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// SPDX-License-Identifier: MIT

pragma solidity 0.8.26;

import { IERC20, ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; 
import { IERC3156FlashBorrower } from "@openzeppelin/contracts/interfaces/IERC3156FlashBorrower.sol";
import "../interfaces/core/IBeraborrowCore.sol";

/**
    @title Beraborrow Debt Token "Nectar"
    @notice CDP minted against collateral deposits within `DenManager`.
            This contract has a 1:n relationship with multiple deployments of `DenManager`,
            each of which hold one collateral type which may be used to mint this token.
 */
contract DebtToken is ERC20 {
    string public constant version = "1";

    // --- ERC 3156 Data ---
    bytes32 private constant _RETURN_VALUE = keccak256("ERC3156FlashBorrower.onFlashLoan");

    // --- Data for EIP2612 ---

    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant permitTypeHash = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
    // keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
    bytes32 private constant _TYPE_HASH = 0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f;

    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;

    mapping(address => uint256) private _nonces;

    IMetaBeraborrowCore private immutable _metaBeraborrowCore;
    address public gasPool;

    // --- Addresses ---
    /// @dev Whitelist of addresses that are allowed to mint and burn NECT.
    /// @dev Will make NECT multi-protocol in the future.
    mapping(address => bool) public liquidStabilityPools;
    mapping(address => bool) public borrowerOperations;
    mapping(address => bool) public factories;
    mapping(address => bool) public peripheries;
    mapping(address => bool) public denManagers;
    mapping(address => bool) public PSMBonds;

    // Amount of debt to be locked in gas pool on opening dens
    uint256 public DEBT_GAS_COMPENSATION;
    bool definitiveGasCompensation;

    event LiquidStabilityPoolWhitelisted(address indexed liquidStabilityPool, bool active);
    event BorrowerOperationsWhitelisted(address indexed borrowerOperations, bool active);
    event FactoryWhitelisted(address indexed factory, bool active);
    event PeripheryWhitelisted(address indexed periphery, bool active);
    event GasPoolSet(address indexed gasPool);
    event PSMBondSet(address indexed PSMBond);

    constructor(
        string memory _name,
        string memory _symbol,
        address _liquidStabilityPool,
        address _borrowerOperations,
        IMetaBeraborrowCore metaBeraborrowCore_,
        address _factory,
        address _gasPool,
        address _PSMBond,
        uint256 _gasCompensation
    ) ERC20(_name, _symbol) {
        if (_liquidStabilityPool == address(0) || _borrowerOperations == address(0) || _factory == address(0) || _gasPool == address(0)) {
            revert("Debt: 0 address");
        }

        liquidStabilityPools[_liquidStabilityPool] = true;
        borrowerOperations[_borrowerOperations] = true;
        factories[_factory] = true;
        PSMBonds[_PSMBond] = true;

        _metaBeraborrowCore = metaBeraborrowCore_;
        gasPool = _gasPool;

        DEBT_GAS_COMPENSATION = _gasCompensation;

        bytes32 hashedName = keccak256(bytes(_name));
        bytes32 hashedVersion = keccak256(bytes(version));

        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(_TYPE_HASH, hashedName, hashedVersion);
    }

    function enableDenManager(address _denManager) external {
        require(factories[msg.sender], "!Factory");
        denManagers[_denManager] = true;
    }

    // --- Functions for intra-Beraborrow calls ---

    function mintWithGasCompensation(address _account, uint256 _amount) external returns (bool) {
        require(borrowerOperations[msg.sender]);
        _mint(_account, _amount);
        _mint(gasPool, DEBT_GAS_COMPENSATION);

        return true;
    }

    function burnWithGasCompensation(address _account, uint256 _amount) external returns (bool) {
        require(borrowerOperations[msg.sender]);
        _burn(_account, _amount);
        _burn(gasPool, DEBT_GAS_COMPENSATION);

        return true;
    }

    function mint(address _account, uint256 _amount) external {
        require(borrowerOperations[msg.sender] || denManagers[msg.sender] || PSMBonds[msg.sender], "Debt: Caller not BO/DM");
        _mint(_account, _amount);
    }

    function burn(address _account, uint256 _amount) external {
        require(denManagers[msg.sender] || PSMBonds[msg.sender], "Debt: Caller not DenManager");
        _burn(_account, _amount);
    }
    
    function sendToPeriphery(address _sender, uint256 _amount) external {
        require(peripheries[msg.sender], "Debt: Caller not periphery");
        _transfer(_sender, msg.sender, _amount);
    }

    function sendToSP(address _sender, uint256 _amount) external {
        require(liquidStabilityPools[msg.sender], "Debt: Caller not StabilityPool");
        _transfer(_sender, msg.sender, _amount);
    }

    function returnFromPool(address _poolAddress, address _receiver, uint256 _amount) external {
        require(liquidStabilityPools[msg.sender] || denManagers[msg.sender], "Debt: Caller not DM/SP");
        _transfer(_poolAddress, _receiver, _amount);
    }

    // --- External functions ---

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _requireValidRecipient(recipient);
        return super.transfer(recipient, amount);
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _requireValidRecipient(recipient);
        return super.transferFrom(sender, recipient, amount);
    }

    // --- ERC 3156 Functions ---

    /**
     * @dev Returns the maximum amount of tokens available for loan.
     * @param token The address of the token that is requested.
     * @return The amount of token that can be loaned.
     */
    function maxFlashLoan(address token) public view returns (uint256) {
        return token == address(this) ? type(uint256).max - totalSupply() : 0;
    }

    /**
     * @dev Returns the fee applied when doing flash loans. This function calls
     * the {_flashFee} function which returns the fee applied when doing flash
     * loans.
     * @param token The token to be flash loaned.
     * @param amount The amount of tokens to be loaned.
     * @return The fees applied to the corresponding flash loan.
     */
    function flashFee(address token, uint256 amount) public view returns (uint256) {
        require(token == address(this), "ERC20FlashMint: wrong token");
        return _flashFee(amount);
    }

    /**
     * @dev Returns the fee applied when doing flash loans. By default this
     * implementation has 0 fees. This function can be overloaded to make
     * the flash loan mechanism deflationary.
     * @param amount The amount of tokens to be loaned.
     * @return The fees applied to the corresponding flash loan.
     */
    function _flashFee(uint256 amount) internal view returns (uint256) {
        uint effectiveFee = _metaBeraborrowCore.getPeripheryFlashLoanFee(msg.sender);

        return (amount * effectiveFee) / 1e4;
    }

    /**
     * @dev Performs a flash loan. New tokens are minted and sent to the
     * `receiver`, who is required to implement the {IERC3156FlashBorrower}
     * interface. By the end of the flash loan, the receiver is expected to own
     * amount + fee tokens and have them approved back to the token contract itself so
     * they can be burned.
     * @param receiver The receiver of the flash loan. Should implement the
     * {IERC3156FlashBorrower-onFlashLoan} interface.
     * @param token The token to be flash loaned. Only `address(this)` is
     * supported.
     * @param amount The amount of tokens to be loaned.
     * @param data An arbitrary datafield that is passed to the receiver.
     * @return `true` if the flash loan was successful.
     */
    // This function can reenter, but it doesn't pose a risk because it always preserves the property that the amount
    // minted at the beginning is always recovered and burned at the end, or else the entire function will revert.
    // slither-disable-next-line reentrancy-no-eth
    function flashLoan(
        IERC3156FlashBorrower receiver,
        address token,
        uint256 amount,
        bytes calldata data
    ) external returns (bool) {
        uint256 fee = flashFee(token, amount);
        require(amount <= maxFlashLoan(token), "ERC20FlashMint: amount exceeds maxFlashLoan");

        _mint(address(receiver), amount);
        require(
            receiver.onFlashLoan(msg.sender, token, amount, fee, data) == _RETURN_VALUE,
            "ERC20FlashMint: invalid return value"
        );
        _spendAllowance(address(receiver), address(this), amount + fee);
        _burn(address(receiver), amount);
        _transfer(address(receiver), _metaBeraborrowCore.feeReceiver(), fee);
        return true;
    }

    modifier onlyOwner() {
        require(_metaBeraborrowCore.owner() == msg.sender, "Caller not BeraborowCore::owner()");
        _;
    }

    // OnlyOwner setters

    /// @dev Allows NECT to be protocol transferable
    function whitelistLiquidStabilityPoolAddress(address _liquidStabilityPool, bool active) external onlyOwner {
        liquidStabilityPools[_liquidStabilityPool] = active;
        emit LiquidStabilityPoolWhitelisted(_liquidStabilityPool, active);
    }

    function whitelistBorrowerOperationsAddress(address _borrowerOperations, bool active) external onlyOwner {
        borrowerOperations[_borrowerOperations] = active;
        emit BorrowerOperationsWhitelisted(_borrowerOperations, active);
    }

    function whitelistFactoryAddress(address _factory, bool active) external onlyOwner {
        factories[_factory] = active;
        emit FactoryWhitelisted(_factory, active);
    }

    function whitelistPeripheryAddress(address _periphery, bool active) external onlyOwner {
        peripheries[_periphery] = active;
        emit PeripheryWhitelisted(_periphery, active);
    }

    function setGasPool(address _gasPool) external onlyOwner {
        gasPool = _gasPool;
        emit GasPoolSet(_gasPool);
    }

    function setDebtGasCompensation(uint256 _gasCompensation, bool _isFinalValue) external onlyOwner {
        require(!definitiveGasCompensation);

        DEBT_GAS_COMPENSATION = _gasCompensation;
        definitiveGasCompensation = _isFinalValue;
    }

    function whitelistPSMBond(address _PSMBond, bool active) external onlyOwner {
        PSMBonds[_PSMBond] = active;
        emit PSMBondSet(_PSMBond);
    }

    // --- EIP 2612 Functionality ---

    function DOMAIN_SEPARATOR() public view returns (bytes32) {
        if (block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function permit(
        address owner,
        address spender,
        uint256 amount,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        require(deadline >= block.timestamp, "Debt: expired deadline");
        bytes32 digest = keccak256(
            abi.encodePacked(
                "\x19\x01",
                DOMAIN_SEPARATOR(),
                keccak256(abi.encode(permitTypeHash, owner, spender, amount, _nonces[owner]++, deadline))
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        require(recoveredAddress == owner, "Debt: invalid signature");
        _approve(owner, spender, amount);
    }

    function nonces(address owner) external view returns (uint256) {
        // FOR EIP 2612
        return _nonces[owner];
    }

    // --- Internal operations ---

    function _buildDomainSeparator(bytes32 typeHash, bytes32 name_, bytes32 version_) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, name_, version_, block.chainid, address(this)));
    }

    // --- 'require' functions ---

    function _requireValidRecipient(address _recipient) internal view {
        require(
            _recipient != address(0) && _recipient != address(this),
            "Debt: Cannot transfer tokens directly to the Debt token contract or the zero address"
        );
        require(
            !denManagers[_recipient] && !borrowerOperations[_recipient],
            "Debt: Cannot transfer tokens directly to the DenManager or BorrowerOps"
        );
    }
}

// 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 {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (interfaces/IERC3156FlashBorrower.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC3156 FlashBorrower, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 *
 * _Available since v4.1._
 */
interface IERC3156FlashBorrower {
    /**
     * @dev Receive a flash loan.
     * @param initiator The initiator of the loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param fee The additional amount of tokens to repay.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     * @return The keccak256 hash of "IERC3156FlashBorrower.onFlashLoan"
     */
    function onFlashLoan(
        address initiator,
        address token,
        uint256 amount,
        uint256 fee,
        bytes calldata data
    ) external returns (bytes32);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.26;

import {IMetaBeraborrowCore} from "src/interfaces/core/IMetaBeraborrowCore.sol";

interface IBeraborrowCore {

    // --- Public variables ---
    function metaBeraborrowCore() external view returns (IMetaBeraborrowCore);
    function startTime() external view returns (uint256);
    function CCR() external view returns (uint256);
    function dmBootstrapPeriod() external view returns (uint64);
    function isPeriphery(address peripheryContract) external view returns (bool);

    // --- External functions ---

    function setPeripheryEnabled(address _periphery, bool _enabled) external;
    function setDMBootstrapPeriod(address dm, uint64 _bootstrapPeriod) external;
    function setNewCCR(uint256 _CCR) external;

    function priceFeed() external view returns (address);
    function owner() external view returns (address);
    function pendingOwner() external view returns (address);
    function guardian() external view returns (address);
    function manager() external view returns (address);
    function feeReceiver() external view returns (address);
    function paused() external view returns (bool);
    function lspBootstrapPeriod() external view returns (uint64);
    function getLspEntryFee(address rebalancer) external view returns (uint16);
    function getLspExitFee(address rebalancer) external view returns (uint16);
    function getPeripheryFlashLoanFee(address peripheryContract) external view returns (uint16);

    // --- Events ---
    event CCRSet(uint256 initialCCR);
    event DMBootstrapPeriodSet(address dm, uint64 bootstrapPeriod);
    event PeripheryEnabled(address indexed periphery, bool enabled);
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// 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);
}

// 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;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.26;

interface IMetaBeraborrowCore {
    // ---------------------------------
    // Structures
    // ---------------------------------
    struct FeeInfo {
        bool existsForNect;
        uint16 nectFee;
    }

    struct RebalancerFeeInfo {
        bool exists;
        uint16 entryFee;
        uint16 exitFee;
    }

    // ---------------------------------
    // Public constants
    // ---------------------------------
    function OWNERSHIP_TRANSFER_DELAY() external view returns (uint256);
    function DEFAULT_FLASH_LOAN_FEE() external view returns (uint16);

    // ---------------------------------
    // Public state variables
    // ---------------------------------
    function nect() external view returns (address);
    function lspEntryFee() external view returns (uint16);
    function lspExitFee() external view returns (uint16);

    function feeReceiver() external view returns (address);
    function priceFeed() external view returns (address);
    function owner() external view returns (address);
    function pendingOwner() external view returns (address);
    function ownershipTransferDeadline() external view returns (uint256);
    function manager() external view returns (address);
    function guardian() external view returns (address);
    function paused() external view returns (bool);
    function lspBootstrapPeriod() external view returns (uint64);

    // ---------------------------------
    // External functions
    // ---------------------------------
    function setFeeReceiver(address _feeReceiver) external;
    function setPriceFeed(address _priceFeed) external;
    function setGuardian(address _guardian) external;
    function setManager(address _manager) external;

    /**
     * @notice Global pause/unpause
     *         Pausing halts new deposits/borrowing across the protocol
     */
    function setPaused(bool _paused) external;

    /**
     * @notice Extend or change the LSP bootstrap period,
     *         after which certain protocol mechanics change
     */
    function setLspBootstrapPeriod(uint64 _bootstrapPeriod) external;

    /**
     * @notice Set a custom flash-loan fee for a given periphery contract
     * @param _periphery Target contract that will get this custom fee
     * @param _nectFee Fee in basis points (bp)
     * @param _existsForNect Whether this custom fee is used when the caller = `nect`
     */
    function setPeripheryFlashLoanFee(address _periphery, uint16 _nectFee, bool _existsForNect) external;

    /**
     * @notice Begin the ownership transfer process
     * @param newOwner The address proposed to be the new owner
     */
    function commitTransferOwnership(address newOwner) external;

    /**
     * @notice Finish the ownership transfer, after the mandatory delay
     */
    function acceptTransferOwnership() external;

    /**
     * @notice Revoke a pending ownership transfer
     */
    function revokeTransferOwnership() external;

    /**
     * @notice Look up a custom flash-loan fee for a specific periphery contract
     * @param peripheryContract The contract that might have a custom fee
     * @return The flash-loan fee in basis points
     */
    function getPeripheryFlashLoanFee(address peripheryContract) external view returns (uint16);

    /**
     * @notice Set / override entry & exit fees for a special rebalancer contract
     */
    function setRebalancerFee(address _rebalancer, uint16 _entryFee, uint16 _exitFee) external;

    /**
     * @notice Set the LSP entry fee globally
     * @param _fee Fee in basis points
     */
    function setEntryFee(uint16 _fee) external;

    /**
     * @notice Set the LSP exit fee globally
     * @param _fee Fee in basis points
     */
    function setExitFee(uint16 _fee) external;

    /**
     * @notice Look up the LSP entry fee for a rebalancer
     * @param rebalancer Possibly has a special fee
     * @return The entry fee in basis points
     */
    function getLspEntryFee(address rebalancer) external view returns (uint16);

    /**
     * @notice Look up the LSP exit fee for a rebalancer
     * @param rebalancer Possibly has a special fee
     * @return The exit fee in basis points
     */
    function getLspExitFee(address rebalancer) external view returns (uint16);

    // ---------------------------------
    // Events
    // ---------------------------------
    event NewOwnerCommitted(address indexed owner, address indexed pendingOwner, uint256 deadline);
    event NewOwnerAccepted(address indexed oldOwner, address indexed newOwner);
    event NewOwnerRevoked(address indexed owner, address indexed revokedOwner);

    event FeeReceiverSet(address indexed feeReceiver);
    event PriceFeedSet(address indexed priceFeed);
    event GuardianSet(address indexed guardian);
    event ManagerSet(address indexed manager);
    event PeripheryFlashLoanFee(address indexed periphery, uint16 nectFee);
    event LSPBootstrapPeriodSet(uint64 bootstrapPeriod);
    event RebalancerFees(address indexed rebalancer, uint16 entryFee, uint16 exitFee);
    event EntryFeeSet(uint16 fee);
    event ExitFeeSet(uint16 fee);
    event Paused();
    event Unpaused();
}

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    "@openzeppelin-upgradeable/contracts/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "solady/=lib/solady/src/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "chimera/=lib/chimera/src/",
    "ds-test/=lib/chimera/lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts-upgradeable/lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
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  "optimizer": {
    "enabled": true,
    "runs": 200
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  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
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      "*": [
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    }
  },
  "evmVersion": "cancun",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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00000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000000000000000000000160000000000000000000000000000000000000000000000000000000000000dead000000000000000000000000000000000000000000000000000000000000dead00000000000000000000000027393e8a6f8f2e32b870903279999c820e984dc7000000000000000000000000000000000000000000000000000000000000dead000000000000000000000000088d80a806b015a3047baf3e8d0a391b3d13e0c8000000000000000000000000000000000000000000000000000000000000dead0000000000000000000000000000000000000000000000008ac7230489e8000000000000000000000000000000000000000000000000000000000000000000064e6563746172000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044e45435400000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _name (string): Nectar
Arg [1] : _symbol (string): NECT
Arg [2] : _liquidStabilityPool (address): 0x000000000000000000000000000000000000dEaD
Arg [3] : _borrowerOperations (address): 0x000000000000000000000000000000000000dEaD
Arg [4] : metaBeraborrowCore_ (address): 0x27393e8a6f8f2e32B870903279999C820E984DC7
Arg [5] : _factory (address): 0x000000000000000000000000000000000000dEaD
Arg [6] : _gasPool (address): 0x088D80A806b015a3047baF3e8D0A391B3D13e0c8
Arg [7] : _PSMBond (address): 0x000000000000000000000000000000000000dEaD
Arg [8] : _gasCompensation (uint256): 10000000000000000000

-----Encoded View---------------
13 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000160
Arg [2] : 000000000000000000000000000000000000000000000000000000000000dead
Arg [3] : 000000000000000000000000000000000000000000000000000000000000dead
Arg [4] : 00000000000000000000000027393e8a6f8f2e32b870903279999c820e984dc7
Arg [5] : 000000000000000000000000000000000000000000000000000000000000dead
Arg [6] : 000000000000000000000000088d80a806b015a3047baf3e8d0a391b3d13e0c8
Arg [7] : 000000000000000000000000000000000000000000000000000000000000dead
Arg [8] : 0000000000000000000000000000000000000000000000008ac7230489e80000
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [10] : 4e65637461720000000000000000000000000000000000000000000000000000
Arg [11] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [12] : 4e45435400000000000000000000000000000000000000000000000000000000