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0x0b95C6C227fF0181E63b7c7C26b4b16f8Fc05aD9
 

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Transfer1094164892023-09-11 11:29:15277 days ago1694431755IN
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0 ETH0.000050471.0880628

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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x3dC60bE8...c40D33bb9
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
ExtraInterestBearingToken

Compiler Version
v0.8.18+commit.87f61d96

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 14 : ExtraInterestBearingToken.sol
// SPDX-License-Identifier: gpl-3.0
pragma solidity ^0.8.0;

import "../external/openzeppelin/contracts/utils/math/SafeMath.sol";
import "../external/openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../external/openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../external/openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../external/openzeppelin/contracts/security/ReentrancyGuard.sol";

import "../interfaces/IExtraInterestBearingToken.sol";
import "../interfaces/ILendingPool.sol";
import "../libraries/helpers/Errors.sol";

/**
 * @title ExtraInterestBearingToken(EToken)
 * @dev Implementation of the interest bearing token(eToken) for the extraFi Lending Pool
 * @author extraFi Team
 */
contract ExtraInterestBearingToken is
    IExtraInterestBearingToken,
    ReentrancyGuard,
    ERC20
{
    using SafeERC20 for IERC20;

    address public immutable lendingPool;
    address public immutable underlyingAsset;

    uint8 private _decimals;

    modifier onlyLendingPool() {
        require(
            msg.sender == lendingPool,
            Errors.LP_CALLER_MUST_BE_LENDING_POOL
        );
        _;
    }

    constructor(
        string memory name_,
        string memory symbol_,
        uint8 decimals_,
        address underlyingAsset_
    ) ERC20(name_, symbol_) {
        _decimals = decimals_;

        require(underlyingAsset_ != address(0), Errors.VL_ADDRESS_CANNOT_ZERO);
        underlyingAsset = underlyingAsset_;
        lendingPool = msg.sender;
    }

    /**
     * @dev Mints `amount` eTokens to `user`, only the LendingPool Contract can call this function.
     * @param user The address receiving the minted tokens
     * @param amount The amount of tokens getting minted
     */
    function mint(
        address user,
        uint256 amount
    ) external onlyLendingPool nonReentrant {
        _mint(user, amount);
        emit Mint(user, amount);
    }

    /**
     * @dev Burns eTokens from `user` and sends the underlying tokens to `receiverOfUnderlying`
     * Can only be called by the lending pool;
     * The `underlyingTokenAmount` should be calculated based on the current exchange rate in lending pool
     * @param receiverOfUnderlying The address that will receive the underlying tokens
     * @param eTokenAmount The amount of eTokens being burned
     * @param underlyingTokenAmount The amount of underlying tokens being transferred to user
     **/
    function burn(
        address receiverOfUnderlying,
        uint256 eTokenAmount,
        uint256 underlyingTokenAmount
    ) external onlyLendingPool nonReentrant {
        _burn(msg.sender, eTokenAmount);

        IERC20(underlyingAsset).safeTransfer(
            receiverOfUnderlying,
            underlyingTokenAmount
        );

        emit Burn(
            msg.sender,
            receiverOfUnderlying,
            eTokenAmount,
            underlyingTokenAmount
        );
    }

    /**
     * @dev Mints eTokens to the reserve's fee receiver
     * @param treasury The address of treasury
     * @param amount The amount of tokens getting minted
     */
    function mintToTreasury(
        address treasury,
        uint256 amount
    ) external onlyLendingPool nonReentrant {
        require(treasury != address(0), "zero address");
        _mint(treasury, amount);
        emit MintToTreasury(treasury, amount);
    }

    /**
     * @dev Transfers the underlying tokens to `target`. Called by the LendingPool to transfer
     * underlying tokens to target in functions like borrow(), withdraw()
     * @param target The recipient of the eTokens
     * @param amount The amount getting transferred
     * @return The amount transferred
     **/
    function transferUnderlyingTo(
        address target,
        uint256 amount
    ) external onlyLendingPool nonReentrant returns (uint256) {
        IERC20(underlyingAsset).safeTransfer(target, amount);
        return amount;
    }

    function decimals() public view override returns (uint8) {
        return _decimals;
    }
}

File 2 of 14 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

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

File 3 of 14 : ERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

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

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

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

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

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

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

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

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

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

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

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

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

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

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

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

        return true;
    }

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

        _beforeTokenTransfer(from, to, amount);

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

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

File 4 of 14 : draft-IERC20Permit.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

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

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

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

File 5 of 14 : IERC20Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

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

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

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

File 6 of 14 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

File 7 of 14 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

File 8 of 14 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

File 9 of 14 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

File 10 of 14 : SafeMath.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

File 11 of 14 : IExtraInterestBearingToken.sol
// SPDX-License-Identifier: gpl-3.0
pragma solidity ^0.8.0;

import "../external/openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IExtraInterestBearingToken is IERC20 {
    /**
     * @dev Emitted after the mint action
     * @param to The address receive tokens
     * @param value The amount being
     **/
    event Mint(address indexed to, uint256 value);

    /**
     * @dev Mints `amount` eTokens to `user`
     * @param user The address receiving the minted tokens
     * @param amount The amount of tokens getting minted
     */
    function mint(address user, uint256 amount) external;

    /**
     * @dev Emitted after eTokens are burned
     * @param from The owner of the eTokens, getting them burned
     * @param target The address that will receive the underlying tokens
     * @param eTokenAmount The amount being burned
     * @param underlyingTokenAmount The amount of underlying tokens being transferred to user
     **/
    event Burn(
        address indexed from,
        address indexed target,
        uint256 eTokenAmount,
        uint256 underlyingTokenAmount
    );

    /**
     * @dev Burns eTokens from `user` and sends the underlying tokens to `receiverOfUnderlying`
     * Can only be called by the lending pool;
     * The `underlyingTokenAmount` should be calculated based on the current exchange rate in lending pool
     * @param receiverOfUnderlying The address that will receive the underlying
     * @param eTokenAmount The amount of eTokens being burned
     * @param underlyingTokenAmount The amount of underlying tokens being transferred to user
     **/
    function burn(
        address receiverOfUnderlying,
        uint256 eTokenAmount,
        uint256 underlyingTokenAmount
    ) external;

    /**
     * @dev Emitted after the minted to treasury
     * @param treasury The treasury address
     * @param value The amount being minted
     **/
    event MintToTreasury(address indexed treasury, uint256 value);

    /**
     * @dev Mints eTokens to the treasury of the reserve
     * @param treasury The address of treasury
     * @param amount The amount of ftokens getting minted
     */
    function mintToTreasury(address treasury, uint256 amount) external;

    /**
     * @dev Transfers the underlying tokens to `target`. Called by the LendingPool to transfer
     * underlying tokens to target in functions like borrow(), withdraw()
     * @param target The recipient of the eTokens
     * @param amount The amount getting transferred
     * @return The amount transferred
     **/
    function transferUnderlyingTo(
        address target,
        uint256 amount
    ) external returns (uint256);
}

File 12 of 14 : ILendingPool.sol
// SPDX-License-Identifier: gpl-3.0
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import "../libraries/types/DataTypes.sol";

interface ILendingPool {
    function utilizationRateOfReserve(
        uint256 reserveId
    ) external view returns (uint256);

    function borrowingRateOfReserve(
        uint256 reserveId
    ) external view returns (uint256);

    function exchangeRateOfReserve(
        uint256 reserveId
    ) external view returns (uint256);

    function totalLiquidityOfReserve(
        uint256 reserveId
    ) external view returns (uint256 totalLiquidity);

    function totalBorrowsOfReserve(
        uint256 reserveId
    ) external view returns (uint256 totalBorrows);

    function getReserveIdOfDebt(uint256 debtId) external view returns (uint256);

    event InitReserve(
        address indexed reserve,
        address indexed eTokenAddress,
        address stakingAddress,
        uint256 id
    );
    /**
     * @dev Emitted on deposit()
     * @param reserveId The id of the reserve
     * @param user The address initiating the deposit
     * @param onBehalfOf The beneficiary of the deposit, receiving the eTokens
     * @param reserveAmount The reserve amount deposited
     * @param eTokenAmount The eToken amount received
     * @param referral The referral code used
     **/
    event Deposited(
        uint256 indexed reserveId,
        address user,
        address indexed onBehalfOf,
        uint256 reserveAmount,
        uint256 eTokenAmount,
        uint16 indexed referral
    );

    /**
     * @dev Emitted on redeem()
     * @param reserveId The id of the reserve
     * @param user The address initiating the withdrawal, owner of eTokens
     * @param to Address that will receive the underlying tokens
     * @param eTokenAmount The amount of eTokens to redeem
     * @param underlyingTokenAmount The amount of underlying tokens user received after redeem
     **/
    event Redeemed(
        uint256 indexed reserveId,
        address indexed user,
        address indexed to,
        uint256 eTokenAmount,
        uint256 underlyingTokenAmount
    );

    /**
     * @dev Emitted on borrow() when debt needs to be opened
     * @param reserveId The id of the reserve
     * @param contractAddress The address of the contract to initiate this borrow
     * @param onBehalfOf The beneficiary of the borrowing, receiving the tokens in his vaultPosition
     * @param amount The amount borrowed out
     **/
    event Borrow(
        uint256 indexed reserveId,
        address indexed contractAddress,
        address indexed onBehalfOf,
        uint256 amount
    );

    /**
     * @dev Emitted on repay()
     * @param reserveId The id of the reserve
     * @param onBehalfOf The user who repay debts in his vaultPosition
     * @param contractAddress The address of the contract to initiate this repay
     * @param amount The amount repaid
     **/
    event Repay(
        uint256 indexed reserveId,
        address indexed onBehalfOf,
        address indexed contractAddress,
        uint256 amount
    );

    /**
     * @dev Emitted when the pause is triggered.
     */
    event Paused();

    /**
     * @dev Emitted when the pause is lifted.
     */
    event UnPaused();

    event EnableVaultToBorrow(
        uint256 indexed vaultId,
        address indexed vaultAddress
    );

    event DisableVaultToBorrow(
        uint256 indexed vaultId,
        address indexed vaultAddress
    );

    event SetCreditsOfVault(
        uint256 indexed vaultId,
        address indexed vaultAddress,
        uint256 indexed reserveId,
        uint256 credit
    );

    event SetInterestRateConfig(
        uint256 indexed reserveId,
        uint16 utilizationA,
        uint16 borrowingRateA,
        uint16 utilizationB,
        uint16 borrowingRateB,
        uint16 maxBorrowingRate
    );

    event SetReserveCapacity(uint256 indexed reserveId, uint256 cap);

    event SetReserveFeeRate(uint256 indexed reserveId, uint256 feeRate);

    event ReserveActivated(uint256 indexed reserveId);
    event ReserveDeActivated(uint256 indexed reserveId);
    event ReserveFrozen(uint256 indexed reserveId);
    event ReserveUnFreeze(uint256 indexed reserveId);
    event ReserveBorrowEnabled(uint256 indexed reserveId);
    event ReserveBorrowDisabled(uint256 indexed reserveId);

    struct ReserveStatus {
        uint256 reserveId;
        address underlyingTokenAddress;
        address eTokenAddress;
        address stakingAddress;
        uint256 totalLiquidity;
        uint256 totalBorrows;
        uint256 exchangeRate;
        uint256 borrowingRate;
    }

    struct PositionStatus {
        uint256 reserveId;
        address user;
        uint256 eTokenStaked;
        uint256 eTokenUnStaked;
        uint256 liquidity;
    }

    function getReserveStatus(
        uint256[] calldata reserveIdArr
    ) external view returns (ReserveStatus[] memory statusArr);

    function getPositionStatus(
        uint256[] calldata reserveIdArr,
        address user
    ) external view returns (PositionStatus[] memory statusArr);

    /**
     * @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying eTokens.
     * - E.g. User deposits 100 USDC and gets in return for specific amount of eUSDC
     * the eUSDC amount depends on the exchange rate between USDC and eUSDC
     * @param reserveId The ID of the reserve
     * @param amount The amount of reserve to be deposited
     * @param onBehalfOf The address that will receive the eTokens, same as msg.sender if the user
     *   wants to receive them on his own wallet, or a different address if the beneficiary of eTokens
     *   is a different wallet
     * @param referralCode Code used to register the integrator originating the operation, for potential rewards.
     *   0 if the action is executed directly by the user, without any middle-man
     **/
    function deposit(
        uint256 reserveId,
        uint256 amount,
        address onBehalfOf,
        uint16 referralCode
    ) external payable returns (uint256);

    /**
     * @dev User redeems eTokens in exchange for the underlying asset
     * E.g. User has 100 eUSDC, and the current exchange rate of eUSDC and USDC is 1:1.1
     * he will receive 110 USDC after redeem 100eUSDC
     * @param reserveId The id of the reserve
     * @param eTokenAmount The amount of eTokens to redeem
     *   - If the amount is type(uint256).max, all of user's eTokens will be redeemed
     * @param to Address that will receive the underlying tokens, same as msg.sender if the user
     *   wants to receive it on his own wallet, or a different address if the beneficiary is a
     *   different wallet
     * @param receiveNativeETH If receive native ETH, set this param to true
     * @return The underlying token amount user finally receive
     **/
    function redeem(
        uint256 reserveId,
        uint256 eTokenAmount,
        address to,
        bool receiveNativeETH
    ) external returns (uint256);

    function newDebtPosition(uint256 reserveId) external returns (uint256);

    function getCurrentDebt(
        uint256 debtId
    ) external view returns (uint256 currentDebt, uint256 latestBorrowingIndex);

    /**
     * @dev Allows farming users to borrow a specific `amount` of the reserve underlying asset.
     * The user's borrowed tokens is transferred to the vault position contract and is recorded in the user's vault position(VaultPositionManageContract).
     * When debt ratio of user's vault position reach the liquidate limit,
     * the position will be liquidated and repay his debt(borrowed value + accrued interest)
     * @param onBehalfOf The beneficiary of the borrowing, receiving the tokens in his vaultPosition
     * @param debtId The debtPositionId
     * @param amount The amount to be borrowed
     */
    function borrow(
        address onBehalfOf,
        uint256 debtId,
        uint256 amount
    ) external;

    /**
     * @notice Repays borrowed underlying tokens to the reserve pool
     * The user's debt is recorded in the vault position(VaultPositionManageContract).
     * After this function successfully executed, user's debt should be reduced in VaultPositionManageContract.
     * @param onBehalfOf The user who repay debts in his vaultPosition
     * @param debtId The debtPositionId
     * @param amount The amount to be borrowed
     * @return The final amount repaid
     **/
    function repay(
        address onBehalfOf,
        uint256 debtId,
        uint256 amount
    ) external returns (uint256);

    function getUnderlyingTokenAddress(
        uint256 reserveId
    ) external view returns (address underlyingTokenAddress);

    function getETokenAddress(
        uint256 reserveId
    ) external view returns (address underlyingTokenAddress);

    function getStakingAddress(
        uint256 reserveId
    ) external view returns (address);

    function reserves(
        uint256
    )
        external
        view
        returns (
            uint256,
            uint256,
            uint256,
            address,
            address,
            address,
            uint256,
            DataTypes.InterestRateConfig memory,
            uint256,
            uint128,
            uint16,
            DataTypes.Flags memory
        );
}

File 13 of 14 : Errors.sol
// SPDX-License-Identifier: gpl-3.0
pragma solidity ^0.8.0;

/**
 * @title Errors library
 * @notice Defines the error messages emitted by the different contracts
 * @dev Error messages prefix glossary:
 *  - VL = ValidationLogic
 *  - VT = Vault
 *  - LP = LendingPool
 *  - P = Pausable
 */
library Errors {
    //contract specific errors
    string internal constant VL_TRANSACTION_TOO_OLD = "0"; // 'Transaction too old'
    string internal constant VL_NO_ACTIVE_RESERVE = "1"; // 'Action requires an active reserve'
    string internal constant VL_RESERVE_FROZEN = "2"; // 'Action cannot be performed because the reserve is frozen'
    string internal constant VL_CURRENT_AVAILABLE_LIQUIDITY_NOT_ENOUGH = "3"; // 'The current liquidity is not enough'
    string internal constant VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE = "4"; // 'User cannot withdraw more than the available balance'
    string internal constant VL_TRANSFER_NOT_ALLOWED = "5"; // 'Transfer cannot be allowed.'
    string internal constant VL_BORROWING_NOT_ENABLED = "6"; // 'Borrowing is not enabled'
    string internal constant VL_INVALID_DEBT_OWNER = "7"; // 'Invalid interest rate mode selected'
    string internal constant VL_BORROWING_CALLER_NOT_IN_WHITELIST = "8"; // 'The collateral balance is 0'
    string internal constant VL_DEPOSIT_TOO_MUCH = "9"; // 'Deposit too much'
    string internal constant VL_OUT_OF_CAPACITY = "10"; // 'There is not enough collateral to cover a new borrow'
    string internal constant VL_OUT_OF_CREDITS = "11"; // 'Out of credits, there is not enough credits to borrow'
    string internal constant VL_PERCENT_TOO_LARGE = "12"; // 'Percentage too large'
    string internal constant VL_ADDRESS_CANNOT_ZERO = "13"; // vault address cannot be zero
    string internal constant VL_VAULT_UN_ACTIVE = "14";
    string internal constant VL_VAULT_FROZEN = "15";
    string internal constant VL_VAULT_BORROWING_DISABLED = "16";
    string internal constant VL_NOT_WETH9 = "17";
    string internal constant VL_INSUFFICIENT_WETH9 = "18";
    string internal constant VL_INSUFFICIENT_TOKEN = "19";
    string internal constant VL_LIQUIDATOR_NOT_IN_WHITELIST = "20";
    string internal constant VL_COMPOUNDER_NOT_IN_WHITELIST = "21";
    string internal constant VL_VAULT_ALREADY_INITIALIZED = "22";
    string internal constant VL_TREASURY_ADDRESS_NOT_SET = "23";

    string internal constant VT_INVALID_RESERVE_ID = "40"; // invalid reserve id
    string internal constant VT_INVALID_POOL = "41"; // invalid uniswap v3 pool
    string internal constant VT_INVALID_VAULT_POSITION_MANAGER = "42"; // invalid vault position manager
    string internal constant VT_VAULT_POSITION_NOT_ACTIVE = "43"; // vault position is not active
    string internal constant VT_VAULT_POSITION_AUTO_COMPOUND_NOT_ENABLED = "44"; // 'auto compound not enabled'
    string internal constant VT_VAULT_POSITION_ID_INVALID = "45"; // 'VaultPositionId invalid'
    string internal constant VT_VAULT_PAUSED = "46"; // 'vault is paused'
    string internal constant VT_VAULT_FROZEN = "47"; // 'vault is frozen'
    string internal constant VT_VAULT_CALLBACK_INVALID_SENDER = "48"; // 'callback must be initiate by the vault self
    string internal constant VT_VAULT_DEBT_RATIO_TOO_LOW_TO_LIQUIDATE = "49"; // 'debt ratio haven't reach liquidate ratio'
    string internal constant VT_VAULT_POSITION_MANAGER_INVALID = "50"; // 'invalid vault manager'
    string internal constant VT_VAULT_POSITION_RANGE_STOP_DISABLED = "60"; // 'vault positions' range stop is disabled'
    string internal constant VT_VAULT_POSITION_RANGE_STOP_PRICE_INVALID = "61"; // 'invalid range stop price'
    string internal constant VT_VAULT_POSITION_OUT_OF_MAX_LEVERAGE = "62";
    string internal constant VT_VAULT_POSITION_SHARES_INVALID = "63";

    string internal constant LP_NOT_ENOUGH_LIQUIDITY_TO_BORROW = "80"; // 'There is not enough liquidity available to borrow'
    string internal constant LP_CALLER_MUST_BE_LENDING_POOL = "81"; // 'Caller must be lending pool contract'
    string internal constant LP_BORROW_INDEX_OVERFLOW = "82"; // 'The borrow index overflow'
    string internal constant LP_IS_PAUSED = "83"; // lending pool is paused
}

File 14 of 14 : DataTypes.sol
// SPDX-License-Identifier: gpl-3.0
pragma solidity ^0.8.0;

library DataTypes {
    struct DebtPositionData {
        uint256 reserveId;
        address owner;
        uint256 borrowed;
        uint256 borrowedIndex;
    }

    struct VaultPositionData {
        // manager of the position, who can adjust the position
        address manager;
        // tokenId of the v3 NFT position
        uint256 v3TokenId;
        // The debt positionId for token0
        uint256 debtPositionId0;
        // The debt share for token0
        uint256 debtShare0;
        // The debt positionId for token1
        uint256 debtPositionId1;
        // The debt share for token1
        uint256 debtShare1;
        // Total shares of this position
        uint256 totalShares;
    }

    // Interest Rate Config
    // The utilization rate and borrowing rate are expressed in RAY
    // utilizationB must gt utilizationA
    struct InterestRateConfig {
        // The utilization rate a, the end of the first slope on interest rate curve
        uint128 utilizationA;
        // The borrowing rate at utilization_rate_a
        uint128 borrowingRateA;
        // The utilization rate a, the end of the first slope on interest rate curve
        uint128 utilizationB;
        // The borrowing rate at utilization_rate_b
        uint128 borrowingRateB;
        // the max borrowing rate while the utilization is 100%
        uint128 maxBorrowingRate;
    }

    struct ReserveData {
        // variable borrow index.
        uint256 borrowingIndex;
        // the current borrow rate.
        uint256 currentBorrowingRate;
        // the total borrows of the reserve at a variable rate. Expressed in the currency decimals
        uint256 totalBorrows;
        // underlying token address
        address underlyingTokenAddress;
        // eToken address
        address eTokenAddress;
        // staking address
        address stakingAddress;
        // the capacity of the reserve pool
        uint256 reserveCapacity;
        // borrowing rate config
        InterestRateConfig borrowingRateConfig;
        // the id of the reserve. Represents the position in the list of the reserves
        uint256 id;
        uint128 lastUpdateTimestamp;
        // reserve fee charged, percent of the borrowing interest that is put into the treasury.
        uint16 reserveFeeRate;
        Flags flags;
    }

    struct Flags {
        bool isActive; // set to 1 if the reserve is properly configured
        bool frozen; // set to 1 if reserve is frozen, only allows repays and withdraws, but not deposits or new borrowings
        bool borrowingEnabled; // set to 1 if borrowing is enabled, allow borrowing from this pool
    }
}

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

Contract Security Audit

Contract ABI

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ddress","name":"target","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferUnderlyingTo","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"underlyingAsset","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

Deployed Bytecode

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