Contract 0x2adabd6e8ce3e82f52d9998a7f64a90d294a92a4

 
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Contract Source Code Verified (Exact Match)

Contract Name:
MarinateV2

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 17 : MarinateV2.sol
// SPDX-License-Identifier: GNU GPLv3
pragma solidity ^0.8.0;

////////////////////////////////////////////////////////////////////////////////
//                                                                            //
//                                                                            //
//                              #@@@@@@@@@@@@&,                               //
//                      [email protected]@@@@   [email protected]@@@@@@@@@@@@@@@@@@*                        //
//                  %@@@,    @@@@@@@@@@@@@@@@@@@@@@@@@@@@@                    //
//               @@@@     @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@                 //
//             @@@@     @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@               //
//           *@@@#    [email protected]@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@             //
//          *@@@%    &@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@            //
//          @@@@     @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@           //
//          @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@           //
//                                                                            //
//          (@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@,           //
//          (@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@,           //
//                                                                            //
//          @@@@@   @@@@@@@@@   @@@@@@@@@   @@@@@@@@@   @@@@@@@@@             //
//            &@@@@@@@    #@@@@@@@.   ,@@@@@@@,   [email protected]@@@@@@/    @@@@           //
//                                                                            //
//          @@@@@      @@@%    *@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@           //
//          @@@@@      @@@@    %@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@           //
//          [email protected]@@@      @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@            //
//            @@@@@  &@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@             //
//                (&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&(                 //
//                                                                            //
//                                                                            //
////////////////////////////////////////////////////////////////////////////////

// Libraries
import { AccessControl } from "@openzeppelin/contracts/access/AccessControl.sol";
import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import { ContractWhitelist } from "./ContractWhitelist.sol";

// Interfaces
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IERC721 } from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import { IERC721Receiver } from "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";

/// @title Umami MarinateV2 Staking
/// @author 0xtoki luffyowls
contract MarinateV2 is AccessControl, IERC721Receiver, ReentrancyGuard, ERC20, ContractWhitelist {
    using SafeERC20 for IERC20;

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

    /// @notice ttal token rewards
    mapping(address => uint256) public totalTokenRewardsPerStake;

    /// @notice number of reward epochs paid to marinator
    mapping(address => mapping(address => uint256)) public paidTokenRewardsPerStake;

    /// @notice the multiplier percentage of an nft
    /// the multiplier amount for that nft collection represented as a percentage with base 10000 -> 5% = 500
    mapping(address => uint256) public nftMultiplier;

    /// @notice if the user has an nft staked
    mapping(address => mapping(address => bool)) public isNFTStaked;

    /// @notice if the token is an approved reward token
    mapping(address => bool) public isApprovedRewardToken;

    /// @notice if the token is an approved NFT for staking
    mapping(address => bool) public isApprovedMultiplierNFT;

    /// @notice the marinator info for a marinator
    mapping(address => Marinator) public marinatorInfo;

    /// @notice rewards due to be paid to marinator
    mapping(address => mapping(address => uint256)) public toBePaid;

    /// @notice an array of reward tokens to issue rewards in
    address[] public rewardTokens;

    /// @notice an array of multiplier tokens to use for multiplying the reward
    address[] public multiplierNFTs;

    /// @notice is staking enabled
    bool public stakeEnabled;

    /// @notice is nft staking enabled
    bool public multiplierStakingEnabled;

    /// @notice are withdrawals enabled
    bool public withdrawEnabled;

    /// @notice allow early withdrawals from staking multiplier
    bool public multiplierWithdrawEnabled;

    /// @notice if transfering mUMAMI is enabled
    bool public transferEnabled;

    /// @notice allow payment of rewards
    bool public payRewardsEnabled;

    /// @notice total UMAMI staked
    uint256 public totalStaked;

    /// @notice total staked taking into consideration multipliers
    uint256 public totalMultipliedStaked;

    /// @notice scale used for calcs
    uint256 public SCALE;

    /// @notice deposit upper limit
    uint256 public depositLimit;

    /************************************************
     *  IMMUTABLES & CONSTANTS
     ***********************************************/

    /// @notice the admin role hash
    bytes32 public constant ADMIN_ROLE = keccak256("ADMIN_ROLE");

    /// @notice for base calculations
    uint256 public constant BASE = 10000;

    /// @notice address of the UMAMI token
    address public immutable UMAMI;

    /************************************************
     *  STRUCTS
     ***********************************************/

    struct Marinator {
        uint256 amount;
        uint256 multipliedAmount;
    }

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

    event Stake(address addr, uint256 amount, uint256 multipliedAmount);
    event StakeMultiplier(address addr, address nft, uint256 tokenId, uint256 multipliedAmount);
    event Withdraw(address addr, uint256 amount);
    event WithdrawMultiplier(address addr, address nft, uint256 tokenId, uint256 multipliedAmount);
    event RewardCollection(address token, address addr, uint256 amount);
    event RewardAdded(address token, uint256 amount, uint256 rps);
    event RewardClaimed(address token, address staker, uint256 amount);

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

    constructor(
        address _UMAMI,
        string memory name,
        string memory symbol,
        uint256 _depositLimit
    ) ERC20(name, symbol) {
        UMAMI = _UMAMI;
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _grantRole(ADMIN_ROLE, msg.sender);
        rewardTokens.push(_UMAMI);
        isApprovedRewardToken[_UMAMI] = true;
        stakeEnabled = true;
        multiplierStakingEnabled = true;
        withdrawEnabled = false;
        multiplierWithdrawEnabled = false;
        transferEnabled = true;
        payRewardsEnabled = true;
        depositLimit = _depositLimit;
        totalStaked = 0;
        totalMultipliedStaked = 0;
        SCALE = 1e40;
    }

    /************************************************
     *  DEPOSIT & WITHDRAW
     ***********************************************/

    /**
     * @notice stake a multiplier nft
     * @param nft the address of the NFT contract
     * @param tokenId the tokenId of the nft to stake
     */
    function stakeMultiplier(address nft, uint256 tokenId) external isEligibleSender {
        require(multiplierStakingEnabled, "NFT staking not enabled");
        require(isApprovedMultiplierNFT[nft], "Unapproved NFT");
        require(!isNFTStaked[msg.sender][nft], "NFT already staked");

        // stake nft multiplier
        IERC721(nft).safeTransferFrom(msg.sender, address(this), tokenId);
        isNFTStaked[msg.sender][nft] = true;

        // update existing marinated amount
        Marinator memory info = marinatorInfo[msg.sender];
        uint256 newMultipliedAmount = _getMultipliedAmount(info.amount, msg.sender);

        // update marinator info
        marinatorInfo[msg.sender] = Marinator({ amount: info.amount, multipliedAmount: newMultipliedAmount });

        // update totals
        totalMultipliedStaked -= info.multipliedAmount;
        totalMultipliedStaked += newMultipliedAmount;

        // store the sender's info
        emit StakeMultiplier(msg.sender, nft, tokenId, newMultipliedAmount);
    }

    /**
     * @notice withdraw a multiplier nft
     * @param nft the address of the NFT contract
     * @param tokenId the tokenId of the nft to stake
     */
    function withdrawMultiplier(address nft, uint256 tokenId) external {
        require(multiplierWithdrawEnabled, "Withdraw not enabled");
        require(isApprovedMultiplierNFT[nft], "Unapproved NFT");
        require(isNFTStaked[msg.sender][nft], "NFT not staked");

        Marinator memory info = marinatorInfo[msg.sender];

        isNFTStaked[msg.sender][nft] = false;
        IERC721(nft).safeTransferFrom(address(this), msg.sender, tokenId);

        uint256 newMultipliedAmount = _getMultipliedAmount(info.amount, msg.sender);

        // update existing marinated amount
        marinatorInfo[msg.sender] = Marinator({ amount: info.amount, multipliedAmount: newMultipliedAmount });

        // update totals
        totalMultipliedStaked -= info.multipliedAmount;
        totalMultipliedStaked += newMultipliedAmount;

        emit WithdrawMultiplier(msg.sender, nft, tokenId, newMultipliedAmount);
    }

    /**
     * @notice stake UMAMI
     * @param amount the amount of umami to stake
     */
    function stake(uint256 amount) external isEligibleSender {
        require(stakeEnabled, "Staking not enabled");
        require(amount > 0, "Invalid stake amount");
        require(totalStaked < depositLimit, "Deposit capacity reached");

        Marinator memory info = marinatorInfo[msg.sender];
        if (info.amount == 0) {
            // new user - not eligible for any previous rewards on any token
            _resetPaidRewards(msg.sender);
        } else {
            _collectRewards(msg.sender);
        }

        IERC20(UMAMI).safeTransferFrom(msg.sender, address(this), amount);
        _mint(msg.sender, amount);

        uint256 multipliedAmount = _getMultipliedAmount(amount, msg.sender);

        // store the sender's info
        marinatorInfo[msg.sender] = Marinator({
            amount: info.amount + amount,
            multipliedAmount: info.multipliedAmount + multipliedAmount
        });

        totalStaked += amount;
        totalMultipliedStaked += multipliedAmount;
        emit Stake(msg.sender, amount, multipliedAmount);
    }

    /**
     * @notice withdraw staked UMAMI and burn mUMAMI
     */
    function withdraw() public nonReentrant {
        require(withdrawEnabled, "Withdraw not enabled");
        Marinator memory info = marinatorInfo[msg.sender];
        require(info.multipliedAmount > 0, "No staked balance");

        _collectRewards(msg.sender);
        _payRewards(msg.sender);

        delete marinatorInfo[msg.sender];
        totalMultipliedStaked -= info.multipliedAmount;
        totalStaked -= info.amount;

        IERC20(UMAMI).safeTransfer(msg.sender, info.amount);
        _burn(msg.sender, info.amount);

        emit Withdraw(msg.sender, info.amount);
    }

    /************************************************
     *  REWARDS
     ***********************************************/

    /**
     * @notice claim rewards
     */
    function claimRewards() public nonReentrant {
        _collectRewards(msg.sender);
        _payRewards(msg.sender);
    }

    /**
     * @notice adds a reward token amount
     * @param token the token address of the reward
     * @param amount the amount of the token
     */
    function addReward(address token, uint256 amount) external nonReentrant {
        require(isApprovedRewardToken[token], "Token is not approved");
        require(totalMultipliedStaked > 0, "Total multiplied staked zero");

        IERC20(token).safeTransferFrom(msg.sender, address(this), amount);

        uint256 rewardPerStake = (amount * SCALE) / totalMultipliedStaked;
        require(rewardPerStake > 0, "Insufficient reward per stake");
        totalTokenRewardsPerStake[token] += rewardPerStake;
        emit RewardAdded(token, amount, rewardPerStake);
    }

    /**
     * @notice pay rewards to a marinator
     */
    function _payRewards(address user) private {
        require(payRewardsEnabled, "Pay rewards disabled");
        for (uint256 i = 0; i < rewardTokens.length; i++) {
            address token = rewardTokens[i];
            uint256 amount = toBePaid[token][user];
            IERC20(token).safeTransfer(user, amount);
            emit RewardClaimed(token, user, amount);
            delete toBePaid[token][user];
        }
    }

    /**
     * @notice reset rewards for user
     * @param user the user to reset rewards paid for
     */
    function _resetPaidRewards(address user) private {
        for (uint256 i = 0; i < rewardTokens.length; i++) {
            address token = rewardTokens[i];
            paidTokenRewardsPerStake[token][user] = totalTokenRewardsPerStake[token];
        }
    }

    /**
     * @notice collect rewards from a marinator
     * @param user the amount of umami to stake
     */
    function _collectRewards(address user) private {
        for (uint256 i = 0; i < rewardTokens.length; i++) {
            _collectRewardsForToken(rewardTokens[i], user);
        }
    }

    /**
     * @notice collect rewards for a token
     * @param token the token to collect rewards for
     * @param user the amount of umami to stake
     */
    function _collectRewardsForToken(address token, address user) private {
        Marinator memory info = marinatorInfo[user];
        if (info.multipliedAmount > 0) {
            uint256 owedPerUnitStake = totalTokenRewardsPerStake[token] - paidTokenRewardsPerStake[token][user];
            uint256 totalRewards = (info.multipliedAmount * owedPerUnitStake) / SCALE;
            paidTokenRewardsPerStake[token][user] = totalTokenRewardsPerStake[token];
            toBePaid[token][user] += totalRewards;
        }
    }

    /************************************************
     *  MUTATORS
     ***********************************************/

    /**
     * @notice add an approved reward token to be paid
     * @param token the address of the token to be paid in
     */
    function addApprovedRewardToken(address token) external onlyAdmin {
        require(!isApprovedRewardToken[token], "Reward token exists");
        isApprovedRewardToken[token] = true;
        rewardTokens.push(token);
    }

    /**
     * @notice remove a reward token
     * @param token the address of the token to remove
     */
    function removeApprovedRewardToken(address token) external onlyAdmin {
        require(isApprovedRewardToken[token], "Reward token does not exist");
        for (uint256 i = 0; i < rewardTokens.length; i++) {
            if (rewardTokens[i] == token) {
                rewardTokens[i] = rewardTokens[rewardTokens.length - 1];
                rewardTokens.pop();
                isApprovedRewardToken[token] = false;
            }
        }
    }

    /**
     * @notice add an nft multiplier token
     * @param token the address of the token to add
     * @param multiplier the multiplier amount for that nft collection represented as a percentaage with base 10000
     * eg. a multiplier of 500 will be 5%
     */
    function addApprovedMultiplierToken(address token, uint256 multiplier) external onlyAdmin {
        require(!isApprovedMultiplierNFT[token], "Approved NFT exists");
        isApprovedMultiplierNFT[token] = true;
        nftMultiplier[token] = multiplier;
        multiplierNFTs.push(token);
    }

    /**
     * @notice remove a nft multiplier token
     * @param token the address of the token to remove
     */
    function removeApprovedMultiplierToken(address token) external onlyAdmin {
        require(isApprovedMultiplierNFT[token], "Approved NFT does not exist");
        for (uint256 i = 0; i < multiplierNFTs.length; i++) {
            if (multiplierNFTs[i] == token) {
                multiplierNFTs[i] = multiplierNFTs[multiplierNFTs.length - 1];
                multiplierNFTs.pop();
                isApprovedMultiplierNFT[token] = false;
            }
        }
    }

    /**
     * @notice set the scale
     * @param _scale scale
     */
    function setScale(uint256 _scale) external onlyAdmin {
        SCALE = _scale;
    }

    /**
     * @notice set staking enabled
     * @param enabled enabled
     */
    function setStakeEnabled(bool enabled) external onlyAdmin {
        stakeEnabled = enabled;
    }

    /**
     * @notice set multiplier staking enabled
     * @param enabled enabled
     */
    function setMultiplierStakeEnabled(bool enabled) external onlyAdmin {
        multiplierStakingEnabled = enabled;
    }

    /**
     * @notice set withdrawal enabled
     * @param enabled enabled
     */
    function setStakingWithdrawEnabled(bool enabled) external onlyAdmin {
        withdrawEnabled = enabled;
    }

    /**
     * @notice set multiplier withdrawal enabled
     * @param enabled enabled
     */
    function setMultiplierWithdrawEnabled(bool enabled) external onlyAdmin {
        multiplierWithdrawEnabled = enabled;
    }

    /**
     * @notice set transfer enabled
     * @param enabled enabled
     */
    function setTransferEnabled(bool enabled) external onlyAdmin {
        transferEnabled = enabled;
    }

    /**
     * @notice set pay rewards enabled
     * @param enabled enabled
     */
    function setPayRewardsEnabled(bool enabled) external onlyAdmin {
        payRewardsEnabled = enabled;
    }

    /**
     * @notice set deposit limit
     * @param limit upper limit for deposits
     */
    function setDepositLimit(uint256 limit) external onlyAdmin {
        depositLimit = limit;
    }

    /************************************************
     *  VIEWS
     ***********************************************/

    /**
     * @notice get the multiplied amount of total share
     * @param amount the unmultiplied amount
     * @return multipliedAmount the reward amount considering the multiplier nft's the user has staked
     */
    function _getMultipliedAmount(uint256 amount, address account) private view returns (uint256 multipliedAmount) {
        if (!isWhitelisted(account)) {
            return 0;
        }
        uint256 multiplier = BASE;
        for (uint256 i = 0; i < multiplierNFTs.length; i++) {
            if (isNFTStaked[account][multiplierNFTs[i]]) {
                multiplier += nftMultiplier[multiplierNFTs[i]];
            }
        }
        multipliedAmount = (amount * SCALE * multiplier) / BASE;
    }

    /**
     * @notice get the available token rewards
     * @param staker the marinator
     * @param token the token to check for
     * @return totalRewards - the available rewards for that token and marinator
     */
    function getAvailableTokenRewards(address staker, address token) external view returns (uint256 totalRewards) {
        Marinator memory info = marinatorInfo[staker];
        uint256 owedPerUnitStake = totalTokenRewardsPerStake[token] - paidTokenRewardsPerStake[token][staker];
        uint256 pendingRewards = (info.multipliedAmount * owedPerUnitStake) / SCALE;
        totalRewards = pendingRewards + toBePaid[token][staker];
    }

    /************************************************
     *  ERC20 OVERRIDES
     ***********************************************/

    /**
     * @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.
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256
    ) internal virtual override {
        require(transferEnabled, "Transfer disabled");
        if (from == address(0) || to == address(0)) {
            return;
        } else {
            Marinator memory info = marinatorInfo[to];
            if (info.amount == 0) {
                _resetPaidRewards(to);
            }
            if (isWhitelisted(from)) {
                _collectRewards(from);
            }
            if (isWhitelisted(to)) {
                _collectRewards(to);
            }
        }
    }

    /**
     * @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.
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256
    ) internal virtual override {
        if (from == address(0) || to == address(0)) {
            return;
        } else {
            uint256 fromBalance = balanceOf(from);
            uint256 toBalance = balanceOf(to);
            Marinator memory marinatorFrom = marinatorInfo[from];
            Marinator memory marinatorTo = marinatorInfo[to];

            // get new multiplied amounts
            uint256 multipliedFromAmount = _getMultipliedAmount(fromBalance, from);
            uint256 multipliedToAmount = _getMultipliedAmount(toBalance, to);

            // calculate total old multiplied amounts
            uint256 oldMultipliedAmount = marinatorFrom.multipliedAmount + marinatorTo.multipliedAmount;
            uint256 newMultipliedAmount = multipliedFromAmount + multipliedToAmount;

            // calculate new total multiplied staked
            if (isWhitelisted(from) && isWhitelisted(to)) {
                totalMultipliedStaked -= oldMultipliedAmount;
                totalMultipliedStaked += newMultipliedAmount;
            } else {
                if (!isWhitelisted(to)) {
                    totalMultipliedStaked -= marinatorFrom.multipliedAmount;
                    totalMultipliedStaked += multipliedFromAmount;
                }
                if (!isWhitelisted(from)) {
                    totalMultipliedStaked -= marinatorTo.multipliedAmount;
                    totalMultipliedStaked += multipliedToAmount;
                }
            }
            // update marinator info
            marinatorInfo[from] = Marinator({ amount: fromBalance, multipliedAmount: multipliedFromAmount });
            marinatorInfo[to] = Marinator({ amount: toBalance, multipliedAmount: multipliedToAmount });
        }
    }

    /**
     * @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 9;
    }

    /************************************************
     *  ERC721 HANDLERS
     ***********************************************/

    /**
     * @notice ERC721 transfer
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) external pure override returns (bytes4) {
        return MarinateV2.onERC721Received.selector;
    }

    /************************************************
     *  ADMIN
     ***********************************************/

    /**
     * @notice migrate a token to a different address
     * @param token the token address
     * @param destination the token destination
     * @param amount the token amount
     */
    function migrateToken(
        address token,
        address destination,
        uint256 amount
    ) external onlyAdmin {
        uint256 total = 0;
        if (amount == 0) {
            total = IERC20(token).balanceOf(address(this));
        } else {
            total = amount;
        }
        IERC20(token).safeTransfer(destination, total);
    }

    /**
     * @notice recover eth
     */
    function recoverEth() external onlyAdmin {
        (bool success, ) = msg.sender.call{ value: address(this).balance }("");
        require(success, "Withdraw failed");
    }

    /************************************************
     *  MODIFIERS
     ***********************************************/

    modifier onlyAdmin() {
        require(hasRole(ADMIN_ROLE, msg.sender), "Caller is not an admin");
        _;
    }
}

File 2 of 17 : AccessControl.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role, _msgSender());
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

File 3 of 17 : ERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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.zeppelin.solutions/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:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, 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}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), 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}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - 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) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][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) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * 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:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, 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;
        _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;
        }
        _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 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 17 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.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));
        }
    }

    /**
     * @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 5 of 17 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 6 of 17 : ContractWhitelist.sol
// SPDX-License-Identifier: GNU GPLv3
pragma solidity ^0.8.0;

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

/// @title ContractWhitelist
/// @notice A helper contract that lets you add a list of whitelisted contracts that should be able to interact with restricted functions
abstract contract ContractWhitelist is Ownable {
    /// @dev contract => whitelisted or not
    mapping(address => bool) public whitelistedContracts;

    /*==== SETTERS ====*/

    /// @dev add to the contract whitelist
    /// @param _contract the address of the contract to add to the contract whitelist
    /// @return whether the contract was successfully added to the whitelist
    function addToContractWhitelist(address _contract) external onlyOwner returns (bool) {
        require(isContract(_contract), "ContractWhitelist: Address must be a contract address");
        require(!whitelistedContracts[_contract], "ContractWhitelist: Contract already whitelisted");

        whitelistedContracts[_contract] = true;

        emit AddToContractWhitelist(_contract);

        return true;
    }

    /// @dev remove from  the contract whitelist
    /// @param _contract the address of the contract to remove from the contract whitelist
    /// @return whether the contract was successfully removed from the whitelist
    function removeFromContractWhitelist(address _contract) external returns (bool) {
        require(whitelistedContracts[_contract], "ContractWhitelist: Contract not whitelisted");

        whitelistedContracts[_contract] = false;

        emit RemoveFromContractWhitelist(_contract);

        return true;
    }

    /* ==== MODIFIERS ==== */

    // Modifier is eligible sender modifier
    modifier isEligibleSender() {
        require(isWhitelisted(msg.sender), "ContractWhitelist: Contract must be whitelisted");
        _;
    }

    /*==== VIEWS ====*/

    /// @dev is the reciever whitelisted
    /// @param addr the address to check
    function isWhitelisted(address addr) public view returns (bool) {
        if (isContract(addr)) {
            return whitelistedContracts[addr];
        }
        return true;
    }

    /// @dev checks for contract or eoa addresses
    /// @param addr the address to check
    /// @return whether the passed address is a contract address
    function isContract(address addr) public view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(addr)
        }
        return size > 0;
    }

    /*==== EVENTS ====*/

    event AddToContractWhitelist(address indexed _contract);

    event RemoveFromContractWhitelist(address indexed _contract);
}

File 7 of 17 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

File 8 of 17 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

File 9 of 17 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

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

File 10 of 17 : IAccessControl.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

File 11 of 17 : 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 12 of 17 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

File 13 of 17 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

File 14 of 17 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

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

File 15 of 17 : 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 16 of 17 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)

pragma solidity ^0.8.0;

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

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

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

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

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

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

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

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 17 of 17 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

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

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

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

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000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000002d79883d2000000000000000000000000000000000000000000000000000000000000000000f4d6172696e6174656420554d414d49000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000066d554d414d490000000000000000000000000000000000000000000000000000

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

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

-----Decoded View---------------
Arg [0] : _UMAMI (address): 0x1622bf67e6e5747b81866fe0b85178a93c7f86e3
Arg [1] : name (string): Marinated UMAMI
Arg [2] : symbol (string): mUMAMI
Arg [3] : _depositLimit (uint256): 50000000000000

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000001622bf67e6e5747b81866fe0b85178a93c7f86e3
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 00000000000000000000000000000000000000000000000000002d79883d2000
Arg [4] : 000000000000000000000000000000000000000000000000000000000000000f
Arg [5] : 4d6172696e6174656420554d414d490000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [7] : 6d554d414d490000000000000000000000000000000000000000000000000000


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