POL Price: $0.696135 (-0.62%)
Gas: 25.2 GWei
 

Overview

POL Balance

Polygon PoS Chain LogoPolygon PoS Chain LogoPolygon PoS Chain Logo0 POL

POL Value

$0.00

Token Holdings

Multichain Info

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Transaction Hash
Method
Block
From
To
Deposit652400522024-12-08 17:36:233 hrs ago1733679383IN
0x4C42DfDB...1B52EB0A6
0 POL0.0048851430.00000003
Deposit652359562024-12-08 15:04:356 hrs ago1733670275IN
0x4C42DfDB...1B52EB0A6
0 POL0.0037264230.00000152
Claim Rewards652359392024-12-08 15:03:596 hrs ago1733670239IN
0x4C42DfDB...1B52EB0A6
0 POL0.0023064330.00000174
Deposit652140592024-12-08 1:41:2219 hrs ago1733622082IN
0x4C42DfDB...1B52EB0A6
0 POL0.0052712833.34375006
Withdraw652038432024-12-07 19:11:4426 hrs ago1733598704IN
0x4C42DfDB...1B52EB0A6
0 POL0.0038103330.00000003
Deposit651843522024-12-07 7:26:4338 hrs ago1733556403IN
0x4C42DfDB...1B52EB0A6
0 POL0.0038843730.00000004
Claim Rewards651843152024-12-07 7:25:2338 hrs ago1733556323IN
0x4C42DfDB...1B52EB0A6
0 POL0.0023118130.07000004
Deposit651611112024-12-06 17:09:552 days ago1733504995IN
0x4C42DfDB...1B52EB0A6
0 POL0.0064473145.38541789
Withdraw651598562024-12-06 16:25:132 days ago1733502313IN
0x4C42DfDB...1B52EB0A6
0 POL0.009968972.9745347
Claim Rewards651583902024-12-06 15:33:092 days ago1733499189IN
0x4C42DfDB...1B52EB0A6
0 POL0.0052418487.68409299
Deposit651583242024-12-06 15:30:492 days ago1733499049IN
0x4C42DfDB...1B52EB0A6
0 POL0.010512181.47657747
Claim Rewards651582902024-12-06 15:29:372 days ago1733498977IN
0x4C42DfDB...1B52EB0A6
0 POL0.0055579172.29244692
Withdraw651556282024-12-06 13:54:402 days ago1733493280IN
0x4C42DfDB...1B52EB0A6
0 POL0.0105670173.2492996
Claim Rewards651380612024-12-06 3:25:012 days ago1733455501IN
0x4C42DfDB...1B52EB0A6
0 POL0.0023871531.05
Deposit651310992024-12-05 23:15:062 days ago1733440506IN
0x4C42DfDB...1B52EB0A6
0 POL0.006302948.74333895
Claim Rewards651306692024-12-05 22:59:202 days ago1733439560IN
0x4C42DfDB...1B52EB0A6
0 POL0.0028522937.1001611
Withdraw651278062024-12-05 21:15:443 days ago1733433344IN
0x4C42DfDB...1B52EB0A6
0 POL0.0055534436.11082893
Deposit651221372024-12-05 17:49:233 days ago1733420963IN
0x4C42DfDB...1B52EB0A6
0 POL0.0047898633.65321162
Deposit651193472024-12-05 16:10:103 days ago1733415010IN
0x4C42DfDB...1B52EB0A6
0 POL0.0210083132.66253074
Claim Rewards651147582024-12-05 13:26:483 days ago1733405208IN
0x4C42DfDB...1B52EB0A6
0 POL0.004501158.54637242
Deposit651055762024-12-05 8:00:223 days ago1733385622IN
0x4C42DfDB...1B52EB0A6
0 POL0.005458434.47117288
Withdraw650881932024-12-04 21:42:323 days ago1733348552IN
0x4C42DfDB...1B52EB0A6
0 POL0.0040956330
Deposit650833082024-12-04 18:45:214 days ago1733337921IN
0x4C42DfDB...1B52EB0A6
0 POL0.0051884231.82791378
Deposit650530752024-12-04 0:46:014 days ago1733273161IN
0x4C42DfDB...1B52EB0A6
0 POL0.0044215131.06
Deposit650420852024-12-03 18:12:005 days ago1733249520IN
0x4C42DfDB...1B52EB0A6
0 POL0.0040542931.35087185
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x58Cc621c...2279437DA
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
Pool

Compiler Version
v0.8.18+commit.87f61d96

Optimization Enabled:
Yes with 1000 runs

Other Settings:
default evmVersion, MIT license
File 1 of 28 : Pool.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {SafeCast} from "@openzeppelin/contracts/utils/math/SafeCast.sol";
import {RewardManager} from "./RewardManager.sol";

/**
 * 4AD - D = 4A(x + y) - (D³ / 4xy)
 * X - is value of real stable token
 * Y - is value of virtual usd
 */
contract Pool is RewardManager {
    using SafeERC20 for ERC20;
    uint private constant SYSTEM_PRECISION = 3;
    int private constant PP = 1e4; // Price Precision
    uint private constant MAX_TOKEN_BALANCE = 2 ** 40; // Max possible token balance

    /**
     * @dev Gas optimization: both the 'feeShareBP' and 'router' fields are used during the 'swapFromVUsd', 'swapToVUsd'
     * operations and can occupy the same slot.
     */
    uint16 public feeShareBP;
    address public router;
    uint public tokenBalance;
    uint public vUsdBalance;
    uint public balanceRatioMinBP;
    uint public reserves;
    uint public immutable a;
    uint public d;

    uint private immutable tokenAmountReduce;
    uint private immutable tokenAmountIncrease;

    // can restrict deposit or withdraw operations
    address private stopAuthority;
    // is deposit operation allowed
    uint public canDeposit = 1;
    // is withdraw operation allowed
    uint public canWithdraw = 1;

    event SwappedToVUsd(address sender, address token, uint amount, uint vUsdAmount, uint fee);
    event SwappedFromVUsd(address recipient, address token, uint vUsdAmount, uint amount, uint fee);

    constructor(
        address router_,
        uint a_,
        ERC20 token_,
        uint16 feeShareBP_,
        uint balanceRatioMinBP_,
        string memory lpName,
        string memory lpSymbol
    ) RewardManager(token_, lpName, lpSymbol) {
        a = a_;
        router = router_;
        stopAuthority = owner();
        feeShareBP = feeShareBP_;
        balanceRatioMinBP = balanceRatioMinBP_;

        uint decimals = token_.decimals();
        tokenAmountReduce = decimals > SYSTEM_PRECISION ? 10 ** (decimals - SYSTEM_PRECISION) : 0;
        tokenAmountIncrease = decimals < SYSTEM_PRECISION ? 10 ** (SYSTEM_PRECISION - decimals) : 0;
    }

    /**
     * @dev Throws if called by any account other than the router.
     */
    modifier onlyRouter() {
        require(router == msg.sender, "Pool: is not router");
        _;
    }

    /**
     * @dev Throws if called by any account other than the stopAuthority.
     */
    modifier onlyStopAuthority() {
        require(stopAuthority == msg.sender, "Pool: is not stopAuthority");
        _;
    }

    /**
     * @dev Modifier to prevent function from disbalancing the pool over a threshold defined by `balanceRatioMinBP`
     */
    modifier validateBalanceRatio() {
        _;
        if (tokenBalance > vUsdBalance) {
            require((vUsdBalance * BP) / tokenBalance >= balanceRatioMinBP, "Pool: low vUSD balance");
        } else if (tokenBalance < vUsdBalance) {
            require((tokenBalance * BP) / vUsdBalance >= balanceRatioMinBP, "Pool: low token balance");
        }
    }

    /**
     * @dev Modifier to make a function callable only when the deposit is allowed.
     */
    modifier whenCanDeposit() {
        require(canDeposit == 1, "Pool: deposit prohibited");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the withdraw is allowed.
     */
    modifier whenCanWithdraw() {
        require(canWithdraw == 1, "Pool: withdraw prohibited");
        _;
    }

    /**
     * @dev Calculates the price and deposit token according to the amount and price, then adds the same amount to the X
     * and to the Y
     * @param amount The deposited amount
     */
    function deposit(uint amount) external whenCanDeposit {
        uint oldD = d;

        uint amountSP = _toSystemPrecision(amount);
        require(amountSP > 0, "Pool: too little");

        token.safeTransferFrom(msg.sender, address(this), amount);

        // Add deposited amount to reserves
        reserves += amountSP;

        uint oldBalance = (tokenBalance + vUsdBalance);
        if (oldD == 0 || oldBalance == 0) {
            // Split balance equally on the first deposit
            uint halfAmount = amountSP >> 1;
            tokenBalance += halfAmount;
            vUsdBalance += halfAmount;
        } else {
            // Add amount proportionally to each pool
            tokenBalance += (amountSP * tokenBalance) / oldBalance;
            vUsdBalance += (amountSP * vUsdBalance) / oldBalance;
        }
        _updateD();
        // Deposit as many LP tokens as the D increase
        _depositLp(msg.sender, d - oldD);

        require(tokenBalance < MAX_TOKEN_BALANCE, "Pool: too much");
    }

    /*
     * @dev Subtracts X and Y for that amount, calculates current price and withdraw the token to the user according to
     * the price
     * @param amount The deposited amount
     */
    function withdraw(uint amountLp) external whenCanWithdraw {
        uint oldD = d;
        _withdrawLp(msg.sender, amountLp);

        // Always withdraw tokens in amount equal to amountLp

        // Withdraw proportionally from token and vUsd balance
        uint oldBalance = (tokenBalance + vUsdBalance);
        tokenBalance -= (amountLp * tokenBalance) / oldBalance;
        vUsdBalance -= (amountLp * vUsdBalance) / oldBalance;

        require(tokenBalance + vUsdBalance < oldBalance, "Pool: zero changes");

        // Check if there is enough funds in reserve to withdraw
        require(amountLp <= reserves, "Pool: reserves");

        // Adjust reserves by withdraw amount
        reserves -= amountLp;

        // Update D and transfer tokens to the sender
        _updateD();
        require(d < oldD, "Pool: zero D changes");

        token.safeTransfer(msg.sender, _fromSystemPrecision(amountLp));
    }

    /**
     * @notice Calculates new virtual USD value from the given amount of tokens.
     * @dev Calculates new Y according to new X.
     * NOTICE: Prior to calling this the router must transfer tokens from the user to the pool.
     * @param amount The amount of tokens to swap.
     * @param zeroFee When true it allows to swap without incurring any fees. It is intended for use with service
     * accounts.
     * @return returns the difference between the old and the new value of vUsdBalance
     */
    function swapToVUsd(
        address user,
        uint amount,
        bool zeroFee
    ) external onlyRouter validateBalanceRatio returns (uint) {
        uint result; // 0 by default
        uint fee;
        if (amount > 0) {
            if (!zeroFee) {
                fee = (amount * feeShareBP) / BP;
            }
            uint amountIn = _toSystemPrecision(amount - fee);
            // Incorporate rounding dust into the fee
            fee = amount - _fromSystemPrecision(amountIn);

            // Adjust token and reserve balances after the fee is applied
            tokenBalance += amountIn;
            reserves += amountIn;

            uint vUsdNewAmount = this.getY(tokenBalance);
            if (vUsdBalance > vUsdNewAmount) {
                result = vUsdBalance - vUsdNewAmount;
            }
            vUsdBalance = vUsdNewAmount;
            _addRewards(fee);
        }

        emit SwappedToVUsd(user, address(token), amount, result, fee);
        return result;
    }

    /**
     * @notice Calculates the amount of tokens from the given virtual USD value, and transfers it to the user.
     * @dev Calculates new X according to new Y.
     * @param user The address of the recipient.
     * @param amount The amount of vUSD to swap.
     * @param receiveAmountMin The minimum amount of tokens required to be received during the swap, otherwise the
     * transaction reverts.
     * @param zeroFee When true it allows to swap without incurring any fees. It is intended for use with service
     * accounts.
     * @return returns the difference between the old and the new value of vUsdBalance
     */
    function swapFromVUsd(
        address user,
        uint amount,
        uint receiveAmountMin,
        bool zeroFee
    ) external onlyRouter validateBalanceRatio returns (uint) {
        uint resultSP; // 0 by default
        uint result; // 0 by default
        uint fee;
        if (amount > 0) {
            vUsdBalance += amount;
            uint newAmount = this.getY(vUsdBalance);
            if (tokenBalance > newAmount) {
                resultSP = tokenBalance - newAmount;
                result = _fromSystemPrecision(resultSP);
            } // Otherwise result/resultSP stay 0

            // Check if there is enough funds in reserve to pay
            require(resultSP <= reserves, "Pool: reserves");
            // Remove from reserves including fee, apply fee later
            reserves -= resultSP;
            if (!zeroFee) {
                fee = (result * feeShareBP) / BP;
            }
            // We can use unchecked here because feeShareBP <= BP
            unchecked {
                result -= fee;
            }

            tokenBalance = newAmount;
            require(result >= receiveAmountMin, "Pool: slippage");
            token.safeTransfer(user, result);
            _addRewards(fee);
        }
        emit SwappedFromVUsd(user, address(token), amount, result, fee);
        return result;
    }

    /**
     * @dev Sets admin fee share.
     */
    function setFeeShare(uint16 feeShareBP_) external onlyOwner {
        require(feeShareBP_ <= BP, "Pool: too large");
        feeShareBP = feeShareBP_;
    }

    function adjustTotalLpAmount() external onlyOwner {
        if (d > totalSupply()) {
            _depositLp(owner(), d - totalSupply());
        }
    }

    /**
     * @dev Sets the threshold over which the pool can't be disbalanced.
     */
    function setBalanceRatioMinBP(uint balanceRatioMinBP_) external onlyOwner {
        require(balanceRatioMinBP_ <= BP, "Pool: too large");
        balanceRatioMinBP = balanceRatioMinBP_;
    }

    /**
     * @dev Switches off the possibility to make deposits.
     */
    function stopDeposit() external onlyStopAuthority {
        canDeposit = 0;
    }

    /**
     * @dev Switches on the possibility to make deposits.
     */
    function startDeposit() external onlyOwner {
        canDeposit = 1;
    }

    /**
     * @dev Switches off the possibility to make withdrawals.
     */
    function stopWithdraw() external onlyStopAuthority {
        canWithdraw = 0;
    }

    /**
     * @dev Switches on the possibility to make withdrawals.
     */
    function startWithdraw() external onlyOwner {
        canWithdraw = 1;
    }

    /**
     * @dev Sets the address of the stopAuthority account.
     */
    function setStopAuthority(address stopAuthority_) external onlyOwner {
        stopAuthority = stopAuthority_;
    }

    /**
     * @dev Sets the address of the Router contract.
     */
    function setRouter(address router_) external onlyOwner {
        router = router_;
    }

    /**
     * @dev y = (sqrt(x(4AD³ + x (4A(D - x) - D )²)) + x (4A(D - x) - D ))/8Ax.
     */
    function getY(uint x) external view returns (uint) {
        uint d_ = d; // Gas optimization
        uint a4 = a << 2;
        uint a8 = a4 << 1;
        // 4A(D - x) - D
        int part1 = int(a4) * (int(d_) - int(x)) - int(d_);
        // x * (4AD³ + x(part1²))
        uint part2 = x * (a4 * d_ * d_ * d_ + x * uint(part1 * part1));
        // (sqrt(part2) + x(part1)) / 8Ax)
        return SafeCast.toUint256(int(_sqrt(part2)) + int(x) * part1) / (a8 * x) + 1; // +1 to offset rounding errors
    }

    /**
     * @dev price = (1/2) * ((D³ + 8ADx² - 8Ax³ - 2Dx²) / (4x * sqrt(x(4AD³ + x (4A(D - x) - D )²))))
     */
    function getPrice() external view returns (uint) {
        uint x = tokenBalance;
        uint a8 = a << 3;
        uint dCubed = d * d * d;

        // 4A(D - x) - D
        int p1 = int(a << 2) * (int(d) - int(x)) - int(d);
        // x * 4AD³ + x(p1²)
        uint p2 = x * ((a << 2) * dCubed + x * uint(p1 * p1));
        // D³ + 8ADx² - 8Ax³ - 2Dx²
        int p3 = int(dCubed) + int((a << 3) * d * x * x) - int(a8 * x * x * x) - int((d << 1) * x * x);
        // 1/2 * p3 / (4x * sqrt(p2))
        return SafeCast.toUint256((PP >> 1) + ((PP * p3) / int((x << 2) * _sqrt(p2))));
    }

    function _updateD() internal {
        uint x = tokenBalance;
        uint y = vUsdBalance;
        // a = 8 * Axy(x+y)
        // b = 4 * xy(4A - 1) / 3
        // c = sqrt(a² + b³)
        // D = cbrt(a + c) + cbrt(a - c)
        uint xy = x * y;
        uint a_ = a;
        // Axy(x+y)
        uint p1 = a_ * xy * (x + y);
        // xy(4A - 1) / 3
        uint p2 = (xy * ((a_ << 2) - 1)) / 3;
        // p1² + p2³
        uint p3 = _sqrt((p1 * p1) + (p2 * p2 * p2));
        unchecked {
            uint d_ = _cbrt(p1 + p3);
            if (p3 > p1) {
                d_ -= _cbrt(p3 - p1);
            } else {
                d_ += _cbrt(p1 - p3);
            }
            d = (d_ << 1);
        }
    }

    function _toSystemPrecision(uint amount) internal view returns (uint) {
        if (tokenAmountReduce > 0) {
            return amount / tokenAmountReduce;
        } else if (tokenAmountIncrease > 0) {
            return amount * tokenAmountIncrease;
        }
        return amount;
    }

    function _fromSystemPrecision(uint amount) internal view returns (uint) {
        if (tokenAmountReduce > 0) {
            return amount * tokenAmountReduce;
        } else if (tokenAmountIncrease > 0) {
            return amount / tokenAmountIncrease;
        }
        return amount;
    }

    function _sqrt(uint n) internal pure returns (uint) {
        unchecked {
            if (n > 0) {
                uint x = (n >> 1) + 1;
                uint y = (x + n / x) >> 1;
                while (x > y) {
                    x = y;
                    y = (x + n / x) >> 1;
                }
                return x;
            }
            return 0;
        }
    }

    function _cbrt(uint n) internal pure returns (uint) {
        unchecked {
            uint x = 0;
            for (uint y = 1 << 255; y > 0; y >>= 3) {
                x <<= 1;
                uint z = 3 * x * (x + 1) + 1;
                if (n / y >= z) {
                    n -= y * z;
                    x += 1;
                }
            }
            return x;
        }
    }

    fallback() external payable {
        revert("Unsupported");
    }

    receive() external payable {
        revert("Unsupported");
    }
}

File 2 of 28 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 28 : ERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    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.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

File 4 of 28 : draft-IERC20Permit.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

File 5 of 28 : IERC20Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

File 6 of 28 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

File 7 of 28 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 8 of 28 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

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

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

File 9 of 28 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 10 of 28 : Math.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

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

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

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

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

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

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

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

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

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

File 11 of 28 : SafeCast.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

File 12 of 28 : Bridge.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IBridge, MessengerProtocol} from "./interfaces/IBridge.sol";
import {Router} from "./Router.sol";
import {Messenger} from "./Messenger.sol";
import {MessengerGateway} from "./MessengerGateway.sol";
import {IGasOracle} from "./interfaces/IGasOracle.sol";
import {GasUsage} from "./GasUsage.sol";
import {WormholeMessenger} from "./WormholeMessenger.sol";
import {HashUtils} from "./libraries/HashUtils.sol";

/**
 * @title Bridge
 * @dev A contract with functions to facilitate bridging tokens across different blockchains.
 */
contract Bridge is GasUsage, Router, MessengerGateway, IBridge {
    using SafeERC20 for IERC20;
    using HashUtils for bytes32;

    uint public immutable override chainId;
    mapping(bytes32 messageHash => uint isProcessed) public override processedMessages;
    mapping(bytes32 messageHash => uint isSent) public override sentMessages;
    // Info about bridges on other chains
    mapping(uint chainId => bytes32 bridgeAddress) public override otherBridges;
    // Info about tokens on other chains
    mapping(uint chainId => mapping(bytes32 tokenAddress => bool isSupported)) public override otherBridgeTokens;

    /**
     * @dev Emitted when tokens are sent on the source blockchain.
     */
    event TokensSent(
        uint amount,
        bytes32 recipient,
        uint destinationChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger
    );

    /**
     * @dev Emitted when the tokens are received on the destination blockchain.
     */
    event TokensReceived(uint amount, bytes32 recipient, uint nonce, MessengerProtocol messenger, bytes32 message);

    /**
     * @dev Emitted when this contract receives the bridging fee.
     */
    event ReceiveFee(uint bridgeTransactionCost, uint messageTransactionCost);

    /**
     * @dev Emitted when this contract charged the sender with the tokens for the bridging fee.
     */
    event BridgingFeeFromTokens(uint gas);

    /**
     * @dev Emitted when the contract receives native tokens (e.g. Ether on the Ethereum network) from the admin to
     * supply the gas for bridging.
     */
    event Received(address sender, uint amount);

    constructor(
        uint chainId_,
        uint chainPrecision_,
        Messenger allbridgeMessenger_,
        WormholeMessenger wormholeMessenger_,
        IGasOracle gasOracle_
    ) Router(chainPrecision_) MessengerGateway(allbridgeMessenger_, wormholeMessenger_) GasUsage(gasOracle_) {
        chainId = chainId_;
    }

    /**
     * @notice Initiates a swap and bridge process of a given token for a token on another blockchain.
     * @dev This function is used to initiate a cross-chain transfer. The specified amount of token is first transferred
     * to the pool on the current chain, and then an event `TokensSent` is emitted to signal that tokens have been sent
     * on the source chain. See the function `receiveTokens`.
     * The bridging fee required for the cross-chain transfer can be paid in two ways:
     * - by sending the required amount of native gas token along with the transaction
     *   (See `getTransactionCost` in the `GasUsage` contract and `getMessageCost` in the `MessengerGateway` contract).
     * - by setting the parameter `feeTokenAmount` with the bridging fee amount in the source tokens
     *   (See the function `getBridgingCostInTokens`).
     * @param token The token to be swapped.
     * @param amount The amount of tokens to be swapped (including `feeTokenAmount`).
     * @param destinationChainId The ID of the destination chain.
     * @param receiveToken The token to receive in exchange for the swapped token.
     * @param nonce An identifier that is used to ensure that each transfer is unique and can only be processed once.
     * @param messenger The chosen way of delivering the message across chains.
     * @param feeTokenAmount The amount of tokens to be deducted from the transferred amount as a bridging fee.
     *
     */
    function swapAndBridge(
        bytes32 token,
        uint amount,
        bytes32 recipient,
        uint destinationChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger,
        uint feeTokenAmount
    ) external payable override whenCanSwap {
        require(amount > feeTokenAmount, "Bridge: amount too low for fee");
        require(recipient != 0, "Bridge: bridge to the zero address");
        uint bridgingFee = msg.value + _convertBridgingFeeInTokensToNativeToken(msg.sender, token, feeTokenAmount);
        uint amountAfterFee = amount - feeTokenAmount;

        uint vUsdAmount = _sendAndSwapToVUsd(token, msg.sender, amountAfterFee);
        _sendTokens(vUsdAmount, recipient, destinationChainId, receiveToken, nonce, messenger, bridgingFee);
    }

    /**
     * @notice Completes the bridging process by sending the tokens on the destination chain to the recipient.
     * @dev This function is called only after a bridging has been initiated by a user
     *      through the `swapAndBridge` function on the source chain.
     * @param amount The amount of tokens being bridged.
     * @param recipient The recipient address for the bridged tokens.
     * @param sourceChainId The ID of the source chain.
     * @param receiveToken The address of the token being received.
     * @param nonce A unique nonce for the bridging transaction.
     * @param messenger The protocol used to relay the message.
     * @param receiveAmountMin The minimum amount of receiveToken required to be received.
     */
    function receiveTokens(
        uint amount,
        bytes32 recipient,
        uint sourceChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger,
        uint receiveAmountMin
    ) external payable override whenCanSwap {
        require(otherBridges[sourceChainId] != bytes32(0), "Bridge: source not registered");
        bytes32 messageWithSender = this
            .hashMessage(amount, recipient, sourceChainId, chainId, receiveToken, nonce, messenger)
            .hashWithSender(otherBridges[sourceChainId]);

        require(processedMessages[messageWithSender] == 0, "Bridge: message processed");
        // mark the transfer as received on the destination chain
        processedMessages[messageWithSender] = 1;

        // check if tokens has been sent on the source chain
        require(this.hasReceivedMessage(messageWithSender, messenger), "Bridge: no message");

        uint receiveAmount = _receiveAndSwapFromVUsd(
            receiveToken,
            address(uint160(uint(recipient))),
            amount,
            receiveAmountMin
        );
        // pass extra gas to the recipient
        if (msg.value > 0) {
            // ignore if passing extra gas failed
            // solc-ignore-next-line unused-call-retval
            payable(address(uint160(uint(recipient)))).call{value: msg.value}("");
        }
        emit TokensReceived(receiveAmount, recipient, nonce, messenger, messageWithSender);
    }

    /**
     * @notice Allows the admin to add new supported chain destination.
     * @dev Registers the address of a bridge deployed on a different chain.
     * @param chainId_ The chain ID of the bridge to register.
     * @param bridgeAddress The address of the bridge contract to register.
     */
    function registerBridge(uint chainId_, bytes32 bridgeAddress) external override onlyOwner {
        otherBridges[chainId_] = bridgeAddress;
    }

    /**
     * @notice Allows the admin to add a new supported destination token.
     * @dev Adds the address of a token on another chain to the list of supported tokens for the specified chain.
     * @param chainId_ The chain ID where the token is deployed.
     * @param tokenAddress The address of the token to add as a supported token.
     */
    function addBridgeToken(uint chainId_, bytes32 tokenAddress) external override onlyOwner {
        otherBridgeTokens[chainId_][tokenAddress] = true;
    }

    /**
     * @notice Allows the admin to remove support for a destination token.
     * @dev Removes the address of a token on another chain from the list of supported tokens for the specified chain.
     * @param chainId_ The chain ID where the token is deployed.
     * @param tokenAddress The address of the token to remove from the list of supported tokens.
     */
    function removeBridgeToken(uint chainId_, bytes32 tokenAddress) external override onlyOwner {
        otherBridgeTokens[chainId_][tokenAddress] = false;
    }

    /**
     * @notice Allows the admin to withdraw the bridging fee collected in native tokens.
     */
    function withdrawGasTokens(uint amount) external override onlyOwner {
        payable(msg.sender).transfer(amount);
    }

    /**
     * @notice Allows the admin to withdraw the bridging fee collected in tokens.
     * @param token The address of the token contract.
     */
    function withdrawBridgingFeeInTokens(IERC20 token) external onlyOwner {
        uint toWithdraw = token.balanceOf(address(this));
        if (toWithdraw > 0) {
            token.safeTransfer(msg.sender, toWithdraw);
        }
    }

    /**
     * @dev Calculates the amount of bridging fee nominated in a given token, which includes:
     * - the gas cost of making the receive transaction on the destination chain,
     * - the gas cost of sending the message to the destination chain using the specified messenger protocol.
     * @param destinationChainId The ID of the destination chain.
     * @param messenger The chosen way of delivering the message across chains.
     * @param tokenAddress The address of the token contract on the source chain.
     * @return The total price of bridging, with the precision according to the token's `decimals()` value.
     */
    function getBridgingCostInTokens(
        uint destinationChainId,
        MessengerProtocol messenger,
        address tokenAddress
    ) external view override returns (uint) {
        return
            gasOracle.getTransactionGasCostInUSD(
                destinationChainId,
                gasUsage[destinationChainId] + getMessageGasUsage(destinationChainId, messenger)
            ) / fromGasOracleScalingFactor[tokenAddress];
    }

    /**
     * @dev Produces a hash of transfer parameters, which is used as a message to the bridge on the destination chain
     *      to notify that the tokens on the source chain has been sent.
     * @param amount The amount of tokens being transferred.
     * @param recipient The address of the recipient on the destination chain.
     * @param sourceChainId The ID of the source chain.
     * @param destinationChainId The ID of the destination chain.
     * @param receiveToken The token being received on the destination chain.
     * @param nonce The unique nonce.
     * @param messenger The chosen way of delivering the message across chains.
     */
    function hashMessage(
        uint amount,
        bytes32 recipient,
        uint sourceChainId,
        uint destinationChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger
    ) external pure override returns (bytes32) {
        return
            keccak256(abi.encodePacked(amount, recipient, sourceChainId, receiveToken, nonce, messenger))
                .replaceChainBytes(uint8(sourceChainId), uint8(destinationChainId));
    }

    function _sendTokens(
        uint amount,
        bytes32 recipient,
        uint destinationChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger,
        uint bridgingFee
    ) internal {
        require(destinationChainId != chainId, "Bridge: wrong destination chain");
        require(otherBridgeTokens[destinationChainId][receiveToken], "Bridge: unknown chain or token");
        bytes32 message = this.hashMessage(
            amount,
            recipient,
            chainId,
            destinationChainId,
            receiveToken,
            nonce,
            messenger
        );

        require(sentMessages[message] == 0, "Bridge: tokens already sent");
        // mark the transfer as sent on the source chain
        sentMessages[message] = 1;

        uint bridgeTransactionCost = this.getTransactionCost(destinationChainId);
        uint messageTransactionCost = _sendMessage(message, messenger);
        emit ReceiveFee(bridgeTransactionCost, messageTransactionCost);
        unchecked {
            require(bridgingFee >= bridgeTransactionCost + messageTransactionCost, "Bridge: not enough fee");
        }
        emit TokensSent(amount, recipient, destinationChainId, receiveToken, nonce, messenger);
    }

    /**
     * @dev Charges the bridging fee in tokens and calculates the amount of native tokens that correspond
     *      to the charged fee using the current exchange rate.
     * @param user The address of the user who is paying the bridging fee
     * @param tokenAddress The address of the token used to pay the bridging fee
     * @param feeTokenAmount The amount of tokens to pay as the bridging fee
     * @return bridging fee amount in the native tokens (e.g. in wei for Ethereum)
     */
    function _convertBridgingFeeInTokensToNativeToken(
        address user,
        bytes32 tokenAddress,
        uint feeTokenAmount
    ) internal returns (uint) {
        if (feeTokenAmount == 0) return 0;
        address tokenAddress_ = address(uint160(uint(tokenAddress)));

        IERC20 token = IERC20(tokenAddress_);
        token.safeTransferFrom(user, address(this), feeTokenAmount);

        uint fee = (bridgingFeeConversionScalingFactor[tokenAddress_] * feeTokenAmount) / gasOracle.price(chainId);

        emit BridgingFeeFromTokens(fee);
        return fee;
    }

    fallback() external payable {
        revert("Unsupported");
    }

    receive() external payable {
        emit Received(msg.sender, msg.value);
    }
}

File 13 of 28 : GasOracle.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IGasOracle} from "./interfaces/IGasOracle.sol";

/**
 * @title GasOracle
 * @dev A contract that provides gas price and native token USD price data on other blockchains.
 */
contract GasOracle is Ownable, IGasOracle {
    struct ChainData {
        // price of the chain's native token in USD
        uint128 price;
        // price of a gas unit in the chain's native token with precision according to the const ORACLE_PRECISION
        uint128 gasPrice;
    }
    uint private constant ORACLE_PRECISION = 18;
    uint private constant ORACLE_SCALING_FACTOR = 10 ** ORACLE_PRECISION;
    // number to divide by to change precision from gas oracle price precision to chain precision
    uint private immutable fromOracleToChainScalingFactor;

    mapping(uint chainId => ChainData) public override chainData;
    // current chain ID
    uint public immutable override chainId;

    constructor(uint chainId_, uint chainPrecision) {
        chainId = chainId_;
        fromOracleToChainScalingFactor = 10 ** (ORACLE_PRECISION - chainPrecision);
    }

    /**
     * @notice Sets the chain data for a given chain ID.
     * @param chainId_ The ID of the given chain to set data for.
     * @param price_ The price of the given chain's native token in USD.
     * @param gasPrice The price of a gas unit in the given chain's native token (with precision according to the const
     * `ORACLE_PRECISION`).
     */
    function setChainData(uint chainId_, uint128 price_, uint128 gasPrice) external override onlyOwner {
        chainData[chainId_].price = price_;
        chainData[chainId_].gasPrice = gasPrice;
    }

    /**
     * @notice Sets only the price for a given chain ID.
     * @param chainId_ The ID of the given chain to set the price for.
     * @param price_ The price of the given chain's native token in USD.
     */
    function setPrice(uint chainId_, uint128 price_) external override onlyOwner {
        chainData[chainId_].price = price_;
    }

    /**
     * @notice Sets only the gas price for a given chain ID.
     * @param chainId_ The ID of the given chain to set the gas price for.
     * @param gasPrice The price of a gas unit in the given chain's native token (with precision according to the const
     * `ORACLE_PRECISION`).
     */
    function setGasPrice(uint chainId_, uint128 gasPrice) external override onlyOwner {
        chainData[chainId_].gasPrice = gasPrice;
    }

    /**
     * @notice Calculates the gas cost of a transaction on another chain in the current chain's native token.
     * @param otherChainId The ID of the chain for which to get the gas cost.
     * @param gasAmount The amount of gas used in a transaction.
     * @return The gas cost of a transaction in the current chain's native token
     */
    function getTransactionGasCostInNativeToken(
        uint otherChainId,
        uint gasAmount
    ) external view override returns (uint) {
        return
            (chainData[otherChainId].gasPrice * gasAmount * chainData[otherChainId].price) /
            chainData[chainId].price /
            fromOracleToChainScalingFactor;
    }

    /**
     * @notice Calculates the gas cost of a transaction on another chain in USD.
     * @param otherChainId The ID of the chain for which to get the gas cost.
     * @param gasAmount The amount of gas used in a transaction.
     * @return The gas cost of a transaction in USD with precision of `ORACLE_PRECISION`
     */
    function getTransactionGasCostInUSD(uint otherChainId, uint gasAmount) external view override returns (uint) {
        return (chainData[otherChainId].gasPrice * gasAmount * chainData[otherChainId].price) / ORACLE_SCALING_FACTOR;
    }

    /**
     * @notice Get the cross-rate between the two chains' native tokens.
     * @param otherChainId The ID of the other chain to get the cross-rate for.
     */
    function crossRate(uint otherChainId) external view override returns (uint) {
        return (chainData[otherChainId].price * ORACLE_SCALING_FACTOR) / chainData[chainId].price;
    }

    /**
     * @notice Get the price of a given chain's native token in USD.
     * @param chainId_ The ID of the given chain to get the price.
     * @return the price of the given chain's native token in USD with precision of const ORACLE_PRECISION
     */
    function price(uint chainId_) external view override returns (uint) {
        return chainData[chainId_].price;
    }

    fallback() external payable {
        revert("Unsupported");
    }

    receive() external payable {
        revert("Unsupported");
    }
}

File 14 of 28 : GasUsage.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IGasOracle} from "./interfaces/IGasOracle.sol";

/**
 * @dev Contract module which allows children to store typical gas usage of a certain transaction on another chain.
 */
abstract contract GasUsage is Ownable {
    IGasOracle internal gasOracle;
    mapping(uint chainId => uint amount) public gasUsage;

    constructor(IGasOracle gasOracle_) {
        gasOracle = gasOracle_;
    }

    /**
     * @dev Sets the amount of gas used for a transaction on a given chain.
     * @param chainId The ID of the chain.
     * @param gasAmount The amount of gas used on the chain.
     */
    function setGasUsage(uint chainId, uint gasAmount) external onlyOwner {
        gasUsage[chainId] = gasAmount;
    }

    /**
     * @dev Sets the Gas Oracle contract address.
     * @param gasOracle_ The address of the Gas Oracle contract.
     */
    function setGasOracle(IGasOracle gasOracle_) external onlyOwner {
        gasOracle = gasOracle_;
    }

    /**
     * @notice Get the gas cost of a transaction on another chain in the current chain's native token.
     * @param chainId The ID of the chain for which to get the gas cost.
     * @return The calculated gas cost of the transaction in the current chain's native token
     */
    function getTransactionCost(uint chainId) external view returns (uint) {
        unchecked {
            return gasOracle.getTransactionGasCostInNativeToken(chainId, gasUsage[chainId]);
        }
    }
}

File 15 of 28 : IBridge.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

enum MessengerProtocol {
    None,
    Allbridge,
    Wormhole,
    LayerZero
}

interface IBridge {
    function chainId() external view returns (uint);

    function processedMessages(bytes32) external view returns (uint);

    function sentMessages(bytes32) external view returns (uint);

    function otherBridges(uint) external view returns (bytes32);

    function otherBridgeTokens(uint, bytes32) external view returns (bool);

    function getBridgingCostInTokens(
        uint destinationChainId,
        MessengerProtocol messenger,
        address tokenAddress
    ) external view returns (uint);

    function hashMessage(
        uint amount,
        bytes32 recipient,
        uint sourceChainId,
        uint destinationChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger
    ) external pure returns (bytes32);

    function receiveTokens(
        uint amount,
        bytes32 recipient,
        uint sourceChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger,
        uint receiveAmountMin
    ) external payable;

    function withdrawGasTokens(uint amount) external;

    function registerBridge(uint chainId, bytes32 bridgeAddress) external;

    function addBridgeToken(uint chainId, bytes32 tokenAddress) external;

    function removeBridgeToken(uint chainId, bytes32 tokenAddress) external;

    function swapAndBridge(
        bytes32 token,
        uint amount,
        bytes32 recipient,
        uint destinationChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger,
        uint feeTokenAmount
    ) external payable;
}

File 16 of 28 : IGasOracle.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

interface IGasOracle {
    function chainData(uint chainId) external view returns (uint128 price, uint128 gasPrice);

    function chainId() external view returns (uint);

    function crossRate(uint otherChainId) external view returns (uint);

    function getTransactionGasCostInNativeToken(uint otherChainId, uint256 gasAmount) external view returns (uint);

    function getTransactionGasCostInUSD(uint otherChainId, uint256 gasAmount) external view returns (uint);

    function price(uint chainId) external view returns (uint);

    function setChainData(uint chainId, uint128 price, uint128 gasPrice) external;

    function setGasPrice(uint chainId, uint128 gasPrice) external;

    function setPrice(uint chainId, uint128 price) external;
}

File 17 of 28 : IMessenger.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

interface IMessenger {
    function sentMessagesBlock(bytes32 message) external view returns (uint);

    function receivedMessages(bytes32 message) external view returns (uint);

    function sendMessage(bytes32 message) external payable;

    function receiveMessage(bytes32 message, uint v1v2, bytes32 r1, bytes32 s1, bytes32 r2, bytes32 s2) external;
}

File 18 of 28 : IRouter.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {MessengerProtocol} from "./IBridge.sol";

interface IRouter {
    function canSwap() external view returns (uint8);

    function swap(uint amount, bytes32 token, bytes32 receiveToken, address recipient, uint receiveAmountMin) external;
}

File 19 of 28 : IWormhole.sol
// contracts/Messages.sol
// SPDX-License-Identifier: Apache 2
pragma solidity ^0.8.18;

interface Structs {
    struct Provider {
        uint16 chainId;
        uint16 governanceChainId;
        bytes32 governanceContract;
    }

    struct GuardianSet {
        address[] keys;
        uint32 expirationTime;
    }

    struct Signature {
        bytes32 r;
        bytes32 s;
        uint8 v;
        uint8 guardianIndex;
    }

    struct VM {
        uint8 version;
        uint32 timestamp;
        uint32 nonce;
        uint16 emitterChainId;
        bytes32 emitterAddress;
        uint64 sequence;
        uint8 consistencyLevel;
        bytes payload;
        uint32 guardianSetIndex;
        Signature[] signatures;
        bytes32 hash;
    }
}

interface IWormhole is Structs {
    event LogMessagePublished(
        address indexed sender,
        uint64 sequence,
        uint32 nonce,
        bytes payload,
        uint8 consistencyLevel
    );

    function publishMessage(
        uint32 nonce,
        bytes memory payload,
        uint8 consistencyLevel
    ) external payable returns (uint64 sequence);

    function parseAndVerifyVM(
        bytes calldata encodedVM
    ) external view returns (Structs.VM memory vm, bool valid, string memory reason);

    function verifyVM(Structs.VM memory vm) external view returns (bool valid, string memory reason);

    function verifySignatures(
        bytes32 hash,
        Structs.Signature[] memory signatures,
        Structs.GuardianSet memory guardianSet
    ) external pure returns (bool valid, string memory reason);

    function parseVM(bytes memory encodedVM) external pure returns (Structs.VM memory vm);

    function getGuardianSet(uint32 index) external view returns (Structs.GuardianSet memory);

    function getCurrentGuardianSetIndex() external view returns (uint32);

    function getGuardianSetExpiry() external view returns (uint32);

    function governanceActionIsConsumed(bytes32 hash) external view returns (bool);

    function isInitialized(address impl) external view returns (bool);

    function chainId() external view returns (uint16);

    function governanceChainId() external view returns (uint16);

    function governanceContract() external view returns (bytes32);

    function messageFee() external view returns (uint);
}

File 20 of 28 : HashUtils.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

library HashUtils {
    function replaceChainBytes(
        bytes32 data,
        uint8 sourceChainId,
        uint8 destinationChainId
    ) internal pure returns (bytes32 result) {
        assembly {
            mstore(0x00, data)
            mstore8(0x00, sourceChainId)
            mstore8(0x01, destinationChainId)
            result := mload(0x0)
        }
    }

    function hashWithSender(bytes32 message, bytes32 sender) internal pure returns (bytes32 result) {
        assembly {
            mstore(0x00, message)
            mstore(0x20, sender)
            result := or(
                and(
                    message,
                    0xffff000000000000000000000000000000000000000000000000000000000000 // First 2 bytes
                ),
                and(
                    keccak256(0x00, 0x40),
                    0x0000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff // Last 30 bytes
                )
            )
        }
    }

    function hashWithSenderAddress(bytes32 message, address sender) internal pure returns (bytes32 result) {
        assembly {
            mstore(0x00, message)
            mstore(0x20, sender)
            result := or(
                and(
                    message,
                    0xffff000000000000000000000000000000000000000000000000000000000000 // First 2 bytes
                ),
                and(
                    keccak256(0x00, 0x40),
                    0x0000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff // Last 30 bytes
                )
            )
        }
    }

    function hashed(bytes32 message) internal pure returns (bytes32 result) {
        assembly {
            mstore(0x00, message)
            result := keccak256(0x00, 0x20)
        }
    }
}

File 21 of 28 : Messenger.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IGasOracle} from "./interfaces/IGasOracle.sol";
import {IMessenger} from "./interfaces/IMessenger.sol";
import {GasUsage} from "./GasUsage.sol";
import {HashUtils} from "./libraries/HashUtils.sol";

/**
 * @dev This contract implements the Allbridge messenger cross-chain communication protocol.
 */
contract Messenger is Ownable, GasUsage, IMessenger {
    using HashUtils for bytes32;
    // current chain ID
    uint public immutable chainId;
    // supported destination chain IDs
    bytes32 public otherChainIds;

    // the primary account that is responsible for validation that a message has been sent on the source chain
    address private primaryValidator;
    // the secondary accounts that are responsible for validation that a message has been sent on the source chain
    mapping(address => bool) private secondaryValidators;
    mapping(bytes32 messageHash => uint blockNumber) public override sentMessagesBlock;
    mapping(bytes32 messageHash => uint isReceived) public override receivedMessages;

    event MessageSent(bytes32 indexed message);
    event MessageReceived(bytes32 indexed message);

    /**
     * @dev Emitted when the contract receives native gas tokens (e.g. Ether on the Ethereum network).
     */
    event Received(address, uint);

    /**
     * @dev Emitted when the mapping of secondary validators is updated.
     */
    event SecondaryValidatorsSet(address[] oldValidators, address[] newValidators);

    constructor(
        uint chainId_,
        bytes32 otherChainIds_,
        IGasOracle gasOracle_,
        address primaryValidator_,
        address[] memory validators
    ) GasUsage(gasOracle_) {
        chainId = chainId_;
        otherChainIds = otherChainIds_;
        primaryValidator = primaryValidator_;

        uint length = validators.length;
        for (uint index; index < length; ) {
            secondaryValidators[validators[index]] = true;
            unchecked {
                index++;
            }
        }
    }

    /**
     * @notice Sends a message to another chain.
     * @dev Emits a {MessageSent} event, which signals to the off-chain messaging service to invoke the `receiveMessage`
     * function on the destination chain to deliver the message.
     *
     * Requirements:
     *
     * - the first byte of the message must be the current chain ID.
     * - the second byte of the message must be the destination chain ID.
     * - the same message cannot be sent second time.
     * - messaging fee must be payed. (See `getTransactionCost` of the `GasUsage` contract).
     * @param message The message to be sent to the destination chain.
     */
    function sendMessage(bytes32 message) external payable override {
        require(uint8(message[0]) == chainId, "Messenger: wrong chainId");
        require(otherChainIds[uint8(message[1])] != 0, "Messenger: wrong destination");

        bytes32 messageWithSender = message.hashWithSenderAddress(msg.sender);

        require(sentMessagesBlock[messageWithSender] == 0, "Messenger: has message");
        sentMessagesBlock[messageWithSender] = block.number;

        require(msg.value >= this.getTransactionCost(uint8(message[1])), "Messenger: not enough fee");

        emit MessageSent(messageWithSender);
    }

    /**
     * @notice Delivers a message to the destination chain.
     * @dev Emits an {MessageReceived} event indicating the message has been delivered.
     *
     * Requirements:
     *
     * - a valid signature of the primary validator.
     * - a valid signature of one of the secondary validators.
     * - the second byte of the message must be the current chain ID.
     */
    function receiveMessage(
        bytes32 message,
        uint v1v2,
        bytes32 r1,
        bytes32 s1,
        bytes32 r2,
        bytes32 s2
    ) external override {
        bytes32 hashedMessage = message.hashed();
        require(ecrecover(hashedMessage, uint8(v1v2 >> 8), r1, s1) == primaryValidator, "Messenger: invalid primary");
        require(secondaryValidators[ecrecover(hashedMessage, uint8(v1v2), r2, s2)], "Messenger: invalid secondary");

        require(uint8(message[1]) == chainId, "Messenger: wrong chainId");

        receivedMessages[message] = 1;

        emit MessageReceived(message);
    }

    /**
     * @dev Allows the admin to withdraw the messaging fee collected in native gas tokens.
     */
    function withdrawGasTokens(uint amount) external onlyOwner {
        payable(msg.sender).transfer(amount);
    }

    /**
     * @dev Allows the admin to set the primary validator address.
     */
    function setPrimaryValidator(address value) external onlyOwner {
        primaryValidator = value;
    }

    /**
     * @dev Allows the admin to set the addresses of secondary validators.
     */
    function setSecondaryValidators(address[] memory oldValidators, address[] memory newValidators) external onlyOwner {
        uint length = oldValidators.length;
        uint index;
        for (; index < length; ) {
            secondaryValidators[oldValidators[index]] = false;
            unchecked {
                index++;
            }
        }
        length = newValidators.length;
        index = 0;
        for (; index < length; ) {
            secondaryValidators[newValidators[index]] = true;
            unchecked {
                index++;
            }
        }
        emit SecondaryValidatorsSet(oldValidators, newValidators);
    }

    /**
     * @dev Allows the admin to update a list of supported destination chain IDs
     * @param value Each byte of the `value` parameter represents whether a chain ID with such index is supported
     *              as a valid message destination.
     */
    function setOtherChainIds(bytes32 value) external onlyOwner {
        otherChainIds = value;
    }

    fallback() external payable {
        revert("Unsupported");
    }

    receive() external payable {
        emit Received(msg.sender, msg.value);
    }
}

File 22 of 28 : MessengerGateway.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IGasOracle} from "./interfaces/IGasOracle.sol";
import {Messenger} from "./Messenger.sol";
import {MessengerProtocol} from "./interfaces/IBridge.sol";
import {WormholeMessenger} from "./WormholeMessenger.sol";

/**
 * @dev This abstract contract provides functions for cross-chain communication and supports different messaging
 *      protocols.
 */
abstract contract MessengerGateway is Ownable {
    Messenger private allbridgeMessenger;
    WormholeMessenger private wormholeMessenger;

    constructor(Messenger allbridgeMessenger_, WormholeMessenger wormholeMessenger_) {
        allbridgeMessenger = allbridgeMessenger_;
        wormholeMessenger = wormholeMessenger_;
    }

    /**
     * @dev Sets the Allbridge Messenger contract address.
     * @param allbridgeMessenger_ The address of the Messenger contract.
     */
    function setAllbridgeMessenger(Messenger allbridgeMessenger_) external onlyOwner {
        allbridgeMessenger = allbridgeMessenger_;
    }

    /**
     * @dev Sets the Wormhole Messenger contract address.
     * @param wormholeMessenger_ The address of the WormholeMessenger contract.
     */
    function setWormholeMessenger(WormholeMessenger wormholeMessenger_) external onlyOwner {
        wormholeMessenger = wormholeMessenger_;
    }

    /**
     * @notice Get the gas cost of a messaging transaction on another chain in the current chain's native token.
     * @param chainId The ID of the chain where to send the message.
     * @param protocol The messenger used to send the message.
     * @return The calculated gas cost of the messaging transaction in the current chain's native token.
     */
    function getMessageCost(uint chainId, MessengerProtocol protocol) external view returns (uint) {
        if (protocol == MessengerProtocol.Allbridge) {
            return allbridgeMessenger.getTransactionCost(chainId);
        } else if (protocol == MessengerProtocol.Wormhole) {
            return wormholeMessenger.getTransactionCost(chainId);
        }
        return 0;
    }

    /**
     * @notice Get the amount of gas a messaging transaction uses on a given chain.
     * @param chainId The ID of the chain where to send the message.
     * @param protocol The messenger used to send the message.
     * @return The amount of gas a messaging transaction uses.
     */
    function getMessageGasUsage(uint chainId, MessengerProtocol protocol) public view returns (uint) {
        if (protocol == MessengerProtocol.Allbridge) {
            return allbridgeMessenger.gasUsage(chainId);
        } else if (protocol == MessengerProtocol.Wormhole) {
            return wormholeMessenger.gasUsage(chainId);
        }
        return 0;
    }

    /**
     * @notice Checks whether a given message has been received via the specified messenger protocol.
     * @param message The message to check.
     * @param protocol The messenger used to send the message.
     * @return A boolean indicating whether the message has been received.
     */
    function hasReceivedMessage(bytes32 message, MessengerProtocol protocol) external view returns (bool) {
        if (protocol == MessengerProtocol.Allbridge) {
            return allbridgeMessenger.receivedMessages(message) != 0;
        } else if (protocol == MessengerProtocol.Wormhole) {
            return wormholeMessenger.receivedMessages(message) != 0;
        } else {
            revert("Not implemented");
        }
    }

    /**
     * @notice Checks whether a given message has been sent.
     * @param message The message to check.
     * @return A boolean indicating whether the message has been sent.
     */
    function hasSentMessage(bytes32 message) external view returns (bool) {
        return allbridgeMessenger.sentMessagesBlock(message) != 0 || wormholeMessenger.sentMessages(message) != 0;
    }

    function _sendMessage(bytes32 message, MessengerProtocol protocol) internal returns (uint messageCost) {
        if (protocol == MessengerProtocol.Allbridge) {
            messageCost = allbridgeMessenger.getTransactionCost(uint8(message[1]));
            allbridgeMessenger.sendMessage{value: messageCost}(message);
        } else if (protocol == MessengerProtocol.Wormhole) {
            messageCost = wormholeMessenger.getTransactionCost(uint8(message[1]));
            wormholeMessenger.sendMessage{value: messageCost}(message);
        } else {
            revert("Not implemented");
        }
    }
}

File 23 of 28 : RewardManager.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";

contract RewardManager is Ownable, ERC20 {
    using SafeERC20 for ERC20;
    uint private constant P = 52;
    uint internal constant BP = 1e4;

    // Accumulated rewards per share, shifted left by P bits
    uint public accRewardPerShareP;

    // Reward token
    ERC20 public immutable token;
    // Info of each user reward debt
    mapping(address user => uint amount) public userRewardDebt;

    // Admin fee share (in basis points)
    uint public adminFeeShareBP;
    // Unclaimed admin fee amount
    uint public adminFeeAmount;

    event Deposit(address indexed user, uint amount);
    event Withdraw(address indexed user, uint amount);
    event RewardsClaimed(address indexed user, uint amount);

    constructor(ERC20 token_, string memory lpName, string memory lpSymbol) ERC20(lpName, lpSymbol) {
        token = token_;
        // Default admin fee is 20%
        adminFeeShareBP = BP / 5;
    }

    /**
     * @notice Claims pending rewards for the current staker without updating the stake balance.
     */
    function claimRewards() external {
        uint userLpAmount = balanceOf(msg.sender);
        if (userLpAmount > 0) {
            uint rewards = (userLpAmount * accRewardPerShareP) >> P;
            uint pending = rewards - userRewardDebt[msg.sender];
            if (pending > 0) {
                userRewardDebt[msg.sender] = rewards;
                token.safeTransfer(msg.sender, pending);
                emit RewardsClaimed(msg.sender, pending);
            }
        }
    }

    /**
     * @notice Sets the basis points of the admin fee share from rewards.
     */
    function setAdminFeeShare(uint adminFeeShareBP_) external onlyOwner {
        require(adminFeeShareBP_ <= BP, "RewardManager: too high");
        adminFeeShareBP = adminFeeShareBP_;
    }

    /**
     * @notice Allows the admin to claim the collected admin fee.
     */
    function claimAdminFee() external onlyOwner {
        if (adminFeeAmount > 0) {
            token.safeTransfer(msg.sender, adminFeeAmount);
            adminFeeAmount = 0;
        }
    }

    /**
     * @notice Returns pending rewards for the staker.
     * @param user The address of the staker.
     */
    function pendingReward(address user) external view returns (uint) {
        return ((balanceOf(user) * accRewardPerShareP) >> P) - userRewardDebt[user];
    }

    /**
     * @dev Returns the number of decimals used to get user representation of LP tokens.
     */
    function decimals() public pure override returns (uint8) {
        return 3;
    }

    /**
     * @dev Adds reward to the pool, splits admin fee share and updates the accumulated rewards per share.
     */
    function _addRewards(uint rewardAmount) internal {
        if (totalSupply() > 0) {
            uint adminFeeRewards = (rewardAmount * adminFeeShareBP) / BP;
            unchecked {
                rewardAmount -= adminFeeRewards;
            }
            accRewardPerShareP += (rewardAmount << P) / totalSupply();
            adminFeeAmount += adminFeeRewards;
        }
    }

    /**
     * @dev Deposits LP amount for the user, updates user reward debt and pays pending rewards.
     */
    function _depositLp(address to, uint lpAmount) internal {
        uint pending;
        uint userLpAmount = balanceOf(to); // Gas optimization
        if (userLpAmount > 0) {
            pending = ((userLpAmount * accRewardPerShareP) >> P) - userRewardDebt[to];
        }
        userLpAmount += lpAmount;
        _mint(to, lpAmount);
        userRewardDebt[to] = (userLpAmount * accRewardPerShareP) >> P;
        if (pending > 0) {
            token.safeTransfer(to, pending);
            emit RewardsClaimed(to, pending);
        }
        emit Deposit(to, lpAmount);
    }

    /**
     * @dev Withdraws LP amount for the user, updates user reward debt and pays out pending rewards.
     */
    function _withdrawLp(address from, uint lpAmount) internal {
        uint userLpAmount = balanceOf(from); // Gas optimization
        require(userLpAmount >= lpAmount, "RewardManager: not enough amount");
        uint pending;
        if (userLpAmount > 0) {
            pending = ((userLpAmount * accRewardPerShareP) >> P) - userRewardDebt[from];
        }
        userLpAmount -= lpAmount;
        _burn(from, lpAmount);
        userRewardDebt[from] = (userLpAmount * accRewardPerShareP) >> P;
        if (pending > 0) {
            token.safeTransfer(from, pending);
            emit RewardsClaimed(from, pending);
        }
        emit Withdraw(from, lpAmount);
    }

    function _transfer(address, address, uint) internal pure override {
        revert("Unsupported");
    }

    function _approve(address, address, uint) internal pure override {
        revert("Unsupported");
    }
}

File 24 of 28 : Router.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IRouter} from "./interfaces/IRouter.sol";
import {MessengerProtocol} from "./interfaces/IBridge.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Pool} from "./Pool.sol";

abstract contract Router is Ownable, IRouter {
    using SafeERC20 for ERC20;
    uint private immutable chainPrecision;
    uint internal constant ORACLE_PRECISION = 18;

    mapping(bytes32 tokenId => Pool) public pools;
    // precomputed values to divide by to change the precision from the Gas Oracle precision to the token precision
    mapping(address tokenAddress => uint scalingFactor) internal fromGasOracleScalingFactor;
    // precomputed values of the scaling factor required for paying the bridging fee with stable tokens
    mapping(address tokenAddress => uint scalingFactor) internal bridgingFeeConversionScalingFactor;

    // can restrict swap operations
    address private stopAuthority;

    /**
     * @dev The rebalancer is an account responsible for balancing the liquidity pools. It ensures that the pool is
     * balanced by executing zero-fee swaps when the pool is imbalanced.
     *
     * Gas optimization: both the 'rebalancer' and 'canSwap' fields are used in the 'swap' and 'swapAndBridge'
     * functions and can occupy the same slot.
     */
    address private rebalancer;
    uint8 public override canSwap = 1;

    /**
     * @dev Emitted during the on-chain swap of tokens.
     */
    event Swapped(
        address sender,
        address recipient,
        bytes32 sendToken,
        bytes32 receiveToken,
        uint sendAmount,
        uint receiveAmount
    );

    constructor(uint chainPrecision_) {
        chainPrecision = chainPrecision_;
        stopAuthority = owner();
    }

    /**
     * @dev Modifier to make a function callable only when the swap is allowed.
     */
    modifier whenCanSwap() {
        require(canSwap == 1, "Router: swap prohibited");
        _;
    }

    /**
     * @dev Throws if called by any account other than the stopAuthority.
     */
    modifier onlyStopAuthority() {
        require(stopAuthority == msg.sender, "Router: is not stopAuthority");
        _;
    }

    /**
     * @notice Swaps a given pair of tokens on the same blockchain.
     * @param amount The amount of tokens to be swapped.
     * @param token The token to be swapped.
     * @param receiveToken The token to receive in exchange for the swapped token.
     * @param recipient The address to receive the tokens.
     * @param receiveAmountMin The minimum amount of tokens required to receive during the swap.
     */
    function swap(
        uint amount,
        bytes32 token,
        bytes32 receiveToken,
        address recipient,
        uint receiveAmountMin
    ) external override whenCanSwap {
        uint vUsdAmount = _sendAndSwapToVUsd(token, msg.sender, amount);
        uint receivedAmount = _receiveAndSwapFromVUsd(receiveToken, recipient, vUsdAmount, receiveAmountMin);
        emit Swapped(msg.sender, recipient, token, receiveToken, amount, receivedAmount);
    }

    /**
     * @notice Allows the admin to add new supported liquidity pools.
     * @dev Adds the address of the `Pool` contract to the list of supported liquidity pools.
     * @param pool The address of the `Pool` contract.
     * @param token The address of the token in the liquidity pool.
     */
    function addPool(Pool pool, bytes32 token) external onlyOwner {
        pools[token] = pool;
        address tokenAddress = address(uint160(uint(token)));
        uint tokenDecimals = ERC20(tokenAddress).decimals();
        bridgingFeeConversionScalingFactor[tokenAddress] = 10 ** (ORACLE_PRECISION - tokenDecimals + chainPrecision);
        fromGasOracleScalingFactor[tokenAddress] = 10 ** (ORACLE_PRECISION - tokenDecimals);
    }

    /**
     * @dev Switches off the possibility to make swaps.
     */
    function stopSwap() external onlyStopAuthority {
        canSwap = 0;
    }

    /**
     * @dev Switches on the possibility to make swaps.
     */
    function startSwap() external onlyOwner {
        canSwap = 1;
    }

    /**
     * @dev Allows the admin to set the address of the stopAuthority.
     */
    function setStopAuthority(address stopAuthority_) external onlyOwner {
        stopAuthority = stopAuthority_;
    }

    /**
     * @dev Allows the admin to set the address of the rebalancer.
     */
    function setRebalancer(address rebalancer_) external onlyOwner {
        rebalancer = rebalancer_;
    }

    function _receiveAndSwapFromVUsd(
        bytes32 token,
        address recipient,
        uint vUsdAmount,
        uint receiveAmountMin
    ) internal returns (uint) {
        Pool tokenPool = pools[token];
        require(address(tokenPool) != address(0), "Router: no receive pool");
        return tokenPool.swapFromVUsd(recipient, vUsdAmount, receiveAmountMin, recipient == rebalancer);
    }

    function _sendAndSwapToVUsd(bytes32 token, address user, uint amount) internal virtual returns (uint) {
        Pool pool = pools[token];
        require(address(pool) != address(0), "Router: no pool");
        ERC20(address(uint160(uint(token)))).safeTransferFrom(user, address(pool), amount);
        return pool.swapToVUsd(user, amount, user == rebalancer);
    }
}

File 25 of 28 : TestBridgeForSwap.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {IBridge, MessengerProtocol} from "../interfaces/IBridge.sol";
import {Router} from "../Router.sol";

contract TestBridgeForSwap is IBridge, Router {
    uint public chainId;
    mapping(bytes32 messageHash => uint isProcessed) public override processedMessages;
    mapping(bytes32 messageHash => uint isSent) public override sentMessages;
    // Info about bridges on other chains
    mapping(uint chainId => bytes32 bridgeAddress) public override otherBridges;
    // Info about tokens on other chains
    mapping(uint chainId => mapping(bytes32 tokenAddress => bool isSupported)) public override otherBridgeTokens;

    event vUsdSent(uint amount);

    constructor() Router(18) {}

    function swapAndBridge(
        bytes32 token,
        uint amount,
        bytes32 recipient,
        uint destinationChainId,
        bytes32 receiveToken,
        uint nonce,
        MessengerProtocol messenger,
        uint feeTokenAmount
    ) external payable override {}

    function receiveTokens(
        uint amount,
        bytes32,
        uint,
        bytes32 receiveToken,
        uint,
        MessengerProtocol,
        uint receiveAmountMin
    ) external payable override {}

    function withdrawGasTokens(uint amount) external override onlyOwner {}

    function registerBridge(uint chainId_, bytes32 bridgeAddress_) external override onlyOwner {}

    function addBridgeToken(uint chainId_, bytes32 tokenAddress_) external override onlyOwner {}

    function removeBridgeToken(uint chainId_, bytes32 tokenAddress_) external override onlyOwner {}

    function getBridgingCostInTokens(
        uint,
        MessengerProtocol,
        address
    ) external pure override returns (uint) {
        return 0;
    }

    function hashMessage(
        uint,
        bytes32,
        uint,
        uint,
        bytes32,
        uint,
        MessengerProtocol
    ) external pure override returns (bytes32) {
        return 0;
    }

    function _sendAndSwapToVUsd(bytes32 token, address user, uint amount) internal override returns (uint) {
        uint vUsdAmount = super._sendAndSwapToVUsd(token, user, amount);
        emit vUsdSent(vUsdAmount);
        return vUsdAmount;
    }
}

File 26 of 28 : TestPool.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {Pool} from "../Pool.sol";
import {RewardManager} from "../RewardManager.sol";

contract TestPool is Pool {
    constructor(
        address router_,
        uint a_,
        ERC20 token_,
        uint16 feeShareBP_,
        uint balanceRatioMinBP_
    ) Pool(router_, a_, token_, feeShareBP_, balanceRatioMinBP_, "LP", "LP") {}

    function setVUsdBalance(uint vUsdBalance_) public {
        vUsdBalance = vUsdBalance_;
    }

    function setTokenBalance(uint tokenBalance_) public {
        tokenBalance = tokenBalance_;
    }
}

File 27 of 28 : TestPoolForRewards.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {RewardManager} from "../RewardManager.sol";

contract TestPoolForRewards is RewardManager {
    // solhint-disable-next-line no-empty-blocks
    constructor(ERC20 token) RewardManager(token, "LP", "LP") {}

    function deposit(uint amount) external {
        _depositLp(msg.sender, amount);
    }

    function withdraw(uint amount) external {
        _withdrawLp(msg.sender, amount);
    }

    function addRewards(uint amount) external {
        _addRewards(amount);
    }
}

File 28 of 28 : WormholeMessenger.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IGasOracle} from "./interfaces/IGasOracle.sol";
import {IMessenger} from "./interfaces/IMessenger.sol";
import {IWormhole} from "./interfaces/IWormhole.sol";
import {GasUsage} from "./GasUsage.sol";
import {GasOracle} from "./GasOracle.sol";
import {HashUtils} from "./libraries/HashUtils.sol";

contract WormholeMessenger is Ownable, GasUsage {
    using HashUtils for bytes32;

    IWormhole private immutable wormhole;
    uint public immutable chainId;
    bytes32 public otherChainIds;

    uint32 private nonce;
    uint8 private commitmentLevel;

    mapping(uint16 chainId => bytes32 wormholeMessengerAddress) private otherWormholeMessengers;

    mapping(bytes32 messageHash => uint isReceived) public receivedMessages;
    mapping(bytes32 messageHash => uint isSent) public sentMessages;

    event MessageSent(bytes32 indexed message, uint64 sequence);
    event MessageReceived(bytes32 indexed message, uint64 sequence);
    event Received(address, uint);

    constructor(
        uint chainId_,
        bytes32 otherChainIds_,
        IWormhole wormhole_,
        uint8 commitmentLevel_,
        IGasOracle gasOracle_
    ) GasUsage(gasOracle_) {
        chainId = chainId_;
        otherChainIds = otherChainIds_;
        wormhole = wormhole_;
        commitmentLevel = commitmentLevel_;
    }

    function sendMessage(bytes32 message) external payable {
        require(uint8(message[0]) == chainId, "WormholeMessenger: wrong chainId");
        require(otherChainIds[uint8(message[1])] != 0, "Messenger: wrong destination");
        bytes32 messageWithSender = message.hashWithSenderAddress(msg.sender);

        uint32 nonce_ = nonce;

        uint64 sequence = wormhole.publishMessage(nonce_, abi.encodePacked(messageWithSender), commitmentLevel);

        unchecked {
            nonce = nonce_ + 1;
        }

        require(sentMessages[messageWithSender] == 0, "WormholeMessenger: has message");
        sentMessages[messageWithSender] = 1;

        emit MessageSent(messageWithSender, sequence);
    }

    function receiveMessage(bytes memory encodedMsg) external {
        (IWormhole.VM memory vm, bool valid, string memory reason) = wormhole.parseAndVerifyVM(encodedMsg);

        require(valid, reason);
        require(vm.payload.length == 32, "WormholeMessenger: wrong length");

        bytes32 messageWithSender = bytes32(vm.payload);
        require(uint8(messageWithSender[1]) == chainId, "WormholeMessenger: wrong chainId");

        require(otherWormholeMessengers[vm.emitterChainId] == vm.emitterAddress, "WormholeMessenger: wrong emitter");

        receivedMessages[messageWithSender] = 1;

        emit MessageReceived(messageWithSender, vm.sequence);
    }

    function setCommitmentLevel(uint8 value) external onlyOwner {
        commitmentLevel = value;
    }

    function setOtherChainIds(bytes32 value) external onlyOwner {
        otherChainIds = value;
    }

    function registerWormholeMessenger(uint16 chainId_, bytes32 address_) external onlyOwner {
        otherWormholeMessengers[chainId_] = address_;
    }

    function withdrawGasTokens(uint amount) external onlyOwner {
        payable(msg.sender).transfer(amount);
    }

    fallback() external payable {
        revert("Unsupported");
    }

    receive() external payable {
        emit Received(msg.sender, msg.value);
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"router_","type":"address"},{"internalType":"uint256","name":"a_","type":"uint256"},{"internalType":"contract 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","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"feeShareBP","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"x","type":"uint256"}],"name":"getY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"pendingReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reserves","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"router","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"adminFeeShareBP_","type":"uint256"}],"name":"setAdminFeeShare","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"balanceRatioMinBP_","type":"uint256"}],"name":"setBalanceRatioMinBP","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"feeShareBP_","type":"uint16"}],"name":"setFeeShare","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"router_","type":"address"}],"name":"setRouter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"stopAuthority_","type":"address"}],"name":"setStopAuthority","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startDeposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stopDeposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stopWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"receiveAmountMin","type":"uint256"},{"internalType":"bool","name":"zeroFee","type":"bool"}],"name":"swapFromVUsd","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bool","name":"zeroFee","type":"bool"}],"name":"swapToVUsd","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"contract ERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"userRewardDebt","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vUsdBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountLp","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

Deployed Bytecode

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Swarm Source

ipfs://cf8bbc8d773f3a9e8c446559f4074b1091e3753e4d731f648de781ae83d19e68

Block Transaction Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.