Goldstr

{{
  "language": "Solidity",
  "sources": {
    "src/Goldstr.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/*
Gold Strategy - XAUt/acc
https://x.com/goldstrgy/
https://www.goldstrgy.xyz/
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*/

import {ERC20} from "solady/tokens/ERC20.sol";
import {Ownable} from "solady/auth/Ownable.sol";
import {IHooks} from "@uniswap/v4-core/src/interfaces/IHooks.sol";
import {Currency} from "@uniswap/v4-core/src/types/Currency.sol";
import {PoolKey} from "@uniswap/v4-core/src/types/PoolKey.sol";
import {PoolId, PoolIdLibrary} from "@uniswap/v4-core/src/types/PoolId.sol";
import {IV4Router} from "@uniswap/v4-periphery/src/interfaces/IV4Router.sol";
import {IPositionManager} from "@uniswap/v4-periphery/src/interfaces/IPositionManager.sol";
import {IPoolManager} from "@uniswap/v4-core/src/interfaces/IPoolManager.sol";
import {StateLibrary} from "@uniswap/v4-core/src/libraries/StateLibrary.sol";
import {Actions} from "@uniswap/v4-periphery/src/libraries/Actions.sol";
import {IAllowanceTransfer} from "permit2/src/interfaces/IAllowanceTransfer.sol";
import {IUniswapV3Pool} from "@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol";

interface IERC20 {
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function approve(address spender, uint256 amount) external returns (bool);
}

interface ISwapRouter02 {
    struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

    struct ExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 amountOut;
        uint256 amountInMaximum;
        uint160 sqrtPriceLimitX96;
    }

    function exactInputSingle(
        ExactInputSingleParams calldata params
    ) external payable returns (uint256 amountOut);

    function exactOutputSingle(
        ExactOutputSingleParams calldata params
    ) external payable returns (uint256 amountIn);
}

interface IUniversalRouter {
    function execute(
        bytes calldata commands,
        bytes[] calldata inputs,
        uint256 deadline
    ) external payable;
}

library Commands {
    uint256 internal constant V4_SWAP = 0x10;
}

contract Goldstr is ERC20, Ownable {
    using StateLibrary for IPoolManager;
    using PoolIdLibrary for PoolKey;

    /* ═══════════════════════════════════════════════════ */
    /*                      CONSTANTS                      */
    /* ═══════════════════════════════════════════════════ */
    
    IPositionManager private immutable POSM;
    IAllowanceTransfer private immutable PERMIT2;
    IUniversalRouter private constant UNIVERSAL_ROUTER = 
        IUniversalRouter(0x66a9893cC07D91D95644AEDD05D03f95e1dBA8Af);
    IERC20 private constant XAUT = IERC20(0x68749665FF8D2d112Fa859AA293F07A622782F38);
    ISwapRouter02 private constant SWAP_ROUTER_02 = ISwapRouter02(0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45);
    address private constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    address private constant XAUT_WETH_POOL = 0x3E04d683f7187BC0293e05006203AcCB29311767;
    uint24 private constant POOL_FEE = 10000; // 1%
    uint256 public constant MAX_SUPPLY = 1_000_000_000 * 1e18;
    address public constant DEADADDRESS = 0x000000000000000000000000000000000000dEaD;

    /* ═══════════════════════════════════════════════════ */
    /*                   STATE VARIABLES                   */
    /* ═══════════════════════════════════════════════════ */

    // Uniswap V4 Pool variables
    bool public loadingLiquidity;
    bool public poolInitialized;
    PoolKey public poolKey;
    PoolId public poolId;
    int24 public tickLower;
    int24 public tickUpper;
    uint256 public positionTokenId;
    
    // Fee tracking
    uint256 public currentFees;

    struct XAUTOrder {
        uint256 amount;           // Amount of XAUT tokens
        uint256 buyPriceX96;      // Price at purchase (sqrtPriceX96)
        uint256 timestamp;        // When the order was created
        bool active;              // Whether the order is still active
    }

    uint256 public nextOrderId;
    mapping(uint256 => XAUTOrder) public XAUTOrders;

    /* ═══════════════════════════════════════════════════ */
    /*                        EVENTS                       */
    /* ═══════════════════════════════════════════════════ */

    event XAUTBought(
        uint256 indexed orderId,
        uint256 amountXAUT,
        uint256 ethSpent,
        uint256 buyPriceX96
    );

    event XAUTSold(
        uint256 indexed orderId,
        uint256 amountXAUT,
        uint256 ethReceived,
        uint256 sellPriceX96,
        uint256 buyPriceX96
    );

    constructor(
        IPositionManager _posm,
        IAllowanceTransfer _permit2
    ) {
        POSM = _posm;
        PERMIT2 = _permit2;
        _initializeOwner(msg.sender);
        _mint(address(this), MAX_SUPPLY);
    }

    function symbol() public pure override returns (string memory) { 
        return "GSTR";     
    }

    function name() public pure override returns (string memory)   { 
        return "Gold Strategy"; 
    }


    /// @notice Load initial liquidity into the pool
    /// @dev Must be called after contract deployment
    function goldMine() external onlyOwner {
        loadingLiquidity = true;

        // Create the pool with ETH (currency0) and TOKEN (currency1)
        Currency currency0 = Currency.wrap(address(0)); // ETH
        Currency currency1 = Currency.wrap(address(this)); // TOKEN

        uint24 lpFee = 100000; // 10% fee
        int24 tickSpacing = 200;

        uint256 token0Amount = 0; // 0 ETH
        uint256 token1Amount = MAX_SUPPLY;

        uint160 startingPrice = 2045645379722529521098596513701367;
        tickLower = int24(-887200);
        tickUpper = int24(203000);

        PoolKey memory key = PoolKey(
            currency0,
            currency1,
            lpFee,
            tickSpacing,
            IHooks(address(0))
        );

        // Store pool information
        poolKey = key;
        poolId = key.toId();
        bytes memory hookData = new bytes(0);

        uint128 liquidity = 39095916497508424169487;

        (
            bytes memory actions,
            bytes[] memory mintParams
        ) = _mintLiquidityParams(
                key,
                tickLower,
                tickUpper,
                liquidity,
                token0Amount,
                token1Amount,
                address(this),
                hookData
            );

        bytes[] memory params = new bytes[](2);

        params[0] = abi.encodeWithSelector(
            POSM.initializePool.selector,
            key,
            startingPrice,
            hookData
        );

        params[1] = abi.encodeWithSelector(
            POSM.modifyLiquidities.selector,
            abi.encode(actions, mintParams),
            block.timestamp + 60
        );

        uint256 valueToPass = token0Amount;

        // Approve Permit2 to spend our tokens
        _approve(address(this), address(PERMIT2), type(uint256).max);

        PERMIT2.approve(
            address(this),
            address(POSM),
            type(uint160).max,
            type(uint48).max
        );

        // Get the next token ID before minting
        positionTokenId = POSM.nextTokenId();

        POSM.multicall{value: valueToPass}(params);

        loadingLiquidity = false;
        poolInitialized = true;
        poolKey = key;
        poolId = key.toId();
    }

    /// @notice Renounces ownership of the contract, making it uncontrollable
    /// @dev This is irreversible - use with extreme caution
    function renounceOwnership() public payable virtual override onlyOwner {
        _setOwner(address(0));
    }

    /// @notice Creates parameters for minting liquidity in Uniswap V4
    function _mintLiquidityParams(
        PoolKey memory key,
        int24 _tickLower,
        int24 _tickUpper,
        uint256 liquidity,
        uint256 amount0Max,
        uint256 amount1Max,
        address recipient,
        bytes memory hookData
    ) internal pure returns (bytes memory, bytes[] memory) {
        bytes memory actions = abi.encodePacked(
            uint8(Actions.MINT_POSITION),
            uint8(Actions.SETTLE_PAIR)
        );

        bytes[] memory params = new bytes[](2);
        params[0] = abi.encode(
            key,
            _tickLower,
            _tickUpper,
            liquidity,
            amount0Max,
            amount1Max,
            recipient,
            hookData
        );
        params[1] = abi.encode(key.currency0, key.currency1);
        return (actions, params);
    }

    /// @notice Buy XAUT tokens using all contract's ETH balance via Uniswap V3
    /// @dev Swaps all available ETH for XAUT on the XAUT/WETH pool with 1% fee
    function buyXAUT() external {
        // Use entire ETH balance of the contract
        uint256 amountIn = address(this).balance;
        require(amountIn > 0, "No ETH available in contract");

        // Record XAUT balance before swap
        uint256 XAUTBalanceBefore = XAUT.balanceOf(address(this));

        // Execute ETH -> XAUT swap on Uniswap V3
        // Minimum output requirement: 1 XAUT token
        uint256 minAmountOut = 1e18;
        uint256 tokensReceived = SWAP_ROUTER_02.exactInputSingle{value: amountIn}(
            ISwapRouter02.ExactInputSingleParams({
                tokenIn: WETH,
                tokenOut: address(XAUT),
                fee: POOL_FEE,
                recipient: address(this),
                amountIn: amountIn,
                amountOutMinimum: minAmountOut,
                sqrtPriceLimitX96: 0
            })
        );

        // Verify minimum XAUT tokens were received
        uint256 XAUTBalanceAfter = XAUT.balanceOf(address(this));
        require(
            XAUTBalanceAfter >= XAUTBalanceBefore + minAmountOut,
            "Insufficient XAUT received (minimum 1 XAUT)"
        );

        // Create sell order if balance >= 1 XAUT
        if (XAUTBalanceAfter >= 1e18) {
            // Record current pool price
            (uint160 sqrtPriceX96, , , , , , ) = IUniswapV3Pool(XAUT_WETH_POOL).slot0();

            // Store order details
            XAUTOrders[nextOrderId] = XAUTOrder({
                amount: XAUTBalanceAfter,
                buyPriceX96: uint256(sqrtPriceX96),
                timestamp: block.timestamp,
                active: true
            });

            emit XAUTBought(
                nextOrderId,
                XAUTBalanceAfter,
                amountIn,
                uint256(sqrtPriceX96)
            );

            nextOrderId++;
        }
    }

    /// @notice Emergency function to withdraw all ETH and XAUT tokens from the contract
    /// @dev Only callable by owner. Exists in case of a critical issue where tokens get stuck in the contract
    function emergencyWithdraw() external onlyOwner {   
        // Withdraw ETH balance
        uint256 contractBalance = address(this).balance;
        if (contractBalance > 0) {
            (bool success, ) = payable(owner()).call{value: contractBalance}("");
            require(success, "Emergency ETH withdrawal failed");
        }
        
        // Withdraw XAUT token balance
        uint256 XAUTBalance = XAUT.balanceOf(address(this));
        if (XAUTBalance > 0) {
            bool XAUTSuccess = XAUT.transfer(owner(), XAUTBalance);
            require(XAUTSuccess, "Emergency XAUT withdrawal failed");
        }
        
        require(contractBalance > 0 || XAUTBalance > 0, "No ETH or XAUT to withdraw");
    }

    /// @notice Sell XAUT tokens if price has +10% value since purchase
    /// @dev Checks if current price >= 110% of purchase price, then sells and burns
    /// @param orderId The ID of the order to check and potentially sell
    function sellXAUT(uint256 orderId) external {
        XAUTOrder storage order = XAUTOrders[orderId];
        
        require(order.active, "Order is not active");
        require(order.amount > 0, "Order amount is zero");

        // Fetch current pool price
        (uint160 currentSqrtPriceX96, , , , , , ) = IUniswapV3Pool(XAUT_WETH_POOL).slot0();

        uint256 sqrt110PercentX96 = 83076749736557242056487941;
        uint256 targetSqrtPriceX96 = (order.buyPriceX96 * sqrt110PercentX96) >> 96;
        
        require(
            uint256(currentSqrtPriceX96) >= targetSqrtPriceX96,
            "Price has not increased by 10% yet"
        );

        // Deactivate order
        order.active = false;

        // Record ETH balance before swap
        uint256 ethBalanceBefore = address(this).balance;

        // Approve SWAP_ROUTER_02 to spend XAUT tokens
        XAUT.approve(address(SWAP_ROUTER_02), order.amount);

        // Execute XAUT -> ETH swap on Uniswap V3
        SWAP_ROUTER_02.exactInputSingle(
            ISwapRouter02.ExactInputSingleParams({
                tokenIn: address(XAUT),
                tokenOut: WETH,
                fee: POOL_FEE,
                recipient: address(this),
                amountIn: order.amount,
                amountOutMinimum: 0,
                sqrtPriceLimitX96: 0
            })
        );

        // Calculate ETH proceeds from sale
        uint256 ethBalanceAfter = address(this).balance;
        uint256 ethReceived = ethBalanceAfter - ethBalanceBefore;

        emit XAUTSold(
            orderId,
            order.amount,
            ethReceived,
            uint256(currentSqrtPriceX96),
            order.buyPriceX96
        );

        // Buy and burn strategy tokens with ETH proceeds
        if (ethReceived > 0) {
            buyAndBurnToken(ethReceived);
        }
    }

    /// @notice Get current XAUT price from Uniswap V3 pool
    /// @return sqrtPriceX96 Current sqrt price
    function getCurrentXAUTPrice() external view returns (uint160 sqrtPriceX96) {
        (sqrtPriceX96, , , , , , ) = IUniswapV3Pool(XAUT_WETH_POOL).slot0();
        return sqrtPriceX96;
    }

    /// @notice Get accumulated fees in the pool using StateLibrary
    /// @param _poolKey The pool key to check fees for
    /// @return fees0 Global fee growth for token0 (ETH)
    /// @return fees1 Global fee growth for token1 (Our token)
    function getFees(
        PoolKey memory _poolKey
    ) external view returns (uint256 fees0, uint256 fees1) {
        // Use our contract's position token ID and tick range
        uint256 tokenId = positionTokenId;
        int24 _tickLower = tickLower;
        int24 _tickUpper = tickUpper;

        // Get pool manager
        IPoolManager poolManager = POSM.poolManager();
        PoolId _poolId = _poolKey.toId();

        // Get position info from pool manager
        // The position is owned by POSM (position manager) with tokenId as salt
        (
            uint128 liquidity,
            uint256 feeGrowthInside0LastX128,
            uint256 feeGrowthInside1LastX128
        ) = poolManager.getPositionInfo(
                _poolId,
                address(POSM),
                _tickLower,
                _tickUpper,
                bytes32(tokenId)
            );

        // Get current fee growth inside the position range using StateLibrary
        (
            uint256 feeGrowthInside0X128,
            uint256 feeGrowthInside1X128
        ) = poolManager.getFeeGrowthInside(_poolId, _tickLower, _tickUpper);

        // Calculate fees owed using the same formula as Uniswap
        fees0 =
            ((feeGrowthInside0X128 - feeGrowthInside0LastX128) * liquidity) /
            (1 << 128);
        fees1 =
            ((feeGrowthInside1X128 - feeGrowthInside1LastX128) * liquidity) /
            (1 << 128);

        return (fees0, fees1);
    }

    function collectFees() external returns (uint256 ethFees, uint256 tokenFees) {
        (ethFees, tokenFees) = this.getFees(poolKey);

        // If no fees, no need to collect
        if (ethFees == 0 && tokenFees == 0) {
            return (0, 0);
        }

        // In V4, we collect fees by decreasing liquidity and collecting the fees
        // from our LP position since we are the LP provider
        // Use our contract's position token ID directly
        uint256 tokenId = positionTokenId;

        // Use DECREASE_LIQUIDITY with 0 liquidity to collect fees only
        bytes memory actions = abi.encodePacked(
            uint8(Actions.DECREASE_LIQUIDITY),
            uint8(Actions.TAKE_PAIR)
        );

        bytes[] memory params = new bytes[](2);

        // Parameters for DECREASE_LIQUIDITY (collect fees without removing liquidity)
        params[0] = abi.encode(
            tokenId,
            0, // liquidityDelta = 0 (don't remove liquidity, just collect fees)
            0, // amount0Min = 0
            0, // amount1Min = 0
            "" // hookData
        );

        // Parameters for TAKE_PAIR - transfer fees to this contract
        params[1] = abi.encode(
            poolKey.currency0, // ETH
            poolKey.currency1, // Our token (this contract)
            address(this) // recipient
        );

        // Execute the fee collection through Position Manager
        POSM.modifyLiquidities(
            abi.encode(actions, params),
            block.timestamp + 60
        );

        // Distribute ETH fees: 90% to contract, 10% to owner
        if (ethFees > 0) {
            uint256 ownerShare = (ethFees * 10) / 100; // 10%
            uint256 contractShare = ethFees - ownerShare; // 90%
            
            // Send 10% to owner
            if (ownerShare > 0) {
                (bool success, ) = payable(owner()).call{value: ownerShare}("");
                require(success, "Transfer to owner failed");
            }
            
            // 90% stays in the contract (contractShare remains in address(this))
            currentFees += contractShare;
        }

        // Send 100% of token fees to owner
        if (tokenFees > 0) {
            _transfer(address(this), owner(), tokenFees);
        }

        return (ethFees, tokenFees);
    }

    /* ═══════════════════════════════════════════════════ */
    /*                  INTERNAL FUNCTIONS                 */
    /* ═══════════════════════════════════════════════════ */

    /// @notice Buys strategy tokens with ETH and burns them via Universal Router V4
    /// @param amountIn Amount of ETH to use for buying and burning tokens
    function buyAndBurnToken(uint256 amountIn) internal {
        if (amountIn == 0) return;
        require(amountIn <= address(this).balance, "Insufficient contract balance");

        // Exit if pool not initialized
        if (!poolInitialized) {
            return;
        }

        uint256 minTokensOut = (amountIn * 9) / 10; // 10% slippage tolerance

        // Record token balance before swap
        uint256 contractBalanceBefore = balanceOf(address(this));

        uint128 safeAmountIn = uint128(amountIn);
        uint128 safeMinTokensOut = uint128(minTokensOut);
        
        _swapExactInputSingleV4(
            poolKey,
            safeAmountIn,
            safeMinTokensOut
        );

        uint256 contractBalanceAfter = balanceOf(address(this));
        uint256 tokensReceived = contractBalanceAfter - contractBalanceBefore;

        // Burn received tokens
        if (tokensReceived > 0) {
            _transfer(address(this), DEADADDRESS, tokensReceived);
        }
    }

    /// @notice Executes a V4 swap via Universal Router
    function _swapExactInputSingleV4(
        PoolKey memory key,
        uint128 amountIn,
        uint128 minAmountOut
    ) internal returns (uint256 amountOut) {
        // Encode the Universal Router command
        bytes memory commands = abi.encodePacked(uint8(Commands.V4_SWAP));
        bytes[] memory inputs = new bytes[](1);

        // Encode V4Router actions
        bytes memory actions = abi.encodePacked(
            uint8(Actions.SWAP_EXACT_IN_SINGLE),
            uint8(Actions.SETTLE_ALL),
            uint8(Actions.TAKE_ALL)
        );

        // Prepare parameters for each action
        bytes[] memory params = new bytes[](3);
        params[0] = abi.encode(
            IV4Router.ExactInputSingleParams({
                poolKey: key,
                zeroForOne: true, // ETH (currency0) -> TOKEN (currency1)
                amountIn: amountIn,
                amountOutMinimum: minAmountOut,
                hookData: ""
            })
        );
        params[1] = abi.encode(key.currency0, amountIn);
        params[2] = abi.encode(key.currency1, minAmountOut);

        // Combine actions and params into inputs
        inputs[0] = abi.encode(actions, params);

        // Execute swap with deadline protection (5 minutes)
        uint256 deadline = block.timestamp + 300;
        UNIVERSAL_ROUTER.execute{value: amountIn}(commands, inputs, deadline);

        // Verify output meets minimum requirement
        amountOut = balanceOf(address(this));
        require(amountOut >= minAmountOut, "Insufficient output amount");

        return amountOut;
    }

    /// @notice Allows the contract to receive ETH
    receive() external payable {}
}"
    },
    "lib/solady/src/tokens/ERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Simple ERC20 + EIP-2612 implementation.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol)
///
/// @dev Note:
/// - The ERC20 standard allows minting and transferring to and from the zero address,
///   minting and transferring zero tokens, as well as self-approvals.
///   For performance, this implementation WILL NOT revert for such actions.
///   Please add any checks with overrides if desired.
/// - The `permit` function uses the ecrecover precompile (0x1).
///
/// If you are overriding:
/// - NEVER violate the ERC20 invariant:
///   the total sum of all balances must be equal to `totalSupply()`.
/// - Check that the overridden function is actually used in the function you want to
///   change the behavior of. Much of the code has been manually inlined for performance.
abstract contract ERC20 {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The total supply has overflowed.
    error TotalSupplyOverflow();

    /// @dev The allowance has overflowed.
    error AllowanceOverflow();

    /// @dev The allowance has underflowed.
    error AllowanceUnderflow();

    /// @dev Insufficient balance.
    error InsufficientBalance();

    /// @dev Insufficient allowance.
    error InsufficientAllowance();

    /// @dev The permit is invalid.
    error InvalidPermit();

    /// @dev The permit has expired.
    error PermitExpired();

    /// @dev The allowance of Permit2 is fixed at infinity.
    error Permit2AllowanceIsFixedAtInfinity();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                           EVENTS                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Emitted when `amount` tokens is transferred from `from` to `to`.
    event Transfer(address indexed from, address indexed to, uint256 amount);

    /// @dev Emitted when `amount` tokens is approved by `owner` to be used by `spender`.
    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /// @dev `keccak256(bytes("Transfer(address,address,uint256)"))`.
    uint256 private constant _TRANSFER_EVENT_SIGNATURE =
        0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;

    /// @dev `keccak256(bytes("Approval(address,address,uint256)"))`.
    uint256 private constant _APPROVAL_EVENT_SIGNATURE =
        0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STORAGE                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The storage slot for the total supply.
    uint256 private constant _TOTAL_SUPPLY_SLOT = 0x05345cdf77eb68f44c;

    /// @dev The balance slot of `owner` is given by:
    /// ```
    ///     mstore(0x0c, _BALANCE_SLOT_SEED)
    ///     mstore(0x00, owner)
    ///     let balanceSlot := keccak256(0x0c, 0x20)
    /// ```
    uint256 private constant _BALANCE_SLOT_SEED = 0x87a211a2;

    /// @dev The allowance slot of (`owner`, `spender`) is given by:
    /// ```
    ///     mstore(0x20, spender)
    ///     mstore(0x0c, _ALLOWANCE_SLOT_SEED)
    ///     mstore(0x00, owner)
    ///     let allowanceSlot := keccak256(0x0c, 0x34)
    /// ```
    uint256 private constant _ALLOWANCE_SLOT_SEED = 0x7f5e9f20;

    /// @dev The nonce slot of `owner` is given by:
    /// ```
    ///     mstore(0x0c, _NONCES_SLOT_SEED)
    ///     mstore(0x00, owner)
    ///     let nonceSlot := keccak256(0x0c, 0x20)
    /// ```
    uint256 private constant _NONCES_SLOT_SEED = 0x38377508;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         CONSTANTS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev `(_NONCES_SLOT_SEED << 16) | 0x1901`.
    uint256 private constant _NONCES_SLOT_SEED_WITH_SIGNATURE_PREFIX = 0x383775081901;

    /// @dev `keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")`.
    bytes32 private constant _DOMAIN_TYPEHASH =
        0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f;

    /// @dev `keccak256("1")`.
    /// If you need to use a different version, override `_versionHash`.
    bytes32 private constant _DEFAULT_VERSION_HASH =
        0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6;

    /// @dev `keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)")`.
    bytes32 private constant _PERMIT_TYPEHASH =
        0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;

    /// @dev The canonical Permit2 address.
    /// For signature-based allowance granting for single transaction ERC20 `transferFrom`.
    /// Enabled by default. To disable, override `_givePermit2InfiniteAllowance()`.
    /// [Github](https://github.com/Uniswap/permit2)
    /// [Etherscan](https://etherscan.io/address/0x000000000022D473030F116dDEE9F6B43aC78BA3)
    address internal constant _PERMIT2 = 0x000000000022D473030F116dDEE9F6B43aC78BA3;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       ERC20 METADATA                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the name of the token.
    function name() public view virtual returns (string memory);

    /// @dev Returns the symbol of the token.
    function symbol() public view virtual returns (string memory);

    /// @dev Returns the decimals places of the token.
    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                           ERC20                            */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the amount of tokens in existence.
    function totalSupply() public view virtual returns (uint256 result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := sload(_TOTAL_SUPPLY_SLOT)
        }
    }

    /// @dev Returns the amount of tokens owned by `owner`.
    function balanceOf(address owner) public view virtual returns (uint256 result) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x0c, _BALANCE_SLOT_SEED)
            mstore(0x00, owner)
            result := sload(keccak256(0x0c, 0x20))
        }
    }

    /// @dev Returns the amount of tokens that `spender` can spend on behalf of `owner`.
    function allowance(address owner, address spender)
        public
        view
        virtual
        returns (uint256 result)
    {
        if (_givePermit2InfiniteAllowance()) {
            if (spender == _PERMIT2) return type(uint256).max;
        }
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x20, spender)
            mstore(0x0c, _ALLOWANCE_SLOT_SEED)
            mstore(0x00, owner)
            result := sload(keccak256(0x0c, 0x34))
        }
    }

    /// @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
    ///
    /// Emits a {Approval} event.
    function approve(address spender, uint256 amount) public virtual returns (bool) {
        if (_givePermit2InfiniteAllowance()) {
            /// @solidity memory-safe-assembly
            assembly {
                // If `spender == _PERMIT2 && amount != type(uint256).max`.
                if iszero(or(xor(shr(96, shl(96, spender)), _PERMIT2), iszero(not(amount)))) {
                    mstore(0x00, 0x3f68539a) // `Permit2AllowanceIsFixedAtInfinity()`.
                    revert(0x1c, 0x04)
                }
            }
        }
        /// @solidity memory-safe-assembly
        assembly {
            // Compute the allowance slot and store the amount.
            mstore(0x20, spender)
            mstore(0x0c, _ALLOWANCE_SLOT_SEED)
            mstore(0x00, caller())
            sstore(keccak256(0x0c, 0x34), amount)
            // Emit the {Approval} event.
            mstore(0x00, amount)
            log3(0x00, 0x20, _APPROVAL_EVENT_SIGNATURE, caller(), shr(96, mload(0x2c)))
        }
        return true;
    }

    /// @dev Transfer `amount` tokens from the caller to `to`.
    ///
    /// Requirements:
    /// - `from` must at least have `amount`.
    ///
    /// Emits a {Transfer} event.
    function transfer(address to, uint256 amount) public virtual returns (bool) {
        _beforeTokenTransfer(msg.sender, to, amount);
        /// @solidity memory-safe-assembly
        assembly {
            // Compute the balance slot and load its value.
            mstore(0x0c, _BALANCE_SLOT_SEED)
            mstore(0x00, caller())
            let fromBalanceSlot := keccak256(0x0c, 0x20)
            let fromBalance := sload(fromBalanceSlot)
            // Revert if insufficient balance.
            if gt(amount, fromBalance) {
                mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`.
                revert(0x1c, 0x04)
            }
            // Subtract and store the updated balance.
            sstore(fromBalanceSlot, sub(fromBalance, amount))
            // Compute the balance slot of `to`.
            mstore(0x00, to)
            let toBalanceSlot := keccak256(0x0c, 0x20)
            // Add and store the updated balance of `to`.
            // Will not overflow because the sum of all user balances
            // cannot exceed the maximum uint256 value.
            sstore(toBalanceSlot, add(sload(toBalanceSlot), amount))
            // Emit the {Transfer} event.
            mstore(0x20, amount)
            log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, caller(), shr(96, mload(0x0c)))
        }
        _afterTokenTransfer(msg.sender, to, amount);
        return true;
    }

    /// @dev Transfers `amount` tokens from `from` to `to`.
    ///
    /// Note: Does not update the allowance if it is the maximum uint256 value.
    ///
    /// Requirements:
    /// - `from` must at least have `amount`.
    /// - The caller must have at least `amount` of allowance to transfer the tokens of `from`.
    ///
    /// Emits a {Transfer} event.
    function transferFrom(address from, address to, uint256 amount) public virtual returns (bool) {
        _beforeTokenTransfer(from, to, amount);
        // Code duplication is for zero-cost abstraction if possible.
        if (_givePermit2InfiniteAllowance()) {
            /// @solidity memory-safe-assembly
            assembly {
                let from_ := shl(96, from)
                if iszero(eq(caller(), _PERMIT2)) {
                    // Compute the allowance slot and load its value.
                    mstore(0x20, caller())
                    mstore(0x0c, or(from_, _ALLOWANCE_SLOT_SEED))
                    let allowanceSlot := keccak256(0x0c, 0x34)
                    let allowance_ := sload(allowanceSlot)
                    // If the allowance is not the maximum uint256 value.
                    if not(allowance_) {
                        // Revert if the amount to be transferred exceeds the allowance.
                        if gt(amount, allowance_) {
                            mstore(0x00, 0x13be252b) // `InsufficientAllowance()`.
                            revert(0x1c, 0x04)
                        }
                        // Subtract and store the updated allowance.
                        sstore(allowanceSlot, sub(allowance_, amount))
                    }
                }
                // Compute the balance slot and load its value.
                mstore(0x0c, or(from_, _BALANCE_SLOT_SEED))
                let fromBalanceSlot := keccak256(0x0c, 0x20)
                let fromBalance := sload(fromBalanceSlot)
                // Revert if insufficient balance.
                if gt(amount, fromBalance) {
                    mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`.
                    revert(0x1c, 0x04)
                }
                // Subtract and store the updated balance.
                sstore(fromBalanceSlot, sub(fromBalance, amount))
                // Compute the balance slot of `to`.
                mstore(0x00, to)
                let toBalanceSlot := keccak256(0x0c, 0x20)
                // Add and store the updated balance of `to`.
                // Will not overflow because the sum of all user balances
                // cannot exceed the maximum uint256 value.
                sstore(toBalanceSlot, add(sload(toBalanceSlot), amount))
                // Emit the {Transfer} event.
                mstore(0x20, amount)
                log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, from_), shr(96, mload(0x0c)))
            }
        } else {
            /// @solidity memory-safe-assembly
            assembly {
                let from_ := shl(96, from)
                // Compute the allowance slot and load its value.
                mstore(0x20, caller())
                mstore(0x0c, or(from_, _ALLOWANCE_SLOT_SEED))
                let allowanceSlot := keccak256(0x0c, 0x34)
                let allowance_ := sload(allowanceSlot)
                // If the allowance is not the maximum uint256 value.
                if not(allowance_) {
                    // Revert if the amount to be transferred exceeds the allowance.
                    if gt(amount, allowance_) {
                        mstore(0x00, 0x13be252b) // `InsufficientAllowance()`.
                        revert(0x1c, 0x04)
                    }
                    // Subtract and store the updated allowance.
                    sstore(allowanceSlot, sub(allowance_, amount))
                }
                // Compute the balance slot and load its value.
                mstore(0x0c, or(from_, _BALANCE_SLOT_SEED))
                let fromBalanceSlot := keccak256(0x0c, 0x20)
                let fromBalance := sload(fromBalanceSlot)
                // Revert if insufficient balance.
                if gt(amount, fromBalance) {
                    mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`.
                    revert(0x1c, 0x04)
                }
                // Subtract and store the updated balance.
                sstore(fromBalanceSlot, sub(fromBalance, amount))
                // Compute the balance slot of `to`.
                mstore(0x00, to)
                let toBalanceSlot := keccak256(0x0c, 0x20)
                // Add and store the updated balance of `to`.
                // Will not overflow because the sum of all user balances
                // cannot exceed the maximum uint256 value.
                sstore(toBalanceSlot, add(sload(toBalanceSlot), amount))
                // Emit the {Transfer} event.
                mstore(0x20, amount)
                log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, from_), shr(96, mload(0x0c)))
            }
        }
        _afterTokenTransfer(from, to, amount);
        return true;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          EIP-2612                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev For more performance, override to return the constant value
    /// of `keccak256(bytes(name()))` if `name()` will never change.
    function _constantNameHash() internal view virtual returns (bytes32 result) {}

    /// @dev If you need a different value, override this function.
    function _versionHash() internal view virtual returns (bytes32 result) {
        result = _DEFAULT_VERSION_HASH;
    }

    /// @dev For inheriting contracts to increment the nonce.
    function _incrementNonce(address owner) internal virtual {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x0c, _NONCES_SLOT_SEED)
            mstore(0x00, owner)
            let nonceSlot := keccak256(0x0c, 0x20)
            sstore(nonceSlot, add(1, sload(nonceSlot)))
        }
    }

    /// @dev Returns the current nonce for `owner`.
    /// This value is used to compute the signature for EIP-2612 permit.
    function nonces(address owner) public view virtual returns (uint256 result) {
        /// @solidity memory-safe-assembly
        assembly {
            // Compute the nonce slot and load its value.
            mstore(0x0c, _NONCES_SLOT_SEED)
            mstore(0x00, owner)
            result := sload(keccak256(0x0c, 0x20))
        }
    }

    /// @dev Sets `value` as the allowance of `spender` over the tokens of `owner`,
    /// authorized by a signed approval by `owner`.
    ///
    /// Emits a {Approval} event.
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        if (_givePermit2InfiniteAllowance()) {
            /// @solidity memory-safe-assembly
            assembly {
                // If `spender == _PERMIT2 && value != type(uint256).max`.
                if iszero(or(xor(shr(96, shl(96, spender)), _PERMIT2), iszero(not(value)))) {
                    mstore(0x00, 0x3f68539a) // `Permit2AllowanceIsFixedAtInfinity()`.
                    revert(0x1c, 0x04)
                }
            }
        }
        bytes32 nameHash = _constantNameHash();
        //  We simply calculate it on-the-fly to allow for cases where the `name` may change.
        if (nameHash == bytes32(0)) nameHash = keccak256(bytes(name()));
        bytes32 versionHash = _versionHash();
        /// @solidity memory-safe-assembly
        assembly {
            // Revert if the block timestamp is greater than `deadline`.
            if gt(timestamp(), deadline) {
                mstore(0x00, 0x1a15a3cc) // `PermitExpired()`.
                revert(0x1c, 0x04)
            }
            let m := mload(0x40) // Grab the free memory pointer.
            // Clean the upper 96 bits.
            owner := shr(96, shl(96, owner))
            spender := shr(96, shl(96, spender))
            // Compute the nonce slot and load its value.
            mstore(0x0e, _NONCES_SLOT_SEED_WITH_SIGNATURE_PREFIX)
            mstore(0x00, owner)
            let nonceSlot := keccak256(0x0c, 0x20)
            let nonceValue := sload(nonceSlot)
            // Prepare the domain separator.
            mstore(m, _DOMAIN_TYPEHASH)
            mstore(add(m, 0x20), nameHash)
            mstore(add(m, 0x40), versionHash)
            mstore(add(m, 0x60), chainid())
            mstore(add(m, 0x80), address())
            mstore(0x2e, keccak256(m, 0xa0))
            // Prepare the struct hash.
            mstore(m, _PERMIT_TYPEHASH)
            mstore(add(m, 0x20), owner)
            mstore(add(m, 0x40), spender)
            mstore(add(m, 0x60), value)
            mstore(add(m, 0x80), nonceValue)
            mstore(add(m, 0xa0), deadline)
            mstore(0x4e, keccak256(m, 0xc0))
            // Prepare the ecrecover calldata.
            mstore(0x00, keccak256(0x2c, 0x42))
            mstore(0x20, and(0xff, v))
            mstore(0x40, r)
            mstore(0x60, s)
            let t := staticcall(gas(), 1, 0x00, 0x80, 0x20, 0x20)
            // If the ecrecover fails, the returndatasize will be 0x00,
            // `owner` will be checked if it equals the hash at 0x00,
            // which evaluates to false (i.e. 0), and we will revert.
            // If the ecrecover succeeds, the returndatasize will be 0x20,
            // `owner` will be compared against the returned address at 0x20.
            if iszero(eq(mload(returndatasize()), owner)) {
                mstore(0x00, 0xddafbaef) // `InvalidPermit()`.
                revert(0x1c, 0x04)
            }
            // Increment and store the updated nonce.
            sstore(nonceSlot, add(nonceValue, t)) // `t` is 1 if ecrecover succeeds.
            // Compute the allowance slot and store the value.
            // The `owner` is already at slot 0x20.
            mstore(0x40, or(shl(160, _ALLOWANCE_SLOT_SEED), spender))
            sstore(keccak256(0x2c, 0x34), value)
            // Emit the {Approval} event.
            log3(add(m, 0x60), 0x20, _APPROVAL_EVENT_SIGNATURE, owner, spender)
            mstore(0x40, m) // Restore the free memory pointer.
            mstore(0x60, 0) // Restore the zero pointer.
        }
    }

    /// @dev Returns the EIP-712 domain separator for the EIP-2612 permit.
    function DOMAIN_SEPARATOR() public view virtual returns (bytes32 result) {
        bytes32 nameHash = _constantNameHash();
        //  We simply calculate it on-the-fly to allow for cases where the `name` may change.
        if (nameHash == bytes32(0)) nameHash = keccak256(bytes(name()));
        bytes32 versionHash = _versionHash();
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Grab the free memory pointer.
            mstore(m, _DOMAIN_TYPEHASH)
            mstore(add(m, 0x20), nameHash)
            mstore(add(m, 0x40), versionHash)
            mstore(add(m, 0x60), chainid())
            mstore(add(m, 0x80), address())
            result := keccak256(m, 0xa0)
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  INTERNAL MINT FUNCTIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Mints `amount` tokens to `to`, increasing the total supply.
    ///
    /// Emits a {Transfer} event.
    function _mint(address to, uint256 amount) internal virtual {
        _beforeTokenTransfer(address(0), to, amount);
        /// @solidity memory-safe-assembly
        assembly {
            let totalSupplyBefore := sload(_TOTAL_SUPPLY_SLOT)
            let totalSupplyAfter := add(totalSupplyBefore, amount)
            // Revert if the total supply overflows.
            if lt(totalSupplyAfter, totalSupplyBefore) {
                mstore(0x00, 0xe5cfe957) // `TotalSupplyOverflow()`.
                revert(0x1c, 0x04)
            }
            // Store the updated total supply.
            sstore(_TOTAL_SUPPLY_SLOT, totalSupplyAfter)
            // Compute the balance slot and load its value.
            mstore(0x0c, _BALANCE_SLOT_SEED)
            mstore(0x00, to)
            let toBalanceSlot := keccak256(0x0c, 0x20)
            // Add and store the updated balance.
            sstore(toBalanceSlot, add(sload(toBalanceSlot), amount))
            // Emit the {Transfer} event.
            mstore(0x20, amount)
            log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, 0, shr(96, mload(0x0c)))
        }
        _afterTokenTransfer(address(0), to, amount);
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  INTERNAL BURN FUNCTIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Burns `amount` tokens from `from`, reducing the total supply.
    ///
    /// Emits a {Transfer} event.
    function _burn(address from, uint256 amount) internal virtual {
        _beforeTokenTransfer(from, address(0), amount);
        /// @solidity memory-safe-assembly
        assembly {
            // Compute the balance slot and load its value.
            mstore(0x0c, _BALANCE_SLOT_SEED)
            mstore(0x00, from)
            let fromBalanceSlot := keccak256(0x0c, 0x20)
            let fromBalance := sload(fromBalanceSlot)
            // Revert if insufficient balance.
            if gt(amount, fromBalance) {
                mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`.
                revert(0x1c, 0x04)
            }
            // Subtract and store the updated balance.
            sstore(fromBalanceSlot, sub(fromBalance, amount))
            // Subtract and store the updated total supply.
            sstore(_TOTAL_SUPPLY_SLOT, sub(sload(_TOTAL_SUPPLY_SLOT), amount))
            // Emit the {Transfer} event.
            mstore(0x00, amount)
            log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, shl(96, from)), 0)
        }
        _afterTokenTransfer(from, address(0), amount);
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                INTERNAL TRANSFER FUNCTIONS                 */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Moves `amount` of tokens from `from` to `to`.
    function _transfer(address from, address to, uint256 amount) internal virtual {
        _beforeTokenTransfer(from, to, amount);
        /// @solidity memory-safe-assembly
        assembly {
            let from_ := shl(96, from)
            // Compute the balance slot and load its value.
            mstore(0x0c, or(from_, _BALANCE_SLOT_SEED))
            let fromBalanceSlot := keccak256(0x0c, 0x20)
            let fromBalance := sload(fromBalanceSlot)
            // Revert if insufficient balance.
            if gt(amount, fromBalance) {
                mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`.
                revert(0x1c, 0x04)
            }
            // Subtract and store the updated balance.
            sstore(fromBalanceSlot, sub(fromBalance, amount))
            // Compute the balance slot of `to`.
            mstore(0x00, to)
            let toBalanceSlot := keccak256(0x0c, 0x20)
            // Add and store the updated balance of `to`.
            // Will not overflow because the sum of all user balances
            // cannot exceed the maximum uint256 value.
            sstore(toBalanceSlot, add(sload(toBalanceSlot), amount))
            // Emit the {Transfer} event.
            mstore(0x20, amount)
            log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, from_), shr(96, mload(0x0c)))
        }
        _afterTokenTransfer(from, to, amount);
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                INTERNAL ALLOWANCE FUNCTIONS                */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Updates the allowance of `owner` for `spender` based on spent `amount`.
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        if (_givePermit2InfiniteAllowance()) {
            if (spender == _PERMIT2) return; // Do nothing, as allowance is infinite.
        }
        /// @solidity memory-safe-assembly
        assembly {
            // Compute the allowance slot and load its value.
            mstore(0x20, spender)
            mstore(0x0c, _ALLOWANCE_SLOT_SEED)
            mstore(0x00, owner)
            let allowanceSlot := keccak256(0x0c, 0x34)
            let allowance_ := sload(allowanceSlot)
            // If the allowance is not the maximum uint256 value.
            if not(allowance_) {
                // Revert if the amount to be transferred exceeds the allowance.
                if gt(amount, allowance_) {
                    mstore(0x00, 0x13be252b) // `InsufficientAllowance()`.
                    revert(0x1c, 0x04)
                }
                // Subtract and store the updated allowance.
                sstore(allowanceSlot, sub(allowance_, amount))
            }
        }
    }

    /// @dev Sets `amount` as the allowance of `spender` over the tokens of `owner`.
    ///
    /// Emits a {Approval} event.
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        if (_givePermit2InfiniteAllowance()) {
            /// @solidity memory-safe-assembly
            assembly {
                // If `spender == _PERMIT2 && amount != type(uint256).max`.
                if iszero(or(xor(shr(96, shl(96, spender)), _PERMIT2), iszero(not(amount)))) {
                    mstore(0x00, 0x3f68539a) // `Permit2AllowanceIsFixedAtInfinity()`.
                    revert(0x1c, 0x04)
                }
            }
        }
        /// @solidity memory-safe-assembly
        assembly {
            let owner_ := shl(96, owner)
            // Compute the allowance slot and store the amount.
            mstore(0x20, spender)
            mstore(0x0c, or(owner_, _ALLOWANCE_SLOT_SEED))
            sstore(keccak256(0x0c, 0x34), amount)
            // Emit the {Approval} event.
            mstore(0x00, amount)
            log3(0x00, 0x20, _APPROVAL_EVENT_SIGNATURE, shr(96, owner_), shr(96, mload(0x2c)))
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     HOOKS TO OVERRIDE                      */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Hook that is called before any transfer of tokens.
    /// This includes minting and burning.
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /// @dev Hook that is called after any transfer of tokens.
    /// This includes minting and burning.
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          PERMIT2                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns whether to fix the Permit2 contract's allowance at infinity.
    ///
    /// This value should be kept constant after contract initialization,
    /// or else the actual allowance values may not match with the {Approval} events.
    /// For best performance, return a compile-time constant for zero-cost abstraction.
    function _givePermit2InfiniteAllowance() internal view virtual returns (bool) {
        return true;
    }
}
"
    },
    "lib/solady/src/auth/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Simple single owner authorization mixin.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/auth/Ownable.sol)
///
/// @dev Note:
/// This implementation does NOT auto-initialize the owner to `msg.sender`.
/// You MUST call the `_initializeOwner` in the constructor / initializer.
///
/// While the ownable portion follows
/// [EIP-173](https://eips.ethereum.org/EIPS/eip-173) for compatibility,
/// the nomenclature for the 2-step ownership handover may be unique to this codebase.
abstract contract Ownable {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The caller is not authorized to call the function.
    error Unauthorized();

    /// @dev The `newOwner` cannot be the zero address.
    error NewOwnerIsZeroAddress();

    /// @dev The `pendingOwner` does not have a valid handover request.
    error NoHandoverRequest();

    /// @dev Cannot double-initialize.
    error AlreadyInitialized();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                           EVENTS                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The ownership is transferred from `oldOwner` to `newOwner`.
    /// This event is intentionally kept the same as OpenZeppelin's Ownable to be
    /// compatible with indexers and [EIP-173](https://eips.ethereum.org/EIPS/eip-173),
    /// despite it not being as lightweight as a single argument event.
    event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);

    /// @dev An ownership handover to `pendingOwner` has been requested.
    event OwnershipHandoverRequested(address indexed pendingOwner);

    /// @dev The ownership handover to `pendingOwner` has been canceled.
    event OwnershipHandoverCanceled(address indexed pendingOwner);

    /// @dev `keccak256(bytes("OwnershipTransferred(address,address)"))`.
    uint256 private constant _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE =
        0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0;

    /// @dev `keccak256(bytes("OwnershipHandoverRequested(address)"))`.
    uint256 private constant _OWNERSHIP_HANDOVER_REQUESTED_EVENT_SIGNATURE =
        0xdbf36a107da19e49527a7176a1babf963b4b0ff8cde35ee35d6cd8f1f9ac7e1d;

    /// @dev `keccak256(bytes("OwnershipHandoverCanceled(address)"))`.
    uint256 private constant _OWNERSHIP_HANDOVER_CANCELED_EVENT_SIGNATURE =
        0xfa7b8eab7da67f412cc9575ed43464468f9bfbae89d1675917346ca6d8fe3c92;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STORAGE                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The owner slot is given by:
    /// `bytes32(~uint256(uint32(bytes4(keccak256("_OWNER_SLOT_NOT")))))`.
    /// It is intentionally chosen to be a high value
    /// to avoid collision with lower slots.
    /// The choice of manual storage layout is to enable compatibility
    /// with both regular and upgradeable contracts.
    bytes32 internal constant _OWNER_SLOT =
        0xffffffffffffffffffffffffffffffffffffffffffffffffffffffff74873927;

    /// The ownership handover slot of `newOwner` is given by:
    /// ```
    ///     mstore(0x00, or(shl(96, user), _HANDOVER_SLOT_SEED))
    ///     let handoverSlot := keccak256(0x00, 0x20)
    /// ```
    /// It stores the expiry timestamp of the two-step ownership handover.
    uint256 private constant _HANDOVER_SLOT_SEED = 0x389a75e1;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     INTERNAL FUNCTIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Override to return true to make `_initializeOwner` prevent double-initialization.
    function _guardInitializeOwner() internal pure virtual returns (bool guard) {}

    /// @dev Initializes the owner directly without authorization guard.
    /// This function must be called upon initialization,
    /// regardless of whether the contract is upgradeable or not.
    /// This is to enable generalization to both regular and upgradeable contracts,
    /// and to save gas in case the initial owner is not the caller.
    /// For performance reasons, this function will not check if there
    /// is an existing owner.
    function _initializeOwner(address newOwner) internal virtual {
        if (_guardInitializeOwner()) {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                if sload(ownerSlot) {
                    mstore(0x00, 0x0dc149f0) // `AlreadyInitialized()`.
                    revert(0x1c, 0x04)
                }
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Store the new value.
                sstore(ownerSlot, or(newOwner, shl(255, iszero(newOwner))))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, 0, newOwner)
            }
        } else {
            /// @solidity memory-safe-assembly
            assembly {
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Store the new value.
                sstore(_OWNER_SLOT, newOwner)
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, 0, newOwner)
            }
        }
    }

    /// @dev Sets the owner directly without authorization guard.
    function _setOwner(address newOwner) internal virtual {
        if (_guardInitializeOwner()) {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, sload(ownerSlot), newOwner)
                // Store the new value.
                sstore(ownerSlot, or(newOwner, shl(255, iszero(newOwner))))
            }
        } else {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, sload(ownerSlot), newOwner)
                // Store the new value.
                sstore(ownerSlot, newOwner)
            }
        }
    }

    /// @dev Throws if the sender is not the owner.
    function _checkOwner() internal view virtual {
        /// @solidity memory-safe-assembly
        assembly {
            // If the caller is not the stored owner, revert.
            if iszero(eq(caller(), sload(_OWNER_SLOT))) {
                mstore(0x00, 0x82b42900) // `Unauthorized()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Returns how long a two-step ownership handover is valid for in seconds.
    /// Override to return a different value if needed.
    /// Made internal to conserve bytecode. Wrap it in a public function if needed.
    function _ownershipHandoverValidFor() internal view virtual returns (uint64) {
        return 48 * 3600;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  PUBLIC UPDATE FUNCTIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Allows the owner to transfer the ownership to `newOwner`.
    function transferOwnership(address newOwner) public payable virtual onlyOwner {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(shl(96, newOwner)) {
                mstore(0x00, 0x7448fbae) // `NewOwnerIsZeroAddress()`.
                revert(0x1c, 0x04)