Contract 0xe34139463bA50bD61336E0c446Bd8C0867c6fE65 16

 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x40c01657c8ba924c17b5fc786bbfb227f932d2cde8132a3ff8e1c6ada5f04872Create Incentive1867123522024-03-03 14:47:2725 days 15 hrs ago0xe2cb6266cefcc70aabb802fb9e35ea767f4d15dd IN  Uniswap V3: Staker 1.0.20 ETH0.00018538 0.1
0xb348a3196c0b909a6fe0c2bd6c9301568b100c7c8cc4aa378d9fd482df6ceda4Create Incentive1151076002023-07-26 11:25:40246 days 19 hrs ago0xdefda66dd1556218a06d4d1eea951cc3b3cc89f9 IN  Uniswap V3: Staker 1.0.20 ETH0.00007368 0.1
0x83b369acf1a4f043bbb2f7c29874f38a434033035217bc54af13054d87ae8be1Withdraw Token1008773472023-06-13 22:15:56289 days 8 hrs ago0x74f9233a19fe5486d350807f18a0e923b36ee359 IN  Uniswap V3: Staker 1.0.20 ETH0.00005049 0.1
0x6b4dd511de83db1f3b476af547a7d1dcaaaaa62509e9fdd8da927156e9e58180Withdraw Token1008772822023-06-13 22:15:39289 days 8 hrs ago0x74f9233a19fe5486d350807f18a0e923b36ee359 IN  Uniswap V3: Staker 1.0.20 ETH0.00005049 0.1
0xc45306e9672293b829f1108477f98eba7a79ca30d376471aebd0b821930837e2Withdraw Token1008772162023-06-13 22:15:23289 days 8 hrs ago0x74f9233a19fe5486d350807f18a0e923b36ee359 IN  Uniswap V3: Staker 1.0.20 ETH0.0000522 0.1
0x5e130092093d765ea47dac3e42e538a9597487088c82b57fb841718935dac528Claim Reward1008767082023-06-13 22:13:12289 days 8 hrs ago0x74f9233a19fe5486d350807f18a0e923b36ee359 IN  Uniswap V3: Staker 1.0.20 ETH0.00003876 0.1
0x785fffe38df577fdcebb5d4082f56a73a20dc184ad7d78ca5dcd21e532d6f5dfUnstake Token1008766162023-06-13 22:12:51289 days 8 hrs ago0x74f9233a19fe5486d350807f18a0e923b36ee359 IN  Uniswap V3: Staker 1.0.20 ETH0.00005558 0.1
0x2467db24d07ccab3c3a44458f8b2c64775656b972e89dec7056fd677785e7045Unstake Token1008765602023-06-13 22:12:37289 days 8 hrs ago0x74f9233a19fe5486d350807f18a0e923b36ee359 IN  Uniswap V3: Staker 1.0.20 ETH0.00005558 0.1
0xd6eb76dfb9e6f4dc2653576b9813ca6ca4a482249cd2fd3663049dfd55b82beaUnstake Token1008765072023-06-13 22:12:24289 days 8 hrs ago0x74f9233a19fe5486d350807f18a0e923b36ee359 IN  Uniswap V3: Staker 1.0.20 ETH0.00005729 0.1
0xdd10ef7b44d6de75c2ef11fef8bb33932e30183e0631a7ae701464bc5ef8914fWithdraw Token1008317632023-06-13 18:59:01289 days 11 hrs ago0x45a5068955fce555922009b90a8f13bca8f1547c IN  Uniswap V3: Staker 1.0.20 ETH0.00005125 0.1
0xbcbe69d740805ed11a0c7c91694263ee6b36735222a01087290311a0f2f65b53Withdraw Token1008315042023-06-13 18:57:56289 days 11 hrs ago0x45a5068955fce555922009b90a8f13bca8f1547c IN  Uniswap V3: Staker 1.0.20 ETH0.00005296 0.1
0xbdef9a54b878a1aa236b6ca3ebb51c5bbf83b95cdb707a520ad950db389ad1bcUnstake Token1008302642023-06-13 18:52:42289 days 11 hrs ago0x45a5068955fce555922009b90a8f13bca8f1547c IN  Uniswap V3: Staker 1.0.20 ETH0.00005501 0.1
0xb5df62bb61f5e926a6764a4a885200b0bc95baed71912834a1e67fc763c14f84Unstake Token1008302402023-06-13 18:52:36289 days 11 hrs ago0x45a5068955fce555922009b90a8f13bca8f1547c IN  Uniswap V3: Staker 1.0.20 ETH0.00005672 0.1
0x27b177f7d1b4b3cb55d418e89f6afad2da132b4efcf176deaf2c89e9950b4797Withdraw Token1008283562023-06-13 18:44:41289 days 11 hrs ago0xf2fb34c4323f9bf4a5c04fe277f96588dde5316f IN  Uniswap V3: Staker 1.0.20 ETH0.0000527 0.1
0x08c5a7308518d261bac2e72ec5580d823a4842c00fba55d2124f5797d77d9d19Withdraw Token1008283412023-06-13 18:44:37289 days 11 hrs ago0xf2fb34c4323f9bf4a5c04fe277f96588dde5316f IN  Uniswap V3: Staker 1.0.20 ETH0.0000527 0.1
0xa83bdc54a197ce19f8ad9c1d66d5c637937af016541762d10435798703c9d0c4Unstake Token1008282992023-06-13 18:44:27289 days 11 hrs ago0xf2fb34c4323f9bf4a5c04fe277f96588dde5316f IN  Uniswap V3: Staker 1.0.20 ETH0.00005858 0.1
0xfb86cd697e670c74f8c635316bffd65bb303f0e7023d1dbe7bef28abaa68138cUnstake Token1008282862023-06-13 18:44:23289 days 11 hrs ago0xf2fb34c4323f9bf4a5c04fe277f96588dde5316f IN  Uniswap V3: Staker 1.0.20 ETH0.00005858 0.1
0xc8a6129130874dcdf693d68fd55325add0629b0426e3639ed6db3d167f07f07fWithdraw Token1008078752023-06-13 17:18:25289 days 13 hrs ago0x53efef05934f2243085cbbee94ca860fc1863cad IN  Uniswap V3: Staker 1.0.20 ETH0.00008925 0.1
0x1753f0dbfd1091ae749422a46f2ba387765a895d1d4daa9472b30c7a14f53ec4Unstake Token1008077932023-06-13 17:18:04289 days 13 hrs ago0x53efef05934f2243085cbbee94ca860fc1863cad IN  Uniswap V3: Staker 1.0.20 ETH0.00010446 0.1
0xf380a37fa0cc01376b4e193121053de8fdb86d469c2287ce6af2ea67ff2992fdWithdraw Token1008066012023-06-13 17:13:01289 days 13 hrs ago0xf2fb34c4323f9bf4a5c04fe277f96588dde5316f IN  Uniswap V3: Staker 1.0.20 ETH0.00008816 0.1
0x2b6573c3b09f009e130621b2e908ef9f1fa319d69b742ac2c6ae2abf4cf5d407Withdraw Token1008065862023-06-13 17:12:57289 days 13 hrs ago0xf2fb34c4323f9bf4a5c04fe277f96588dde5316f IN  Uniswap V3: Staker 1.0.20 ETH0.00008816 0.1
0x840547d01cf010432c8bafc7c787712d2a86e146da60c5138407749757400cacUnstake Token1008065102023-06-13 17:12:38289 days 13 hrs ago0xf2fb34c4323f9bf4a5c04fe277f96588dde5316f IN  Uniswap V3: Staker 1.0.20 ETH0.00010338 0.1
0x73eaf14d62a6a0fc3b536a54c1a300d768e4d95c86871b9398ee0279ebb796fbUnstake Token1008064942023-06-13 17:12:34289 days 13 hrs ago0xf2fb34c4323f9bf4a5c04fe277f96588dde5316f IN  Uniswap V3: Staker 1.0.20 ETH0.00010509 0.1
0x5e2af97bba98f0b2cc6a814843ef43c66502c3979ff6f6e372bd73367871aee2Withdraw Token1008064562023-06-13 17:12:25289 days 13 hrs ago0x5ec3e02105ff5224dea33cbf47498ae726cbc69d IN  Uniswap V3: Staker 1.0.20 ETH0.00008687 0.1
0xec14056f50cfddafa1d5ef15fac0c9b4703ad660cdf5d16e3cdfa968377e8edfWithdraw Token1008064402023-06-13 17:12:21289 days 13 hrs ago0x5ec3e02105ff5224dea33cbf47498ae726cbc69d IN  Uniswap V3: Staker 1.0.20 ETH0.00008956 0.1
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x2b90fd82aa13bfb05a2d585c9c5e7e7a6ec9d5470173b0a1785e7b44cbf8971b506730472023-01-04 1:47:08450 days 4 hrs ago Uniswap V3: Staker 1.0.2 0x471f8e297f79b2e307e1c9d647cc3581e8d415560 ETH
0x1275772c3408541739545917fde5105976eb5bcb3f902fd01696677b2c75b350486848882022-12-25 6:54:09459 days 23 hrs ago Uniswap V3: Staker 1.0.2 Wrapped Ether0 ETH
0x1275772c3408541739545917fde5105976eb5bcb3f902fd01696677b2c75b350486848882022-12-25 6:54:09459 days 23 hrs ago 0x3a1bdf94aecffb0448a1350840f953f376c82a77 Uniswap V3: Staker 1.0.20 ETH
0x9a3e60c63bf85646a7c9664d295f3424edb427d38b56e18baf94cf21fb76b593131125232022-05-28 7:06:14670 days 23 hrs ago Uniswap V3: Staker 1.0.2 Uniswap V3: Positions NFT0 ETH
0x9a3e60c63bf85646a7c9664d295f3424edb427d38b56e18baf94cf21fb76b593131125232022-05-28 7:06:14670 days 23 hrs ago 0xb86efc30a915e3d65938d888952485033a25a3cf Uniswap V3: Staker 1.0.20 ETH
0x9a3e60c63bf85646a7c9664d295f3424edb427d38b56e18baf94cf21fb76b593131125232022-05-28 7:06:14670 days 23 hrs ago Uniswap V3: Staker 1.0.2 0x17c14d2c404d167802b16c450d3c99f88f2c4f4d0 ETH
0x9a3e60c63bf85646a7c9664d295f3424edb427d38b56e18baf94cf21fb76b593131125232022-05-28 7:06:14670 days 23 hrs ago 0xb86efc30a915e3d65938d888952485033a25a3cf Uniswap V3: Staker 1.0.20 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago 0xb86efc30a915e3d65938d888952485033a25a3cf Uniswap V3: Staker 1.0.20 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago Uniswap V3: Staker 1.0.2 0x17c14d2c404d167802b16c450d3c99f88f2c4f4d0 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago Uniswap V3: Staker 1.0.2 Uniswap V3: Positions NFT0 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago Uniswap V3: Staker 1.0.2 0x17c14d2c404d167802b16c450d3c99f88f2c4f4d0 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago Uniswap V3: Staker 1.0.2 Uniswap V3: Positions NFT0 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago Uniswap V3: Positions NFT Uniswap V3: Staker 1.0.20 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago 0xb86efc30a915e3d65938d888952485033a25a3cf Uniswap V3: Staker 1.0.20 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago 0xb86efc30a915e3d65938d888952485033a25a3cf Uniswap V3: Staker 1.0.20 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago 0xb86efc30a915e3d65938d888952485033a25a3cf Uniswap V3: Staker 1.0.20 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago Uniswap V3: Staker 1.0.2 Uniswap V3: Positions NFT0 ETH
0xbcc162bfc93f14b1865cdafa5813c3422bafb41e58db1068dfa12345580fa909131090702022-05-28 5:51:32671 days 50 mins ago Uniswap V3: Staker 1.0.2 Wrapped Ether0 ETH
0x2df973fce1eeca75658bf95c621917eef1065b349d9e2967b5bc275023eba7ac131057662022-05-28 4:37:39671 days 2 hrs ago 0xb86efc30a915e3d65938d888952485033a25a3cf Uniswap V3: Staker 1.0.20 ETH
0x2df973fce1eeca75658bf95c621917eef1065b349d9e2967b5bc275023eba7ac131057662022-05-28 4:37:39671 days 2 hrs ago Uniswap V3: Staker 1.0.2 0x17c14d2c404d167802b16c450d3c99f88f2c4f4d0 ETH
0x2df973fce1eeca75658bf95c621917eef1065b349d9e2967b5bc275023eba7ac131057662022-05-28 4:37:39671 days 2 hrs ago Uniswap V3: Staker 1.0.2 Uniswap V3: Positions NFT0 ETH
0x2df973fce1eeca75658bf95c621917eef1065b349d9e2967b5bc275023eba7ac131057662022-05-28 4:37:39671 days 2 hrs ago Uniswap V3: Staker 1.0.2 0x17c14d2c404d167802b16c450d3c99f88f2c4f4d0 ETH
0x2df973fce1eeca75658bf95c621917eef1065b349d9e2967b5bc275023eba7ac131057662022-05-28 4:37:39671 days 2 hrs ago Uniswap V3: Staker 1.0.2 Uniswap V3: Positions NFT0 ETH
0x2df973fce1eeca75658bf95c621917eef1065b349d9e2967b5bc275023eba7ac131057662022-05-28 4:37:39671 days 2 hrs ago Uniswap V3: Positions NFT Uniswap V3: Staker 1.0.20 ETH
0x2df973fce1eeca75658bf95c621917eef1065b349d9e2967b5bc275023eba7ac131057662022-05-28 4:37:39671 days 2 hrs ago 0xb86efc30a915e3d65938d888952485033a25a3cf Uniswap V3: Staker 1.0.20 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
UniswapV3Staker

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 1000000 runs

Other Settings:
default evmVersion
File 1 of 33 : UniswapV3Staker.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;
pragma abicoder v2;

import './interfaces/IUniswapV3Staker.sol';
import './libraries/IncentiveId.sol';
import './libraries/RewardMath.sol';
import './libraries/NFTPositionInfo.sol';
import './libraries/TransferHelperExtended.sol';

import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Factory.sol';
import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol';
import '@uniswap/v3-core/contracts/interfaces/IERC20Minimal.sol';

import '@uniswap/v3-periphery/contracts/interfaces/INonfungiblePositionManager.sol';
import '@uniswap/v3-periphery/contracts/base/Multicall.sol';

/// @title Uniswap V3 canonical staking interface
contract UniswapV3Staker is IUniswapV3Staker, Multicall {
    /// @notice Represents a staking incentive
    struct Incentive {
        uint256 totalRewardUnclaimed;
        uint160 totalSecondsClaimedX128;
        uint96 numberOfStakes;
    }

    /// @notice Represents the deposit of a liquidity NFT
    struct Deposit {
        address owner;
        uint48 numberOfStakes;
        int24 tickLower;
        int24 tickUpper;
    }

    /// @notice Represents a staked liquidity NFT
    struct Stake {
        uint160 secondsPerLiquidityInsideInitialX128;
        uint96 liquidityNoOverflow;
        uint128 liquidityIfOverflow;
    }

    /// @inheritdoc IUniswapV3Staker
    IUniswapV3Factory public immutable override factory;
    /// @inheritdoc IUniswapV3Staker
    INonfungiblePositionManager public immutable override nonfungiblePositionManager;

    /// @inheritdoc IUniswapV3Staker
    uint256 public immutable override maxIncentiveStartLeadTime;
    /// @inheritdoc IUniswapV3Staker
    uint256 public immutable override maxIncentiveDuration;

    /// @dev bytes32 refers to the return value of IncentiveId.compute
    mapping(bytes32 => Incentive) public override incentives;

    /// @dev deposits[tokenId] => Deposit
    mapping(uint256 => Deposit) public override deposits;

    /// @dev stakes[tokenId][incentiveHash] => Stake
    mapping(uint256 => mapping(bytes32 => Stake)) private _stakes;

    /// @inheritdoc IUniswapV3Staker
    function stakes(uint256 tokenId, bytes32 incentiveId)
        public
        view
        override
        returns (uint160 secondsPerLiquidityInsideInitialX128, uint128 liquidity)
    {
        Stake storage stake = _stakes[tokenId][incentiveId];
        secondsPerLiquidityInsideInitialX128 = stake.secondsPerLiquidityInsideInitialX128;
        liquidity = stake.liquidityNoOverflow;
        if (liquidity == type(uint96).max) {
            liquidity = stake.liquidityIfOverflow;
        }
    }

    /// @dev rewards[rewardToken][owner] => uint256
    /// @inheritdoc IUniswapV3Staker
    mapping(IERC20Minimal => mapping(address => uint256)) public override rewards;

    /// @param _factory the Uniswap V3 factory
    /// @param _nonfungiblePositionManager the NFT position manager contract address
    /// @param _maxIncentiveStartLeadTime the max duration of an incentive in seconds
    /// @param _maxIncentiveDuration the max amount of seconds into the future the incentive startTime can be set
    constructor(
        IUniswapV3Factory _factory,
        INonfungiblePositionManager _nonfungiblePositionManager,
        uint256 _maxIncentiveStartLeadTime,
        uint256 _maxIncentiveDuration
    ) {
        factory = _factory;
        nonfungiblePositionManager = _nonfungiblePositionManager;
        maxIncentiveStartLeadTime = _maxIncentiveStartLeadTime;
        maxIncentiveDuration = _maxIncentiveDuration;
    }

    /// @inheritdoc IUniswapV3Staker
    function createIncentive(IncentiveKey memory key, uint256 reward) external override {
        require(reward > 0, 'UniswapV3Staker::createIncentive: reward must be positive');
        require(
            block.timestamp <= key.startTime,
            'UniswapV3Staker::createIncentive: start time must be now or in the future'
        );
        require(
            key.startTime - block.timestamp <= maxIncentiveStartLeadTime,
            'UniswapV3Staker::createIncentive: start time too far into future'
        );
        require(key.startTime < key.endTime, 'UniswapV3Staker::createIncentive: start time must be before end time');
        require(
            key.endTime - key.startTime <= maxIncentiveDuration,
            'UniswapV3Staker::createIncentive: incentive duration is too long'
        );

        bytes32 incentiveId = IncentiveId.compute(key);

        incentives[incentiveId].totalRewardUnclaimed += reward;

        TransferHelperExtended.safeTransferFrom(address(key.rewardToken), msg.sender, address(this), reward);

        emit IncentiveCreated(key.rewardToken, key.pool, key.startTime, key.endTime, key.refundee, reward);
    }

    /// @inheritdoc IUniswapV3Staker
    function endIncentive(IncentiveKey memory key) external override returns (uint256 refund) {
        require(block.timestamp >= key.endTime, 'UniswapV3Staker::endIncentive: cannot end incentive before end time');

        bytes32 incentiveId = IncentiveId.compute(key);
        Incentive storage incentive = incentives[incentiveId];

        refund = incentive.totalRewardUnclaimed;

        require(refund > 0, 'UniswapV3Staker::endIncentive: no refund available');
        require(
            incentive.numberOfStakes == 0,
            'UniswapV3Staker::endIncentive: cannot end incentive while deposits are staked'
        );

        // issue the refund
        incentive.totalRewardUnclaimed = 0;
        TransferHelperExtended.safeTransfer(address(key.rewardToken), key.refundee, refund);

        // note we never clear totalSecondsClaimedX128

        emit IncentiveEnded(incentiveId, refund);
    }

    /// @notice Upon receiving a Uniswap V3 ERC721, creates the token deposit setting owner to `from`. Also stakes token
    /// in one or more incentives if properly formatted `data` has a length > 0.
    /// @inheritdoc IERC721Receiver
    function onERC721Received(
        address,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external override returns (bytes4) {
        require(
            msg.sender == address(nonfungiblePositionManager),
            'UniswapV3Staker::onERC721Received: not a univ3 nft'
        );

        (, , , , , int24 tickLower, int24 tickUpper, , , , , ) = nonfungiblePositionManager.positions(tokenId);

        deposits[tokenId] = Deposit({owner: from, numberOfStakes: 0, tickLower: tickLower, tickUpper: tickUpper});
        emit DepositTransferred(tokenId, address(0), from);

        if (data.length > 0) {
            if (data.length == 160) {
                _stakeToken(abi.decode(data, (IncentiveKey)), tokenId);
            } else {
                IncentiveKey[] memory keys = abi.decode(data, (IncentiveKey[]));
                for (uint256 i = 0; i < keys.length; i++) {
                    _stakeToken(keys[i], tokenId);
                }
            }
        }
        return this.onERC721Received.selector;
    }

    /// @inheritdoc IUniswapV3Staker
    function transferDeposit(uint256 tokenId, address to) external override {
        require(to != address(0), 'UniswapV3Staker::transferDeposit: invalid transfer recipient');
        address owner = deposits[tokenId].owner;
        require(owner == msg.sender, 'UniswapV3Staker::transferDeposit: can only be called by deposit owner');
        deposits[tokenId].owner = to;
        emit DepositTransferred(tokenId, owner, to);
    }

    /// @inheritdoc IUniswapV3Staker
    function withdrawToken(
        uint256 tokenId,
        address to,
        bytes memory data
    ) external override {
        require(to != address(this), 'UniswapV3Staker::withdrawToken: cannot withdraw to staker');
        Deposit memory deposit = deposits[tokenId];
        require(deposit.numberOfStakes == 0, 'UniswapV3Staker::withdrawToken: cannot withdraw token while staked');
        require(deposit.owner == msg.sender, 'UniswapV3Staker::withdrawToken: only owner can withdraw token');

        delete deposits[tokenId];
        emit DepositTransferred(tokenId, deposit.owner, address(0));

        nonfungiblePositionManager.safeTransferFrom(address(this), to, tokenId, data);
    }

    /// @inheritdoc IUniswapV3Staker
    function stakeToken(IncentiveKey memory key, uint256 tokenId) external override {
        require(deposits[tokenId].owner == msg.sender, 'UniswapV3Staker::stakeToken: only owner can stake token');

        _stakeToken(key, tokenId);
    }

    /// @inheritdoc IUniswapV3Staker
    function unstakeToken(IncentiveKey memory key, uint256 tokenId) external override {
        Deposit memory deposit = deposits[tokenId];
        // anyone can call unstakeToken if the block time is after the end time of the incentive
        if (block.timestamp < key.endTime) {
            require(
                deposit.owner == msg.sender,
                'UniswapV3Staker::unstakeToken: only owner can withdraw token before incentive end time'
            );
        }

        bytes32 incentiveId = IncentiveId.compute(key);

        (uint160 secondsPerLiquidityInsideInitialX128, uint128 liquidity) = stakes(tokenId, incentiveId);

        require(liquidity != 0, 'UniswapV3Staker::unstakeToken: stake does not exist');

        Incentive storage incentive = incentives[incentiveId];

        deposits[tokenId].numberOfStakes--;
        incentive.numberOfStakes--;

        (, uint160 secondsPerLiquidityInsideX128, ) =
            key.pool.snapshotCumulativesInside(deposit.tickLower, deposit.tickUpper);
        (uint256 reward, uint160 secondsInsideX128) =
            RewardMath.computeRewardAmount(
                incentive.totalRewardUnclaimed,
                incentive.totalSecondsClaimedX128,
                key.startTime,
                key.endTime,
                liquidity,
                secondsPerLiquidityInsideInitialX128,
                secondsPerLiquidityInsideX128,
                block.timestamp
            );

        // if this overflows, e.g. after 2^32-1 full liquidity seconds have been claimed,
        // reward rate will fall drastically so it's safe
        incentive.totalSecondsClaimedX128 += secondsInsideX128;
        // reward is never greater than total reward unclaimed
        incentive.totalRewardUnclaimed -= reward;
        // this only overflows if a token has a total supply greater than type(uint256).max
        rewards[key.rewardToken][deposit.owner] += reward;

        Stake storage stake = _stakes[tokenId][incentiveId];
        delete stake.secondsPerLiquidityInsideInitialX128;
        delete stake.liquidityNoOverflow;
        if (liquidity >= type(uint96).max) delete stake.liquidityIfOverflow;
        emit TokenUnstaked(tokenId, incentiveId);
    }

    /// @inheritdoc IUniswapV3Staker
    function claimReward(
        IERC20Minimal rewardToken,
        address to,
        uint256 amountRequested
    ) external override returns (uint256 reward) {
        reward = rewards[rewardToken][msg.sender];
        if (amountRequested != 0 && amountRequested < reward) {
            reward = amountRequested;
        }

        rewards[rewardToken][msg.sender] -= reward;
        TransferHelperExtended.safeTransfer(address(rewardToken), to, reward);

        emit RewardClaimed(to, reward);
    }

    /// @inheritdoc IUniswapV3Staker
    function getRewardInfo(IncentiveKey memory key, uint256 tokenId)
        external
        view
        override
        returns (uint256 reward, uint160 secondsInsideX128)
    {
        bytes32 incentiveId = IncentiveId.compute(key);

        (uint160 secondsPerLiquidityInsideInitialX128, uint128 liquidity) = stakes(tokenId, incentiveId);
        require(liquidity > 0, 'UniswapV3Staker::getRewardInfo: stake does not exist');

        Deposit memory deposit = deposits[tokenId];
        Incentive memory incentive = incentives[incentiveId];

        (, uint160 secondsPerLiquidityInsideX128, ) =
            key.pool.snapshotCumulativesInside(deposit.tickLower, deposit.tickUpper);

        (reward, secondsInsideX128) = RewardMath.computeRewardAmount(
            incentive.totalRewardUnclaimed,
            incentive.totalSecondsClaimedX128,
            key.startTime,
            key.endTime,
            liquidity,
            secondsPerLiquidityInsideInitialX128,
            secondsPerLiquidityInsideX128,
            block.timestamp
        );
    }

    /// @dev Stakes a deposited token without doing an ownership check
    function _stakeToken(IncentiveKey memory key, uint256 tokenId) private {
        require(block.timestamp >= key.startTime, 'UniswapV3Staker::stakeToken: incentive not started');
        require(block.timestamp < key.endTime, 'UniswapV3Staker::stakeToken: incentive ended');

        bytes32 incentiveId = IncentiveId.compute(key);

        require(
            incentives[incentiveId].totalRewardUnclaimed > 0,
            'UniswapV3Staker::stakeToken: non-existent incentive'
        );
        require(
            _stakes[tokenId][incentiveId].liquidityNoOverflow == 0,
            'UniswapV3Staker::stakeToken: token already staked'
        );

        (IUniswapV3Pool pool, int24 tickLower, int24 tickUpper, uint128 liquidity) =
            NFTPositionInfo.getPositionInfo(factory, nonfungiblePositionManager, tokenId);

        require(pool == key.pool, 'UniswapV3Staker::stakeToken: token pool is not the incentive pool');
        require(liquidity > 0, 'UniswapV3Staker::stakeToken: cannot stake token with 0 liquidity');

        deposits[tokenId].numberOfStakes++;
        incentives[incentiveId].numberOfStakes++;

        (, uint160 secondsPerLiquidityInsideX128, ) = pool.snapshotCumulativesInside(tickLower, tickUpper);

        if (liquidity >= type(uint96).max) {
            _stakes[tokenId][incentiveId] = Stake({
                secondsPerLiquidityInsideInitialX128: secondsPerLiquidityInsideX128,
                liquidityNoOverflow: type(uint96).max,
                liquidityIfOverflow: liquidity
            });
        } else {
            Stake storage stake = _stakes[tokenId][incentiveId];
            stake.secondsPerLiquidityInsideInitialX128 = secondsPerLiquidityInsideX128;
            stake.liquidityNoOverflow = uint96(liquidity);
        }

        emit TokenStaked(tokenId, incentiveId, liquidity);
    }
}

File 2 of 33 : IUniswapV3Staker.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;
pragma abicoder v2;

import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';

import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Factory.sol';
import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol';
import '@uniswap/v3-core/contracts/interfaces/IERC20Minimal.sol';

import '@uniswap/v3-periphery/contracts/interfaces/INonfungiblePositionManager.sol';
import '@uniswap/v3-periphery/contracts/interfaces/IMulticall.sol';

/// @title Uniswap V3 Staker Interface
/// @notice Allows staking nonfungible liquidity tokens in exchange for reward tokens
interface IUniswapV3Staker is IERC721Receiver, IMulticall {
    /// @param rewardToken The token being distributed as a reward
    /// @param pool The Uniswap V3 pool
    /// @param startTime The time when the incentive program begins
    /// @param endTime The time when rewards stop accruing
    /// @param refundee The address which receives any remaining reward tokens when the incentive is ended
    struct IncentiveKey {
        IERC20Minimal rewardToken;
        IUniswapV3Pool pool;
        uint256 startTime;
        uint256 endTime;
        address refundee;
    }

    /// @notice The Uniswap V3 Factory
    function factory() external view returns (IUniswapV3Factory);

    /// @notice The nonfungible position manager with which this staking contract is compatible
    function nonfungiblePositionManager() external view returns (INonfungiblePositionManager);

    /// @notice The max duration of an incentive in seconds
    function maxIncentiveDuration() external view returns (uint256);

    /// @notice The max amount of seconds into the future the incentive startTime can be set
    function maxIncentiveStartLeadTime() external view returns (uint256);

    /// @notice Represents a staking incentive
    /// @param incentiveId The ID of the incentive computed from its parameters
    /// @return totalRewardUnclaimed The amount of reward token not yet claimed by users
    /// @return totalSecondsClaimedX128 Total liquidity-seconds claimed, represented as a UQ32.128
    /// @return numberOfStakes The count of deposits that are currently staked for the incentive
    function incentives(bytes32 incentiveId)
        external
        view
        returns (
            uint256 totalRewardUnclaimed,
            uint160 totalSecondsClaimedX128,
            uint96 numberOfStakes
        );

    /// @notice Returns information about a deposited NFT
    /// @return owner The owner of the deposited NFT
    /// @return numberOfStakes Counter of how many incentives for which the liquidity is staked
    /// @return tickLower The lower tick of the range
    /// @return tickUpper The upper tick of the range
    function deposits(uint256 tokenId)
        external
        view
        returns (
            address owner,
            uint48 numberOfStakes,
            int24 tickLower,
            int24 tickUpper
        );

    /// @notice Returns information about a staked liquidity NFT
    /// @param tokenId The ID of the staked token
    /// @param incentiveId The ID of the incentive for which the token is staked
    /// @return secondsPerLiquidityInsideInitialX128 secondsPerLiquidity represented as a UQ32.128
    /// @return liquidity The amount of liquidity in the NFT as of the last time the rewards were computed
    function stakes(uint256 tokenId, bytes32 incentiveId)
        external
        view
        returns (uint160 secondsPerLiquidityInsideInitialX128, uint128 liquidity);

    /// @notice Returns amounts of reward tokens owed to a given address according to the last time all stakes were updated
    /// @param rewardToken The token for which to check rewards
    /// @param owner The owner for which the rewards owed are checked
    /// @return rewardsOwed The amount of the reward token claimable by the owner
    function rewards(IERC20Minimal rewardToken, address owner) external view returns (uint256 rewardsOwed);

    /// @notice Creates a new liquidity mining incentive program
    /// @param key Details of the incentive to create
    /// @param reward The amount of reward tokens to be distributed
    function createIncentive(IncentiveKey memory key, uint256 reward) external;

    /// @notice Ends an incentive after the incentive end time has passed and all stakes have been withdrawn
    /// @param key Details of the incentive to end
    /// @return refund The remaining reward tokens when the incentive is ended
    function endIncentive(IncentiveKey memory key) external returns (uint256 refund);

    /// @notice Transfers ownership of a deposit from the sender to the given recipient
    /// @param tokenId The ID of the token (and the deposit) to transfer
    /// @param to The new owner of the deposit
    function transferDeposit(uint256 tokenId, address to) external;

    /// @notice Withdraws a Uniswap V3 LP token `tokenId` from this contract to the recipient `to`
    /// @param tokenId The unique identifier of an Uniswap V3 LP token
    /// @param to The address where the LP token will be sent
    /// @param data An optional data array that will be passed along to the `to` address via the NFT safeTransferFrom
    function withdrawToken(
        uint256 tokenId,
        address to,
        bytes memory data
    ) external;

    /// @notice Stakes a Uniswap V3 LP token
    /// @param key The key of the incentive for which to stake the NFT
    /// @param tokenId The ID of the token to stake
    function stakeToken(IncentiveKey memory key, uint256 tokenId) external;

    /// @notice Unstakes a Uniswap V3 LP token
    /// @param key The key of the incentive for which to unstake the NFT
    /// @param tokenId The ID of the token to unstake
    function unstakeToken(IncentiveKey memory key, uint256 tokenId) external;

    /// @notice Transfers `amountRequested` of accrued `rewardToken` rewards from the contract to the recipient `to`
    /// @param rewardToken The token being distributed as a reward
    /// @param to The address where claimed rewards will be sent to
    /// @param amountRequested The amount of reward tokens to claim. Claims entire reward amount if set to 0.
    /// @return reward The amount of reward tokens claimed
    function claimReward(
        IERC20Minimal rewardToken,
        address to,
        uint256 amountRequested
    ) external returns (uint256 reward);

    /// @notice Calculates the reward amount that will be received for the given stake
    /// @param key The key of the incentive
    /// @param tokenId The ID of the token
    /// @return reward The reward accrued to the NFT for the given incentive thus far
    function getRewardInfo(IncentiveKey memory key, uint256 tokenId)
        external
        returns (uint256 reward, uint160 secondsInsideX128);

    /// @notice Event emitted when a liquidity mining incentive has been created
    /// @param rewardToken The token being distributed as a reward
    /// @param pool The Uniswap V3 pool
    /// @param startTime The time when the incentive program begins
    /// @param endTime The time when rewards stop accruing
    /// @param refundee The address which receives any remaining reward tokens after the end time
    /// @param reward The amount of reward tokens to be distributed
    event IncentiveCreated(
        IERC20Minimal indexed rewardToken,
        IUniswapV3Pool indexed pool,
        uint256 startTime,
        uint256 endTime,
        address refundee,
        uint256 reward
    );

    /// @notice Event that can be emitted when a liquidity mining incentive has ended
    /// @param incentiveId The incentive which is ending
    /// @param refund The amount of reward tokens refunded
    event IncentiveEnded(bytes32 indexed incentiveId, uint256 refund);

    /// @notice Emitted when ownership of a deposit changes
    /// @param tokenId The ID of the deposit (and token) that is being transferred
    /// @param oldOwner The owner before the deposit was transferred
    /// @param newOwner The owner after the deposit was transferred
    event DepositTransferred(uint256 indexed tokenId, address indexed oldOwner, address indexed newOwner);

    /// @notice Event emitted when a Uniswap V3 LP token has been staked
    /// @param tokenId The unique identifier of an Uniswap V3 LP token
    /// @param liquidity The amount of liquidity staked
    /// @param incentiveId The incentive in which the token is staking
    event TokenStaked(uint256 indexed tokenId, bytes32 indexed incentiveId, uint128 liquidity);

    /// @notice Event emitted when a Uniswap V3 LP token has been unstaked
    /// @param tokenId The unique identifier of an Uniswap V3 LP token
    /// @param incentiveId The incentive in which the token is staking
    event TokenUnstaked(uint256 indexed tokenId, bytes32 indexed incentiveId);

    /// @notice Event emitted when a reward token has been claimed
    /// @param to The address where claimed rewards were sent to
    /// @param reward The amount of reward tokens claimed
    event RewardClaimed(address indexed to, uint256 reward);
}

File 3 of 33 : IncentiveId.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;
pragma abicoder v2;

import '../interfaces/IUniswapV3Staker.sol';

library IncentiveId {
    /// @notice Calculate the key for a staking incentive
    /// @param key The components used to compute the incentive identifier
    /// @return incentiveId The identifier for the incentive
    function compute(IUniswapV3Staker.IncentiveKey memory key) internal pure returns (bytes32 incentiveId) {
        return keccak256(abi.encode(key));
    }
}

File 4 of 33 : RewardMath.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;

import '@uniswap/v3-core/contracts/libraries/FullMath.sol';
import '@openzeppelin/contracts/math/Math.sol';

/// @title Math for computing rewards
/// @notice Allows computing rewards given some parameters of stakes and incentives
library RewardMath {
    /// @notice Compute the amount of rewards owed given parameters of the incentive and stake
    /// @param totalRewardUnclaimed The total amount of unclaimed rewards left for an incentive
    /// @param totalSecondsClaimedX128 How many full liquidity-seconds have been already claimed for the incentive
    /// @param startTime When the incentive rewards began in epoch seconds
    /// @param endTime When rewards are no longer being dripped out in epoch seconds
    /// @param liquidity The amount of liquidity, assumed to be constant over the period over which the snapshots are measured
    /// @param secondsPerLiquidityInsideInitialX128 The seconds per liquidity of the liquidity tick range as of the beginning of the period
    /// @param secondsPerLiquidityInsideX128 The seconds per liquidity of the liquidity tick range as of the current block timestamp
    /// @param currentTime The current block timestamp, which must be greater than or equal to the start time
    /// @return reward The amount of rewards owed
    /// @return secondsInsideX128 The total liquidity seconds inside the position's range for the duration of the stake
    function computeRewardAmount(
        uint256 totalRewardUnclaimed,
        uint160 totalSecondsClaimedX128,
        uint256 startTime,
        uint256 endTime,
        uint128 liquidity,
        uint160 secondsPerLiquidityInsideInitialX128,
        uint160 secondsPerLiquidityInsideX128,
        uint256 currentTime
    ) internal pure returns (uint256 reward, uint160 secondsInsideX128) {
        // this should never be called before the start time
        assert(currentTime >= startTime);

        // this operation is safe, as the difference cannot be greater than 1/stake.liquidity
        secondsInsideX128 = (secondsPerLiquidityInsideX128 - secondsPerLiquidityInsideInitialX128) * liquidity;

        uint256 totalSecondsUnclaimedX128 =
            ((Math.max(endTime, currentTime) - startTime) << 128) - totalSecondsClaimedX128;

        reward = FullMath.mulDiv(totalRewardUnclaimed, secondsInsideX128, totalSecondsUnclaimedX128);
    }
}

File 5 of 33 : NFTPositionInfo.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;

import '@uniswap/v3-periphery/contracts/interfaces/INonfungiblePositionManager.sol';
import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Factory.sol';
import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol';

import '@uniswap/v3-periphery/contracts/libraries/PoolAddress.sol';

/// @notice Encapsulates the logic for getting info about a NFT token ID
library NFTPositionInfo {
    /// @param factory The address of the Uniswap V3 Factory used in computing the pool address
    /// @param nonfungiblePositionManager The address of the nonfungible position manager to query
    /// @param tokenId The unique identifier of an Uniswap V3 LP token
    /// @return pool The address of the Uniswap V3 pool
    /// @return tickLower The lower tick of the Uniswap V3 position
    /// @return tickUpper The upper tick of the Uniswap V3 position
    /// @return liquidity The amount of liquidity staked
    function getPositionInfo(
        IUniswapV3Factory factory,
        INonfungiblePositionManager nonfungiblePositionManager,
        uint256 tokenId
    )
        internal
        view
        returns (
            IUniswapV3Pool pool,
            int24 tickLower,
            int24 tickUpper,
            uint128 liquidity
        )
    {
        address token0;
        address token1;
        uint24 fee;
        (, , token0, token1, fee, tickLower, tickUpper, liquidity, , , , ) = nonfungiblePositionManager.positions(
            tokenId
        );

        pool = IUniswapV3Pool(
            PoolAddress.computeAddress(
                address(factory),
                PoolAddress.PoolKey({token0: token0, token1: token1, fee: fee})
            )
        );
    }
}

File 6 of 33 : TransferHelperExtended.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.6.0;

import '@uniswap/v3-periphery/contracts/libraries/TransferHelper.sol';
import '@openzeppelin/contracts/utils/Address.sol';

library TransferHelperExtended {
    using Address for address;

    /// @notice Transfers tokens from the targeted address to the given destination
    /// @notice Errors with 'STF' if transfer fails
    /// @param token The contract address of the token to be transferred
    /// @param from The originating address from which the tokens will be transferred
    /// @param to The destination address of the transfer
    /// @param value The amount to be transferred
    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        require(token.isContract(), 'TransferHelperExtended::safeTransferFrom: call to non-contract');
        TransferHelper.safeTransferFrom(token, from, to, value);
    }

    /// @notice Transfers tokens from msg.sender to a recipient
    /// @dev Errors with ST if transfer fails
    /// @param token The contract address of the token which will be transferred
    /// @param to The recipient of the transfer
    /// @param value The value of the transfer
    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        require(token.isContract(), 'TransferHelperExtended::safeTransfer: call to non-contract');
        TransferHelper.safeTransfer(token, to, value);
    }
}

File 7 of 33 : IUniswapV3Factory.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title The interface for the Uniswap V3 Factory
/// @notice The Uniswap V3 Factory facilitates creation of Uniswap V3 pools and control over the protocol fees
interface IUniswapV3Factory {
    /// @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);

    /// @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 fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
    /// @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,
        uint24 indexed fee,
        int24 tickSpacing,
        address pool
    );

    /// @notice Emitted when a new fee amount is enabled for pool creation via the factory
    /// @param fee The enabled fee, denominated in hundredths of a bip
    /// @param tickSpacing The minimum number of ticks between initialized ticks for pools created with the given fee
    event FeeAmountEnabled(uint24 indexed fee, int24 indexed tickSpacing);

    /// @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 tick spacing for a given fee amount, if enabled, or 0 if not enabled
    /// @dev A fee amount can never be removed, so this value should be hard coded or cached in the calling context
    /// @param fee The enabled fee, denominated in hundredths of a bip. Returns 0 in case of unenabled fee
    /// @return The tick spacing
    function feeAmountTickSpacing(uint24 fee) external view returns (int24);

    /// @notice Returns the pool address for a given pair of tokens and a fee, 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 fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
    /// @return pool The pool address
    function getPool(
        address tokenA,
        address tokenB,
        uint24 fee
    ) external view returns (address pool);

    /// @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 fee The desired fee for the pool
    /// @dev tokenA and tokenB may be passed in either order: token0/token1 or token1/token0. tickSpacing is retrieved
    /// from the fee. The call will revert if the pool already exists, the fee is invalid, or the token arguments
    /// are invalid.
    /// @return pool The address of the newly created pool
    function createPool(
        address tokenA,
        address tokenB,
        uint24 fee
    ) 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 Enables a fee amount with the given tickSpacing
    /// @dev Fee amounts may never be removed once enabled
    /// @param fee The fee amount to enable, denominated in hundredths of a bip (i.e. 1e-6)
    /// @param tickSpacing The spacing between ticks to be enforced for all pools created with the given fee amount
    function enableFeeAmount(uint24 fee, int24 tickSpacing) external;
}

File 8 of 33 : IUniswapV3Pool.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

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

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

}

File 9 of 33 : IERC20Minimal.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Minimal ERC20 interface for Uniswap
/// @notice Contains a subset of the full ERC20 interface that is used in Uniswap V3
interface IERC20Minimal {
    /// @notice Returns the balance of a token
    /// @param account The account for which to look up the number of tokens it has, i.e. its balance
    /// @return The number of tokens held by the account
    function balanceOf(address account) external view returns (uint256);

    /// @notice Transfers the amount of token from the `msg.sender` to the recipient
    /// @param recipient The account that will receive the amount transferred
    /// @param amount The number of tokens to send from the sender to the recipient
    /// @return Returns true for a successful transfer, false for an unsuccessful transfer
    function transfer(address recipient, uint256 amount) external returns (bool);

    /// @notice Returns the current allowance given to a spender by an owner
    /// @param owner The account of the token owner
    /// @param spender The account of the token spender
    /// @return The current allowance granted by `owner` to `spender`
    function allowance(address owner, address spender) external view returns (uint256);

    /// @notice Sets the allowance of a spender from the `msg.sender` to the value `amount`
    /// @param spender The account which will be allowed to spend a given amount of the owners tokens
    /// @param amount The amount of tokens allowed to be used by `spender`
    /// @return Returns true for a successful approval, false for unsuccessful
    function approve(address spender, uint256 amount) external returns (bool);

    /// @notice Transfers `amount` tokens from `sender` to `recipient` up to the allowance given to the `msg.sender`
    /// @param sender The account from which the transfer will be initiated
    /// @param recipient The recipient of the transfer
    /// @param amount The amount of the transfer
    /// @return Returns true for a successful transfer, false for unsuccessful
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /// @notice Event emitted when tokens are transferred from one address to another, either via `#transfer` or `#transferFrom`.
    /// @param from The account from which the tokens were sent, i.e. the balance decreased
    /// @param to The account to which the tokens were sent, i.e. the balance increased
    /// @param value The amount of tokens that were transferred
    event Transfer(address indexed from, address indexed to, uint256 value);

    /// @notice Event emitted when the approval amount for the spender of a given owner's tokens changes.
    /// @param owner The account that approved spending of its tokens
    /// @param spender The account for which the spending allowance was modified
    /// @param value The new allowance from the owner to the spender
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 10 of 33 : INonfungiblePositionManager.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;

import '@openzeppelin/contracts/token/ERC721/IERC721Metadata.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Enumerable.sol';

import './IPoolInitializer.sol';
import './IERC721Permit.sol';
import './IPeripheryPayments.sol';
import './IPeripheryImmutableState.sol';
import '../libraries/PoolAddress.sol';

/// @title Non-fungible token for positions
/// @notice Wraps Uniswap V3 positions in a non-fungible token interface which allows for them to be transferred
/// and authorized.
interface INonfungiblePositionManager is
    IPoolInitializer,
    IPeripheryPayments,
    IPeripheryImmutableState,
    IERC721Metadata,
    IERC721Enumerable,
    IERC721Permit
{
    /// @notice Emitted when liquidity is increased for a position NFT
    /// @dev Also emitted when a token is minted
    /// @param tokenId The ID of the token for which liquidity was increased
    /// @param liquidity The amount by which liquidity for the NFT position was increased
    /// @param amount0 The amount of token0 that was paid for the increase in liquidity
    /// @param amount1 The amount of token1 that was paid for the increase in liquidity
    event IncreaseLiquidity(uint256 indexed tokenId, uint128 liquidity, uint256 amount0, uint256 amount1);
    /// @notice Emitted when liquidity is decreased for a position NFT
    /// @param tokenId The ID of the token for which liquidity was decreased
    /// @param liquidity The amount by which liquidity for the NFT position was decreased
    /// @param amount0 The amount of token0 that was accounted for the decrease in liquidity
    /// @param amount1 The amount of token1 that was accounted for the decrease in liquidity
    event DecreaseLiquidity(uint256 indexed tokenId, uint128 liquidity, uint256 amount0, uint256 amount1);
    /// @notice Emitted when tokens are collected for a position NFT
    /// @dev The amounts reported may not be exactly equivalent to the amounts transferred, due to rounding behavior
    /// @param tokenId The ID of the token for which underlying tokens were collected
    /// @param recipient The address of the account that received the collected tokens
    /// @param amount0 The amount of token0 owed to the position that was collected
    /// @param amount1 The amount of token1 owed to the position that was collected
    event Collect(uint256 indexed tokenId, address recipient, uint256 amount0, uint256 amount1);

    /// @notice Returns the position information associated with a given token ID.
    /// @dev Throws if the token ID is not valid.
    /// @param tokenId The ID of the token that represents the position
    /// @return nonce The nonce for permits
    /// @return operator The address that is approved for spending
    /// @return token0 The address of the token0 for a specific pool
    /// @return token1 The address of the token1 for a specific pool
    /// @return fee The fee associated with the pool
    /// @return tickLower The lower end of the tick range for the position
    /// @return tickUpper The higher end of the tick range for the position
    /// @return liquidity The liquidity of the position
    /// @return feeGrowthInside0LastX128 The fee growth of token0 as of the last action on the individual position
    /// @return feeGrowthInside1LastX128 The fee growth of token1 as of the last action on the individual position
    /// @return tokensOwed0 The uncollected amount of token0 owed to the position as of the last computation
    /// @return tokensOwed1 The uncollected amount of token1 owed to the position as of the last computation
    function positions(uint256 tokenId)
        external
        view
        returns (
            uint96 nonce,
            address operator,
            address token0,
            address token1,
            uint24 fee,
            int24 tickLower,
            int24 tickUpper,
            uint128 liquidity,
            uint256 feeGrowthInside0LastX128,
            uint256 feeGrowthInside1LastX128,
            uint128 tokensOwed0,
            uint128 tokensOwed1
        );

    struct MintParams {
        address token0;
        address token1;
        uint24 fee;
        int24 tickLower;
        int24 tickUpper;
        uint256 amount0Desired;
        uint256 amount1Desired;
        uint256 amount0Min;
        uint256 amount1Min;
        address recipient;
        uint256 deadline;
    }

    /// @notice Creates a new position wrapped in a NFT
    /// @dev Call this when the pool does exist and is initialized. Note that if the pool is created but not initialized
    /// a method does not exist, i.e. the pool is assumed to be initialized.
    /// @param params The params necessary to mint a position, encoded as `MintParams` in calldata
    /// @return tokenId The ID of the token that represents the minted position
    /// @return liquidity The amount of liquidity for this position
    /// @return amount0 The amount of token0
    /// @return amount1 The amount of token1
    function mint(MintParams calldata params)
        external
        payable
        returns (
            uint256 tokenId,
            uint128 liquidity,
            uint256 amount0,
            uint256 amount1
        );

    struct IncreaseLiquidityParams {
        uint256 tokenId;
        uint256 amount0Desired;
        uint256 amount1Desired;
        uint256 amount0Min;
        uint256 amount1Min;
        uint256 deadline;
    }

    /// @notice Increases the amount of liquidity in a position, with tokens paid by the `msg.sender`
    /// @param params tokenId The ID of the token for which liquidity is being increased,
    /// amount0Desired The desired amount of token0 to be spent,
    /// amount1Desired The desired amount of token1 to be spent,
    /// amount0Min The minimum amount of token0 to spend, which serves as a slippage check,
    /// amount1Min The minimum amount of token1 to spend, which serves as a slippage check,
    /// deadline The time by which the transaction must be included to effect the change
    /// @return liquidity The new liquidity amount as a result of the increase
    /// @return amount0 The amount of token0 to acheive resulting liquidity
    /// @return amount1 The amount of token1 to acheive resulting liquidity
    function increaseLiquidity(IncreaseLiquidityParams calldata params)
        external
        payable
        returns (
            uint128 liquidity,
            uint256 amount0,
            uint256 amount1
        );

    struct DecreaseLiquidityParams {
        uint256 tokenId;
        uint128 liquidity;
        uint256 amount0Min;
        uint256 amount1Min;
        uint256 deadline;
    }

    /// @notice Decreases the amount of liquidity in a position and accounts it to the position
    /// @param params tokenId The ID of the token for which liquidity is being decreased,
    /// amount The amount by which liquidity will be decreased,
    /// amount0Min The minimum amount of token0 that should be accounted for the burned liquidity,
    /// amount1Min The minimum amount of token1 that should be accounted for the burned liquidity,
    /// deadline The time by which the transaction must be included to effect the change
    /// @return amount0 The amount of token0 accounted to the position's tokens owed
    /// @return amount1 The amount of token1 accounted to the position's tokens owed
    function decreaseLiquidity(DecreaseLiquidityParams calldata params)
        external
        payable
        returns (uint256 amount0, uint256 amount1);

    struct CollectParams {
        uint256 tokenId;
        address recipient;
        uint128 amount0Max;
        uint128 amount1Max;
    }

    /// @notice Collects up to a maximum amount of fees owed to a specific position to the recipient
    /// @param params tokenId The ID of the NFT for which tokens are being collected,
    /// recipient The account that should receive the tokens,
    /// amount0Max The maximum amount of token0 to collect,
    /// amount1Max The maximum amount of token1 to collect
    /// @return amount0 The amount of fees collected in token0
    /// @return amount1 The amount of fees collected in token1
    function collect(CollectParams calldata params) external payable returns (uint256 amount0, uint256 amount1);

    /// @notice Burns a token ID, which deletes it from the NFT contract. The token must have 0 liquidity and all tokens
    /// must be collected first.
    /// @param tokenId The ID of the token that is being burned
    function burn(uint256 tokenId) external payable;
}

File 11 of 33 : Multicall.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity =0.7.6;
pragma abicoder v2;

import '../interfaces/IMulticall.sol';

/// @title Multicall
/// @notice Enables calling multiple methods in a single call to the contract
abstract contract Multicall is IMulticall {
    /// @inheritdoc IMulticall
    function multicall(bytes[] calldata data) external payable override returns (bytes[] memory results) {
        results = new bytes[](data.length);
        for (uint256 i = 0; i < data.length; i++) {
            (bool success, bytes memory result) = address(this).delegatecall(data[i]);

            if (!success) {
                // Next 5 lines from https://ethereum.stackexchange.com/a/83577
                if (result.length < 68) revert();
                assembly {
                    result := add(result, 0x04)
                }
                revert(abi.decode(result, (string)));
            }

            results[i] = result;
        }
    }
}

File 12 of 33 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}

File 13 of 33 : IMulticall.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;

/// @title Multicall interface
/// @notice Enables calling multiple methods in a single call to the contract
interface IMulticall {
    /// @notice Call multiple functions in the current contract and return the data from all of them if they all succeed
    /// @dev The `msg.value` should not be trusted for any method callable from multicall.
    /// @param data The encoded function data for each of the calls to make to this contract
    /// @return results The results from each of the calls passed in via data
    function multicall(bytes[] calldata data) external payable returns (bytes[] memory results);
}

File 14 of 33 : IUniswapV3PoolImmutables.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

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

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

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

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

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

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

File 15 of 33 : IUniswapV3PoolState.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

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

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

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

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

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

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

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

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

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

File 16 of 33 : IUniswapV3PoolDerivedState.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

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

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

File 17 of 33 : IUniswapV3PoolActions.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

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

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

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

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

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

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

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

File 18 of 33 : IUniswapV3PoolOwnerActions.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

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

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

File 19 of 33 : IUniswapV3PoolEvents.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

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

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

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

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

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

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

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

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

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

File 20 of 33 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import "./IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {

    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

File 21 of 33 : IERC721Enumerable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import "./IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

File 22 of 33 : IPoolInitializer.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;

/// @title Creates and initializes V3 Pools
/// @notice Provides a method for creating and initializing a pool, if necessary, for bundling with other methods that
/// require the pool to exist.
interface IPoolInitializer {
    /// @notice Creates a new pool if it does not exist, then initializes if not initialized
    /// @dev This method can be bundled with others via IMulticall for the first action (e.g. mint) performed against a pool
    /// @param token0 The contract address of token0 of the pool
    /// @param token1 The contract address of token1 of the pool
    /// @param fee The fee amount of the v3 pool for the specified token pair
    /// @param sqrtPriceX96 The initial square root price of the pool as a Q64.96 value
    /// @return pool Returns the pool address based on the pair of tokens and fee, will return the newly created pool address if necessary
    function createAndInitializePoolIfNecessary(
        address token0,
        address token1,
        uint24 fee,
        uint160 sqrtPriceX96
    ) external payable returns (address pool);
}

File 23 of 33 : IERC721Permit.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;

import '@openzeppelin/contracts/token/ERC721/IERC721.sol';

/// @title ERC721 with permit
/// @notice Extension to ERC721 that includes a permit function for signature based approvals
interface IERC721Permit is IERC721 {
    /// @notice The permit typehash used in the permit signature
    /// @return The typehash for the permit
    function PERMIT_TYPEHASH() external pure returns (bytes32);

    /// @notice The domain separator used in the permit signature
    /// @return The domain seperator used in encoding of permit signature
    function DOMAIN_SEPARATOR() external view returns (bytes32);

    /// @notice Approve of a specific token ID for spending by spender via signature
    /// @param spender The account that is being approved
    /// @param tokenId The ID of the token that is being approved for spending
    /// @param deadline The deadline timestamp by which the call must be mined for the approve to work
    /// @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`
    /// @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`
    /// @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`
    function permit(
        address spender,
        uint256 tokenId,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external payable;
}

File 24 of 33 : IPeripheryPayments.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;

/// @title Periphery Payments
/// @notice Functions to ease deposits and withdrawals of ETH
interface IPeripheryPayments {
    /// @notice Unwraps the contract's WETH9 balance and sends it to recipient as ETH.
    /// @dev The amountMinimum parameter prevents malicious contracts from stealing WETH9 from users.
    /// @param amountMinimum The minimum amount of WETH9 to unwrap
    /// @param recipient The address receiving ETH
    function unwrapWETH9(uint256 amountMinimum, address recipient) external payable;

    /// @notice Refunds any ETH balance held by this contract to the `msg.sender`
    /// @dev Useful for bundling with mint or increase liquidity that uses ether, or exact output swaps
    /// that use ether for the input amount
    function refundETH() external payable;

    /// @notice Transfers the full amount of a token held by this contract to recipient
    /// @dev The amountMinimum parameter prevents malicious contracts from stealing the token from users
    /// @param token The contract address of the token which will be transferred to `recipient`
    /// @param amountMinimum The minimum amount of token required for a transfer
    /// @param recipient The destination address of the token
    function sweepToken(
        address token,
        uint256 amountMinimum,
        address recipient
    ) external payable;
}

File 25 of 33 : IPeripheryImmutableState.sol
// 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 Uniswap V3 factory
    function factory() external view returns (address);

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

File 26 of 33 : PoolAddress.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

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

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

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

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

File 27 of 33 : IERC721.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import "../../introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
      * @dev Safely transfers `tokenId` token from `from` to `to`.
      *
      * Requirements:
      *
      * - `from` cannot be the zero address.
      * - `to` cannot be the zero address.
      * - `tokenId` token must exist and be owned by `from`.
      * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
      * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
      *
      * Emits a {Transfer} event.
      */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

File 28 of 33 : IERC165.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

File 29 of 33 : FullMath.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.0;

/// @title Contains 512-bit math functions
/// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision
/// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits
library FullMath {
    /// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
    /// @param a The multiplicand
    /// @param b The multiplier
    /// @param denominator The divisor
    /// @return result The 256-bit result
    /// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
    function mulDiv(
        uint256 a,
        uint256 b,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        // 512-bit multiply [prod1 prod0] = a * b
        // Compute the product mod 2**256 and mod 2**256 - 1
        // then use the Chinese Remainder Theorem to reconstruct
        // the 512 bit result. The result is stored in two 256
        // variables such that product = prod1 * 2**256 + prod0
        uint256 prod0; // Least significant 256 bits of the product
        uint256 prod1; // Most significant 256 bits of the product
        assembly {
            let mm := mulmod(a, b, not(0))
            prod0 := mul(a, b)
            prod1 := sub(sub(mm, prod0), lt(mm, prod0))
        }

        // Handle non-overflow cases, 256 by 256 division
        if (prod1 == 0) {
            require(denominator > 0);
            assembly {
                result := div(prod0, denominator)
            }
            return result;
        }

        // Make sure the result is less than 2**256.
        // Also prevents denominator == 0
        require(denominator > prod1);

        ///////////////////////////////////////////////
        // 512 by 256 division.
        ///////////////////////////////////////////////

        // Make division exact by subtracting the remainder from [prod1 prod0]
        // Compute remainder using mulmod
        uint256 remainder;
        assembly {
            remainder := mulmod(a, b, denominator)
        }
        // Subtract 256 bit number from 512 bit number
        assembly {
            prod1 := sub(prod1, gt(remainder, prod0))
            prod0 := sub(prod0, remainder)
        }

        // Factor powers of two out of denominator
        // Compute largest power of two divisor of denominator.
        // Always >= 1.
        uint256 twos = -denominator & denominator;
        // Divide denominator by power of two
        assembly {
            denominator := div(denominator, twos)
        }

        // Divide [prod1 prod0] by the factors of two
        assembly {
            prod0 := div(prod0, twos)
        }
        // Shift in bits from prod1 into prod0. For this we need
        // to flip `twos` such that it is 2**256 / twos.
        // If twos is zero, then it becomes one
        assembly {
            twos := add(div(sub(0, twos), twos), 1)
        }
        prod0 |= prod1 * twos;

        // Invert denominator mod 2**256
        // Now that denominator is an odd number, it has an inverse
        // modulo 2**256 such that denominator * inv = 1 mod 2**256.
        // Compute the inverse by starting with a seed that is correct
        // correct for four bits. That is, denominator * inv = 1 mod 2**4
        uint256 inv = (3 * denominator) ^ 2;
        // Now use Newton-Raphson iteration to improve the precision.
        // Thanks to Hensel's lifting lemma, this also works in modular
        // arithmetic, doubling the correct bits in each step.
        inv *= 2 - denominator * inv; // inverse mod 2**8
        inv *= 2 - denominator * inv; // inverse mod 2**16
        inv *= 2 - denominator * inv; // inverse mod 2**32
        inv *= 2 - denominator * inv; // inverse mod 2**64
        inv *= 2 - denominator * inv; // inverse mod 2**128
        inv *= 2 - denominator * inv; // inverse mod 2**256

        // Because the division is now exact we can divide by multiplying
        // with the modular inverse of denominator. This will give us the
        // correct result modulo 2**256. Since the precoditions guarantee
        // that the outcome is less than 2**256, this is the final result.
        // We don't need to compute the high bits of the result and prod1
        // is no longer required.
        result = prod0 * inv;
        return result;
    }

    /// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
    /// @param a The multiplicand
    /// @param b The multiplier
    /// @param denominator The divisor
    /// @return result The 256-bit result
    function mulDivRoundingUp(
        uint256 a,
        uint256 b,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        result = mulDiv(a, b, denominator);
        if (mulmod(a, b, denominator) > 0) {
            require(result < type(uint256).max);
            result++;
        }
    }
}

File 30 of 33 : Math.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

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

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

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

File 31 of 33 : TransferHelper.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.6.0;

import '@openzeppelin/contracts/token/ERC20/IERC20.sol';

library TransferHelper {
    /// @notice Transfers tokens from the targeted address to the given destination
    /// @notice Errors with 'STF' if transfer fails
    /// @param token The contract address of the token to be transferred
    /// @param from The originating address from which the tokens will be transferred
    /// @param to The destination address of the transfer
    /// @param value The amount to be transferred
    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) =
            token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, from, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'STF');
    }

    /// @notice Transfers tokens from msg.sender to a recipient
    /// @dev Errors with ST if transfer fails
    /// @param token The contract address of the token which will be transferred
    /// @param to The recipient of the transfer
    /// @param value The value of the transfer
    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transfer.selector, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'ST');
    }

    /// @notice Approves the stipulated contract to spend the given allowance in the given token
    /// @dev Errors with 'SA' if transfer fails
    /// @param token The contract address of the token to be approved
    /// @param to The target of the approval
    /// @param value The amount of the given token the target will be allowed to spend
    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.approve.selector, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'SA');
    }

    /// @notice Transfers ETH to the recipient address
    /// @dev Fails with `STE`
    /// @param to The destination of the transfer
    /// @param value The value to be transferred
    function safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, 'STE');
    }
}

File 32 of 33 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 33 of 33 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "metadata": {
    "bytecodeHash": "none"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

[{"inputs":[{"internalType":"contract IUniswapV3Factory","name":"_factory","type":"address"},{"internalType":"contract INonfungiblePositionManager","name":"_nonfungiblePositionManager","type":"address"},{"internalType":"uint256","name":"_maxIncentiveStartLeadTime","type":"uint256"},{"internalType":"uint256","name":"_maxIncentiveDuration","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":true,"internalType":"address","name":"oldOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"DepositTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"contract IERC20Minimal","name":"rewardToken","type":"address"},{"indexed":true,"internalType":"contract IUniswapV3Pool","name":"pool","type":"address"},{"indexed":false,"internalType":"uint256","name":"startTime","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"endTime","type":"uint256"},{"indexed":false,"internalType":"address","name":"refundee","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"IncentiveCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"incentiveId","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"refund","type":"uint256"}],"name":"IncentiveEnded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardClaimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":true,"internalType":"bytes32","name":"incentiveId","type":"bytes32"},{"indexed":false,"internalType":"uint128","name":"liquidity","type":"uint128"}],"name":"TokenStaked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":true,"internalType":"bytes32","name":"incentiveId","type":"bytes32"}],"name":"TokenUnstaked","type":"event"},{"inputs":[{"internalType":"contract IERC20Minimal","name":"rewardToken","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amountRequested","type":"uint256"}],"name":"claimReward","outputs":[{"internalType":"uint256","name":"reward","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20Minimal","name":"rewardToken","type":"address"},{"internalType":"contract IUniswapV3Pool","name":"pool","type":"address"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"address","name":"refundee","type":"address"}],"internalType":"struct IUniswapV3Staker.IncentiveKey","name":"key","type":"tuple"},{"internalType":"uint256","name":"reward","type":"uint256"}],"name":"createIncentive","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"deposits","outputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint48","name":"numberOfStakes","type":"uint48"},{"internalType":"int24","name":"tickLower","type":"int24"},{"internalType":"int24","name":"tickUpper","type":"int24"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20Minimal","name":"rewardToken","type":"address"},{"internalType":"contract IUniswapV3Pool","name":"pool","type":"address"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"address","name":"refundee","type":"address"}],"internalType":"struct IUniswapV3Staker.IncentiveKey","name":"key","type":"tuple"}],"name":"endIncentive","outputs":[{"internalType":"uint256","name":"refund","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"contract IUniswapV3Factory","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20Minimal","name":"rewardToken","type":"address"},{"internalType":"contract IUniswapV3Pool","name":"pool","type":"address"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"address","name":"refundee","type":"address"}],"internalType":"struct IUniswapV3Staker.IncentiveKey","name":"key","type":"tuple"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getRewardInfo","outputs":[{"internalType":"uint256","name":"reward","type":"uint256"},{"internalType":"uint160","name":"secondsInsideX128","type":"uint160"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"incentives","outputs":[{"internalType":"uint256","name":"totalRewardUnclaimed","type":"uint256"},{"internalType":"uint160","name":"totalSecondsClaimedX128","type":"uint160"},{"internalType":"uint96","name":"numberOfStakes","type":"uint96"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxIncentiveDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxIncentiveStartLeadTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"nonfungiblePositionManager","outputs":[{"internalType":"contract INonfungiblePositionManager","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20Minimal","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"rewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20Minimal","name":"rewardToken","type":"address"},{"internalType":"contract IUniswapV3Pool","name":"pool","type":"address"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"address","name":"refundee","type":"address"}],"internalType":"struct IUniswapV3Staker.IncentiveKey","name":"key","type":"tuple"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"stakeToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes32","name":"incentiveId","type":"bytes32"}],"name":"stakes","outputs":[{"internalType":"uint160","name":"secondsPerLiquidityInsideInitialX128","type":"uint160"},{"internalType":"uint128","name":"liquidity","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"transferDeposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"contract IERC20Minimal","name":"rewardToken","type":"address"},{"internalType":"contract IUniswapV3Pool","name":"pool","type":"address"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"endTime","type":"uint256"},{"internalType":"address","name":"refundee","type":"address"}],"internalType":"struct IUniswapV3Staker.IncentiveKey","name":"key","type":"tuple"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"unstakeToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"withdrawToken","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000001f98431c8ad98523631ae4a59f267346ea31f984000000000000000000000000c36442b4a4522e871399cd717abdd847ab11fe880000000000000000000000000000000000000000000000000000000000278d000000000000000000000000000000000000000000000000000000000003c26700

-----Decoded View---------------
Arg [0] : _factory (address): 0x1F98431c8aD98523631AE4a59f267346ea31F984
Arg [1] : _nonfungiblePositionManager (address): 0xC36442b4a4522E871399CD717aBDD847Ab11FE88
Arg [2] : _maxIncentiveStartLeadTime (uint256): 2592000
Arg [3] : _maxIncentiveDuration (uint256): 63072000

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000001f98431c8ad98523631ae4a59f267346ea31f984
Arg [1] : 000000000000000000000000c36442b4a4522e871399cd717abdd847ab11fe88
Arg [2] : 0000000000000000000000000000000000000000000000000000000000278d00
Arg [3] : 0000000000000000000000000000000000000000000000000000000003c26700


Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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