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/// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;

import { IPoints } from "src/interfaces/IPoints.sol";
import { IBestFriend } from "src/interfaces/IBestFriend.sol";
import { Owned } from "lib/solmate/src/auth/Owned.sol";
import { FixedPointMathLib } from "lib/solmate/src/utils/FixedPointMathLib.sol";

/// @title Clubs
/// @author CopyPaste
/// @notice Taken in part from Solmate, but not imported as its easier to reason about this way
///     (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC6909.sol)
contract Clubs is Owned(msg.sender) {
    using FixedPointMathLib for uint256;

    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Approval(address indexed owner, address indexed spender, uint256 indexed id, uint256 amount);

    event Transfer(address caller, address indexed from, address indexed to, uint256 indexed id, uint256 amount);

    event Buy(uint256 indexed id, uint256 indexed pointsIn, uint256 indexed keysOut, uint256 protocolFee);

    event Sell(uint256 indexed id, uint256 indexed pointsOut, uint256 indexed keysIn, uint256 protocolFee);

    event CoinLaunched(uint256 indexed id, address indexed creator);

    /*//////////////////////////////////////////////////////////////
                             STORAGE
    //////////////////////////////////////////////////////////////*/

    /// @notice Mapping keeping track of balance for each user, and tokenId
    mapping(address user => mapping(uint256 tokenId => uint256 balance)) public balanceOf;

    /// @notice Mapping keeping track of allowance for each user, and tokenId
    mapping(address user => mapping(address spender => mapping(uint256 tokenId => uint256 amount))) public allowance;

    /// @notice Maps each tokenId to their respective total supply
    mapping(uint256 => uint256) public totalSupply;

    /// @notice Maps each tokenId to their respective names
    mapping(uint256 id => string name) public name;

    /// @notice Maps tokenIds to an image URI
    mapping(uint256 id => string uri) public uris;

    /// @notice Maps each tokenId to the curveCoefficient used for their bonding curve
    mapping(uint256 id => uint256 curveCoefficient) public coefficients;

    /// @notice The maximum id for any token, incremented when a new token is made
    uint256 public maxId;

    uint256 public constant decimals = 18;

    IPoints public immutable points;
    IBestFriend public bestFriend;

    /*//////////////////////////////////////////////////////////////
                                  INIT
    //////////////////////////////////////////////////////////////*/
    mapping(uint8 pooltype => uint256 coefficient) public poolCoefficients;

    /*
     * @notice Initialize a new coefficient for a pool type
     * @param pooltype The uint8 identified of the new pool type
     * @param coefficient The new coefficient for the pool type
     */
    function initNewCoefficient(uint8 pooltype, uint256 coefficient) external onlyOwner {
        require(poolCoefficients[pooltype] == 0, "Pool already initialized");
        poolCoefficients[pooltype] = coefficient;
    }

    /*
     * @param pts The Canonical Points contract
     * @param bf The Canonical BestFriend contract
     */
    constructor(IPoints pts, IBestFriend bf) {
        points = pts;
        bestFriend = bf;

        points.approve(address(bestFriend), type(uint256).max);
    }

    /*//////////////////////////////////////////////////////////////
                            MULTITOKEN LOGIC
    //////////////////////////////////////////////////////////////*/
    mapping(address _contract => bool whitelisted) public sendWhitelist;

    /*
     * @notice Toggle the whitelist status of a contract
     * @param _contract The address of the contract to toggle
     * @param _whitelist The new whitelist status
     */
    function toggleWhitelist(address _contract, bool _whitelist) external onlyOwner {
        sendWhitelist[_contract] = _whitelist;
    }

    modifier onlyEOA(address account) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        if (size > 0 && !sendWhitelist[account]) revert("EOA Only");
        _;
    }

    /*
     * @notice Transfer tokens from the caller to another address, EOA only
     * @param receiver The address to receive the tokens
     * @param id The token id to transfer
     * @param amount The amount of tokens to transfer
     */
    function transfer(address receiver, uint256 id, uint256 amount) public onlyEOA(receiver) {
        balanceOf[msg.sender][id] -= amount;

        balanceOf[receiver][id] += amount;

        emit Transfer(msg.sender, msg.sender, receiver, id, amount);
    }

    /*
     * @notice Transfer tokens from one address to another, requires approval
     * @param sender The address to transfer tokens from
     * @param receiver The address to transfer tokens to
     * @param id The token id to transfer
     * @param amount The amount of tokens to transfer
     */
    function transferFrom(address sender, address receiver, uint256 id, uint256 amount) public onlyEOA(receiver) {
        if (msg.sender != sender) {
            uint256 allowed = allowance[sender][msg.sender][id];
            if (allowed != type(uint256).max) allowance[sender][msg.sender][id] = allowed - amount;
        }

        balanceOf[sender][id] -= amount;

        balanceOf[receiver][id] += amount;

        emit Transfer(msg.sender, sender, receiver, id, amount);
    }

    /*
     * @notice Approve a spender to spend a certain amount of tokens
        * @param spender The address to approve
        * @param id The token id to approve
        * @param amount The amount of tokens to approve
     */
    function approve(address spender, uint256 id, uint256 amount) public {
        allowance[msg.sender][spender][id] = amount;

        emit Approval(msg.sender, spender, id, amount);
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address receiver, uint256 id, uint256 amount) internal {
        balanceOf[receiver][id] += amount;
        totalSupply[id] += amount;

        emit Transfer(msg.sender, address(0), receiver, id, amount);
    }

    function _burn(address sender, uint256 id, uint256 amount) internal {
        balanceOf[sender][id] -= amount;
        totalSupply[id] -= amount;

        emit Transfer(msg.sender, sender, address(0), id, amount);
    }

    /*//////////////////////////////////////////////////////////////
                               FEE LOGIC
    //////////////////////////////////////////////////////////////*/
    /// @notice The Protocol Fee, out of 1e18
    uint256 public protocolFeePercent;
    /// @notice The BestFriend Fee, out of 1e18
    uint256 public bestFriendFeePercent;
    /// @notice The Referral Fee, out of 1e18
    uint256 public referralFeePercent;

    /// @notice The address to recieve the protocol fee
    address public protocolFeeTo;

    /// @notice Tracks the fees earned by referrals for users
    mapping(address referer => uint256 feesEarned) public referralFeesEarned;

    /* 
     * @notice Allows the admins to change the protocolFee
     * @param newFee The new protocol fee percentage
     */
    function changeProtocolFee(uint256 newFee) external onlyOwner {
        protocolFeePercent = newFee;
    }

    /* 
     * @notice Allows the admins to change the fee directed to BestFriend LP
     *   boosts
     * @param newFee The new bestFriend fee percentage
     */
    function changeBestFriendFee(uint256 newFee) external onlyOwner {
        bestFriendFeePercent = newFee;
    }

    /* 
     * @notice Allows the admins to change the fee directed to BestFriend LP
     *   boosts
     * @param newFee The new bestFriend fee percentage
     */
    function changeReferralFee(uint256 newFee) external onlyOwner {
        // Since we deduct the referral fee from the protocol fee, we need to ensure
        // that the referral fee is less than the protocol fee
        require(newFee < protocolFeePercent, "Invalid Fee");
        referralFeePercent = newFee;
    }

    /* 
     * @notice Allows the admins to change the reciever address of the protocolFee
     * @param newReceiver The new address to recieve the protocol fee
     */
    function changeProtocolFeeTo(address newReceiver) external onlyOwner {
        protocolFeeTo = newReceiver;
    }

    /*
     * @notice Break up with your old friend and make a new one
     * @param newBestFriend The new BestFriend contract to recieve the bonusPoints
     */
    function changeBestFriend(IBestFriend newBestFriend) external onlyOwner {
        points.approve(address(newBestFriend), type(uint256).max);
        bestFriend = newBestFriend;
    }

    /*
     * @notice Allows a user to claim their referral fees
     */
    function claimReferralFees() external {
        uint256 amount = referralFeesEarned[msg.sender];
        referralFeesEarned[msg.sender] = 0;

        points.transfer(msg.sender, amount);
    }

    /*//////////////////////////////////////////////////////////////
                             EXCHANGE LOGIC
    //////////////////////////////////////////////////////////////*/

    /*
     * @notice Create a new token on the bonding curve
     * @param _name The name of the token
     * @param uri The URI of the token, pointing to an image
     * @param _type The type of the token, determining the bonding curve
     * 
     * @return The id of the new token
     */
    function createToken(string calldata _name, string calldata uri, uint8 _type, uint256 keysOut) public returns (uint256 id) {
        unchecked {
            id = ++maxId;
        }
        maxId = id;

        name[id] = _name;
        uris[id] = uri;

        uint256 coefficient = poolCoefficients[_type];
        if (coefficient == 0) {
            revert("Invalid Pool Type");
        }
        coefficients[id] = coefficient;

        _mint(msg.sender, id, 1);

        uint256 tokensIn = getPriceOut(1, keysOut, coefficient);

        uint256 bestFriendFee = tokensIn * bestFriendFeePercent / 1 ether;
        uint256 protocolFee = tokensIn * protocolFeePercent / 1 ether;

        emit CoinLaunched(id, msg.sender);
        emit Buy(id, 0, 1, 0);

        buyToken(id, tokensIn + bestFriendFee + protocolFee, keysOut, address(0));
    }

    /*
     * @notice Calculate the price of a token given the supply and amount
     * @param supply The current supply of the token
     * @param amount The amount of tokens to buy
     * @param curveCoefficient The coefficient of the curve
     * 
     * @return The price of the token
     */
    function getPriceOut(uint256 supply, uint256 amount, uint256 curveCoefficient) public pure returns (uint256) {
        // The pricing curve proof for this is as follows, but the curve follows supply^2/coefficient to determine the price
        // So the price equals Σp(i), where i is the supply and p(i) = i^2 / coefficient, up to supply + amount
        // Which equals Σp(i) to i=s from i=0 to s+a - Σp(i) to i=s from i=0
        // So we get Σi^2 / curveCoefficient to i=0 to s+a - Σi^2 / curveCoefficient to i=0 to s
        // Pull out the curveCoefficient and we get Σi^2 - Σi^2
        // Using the external proof Σi^2 from i=0 to i=n of n(n+1)(2n+1)/6
        // and we get the code below

        uint256 sum1 = supply == 0 ? 0 : (supply - 1) * (supply) * (2 * (supply - 1) + 1) / 6;
        uint256 sum2 = supply == 0 && amount == 1 ? 0 : (supply - 1 + amount) * (supply + amount) * (2 * (supply - 1 + amount) + 1) / 6;

        uint256 summation = sum2 - sum1;

        return summation * 1 ether / curveCoefficient;
    }

    /*
     * @notice Allows a user to buy tokens on the bonding curve for the protocol
     * @param tokenId The token id to buy
     * @param maxTokensIn The maximum amount of points to spend
     * @param keysOut The amount of keys to buy
     * @param referral The address of the referral
     * 
     * @return The amount of points spent
     */
    function buyToken(uint256 tokenId, uint256 maxTokensIn, uint256 keysOut, address referral) public returns (uint256 amountIn) {
        uint256 supply = totalSupply[tokenId];
        uint256 coefficient = coefficients[tokenId];

        uint256 tokensIn = getPriceOut(supply, keysOut, coefficient);

        uint256 bestFriendFee = tokensIn * bestFriendFeePercent / 1 ether;
        uint256 protocolFee = tokensIn * protocolFeePercent / 1 ether;

        amountIn = tokensIn + bestFriendFee + protocolFee;
        require(maxTokensIn >= amountIn, "Input Mismatch");

        points.transferFrom(msg.sender, address(this), amountIn);

        _mint(msg.sender, tokenId, keysOut);

        if (referral != address(0)) {
            uint256 referralFee = tokensIn * referralFeePercent / 1 ether;

            uint256 senderFee = referralFee / 2;
            uint256 refferedFee = referralFee - senderFee;

            referralFeesEarned[referral] += senderFee;
            referralFeesEarned[msg.sender] += refferedFee;

            protocolFee -= referralFee;
        }

        points.transfer(protocolFeeTo, protocolFee);
        bestFriend.addBonusPoints(bestFriendFee);

        emit Buy(tokenId, amountIn, keysOut, protocolFee);
    }

    /*
     * @notice Allows a user to sell their tokens on the bonding curve for the protocol
     * @param tokenId The token id to sell
     * @param minTokensOut The minimum amount of tokens to receive
     * @param keysIn The amount of keys to sell
     * @param referral The address of the referral
     * 
     * @return The amount of points returned to the user
     */
    function sellToken(uint256 tokenId, uint256 minTokensOut, uint256 keysIn, address referral) external returns (uint256 amountOut) {
        uint256 supply = totalSupply[tokenId];
        uint256 coefficient = coefficients[tokenId];

        uint256 tokensOut = getPriceOut(supply - keysIn, keysIn, coefficient);

        uint256 bestFriendFee = tokensOut * bestFriendFeePercent / 1 ether;
        uint256 protocolFee = tokensOut * protocolFeePercent / 1 ether;

        amountOut = tokensOut - protocolFee - bestFriendFee;
        require(amountOut >= minTokensOut, "Input Mismatch");

        points.transfer(msg.sender, amountOut);

        _burn(msg.sender, tokenId, keysIn);

        if (referral != address(0)) {
            uint256 referralFee = tokensOut * referralFeePercent / 1 ether;

            uint256 senderFee = referralFee / 2;
            uint256 referredFee = referralFee - senderFee;

            referralFeesEarned[referral] += senderFee;
            referralFeesEarned[msg.sender] += referredFee;

            protocolFee -= referralFee;
        }

        points.transfer(protocolFeeTo, protocolFee);
        bestFriend.addBonusPoints(bestFriendFee);

        emit Sell(tokenId, amountOut, keysIn, protocolFee);
    }
}

/// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

interface IPoints {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    /// @notice By maintaining ERC20 compatibility, transfers and approvals are easier to index
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

    /// @notice Keep track of whether or not a user has claimed their points
    event ClaimedA(address indexed _owner, address indexed recipient, uint256 indexed amount);
    event ClaimedB(address indexed _owner, address indexed recipient, uint256 indexed amount);
    /*//////////////////////////////////////////////////////////////
                               FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    /*
     * @param proof The merkle proof supplied by the user to prove ownership of the claim
     * @param recipient The address that will receive the claimed points
     * @param amount The amount of points claimed
     */
    function claimA(bytes32[] calldata proof, address recipient, uint256 amount, address[] calldata giftRecipients, uint256 giftAmount) external;

    function claimB(bytes32[] calldata proof, address recipient, uint256 amount, address[] calldata giftRecipients, uint256 giftAmount) external;

    /*
     * @notice Unlike ERC20, Points do not return a boolean on transfer
     * @param to The address that will receive the points
     * @param value The amount of points to transfer
     */
    function transfer(address to, uint256 value) external;

    /*
     * @notice Unlike ERC20, Points do not return a boolean on transfer
     * @param from The address that will send the points
     * @param to The address that will receive the points
     * @param value The amount of points to transfer
     */
    function transferFrom(address from, address to, uint256 value) external;

    /*
     * @param spender The address that will be allowed to spend the points
     * @param amount The amount of points the spender will be allowed to spend
     */
    function approve(address spender, uint256 amount) external;

    /*//////////////////////////////////////////////////////////////
                             VIEW FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    /*
     * @param _owner The address that will be allowed to spend the points
     * @param _spender The address that will be allowed to spend the points
     * 
     * @return The amount of points the spender is allowed to spend
     */
    function allowance(address _owner, address _spender) external view returns (uint256);

    /*
     * @param _owner The address that will be checked for points
     * 
     * @return The amount of points the owner has
     */
    function balanceOf(address _owner) external view returns (uint256);

    /*
     * @return The root of the Merkle Tree which stores claims
     */
    function merkleRootA() external view returns (bytes32);

    /*//////////////////////////////////////////////////////////////
                             ACCESS CONTROL
    //////////////////////////////////////////////////////////////*/
    /*
     * @param _address The address in question
     * 
     * @return Whether the contract is allowed to interact with points 
     */
    function isAllowed(address _address) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.23;

interface IBestFriend {
    function addBonusPoints(uint256 _amount) external;
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Simple single owner authorization mixin.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/auth/Owned.sol)
abstract contract Owned {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

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

    /*//////////////////////////////////////////////////////////////
                            OWNERSHIP STORAGE
    //////////////////////////////////////////////////////////////*/

    address public owner;

    modifier onlyOwner() virtual {
        require(msg.sender == owner, "UNAUTHORIZED");

        _;
    }

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(address _owner) {
        owner = _owner;

        emit OwnershipTransferred(address(0), _owner);
    }

    /*//////////////////////////////////////////////////////////////
                             OWNERSHIP LOGIC
    //////////////////////////////////////////////////////////////*/

    function transferOwnership(address newOwner) public virtual onlyOwner {
        owner = newOwner;

        emit OwnershipTransferred(msg.sender, newOwner);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Arithmetic library with operations for fixed-point numbers.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/FixedPointMathLib.sol)
/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)
library FixedPointMathLib {
    /*//////////////////////////////////////////////////////////////
                    SIMPLIFIED FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    uint256 internal constant MAX_UINT256 = 2**256 - 1;

    uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.

    function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
    }

    function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.
    }

    function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.
    }

    function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.
    }

    /*//////////////////////////////////////////////////////////////
                    LOW LEVEL FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function mulDivDown(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y))
            if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) {
                revert(0, 0)
            }

            // Divide x * y by the denominator.
            z := div(mul(x, y), denominator)
        }
    }

    function mulDivUp(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y))
            if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) {
                revert(0, 0)
            }

            // If x * y modulo the denominator is strictly greater than 0,
            // 1 is added to round up the division of x * y by the denominator.
            z := add(gt(mod(mul(x, y), denominator), 0), div(mul(x, y), denominator))
        }
    }

    function rpow(
        uint256 x,
        uint256 n,
        uint256 scalar
    ) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            switch x
            case 0 {
                switch n
                case 0 {
                    // 0 ** 0 = 1
                    z := scalar
                }
                default {
                    // 0 ** n = 0
                    z := 0
                }
            }
            default {
                switch mod(n, 2)
                case 0 {
                    // If n is even, store scalar in z for now.
                    z := scalar
                }
                default {
                    // If n is odd, store x in z for now.
                    z := x
                }

                // Shifting right by 1 is like dividing by 2.
                let half := shr(1, scalar)

                for {
                    // Shift n right by 1 before looping to halve it.
                    n := shr(1, n)
                } n {
                    // Shift n right by 1 each iteration to halve it.
                    n := shr(1, n)
                } {
                    // Revert immediately if x ** 2 would overflow.
                    // Equivalent to iszero(eq(div(xx, x), x)) here.
                    if shr(128, x) {
                        revert(0, 0)
                    }

                    // Store x squared.
                    let xx := mul(x, x)

                    // Round to the nearest number.
                    let xxRound := add(xx, half)

                    // Revert if xx + half overflowed.
                    if lt(xxRound, xx) {
                        revert(0, 0)
                    }

                    // Set x to scaled xxRound.
                    x := div(xxRound, scalar)

                    // If n is even:
                    if mod(n, 2) {
                        // Compute z * x.
                        let zx := mul(z, x)

                        // If z * x overflowed:
                        if iszero(eq(div(zx, x), z)) {
                            // Revert if x is non-zero.
                            if iszero(iszero(x)) {
                                revert(0, 0)
                            }
                        }

                        // Round to the nearest number.
                        let zxRound := add(zx, half)

                        // Revert if zx + half overflowed.
                        if lt(zxRound, zx) {
                            revert(0, 0)
                        }

                        // Return properly scaled zxRound.
                        z := div(zxRound, scalar)
                    }
                }
            }
        }
    }

    /*//////////////////////////////////////////////////////////////
                        GENERAL NUMBER UTILITIES
    //////////////////////////////////////////////////////////////*/

    function sqrt(uint256 x) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            let y := x // We start y at x, which will help us make our initial estimate.

            z := 181 // The "correct" value is 1, but this saves a multiplication later.

            // This segment is to get a reasonable initial estimate for the Babylonian method. With a bad
            // start, the correct # of bits increases ~linearly each iteration instead of ~quadratically.

            // We check y >= 2^(k + 8) but shift right by k bits
            // each branch to ensure that if x >= 256, then y >= 256.
            if iszero(lt(y, 0x10000000000000000000000000000000000)) {
                y := shr(128, y)
                z := shl(64, z)
            }
            if iszero(lt(y, 0x1000000000000000000)) {
                y := shr(64, y)
                z := shl(32, z)
            }
            if iszero(lt(y, 0x10000000000)) {
                y := shr(32, y)
                z := shl(16, z)
            }
            if iszero(lt(y, 0x1000000)) {
                y := shr(16, y)
                z := shl(8, z)
            }

            // Goal was to get z*z*y within a small factor of x. More iterations could
            // get y in a tighter range. Currently, we will have y in [256, 256*2^16).
            // We ensured y >= 256 so that the relative difference between y and y+1 is small.
            // That's not possible if x < 256 but we can just verify those cases exhaustively.

            // Now, z*z*y <= x < z*z*(y+1), and y <= 2^(16+8), and either y >= 256, or x < 256.
            // Correctness can be checked exhaustively for x < 256, so we assume y >= 256.
            // Then z*sqrt(y) is within sqrt(257)/sqrt(256) of sqrt(x), or about 20bps.

            // For s in the range [1/256, 256], the estimate f(s) = (181/1024) * (s+1) is in the range
            // (1/2.84 * sqrt(s), 2.84 * sqrt(s)), with largest error when s = 1 and when s = 256 or 1/256.

            // Since y is in [256, 256*2^16), let a = y/65536, so that a is in [1/256, 256). Then we can estimate
            // sqrt(y) using sqrt(65536) * 181/1024 * (a + 1) = 181/4 * (y + 65536)/65536 = 181 * (y + 65536)/2^18.

            // There is no overflow risk here since y < 2^136 after the first branch above.
            z := shr(18, mul(z, add(y, 65536))) // A mul() is saved from starting z at 181.

            // Given the worst case multiplicative error of 2.84 above, 7 iterations should be enough.
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))

            // If x+1 is a perfect square, the Babylonian method cycles between
            // floor(sqrt(x)) and ceil(sqrt(x)). This statement ensures we return floor.
            // See: https://en.wikipedia.org/wiki/Integer_square_root#Using_only_integer_division
            // Since the ceil is rare, we save gas on the assignment and repeat division in the rare case.
            // If you don't care whether the floor or ceil square root is returned, you can remove this statement.
            z := sub(z, lt(div(x, z), z))
        }
    }

    function unsafeMod(uint256 x, uint256 y) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Mod x by y. Note this will return
            // 0 instead of reverting if y is zero.
            z := mod(x, y)
        }
    }

    function unsafeDiv(uint256 x, uint256 y) internal pure returns (uint256 r) {
        /// @solidity memory-safe-assembly
        assembly {
            // Divide x by y. Note this will return
            // 0 instead of reverting if y is zero.
            r := div(x, y)
        }
    }

    function unsafeDivUp(uint256 x, uint256 y) internal pure returns (uint256 z) {
        /// @solidity memory-safe-assembly
        assembly {
            // Add 1 to x * y if x % y > 0. Note this will
            // return 0 instead of reverting if y is zero.
            z := add(gt(mod(x, y), 0), div(x, y))
        }
    }
}

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "murky/=lib/murky/",
    "openzeppelin-contracts/=lib/murky/lib/openzeppelin-contracts/",
    "solady/=lib/solady/src/",
    "solmate/=lib/solmate/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": false
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"contract IPoints","name":"pts","type":"address"},{"internalType":"contract IBestFriend","name":"bf","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"pointsIn","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"keysOut","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"protocolFee","type":"uint256"}],"name":"Buy","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"address","name":"creator","type":"address"}],"name":"CoinLaunched","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"pointsOut","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"keysIn","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"protocolFee","type":"uint256"}],"name":"Sell","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"caller","type":"address"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"bestFriend","outputs":[{"internalType":"contract IBestFriend","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"bestFriendFeePercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"maxTokensIn","type":"uint256"},{"internalType":"uint256","name":"keysOut","type":"uint256"},{"internalType":"address","name":"referral","type":"address"}],"name":"buyToken","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IBestFriend","name":"newBestFriend","type":"address"}],"name":"changeBestFriend","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newFee","type":"uint256"}],"name":"changeBestFriendFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newFee","type":"uint256"}],"name":"changeProtocolFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newReceiver","type":"address"}],"name":"changeProtocolFeeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newFee","type":"uint256"}],"name":"changeReferralFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimReferralFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"coefficients","outputs":[{"internalType":"uint256","name":"curveCoefficient","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"uri","type":"string"},{"internalType":"uint8","name":"_type","type":"uint8"},{"internalType":"uint256","name":"keysOut","type":"uint256"}],"name":"createToken","outputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"supply","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"curveCoefficient","type":"uint256"}],"name":"getPriceOut","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint8","name":"pooltype","type":"uint8"},{"internalType":"uint256","name":"coefficient","type":"uint256"}],"name":"initNewCoefficient","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"name","outputs":[{"internalType":"string","name":"name","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"points","outputs":[{"internalType":"contract IPoints","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"pooltype","type":"uint8"}],"name":"poolCoefficients","outputs":[{"internalType":"uint256","name":"coefficient","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"protocolFeePercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"protocolFeeTo","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"referralFeePercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"referer","type":"address"}],"name":"referralFeesEarned","outputs":[{"internalType":"uint256","name":"feesEarned","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"minTokensOut","type":"uint256"},{"internalType":"uint256","name":"keysIn","type":"uint256"},{"internalType":"address","name":"referral","type":"address"}],"name":"sellToken","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_contract","type":"address"}],"name":"sendWhitelist","outputs":[{"internalType":"bool","name":"whitelisted","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_contract","type":"address"},{"internalType":"bool","name":"_whitelist","type":"bool"}],"name":"toggleWhitelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"uris","outputs":[{"internalType":"string","name":"uri","type":"string"}],"stateMutability":"view","type":"function"}]

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0000000000000000000000000bd4887f7d41b35cd75dff9ffee2856106f866700000000000000000000000001d2dff13e7f4109fdcaf4ddb59fbd853abfc4208

-----Decoded View---------------
Arg [0] : pts (address): 0x0bD4887f7D41B35CD75DFF9FfeE2856106f86670
Arg [1] : bf (address): 0x1d2Dff13E7F4109fdCaf4dDb59Fbd853Abfc4208

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000000bd4887f7d41b35cd75dff9ffee2856106f86670
Arg [1] : 0000000000000000000000001d2dff13e7f4109fdcaf4ddb59fbd853abfc4208