the quote, encoded as `QuoteExactOutputSingleParams`
    /// tokenIn The token being swapped in
    /// tokenOut The token being swapped out
    /// tickSpacing The tick spacing of the token pool to consider for the pair
    /// amountOut The desired output amount
    /// sqrtPriceLimitX96 The price limit of the pool that cannot be exceeded by the swap
    /// @return amountIn The amount required as the input for the swap in order to receive `amountOut`
    /// @return sqrtPriceX96After The sqrt price of the pool after the swap
    /// @return initializedTicksCrossed The number of initialized ticks that the swap crossed
    /// @return gasEstimate The estimate of the gas that the swap consumes
    function quoteExactOutputSingle(QuoteExactOutputSingleParams memory params)
        external
        returns (uint256 amountIn, uint160 sqrtPriceX96After, uint32 initializedTicksCrossed, uint256 gasEstimate);
}

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * @title Solidity Bytes Arrays Utils
 * @author Gonçalo Sá <[email protected]>
 *
 * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity.
 *      The library lets you concatenate, slice and type cast bytes arrays both in memory and storage.
 */
pragma solidity >=0.5.0 <0.8.0;

library BytesLib {
    function slice(bytes memory _bytes, uint256 _start, uint256 _length) internal pure returns (bytes memory) {
        require(_length + 31 >= _length, "SO"); // slice overflow
        require(_start + _length >= _start, "SO"); // slice overflow
        require(_bytes.length >= _start + _length, "SOB"); // slice out of bounds

        bytes memory tempBytes;

        assembly {
            switch iszero(_length)
            case 0 {
                // Get a location of some free memory and store it in tempBytes as
                // Solidity does for memory variables.
                tempBytes := mload(0x40)

                // The first word of the slice result is potentially a partial
                // word read from the original array. To read it, we calculate
                // the length of that partial word and start copying that many
                // bytes into the array. The first word we copy will start with
                // data we don't care about, but the last `lengthmod` bytes will
                // land at the beginning of the contents of the new array. When
                // we're done copying, we overwrite the full first word with
                // the actual length of the slice.
                let lengthmod := and(_length, 31)

                // The multiplication in the next line is necessary
                // because when slicing multiples of 32 bytes (lengthmod == 0)
                // the following copy loop was copying the origin's length
                // and then ending prematurely not copying everything it should.
                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
                let end := add(mc, _length)

                for {
                    // The multiplication in the next line has the same exact purpose
                    // as the one above.
                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
                } lt(mc, end) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } { mstore(mc, mload(cc)) }

                mstore(tempBytes, _length)

                //update free-memory pointer
                //allocating the array padded to 32 bytes like the compiler does now
                mstore(0x40, and(add(mc, 31), not(31)))
            }
            //if we want a zero-length slice let's just return a zero-length array
            default {
                tempBytes := mload(0x40)
                //zero out the 32 bytes slice we are about to return
                //we need to do it because Solidity does not garbage collect
                mstore(tempBytes, 0)

                mstore(0x40, add(tempBytes, 0x20))
            }
        }

        return tempBytes;
    }

    function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) {
        require(_start + 20 >= _start, "AO"); // to address overflow
        require(_bytes.length >= _start + 20, "AOB"); // to address out of bounds
        address tempAddress;

        assembly {
            tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)
        }

        return tempAddress;
    }

    function toInt24(bytes memory _bytes, uint256 _start) internal pure returns (int24) {
        require(_start + 3 >= _start, "UO"); // uint24 overflow
        require(_bytes.length >= _start + 3, "UOB"); // uint24 out of bounds
        uint24 tempUint;

        assembly {
            tempUint := mload(add(add(_bytes, 0x3), _start))
        }

        require(tempUint <= uint24(type(int24).max), "IO"); // int24 overflow
        return int24(tempUint);
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;

import "contracts/core/interfaces/ICLPool.sol";
import "./PoolAddress.sol";

/// @notice Provides validation for callbacks from CL Pools
library CallbackValidation {
    /// @notice Returns the address of a valid CL Pool
    /// @param factory The contract address of the CL factory
    /// @param tokenA The contract address of either token0 or token1
    /// @param tokenB The contract address of the other token
    /// @param tickSpacing The tick spacing for the pool
    /// @return pool The V3 pool contract address
    function verifyCallback(address factory, address tokenA, address tokenB, int24 tickSpacing)
        internal
        view
        returns (ICLPool pool)
    {
        return verifyCallback(factory, PoolAddress.getPoolKey(tokenA, tokenB, tickSpacing));
    }

    /// @notice Returns the address of a valid CL Pool
    /// @param factory The contract address of the CL factory
    /// @param poolKey The identifying key of the V3 pool
    /// @return pool The V3 pool contract address
    function verifyCallback(address factory, PoolAddress.PoolKey memory poolKey) internal view returns (ICLPool pool) {
        pool = ICLPool(PoolAddress.computeAddress(factory, poolKey));
        require(msg.sender == address(pool));
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.6.0;

import "./BytesLib.sol";

/// @title Functions for manipulating path data for multihop swaps
library Path {
    using BytesLib for bytes;

    /// @dev The length of the bytes encoded address
    uint256 private constant ADDR_SIZE = 20;
    /// @dev The length of the bytes encoded fee
    uint256 private constant FEE_SIZE = 3;

    /// @dev The offset of a single token address and pool fee
    uint256 private constant NEXT_OFFSET = ADDR_SIZE + FEE_SIZE;
    /// @dev The offset of an encoded pool key
    uint256 private constant POP_OFFSET = NEXT_OFFSET + ADDR_SIZE;
    /// @dev The minimum length of an encoding that contains 2 or more pools
    uint256 private constant MULTIPLE_POOLS_MIN_LENGTH = POP_OFFSET + NEXT_OFFSET;

    /// @notice Returns true iff the path contains two or more pools
    /// @param path The encoded swap path
    /// @return True if path contains two or more pools, otherwise false
    function hasMultiplePools(bytes memory path) internal pure returns (bool) {
        return path.length >= MULTIPLE_POOLS_MIN_LENGTH;
    }

    /// @notice Returns the number of pools in the path
    /// @param path The encoded swap path
    /// @return The number of pools in the path
    function numPools(bytes memory path) internal pure returns (uint256) {
        // Ignore the first token address. From then on every tick spacing and token offset indicates a pool.
        return ((path.length - ADDR_SIZE) / NEXT_OFFSET);
    }

    /// @notice Decodes the first pool in path
    /// @param path The bytes encoded swap path
    /// @return tokenA The first token of the given pool
    /// @return tokenB The second token of the given pool
    /// @return tickSpacing The tick spacing of the pool
    function decodeFirstPool(bytes memory path)
        internal
        pure
        returns (address tokenA, address tokenB, int24 tickSpacing)
    {
        tokenA = path.toAddress(0);
        tickSpacing = path.toInt24(ADDR_SIZE);
        tokenB = path.toAddress(NEXT_OFFSET);
    }

    /// @notice Gets the segment corresponding to the first pool in the path
    /// @param path The bytes encoded swap path
    /// @return The segment containing all data necessary to target the first pool in the path
    function getFirstPool(bytes memory path) internal pure returns (bytes memory) {
        return path.slice(0, POP_OFFSET);
    }

    /// @notice Skips a token + fee element from the buffer and returns the remainder
    /// @param path The swap path
    /// @return The remaining token + fee elements in the path
    function skipToken(bytes memory path) internal pure returns (bytes memory) {
        return path.slice(NEXT_OFFSET, path.length - NEXT_OFFSET);
    }
}

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

import "contracts/core/interfaces/ICLFactory.sol";
import "@openzeppelin/contracts/proxy/Clones.sol";

/// @title Provides functions for deriving a pool address from the factory, tokens, and the fee
library PoolAddress {
    /// @notice The identifying key of the pool
    struct PoolKey {
        address token0;
        address token1;
        int24 tickSpacing;
    }

    /// @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 tickSpacing The tick spacing of the pool
    /// @return Poolkey The pool details with ordered token0 and token1 assignments
    function getPoolKey(address tokenA, address tokenB, int24 tickSpacing) internal pure returns (PoolKey memory) {
        if (tokenA > tokenB) (tokenA, tokenB) = (tokenB, tokenA);
        return PoolKey({token0: tokenA, token1: tokenB, tickSpacing: tickSpacing});
    }

    /// @notice Deterministically computes the pool address given the factory and PoolKey
    /// @param factory The CL factory contract address
    /// @param key The PoolKey
    /// @return pool The contract address of the V3 pool
    function computeAddress(address factory, PoolKey memory key) internal view returns (address pool) {
        require(key.token0 < key.token1);
        pool = Clones.predictDeterministicAddress({
            master: ICLFactory(factory).poolImplementation(),
            salt: keccak256(abi.encode(key.token0, key.token1, key.tickSpacing)),
            deployer: factory
        });
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.6.0;

import "contracts/core/interfaces/ICLPool.sol";

library PoolTicksCounter {
    /// @dev This function counts the number of initialized ticks that would incur a gas cost between tickBefore and tickAfter.
    /// When tickBefore and/or tickAfter themselves are initialized, the logic over whether we should count them depends on the
    /// direction of the swap. If we are swapping upwards (tickAfter > tickBefore) we don't want to count tickBefore but we do
    /// want to count tickAfter. The opposite is true if we are swapping downwards.
    function countInitializedTicksCrossed(ICLPool self, int24 tickBefore, int24 tickAfter)
        internal
        view
        returns (uint32 initializedTicksCrossed)
    {
        int16 wordPosLower;
        int16 wordPosHigher;
        uint8 bitPosLower;
        uint8 bitPosHigher;
        bool tickBeforeInitialized;
        bool tickAfterInitialized;

        {
            // Get the key and offset in the tick bitmap of the active tick before and after the swap.
            int16 wordPos = int16((tickBefore / self.tickSpacing()) >> 8);
            uint8 bitPos = uint8((tickBefore / self.tickSpacing()) % 256);

            int16 wordPosAfter = int16((tickAfter / self.tickSpacing()) >> 8);
            uint8 bitPosAfter = uint8((tickAfter / self.tickSpacing()) % 256);

            // In the case where tickAfter is initialized, we only want to count it if we are swapping downwards.
            // If the initializable tick after the swap is initialized, our original tickAfter is a
            // multiple of tick spacing, and we are swapping downwards we know that tickAfter is initialized
            // and we shouldn't count it.
            tickAfterInitialized = ((self.tickBitmap(wordPosAfter) & (1 << bitPosAfter)) > 0)
                && ((tickAfter % self.tickSpacing()) == 0) && (tickBefore > tickAfter);

            // In the case where tickBefore is initialized, we only want to count it if we are swapping upwards.
            // Use the same logic as above to decide whether we should count tickBefore or not.
            tickBeforeInitialized = ((self.tickBitmap(wordPos) & (1 << bitPos)) > 0)
                && ((tickBefore % self.tickSpacing()) == 0) && (tickBefore < tickAfter);

            if (wordPos < wordPosAfter || (wordPos == wordPosAfter && bitPos <= bitPosAfter)) {
                wordPosLower = wordPos;
                bitPosLower = bitPos;
                wordPosHigher = wordPosAfter;
                bitPosHigher = bitPosAfter;
            } else {
                wordPosLower = wordPosAfter;
                bitPosLower = bitPosAfter;
                wordPosHigher = wordPos;
                bitPosHigher = bitPos;
            }
        }

        // Count the number of initialized ticks crossed by iterating through the tick bitmap.
        // Our first mask should include the lower tick and everything to its left.
        uint256 mask = type(uint256).max << bitPosLower;
        while (wordPosLower <= wordPosHigher) {
            // If we're on the final tick bitmap page, ensure we only count up to our
            // ending tick.
            if (wordPosLower == wordPosHigher) {
                mask = mask & (type(uint256).max >> (255 - bitPosHigher));
            }

            uint256 masked = self.tickBitmap(wordPosLower) & mask;
            initializedTicksCrossed += countOneBits(masked);
            wordPosLower++;
            // Reset our mask so we consider all bits on the next iteration.
            mask = type(uint256).max;
        }

        if (tickAfterInitialized) {
            initializedTicksCrossed -= 1;
        }

        if (tickBeforeInitialized) {
            initializedTicksCrossed -= 1;
        }

        return initializedTicksCrossed;
    }

    function countOneBits(uint256 x) private pure returns (uint16) {
        uint16 bits = 0;
        while (x != 0) {
            bits++;
            x &= (x - 1);
        }
        return bits;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
 * deploying minimal proxy contracts, also known as "clones".
 *
 * > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
 * > a minimal bytecode implementation that delegates all calls to a known, fixed address.
 *
 * The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
 * (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
 * deterministic method.
 *
 * _Available since v3.4._
 */
library Clones {
    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `master`.
     *
     * This function uses the create opcode, which should never revert.
     */
    function clone(address master) internal returns (address instance) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, master))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create(0, ptr, 0x37)
        }
        require(instance != address(0), "ERC1167: create failed");
    }

    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `master`.
     *
     * This function uses the create2 opcode and a `salt` to deterministically deploy
     * the clone. Using the same `master` and `salt` multiple time will revert, since
     * the clones cannot be deployed twice at the same address.
     */
    function cloneDeterministic(address master, bytes32 salt) internal returns (address instance) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, master))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create2(0, ptr, 0x37, salt)
        }
        require(instance != address(0), "ERC1167: create2 failed");
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address master, bytes32 salt, address deployer) internal pure returns (address predicted) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, master))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
            mstore(add(ptr, 0x38), shl(0x60, deployer))
            mstore(add(ptr, 0x4c), salt)
            mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
            predicted := keccak256(add(ptr, 0x37), 0x55)
        }
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address master, bytes32 salt) internal view returns (address predicted) {
        return predictDeterministicAddress(master, salt, address(this));
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "bytecodeHash": "none",
    "useLiteralContent": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "@nomad-xyz/=lib/ExcessivelySafeCall/",
    "@openzeppelin/=lib/openzeppelin-contracts/",
    "@uniswap/=lib/solidity-lib/",
    "ExcessivelySafeCall/=lib/ExcessivelySafeCall/src/",
    "base64-sol/=lib/base64/",
    "base64/=lib/base64/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/contracts/",
    "solidity-lib/=lib/solidity-lib/contracts/"
  ],
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_factory","type":"address"},{"internalType":"address","name":"_WETH9","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"WETH9","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"path","type":"bytes"},{"internalType":"uint256","name":"amountIn","type":"uint256"}],"name":"quoteExactInput","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint160[]","name":"sqrtPriceX96AfterList","type":"uint160[]"},{"internalType":"uint32[]","name":"initializedTicksCrossedList","type":"uint32[]"},{"internalType":"uint256","name":"gasEstimate","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"int24","name":"tickSpacing","type":"int24"},{"internalType":"uint160","name":"sqrtPriceLimitX96","type":"uint160"}],"internalType":"struct IQuoterV2.QuoteExactInputSingleParams","name":"params","type":"tuple"}],"name":"quoteExactInputSingle","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint160","name":"sqrtPriceX96After","type":"uint160"},{"internalType":"uint32","name":"initializedTicksCrossed","type":"uint32"},{"internalType":"uint256","name":"gasEstimate","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"path","type":"bytes"},{"internalType":"uint256","name":"amountOut","type":"uint256"}],"name":"quoteExactOutput","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint160[]","name":"sqrtPriceX96AfterList","type":"uint160[]"},{"internalType":"uint32[]","name":"initializedTicksCrossedList","type":"uint32[]"},{"internalType":"uint256","name":"gasEstimate","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"int24","name":"tickSpacing","type":"int24"},{"internalType":"uint160","name":"sqrtPriceLimitX96","type":"uint160"}],"internalType":"struct IQuoterV2.QuoteExactOutputSingleParams","name":"params","type":"tuple"}],"name":"quoteExactOutputSingle","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint160","name":"sqrtPriceX96After","type":"uint160"},{"internalType":"uint32","name":"initializedTicksCrossed","type":"uint32"},{"internalType":"uint256","name":"gasEstimate","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"int256","name":"amount0Delta","type":"int256"},{"internalType":"int256","name":"amount1Delta","type":"int256"},{"internalType":"bytes","name":"path","type":"bytes"}],"name":"uniswapV3SwapCallback","outputs":[],"stateMutability":"view","type":"function"}]

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000000000000000000000000d78a40ca54090f4178c9c9212c78e9e0c27222310000000000000000000000004200000000000000000000000000000000000006

-----Decoded View---------------
Arg [0] : _factory (address): 0xD78a40cA54090f4178c9c9212c78e9E0C2722231
Arg [1] : _WETH9 (address): 0x4200000000000000000000000000000000000006

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000d78a40ca54090f4178c9c9212c78e9e0c2722231
Arg [1] : 0000000000000000000000004200000000000000000000000000000000000006