Transaction Decoder

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
// Command implementations
import {Dispatcher} from './base/Dispatcher.sol';
import {RewardsCollector} from './base/RewardsCollector.sol';
import {RouterParameters, RouterImmutables} from './base/RouterImmutables.sol';
import {Commands} from './libraries/Commands.sol';
import {IUniversalRouter} from './interfaces/IUniversalRouter.sol';
contract UniversalRouter is RouterImmutables, IUniversalRouter, Dispatcher, RewardsCollector {
    modifier checkDeadline(uint256 deadline) {
        if (block.timestamp > deadline) revert TransactionDeadlinePassed();
        _;
    }
    constructor(RouterParameters memory params) RouterImmutables(params) {}
    /// @inheritdoc IUniversalRouter
    function execute(bytes calldata commands, bytes[] calldata inputs, uint256 deadline)
        external
        payable
        checkDeadline(deadline)
    {
        execute(commands, inputs);
    }
    /// @inheritdoc Dispatcher
    function execute(bytes calldata commands, bytes[] calldata inputs) public payable override isNotLocked {
        bool success;
        bytes memory output;
        uint256 numCommands = commands.length;
        if (inputs.length != numCommands) revert LengthMismatch();
        // loop through all given commands, execute them and pass along outputs as defined
        for (uint256 commandIndex = 0; commandIndex < numCommands;) {
            bytes1 command = commands[commandIndex];
            bytes calldata input = inputs[commandIndex];
            (success, output) = dispatch(command, input);
            if (!success && successRequired(command)) {
                revert ExecutionFailed({commandIndex: commandIndex, message: output});
            }
            unchecked {
                commandIndex++;
            }
        }
    }
    function successRequired(bytes1 command) internal pure returns (bool) {
        return command & Commands.FLAG_ALLOW_REVERT == 0;
    }
    /// @notice To receive ETH from WETH and NFT protocols
    receive() external payable {}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {V2SwapRouter} from '../modules/uniswap/v2/V2SwapRouter.sol';
import {V3SwapRouter} from '../modules/uniswap/v3/V3SwapRouter.sol';
import {BytesLib} from '../modules/uniswap/v3/BytesLib.sol';
import {Payments} from '../modules/Payments.sol';
import {RouterImmutables} from '../base/RouterImmutables.sol';
import {Callbacks} from '../base/Callbacks.sol';
import {Commands} from '../libraries/Commands.sol';
import {LockAndMsgSender} from './LockAndMsgSender.sol';
import {ERC721} from 'solmate/src/tokens/ERC721.sol';
import {ERC1155} from 'solmate/src/tokens/ERC1155.sol';
import {ERC20} from 'solmate/src/tokens/ERC20.sol';
import {IAllowanceTransfer} from 'permit2/src/interfaces/IAllowanceTransfer.sol';
import {ICryptoPunksMarket} from '../interfaces/external/ICryptoPunksMarket.sol';
/// @title Decodes and Executes Commands
/// @notice Called by the UniversalRouter contract to efficiently decode and execute a singular command
abstract contract Dispatcher is Payments, V2SwapRouter, V3SwapRouter, Callbacks, LockAndMsgSender {
    using BytesLib for bytes;
    error InvalidCommandType(uint256 commandType);
    error BuyPunkFailed();
    error InvalidOwnerERC721();
    error InvalidOwnerERC1155();
    error BalanceTooLow();
    /// @notice Decodes and executes the given command with the given inputs
    /// @param commandType The command type to execute
    /// @param inputs The inputs to execute the command with
    /// @dev 2 masks are used to enable use of a nested-if statement in execution for efficiency reasons
    /// @return success True on success of the command, false on failure
    /// @return output The outputs or error messages, if any, from the command
    function dispatch(bytes1 commandType, bytes calldata inputs) internal returns (bool success, bytes memory output) {
        uint256 command = uint8(commandType & Commands.COMMAND_TYPE_MASK);
        success = true;
        if (command < Commands.FOURTH_IF_BOUNDARY) {
            if (command < Commands.SECOND_IF_BOUNDARY) {
                // 0x00 <= command < 0x08
                if (command < Commands.FIRST_IF_BOUNDARY) {
                    if (command == Commands.V3_SWAP_EXACT_IN) {
                        // equivalent: abi.decode(inputs, (address, uint256, uint256, bytes, bool))
                        address recipient;
                        uint256 amountIn;
                        uint256 amountOutMin;
                        bool payerIsUser;
                        assembly {
                            recipient := calldataload(inputs.offset)
                            amountIn := calldataload(add(inputs.offset, 0x20))
                            amountOutMin := calldataload(add(inputs.offset, 0x40))
                            // 0x60 offset is the path, decoded below
                            payerIsUser := calldataload(add(inputs.offset, 0x80))
                        }
                        bytes calldata path = inputs.toBytes(3);
                        address payer = payerIsUser ? lockedBy : address(this);
                        v3SwapExactInput(map(recipient), amountIn, amountOutMin, path, payer);
                    } else if (command == Commands.V3_SWAP_EXACT_OUT) {
                        // equivalent: abi.decode(inputs, (address, uint256, uint256, bytes, bool))
                        address recipient;
                        uint256 amountOut;
                        uint256 amountInMax;
                        bool payerIsUser;
                        assembly {
                            recipient := calldataload(inputs.offset)
                            amountOut := calldataload(add(inputs.offset, 0x20))
                            amountInMax := calldataload(add(inputs.offset, 0x40))
                            // 0x60 offset is the path, decoded below
                            payerIsUser := calldataload(add(inputs.offset, 0x80))
                        }
                        bytes calldata path = inputs.toBytes(3);
                        address payer = payerIsUser ? lockedBy : address(this);
                        v3SwapExactOutput(map(recipient), amountOut, amountInMax, path, payer);
                    } else if (command == Commands.PERMIT2_TRANSFER_FROM) {
                        // equivalent: abi.decode(inputs, (address, address, uint160))
                        address token;
                        address recipient;
                        uint160 amount;
                        assembly {
                            token := calldataload(inputs.offset)
                            recipient := calldataload(add(inputs.offset, 0x20))
                            amount := calldataload(add(inputs.offset, 0x40))
                        }
                        permit2TransferFrom(token, lockedBy, map(recipient), amount);
                    } else if (command == Commands.PERMIT2_PERMIT_BATCH) {
                        (IAllowanceTransfer.PermitBatch memory permitBatch,) =
                            abi.decode(inputs, (IAllowanceTransfer.PermitBatch, bytes));
                        bytes calldata data = inputs.toBytes(1);
                        PERMIT2.permit(lockedBy, permitBatch, data);
                    } else if (command == Commands.SWEEP) {
                        // equivalent:  abi.decode(inputs, (address, address, uint256))
                        address token;
                        address recipient;
                        uint160 amountMin;
                        assembly {
                            token := calldataload(inputs.offset)
                            recipient := calldataload(add(inputs.offset, 0x20))
                            amountMin := calldataload(add(inputs.offset, 0x40))
                        }
                        Payments.sweep(token, map(recipient), amountMin);
                    } else if (command == Commands.TRANSFER) {
                        // equivalent:  abi.decode(inputs, (address, address, uint256))
                        address token;
                        address recipient;
                        uint256 value;
                        assembly {
                            token := calldataload(inputs.offset)
                            recipient := calldataload(add(inputs.offset, 0x20))
                            value := calldataload(add(inputs.offset, 0x40))
                        }
                        Payments.pay(token, map(recipient), value);
                    } else if (command == Commands.PAY_PORTION) {
                        // equivalent:  abi.decode(inputs, (address, address, uint256))
                        address token;
                        address recipient;
                        uint256 bips;
                        assembly {
                            token := calldataload(inputs.offset)
                            recipient := calldataload(add(inputs.offset, 0x20))
                            bips := calldataload(add(inputs.offset, 0x40))
                        }
                        Payments.payPortion(token, map(recipient), bips);
                    } else {
                        // placeholder area for command 0x07
                        revert InvalidCommandType(command);
                    }
                    // 0x08 <= command < 0x10
                } else {
                    if (command == Commands.V2_SWAP_EXACT_IN) {
                        // equivalent: abi.decode(inputs, (address, uint256, uint256, bytes, bool))
                        address recipient;
                        uint256 amountIn;
                        uint256 amountOutMin;
                        bool payerIsUser;
                        assembly {
                            recipient := calldataload(inputs.offset)
                            amountIn := calldataload(add(inputs.offset, 0x20))
                            amountOutMin := calldataload(add(inputs.offset, 0x40))
                            // 0x60 offset is the path, decoded below
                            payerIsUser := calldataload(add(inputs.offset, 0x80))
                        }
                        address[] calldata path = inputs.toAddressArray(3);
                        address payer = payerIsUser ? lockedBy : address(this);
                        v2SwapExactInput(map(recipient), amountIn, amountOutMin, path, payer);
                    } else if (command == Commands.V2_SWAP_EXACT_OUT) {
                        // equivalent: abi.decode(inputs, (address, uint256, uint256, bytes, bool))
                        address recipient;
                        uint256 amountOut;
                        uint256 amountInMax;
                        bool payerIsUser;
                        assembly {
                            recipient := calldataload(inputs.offset)
                            amountOut := calldataload(add(inputs.offset, 0x20))
                            amountInMax := calldataload(add(inputs.offset, 0x40))
                            // 0x60 offset is the path, decoded below
                            payerIsUser := calldataload(add(inputs.offset, 0x80))
                        }
                        address[] calldata path = inputs.toAddressArray(3);
                        address payer = payerIsUser ? lockedBy : address(this);
                        v2SwapExactOutput(map(recipient), amountOut, amountInMax, path, payer);
                    } else if (command == Commands.PERMIT2_PERMIT) {
                        // equivalent: abi.decode(inputs, (IAllowanceTransfer.PermitSingle, bytes))
                        IAllowanceTransfer.PermitSingle calldata permitSingle;
                        assembly {
                            permitSingle := inputs.offset
                        }
                        bytes calldata data = inputs.toBytes(6); // PermitSingle takes first 6 slots (0..5)
                        PERMIT2.permit(lockedBy, permitSingle, data);
                    } else if (command == Commands.WRAP_ETH) {
                        // equivalent: abi.decode(inputs, (address, uint256))
                        address recipient;
                        uint256 amountMin;
                        assembly {
                            recipient := calldataload(inputs.offset)
                            amountMin := calldataload(add(inputs.offset, 0x20))
                        }
                        Payments.wrapETH(map(recipient), amountMin);
                    } else if (command == Commands.UNWRAP_WETH) {
                        // equivalent: abi.decode(inputs, (address, uint256))
                        address recipient;
                        uint256 amountMin;
                        assembly {
                            recipient := calldataload(inputs.offset)
                            amountMin := calldataload(add(inputs.offset, 0x20))
                        }
                        Payments.unwrapWETH9(map(recipient), amountMin);
                    } else if (command == Commands.PERMIT2_TRANSFER_FROM_BATCH) {
                        (IAllowanceTransfer.AllowanceTransferDetails[] memory batchDetails) =
                            abi.decode(inputs, (IAllowanceTransfer.AllowanceTransferDetails[]));
                        permit2TransferFrom(batchDetails, lockedBy);
                    } else if (command == Commands.BALANCE_CHECK_ERC20) {
                        // equivalent: abi.decode(inputs, (address, address, uint256))
                        address owner;
                        address token;
                        uint256 minBalance;
                        assembly {
                            owner := calldataload(inputs.offset)
                            token := calldataload(add(inputs.offset, 0x20))
                            minBalance := calldataload(add(inputs.offset, 0x40))
                        }
                        success = (ERC20(token).balanceOf(owner) >= minBalance);
                        if (!success) output = abi.encodePacked(BalanceTooLow.selector);
                    } else {
                        // placeholder area for command 0x0f
                        revert InvalidCommandType(command);
                    }
                }
                // 0x10 <= command
            } else {
                // 0x10 <= command < 0x18
                if (command < Commands.THIRD_IF_BOUNDARY) {
                    if (command == Commands.SEAPORT_V1_5) {
                        /// @dev Seaport 1.4 and 1.5 allow for orders to be created by contracts.
                        ///     These orders pass control to the contract offerers during fufillment,
                        ///         allowing them to perform any number of destructive actions as a holder of the NFT.
                        ///     Integrators should be aware that in some scenarios: e.g. purchasing an NFT that allows the holder
                        ///         to claim another NFT, the contract offerer can "steal" the claim during order fufillment.
                        ///     For some such purchases, an OWNER_CHECK command can be prepended to ensure that all tokens have the desired owner at the end of the transaction.
                        ///     This is also outlined in the Seaport documentation: https://github.com/ProjectOpenSea/seaport/blob/main/docs/SeaportDocumentation.md
                        (uint256 value, bytes calldata data) = getValueAndData(inputs);
                        (success, output) = SEAPORT_V1_5.call{value: value}(data);
                    } else if (command == Commands.LOOKS_RARE_V2) {
                        // equivalent: abi.decode(inputs, (uint256, bytes))
                        uint256 value;
                        assembly {
                            value := calldataload(inputs.offset)
                        }
                        bytes calldata data = inputs.toBytes(1);
                        (success, output) = LOOKS_RARE_V2.call{value: value}(data);
                    } else if (command == Commands.NFTX) {
                        // equivalent: abi.decode(inputs, (uint256, bytes))
                        (uint256 value, bytes calldata data) = getValueAndData(inputs);
                        (success, output) = NFTX_ZAP.call{value: value}(data);
                    } else if (command == Commands.CRYPTOPUNKS) {
                        // equivalent: abi.decode(inputs, (uint256, address, uint256))
                        uint256 punkId;
                        address recipient;
                        uint256 value;
                        assembly {
                            punkId := calldataload(inputs.offset)
                            recipient := calldataload(add(inputs.offset, 0x20))
                            value := calldataload(add(inputs.offset, 0x40))
                        }
                        (success, output) = CRYPTOPUNKS.call{value: value}(
                            abi.encodeWithSelector(ICryptoPunksMarket.buyPunk.selector, punkId)
                        );
                        if (success) ICryptoPunksMarket(CRYPTOPUNKS).transferPunk(map(recipient), punkId);
                        else output = abi.encodePacked(BuyPunkFailed.selector);
                    } else if (command == Commands.OWNER_CHECK_721) {
                        // equivalent: abi.decode(inputs, (address, address, uint256))
                        address owner;
                        address token;
                        uint256 id;
                        assembly {
                            owner := calldataload(inputs.offset)
                            token := calldataload(add(inputs.offset, 0x20))
                            id := calldataload(add(inputs.offset, 0x40))
                        }
                        success = (ERC721(token).ownerOf(id) == owner);
                        if (!success) output = abi.encodePacked(InvalidOwnerERC721.selector);
                    } else if (command == Commands.OWNER_CHECK_1155) {
                        // equivalent: abi.decode(inputs, (address, address, uint256, uint256))
                        address owner;
                        address token;
                        uint256 id;
                        uint256 minBalance;
                        assembly {
                            owner := calldataload(inputs.offset)
                            token := calldataload(add(inputs.offset, 0x20))
                            id := calldataload(add(inputs.offset, 0x40))
                            minBalance := calldataload(add(inputs.offset, 0x60))
                        }
                        success = (ERC1155(token).balanceOf(owner, id) >= minBalance);
                        if (!success) output = abi.encodePacked(InvalidOwnerERC1155.selector);
                    } else if (command == Commands.SWEEP_ERC721) {
                        // equivalent: abi.decode(inputs, (address, address, uint256))
                        address token;
                        address recipient;
                        uint256 id;
                        assembly {
                            token := calldataload(inputs.offset)
                            recipient := calldataload(add(inputs.offset, 0x20))
                            id := calldataload(add(inputs.offset, 0x40))
                        }
                        Payments.sweepERC721(token, map(recipient), id);
                    }
                    // 0x18 <= command < 0x1f
                } else {
                    if (command == Commands.X2Y2_721) {
                        (success, output) = callAndTransfer721(inputs, X2Y2);
                    } else if (command == Commands.SUDOSWAP) {
                        // equivalent: abi.decode(inputs, (uint256, bytes))
                        (uint256 value, bytes calldata data) = getValueAndData(inputs);
                        (success, output) = SUDOSWAP.call{value: value}(data);
                    } else if (command == Commands.NFT20) {
                        // equivalent: abi.decode(inputs, (uint256, bytes))
                        (uint256 value, bytes calldata data) = getValueAndData(inputs);
                        (success, output) = NFT20_ZAP.call{value: value}(data);
                    } else if (command == Commands.X2Y2_1155) {
                        (success, output) = callAndTransfer1155(inputs, X2Y2);
                    } else if (command == Commands.FOUNDATION) {
                        (success, output) = callAndTransfer721(inputs, FOUNDATION);
                    } else if (command == Commands.SWEEP_ERC1155) {
                        // equivalent: abi.decode(inputs, (address, address, uint256, uint256))
                        address token;
                        address recipient;
                        uint256 id;
                        uint256 amount;
                        assembly {
                            token := calldataload(inputs.offset)
                            recipient := calldataload(add(inputs.offset, 0x20))
                            id := calldataload(add(inputs.offset, 0x40))
                            amount := calldataload(add(inputs.offset, 0x60))
                        }
                        Payments.sweepERC1155(token, map(recipient), id, amount);
                    } else if (command == Commands.ELEMENT_MARKET) {
                        // equivalent: abi.decode(inputs, (uint256, bytes))
                        (uint256 value, bytes calldata data) = getValueAndData(inputs);
                        (success, output) = ELEMENT_MARKET.call{value: value}(data);
                    } else {
                        // placeholder for command 0x1f
                        revert InvalidCommandType(command);
                    }
                }
            }
            // 0x20 <= command
        } else {
            if (command == Commands.SEAPORT_V1_4) {
                /// @dev Seaport 1.4 and 1.5 allow for orders to be created by contracts.
                ///     These orders pass control to the contract offerers during fufillment,
                ///         allowing them to perform any number of destructive actions as a holder of the NFT.
                ///     Integrators should be aware that in some scenarios: e.g. purchasing an NFT that allows the holder
                ///         to claim another NFT, the contract offerer can "steal" the claim during order fufillment.
                ///     For some such purchases, an OWNER_CHECK command can be prepended to ensure that all tokens have the desired owner at the end of the transaction.
                ///     This is also outlined in the Seaport documentation: https://github.com/ProjectOpenSea/seaport/blob/main/docs/SeaportDocumentation.md
                (uint256 value, bytes calldata data) = getValueAndData(inputs);
                (success, output) = SEAPORT_V1_4.call{value: value}(data);
            } else if (command == Commands.EXECUTE_SUB_PLAN) {
                bytes calldata _commands = inputs.toBytes(0);
                bytes[] calldata _inputs = inputs.toBytesArray(1);
                (success, output) =
                    (address(this)).call(abi.encodeWithSelector(Dispatcher.execute.selector, _commands, _inputs));
            } else if (command == Commands.APPROVE_ERC20) {
                ERC20 token;
                RouterImmutables.Spenders spender;
                assembly {
                    token := calldataload(inputs.offset)
                    spender := calldataload(add(inputs.offset, 0x20))
                }
                Payments.approveERC20(token, spender);
            } else {
                // placeholder area for commands 0x22-0x3f
                revert InvalidCommandType(command);
            }
        }
    }
    /// @notice Executes encoded commands along with provided inputs.
    /// @param commands A set of concatenated commands, each 1 byte in length
    /// @param inputs An array of byte strings containing abi encoded inputs for each command
    function execute(bytes calldata commands, bytes[] calldata inputs) external payable virtual;
    /// @notice Performs a call to purchase an ERC721, then transfers the ERC721 to a specified recipient
    /// @param inputs The inputs for the protocol and ERC721 transfer, encoded
    /// @param protocol The protocol to pass the calldata to
    /// @return success True on success of the command, false on failure
    /// @return output The outputs or error messages, if any, from the command
    function callAndTransfer721(bytes calldata inputs, address protocol)
        internal
        returns (bool success, bytes memory output)
    {
        // equivalent: abi.decode(inputs, (uint256, bytes, address, address, uint256))
        (uint256 value, bytes calldata data) = getValueAndData(inputs);
        address recipient;
        address token;
        uint256 id;
        assembly {
            // 0x00 and 0x20 offsets are value and data, above
            recipient := calldataload(add(inputs.offset, 0x40))
            token := calldataload(add(inputs.offset, 0x60))
            id := calldataload(add(inputs.offset, 0x80))
        }
        (success, output) = protocol.call{value: value}(data);
        if (success) ERC721(token).safeTransferFrom(address(this), map(recipient), id);
    }
    /// @notice Performs a call to purchase an ERC1155, then transfers the ERC1155 to a specified recipient
    /// @param inputs The inputs for the protocol and ERC1155 transfer, encoded
    /// @param protocol The protocol to pass the calldata to
    /// @return success True on success of the command, false on failure
    /// @return output The outputs or error messages, if any, from the command
    function callAndTransfer1155(bytes calldata inputs, address protocol)
        internal
        returns (bool success, bytes memory output)
    {
        // equivalent: abi.decode(inputs, (uint256, bytes, address, address, uint256, uint256))
        (uint256 value, bytes calldata data) = getValueAndData(inputs);
        address recipient;
        address token;
        uint256 id;
        uint256 amount;
        assembly {
            // 0x00 and 0x20 offsets are value and data, above
            recipient := calldataload(add(inputs.offset, 0x40))
            token := calldataload(add(inputs.offset, 0x60))
            id := calldataload(add(inputs.offset, 0x80))
            amount := calldataload(add(inputs.offset, 0xa0))
        }
        (success, output) = protocol.call{value: value}(data);
        if (success) ERC1155(token).safeTransferFrom(address(this), map(recipient), id, amount, new bytes(0));
    }
    /// @notice Helper function to extract `value` and `data` parameters from input bytes string
    /// @dev The helper assumes that `value` is the first parameter, and `data` is the second
    /// @param inputs The bytes string beginning with value and data parameters
    /// @return value The 256 bit integer value
    /// @return data The data bytes string
    function getValueAndData(bytes calldata inputs) internal pure returns (uint256 value, bytes calldata data) {
        assembly {
            value := calldataload(inputs.offset)
        }
        data = inputs.toBytes(1);
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.15;
import {ERC20} from 'solmate/src/tokens/ERC20.sol';
import {SafeTransferLib} from 'solmate/src/utils/SafeTransferLib.sol';
import {RouterImmutables} from './RouterImmutables.sol';
import {IRewardsCollector} from '../interfaces/IRewardsCollector.sol';
abstract contract RewardsCollector is IRewardsCollector, RouterImmutables {
    using SafeTransferLib for ERC20;
    event RewardsSent(uint256 amount);
    error UnableToClaim();
    /// @inheritdoc IRewardsCollector
    function collectRewards(bytes calldata looksRareClaim) external {
        (bool success,) = LOOKS_RARE_REWARDS_DISTRIBUTOR.call(looksRareClaim);
        if (!success) revert UnableToClaim();
        uint256 balance = LOOKS_RARE_TOKEN.balanceOf(address(this));
        LOOKS_RARE_TOKEN.transfer(ROUTER_REWARDS_DISTRIBUTOR, balance);
        emit RewardsSent(balance);
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {IAllowanceTransfer} from 'permit2/src/interfaces/IAllowanceTransfer.sol';
import {ERC20} from 'solmate/src/tokens/ERC20.sol';
import {IWETH9} from '../interfaces/external/IWETH9.sol';
struct RouterParameters {
    address permit2;
    address weth9;
    address seaportV1_5;
    address seaportV1_4;
    address openseaConduit;
    address nftxZap;
    address x2y2;
    address foundation;
    address sudoswap;
    address elementMarket;
    address nft20Zap;
    address cryptopunks;
    address looksRareV2;
    address routerRewardsDistributor;
    address looksRareRewardsDistributor;
    address looksRareToken;
    address v2Factory;
    address v3Factory;
    bytes32 pairInitCodeHash;
    bytes32 poolInitCodeHash;
}
/// @title Router Immutable Storage contract
/// @notice Used along with the `RouterParameters` struct for ease of cross-chain deployment
contract RouterImmutables {
    /// @dev WETH9 address
    IWETH9 internal immutable WETH9;
    /// @dev Permit2 address
    IAllowanceTransfer internal immutable PERMIT2;
    /// @dev Seaport 1.5 address
    address internal immutable SEAPORT_V1_5;
    /// @dev Seaport 1.4 address
    address internal immutable SEAPORT_V1_4;
    /// @dev The address of OpenSea's conduit used in both Seaport 1.4 and Seaport 1.5
    address internal immutable OPENSEA_CONDUIT;
    /// @dev The address of NFTX zap contract for interfacing with vaults
    address internal immutable NFTX_ZAP;
    /// @dev The address of X2Y2
    address internal immutable X2Y2;
    // @dev The address of Foundation
    address internal immutable FOUNDATION;
    // @dev The address of Sudoswap's router
    address internal immutable SUDOSWAP;
    // @dev The address of Element Market
    address internal immutable ELEMENT_MARKET;
    // @dev the address of NFT20's zap contract
    address internal immutable NFT20_ZAP;
    // @dev the address of Larva Lab's cryptopunks marketplace
    address internal immutable CRYPTOPUNKS;
    /// @dev The address of LooksRareV2
    address internal immutable LOOKS_RARE_V2;
    /// @dev The address of LooksRare token
    ERC20 internal immutable LOOKS_RARE_TOKEN;
    /// @dev The address of LooksRare rewards distributor
    address internal immutable LOOKS_RARE_REWARDS_DISTRIBUTOR;
    /// @dev The address of router rewards distributor
    address internal immutable ROUTER_REWARDS_DISTRIBUTOR;
    /// @dev The address of UniswapV2Factory
    address internal immutable UNISWAP_V2_FACTORY;
    /// @dev The UniswapV2Pair initcodehash
    bytes32 internal immutable UNISWAP_V2_PAIR_INIT_CODE_HASH;
    /// @dev The address of UniswapV3Factory
    address internal immutable UNISWAP_V3_FACTORY;
    /// @dev The UniswapV3Pool initcodehash
    bytes32 internal immutable UNISWAP_V3_POOL_INIT_CODE_HASH;
    enum Spenders {
        OSConduit,
        Sudoswap
    }
    constructor(RouterParameters memory params) {
        PERMIT2 = IAllowanceTransfer(params.permit2);
        WETH9 = IWETH9(params.weth9);
        SEAPORT_V1_5 = params.seaportV1_5;
        SEAPORT_V1_4 = params.seaportV1_4;
        OPENSEA_CONDUIT = params.openseaConduit;
        NFTX_ZAP = params.nftxZap;
        X2Y2 = params.x2y2;
        FOUNDATION = params.foundation;
        SUDOSWAP = params.sudoswap;
        ELEMENT_MARKET = params.elementMarket;
        NFT20_ZAP = params.nft20Zap;
        CRYPTOPUNKS = params.cryptopunks;
        LOOKS_RARE_V2 = params.looksRareV2;
        LOOKS_RARE_TOKEN = ERC20(params.looksRareToken);
        LOOKS_RARE_REWARDS_DISTRIBUTOR = params.looksRareRewardsDistributor;
        ROUTER_REWARDS_DISTRIBUTOR = params.routerRewardsDistributor;
        UNISWAP_V2_FACTORY = params.v2Factory;
        UNISWAP_V2_PAIR_INIT_CODE_HASH = params.pairInitCodeHash;
        UNISWAP_V3_FACTORY = params.v3Factory;
        UNISWAP_V3_POOL_INIT_CODE_HASH = params.poolInitCodeHash;
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
/// @title Commands
/// @notice Command Flags used to decode commands
library Commands {
    // Masks to extract certain bits of commands
    bytes1 internal constant FLAG_ALLOW_REVERT = 0x80;
    bytes1 internal constant COMMAND_TYPE_MASK = 0x3f;
    // Command Types. Maximum supported command at this moment is 0x3f.
    // Command Types where value<0x08, executed in the first nested-if block
    uint256 constant V3_SWAP_EXACT_IN = 0x00;
    uint256 constant V3_SWAP_EXACT_OUT = 0x01;
    uint256 constant PERMIT2_TRANSFER_FROM = 0x02;
    uint256 constant PERMIT2_PERMIT_BATCH = 0x03;
    uint256 constant SWEEP = 0x04;
    uint256 constant TRANSFER = 0x05;
    uint256 constant PAY_PORTION = 0x06;
    // COMMAND_PLACEHOLDER = 0x07;
    // The commands are executed in nested if blocks to minimise gas consumption
    // The following constant defines one of the boundaries where the if blocks split commands
    uint256 constant FIRST_IF_BOUNDARY = 0x08;
    // Command Types where 0x08<=value<=0x0f, executed in the second nested-if block
    uint256 constant V2_SWAP_EXACT_IN = 0x08;
    uint256 constant V2_SWAP_EXACT_OUT = 0x09;
    uint256 constant PERMIT2_PERMIT = 0x0a;
    uint256 constant WRAP_ETH = 0x0b;
    uint256 constant UNWRAP_WETH = 0x0c;
    uint256 constant PERMIT2_TRANSFER_FROM_BATCH = 0x0d;
    uint256 constant BALANCE_CHECK_ERC20 = 0x0e;
    // COMMAND_PLACEHOLDER = 0x0f;
    // The commands are executed in nested if blocks to minimise gas consumption
    // The following constant defines one of the boundaries where the if blocks split commands
    uint256 constant SECOND_IF_BOUNDARY = 0x10;
    // Command Types where 0x10<=value<0x18, executed in the third nested-if block
    uint256 constant SEAPORT_V1_5 = 0x10;
    uint256 constant LOOKS_RARE_V2 = 0x11;
    uint256 constant NFTX = 0x12;
    uint256 constant CRYPTOPUNKS = 0x13;
    // 0x14;
    uint256 constant OWNER_CHECK_721 = 0x15;
    uint256 constant OWNER_CHECK_1155 = 0x16;
    uint256 constant SWEEP_ERC721 = 0x17;
    // The commands are executed in nested if blocks to minimise gas consumption
    // The following constant defines one of the boundaries where the if blocks split commands
    uint256 constant THIRD_IF_BOUNDARY = 0x18;
    // Command Types where 0x18<=value<=0x1f, executed in the final nested-if block
    uint256 constant X2Y2_721 = 0x18;
    uint256 constant SUDOSWAP = 0x19;
    uint256 constant NFT20 = 0x1a;
    uint256 constant X2Y2_1155 = 0x1b;
    uint256 constant FOUNDATION = 0x1c;
    uint256 constant SWEEP_ERC1155 = 0x1d;
    uint256 constant ELEMENT_MARKET = 0x1e;
    // COMMAND_PLACEHOLDER = 0x1f;
    // The commands are executed in nested if blocks to minimise gas consumption
    // The following constant defines one of the boundaries where the if blocks split commands
    uint256 constant FOURTH_IF_BOUNDARY = 0x20;
    // Command Types where 0x20<=value
    uint256 constant SEAPORT_V1_4 = 0x20;
    uint256 constant EXECUTE_SUB_PLAN = 0x21;
    uint256 constant APPROVE_ERC20 = 0x22;
    // COMMAND_PLACEHOLDER for 0x23 to 0x3f (all unused)
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {IERC721Receiver} from '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import {IERC1155Receiver} from '@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol';
import {IRewardsCollector} from './IRewardsCollector.sol';
interface IUniversalRouter is IRewardsCollector, IERC721Receiver, IERC1155Receiver {
    /// @notice Thrown when a required command has failed
    error ExecutionFailed(uint256 commandIndex, bytes message);
    /// @notice Thrown when attempting to send ETH directly to the contract
    error ETHNotAccepted();
    /// @notice Thrown when executing commands with an expired deadline
    error TransactionDeadlinePassed();
    /// @notice Thrown when attempting to execute commands and an incorrect number of inputs are provided
    error LengthMismatch();
    /// @notice Executes encoded commands along with provided inputs. Reverts if deadline has expired.
    /// @param commands A set of concatenated commands, each 1 byte in length
    /// @param inputs An array of byte strings containing abi encoded inputs for each command
    /// @param deadline The deadline by which the transaction must be executed
    function execute(bytes calldata commands, bytes[] calldata inputs, uint256 deadline) external payable;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {IUniswapV2Pair} from '@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol';
import {UniswapV2Library} from './UniswapV2Library.sol';
import {RouterImmutables} from '../../../base/RouterImmutables.sol';
import {Payments} from '../../Payments.sol';
import {Permit2Payments} from '../../Permit2Payments.sol';
import {Constants} from '../../../libraries/Constants.sol';
import {ERC20} from 'solmate/src/tokens/ERC20.sol';
/// @title Router for Uniswap v2 Trades
abstract contract V2SwapRouter is RouterImmutables, Permit2Payments {
    error V2TooLittleReceived();
    error V2TooMuchRequested();
    error V2InvalidPath();
    function _v2Swap(address[] calldata path, address recipient, address pair) private {
        unchecked {
            if (path.length < 2) revert V2InvalidPath();
            // cached to save on duplicate operations
            (address token0,) = UniswapV2Library.sortTokens(path[0], path[1]);
            uint256 finalPairIndex = path.length - 1;
            uint256 penultimatePairIndex = finalPairIndex - 1;
            for (uint256 i; i < finalPairIndex; i++) {
                (address input, address output) = (path[i], path[i + 1]);
                (uint256 reserve0, uint256 reserve1,) = IUniswapV2Pair(pair).getReserves();
                (uint256 reserveInput, uint256 reserveOutput) =
                    input == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
                uint256 amountInput = ERC20(input).balanceOf(pair) - reserveInput;
                uint256 amountOutput = UniswapV2Library.getAmountOut(amountInput, reserveInput, reserveOutput);
                (uint256 amount0Out, uint256 amount1Out) =
                    input == token0 ? (uint256(0), amountOutput) : (amountOutput, uint256(0));
                address nextPair;
                (nextPair, token0) = i < penultimatePairIndex
                    ? UniswapV2Library.pairAndToken0For(
                        UNISWAP_V2_FACTORY, UNISWAP_V2_PAIR_INIT_CODE_HASH, output, path[i + 2]
                    )
                    : (recipient, address(0));
                IUniswapV2Pair(pair).swap(amount0Out, amount1Out, nextPair, new bytes(0));
                pair = nextPair;
            }
        }
    }
    /// @notice Performs a Uniswap v2 exact input swap
    /// @param recipient The recipient of the output tokens
    /// @param amountIn The amount of input tokens for the trade
    /// @param amountOutMinimum The minimum desired amount of output tokens
    /// @param path The path of the trade as an array of token addresses
    /// @param payer The address that will be paying the input
    function v2SwapExactInput(
        address recipient,
        uint256 amountIn,
        uint256 amountOutMinimum,
        address[] calldata path,
        address payer
    ) internal {
        address firstPair =
            UniswapV2Library.pairFor(UNISWAP_V2_FACTORY, UNISWAP_V2_PAIR_INIT_CODE_HASH, path[0], path[1]);
        if (
            amountIn != Constants.ALREADY_PAID // amountIn of 0 to signal that the pair already has the tokens
        ) {
            payOrPermit2Transfer(path[0], payer, firstPair, amountIn);
        }
        ERC20 tokenOut = ERC20(path[path.length - 1]);
        uint256 balanceBefore = tokenOut.balanceOf(recipient);
        _v2Swap(path, recipient, firstPair);
        uint256 amountOut = tokenOut.balanceOf(recipient) - balanceBefore;
        if (amountOut < amountOutMinimum) revert V2TooLittleReceived();
    }
    /// @notice Performs a Uniswap v2 exact output swap
    /// @param recipient The recipient of the output tokens
    /// @param amountOut The amount of output tokens to receive for the trade
    /// @param amountInMaximum The maximum desired amount of input tokens
    /// @param path The path of the trade as an array of token addresses
    /// @param payer The address that will be paying the input
    function v2SwapExactOutput(
        address recipient,
        uint256 amountOut,
        uint256 amountInMaximum,
        address[] calldata path,
        address payer
    ) internal {
        (uint256 amountIn, address firstPair) =
            UniswapV2Library.getAmountInMultihop(UNISWAP_V2_FACTORY, UNISWAP_V2_PAIR_INIT_CODE_HASH, amountOut, path);
        if (amountIn > amountInMaximum) revert V2TooMuchRequested();
        payOrPermit2Transfer(path[0], payer, firstPair, amountIn);
        _v2Swap(path, recipient, firstPair);
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {V3Path} from './V3Path.sol';
import {BytesLib} from './BytesLib.sol';
import {SafeCast} from '@uniswap/v3-core/contracts/libraries/SafeCast.sol';
import {IUniswapV3Pool} from '@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol';
import {IUniswapV3SwapCallback} from '@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol';
import {Constants} from '../../../libraries/Constants.sol';
import {RouterImmutables} from '../../../base/RouterImmutables.sol';
import {Permit2Payments} from '../../Permit2Payments.sol';
import {Constants} from '../../../libraries/Constants.sol';
import {ERC20} from 'solmate/src/tokens/ERC20.sol';
/// @title Router for Uniswap v3 Trades
abstract contract V3SwapRouter is RouterImmutables, Permit2Payments, IUniswapV3SwapCallback {
    using V3Path for bytes;
    using BytesLib for bytes;
    using SafeCast for uint256;
    error V3InvalidSwap();
    error V3TooLittleReceived();
    error V3TooMuchRequested();
    error V3InvalidAmountOut();
    error V3InvalidCaller();
    /// @dev Used as the placeholder value for maxAmountIn, because the computed amount in for an exact output swap
    /// can never actually be this value
    uint256 private constant DEFAULT_MAX_AMOUNT_IN = type(uint256).max;
    /// @dev Transient storage variable used for checking slippage
    uint256 private maxAmountInCached = DEFAULT_MAX_AMOUNT_IN;
    /// @dev The minimum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MIN_TICK)
    uint160 internal constant MIN_SQRT_RATIO = 4295128739;
    /// @dev The maximum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MAX_TICK)
    uint160 internal constant MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342;
    function uniswapV3SwapCallback(int256 amount0Delta, int256 amount1Delta, bytes calldata data) external {
        if (amount0Delta <= 0 && amount1Delta <= 0) revert V3InvalidSwap(); // swaps entirely within 0-liquidity regions are not supported
        (, address payer) = abi.decode(data, (bytes, address));
        bytes calldata path = data.toBytes(0);
        // because exact output swaps are executed in reverse order, in this case tokenOut is actually tokenIn
        (address tokenIn, uint24 fee, address tokenOut) = path.decodeFirstPool();
        if (computePoolAddress(tokenIn, tokenOut, fee) != msg.sender) revert V3InvalidCaller();
        (bool isExactInput, uint256 amountToPay) =
            amount0Delta > 0 ? (tokenIn < tokenOut, uint256(amount0Delta)) : (tokenOut < tokenIn, uint256(amount1Delta));
        if (isExactInput) {
            // Pay the pool (msg.sender)
            payOrPermit2Transfer(tokenIn, payer, msg.sender, amountToPay);
        } else {
            // either initiate the next swap or pay
            if (path.hasMultiplePools()) {
                // this is an intermediate step so the payer is actually this contract
                path = path.skipToken();
                _swap(-amountToPay.toInt256(), msg.sender, path, payer, false);
            } else {
                if (amountToPay > maxAmountInCached) revert V3TooMuchRequested();
                // note that because exact output swaps are executed in reverse order, tokenOut is actually tokenIn
                payOrPermit2Transfer(tokenOut, payer, msg.sender, amountToPay);
            }
        }
    }
    /// @notice Performs a Uniswap v3 exact input swap
    /// @param recipient The recipient of the output tokens
    /// @param amountIn The amount of input tokens for the trade
    /// @param amountOutMinimum The minimum desired amount of output tokens
    /// @param path The path of the trade as a bytes string
    /// @param payer The address that will be paying the input
    function v3SwapExactInput(
        address recipient,
        uint256 amountIn,
        uint256 amountOutMinimum,
        bytes calldata path,
        address payer
    ) internal {
        // use amountIn == Constants.CONTRACT_BALANCE as a flag to swap the entire balance of the contract
        if (amountIn == Constants.CONTRACT_BALANCE) {
            address tokenIn = path.decodeFirstToken();
            amountIn = ERC20(tokenIn).balanceOf(address(this));
        }
        uint256 amountOut;
        while (true) {
            bool hasMultiplePools = path.hasMultiplePools();
            // the outputs of prior swaps become the inputs to subsequent ones
            (int256 amount0Delta, int256 amount1Delta, bool zeroForOne) = _swap(
                amountIn.toInt256(),
                hasMultiplePools ? address(this) : recipient, // for intermediate swaps, this contract custodies
                path.getFirstPool(), // only the first pool is needed
                payer, // for intermediate swaps, this contract custodies
                true
            );
            amountIn = uint256(-(zeroForOne ? amount1Delta : amount0Delta));
            // decide whether to continue or terminate
            if (hasMultiplePools) {
                payer = address(this);
                path = path.skipToken();
            } else {
                amountOut = amountIn;
                break;
            }
        }
        if (amountOut < amountOutMinimum) revert V3TooLittleReceived();
    }
    /// @notice Performs a Uniswap v3 exact output swap
    /// @param recipient The recipient of the output tokens
    /// @param amountOut The amount of output tokens to receive for the trade
    /// @param amountInMaximum The maximum desired amount of input tokens
    /// @param path The path of the trade as a bytes string
    /// @param payer The address that will be paying the input
    function v3SwapExactOutput(
        address recipient,
        uint256 amountOut,
        uint256 amountInMaximum,
        bytes calldata path,
        address payer
    ) internal {
        maxAmountInCached = amountInMaximum;
        (int256 amount0Delta, int256 amount1Delta, bool zeroForOne) =
            _swap(-amountOut.toInt256(), recipient, path, payer, false);
        uint256 amountOutReceived = zeroForOne ? uint256(-amount1Delta) : uint256(-amount0Delta);
        if (amountOutReceived != amountOut) revert V3InvalidAmountOut();
        maxAmountInCached = DEFAULT_MAX_AMOUNT_IN;
    }
    /// @dev Performs a single swap for both exactIn and exactOut
    /// For exactIn, `amount` is `amountIn`. For exactOut, `amount` is `-amountOut`
    function _swap(int256 amount, address recipient, bytes calldata path, address payer, bool isExactIn)
        private
        returns (int256 amount0Delta, int256 amount1Delta, bool zeroForOne)
    {
        (address tokenIn, uint24 fee, address tokenOut) = path.decodeFirstPool();
        zeroForOne = isExactIn ? tokenIn < tokenOut : tokenOut < tokenIn;
        (amount0Delta, amount1Delta) = IUniswapV3Pool(computePoolAddress(tokenIn, tokenOut, fee)).swap(
            recipient,
            zeroForOne,
            amount,
            (zeroForOne ? MIN_SQRT_RATIO + 1 : MAX_SQRT_RATIO - 1),
            abi.encode(path, payer)
        );
    }
    function computePoolAddress(address tokenA, address tokenB, uint24 fee) private view returns (address pool) {
        if (tokenA > tokenB) (tokenA, tokenB) = (tokenB, tokenA);
        pool = address(
            uint160(
                uint256(
                    keccak256(
                        abi.encodePacked(
                            hex'ff',
                            UNISWAP_V3_FACTORY,
                            keccak256(abi.encode(tokenA, tokenB, fee)),
                            UNISWAP_V3_POOL_INIT_CODE_HASH
                        )
                    )
                )
            )
        );
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
/// @title Library for Bytes Manipulation
pragma solidity ^0.8.0;
import {Constants} from '../../../libraries/Constants.sol';
library BytesLib {
    error SliceOutOfBounds();
    /// @notice Returns the address starting at byte 0
    /// @dev length and overflow checks must be carried out before calling
    /// @param _bytes The input bytes string to slice
    /// @return _address The address starting at byte 0
    function toAddress(bytes calldata _bytes) internal pure returns (address _address) {
        if (_bytes.length < Constants.ADDR_SIZE) revert SliceOutOfBounds();
        assembly {
            _address := shr(96, calldataload(_bytes.offset))
        }
    }
    /// @notice Returns the pool details starting at byte 0
    /// @dev length and overflow checks must be carried out before calling
    /// @param _bytes The input bytes string to slice
    /// @return token0 The address at byte 0
    /// @return fee The uint24 starting at byte 20
    /// @return token1 The address at byte 23
    function toPool(bytes calldata _bytes) internal pure returns (address token0, uint24 fee, address token1) {
        if (_bytes.length < Constants.V3_POP_OFFSET) revert SliceOutOfBounds();
        assembly {
            let firstWord := calldataload(_bytes.offset)
            token0 := shr(96, firstWord)
            fee := and(shr(72, firstWord), 0xffffff)
            token1 := shr(96, calldataload(add(_bytes.offset, 23)))
        }
    }
    /// @notice Decode the `_arg`-th element in `_bytes` as a dynamic array
    /// @dev The decoding of `length` and `offset` is universal,
    /// whereas the type declaration of `res` instructs the compiler how to read it.
    /// @param _bytes The input bytes string to slice
    /// @param _arg The index of the argument to extract
    /// @return length Length of the array
    /// @return offset Pointer to the data part of the array
    function toLengthOffset(bytes calldata _bytes, uint256 _arg)
        internal
        pure
        returns (uint256 length, uint256 offset)
    {
        uint256 relativeOffset;
        assembly {
            // The offset of the `_arg`-th element is `32 * arg`, which stores the offset of the length pointer.
            // shl(5, x) is equivalent to mul(32, x)
            let lengthPtr := add(_bytes.offset, calldataload(add(_bytes.offset, shl(5, _arg))))
            length := calldataload(lengthPtr)
            offset := add(lengthPtr, 0x20)
            relativeOffset := sub(offset, _bytes.offset)
        }
        if (_bytes.length < length + relativeOffset) revert SliceOutOfBounds();
    }
    /// @notice Decode the `_arg`-th element in `_bytes` as `bytes`
    /// @param _bytes The input bytes string to extract a bytes string from
    /// @param _arg The index of the argument to extract
    function toBytes(bytes calldata _bytes, uint256 _arg) internal pure returns (bytes calldata res) {
        (uint256 length, uint256 offset) = toLengthOffset(_bytes, _arg);
        assembly {
            res.length := length
            res.offset := offset
        }
    }
    /// @notice Decode the `_arg`-th element in `_bytes` as `address[]`
    /// @param _bytes The input bytes string to extract an address array from
    /// @param _arg The index of the argument to extract
    function toAddressArray(bytes calldata _bytes, uint256 _arg) internal pure returns (address[] calldata res) {
        (uint256 length, uint256 offset) = toLengthOffset(_bytes, _arg);
        assembly {
            res.length := length
            res.offset := offset
        }
    }
    /// @notice Decode the `_arg`-th element in `_bytes` as `bytes[]`
    /// @param _bytes The input bytes string to extract a bytes array from
    /// @param _arg The index of the argument to extract
    function toBytesArray(bytes calldata _bytes, uint256 _arg) internal pure returns (bytes[] calldata res) {
        (uint256 length, uint256 offset) = toLengthOffset(_bytes, _arg);
        assembly {
            res.length := length
            res.offset := offset
        }
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {Constants} from '../libraries/Constants.sol';
import {RouterImmutables} from '../base/RouterImmutables.sol';
import {SafeTransferLib} from 'solmate/src/utils/SafeTransferLib.sol';
import {ERC20} from 'solmate/src/tokens/ERC20.sol';
import {ERC721} from 'solmate/src/tokens/ERC721.sol';
import {ERC1155} from 'solmate/src/tokens/ERC1155.sol';
/// @title Payments contract
/// @notice Performs various operations around the payment of ETH and tokens
abstract contract Payments is RouterImmutables {
    using SafeTransferLib for ERC20;
    using SafeTransferLib for address;
    error InsufficientToken();
    error InsufficientETH();
    error InvalidBips();
    error InvalidSpender();
    uint256 internal constant FEE_BIPS_BASE = 10_000;
    /// @notice Pays an amount of ETH or ERC20 to a recipient
    /// @param token The token to pay (can be ETH using Constants.ETH)
    /// @param recipient The address that will receive the payment
    /// @param value The amount to pay
    function pay(address token, address recipient, uint256 value) internal {
        if (token == Constants.ETH) {
            recipient.safeTransferETH(value);
        } else {
            if (value == Constants.CONTRACT_BALANCE) {
                value = ERC20(token).balanceOf(address(this));
            }
            ERC20(token).safeTransfer(recipient, value);
        }
    }
    /// @notice Approves a protocol to spend ERC20s in the router
    /// @param token The token to approve
    /// @param spender Which protocol to approve
    function approveERC20(ERC20 token, Spenders spender) internal {
        // check spender is one of our approved spenders
        address spenderAddress;
        /// @dev use 0 = Opensea Conduit for both Seaport v1.4 and v1.5
        if (spender == Spenders.OSConduit) spenderAddress = OPENSEA_CONDUIT;
        else if (spender == Spenders.Sudoswap) spenderAddress = SUDOSWAP;
        else revert InvalidSpender();
        // set approval
        token.safeApprove(spenderAddress, type(uint256).max);
    }
    /// @notice Pays a proportion of the contract's ETH or ERC20 to a recipient
    /// @param token The token to pay (can be ETH using Constants.ETH)
    /// @param recipient The address that will receive payment
    /// @param bips Portion in bips of whole balance of the contract
    function payPortion(address token, address recipient, uint256 bips) internal {
        if (bips == 0 || bips > FEE_BIPS_BASE) revert InvalidBips();
        if (token == Constants.ETH) {
            uint256 balance = address(this).balance;
            uint256 amount = (balance * bips) / FEE_BIPS_BASE;
            recipient.safeTransferETH(amount);
        } else {
            uint256 balance = ERC20(token).balanceOf(address(this));
            uint256 amount = (balance * bips) / FEE_BIPS_BASE;
            ERC20(token).safeTransfer(recipient, amount);
        }
    }
    /// @notice Sweeps all of the contract's ERC20 or ETH to an address
    /// @param token The token to sweep (can be ETH using Constants.ETH)
    /// @param recipient The address that will receive payment
    /// @param amountMinimum The minimum desired amount
    function sweep(address token, address recipient, uint256 amountMinimum) internal {
        uint256 balance;
        if (token == Constants.ETH) {
            balance = address(this).balance;
            if (balance < amountMinimum) revert InsufficientETH();
            if (balance > 0) recipient.safeTransferETH(balance);
        } else {
            balance = ERC20(token).balanceOf(address(this));
            if (balance < amountMinimum) revert InsufficientToken();
            if (balance > 0) ERC20(token).safeTransfer(recipient, balance);
        }
    }
    /// @notice Sweeps an ERC721 to a recipient from the contract
    /// @param token The ERC721 token to sweep
    /// @param recipient The address that will receive payment
    /// @param id The ID of the ERC721 to sweep
    function sweepERC721(address token, address recipient, uint256 id) internal {
        ERC721(token).safeTransferFrom(address(this), recipient, id);
    }
    /// @notice Sweeps all of the contract's ERC1155 to an address
    /// @param token The ERC1155 token to sweep
    /// @param recipient The address that will receive payment
    /// @param id The ID of the ERC1155 to sweep
    /// @param amountMinimum The minimum desired amount
    function sweepERC1155(address token, address recipient, uint256 id, uint256 amountMinimum) internal {
        uint256 balance = ERC1155(token).balanceOf(address(this), id);
        if (balance < amountMinimum) revert InsufficientToken();
        ERC1155(token).safeTransferFrom(address(this), recipient, id, balance, bytes(''));
    }
    /// @notice Wraps an amount of ETH into WETH
    /// @param recipient The recipient of the WETH
    /// @param amount The amount to wrap (can be CONTRACT_BALANCE)
    function wrapETH(address recipient, uint256 amount) internal {
        if (amount == Constants.CONTRACT_BALANCE) {
            amount = address(this).balance;
        } else if (amount > address(this).balance) {
            revert InsufficientETH();
        }
        if (amount > 0) {
            WETH9.deposit{value: amount}();
            if (recipient != address(this)) {
                WETH9.transfer(recipient, amount);
            }
        }
    }
    /// @notice Unwraps all of the contract's WETH into ETH
    /// @param recipient The recipient of the ETH
    /// @param amountMinimum The minimum amount of ETH desired
    function unwrapWETH9(address recipient, uint256 amountMinimum) internal {
        uint256 value = WETH9.balanceOf(address(this));
        if (value < amountMinimum) {
            revert InsufficientETH();
        }
        if (value > 0) {
            WETH9.withdraw(value);
            if (recipient != address(this)) {
                recipient.safeTransferETH(value);
            }
        }
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {IERC721Receiver} from '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import {IERC1155Receiver} from '@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol';
import {IERC165} from '@openzeppelin/contracts/utils/introspection/IERC165.sol';
/// @title ERC Callback Support
/// @notice Implements various functions introduced by a variety of ERCs for security reasons.
/// All are called by external contracts to ensure that this contract safely supports the ERC in question.
contract Callbacks is IERC721Receiver, IERC1155Receiver {
    function onERC721Received(address, address, uint256, bytes calldata) external pure returns (bytes4) {
        return this.onERC721Received.selector;
    }
    function onERC1155Received(address, address, uint256, uint256, bytes calldata) external pure returns (bytes4) {
        return this.onERC1155Received.selector;
    }
    function onERC1155BatchReceived(address, address, uint256[] calldata, uint256[] calldata, bytes calldata)
        external
        pure
        returns (bytes4)
    {
        return this.onERC1155BatchReceived.selector;
    }
    function supportsInterface(bytes4 interfaceId) external pure returns (bool) {
        return interfaceId == type(IERC1155Receiver).interfaceId || interfaceId == type(IERC721Receiver).interfaceId
            || interfaceId == type(IERC165).interfaceId;
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {Constants} from '../libraries/Constants.sol';
contract LockAndMsgSender {
    error ContractLocked();
    address internal constant NOT_LOCKED_FLAG = address(1);
    address internal lockedBy = NOT_LOCKED_FLAG;
    modifier isNotLocked() {
        if (msg.sender != address(this)) {
            if (lockedBy != NOT_LOCKED_FLAG) revert ContractLocked();
            lockedBy = msg.sender;
            _;
            lockedBy = NOT_LOCKED_FLAG;
        } else {
            _;
        }
    }
    /// @notice Calculates the recipient address for a command
    /// @param recipient The recipient or recipient-flag for the command
    /// @return output The resultant recipient for the command
    function map(address recipient) internal view returns (address) {
        if (recipient == Constants.MSG_SENDER) {
            return lockedBy;
        } else if (recipient == Constants.ADDRESS_THIS) {
            return address(this);
        } else {
            return recipient;
        }
    }
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Modern, minimalist, and gas efficient ERC-721 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract ERC721 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/
    event Transfer(address indexed from, address indexed to, uint256 indexed id);
    event Approval(address indexed owner, address indexed spender, uint256 indexed id);
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
    /*//////////////////////////////////////////////////////////////
                         METADATA STORAGE/LOGIC
    //////////////////////////////////////////////////////////////*/
    string public name;
    string public symbol;
    function tokenURI(uint256 id) public view virtual returns (string memory);
    /*//////////////////////////////////////////////////////////////
                      ERC721 BALANCE/OWNER STORAGE
    //////////////////////////////////////////////////////////////*/
    mapping(uint256 => address) internal _ownerOf;
    mapping(address => uint256) internal _balanceOf;
    function ownerOf(uint256 id) public view virtual returns (address owner) {
        require((owner = _ownerOf[id]) != address(0), "NOT_MINTED");
    }
    function balanceOf(address owner) public view virtual returns (uint256) {
        require(owner != address(0), "ZERO_ADDRESS");
        return _balanceOf[owner];
    }
    /*//////////////////////////////////////////////////////////////
                         ERC721 APPROVAL STORAGE
    //////////////////////////////////////////////////////////////*/
    mapping(uint256 => address) public getApproved;
    mapping(address => mapping(address => bool)) public isApprovedForAll;
    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/
    constructor(string memory _name, string memory _symbol) {
        name = _name;
        symbol = _symbol;
    }
    /*//////////////////////////////////////////////////////////////
                              ERC721 LOGIC
    //////////////////////////////////////////////////////////////*/
    function approve(address spender, uint256 id) public virtual {
        address owner = _ownerOf[id];
        require(msg.sender == owner || isApprovedForAll[owner][msg.sender], "NOT_AUTHORIZED");
        getApproved[id] = spender;
        emit Approval(owner, spender, id);
    }
    function setApprovalForAll(address operator, bool approved) public virtual {
        isApprovedForAll[msg.sender][operator] = approved;
        emit ApprovalForAll(msg.sender, operator, approved);
    }
    function transferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        require(from == _ownerOf[id], "WRONG_FROM");
        require(to != address(0), "INVALID_RECIPIENT");
        require(
            msg.sender == from || isApprovedForAll[from][msg.sender] || msg.sender == getApproved[id],
            "NOT_AUTHORIZED"
        );
        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        unchecked {
            _balanceOf[from]--;
            _balanceOf[to]++;
        }
        _ownerOf[id] = to;
        delete getApproved[id];
        emit Transfer(from, to, id);
    }
    function safeTransferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        transferFrom(from, to, id);
        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        bytes calldata data
    ) public virtual {
        transferFrom(from, to, id);
        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
    /*//////////////////////////////////////////////////////////////
                              ERC165 LOGIC
    //////////////////////////////////////////////////////////////*/
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
            interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
    }
    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/
    function _mint(address to, uint256 id) internal virtual {
        require(to != address(0), "INVALID_RECIPIENT");
        require(_ownerOf[id] == address(0), "ALREADY_MINTED");
        // Counter overflow is incredibly unrealistic.
        unchecked {
            _balanceOf[to]++;
        }
        _ownerOf[id] = to;
        emit Transfer(address(0), to, id);
    }
    function _burn(uint256 id) internal virtual {
        address owner = _ownerOf[id];
        require(owner != address(0), "NOT_MINTED");
        // Ownership check above ensures no underflow.
        unchecked {
            _balanceOf[owner]--;
        }
        delete _ownerOf[id];
        delete getApproved[id];
        emit Transfer(owner, address(0), id);
    }
    /*//////////////////////////////////////////////////////////////
                        INTERNAL SAFE MINT LOGIC
    //////////////////////////////////////////////////////////////*/
    function _safeMint(address to, uint256 id) internal virtual {
        _mint(to, id);
        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, "") ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
    function _safeMint(
        address to,
        uint256 id,
        bytes memory data
    ) internal virtual {
        _mint(to, id);
        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, data) ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
}
/// @notice A generic interface for a contract which properly accepts ERC721 tokens.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract ERC721TokenReceiver {
    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) external virtual returns (bytes4) {
        return ERC721TokenReceiver.onERC721Received.selector;
    }
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Minimalist and gas efficient standard ERC1155 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC1155.sol)
abstract contract ERC1155 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/
    event TransferSingle(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256 id,
        uint256 amount
    );
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] amounts
    );
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
    event URI(string value, uint256 indexed id);
    /*//////////////////////////////////////////////////////////////
                             ERC1155 STORAGE
    //////////////////////////////////////////////////////////////*/
    mapping(address => mapping(uint256 => uint256)) public balanceOf;
    mapping(address => mapping(address => bool)) public isApprovedForAll;
    /*//////////////////////////////////////////////////////////////
                             METADATA LOGIC
    //////////////////////////////////////////////////////////////*/
    function uri(uint256 id) public view virtual returns (string memory);
    /*//////////////////////////////////////////////////////////////
                              ERC1155 LOGIC
    //////////////////////////////////////////////////////////////*/
    function setApprovalForAll(address operator, bool approved) public virtual {
        isApprovedForAll[msg.sender][operator] = approved;
        emit ApprovalForAll(msg.sender, operator, approved);
    }
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) public virtual {
        require(msg.sender == from || isApprovedForAll[from][msg.sender], "NOT_AUTHORIZED");
        balanceOf[from][id] -= amount;
        balanceOf[to][id] += amount;
        emit TransferSingle(msg.sender, from, to, id, amount);
        require(
            to.code.length == 0
                ? to != address(0)
                : ERC1155TokenReceiver(to).onERC1155Received(msg.sender, from, id, amount, data) ==
                    ERC1155TokenReceiver.onERC1155Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) public virtual {
        require(ids.length == amounts.length, "LENGTH_MISMATCH");
        require(msg.sender == from || isApprovedForAll[from][msg.sender], "NOT_AUTHORIZED");
        // Storing these outside the loop saves ~15 gas per iteration.
        uint256 id;
        uint256 amount;
        for (uint256 i = 0; i < ids.length; ) {
            id = ids[i];
            amount = amounts[i];
            balanceOf[from][id] -= amount;
            balanceOf[to][id] += amount;
            // An array can't have a total length
            // larger than the max uint256 value.
            unchecked {
                ++i;
            }
        }
        emit TransferBatch(msg.sender, from, to, ids, amounts);
        require(
            to.code.length == 0
                ? to != address(0)
                : ERC1155TokenReceiver(to).onERC1155BatchReceived(msg.sender, from, ids, amounts, data) ==
                    ERC1155TokenReceiver.onERC1155BatchReceived.selector,
            "UNSAFE_RECIPIENT"
        );
    }
    function balanceOfBatch(address[] calldata owners, uint256[] calldata ids)
        public
        view
        virtual
        returns (uint256[] memory balances)
    {
        require(owners.length == ids.length, "LENGTH_MISMATCH");
        balances = new uint256[](owners.length);
        // Unchecked because the only math done is incrementing
        // the array index counter which cannot possibly overflow.
        unchecked {
            for (uint256 i = 0; i < owners.length; ++i) {
                balances[i] = balanceOf[owners[i]][ids[i]];
            }
        }
    }
    /*//////////////////////////////////////////////////////////////
                              ERC165 LOGIC
    //////////////////////////////////////////////////////////////*/
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0xd9b67a26 || // ERC165 Interface ID for ERC1155
            interfaceId == 0x0e89341c; // ERC165 Interface ID for ERC1155MetadataURI
    }
    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/
    function _mint(
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        balanceOf[to][id] += amount;
        emit TransferSingle(msg.sender, address(0), to, id, amount);
        require(
            to.code.length == 0
                ? to != address(0)
                : ERC1155TokenReceiver(to).onERC1155Received(msg.sender, address(0), id, amount, data) ==
                    ERC1155TokenReceiver.onERC1155Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
    function _batchMint(
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        uint256 idsLength = ids.length; // Saves MLOADs.
        require(idsLength == amounts.length, "LENGTH_MISMATCH");
        for (uint256 i = 0; i < idsLength; ) {
            balanceOf[to][ids[i]] += amounts[i];
            // An array can't have a total length
            // larger than the max uint256 value.
            unchecked {
                ++i;
            }
        }
        emit TransferBatch(msg.sender, address(0), to, ids, amounts);
        require(
            to.code.length == 0
                ? to != address(0)
                : ERC1155TokenReceiver(to).onERC1155BatchReceived(msg.sender, address(0), ids, amounts, data) ==
                    ERC1155TokenReceiver.onERC1155BatchReceived.selector,
            "UNSAFE_RECIPIENT"
        );
    }
    function _batchBurn(
        address from,
        uint256[] memory ids,
        uint256[] memory amounts
    ) internal virtual {
        uint256 idsLength = ids.length; // Saves MLOADs.
        require(idsLength == amounts.length, "LENGTH_MISMATCH");
        for (uint256 i = 0; i < idsLength; ) {
            balanceOf[from][ids[i]] -= amounts[i];
            // An array can't have a total length
            // larger than the max uint256 value.
            unchecked {
                ++i;
            }
        }
        emit TransferBatch(msg.sender, from, address(0), ids, amounts);
    }
    function _burn(
        address from,
        uint256 id,
        uint256 amount
    ) internal virtual {
        balanceOf[from][id] -= amount;
        emit TransferSingle(msg.sender, from, address(0), id, amount);
    }
}
/// @notice A generic interface for a contract which properly accepts ERC1155 tokens.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC1155.sol)
abstract contract ERC1155TokenReceiver {
    function onERC1155Received(
        address,
        address,
        uint256,
        uint256,
        bytes calldata
    ) external virtual returns (bytes4) {
        return ERC1155TokenReceiver.onERC1155Received.selector;
    }
    function onERC1155BatchReceived(
        address,
        address,
        uint256[] calldata,
        uint256[] calldata,
        bytes calldata
    ) external virtual returns (bytes4) {
        return ERC1155TokenReceiver.onERC1155BatchReceived.selector;
    }
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/
    event Transfer(address indexed from, address indexed to, uint256 amount);
    event Approval(address indexed owner, address indexed spender, uint256 amount);
    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/
    string public name;
    string public symbol;
    uint8 public immutable decimals;
    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;
    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/
    uint256 internal immutable INITIAL_CHAIN_ID;
    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;
    mapping(address => uint256) public nonces;
    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/
    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }
    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/
    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }
    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;
        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }
        emit Transfer(msg.sender, to, amount);
        return true;
    }
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.
        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;
        balanceOf[from] -= amount;
        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }
        emit Transfer(from, to, amount);
        return true;
    }
    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");
        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\\x19\\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );
            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");
            allowance[recoveredAddress][spender] = value;
        }
        emit Approval(owner, spender, value);
    }
    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }
    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }
    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/
    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;
        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }
        emit Transfer(address(0), to, amount);
    }
    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;
        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }
        emit Transfer(from, address(0), amount);
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
/// @title AllowanceTransfer
/// @notice Handles ERC20 token permissions through signature based allowance setting and ERC20 token transfers by checking allowed amounts
/// @dev Requires user's token approval on the Permit2 contract
interface IAllowanceTransfer {
    /// @notice Thrown when an allowance on a token has expired.
    /// @param deadline The timestamp at which the allowed amount is no longer valid
    error AllowanceExpired(uint256 deadline);
    /// @notice Thrown when an allowance on a token has been depleted.
    /// @param amount The maximum amount allowed
    error InsufficientAllowance(uint256 amount);
    /// @notice Thrown when too many nonces are invalidated.
    error ExcessiveInvalidation();
    /// @notice Emits an event when the owner successfully invalidates an ordered nonce.
    event NonceInvalidation(
        address indexed owner, address indexed token, address indexed spender, uint48 newNonce, uint48 oldNonce
    );
    /// @notice Emits an event when the owner successfully sets permissions on a token for the spender.
    event Approval(
        address indexed owner, address indexed token, address indexed spender, uint160 amount, uint48 expiration
    );
    /// @notice Emits an event when the owner successfully sets permissions using a permit signature on a token for the spender.
    event Permit(
        address indexed owner,
        address indexed token,
        address indexed spender,
        uint160 amount,
        uint48 expiration,
        uint48 nonce
    );
    /// @notice Emits an event when the owner sets the allowance back to 0 with the lockdown function.
    event Lockdown(address indexed owner, address token, address spender);
    /// @notice The permit data for a token
    struct PermitDetails {
        // ERC20 token address
        address token;
        // the maximum amount allowed to spend
        uint160 amount;
        // timestamp at which a spender's token allowances become invalid
        uint48 expiration;
        // an incrementing value indexed per owner,token,and spender for each signature
        uint48 nonce;
    }
    /// @notice The permit message signed for a single token allownce
    struct PermitSingle {
        // the permit data for a single token alownce
        PermitDetails details;
        // address permissioned on the allowed tokens
        address spender;
        // deadline on the permit signature
        uint256 sigDeadline;
    }
    /// @notice The permit message signed for multiple token allowances
    struct PermitBatch {
        // the permit data for multiple token allowances
        PermitDetails[] details;
        // address permissioned on the allowed tokens
        address spender;
        // deadline on the permit signature
        uint256 sigDeadline;
    }
    /// @notice The saved permissions
    /// @dev This info is saved per owner, per token, per spender and all signed over in the permit message
    /// @dev Setting amount to type(uint160).max sets an unlimited approval
    struct PackedAllowance {
        // amount allowed
        uint160 amount;
        // permission expiry
        uint48 expiration;
        // an incrementing value indexed per owner,token,and spender for each signature
        uint48 nonce;
    }
    /// @notice A token spender pair.
    struct TokenSpenderPair {
        // the token the spender is approved
        address token;
        // the spender address
        address spender;
    }
    /// @notice Details for a token transfer.
    struct AllowanceTransferDetails {
        // the owner of the token
        address from;
        // the recipient of the token
        address to;
        // the amount of the token
        uint160 amount;
        // the token to be transferred
        address token;
    }
    /// @notice A mapping from owner address to token address to spender address to PackedAllowance struct, which contains details and conditions of the approval.
    /// @notice The mapping is indexed in the above order see: allowance[ownerAddress][tokenAddress][spenderAddress]
    /// @dev The packed slot holds the allowed amount, expiration at which the allowed amount is no longer valid, and current nonce thats updated on any signature based approvals.
    function allowance(address, address, address) external view returns (uint160, uint48, uint48);
    /// @notice Approves the spender to use up to amount of the specified token up until the expiration
    /// @param token The token to approve
    /// @param spender The spender address to approve
    /// @param amount The approved amount of the token
    /// @param expiration The timestamp at which the approval is no longer valid
    /// @dev The packed allowance also holds a nonce, which will stay unchanged in approve
    /// @dev Setting amount to type(uint160).max sets an unlimited approval
    function approve(address token, address spender, uint160 amount, uint48 expiration) external;
    /// @notice Permit a spender to a given amount of the owners token via the owner's EIP-712 signature
    /// @dev May fail if the owner's nonce was invalidated in-flight by invalidateNonce
    /// @param owner The owner of the tokens being approved
    /// @param permitSingle Data signed over by the owner specifying the terms of approval
    /// @param signature The owner's signature over the permit data
    function permit(address owner, PermitSingle memory permitSingle, bytes calldata signature) external;
    /// @notice Permit a spender to the signed amounts of the owners tokens via the owner's EIP-712 signature
    /// @dev May fail if the owner's nonce was invalidated in-flight by invalidateNonce
    /// @param owner The owner of the tokens being approved
    /// @param permitBatch Data signed over by the owner specifying the terms of approval
    /// @param signature The owner's signature over the permit data
    function permit(address owner, PermitBatch memory permitBatch, bytes calldata signature) external;
    /// @notice Transfer approved tokens from one address to another
    /// @param from The address to transfer from
    /// @param to The address of the recipient
    /// @param amount The amount of the token to transfer
    /// @param token The token address to transfer
    /// @dev Requires the from address to have approved at least the desired amount
    /// of tokens to msg.sender.
    function transferFrom(address from, address to, uint160 amount, address token) external;
    /// @notice Transfer approved tokens in a batch
    /// @param transferDetails Array of owners, recipients, amounts, and tokens for the transfers
    /// @dev Requires the from addresses to have approved at least the desired amount
    /// of tokens to msg.sender.
    function transferFrom(AllowanceTransferDetails[] calldata transferDetails) external;
    /// @notice Enables performing a "lockdown" of the sender's Permit2 identity
    /// by batch revoking approvals
    /// @param approvals Array of approvals to revoke.
    function lockdown(TokenSpenderPair[] calldata approvals) external;
    /// @notice Invalidate nonces for a given (token, spender) pair
    /// @param token The token to invalidate nonces for
    /// @param spender The spender to invalidate nonces for
    /// @param newNonce The new nonce to set. Invalidates all nonces less than it.
    /// @dev Can't invalidate more than 2**16 nonces per transaction.
    function invalidateNonces(address token, address spender, uint48 newNonce) external;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.4;
/// @title Interface for CryptoPunksMarket
interface ICryptoPunksMarket {
    /// @notice Buy a cryptopunk
    function buyPunk(uint256 punkIndex) external payable;
    /// @notice Transfer a cryptopunk to another address
    function transferPunk(address to, uint256 punkIndex) external;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
import {ERC20} from "../tokens/ERC20.sol";
/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/
    function safeTransferETH(address to, uint256 amount) internal {
        bool success;
        /// @solidity memory-safe-assembly
        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }
        require(success, "ETH_TRANSFER_FAILED");
    }
    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/
    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;
        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)
            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument.
            mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument.
            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }
        require(success, "TRANSFER_FROM_FAILED");
    }
    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;
        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)
            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.
            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }
        require(success, "TRANSFER_FAILED");
    }
    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;
        /// @solidity memory-safe-assembly
        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)
            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.
            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }
        require(success, "APPROVE_FAILED");
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.15;
import {ERC20} from 'solmate/src/tokens/ERC20.sol';
/// @title LooksRare Rewards Collector
/// @notice Implements a permissionless call to fetch LooksRare rewards earned by Universal Router users
/// and transfers them to an external rewards distributor contract
interface IRewardsCollector {
    /// @notice Fetches users' LooksRare rewards and sends them to the distributor contract
    /// @param looksRareClaim The data required by LooksRare to claim reward tokens
    function collectRewards(bytes calldata looksRareClaim) external;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.4;
import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
/// @title Interface for WETH9
interface IWETH9 is IERC20 {
    /// @notice Deposit ether to get wrapped ether
    function deposit() external payable;
    /// @notice Withdraw wrapped ether to get ether
    function withdraw(uint256) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
 * @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 `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);
    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}
pragma solidity >=0.5.0;
interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);
    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);
    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);
    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);
    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);
    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);
    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;
    function initialize(address, address) external;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.8.0;
import {IUniswapV2Pair} from '@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol';
/// @title Uniswap v2 Helper Library
/// @notice Calculates the recipient address for a command
library UniswapV2Library {
    error InvalidReserves();
    error InvalidPath();
    /// @notice Calculates the v2 address for a pair without making any external calls
    /// @param factory The address of the v2 factory
    /// @param initCodeHash The hash of the pair initcode
    /// @param tokenA One of the tokens in the pair
    /// @param tokenB The other token in the pair
    /// @return pair The resultant v2 pair address
    function pairFor(address factory, bytes32 initCodeHash, address tokenA, address tokenB)
        internal
        pure
        returns (address pair)
    {
        (address token0, address token1) = sortTokens(tokenA, tokenB);
        pair = pairForPreSorted(factory, initCodeHash, token0, token1);
    }
    /// @notice Calculates the v2 address for a pair and the pair's token0
    /// @param factory The address of the v2 factory
    /// @param initCodeHash The hash of the pair initcode
    /// @param tokenA One of the tokens in the pair
    /// @param tokenB The other token in the pair
    /// @return pair The resultant v2 pair address
    /// @return token0 The token considered token0 in this pair
    function pairAndToken0For(address factory, bytes32 initCodeHash, address tokenA, address tokenB)
        internal
        pure
        returns (address pair, address token0)
    {
        address token1;
        (token0, token1) = sortTokens(tokenA, tokenB);
        pair = pairForPreSorted(factory, initCodeHash, token0, token1);
    }
    /// @notice Calculates the v2 address for a pair assuming the input tokens are pre-sorted
    /// @param factory The address of the v2 factory
    /// @param initCodeHash The hash of the pair initcode
    /// @param token0 The pair's token0
    /// @param token1 The pair's token1
    /// @return pair The resultant v2 pair address
    function pairForPreSorted(address factory, bytes32 initCodeHash, address token0, address token1)
        private
        pure
        returns (address pair)
    {
        pair = address(
            uint160(
                uint256(
                    keccak256(
                        abi.encodePacked(hex'ff', factory, keccak256(abi.encodePacked(token0, token1)), initCodeHash)
                    )
                )
            )
        );
    }
    /// @notice Calculates the v2 address for a pair and fetches the reserves for each token
    /// @param factory The address of the v2 factory
    /// @param initCodeHash The hash of the pair initcode
    /// @param tokenA One of the tokens in the pair
    /// @param tokenB The other token in the pair
    /// @return pair The resultant v2 pair address
    /// @return reserveA The reserves for tokenA
    /// @return reserveB The reserves for tokenB
    function pairAndReservesFor(address factory, bytes32 initCodeHash, address tokenA, address tokenB)
        private
        view
        returns (address pair, uint256 reserveA, uint256 reserveB)
    {
        address token0;
        (pair, token0) = pairAndToken0For(factory, initCodeHash, tokenA, tokenB);
        (uint256 reserve0, uint256 reserve1,) = IUniswapV2Pair(pair).getReserves();
        (reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
    }
    /// @notice Given an input asset amount returns the maximum output amount of the other asset
    /// @param amountIn The token input amount
    /// @param reserveIn The reserves available of the input token
    /// @param reserveOut The reserves available of the output token
    /// @return amountOut The output amount of the output token
    function getAmountOut(uint256 amountIn, uint256 reserveIn, uint256 reserveOut)
        internal
        pure
        returns (uint256 amountOut)
    {
        if (reserveIn == 0 || reserveOut == 0) revert InvalidReserves();
        uint256 amountInWithFee = amountIn * 997;
        uint256 numerator = amountInWithFee * reserveOut;
        uint256 denominator = reserveIn * 1000 + amountInWithFee;
        amountOut = numerator / denominator;
    }
    /// @notice Returns the input amount needed for a desired output amount in a single-hop trade
    /// @param amountOut The desired output amount
    /// @param reserveIn The reserves available of the input token
    /// @param reserveOut The reserves available of the output token
    /// @return amountIn The input amount of the input token
    function getAmountIn(uint256 amountOut, uint256 reserveIn, uint256 reserveOut)
        internal
        pure
        returns (uint256 amountIn)
    {
        if (reserveIn == 0 || reserveOut == 0) revert InvalidReserves();
        uint256 numerator = reserveIn * amountOut * 1000;
        uint256 denominator = (reserveOut - amountOut) * 997;
        amountIn = (numerator / denominator) + 1;
    }
    /// @notice Returns the input amount needed for a desired output amount in a multi-hop trade
    /// @param factory The address of the v2 factory
    /// @param initCodeHash The hash of the pair initcode
    /// @param amountOut The desired output amount
    /// @param path The path of the multi-hop trade
    /// @return amount The input amount of the input token
    /// @return pair The first pair in the trade
    function getAmountInMultihop(address factory, bytes32 initCodeHash, uint256 amountOut, address[] memory path)
        internal
        view
        returns (uint256 amount, address pair)
    {
        if (path.length < 2) revert InvalidPath();
        amount = amountOut;
        for (uint256 i = path.length - 1; i > 0; i--) {
            uint256 reserveIn;
            uint256 reserveOut;
            (pair, reserveIn, reserveOut) = pairAndReservesFor(factory, initCodeHash, path[i - 1], path[i]);
            amount = getAmountIn(amount, reserveIn, reserveOut);
        }
    }
    /// @notice Sorts two tokens to return token0 and token1
    /// @param tokenA The first token to sort
    /// @param tokenB The other token to sort
    /// @return token0 The smaller token by address value
    /// @return token1 The larger token by address value
    function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
        (token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
    }
}
pragma solidity ^0.8.17;
import {IAllowanceTransfer} from 'permit2/src/interfaces/IAllowanceTransfer.sol';
import {SafeCast160} from 'permit2/src/libraries/SafeCast160.sol';
import {Payments} from './Payments.sol';
import {Constants} from '../libraries/Constants.sol';
import {RouterImmutables} from '../base/RouterImmutables.sol';
/// @title Payments through Permit2
/// @notice Performs interactions with Permit2 to transfer tokens
abstract contract Permit2Payments is Payments {
    using SafeCast160 for uint256;
    error FromAddressIsNotOwner();
    /// @notice Performs a transferFrom on Permit2
    /// @param token The token to transfer
    /// @param from The address to transfer from
    /// @param to The recipient of the transfer
    /// @param amount The amount to transfer
    function permit2TransferFrom(address token, address from, address to, uint160 amount) internal {
        PERMIT2.transferFrom(from, to, amount, token);
    }
    /// @notice Performs a batch transferFrom on Permit2
    /// @param batchDetails An array detailing each of the transfers that should occur
    function permit2TransferFrom(IAllowanceTransfer.AllowanceTransferDetails[] memory batchDetails, address owner)
        internal
    {
        uint256 batchLength = batchDetails.length;
        for (uint256 i = 0; i < batchLength; ++i) {
            if (batchDetails[i].from != owner) revert FromAddressIsNotOwner();
        }
        PERMIT2.transferFrom(batchDetails);
    }
    /// @notice Either performs a regular payment or transferFrom on Permit2, depending on the payer address
    /// @param token The token to transfer
    /// @param payer The address to pay for the transfer
    /// @param recipient The recipient of the transfer
    /// @param amount The amount to transfer
    function payOrPermit2Transfer(address token, address payer, address recipient, uint256 amount) internal {
        if (payer == address(this)) pay(token, recipient, amount);
        else permit2TransferFrom(token, payer, recipient, amount.toUint160());
    }
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.17;
import {IWETH9} from '../interfaces/external/IWETH9.sol';
/// @title Constant state
/// @notice Constant state used by the Universal Router
library Constants {
    /// @dev Used for identifying cases when this contract's balance of a token is to be used as an input
    /// This value is equivalent to 1<<255, i.e. a singular 1 in the most significant bit.
    uint256 internal constant CONTRACT_BALANCE = 0x8000000000000000000000000000000000000000000000000000000000000000;
    /// @dev Used for identifying cases when a v2 pair has already received input tokens
    uint256 internal constant ALREADY_PAID = 0;
    /// @dev Used as a flag for identifying the transfer of ETH instead of a token
    address internal constant ETH = address(0);
    /// @dev Used as a flag for identifying that msg.sender should be used, saves gas by sending more 0 bytes
    address internal constant MSG_SENDER = address(1);
    /// @dev Used as a flag for identifying address(this) should be used, saves gas by sending more 0 bytes
    address internal constant ADDRESS_THIS = address(2);
    /// @dev The length of the bytes encoded address
    uint256 internal constant ADDR_SIZE = 20;
    /// @dev The length of the bytes encoded fee
    uint256 internal constant V3_FEE_SIZE = 3;
    /// @dev The offset of a single token address (20) and pool fee (3)
    uint256 internal constant NEXT_V3_POOL_OFFSET = ADDR_SIZE + V3_FEE_SIZE;
    /// @dev The offset of an encoded pool key
    /// Token (20) + Fee (3) + Token (20) = 43
    uint256 internal constant V3_POP_OFFSET = NEXT_V3_POOL_OFFSET + ADDR_SIZE;
    /// @dev The minimum length of an encoding that contains 2 or more pools
    uint256 internal constant MULTIPLE_V3_POOLS_MIN_LENGTH = V3_POP_OFFSET + NEXT_V3_POOL_OFFSET;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.0;
import {BytesLib} from './BytesLib.sol';
import {Constants} from '../../../libraries/Constants.sol';
/// @title Functions for manipulating path data for multihop swaps
library V3Path {
    using BytesLib for bytes;
    /// @notice Returns true iff the path contains two or more pools
    /// @param path The encoded swap path
    /// @return True if path contains two or more pools, otherwise false
    function hasMultiplePools(bytes calldata path) internal pure returns (bool) {
        return path.length >= Constants.MULTIPLE_V3_POOLS_MIN_LENGTH;
    }
    /// @notice Decodes the first pool in path
    /// @param path The bytes encoded swap path
    /// @return tokenA The first token of the given pool
    /// @return fee The fee level of the pool
    /// @return tokenB The second token of the given pool
    function decodeFirstPool(bytes calldata path) internal pure returns (address, uint24, address) {
        return path.toPool();
    }
    /// @notice Gets the segment corresponding to the first pool in the path
    /// @param path The bytes encoded swap path
    /// @return The segment containing all data necessary to target the first pool in the path
    function getFirstPool(bytes calldata path) internal pure returns (bytes calldata) {
        return path[:Constants.V3_POP_OFFSET];
    }
    function decodeFirstToken(bytes calldata path) internal pure returns (address tokenA) {
        tokenA = path.toAddress();
    }
    /// @notice Skips a token + fee element
    /// @param path The swap path
    function skipToken(bytes calldata path) internal pure returns (bytes calldata) {
        return path[Constants.NEXT_V3_POOL_OFFSET:];
    }
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Safe casting methods
/// @notice Contains methods for safely casting between types
library SafeCast {
    /// @notice Cast a uint256 to a uint160, revert on overflow
    /// @param y The uint256 to be downcasted
    /// @return z The downcasted integer, now type uint160
    function toUint160(uint256 y) internal pure returns (uint160 z) {
        require((z = uint160(y)) == y);
    }
    /// @notice Cast a int256 to a int128, revert on overflow or underflow
    /// @param y The int256 to be downcasted
    /// @return z The downcasted integer, now type int128
    function toInt128(int256 y) internal pure returns (int128 z) {
        require((z = int128(y)) == y);
    }
    /// @notice Cast a uint256 to a int256, revert on overflow
    /// @param y The uint256 to be casted
    /// @return z The casted integer, now type int256
    function toInt256(uint256 y) internal pure returns (int256 z) {
        require(y < 2**255);
        z = int256(y);
    }
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
import './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
{
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
    /// @dev In the implementation you must pay the pool tokens owed for the swap.
    /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
    /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
    /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
    /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
    /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
 * @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);
    /**
     * @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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from,
        address to,
        uint256 amount
    ) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
library SafeCast160 {
    /// @notice Thrown when a valude greater than type(uint160).max is cast to uint160
    error UnsafeCast();
    /// @notice Safely casts uint256 to uint160
    /// @param value The uint256 to be cast
    function toUint160(uint256 value) internal pure returns (uint160) {
        if (value > type(uint160).max) revert UnsafeCast();
        return uint160(value);
    }
}
// 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);
}
// 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
        );
}
// 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
        );
}
// 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;
}
// 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);
}
// 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);
}

// Copyright (C) 2015, 2016, 2017 Dapphub

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.4.18;

contract WETH9 {
    string public name     = "Wrapped Ether";
    string public symbol   = "WETH";
    uint8  public decimals = 18;

    event  Approval(address indexed src, address indexed guy, uint wad);
    event  Transfer(address indexed src, address indexed dst, uint wad);
    event  Deposit(address indexed dst, uint wad);
    event  Withdrawal(address indexed src, uint wad);

    mapping (address => uint)                       public  balanceOf;
    mapping (address => mapping (address => uint))  public  allowance;

    function() public payable {
        deposit();
    }
    function deposit() public payable {
        balanceOf[msg.sender] += msg.value;
        Deposit(msg.sender, msg.value);
    }
    function withdraw(uint wad) public {
        require(balanceOf[msg.sender] >= wad);
        balanceOf[msg.sender] -= wad;
        msg.sender.transfer(wad);
        Withdrawal(msg.sender, wad);
    }

    function totalSupply() public view returns (uint) {
        return this.balance;
    }

    function approve(address guy, uint wad) public returns (bool) {
        allowance[msg.sender][guy] = wad;
        Approval(msg.sender, guy, wad);
        return true;
    }

    function transfer(address dst, uint wad) public returns (bool) {
        return transferFrom(msg.sender, dst, wad);
    }

    function transferFrom(address src, address dst, uint wad)
        public
        returns (bool)
    {
        require(balanceOf[src] >= wad);

        if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
            require(allowance[src][msg.sender] >= wad);
            allowance[src][msg.sender] -= wad;
        }

        balanceOf[src] -= wad;
        balanceOf[dst] += wad;

        Transfer(src, dst, wad);

        return true;
    }
}


/*
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The GNU General Public License is a free, copyleft license for
software and other kinds of works.

  The licenses for most software and other practical works are designed
to take away your freedom to share and change the works.  By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users.  We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors.  You can apply it to
your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.

  To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights.  Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.

  For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received.  You must make sure that they, too, receive
or can get the source code.  And you must show them these terms so they
know their rights.

  Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.

  For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software.  For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.

  Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so.  This is fundamentally incompatible with the aim of
protecting users' freedom to change the software.  The systematic
pattern of such abuse occurs in the area of products for individuals to
use, which is precisely where it is most unacceptable.  Therefore, we
have designed this version of the GPL to prohibit the practice for those
products.  If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
of the GPL, as needed to protect the freedom of users.

  Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary.  To prevent this, the GPL assures that
patents cannot be used to render the program non-free.

  The precise terms and conditions for copying, distribution and
modification follow.

                       TERMS AND CONDITIONS

  0. Definitions.

  "This License" refers to version 3 of the GNU General Public License.

  "Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.

  "The Program" refers to any copyrightable work licensed under this
License.  Each licensee is addressed as "you".  "Licensees" and
"recipients" may be individuals or organizations.

  To "modify" a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of an
exact copy.  The resulting work is called a "modified version" of the
earlier work or a work "based on" the earlier work.

  A "covered work" means either the unmodified Program or a work based
on the Program.

  To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy.  Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.

  To "convey" a work means any kind of propagation that enables other
parties to make or receive copies.  Mere interaction with a user through
a computer network, with no transfer of a copy, is not conveying.

  An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
extent that warranties are provided), that licensees may convey the
work under this License, and how to view a copy of this License.  If
the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.

  1. Source Code.

  The "source code" for a work means the preferred form of the work
for making modifications to it.  "Object code" means any non-source
form of a work.

  A "Standard Interface" means an interface that either is an official
standard defined by a recognized standards body, or, in the case of
interfaces specified for a particular programming language, one that
is widely used among developers working in that language.

  The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form.  A
"Major Component", in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.

  The "Corresponding Source" for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts to
control those activities.  However, it does not include the work's
System Libraries, or general-purpose tools or generally available free
programs which are used unmodified in performing those activities but
which are not part of the work.  For example, Corresponding Source
includes interface definition files associated with source files for
the work, and the source code for shared libraries and dynamically
linked subprograms that the work is specifically designed to require,
such as by intimate data communication or control flow between those
subprograms and other parts of the work.

  The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
Source.

  The Corresponding Source for a work in source code form is that
same work.

  2. Basic Permissions.

  All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met.  This License explicitly affirms your unlimited
permission to run the unmodified Program.  The output from running a
covered work is covered by this License only if the output, given its
content, constitutes a covered work.  This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.

  You may make, run and propagate covered works that you do not
convey, without conditions so long as your license otherwise remains
in force.  You may convey covered works to others for the sole purpose
of having them make modifications exclusively for you, or provide you
with facilities for running those works, provided that you comply with
the terms of this License in conveying all material for which you do
not control copyright.  Those thus making or running the covered works
for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies of
your copyrighted material outside their relationship with you.

  Conveying under any other circumstances is permitted solely under
the conditions stated below.  Sublicensing is not allowed; section 10
makes it unnecessary.

  3. Protecting Users' Legal Rights From Anti-Circumvention Law.

  No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article
11 of the WIPO copyright treaty adopted on 20 December 1996, or
similar laws prohibiting or restricting circumvention of such
measures.

  When you convey a covered work, you waive any legal power to forbid
circumvention of technological measures to the extent such circumvention
is effected by exercising rights under this License with respect to
the covered work, and you disclaim any intention to limit operation or
modification of the work as a means of enforcing, against the work's
users, your or third parties' legal rights to forbid circumvention of
technological measures.

  4. Conveying Verbatim Copies.

  You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice;
keep intact all notices stating that this License and any
non-permissive terms added in accord with section 7 apply to the code;
keep intact all notices of the absence of any warranty; and give all
recipients a copy of this License along with the Program.

  You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.

  5. Conveying Modified Source Versions.

  You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the
terms of section 4, provided that you also meet all of these conditions:

    a) The work must carry prominent notices stating that you modified
    it, and giving a relevant date.

    b) The work must carry prominent notices stating that it is
    released under this License and any conditions added under section
    7.  This requirement modifies the requirement in section 4 to
    "keep intact all notices".

    c) You must license the entire work, as a whole, under this
    License to anyone who comes into possession of a copy.  This
    License will therefore apply, along with any applicable section 7
    additional terms, to the whole of the work, and all its parts,
    regardless of how they are packaged.  This License gives no
    permission to license the work in any other way, but it does not
    invalidate such permission if you have separately received it.

    d) If the work has interactive user interfaces, each must display
    Appropriate Legal Notices; however, if the Program has interactive
    interfaces that do not display Appropriate Legal Notices, your
    work need not make them do so.

  A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered work,
and which are not combined with it such as to form a larger program,
in or on a volume of a storage or distribution medium, is called an
"aggregate" if the compilation and its resulting copyright are not
used to limit the access or legal rights of the compilation's users
beyond what the individual works permit.  Inclusion of a covered work
in an aggregate does not cause this License to apply to the other
parts of the aggregate.

  6. Conveying Non-Source Forms.

  You may convey a covered work in object code form under the terms
of sections 4 and 5, provided that you also convey the
machine-readable Corresponding Source under the terms of this License,
in one of these ways:

    a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
    Corresponding Source fixed on a durable physical medium
    customarily used for software interchange.

    b) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by a
    written offer, valid for at least three years and valid for as
    long as you offer spare parts or customer support for that product
    model, to give anyone who possesses the object code either (1) a
    copy of the Corresponding Source for all the software in the
    product that is covered by this License, on a durable physical
    medium customarily used for software interchange, for a price no
    more than your reasonable cost of physically performing this
    conveying of source, or (2) access to copy the
    Corresponding Source from a network server at no charge.

    c) Convey individual copies of the object code with a copy of the
    written offer to provide the Corresponding Source.  This
    alternative is allowed only occasionally and noncommercially, and
    only if you received the object code with such an offer, in accord
    with subsection 6b.

    d) Convey the object code by offering access from a designated
    place (gratis or for a charge), and offer equivalent access to the
    Corresponding Source in the same way through the same place at no
    further charge.  You need not require recipients to copy the
    Corresponding Source along with the object code.  If the place to
    copy the object code is a network server, the Corresponding Source
    may be on a different server (operated by you or a third party)
    that supports equivalent copying facilities, provided you maintain
    clear directions next to the object code saying where to find the
    Corresponding Source.  Regardless of what server hosts the
    Corresponding Source, you remain obligated to ensure that it is
    available for as long as needed to satisfy these requirements.

    e) Convey the object code using peer-to-peer transmission, provided
    you inform other peers where the object code and Corresponding
    Source of the work are being offered to the general public at no
    charge under subsection 6d.

  A separable portion of the object code, whose source code is excluded
from the Corresponding Source as a System Library, need not be
included in conveying the object code work.

  A "User Product" is either (1) a "consumer product", which means any
tangible personal property which is normally used for personal, family,
or household purposes, or (2) anything designed or sold for incorporation
into a dwelling.  In determining whether a product is a consumer product,
doubtful cases shall be resolved in favor of coverage.  For a particular
product received by a particular user, "normally used" refers to a
typical or common use of that class of product, regardless of the status
of the particular user or of the way in which the particular user
actually uses, or expects or is expected to use, the product.  A product
is a consumer product regardless of whether the product has substantial
commercial, industrial or non-consumer uses, unless such uses represent
the only significant mode of use of the product.

  "Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required to install
and execute modified versions of a covered work in that User Product from
a modified version of its Corresponding Source.  The information must
suffice to ensure that the continued functioning of the modified object
code is in no case prevented or interfered with solely because
modification has been made.

  If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
part of a transaction in which the right of possession and use of the
User Product is transferred to the recipient in perpetuity or for a
fixed term (regardless of how the transaction is characterized), the
Corresponding Source conveyed under this section must be accompanied
by the Installation Information.  But this requirement does not apply
if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).

  The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or updates
for a work that has been modified or installed by the recipient, or for
the User Product in which it has been modified or installed.  Access to a
network may be denied when the modification itself materially and
adversely affects the operation of the network or violates the rules and
protocols for communication across the network.

  Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.

  7. Additional Terms.

  "Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law.  If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.

  When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it.  (Additional permissions may be written to require their own
removal in certain cases when you modify the work.)  You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.

  Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders of
that material) supplement the terms of this License with terms:

    a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or

    b) Requiring preservation of specified reasonable legal notices or
    author attributions in that material or in the Appropriate Legal
    Notices displayed by works containing it; or

    c) Prohibiting misrepresentation of the origin of that material, or
    requiring that modified versions of such material be marked in
    reasonable ways as different from the original version; or

    d) Limiting the use for publicity purposes of names of licensors or
    authors of the material; or

    e) Declining to grant rights under trademark law for use of some
    trade names, trademarks, or service marks; or

    f) Requiring indemnification of licensors and authors of that
    material by anyone who conveys the material (or modified versions of
    it) with contractual assumptions of liability to the recipient, for
    any liability that these contractual assumptions directly impose on
    those licensors and authors.

  All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10.  If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
restriction, you may remove that term.  If a license document contains
a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.

  If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.

  Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions;
the above requirements apply either way.

  8. Termination.

  You may not propagate or modify a covered work except as expressly
provided under this License.  Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).

  However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.

  Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.

  Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License.  If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.

  9. Acceptance Not Required for Having Copies.

  You are not required to accept this License in order to receive or
run a copy of the Program.  Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance.  However,
nothing other than this License grants you permission to propagate or
modify any covered work.  These actions infringe copyright if you do
not accept this License.  Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.

  10. Automatic Licensing of Downstream Recipients.

  Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License.  You are not responsible
for enforcing compliance by third parties with this License.

  An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations.  If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.

  You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License.  For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.

  11. Patents.

  A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based.  The
work thus licensed is called the contributor's "contributor version".

  A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version.  For
purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.

  Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.

  In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement).  To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.

  If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients.  "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.

  If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.

  A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License.  You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.

  Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.

  12. No Surrender of Others' Freedom.

  If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License.  If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all.  For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.

  13. Use with the GNU Affero General Public License.

  Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work.  The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.

  14. Revised Versions of this License.

  The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time.  Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

  Each version is given a distinguishing version number.  If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation.  If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.

  If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.

  Later license versions may give you additional or different
permissions.  However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.

  15. Disclaimer of Warranty.

  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

  16. Limitation of Liability.

  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.

  17. Interpretation of Sections 15 and 16.

  If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

  If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".

  You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.

  The GNU General Public License does not permit incorporating your program
into proprietary programs.  If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library.  If this is what you want to do, use the GNU Lesser General
Public License instead of this License.  But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

*/

// File: contracts/interfaces/IUniswapV2Pair.sol

pragma solidity >=0.5.0;

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

// File: contracts/interfaces/IUniswapV2ERC20.sol

pragma solidity >=0.5.0;

interface IUniswapV2ERC20 {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
}

// File: contracts/libraries/SafeMath.sol

pragma solidity =0.5.16;

// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)

library SafeMath {
    function add(uint x, uint y) internal pure returns (uint z) {
        require((z = x + y) >= x, 'ds-math-add-overflow');
    }

    function sub(uint x, uint y) internal pure returns (uint z) {
        require((z = x - y) <= x, 'ds-math-sub-underflow');
    }

    function mul(uint x, uint y) internal pure returns (uint z) {
        require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
    }
}

// File: contracts/UniswapV2ERC20.sol

pragma solidity =0.5.16;



contract UniswapV2ERC20 is IUniswapV2ERC20 {
    using SafeMath for uint;

    string public constant name = 'Uniswap V2';
    string public constant symbol = 'UNI-V2';
    uint8 public constant decimals = 18;
    uint  public totalSupply;
    mapping(address => uint) public balanceOf;
    mapping(address => mapping(address => uint)) public allowance;

    bytes32 public DOMAIN_SEPARATOR;
    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
    mapping(address => uint) public nonces;

    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    constructor() public {
        uint chainId;
        assembly {
            chainId := chainid
        }
        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
                keccak256(bytes(name)),
                keccak256(bytes('1')),
                chainId,
                address(this)
            )
        );
    }

    function _mint(address to, uint value) internal {
        totalSupply = totalSupply.add(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(address(0), to, value);
    }

    function _burn(address from, uint value) internal {
        balanceOf[from] = balanceOf[from].sub(value);
        totalSupply = totalSupply.sub(value);
        emit Transfer(from, address(0), value);
    }

    function _approve(address owner, address spender, uint value) private {
        allowance[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _transfer(address from, address to, uint value) private {
        balanceOf[from] = balanceOf[from].sub(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(from, to, value);
    }

    function approve(address spender, uint value) external returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transfer(address to, uint value) external returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function transferFrom(address from, address to, uint value) external returns (bool) {
        if (allowance[from][msg.sender] != uint(-1)) {
            allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
        }
        _transfer(from, to, value);
        return true;
    }

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
        require(deadline >= block.timestamp, 'UniswapV2: EXPIRED');
        bytes32 digest = keccak256(
            abi.encodePacked(
                '\x19\x01',
                DOMAIN_SEPARATOR,
                keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        require(recoveredAddress != address(0) && recoveredAddress == owner, 'UniswapV2: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}

// File: contracts/libraries/Math.sol

pragma solidity =0.5.16;

// a library for performing various math operations

library Math {
    function min(uint x, uint y) internal pure returns (uint z) {
        z = x < y ? x : y;
    }

    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    function sqrt(uint y) internal pure returns (uint z) {
        if (y > 3) {
            z = y;
            uint x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}

// File: contracts/libraries/UQ112x112.sol

pragma solidity =0.5.16;

// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))

// range: [0, 2**112 - 1]
// resolution: 1 / 2**112

library UQ112x112 {
    uint224 constant Q112 = 2**112;

    // encode a uint112 as a UQ112x112
    function encode(uint112 y) internal pure returns (uint224 z) {
        z = uint224(y) * Q112; // never overflows
    }

    // divide a UQ112x112 by a uint112, returning a UQ112x112
    function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
        z = x / uint224(y);
    }
}

// File: contracts/interfaces/IERC20.sol

pragma solidity >=0.5.0;

interface IERC20 {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);
}

// File: contracts/interfaces/IUniswapV2Factory.sol

pragma solidity >=0.5.0;

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

// File: contracts/interfaces/IUniswapV2Callee.sol

pragma solidity >=0.5.0;

interface IUniswapV2Callee {
    function uniswapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external;
}

// File: contracts/UniswapV2Pair.sol

pragma solidity =0.5.16;








contract UniswapV2Pair is IUniswapV2Pair, UniswapV2ERC20 {
    using SafeMath  for uint;
    using UQ112x112 for uint224;

    uint public constant MINIMUM_LIQUIDITY = 10**3;
    bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));

    address public factory;
    address public token0;
    address public token1;

    uint112 private reserve0;           // uses single storage slot, accessible via getReserves
    uint112 private reserve1;           // uses single storage slot, accessible via getReserves
    uint32  private blockTimestampLast; // uses single storage slot, accessible via getReserves

    uint public price0CumulativeLast;
    uint public price1CumulativeLast;
    uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event

    uint private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, 'UniswapV2: LOCKED');
        unlocked = 0;
        _;
        unlocked = 1;
    }

    function getReserves() public view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {
        _reserve0 = reserve0;
        _reserve1 = reserve1;
        _blockTimestampLast = blockTimestampLast;
    }

    function _safeTransfer(address token, address to, uint value) private {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'UniswapV2: TRANSFER_FAILED');
    }

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    constructor() public {
        factory = msg.sender;
    }

    // called once by the factory at time of deployment
    function initialize(address _token0, address _token1) external {
        require(msg.sender == factory, 'UniswapV2: FORBIDDEN'); // sufficient check
        token0 = _token0;
        token1 = _token1;
    }

    // update reserves and, on the first call per block, price accumulators
    function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {
        require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'UniswapV2: OVERFLOW');
        uint32 blockTimestamp = uint32(block.timestamp % 2**32);
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
        if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
            // * never overflows, and + overflow is desired
            price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
            price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
        }
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        blockTimestampLast = blockTimestamp;
        emit Sync(reserve0, reserve1);
    }

    // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
        address feeTo = IUniswapV2Factory(factory).feeTo();
        feeOn = feeTo != address(0);
        uint _kLast = kLast; // gas savings
        if (feeOn) {
            if (_kLast != 0) {
                uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
                uint rootKLast = Math.sqrt(_kLast);
                if (rootK > rootKLast) {
                    uint numerator = totalSupply.mul(rootK.sub(rootKLast));
                    uint denominator = rootK.mul(5).add(rootKLast);
                    uint liquidity = numerator / denominator;
                    if (liquidity > 0) _mint(feeTo, liquidity);
                }
            }
        } else if (_kLast != 0) {
            kLast = 0;
        }
    }

    // this low-level function should be called from a contract which performs important safety checks
    function mint(address to) external lock returns (uint liquidity) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        uint balance0 = IERC20(token0).balanceOf(address(this));
        uint balance1 = IERC20(token1).balanceOf(address(this));
        uint amount0 = balance0.sub(_reserve0);
        uint amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
           _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
        } else {
            liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
        }
        require(liquidity > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_MINTED');
        _mint(to, liquidity);

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Mint(msg.sender, amount0, amount1);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function burn(address to) external lock returns (uint amount0, uint amount1) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        address _token0 = token0;                                // gas savings
        address _token1 = token1;                                // gas savings
        uint balance0 = IERC20(_token0).balanceOf(address(this));
        uint balance1 = IERC20(_token1).balanceOf(address(this));
        uint liquidity = balanceOf[address(this)];

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
        amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
        require(amount0 > 0 && amount1 > 0, 'UniswapV2: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IERC20(_token0).balanceOf(address(this));
        balance1 = IERC20(_token1).balanceOf(address(this));

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Burn(msg.sender, amount0, amount1, to);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock {
        require(amount0Out > 0 || amount1Out > 0, 'UniswapV2: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'UniswapV2: INSUFFICIENT_LIQUIDITY');

        uint balance0;
        uint balance1;
        { // scope for _token{0,1}, avoids stack too deep errors
        address _token0 = token0;
        address _token1 = token1;
        require(to != _token0 && to != _token1, 'UniswapV2: INVALID_TO');
        if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens
        if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens
        if (data.length > 0) IUniswapV2Callee(to).uniswapV2Call(msg.sender, amount0Out, amount1Out, data);
        balance0 = IERC20(_token0).balanceOf(address(this));
        balance1 = IERC20(_token1).balanceOf(address(this));
        }
        uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
        uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
        require(amount0In > 0 || amount1In > 0, 'UniswapV2: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
        uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));
        uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));
        require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'UniswapV2: K');
        }

        _update(balance0, balance1, _reserve0, _reserve1);
        emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
    }

    // force balances to match reserves
    function skim(address to) external lock {
        address _token0 = token0; // gas savings
        address _token1 = token1; // gas savings
        _safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0));
        _safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1));
    }

    // force reserves to match balances
    function sync() external lock {
        _update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1);
    }
}

/**

SAITAMA V2

*/

pragma solidity ^0.8.14;

// SPDX-License-Identifier: Unlicensed

interface IERC20 {

    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);
}



/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */

library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

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

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


/**
 * @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) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

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

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

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

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

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

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

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

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

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

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    uint256 private _lockTime;

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
    * @dev Leaves the contract without owner. It will not be possible to call
    * `onlyOwner` functions anymore. Can only be called by the current owner.
    *
    * NOTE: Renouncing ownership will leave the contract without an owner,
    * thereby removing any functionality that is only available to the owner.
    */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}
// pragma solidity >=0.5.0;

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}


// pragma solidity >=0.5.0;

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

// pragma solidity >=0.6.2;

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

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

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


// pragma solidity >=0.6.2;

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}


//    SAITAMA V2

contract SAITAMA is Context, IERC20, Ownable {
    using SafeMath for uint256;
    using Address for address;


    struct RValuesStruct {
        uint256 rAmount;
        uint256 rTransferAmount;
        uint256 rReflectionFee;
        uint256 rBurnFee;
        uint256 rmarketingTokenFee;
        uint256 rMarketingETHFee;
    }

    struct TValuesStruct {
        uint256 tTransferAmount;
        uint256 tReflectionFee;
        uint256 tBurnFee;
        uint256 tmarketingTokenFee;
        uint256 tMarketingETHFee;
    }

    struct ValuesStruct {
        uint256 rAmount;
        uint256 rTransferAmount;
        uint256 rReflectionFee;
        uint256 rBurnFee;
        uint256 rmarketingTokenFee;
        uint256 rMarketingETHFee;
        uint256 tTransferAmount;
        uint256 tReflectionFee;
        uint256 tBurnFee;
        uint256 tmarketingTokenFee;
        uint256 tMarketingETHFee;
    }

    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;

    mapping (address => bool) private _isExcludedFromFee;

    mapping (address => bool) private _isExcluded;
    address[] private _excluded;

    uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal = 100 * 10**9 * 10**9;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tReflectionFeeTotal;
    uint256 private _tBurnFeeTotal;

    string private _name = "SAITAMA";
    string private _symbol = "SAITAMA";
    uint8 private _decimals = 9;

    uint256 public _reflectionFee = 1;

    uint256 public _burnFee = 1;

    uint256 public _marketingTokenFee = 1;

    uint256 public _marketingETHFee = 1;

    address public marketingTokenFeeWallet = 0xb3a50a36f988a1D44c248a042A068F822A5FaA29;
    address public marketingETHFeeWallet = 0xb3a50a36f988a1D44c248a042A068F822A5FaA29;

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;

    bool inMarketingEthSwap = false;
    bool public _marketingConverttoETH = true;
    bool public _tradingEnabled = false;
    
    uint256 public _maxTxAmount = 100 * 10**6 * 10**9;
    uint256 private _numTokensSwapToETHForMarketing = 40 * 10**6 * 10**9;

    event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
 
    modifier lockTheSwap {
        inMarketingEthSwap = true;
        _;
        inMarketingEthSwap = false;
    }

    constructor () {
        _rOwned[_msgSender()] = _rTotal;
 
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);  // Uniswap V2
        // Create a uniswap pair for this new token
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
        .createPair(address(this), _uniswapV2Router.WETH());

        // set the rest of the contract variables
        uniswapV2Router = _uniswapV2Router;

        //exclude owner and this contract from fee
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[account]);
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    function isExcludedFromReward(address account) public view returns (bool) {
        return _isExcluded[account];
    }

    function totalReflectionFees() public view returns (uint256) {
        return _tReflectionFeeTotal;
    }

    function totalBurnFees() public view returns (uint256) {
        return _tBurnFeeTotal;
    }

    /**
     * @dev Returns the Number of tokens in contract that are needed to be reached before swapping to ETH and sending to Marketing Wallet. .
     */
    function numTokensSwapToETHForMarketing() public view returns (uint256) {
        return _numTokensSwapToETHForMarketing;
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            uint256 rAmount = _getValues(tAmount).rAmount;
            return rAmount;
        } else {
            uint256 rTransferAmount = _getValues(tAmount).rTransferAmount;
            return rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  _getRate();
        return rAmount.div(currentRate);
    }

    function excludeFromReward(address account) public onlyOwner() {
        require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
        require(!_isExcluded[account], "Account already excluded");
        require(_excluded.length < 100, "Excluded list is too long");
        if(_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    //to recieve ETH from uniswapV2Router when swaping
    receive() external payable {}

    function _distributeFee(uint256 rReflectionFee, uint256 rBurnFee, uint256 rmarketingTokenFee, uint256 tReflectionFee, uint256 tBurnFee, uint256 tmarketingTokenFee) private {
        _rTotal = _rTotal.sub(rReflectionFee).sub(rBurnFee);
        _tReflectionFeeTotal = _tReflectionFeeTotal.add(tReflectionFee);
        _tTotal = _tTotal.sub(tBurnFee);
        _tBurnFeeTotal = _tBurnFeeTotal.add(tBurnFee);

        _rOwned[marketingTokenFeeWallet] = _rOwned[marketingTokenFeeWallet].add(rmarketingTokenFee);
        if (_isExcluded[marketingTokenFeeWallet]) {
            _tOwned[marketingTokenFeeWallet] = _tOwned[marketingTokenFeeWallet].add(tmarketingTokenFee);
        }
    }

    function _getValues(uint256 tAmount) private view returns (ValuesStruct memory) {
        TValuesStruct memory tvs = _getTValues(tAmount);
        RValuesStruct memory rvs = _getRValues(tAmount, tvs.tReflectionFee, tvs.tBurnFee, tvs.tmarketingTokenFee, tvs.tMarketingETHFee, _getRate());

        return ValuesStruct(
            rvs.rAmount,
            rvs.rTransferAmount,
            rvs.rReflectionFee,
            rvs.rBurnFee,
            rvs.rmarketingTokenFee,
            rvs.rMarketingETHFee,
            tvs.tTransferAmount,
            tvs.tReflectionFee,
            tvs.tBurnFee,
            tvs.tmarketingTokenFee,
            tvs.tMarketingETHFee
        );
    }

    function _getTValues(uint256 tAmount) private view returns (TValuesStruct memory) {
        uint256 tReflectionFee = calculateReflectionFee(tAmount);
        uint256 tBurnFee = calculateBurnFee(tAmount);
        uint256 tmarketingTokenFee = calculatemarketingTokenFee(tAmount);
        uint256 tMarketingETHFee = calculateMarketingETHFee(tAmount);
        uint256 tTransferAmount = tAmount.sub(tReflectionFee).sub(tBurnFee).sub(tmarketingTokenFee).sub(tMarketingETHFee);
        return TValuesStruct(tTransferAmount, tReflectionFee, tBurnFee, tmarketingTokenFee, tMarketingETHFee);
    }

    function _getRValues(uint256 tAmount, uint256 tReflectionFee, uint256 tBurnFee, uint256 tmarketingTokenFee, uint256 tMarketingETHFee, uint256 currentRate) private pure returns (RValuesStruct memory) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rReflectionFee = tReflectionFee.mul(currentRate);
        uint256 rBurnFee = tBurnFee.mul(currentRate);
        uint256 rmarketingTokenFee = tmarketingTokenFee.mul(currentRate);
        uint256 rMarketingETHFee = tMarketingETHFee.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rReflectionFee).sub(rMarketingETHFee).sub(rBurnFee).sub(rmarketingTokenFee);
        return RValuesStruct(rAmount, rTransferAmount, rReflectionFee, rBurnFee, rmarketingTokenFee, rMarketingETHFee);
    }

    function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;
        for (uint256 i = 0; i < _excluded.length; i++) {
            if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
            rSupply = rSupply.sub(_rOwned[_excluded[i]]);
            tSupply = tSupply.sub(_tOwned[_excluded[i]]);
        }
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }

    function _takeMarketingETHFee(uint256 rMarketingETHFee, uint256 tMarketingETHFee) private {
        _rOwned[address(this)] = _rOwned[address(this)].add(rMarketingETHFee);
        if(_isExcluded[address(this)])
            _tOwned[address(this)] = _tOwned[address(this)].add(tMarketingETHFee);
    }

    function calculateReflectionFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_reflectionFee).div(
            10**2
        );
    }

    function calculateBurnFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_burnFee).div(
            10**2
        );
    }

    function calculatemarketingTokenFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_marketingTokenFee).div(
            10**2
        );
    }

    function calculateMarketingETHFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_marketingETHFee).div(
            10**2
        );
    }

    function removeAllFee() private {
        _reflectionFee = 0;
        _marketingETHFee = 0;
        _burnFee = 0;
        _marketingTokenFee = 0;
    }

    function restoreAllFee() private {
        _reflectionFee = 1;
        _marketingETHFee = 1;
        _marketingTokenFee = 1;
        _burnFee = 1;
	}

    function isExcludedFromFee(address account) public view returns(bool) {
        return _isExcludedFromFee[account];
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
		_allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        
        // block trading until owner has added liquidity and enabled trading
        if(!_tradingEnabled && from != owner()) {
            revert("Trading not yet enabled!");
        }
        
        // is the token balance of this contract address over the min number of
        // tokens that we need to initiate a swaptoEth lock?
        // also, don't get caught in a circular liquidity event.
        // also, don't SwapMarketingAndSendETH if sender is uniswap pair.
        uint256 contractTokenBalance = balanceOf(address(this));
        bool overMinTokenBalance = contractTokenBalance >= _numTokensSwapToETHForMarketing;
        if (
            overMinTokenBalance &&
            !inMarketingEthSwap &&
            from != uniswapV2Pair &&
            _marketingConverttoETH
        ) {
            contractTokenBalance = _numTokensSwapToETHForMarketing;
            //Perform a Swap of Token for ETH Portion of Marketing Fees
            swapMarketingAndSendEth(contractTokenBalance);
        }

        //transfer amount, it will take tax, burn, liquidity fee
        _tokenTransfer(from,to,amount);

    }

     function swapMarketingAndSendEth(uint256 tokenAmount) private lockTheSwap {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            marketingETHFeeWallet,
            block.timestamp
        );
    }

    //this method is responsible for taking all fee, if takeFee is true
    function _tokenTransfer(address sender, address recipient, uint256 amount) private {
        if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){
            removeAllFee();
        }
        else{
            require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
        }

        ValuesStruct memory vs = _getValues(amount);
        _takeMarketingETHFee(vs.rMarketingETHFee, vs.tMarketingETHFee);
        _distributeFee(vs.rReflectionFee, vs.rBurnFee, vs.rmarketingTokenFee, vs.tReflectionFee, vs.tBurnFee, vs.tmarketingTokenFee);

        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount, vs);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, vs);
        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferStandard(sender, recipient, vs);
        } else if (_isExcluded[sender] && _isExcluded[recipient]) {
            _transferBothExcluded(sender, recipient, amount, vs);
        }

        if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient])
            restoreAllFee();
    }

    function _transferStandard(address sender, address recipient, ValuesStruct memory vs) private {
        _rOwned[sender] = _rOwned[sender].sub(vs.rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount);
        emit Transfer(sender, recipient, vs.tTransferAmount);
    }

    function _transferToExcluded(address sender, address recipient, ValuesStruct memory vs) private {
        _rOwned[sender] = _rOwned[sender].sub(vs.rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(vs.tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount);
        emit Transfer(sender, recipient, vs.tTransferAmount);
    }

    function _transferFromExcluded(address sender, address recipient, uint256 tAmount, ValuesStruct memory vs) private {
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(vs.rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount);
        emit Transfer(sender, recipient, vs.tTransferAmount);
    }

    function _transferBothExcluded(address sender, address recipient, uint256 tAmount, ValuesStruct memory vs) private {
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(vs.rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(vs.tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(vs.rTransferAmount);
        emit Transfer(sender, recipient, vs.tTransferAmount);
    }

    function excludeFromFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = true;
    }

    function includeInFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = false;
    }

    function enableAllFees() external onlyOwner() {
        _reflectionFee = 1;
        _burnFee = 1;
        _marketingTokenFee = 1;
        _marketingETHFee = 1;
        _marketingConverttoETH = true;
    }

    function disableAllFees() external onlyOwner() {
        _reflectionFee = 0;
        _burnFee = 0;
        _marketingTokenFee = 0;
        _marketingETHFee = 0;
        _marketingConverttoETH = false;
    }

    function setMarketingETHWallet(address newWallet) external onlyOwner() {
        marketingETHFeeWallet = newWallet;
    }

    function setMarketingTokenWallet(address newWallet) external onlyOwner() {
        marketingTokenFeeWallet = newWallet;
    }

    function setMaxTxAmount(uint256 maxAmountInTokensWithDecimals) external onlyOwner() {
        require(maxAmountInTokensWithDecimals > 100 * 10**6 * 10**9, "Cannot set transaction amount less than 0.1 percent of initial Total Supply!");
        _maxTxAmount = maxAmountInTokensWithDecimals;
    }

    function enableTrading() public onlyOwner {
        require(!_tradingEnabled, "Trading already enabled!");
        _tradingEnabled = true;
    }

    function setmarketingConverttoETH(bool _enabled) public onlyOwner {
        _marketingConverttoETH = _enabled;
    }

    // Number of Tokens to Accrue before Selling To Add to Marketing
	function setnumTokensSwapToETHForMarketing(uint256 tokenAmount) external onlyOwner() {
       _numTokensSwapToETHForMarketing = tokenAmount;
    }

    /**
     * @dev Function to recover any ETH sent to Contract by Mistake.
    */	
    function recoverETHFromContract(uint256 weiAmount) external onlyOwner{
        require(address(this).balance >= weiAmount, "insufficient ETH balance");
        payable(owner()).transfer(weiAmount);
    }
       
    /**
     * @dev Function to recover any ERC20 Tokens sent to Contract by Mistake.
    */
    function recoverAnyERC20TokensFromContract(address _tokenAddr, address _to, uint _amount) public onlyOwner {
        IERC20(_tokenAddr).transfer(_to, _amount);
    }

}