// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/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: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/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;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    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));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    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");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    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");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation 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).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // 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 cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// File: @openzeppelin/contracts/utils/Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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: @openzeppelin/contracts/utils/math/SafeMath.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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: contracts/interfaces/IAaveIncentivesController.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;
pragma experimental ABIEncoderV2;

interface IAaveIncentivesController {
	event RewardsAccrued(address indexed user, uint256 amount);

	event RewardsClaimed(address indexed user, address indexed to, uint256 amount);

	event RewardsClaimed(address indexed user, address indexed to, address indexed claimer, uint256 amount);

	event ClaimerSet(address indexed user, address indexed claimer);

	/*
	 * @dev Returns the configuration of the distribution for a certain asset
	 * @param asset The address of the reference asset of the distribution
	 * @return The asset index, the emission per second and the last updated timestamp
	 **/
	function getAssetData(address asset) external view returns (uint256, uint256, uint256);

	/**
	 * @dev Whitelists an address to claim the rewards on behalf of another address
	 * @param user The address of the user
	 * @param claimer The address of the claimer
	 */
	function setClaimer(address user, address claimer) external;

	/**
	 * @dev Returns the whitelisted claimer for a certain address (0x0 if not set)
	 * @param user The address of the user
	 * @return The claimer address
	 */
	function getClaimer(address user) external view returns (address);

	/**
	 * @dev Configure assets for a certain rewards emission
	 * @param assets The assets to incentivize
	 * @param emissionsPerSecond The emission for each asset
	 */
	function configureAssets(address[] calldata assets, uint256[] calldata emissionsPerSecond) external;

	/**
	 * @dev Called by the corresponding asset on any update that affects the rewards distribution
	 * @param user The address of the user
	 **/
	function handleActionBefore(address user) external;

	/**
	 * @dev Called by the corresponding asset on any update that affects the rewards distribution
	 * @param user The address of the user
	 * @param userBalance The balance of the user of the asset in the lending pool
	 * @param totalSupply The total supply of the asset in the lending pool
	 **/
	function handleActionAfter(address user, uint256 userBalance, uint256 totalSupply) external;

	/**
	 * @dev Returns the total of rewards of an user, already accrued + not yet accrued
	 * @param user The address of the user
	 * @return The rewards
	 **/
	function getRewardsBalance(address[] calldata assets, address user) external view returns (uint256);

	/**
	 * @dev Claims reward for an user, on all the assets of the lending pool, accumulating the pending rewards
	 * @param amount Amount of rewards to claim
	 * @param to Address that will be receiving the rewards
	 * @return Rewards claimed
	 **/
	function claimRewards(address[] calldata assets, uint256 amount, address to) external returns (uint256);

	/**
	 * @dev Claims reward for an user on behalf, on all the assets of the lending pool, accumulating the pending rewards. The caller must
	 * be whitelisted via "allowClaimOnBehalf" function by the RewardsAdmin role manager
	 * @param amount Amount of rewards to claim
	 * @param user Address to check and claim rewards
	 * @param to Address that will be receiving the rewards
	 * @return Rewards claimed
	 **/
	function claimRewardsOnBehalf(
		address[] calldata assets,
		uint256 amount,
		address user,
		address to
	) external returns (uint256);

	/**
	 * @dev returns the unclaimed rewards of the user
	 * @param user the address of the user
	 * @return the unclaimed user rewards
	 */
	function getUserUnclaimedRewards(address user) external view returns (uint256);

	/**
	 * @dev returns the unclaimed rewards of the user
	 * @param user the address of the user
	 * @param asset The asset to incentivize
	 * @return the user index for the asset
	 */
	function getUserAssetData(address user, address asset) external view returns (uint256);

	/**
	 * @dev for backward compatibility with previous implementation of the Incentives controller
	 */
	function REWARD_TOKEN() external view returns (address);

	/**
	 * @dev for backward compatibility with previous implementation of the Incentives controller
	 */
	function PRECISION() external view returns (uint8);

	/**
	 * @dev Gets the distribution end timestamp of the emissions
	 */
	function DISTRIBUTION_END() external view returns (uint256);
}

// File: contracts/interfaces/IAToken.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IScaledBalanceToken} from "./IScaledBalanceToken.sol";
import {IInitializableAToken} from "./IInitializableAToken.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";

interface IAToken is IERC20, IScaledBalanceToken, IInitializableAToken {
	/**
	 * @dev Emitted after the mint action
	 * @param from The address performing the mint
	 * @param value The amount being
	 * @param index The new liquidity index of the reserve
	 **/
	event Mint(address indexed from, uint256 value, uint256 index);

	/**
	 * @dev Mints `amount` aTokens to `user`
	 * @param user The address receiving the minted tokens
	 * @param amount The amount of tokens getting minted
	 * @param index The new liquidity index of the reserve
	 * @return `true` if the the previous balance of the user was 0
	 */
	function mint(address user, uint256 amount, uint256 index) external returns (bool);

	/**
	 * @dev Emitted after aTokens are burned
	 * @param from The owner of the aTokens, getting them burned
	 * @param target The address that will receive the underlying
	 * @param value The amount being burned
	 * @param index The new liquidity index of the reserve
	 **/
	event Burn(address indexed from, address indexed target, uint256 value, uint256 index);

	/**
	 * @dev Emitted during the transfer action
	 * @param from The user whose tokens are being transferred
	 * @param to The recipient
	 * @param value The amount being transferred
	 * @param index The new liquidity index of the reserve
	 **/
	event BalanceTransfer(address indexed from, address indexed to, uint256 value, uint256 index);

	/**
	 * @dev Burns aTokens from `user` and sends the equivalent amount of underlying to `receiverOfUnderlying`
	 * @param user The owner of the aTokens, getting them burned
	 * @param receiverOfUnderlying The address that will receive the underlying
	 * @param amount The amount being burned
	 * @param index The new liquidity index of the reserve
	 **/
	function burn(address user, address receiverOfUnderlying, uint256 amount, uint256 index) external;

	/**
	 * @dev Mints aTokens to the reserve treasury
	 * @param amount The amount of tokens getting minted
	 * @param index The new liquidity index of the reserve
	 */
	function mintToTreasury(uint256 amount, uint256 index) external;

	/**
	 * @dev Transfers aTokens in the event of a borrow being liquidated, in case the liquidators reclaims the aToken
	 * @param from The address getting liquidated, current owner of the aTokens
	 * @param to The recipient
	 * @param value The amount of tokens getting transferred
	 **/
	function transferOnLiquidation(address from, address to, uint256 value) external;

	/**
	 * @dev Transfers the underlying asset to `target`. Used by the LendingPool to transfer
	 * assets in borrow(), withdraw() and flashLoan()
	 * @param user The recipient of the underlying
	 * @param amount The amount getting transferred
	 * @return The amount transferred
	 **/
	function transferUnderlyingTo(address user, uint256 amount) external returns (uint256);

	/**
	 * @dev Invoked to execute actions on the aToken side after a repayment.
	 * @param user The user executing the repayment
	 * @param amount The amount getting repaid
	 **/
	function handleRepayment(address user, uint256 amount) external;

	/**
	 * @dev Returns the address of the incentives controller contract
	 **/
	function getIncentivesController() external view returns (IAaveIncentivesController);

	/**
	 * @dev Returns the address of the underlying asset of this aToken (E.g. WETH for aWETH)
	 **/
	function UNDERLYING_ASSET_ADDRESS() external view returns (address);
}

// File: contracts/interfaces/IInitializableAToken.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

import {ILendingPool} from "./ILendingPool.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";

/**
 * @title IInitializableAToken
 * @notice Interface for the initialize function on AToken
 * @author Aave
 **/
interface IInitializableAToken {
	/**
	 * @dev Emitted when an aToken is initialized
	 * @param underlyingAsset The address of the underlying asset
	 * @param pool The address of the associated lending pool
	 * @param treasury The address of the treasury
	 * @param incentivesController The address of the incentives controller for this aToken
	 * @param aTokenDecimals the decimals of the underlying
	 * @param aTokenName the name of the aToken
	 * @param aTokenSymbol the symbol of the aToken
	 * @param params A set of encoded parameters for additional initialization
	 **/
	event Initialized(
		address indexed underlyingAsset,
		address indexed pool,
		address treasury,
		address incentivesController,
		uint8 aTokenDecimals,
		string aTokenName,
		string aTokenSymbol,
		bytes params
	);

	/**
	 * @dev Initializes the aToken
	 * @param pool The address of the lending pool where this aToken will be used
	 * @param treasury The address of the Aave treasury, receiving the fees on this aToken
	 * @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
	 * @param incentivesController The smart contract managing potential incentives distribution
	 * @param aTokenDecimals The decimals of the aToken, same as the underlying asset's
	 * @param aTokenName The name of the aToken
	 * @param aTokenSymbol The symbol of the aToken
	 */
	function initialize(
		ILendingPool pool,
		address treasury,
		address underlyingAsset,
		IAaveIncentivesController incentivesController,
		uint8 aTokenDecimals,
		string calldata aTokenName,
		string calldata aTokenSymbol,
		bytes calldata params
	) external;
}

// File: contracts/interfaces/IInitializableDebtToken.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

import {ILendingPool} from "./ILendingPool.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";

/**
 * @title IInitializableDebtToken
 * @notice Interface for the initialize function common between debt tokens
 * @author Aave
 **/
interface IInitializableDebtToken {
	/**
	 * @dev Emitted when a debt token is initialized
	 * @param underlyingAsset The address of the underlying asset
	 * @param pool The address of the associated lending pool
	 * @param incentivesController The address of the incentives controller for this aToken
	 * @param debtTokenDecimals the decimals of the debt token
	 * @param debtTokenName the name of the debt token
	 * @param debtTokenSymbol the symbol of the debt token
	 * @param params A set of encoded parameters for additional initialization
	 **/
	event Initialized(
		address indexed underlyingAsset,
		address indexed pool,
		address incentivesController,
		uint8 debtTokenDecimals,
		string debtTokenName,
		string debtTokenSymbol,
		bytes params
	);

	/**
	 * @dev Initializes the debt token.
	 * @param pool The address of the lending pool where this aToken will be used
	 * @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
	 * @param incentivesController The smart contract managing potential incentives distribution
	 * @param debtTokenDecimals The decimals of the debtToken, same as the underlying asset's
	 * @param debtTokenName The name of the token
	 * @param debtTokenSymbol The symbol of the token
	 */
	function initialize(
		ILendingPool pool,
		address underlyingAsset,
		IAaveIncentivesController incentivesController,
		uint8 debtTokenDecimals,
		string memory debtTokenName,
		string memory debtTokenSymbol,
		bytes calldata params
	) external;
}

// File: contracts/interfaces/ILendingPool.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;
pragma experimental ABIEncoderV2;

import {ILendingPoolAddressesProvider} from "./ILendingPoolAddressesProvider.sol";
import {DataTypes} from "../lending/libraries/types/DataTypes.sol";

interface ILendingPool {
	/**
	 * @dev Emitted on deposit()
	 * @param reserve The address of the underlying asset of the reserve
	 * @param user The address initiating the deposit
	 * @param onBehalfOf The beneficiary of the deposit, receiving the aTokens
	 * @param amount The amount deposited
	 * @param referral The referral code used
	 **/
	event Deposit(
		address indexed reserve,
		address user,
		address indexed onBehalfOf,
		uint256 amount,
		uint16 indexed referral
	);

	/**
	 * @dev Emitted on withdraw()
	 * @param reserve The address of the underlyng asset being withdrawn
	 * @param user The address initiating the withdrawal, owner of aTokens
	 * @param to Address that will receive the underlying
	 * @param amount The amount to be withdrawn
	 **/
	event Withdraw(address indexed reserve, address indexed user, address indexed to, uint256 amount);

	/**
	 * @dev Emitted on borrow() and flashLoan() when debt needs to be opened
	 * @param reserve The address of the underlying asset being borrowed
	 * @param user The address of the user initiating the borrow(), receiving the funds on borrow() or just
	 * initiator of the transaction on flashLoan()
	 * @param onBehalfOf The address that will be getting the debt
	 * @param amount The amount borrowed out
	 * @param borrowRateMode The rate mode: 1 for Stable, 2 for Variable
	 * @param borrowRate The numeric rate at which the user has borrowed
	 * @param referral The referral code used
	 **/
	event Borrow(
		address indexed reserve,
		address user,
		address indexed onBehalfOf,
		uint256 amount,
		uint256 borrowRateMode,
		uint256 borrowRate,
		uint16 indexed referral
	);

	/**
	 * @dev Emitted on repay()
	 * @param reserve The address of the underlying asset of the reserve
	 * @param user The beneficiary of the repayment, getting his debt reduced
	 * @param repayer The address of the user initiating the repay(), providing the funds
	 * @param amount The amount repaid
	 **/
	event Repay(address indexed reserve, address indexed user, address indexed repayer, uint256 amount);

	/**
	 * @dev Emitted on swapBorrowRateMode()
	 * @param reserve The address of the underlying asset of the reserve
	 * @param user The address of the user swapping his rate mode
	 * @param rateMode The rate mode that the user wants to swap to
	 **/
	event Swap(address indexed reserve, address indexed user, uint256 rateMode);

	/**
	 * @dev Emitted on setUserUseReserveAsCollateral()
	 * @param reserve The address of the underlying asset of the reserve
	 * @param user The address of the user enabling the usage as collateral
	 **/
	event ReserveUsedAsCollateralEnabled(address indexed reserve, address indexed user);

	/**
	 * @dev Emitted on setUserUseReserveAsCollateral()
	 * @param reserve The address of the underlying asset of the reserve
	 * @param user The address of the user enabling the usage as collateral
	 **/
	event ReserveUsedAsCollateralDisabled(address indexed reserve, address indexed user);

	/**
	 * @dev Emitted on rebalanceStableBorrowRate()
	 * @param reserve The address of the underlying asset of the reserve
	 * @param user The address of the user for which the rebalance has been executed
	 **/
	event RebalanceStableBorrowRate(address indexed reserve, address indexed user);

	/**
	 * @dev Emitted on flashLoan()
	 * @param target The address of the flash loan receiver contract
	 * @param initiator The address initiating the flash loan
	 * @param asset The address of the asset being flash borrowed
	 * @param amount The amount flash borrowed
	 * @param premium The fee flash borrowed
	 * @param referralCode The referral code used
	 **/
	event FlashLoan(
		address indexed target,
		address indexed initiator,
		address indexed asset,
		uint256 amount,
		uint256 premium,
		uint16 referralCode
	);

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

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

	/**
	 * @dev Emitted when a borrower is liquidated. This event is emitted by the LendingPool via
	 * LendingPoolCollateral manager using a DELEGATECALL
	 * This allows to have the events in the generated ABI for LendingPool.
	 * @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
	 * @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
	 * @param user The address of the borrower getting liquidated
	 * @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
	 * @param liquidatedCollateralAmount The amount of collateral received by the liiquidator
	 * @param liquidator The address of the liquidator
	 * @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants
	 * to receive the underlying collateral asset directly
	 **/
	event LiquidationCall(
		address indexed collateralAsset,
		address indexed debtAsset,
		address indexed user,
		uint256 debtToCover,
		uint256 liquidatedCollateralAmount,
		address liquidator,
		bool receiveAToken
	);

	/**
	 * @dev Emitted when the state of a reserve is updated. NOTE: This event is actually declared
	 * in the ReserveLogic library and emitted in the updateInterestRates() function. Since the function is internal,
	 * the event will actually be fired by the LendingPool contract. The event is therefore replicated here so it
	 * gets added to the LendingPool ABI
	 * @param reserve The address of the underlying asset of the reserve
	 * @param liquidityRate The new liquidity rate
	 * @param stableBorrowRate The new stable borrow rate
	 * @param variableBorrowRate The new variable borrow rate
	 * @param liquidityIndex The new liquidity index
	 * @param variableBorrowIndex The new variable borrow index
	 **/
	event ReserveDataUpdated(
		address indexed reserve,
		uint256 liquidityRate,
		uint256 stableBorrowRate,
		uint256 variableBorrowRate,
		uint256 liquidityIndex,
		uint256 variableBorrowIndex
	);

	function initialize(ILendingPoolAddressesProvider provider) external;

	/**
	 * @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
	 * - E.g. User deposits 100 USDC and gets in return 100 aUSDC
	 * @param asset The address of the underlying asset to deposit
	 * @param amount The amount to be deposited
	 * @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
	 *   wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
	 *   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(address asset, uint256 amount, address onBehalfOf, uint16 referralCode) external;

	function depositWithAutoDLP(address asset, uint256 amount, address onBehalfOf, uint16 referralCode) external;

	/**
	 * @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned
	 * E.g. User has 100 aUSDC, calls withdraw() and receives 100 USDC, burning the 100 aUSDC
	 * @param asset The address of the underlying asset to withdraw
	 * @param amount The underlying amount to be withdrawn
	 *   - Send the value type(uint256).max in order to withdraw the whole aToken balance
	 * @param to Address that will receive the underlying, 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
	 * @return The final amount withdrawn
	 **/
	function withdraw(address asset, uint256 amount, address to) external returns (uint256);

	/**
	 * @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
	 * already deposited enough collateral, or he was given enough allowance by a credit delegator on the
	 * corresponding debt token (StableDebtToken or VariableDebtToken)
	 * - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet
	 *   and 100 stable/variable debt tokens, depending on the `interestRateMode`
	 * @param asset The address of the underlying asset to borrow
	 * @param amount The amount to be borrowed
	 * @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable
	 * @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
	 * @param onBehalfOf Address of the user who will receive the debt. Should be the address of the borrower itself
	 * calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
	 * if he has been given credit delegation allowance
	 **/
	function borrow(
		address asset,
		uint256 amount,
		uint256 interestRateMode,
		uint16 referralCode,
		address onBehalfOf
	) external;

	/**
	 * @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned
	 * - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address
	 * @param asset The address of the borrowed underlying asset previously borrowed
	 * @param amount The amount to repay
	 * - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
	 * @param rateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
	 * @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the
	 * user calling the function if he wants to reduce/remove his own debt, or the address of any other
	 * other borrower whose debt should be removed
	 * @return The final amount repaid
	 **/
	function repay(address asset, uint256 amount, uint256 rateMode, address onBehalfOf) external returns (uint256);

	/**
	 * @dev Allows a borrower to swap his debt between stable and variable mode, or viceversa
	 * @param asset The address of the underlying asset borrowed
	 * @param rateMode The rate mode that the user wants to swap to
	 **/
	function swapBorrowRateMode(address asset, uint256 rateMode) external;

	/**
	 * @dev Rebalances the stable interest rate of a user to the current stable rate defined on the reserve.
	 * - Users can be rebalanced if the following conditions are satisfied:
	 *     1. Usage ratio is above 95%
	 *     2. the current deposit APY is below REBALANCE_UP_THRESHOLD * maxVariableBorrowRate, which means that too much has been
	 *        borrowed at a stable rate and depositors are not earning enough
	 * @param asset The address of the underlying asset borrowed
	 * @param user The address of the user to be rebalanced
	 **/
	function rebalanceStableBorrowRate(address asset, address user) external;

	/**
	 * @dev Allows depositors to enable/disable a specific deposited asset as collateral
	 * @param asset The address of the underlying asset deposited
	 * @param useAsCollateral `true` if the user wants to use the deposit as collateral, `false` otherwise
	 **/
	function setUserUseReserveAsCollateral(address asset, bool useAsCollateral) external;

	/**
	 * @dev Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1
	 * - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives
	 *   a proportionally amount of the `collateralAsset` plus a bonus to cover market risk
	 * @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
	 * @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
	 * @param user The address of the borrower getting liquidated
	 * @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
	 * @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants
	 * to receive the underlying collateral asset directly
	 **/
	function liquidationCall(
		address collateralAsset,
		address debtAsset,
		address user,
		uint256 debtToCover,
		bool receiveAToken
	) external;

	/**
	 * @dev Allows smartcontracts to access the liquidity of the pool within one transaction,
	 * as long as the amount taken plus a fee is returned.
	 * IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept into consideration.
	 * For further details please visit https://developers.aave.com
	 * @param receiverAddress The address of the contract receiving the funds, implementing the IFlashLoanReceiver interface
	 * @param assets The addresses of the assets being flash-borrowed
	 * @param amounts The amounts amounts being flash-borrowed
	 * @param modes Types of the debt to open if the flash loan is not returned:
	 *   0 -> Don't open any debt, just revert if funds can't be transferred from the receiver
	 *   1 -> Open debt at stable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
	 *   2 -> Open debt at variable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
	 * @param onBehalfOf The address  that will receive the debt in the case of using on `modes` 1 or 2
	 * @param params Variadic packed params to pass to the receiver as extra information
	 * @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 flashLoan(
		address receiverAddress,
		address[] calldata assets,
		uint256[] calldata amounts,
		uint256[] calldata modes,
		address onBehalfOf,
		bytes calldata params,
		uint16 referralCode
	) external;

	/**
	 * @dev Returns the user account data across all the reserves
	 * @param user The address of the user
	 * @return totalCollateralETH the total collateral in ETH of the user
	 * @return totalDebtETH the total debt in ETH of the user
	 * @return availableBorrowsETH the borrowing power left of the user
	 * @return currentLiquidationThreshold the liquidation threshold of the user
	 * @return ltv the loan to value of the user
	 * @return healthFactor the current health factor of the user
	 **/
	function getUserAccountData(
		address user
	)
		external
		view
		returns (
			uint256 totalCollateralETH,
			uint256 totalDebtETH,
			uint256 availableBorrowsETH,
			uint256 currentLiquidationThreshold,
			uint256 ltv,
			uint256 healthFactor
		);

	function initReserve(
		address reserve,
		address aTokenAddress,
		address stableDebtAddress,
		address variableDebtAddress,
		address interestRateStrategyAddress
	) external;

	function setReserveInterestRateStrategyAddress(address reserve, address rateStrategyAddress) external;

	function setConfiguration(address reserve, uint256 configuration) external;

	/**
	 * @dev Returns the configuration of the reserve
	 * @param asset The address of the underlying asset of the reserve
	 * @return The configuration of the reserve
	 **/
	function getConfiguration(address asset) external view returns (DataTypes.ReserveConfigurationMap memory);

	/**
	 * @dev Returns the configuration of the user across all the reserves
	 * @param user The user address
	 * @return The configuration of the user
	 **/
	function getUserConfiguration(address user) external view returns (DataTypes.UserConfigurationMap memory);

	/**
	 * @dev Returns the normalized income normalized income of the reserve
	 * @param asset The address of the underlying asset of the reserve
	 * @return The reserve's normalized income
	 */
	function getReserveNormalizedIncome(address asset) external view returns (uint256);

	/**
	 * @dev Returns the normalized variable debt per unit of asset
	 * @param asset The address of the underlying asset of the reserve
	 * @return The reserve normalized variable debt
	 */
	function getReserveNormalizedVariableDebt(address asset) external view returns (uint256);

	/**
	 * @dev Returns the state and configuration of the reserve
	 * @param asset The address of the underlying asset of the reserve
	 * @return The state of the reserve
	 **/
	function getReserveData(address asset) external view returns (DataTypes.ReserveData memory);

	function finalizeTransfer(
		address asset,
		address from,
		address to,
		uint256 amount,
		uint256 balanceFromAfter,
		uint256 balanceToBefore
	) external;

	function getReservesList() external view returns (address[] memory);

	function getAddressesProvider() external view returns (ILendingPoolAddressesProvider);

	function setPause(bool val) external;

	function paused() external view returns (bool);
}

// File: contracts/interfaces/ILendingPoolAddressesProvider.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

/**
 * @title LendingPoolAddressesProvider contract
 * @dev Main registry of addresses part of or connected to the protocol, including permissioned roles
 * - Acting also as factory of proxies and admin of those, so with right to change its implementations
 * - Owned by the Aave Governance
 * @author Aave
 **/
interface ILendingPoolAddressesProvider {
	event MarketIdSet(string newMarketId);
	event LendingPoolUpdated(address indexed newAddress);
	event ConfigurationAdminUpdated(address indexed newAddress);
	event EmergencyAdminUpdated(address indexed newAddress);
	event LendingPoolConfiguratorUpdated(address indexed newAddress);
	event LendingPoolCollateralManagerUpdated(address indexed newAddress);
	event PriceOracleUpdated(address indexed newAddress);
	event LendingRateOracleUpdated(address indexed newAddress);
	event ProxyCreated(bytes32 id, address indexed newAddress);
	event AddressSet(bytes32 id, address indexed newAddress, bool hasProxy);

	function getMarketId() external view returns (string memory);

	function setMarketId(string calldata marketId) external;

	function setAddress(bytes32 id, address newAddress) external;

	function setAddressAsProxy(bytes32 id, address impl) external;

	function getAddress(bytes32 id) external view returns (address);

	function getLendingPool() external view returns (address);

	function setLendingPoolImpl(address pool) external;

	function getLendingPoolConfigurator() external view returns (address);

	function setLendingPoolConfiguratorImpl(address configurator) external;

	function getLendingPoolCollateralManager() external view returns (address);

	function setLendingPoolCollateralManager(address manager) external;

	function getPoolAdmin() external view returns (address);

	function setPoolAdmin(address admin) external;

	function getEmergencyAdmin() external view returns (address);

	function setEmergencyAdmin(address admin) external;

	function getPriceOracle() external view returns (address);

	function setPriceOracle(address priceOracle) external;

	function getLendingRateOracle() external view returns (address);

	function setLendingRateOracle(address lendingRateOracle) external;

	function getLiquidationFeeTo() external view returns (address);

	function setLiquidationFeeTo(address liquidationFeeTo) external;
}

// File: contracts/interfaces/ILendingPoolCollateralManager.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

/**
 * @title ILendingPoolCollateralManager
 * @author Aave
 * @notice Defines the actions involving management of collateral in the protocol.
 **/
interface ILendingPoolCollateralManager {
	/**
	 * @dev Emitted when a borrower is liquidated
	 * @param collateral The address of the collateral being liquidated
	 * @param principal The address of the reserve
	 * @param user The address of the user being liquidated
	 * @param debtToCover The total amount liquidated
	 * @param liquidatedCollateralAmount The amount of collateral being liquidated
	 * @param liquidator The address of the liquidator
	 * @param receiveAToken true if the liquidator wants to receive aTokens, false otherwise
	 **/
	event LiquidationCall(
		address indexed collateral,
		address indexed principal,
		address indexed user,
		uint256 debtToCover,
		uint256 liquidatedCollateralAmount,
		address liquidator,
		bool receiveAToken,
		address liquidationFeeTo
	);

	/**
	 * @dev Emitted when a reserve is disabled as collateral for an user
	 * @param reserve The address of the reserve
	 * @param user The address of the user
	 **/
	event ReserveUsedAsCollateralDisabled(address indexed reserve, address indexed user);

	/**
	 * @dev Emitted when a reserve is enabled as collateral for an user
	 * @param reserve The address of the reserve
	 * @param user The address of the user
	 **/
	event ReserveUsedAsCollateralEnabled(address indexed reserve, address indexed user);

	/**
	 * @dev Users can invoke this function to liquidate an undercollateralized position.
	 * @param collateral The address of the collateral to liquidated
	 * @param principal The address of the principal reserve
	 * @param user The address of the borrower
	 * @param debtToCover The amount of principal that the liquidator wants to repay
	 * @param receiveAToken true if the liquidators wants to receive the aTokens, false if
	 * he wants to receive the underlying asset directly
	 **/
	function liquidationCall(
		address collateral,
		address principal,
		address user,
		uint256 debtToCover,
		bool receiveAToken,
		address liquidationFeeTo
	) external returns (uint256, string memory);
}

// File: contracts/interfaces/ILeverager.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;
pragma experimental ABIEncoderV2;

interface ILeverager {
	function wethToZap(address user) external view returns (uint256);

	function zapWETHWithBorrow(uint256 amount, address borrower) external returns (uint256 liquidity);
}

// File: contracts/interfaces/IPriceOracleGetter.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

/**
 * @title IPriceOracleGetter interface
 * @notice Interface for the Aave price oracle.
 **/

interface IPriceOracleGetter {
	/**
	 * @dev returns the asset price in ETH
	 * @param asset the address of the asset
	 * @return the ETH price of the asset
	 **/
	function getAssetPrice(address asset) external view returns (uint256);
}

// File: contracts/interfaces/IReserveInterestRateStrategy.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

/**
 * @title IReserveInterestRateStrategyInterface interface
 * @dev Interface for the calculation of the interest rates
 * @author Aave
 */
interface IReserveInterestRateStrategy {
	function baseVariableBorrowRate() external view returns (uint256);

	function getMaxVariableBorrowRate() external view returns (uint256);

	function calculateInterestRates(
		address reserve,
		uint256 availableLiquidity,
		uint256 totalStableDebt,
		uint256 totalVariableDebt,
		uint256 averageStableBorrowRate,
		uint256 reserveFactor
	) external view returns (uint256, uint256, uint256);

	function calculateInterestRates(
		address reserve,
		address aToken,
		uint256 liquidityAdded,
		uint256 liquidityTaken,
		uint256 totalStableDebt,
		uint256 totalVariableDebt,
		uint256 averageStableBorrowRate,
		uint256 reserveFactor
	) external view returns (uint256 liquidityRate, uint256 stableBorrowRate, uint256 variableBorrowRate);
}

// File: contracts/interfaces/IScaledBalanceToken.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

interface IScaledBalanceToken {
	/**
	 * @dev Returns the scaled balance of the user. The scaled balance is the sum of all the
	 * updated stored balance divided by the reserve's liquidity index at the moment of the update
	 * @param user The user whose balance is calculated
	 * @return The scaled balance of the user
	 **/
	function scaledBalanceOf(address user) external view returns (uint256);

	/**
	 * @dev Returns the scaled balance of the user and the scaled total supply.
	 * @param user The address of the user
	 * @return The scaled balance of the user
	 * @return The scaled balance and the scaled total supply
	 **/
	function getScaledUserBalanceAndSupply(address user) external view returns (uint256, uint256);

	/**
	 * @dev Returns the scaled total supply of the variable debt token. Represents sum(debt/index)
	 * @return The scaled total supply
	 **/
	function scaledTotalSupply() external view returns (uint256);
}

// File: contracts/interfaces/IStableDebtToken.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

import {IInitializableDebtToken} from "./IInitializableDebtToken.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";

/**
 * @title IStableDebtToken
 * @notice Defines the interface for the stable debt token
 * @dev It does not inherit from IERC20 to save in code size
 * @author Aave
 **/

interface IStableDebtToken is IInitializableDebtToken {
	/**
	 * @dev Emitted when new stable debt is minted
	 * @param user The address of the user who triggered the minting
	 * @param onBehalfOf The recipient of stable debt tokens
	 * @param amount The amount minted
	 * @param currentBalance The current balance of the user
	 * @param balanceIncrease The increase in balance since the last action of the user
	 * @param newRate The rate of the debt after the minting
	 * @param avgStableRate The new average stable rate after the minting
	 * @param newTotalSupply The new total supply of the stable debt token after the action
	 **/
	event Mint(
		address indexed user,
		address indexed onBehalfOf,
		uint256 amount,
		uint256 currentBalance,
		uint256 balanceIncrease,
		uint256 newRate,
		uint256 avgStableRate,
		uint256 newTotalSupply
	);

	/**
	 * @dev Emitted when new stable debt is burned
	 * @param user The address of the user
	 * @param amount The amount being burned
	 * @param currentBalance The current balance of the user
	 * @param balanceIncrease The the increase in balance since the last action of the user
	 * @param avgStableRate The new average stable rate after the burning
	 * @param newTotalSupply The new total supply of the stable debt token after the action
	 **/
	event Burn(
		address indexed user,
		uint256 amount,
		uint256 currentBalance,
		uint256 balanceIncrease,
		uint256 avgStableRate,
		uint256 newTotalSupply
	);

	/**
	 * @dev Mints debt token to the `onBehalfOf` address.
	 * - The resulting rate is the weighted average between the rate of the new debt
	 * and the rate of the previous debt
	 * @param user The address receiving the borrowed underlying, being the delegatee in case
	 * of credit delegate, or same as `onBehalfOf` otherwise
	 * @param onBehalfOf The address receiving the debt tokens
	 * @param amount The amount of debt tokens to mint
	 * @param rate The rate of the debt being minted
	 **/
	function mint(address user, address onBehalfOf, uint256 amount, uint256 rate) external returns (bool);

	/**
	 * @dev Burns debt of `user`
	 * - The resulting rate is the weighted average between the rate of the new debt
	 * and the rate of the previous debt
	 * @param user The address of the user getting his debt burned
	 * @param amount The amount of debt tokens getting burned
	 **/
	function burn(address user, uint256 amount) external;

	/**
	 * @dev Returns the average rate of all the stable rate loans.
	 * @return The average stable rate
	 **/
	function getAverageStableRate() external view returns (uint256);

	/**
	 * @dev Returns the stable rate of the user debt
	 * @return The stable rate of the user
	 **/
	function getUserStableRate(address user) external view returns (uint256);

	/**
	 * @dev Returns the timestamp of the last update of the user
	 * @return The timestamp
	 **/
	function getUserLastUpdated(address user) external view returns (uint40);

	/**
	 * @dev Returns the principal, the total supply and the average stable rate
	 **/
	function getSupplyData() external view returns (uint256, uint256, uint256, uint40);

	/**
	 * @dev Returns the timestamp of the last update of the total supply
	 * @return The timestamp
	 **/
	function getTotalSupplyLastUpdated() external view returns (uint40);

	/**
	 * @dev Returns the total supply and the average stable rate
	 **/
	function getTotalSupplyAndAvgRate() external view returns (uint256, uint256);

	/**
	 * @dev Returns the principal debt balance of the user
	 * @return The debt balance of the user since the last burn/mint action
	 **/
	function principalBalanceOf(address user) external view returns (uint256);

	/**
	 * @dev Returns the address of the incentives controller contract
	 **/
	function getIncentivesController() external view returns (IAaveIncentivesController);
}

// File: contracts/interfaces/IVariableDebtToken.sol



// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.8.12;

import {IScaledBalanceToken} from "./IScaledBalanceToken.sol";
import {IInitializableDebtToken} from "./IInitializableDebtToken.sol";
import {IAaveIncentivesController} from "./IAaveIncentivesController.sol";

/**
 * @title IVariableDebtToken
 * @author Aave
 * @notice Defines the basic interface for a variable debt token.
 **/
interface IVariableDebtToken is IScaledBalanceToken, IInitializableDebtToken {
	/**
	 * @dev Emitted after the mint action
	 * @param from The address performing the mint
	 * @param onBehalfOf The address of the user on which behalf minting has been performed
	 * @param value The amount to be minted
	 * @param index The last index of the reserve
	 **/
	event Mint(address indexed from, address indexed onBehalfOf, uint256 value, uint256 index);

	/**
	 * @dev Mints debt token to the `onBehalfOf` address
	 * @param user The address receiving the borrowed underlying, being the delegatee in case
	 * of credit delegate, or same as `onBehalfOf` otherwise
	 * @param onBehalfOf The address receiving the debt tokens
	 * @param amount The amount of debt being minted
	 * @param index The variable debt index of the reserve
	 * @return `true` if the the previous balance of the user is 0
	 **/
	function mint(address user, address onBehalfOf, uint256 amount, uint256 index) external returns (bool);

	/**
	 * @dev Emitted when variable debt is burnt
	 * @param user The user which debt has been burned
	 * @param amount The amount of debt being burned
	 * @param index The index of the user
	 **/
	event Burn(address indexed user, uint256 amount, uint256 index);

	/**
	 * @dev Burns user variable debt
	 * @param user The user which debt is burnt
	 * @param index The variable debt index of the reserve
	 **/
	function burn(address user, uint256 amount, uint256 index) external;

	/**
	 * @dev Returns the address of the incentives controller contract
	 **/
	function getIncentivesController() external view returns (IAaveIncentivesController);
}

// File: contracts/lending/flashloan/interfaces/IFlashLoanReceiver.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import {ILendingPoolAddressesProvider} from "../../../interfaces/ILendingPoolAddressesProvider.sol";
import {ILendingPool} from "../../../interfaces/ILendingPool.sol";

/**
 * @title IFlashLoanReceiver interface
 * @notice Interface for the Aave fee IFlashLoanReceiver.
 * @author Aave
 * @dev implement this interface to develop a flashloan-compatible flashLoanReceiver contract
 **/
interface IFlashLoanReceiver {
	function executeOperation(
		address[] calldata assets,
		uint256[] calldata amounts,
		uint256[] calldata premiums,
		address initiator,
		bytes calldata params
	) external returns (bool);

	function ADDRESSES_PROVIDER() external view returns (ILendingPoolAddressesProvider);

	function LENDING_POOL() external view returns (ILendingPool);
}

// File: contracts/lending/lendingpool/LendingPool.sol



// SPDX-License-Identifier: MIT
pragma solidity 0.8.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import {ILendingPoolAddressesProvider} from "../../interfaces/ILendingPoolAddressesProvider.sol";
import {ILendingPoolCollateralManager} from "../../interfaces/ILendingPoolCollateralManager.sol";
import {IAToken} from "../../interfaces/IAToken.sol";
import {IVariableDebtToken} from "../../interfaces/IVariableDebtToken.sol";
import {IFlashLoanReceiver} from "../flashloan/interfaces/IFlashLoanReceiver.sol";
import {IPriceOracleGetter} from "../../interfaces/IPriceOracleGetter.sol";
import {IStableDebtToken} from "../../interfaces/IStableDebtToken.sol";
import {ILendingPool} from "../../interfaces/ILendingPool.sol";
import {ILeverager} from "../../interfaces/ILeverager.sol";
import {VersionedInitializable} from "../libraries/aave-upgradeability/VersionedInitializable.sol";
import {Helpers} from "../libraries/helpers/Helpers.sol";
import {Errors} from "../libraries/helpers/Errors.sol";
import {WadRayMath} from "../libraries/math/WadRayMath.sol";
import {PercentageMath} from "../libraries/math/PercentageMath.sol";
import {ReserveLogic} from "../libraries/logic/ReserveLogic.sol";
import {GenericLogic} from "../libraries/logic/GenericLogic.sol";
import {ValidationLogic} from "../libraries/logic/ValidationLogic.sol";
import {ReserveConfiguration} from "../libraries/configuration/ReserveConfiguration.sol";
import {UserConfiguration} from "../libraries/configuration/UserConfiguration.sol";
import {DataTypes} from "../libraries/types/DataTypes.sol";
import {LendingPoolStorage} from "./LendingPoolStorage.sol";

/**
 * @title LendingPool contract
 * @dev Main point of interaction with an Aave protocol's market
 * - Users can:
 *   # Deposit
 *   # Withdraw
 *   # Borrow
 *   # Repay
 *   # Swap their loans between variable and stable rate
 *   # Enable/disable their deposits as collateral rebalance stable rate borrow positions
 *   # Liquidate positions
 *   # Execute Flash Loans
 * - To be covered by a proxy contract, owned by the LendingPoolAddressesProvider of the specific market
 * - All admin functions are callable by the LendingPoolConfigurator contract defined also in the
 *   LendingPoolAddressesProvider
 * @author Aave
 **/
contract LendingPool is VersionedInitializable, ILendingPool, LendingPoolStorage {
	using SafeMath for uint256;
	using WadRayMath for uint256;
	using PercentageMath for uint256;
	using SafeERC20 for IERC20;
	using ReserveLogic for DataTypes.ReserveData;
	using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
	using UserConfiguration for DataTypes.UserConfigurationMap;

	uint256 public constant LENDINGPOOL_REVISION = 0x2;

	ILeverager public leverager;

	address public owner;

	modifier whenNotPaused() {
		_whenNotPaused();
		_;
	}

	modifier onlyLendingPoolConfigurator() {
		_onlyLendingPoolConfigurator();
		_;
	}

	function _whenNotPaused() internal view {
		require(!_paused, Errors.LP_IS_PAUSED);
	}

	function _onlyLendingPoolConfigurator() internal view {
		require(
			_addressesProvider.getLendingPoolConfigurator() == msg.sender,
			Errors.LP_CALLER_NOT_LENDING_POOL_CONFIGURATOR
		);
	}

	function getRevision() internal pure override returns (uint256) {
		return LENDINGPOOL_REVISION;
	}

	constructor() {
		_disableInitializers();
	}

	/**
	 * @dev Function is invoked by the proxy contract when the LendingPool contract is added to the
	 * LendingPoolAddressesProvider of the market.
	 * - Caching the address of the LendingPoolAddressesProvider in order to reduce gas consumption
	 *   on subsequent operations
	 * @param provider The address of the LendingPoolAddressesProvider
	 **/
	function initialize(ILendingPoolAddressesProvider provider) public override initializer {
		_addressesProvider = provider;
		_maxStableRateBorrowSizePercent = 2500;
		_flashLoanPremiumTotal = 9;
		_maxNumberOfReserves = 128;
		owner = tx.origin;
	}

	/**
	 * @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
	 * - E.g. User deposits 100 USDC and gets in return 100 aUSDC
	 * @param asset The address of the underlying asset to deposit
	 * @param amount The amount to be deposited
	 * @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
	 *   wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
	 *   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(address asset, uint256 amount, address onBehalfOf, uint16 referralCode) public whenNotPaused {
		DataTypes.ReserveData storage reserve = _reserves[asset];

		ValidationLogic.validateDeposit(reserve, amount);

		address aToken = reserve.aTokenAddress;

		reserve.updateState();
		reserve.updateInterestRates(asset, aToken, amount, 0);

		IERC20(asset).safeTransferFrom(msg.sender, aToken, amount);

		if (IAToken(aToken).balanceOf(onBehalfOf) == 0) {
			_usersConfig[onBehalfOf].setUsingAsCollateral(reserve.id, true);
			emit ReserveUsedAsCollateralEnabled(asset, onBehalfOf);
		}

		IAToken(aToken).mint(onBehalfOf, amount, reserve.liquidityIndex);

		emit Deposit(asset, msg.sender, onBehalfOf, amount, referralCode);
	}

	function depositWithAutoDLP(
		address asset,
		uint256 amount,
		address onBehalfOf,
		uint16 referralCode
	) external whenNotPaused {
		require(tx.origin == onBehalfOf);
		deposit(asset, amount, onBehalfOf, referralCode);
		leverager.zapWETHWithBorrow(leverager.wethToZap(onBehalfOf), onBehalfOf);
	}

	/**
	 * @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned
	 * E.g. User has 100 aUSDC, calls withdraw() and receives 100 USDC, burning the 100 aUSDC
	 * @param asset The address of the underlying asset to withdraw
	 * @param amount The underlying amount to be withdrawn
	 *   - Send the value type(uint256).max in order to withdraw the whole aToken balance
	 * @param to Address that will receive the underlying, 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
	 * @return The final amount withdrawn
	 **/
	function withdraw(address asset, uint256 amount, address to) external whenNotPaused returns (uint256) {
		DataTypes.ReserveData storage reserve = _reserves[asset];

		address aToken = reserve.aTokenAddress;

		uint256 userBalance = IAToken(aToken).balanceOf(msg.sender);

		uint256 amountToWithdraw = amount;

		if (amount == type(uint256).max) {
			amountToWithdraw = userBalance;
		}

		ValidationLogic.validateWithdraw(
			asset,
			amountToWithdraw,
			userBalance,
			_reserves,
			_usersConfig[msg.sender],
			_reservesList,
			_reservesCount,
			_addressesProvider.getPriceOracle()
		);

		reserve.updateState();

		reserve.updateInterestRates(asset, aToken, 0, amountToWithdraw);

		if (amountToWithdraw == userBalance) {
			_usersConfig[msg.sender].setUsingAsCollateral(reserve.id, false);
			emit ReserveUsedAsCollateralDisabled(asset, msg.sender);
		}

		IAToken(aToken).burn(msg.sender, to, amountToWithdraw, reserve.liquidityIndex);

		emit Withdraw(asset, msg.sender, to, amountToWithdraw);

		return amountToWithdraw;
	}

	/**
	 * @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
	 * already deposited enough collateral, or he was given enough allowance by a credit delegator on the
	 * corresponding debt token (StableDebtToken or VariableDebtToken)
	 * - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet
	 *   and 100 stable/variable debt tokens, depending on the `interestRateMode`
	 * @param asset The address of the underlying asset to borrow
	 * @param amount The amount to be borrowed
	 * @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable
	 * @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
	 * @param onBehalfOf Address of the user who will receive the debt. Should be the address of the borrower itself
	 * calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
	 * if he has been given credit delegation allowance
	 **/
	function borrow(
		address asset,
		uint256 amount,
		uint256 interestRateMode,
		uint16 referralCode,
		address onBehalfOf
	) external whenNotPaused {
		DataTypes.ReserveData storage reserve = _reserves[asset];

		_executeBorrow(
			ExecuteBorrowParams(
				asset,
				msg.sender,
				onBehalfOf,
				amount,
				interestRateMode,
				reserve.aTokenAddress,
				referralCode,
				true
			)
		);
	}

	/**
	 * @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned
	 * - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address
	 * @param asset The address of the borrowed underlying asset previously borrowed
	 * @param amount The amount to repay
	 * - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
	 * @param rateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
	 * @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the
	 * user calling the function if he wants to reduce/remove his own debt, or the address of any other
	 * other borrower whose debt should be removed
	 * @return The final amount repaid
	 **/
	function repay(
		address asset,
		uint256 amount,
		uint256 rateMode,
		address onBehalfOf
	) external whenNotPaused returns (uint256) {
		DataTypes.ReserveData storage reserve = _reserves[asset];

		(uint256 stableDebt, uint256 variableDebt) = Helpers.getUserCurrentDebt(onBehalfOf, reserve);

		DataTypes.InterestRateMode interestRateMode = DataTypes.InterestRateMode(rateMode);

		ValidationLogic.validateRepay(reserve, amount, interestRateMode, onBehalfOf, stableDebt, variableDebt);

		uint256 paybackAmount = interestRateMode == DataTypes.InterestRateMode.STABLE ? stableDebt : variableDebt;

		if (amount < paybackAmount) {
			paybackAmount = amount;
		}

		reserve.updateState();

		if (interestRateMode == DataTypes.InterestRateMode.STABLE) {
			IStableDebtToken(reserve.stableDebtTokenAddress).burn(onBehalfOf, paybackAmount);
		} else {
			IVariableDebtToken(reserve.variableDebtTokenAddress).burn(
				onBehalfOf,
				paybackAmount,
				reserve.variableBorrowIndex
			);
		}

		address aToken = reserve.aTokenAddress;
		reserve.updateInterestRates(asset, aToken, paybackAmount, 0);

		if (stableDebt.add(variableDebt).sub(paybackAmount) == 0) {
			_usersConfig[onBehalfOf].setBorrowing(reserve.id, false);
		}

		IERC20(asset).safeTransferFrom(msg.sender, aToken, paybackAmount);

		IAToken(aToken).handleRepayment(msg.sender, paybackAmount);

		emit Repay(asset, onBehalfOf, msg.sender, paybackAmount);

		return paybackAmount;
	}

	/**
	 * @dev Allows a borrower to swap his debt between stable and variable mode, or viceversa
	 * @param asset The address of the underlying asset borrowed
	 * @param rateMode The rate mode that the user wants to swap to
	 **/
	function swapBorrowRateMode(address asset, uint256 rateMode) external whenNotPaused {
		DataTypes.ReserveData storage reserve = _reserves[asset];

		(uint256 stableDebt, uint256 variableDebt) = Helpers.getUserCurrentDebt(msg.sender, reserve);

		DataTypes.InterestRateMode interestRateMode = DataTypes.InterestRateMode(rateMode);

		ValidationLogic.validateSwapRateMode(
			reserve,
			_usersConfig[msg.sender],
			stableDebt,
			variableDebt,
			interestRateMode
		);

		reserve.updateState();

		if (interestRateMode == DataTypes.InterestRateMode.STABLE) {
			IStableDebtToken(reserve.stableDebtTokenAddress).burn(msg.sender, stableDebt);
			IVariableDebtToken(reserve.variableDebtTokenAddress).mint(
				msg.sender,
				msg.sender,
				stableDebt,
				reserve.variableBorrowIndex
			);
		} else {
			IVariableDebtToken(reserve.variableDebtTokenAddress).burn(
				msg.sender,
				variableDebt,
				reserve.variableBorrowIndex
			);
			IStableDebtToken(reserve.stableDebtTokenAddress).mint(
				msg.sender,
				msg.sender,
				variableDebt,
				reserve.currentStableBorrowRate
			);
		}

		reserve.updateInterestRates(asset, reserve.aTokenAddress, 0, 0);

		emit Swap(asset, msg.sender, rateMode);
	}

	/**
	 * @dev Rebalances the stable interest rate of a user to the current stable rate defined on the reserve.
	 * - Users can be rebalanced if the following conditions are satisfied:
	 *     1. Usage ratio is above 95%
	 *     2. the current deposit APY is below REBALANCE_UP_THRESHOLD * maxVariableBorrowRate, which means that too much has been
	 *        borrowed at a stable rate and depositors are not earning enough
	 * @param asset The address of the underlying asset borrowed
	 * @param user The address of the user to be rebalanced
	 **/
	function rebalanceStableBorrowRate(address asset, address user) external whenNotPaused {
		DataTypes.ReserveData storage reserve = _reserves[asset];

		IERC20 stableDebtToken = IERC20(reserve.stableDebtTokenAddress);
		IERC20 variableDebtToken = IERC20(reserve.variableDebtTokenAddress);
		address aTokenAddress = reserve.aTokenAddress;

		uint256 stableDebt = IERC20(stableDebtToken).balanceOf(user);

		ValidationLogic.validateRebalanceStableBorrowRate(
			reserve,
			asset,
			stableDebtToken,
			variableDebtToken,
			aTokenAddress
		);

		reserve.updateState();

		IStableDebtToken(address(stableDebtToken)).burn(user, stableDebt);
		IStableDebtToken(address(stableDebtToken)).mint(user, user, stableDebt, reserve.currentStableBorrowRate);

		reserve.updateInterestRates(asset, aTokenAddress, 0, 0);

		emit RebalanceStableBorrowRate(asset, user);
	}

	/**
	 * @dev Allows depositors to enable/disable a specific deposited asset as collateral
	 * @param asset The address of the underlying asset deposited
	 * @param useAsCollateral `true` if the user wants to use the deposit as collateral, `false` otherwise
	 **/
	function setUserUseReserveAsCollateral(address asset, bool useAsCollateral) external whenNotPaused {
		DataTypes.ReserveData storage reserve = _reserves[asset];

		ValidationLogic.validateSetUseReserveAsCollateral(
			reserve,
			asset,
			useAsCollateral,
			_reserves,
			_usersConfig[msg.sender],
			_reservesList,
			_reservesCount,
			_addressesProvider.getPriceOracle()
		);

		_usersConfig[msg.sender].setUsingAsCollateral(reserve.id, useAsCollateral);

		if (useAsCollateral) {
			emit ReserveUsedAsCollateralEnabled(asset, msg.sender);
		} else {
			emit ReserveUsedAsCollateralDisabled(asset, msg.sender);
		}
	}

	/**
	 * @dev Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1
	 * - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives
	 *   a proportionally amount of the `collateralAsset` plus a bonus to cover market risk
	 * @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the liquidation
	 * @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation
	 * @param user The address of the borrower getting liquidated
	 * @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover
	 * @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants
	 * to receive the underlying collateral asset directly
	 **/
	function liquidationCall(
		address collateralAsset,
		address debtAsset,
		address user,
		uint256 debtToCover,
		bool receiveAToken
	) external whenNotPaused {
		address collateralManager = _addressesProvider.getLendingPoolCollateralManager();
		address liquidationFeeTo = _addressesProvider.getLiquidationFeeTo();
		if (liquidationFeeTo == address(0)) {
			liquidationFeeTo = msg.sender;
		}

		//solium-disable-next-line
		(bool success, bytes memory result) = collateralManager.delegatecall(
			abi.encodeCall(
				ILendingPoolCollateralManager.liquidationCall,
				(collateralAsset, debtAsset, user, debtToCover, receiveAToken, liquidationFeeTo)
			)
		);

		require(success, Errors.LP_LIQUIDATION_CALL_FAILED);

		(uint256 returnCode, string memory returnMessage) = abi.decode(result, (uint256, string));

		require(returnCode == 0, string(abi.encodePacked(returnMessage)));
	}

	struct FlashLoanLocalVars {
		IFlashLoanReceiver receiver;
		address oracle;
		uint256 i;
		address currentAsset;
		address currentATokenAddress;
		uint256 currentAmount;
		uint256 currentPremium;
		uint256 currentAmountPlusPremium;
		address debtToken;
	}

	/**
	 * @dev Allows smartcontracts to access the liquidity of the pool within one transaction,
	 * as long as the amount taken plus a fee is returned.
	 * IMPORTANT There are security concerns for developers of flashloan receiver contracts that must be kept into consideration.
	 * For further details please visit https://developers.aave.com
	 * @param receiverAddress The address of the contract receiving the funds, implementing the IFlashLoanReceiver interface
	 * @param assets The addresses of the assets being flash-borrowed
	 * @param amounts The amounts amounts being flash-borrowed
	 * @param modes Types of the debt to open if the flash loan is not returned:
	 *   0 -> Don't open any debt, just revert if funds can't be transferred from the receiver
	 *   1 -> Open debt at stable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
	 *   2 -> Open debt at variable rate for the value of the amount flash-borrowed to the `onBehalfOf` address
	 * @param onBehalfOf The address  that will receive the debt in the case of using on `modes` 1 or 2
	 * @param params Variadic packed params to pass to the receiver as extra information
	 * @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 flashLoan(
		address receiverAddress,
		address[] calldata assets,
		uint256[] calldata amounts,
		uint256[] calldata modes,
		address onBehalfOf,
		bytes calldata params,
		uint16 referralCode
	) external whenNotPaused {
		FlashLoanLocalVars memory vars;

		ValidationLogic.validateFlashloan(assets, amounts);

		address[] memory aTokenAddresses = new address[](assets.length);
		uint256[] memory premiums = new uint256[](assets.length);

		vars.receiver = IFlashLoanReceiver(receiverAddress);

		for (vars.i = 0; vars.i < assets.length; ) {
			aTokenAddresses[vars.i] = _reserves[assets[vars.i]].aTokenAddress;

			premiums[vars.i] = amounts[vars.i].mul(_flashLoanPremiumTotal).div(10000);

			IAToken(aTokenAddresses[vars.i]).transferUnderlyingTo(receiverAddress, amounts[vars.i]);
			unchecked {
				vars.i++;
			}
		}

		require(
			vars.receiver.executeOperation(assets, amounts, premiums, msg.sender, params),
			Errors.LP_INVALID_FLASH_LOAN_EXECUTOR_RETURN
		);

		for (vars.i = 0; vars.i < assets.length; ) {
			vars.currentAsset = assets[vars.i];
			vars.currentAmount = amounts[vars.i];
			vars.currentPremium = premiums[vars.i];
			vars.currentATokenAddress = aTokenAddresses[vars.i];
			vars.currentAmountPlusPremium = vars.currentAmount.add(vars.currentPremium);

			if (DataTypes.InterestRateMode(modes[vars.i]) == DataTypes.InterestRateMode.NONE) {
				_reserves[vars.currentAsset].updateState();
				_reserves[vars.currentAsset].cumulateToLiquidityIndex(
					IERC20(vars.currentATokenAddress).totalSupply(),
					vars.currentPremium
				);
				_reserves[vars.currentAsset].updateInterestRates(
					vars.currentAsset,
					vars.currentATokenAddress,
					vars.currentAmountPlusPremium,
					0
				);

				IERC20(vars.currentAsset).safeTransferFrom(
					receiverAddress,
					vars.currentATokenAddress,
					vars.currentAmountPlusPremium
				);
			} else {
				// If the user chose to not return the funds, the system checks if there is enough collateral and
				// eventually opens a debt position
				_executeBorrow(
					ExecuteBorrowParams(
						vars.currentAsset,
						msg.sender,
						onBehalfOf,
						vars.currentAmount,
						modes[vars.i],
						vars.currentATokenAddress,
						referralCode,
						false
					)
				);
			}
			emit FlashLoan(
				receiverAddress,
				msg.sender,
				vars.currentAsset,
				vars.currentAmount,
				vars.currentPremium,
				referralCode
			);
			unchecked {
				vars.i++;
			}
		}
	}

	/**
	 * @dev Returns the state and configuration of the reserve
	 * @param asset The address of the underlying asset of the reserve
	 * @return The state of the reserve
	 **/
	function getReserveData(address asset) external view returns (DataTypes.ReserveData memory) {
		return _reserves[asset];
	}

	/**
	 * @dev Returns the user account data across all the reserves
	 * @param user The address of the user
	 * @return totalCollateralETH the total collateral in ETH of the user
	 * @return totalDebtETH the total debt in ETH of the user
	 * @return availableBorrowsETH the borrowing power left of the user
	 * @return currentLiquidationThreshold the liquidation threshold of the user
	 * @return ltv the loan to value of the user
	 * @return healthFactor the current health factor of the user
	 **/
	function getUserAccountData(
		address user
	)
		external
		view
		returns (
			uint256 totalCollateralETH,
			uint256 totalDebtETH,
			uint256 availableBorrowsETH,
			uint256 currentLiquidationThreshold,
			uint256 ltv,
			uint256 healthFactor
		)
	{
		(totalCollateralETH, totalDebtETH, ltv, currentLiquidationThreshold, healthFactor) = GenericLogic
			.calculateUserAccountData(
				user,
				_reserves,
				_usersConfig[user],
				_reservesList,
				_reservesCount,
				_addressesProvider.getPriceOracle()
			);

		availableBorrowsETH = GenericLogic.calculateAvailableBorrowsETH(totalCollateralETH, totalDebtETH, ltv);
	}

	/**
	 * @dev Returns the configuration of the reserve
	 * @param asset The address of the underlying asset of the reserve
	 * @return The configuration of the reserve
	 **/
	function getConfiguration(address asset) external view returns (DataTypes.ReserveConfigurationMap memory) {
		return _reserves[asset].configuration;
	}

	/**
	 * @dev Returns the configuration of the user across all the reserves
	 * @param user The user address
	 * @return The configuration of the user
	 **/
	function getUserConfiguration(address user) external view returns (DataTypes.UserConfigurationMap memory) {
		return _usersConfig[user];
	}

	/**
	 * @dev Returns the normalized income per unit of asset
	 * @param asset The address of the underlying asset of the reserve
	 * @return The reserve's normalized income
	 */
	function getReserveNormalizedIncome(address asset) external view virtual returns (uint256) {
		return _reserves[asset].getNormalizedIncome();
	}

	/**
	 * @dev Returns the normalized variable debt per unit of asset
	 * @param asset The address of the underlying asset of the reserve
	 * @return The reserve normalized variable debt
	 */
	function getReserveNormalizedVariableDebt(address asset) external view returns (uint256) {
		return _reserves[asset].getNormalizedDebt();
	}

	/**
	 * @dev Returns if the LendingPool is paused
	 */
	function paused() external view returns (bool) {
		return _paused;
	}

	/**
	 * @dev Returns the list of the initialized reserves
	 **/
	function getReservesList() external view returns (address[] memory) {
		address[] memory _activeReserves = new address[](_reservesCount);

		for (uint256 i = 0; i < _reservesCount; ) {
			_activeReserves[i] = _reservesList[i];
			unchecked {
				i++;
			}
		}
		return _activeReserves;
	}

	/**
	 * @dev Returns the cached LendingPoolAddressesProvider connected to this contract
	 **/
	function getAddressesProvider() external view returns (ILendingPoolAddressesProvider) {
		return _addressesProvider;
	}

	/**
	 * @dev Returns the percentage of available liquidity that can be borrowed at once at stable rate
	 */
	function MAX_STABLE_RATE_BORROW_SIZE_PERCENT() public view returns (uint256) {
		return _maxStableRateBorrowSizePercent;
	}

	/**
	 * @dev Returns the fee on flash loans
	 */
	function FLASHLOAN_PREMIUM_TOTAL() public view returns (uint256) {
		return _flashLoanPremiumTotal;
	}

	/**
	 * @dev Returns the maximum number of reserves supported to be listed in this LendingPool
	 */
	function MAX_NUMBER_RESERVES() public view returns (uint256) {
		return _maxNumberOfReserves;
	}

	/**
	 * @dev Validates and finalizes an aToken transfer
	 * - Only callable by the overlying aToken of the `asset`
	 * @param asset The address of the underlying asset of the aToken
	 * @param from The user from which the aTokens are transferred
	 * @param to The user receiving the aTokens
	 * @param amount The amount being transferred/withdrawn
	 * @param balanceFromBefore The aToken balance of the `from` user before the transfer
	 * @param balanceToBefore The aToken balance of the `to` user before the transfer
	 */
	function finalizeTransfer(
		address asset,
		address from,
		address to,
		uint256 amount,
		uint256 balanceFromBefore,
		uint256 balanceToBefore
	) external whenNotPaused {
		require(msg.sender == _reserves[asset].aTokenAddress, Errors.LP_CALLER_MUST_BE_AN_ATOKEN);

		ValidationLogic.validateTransfer(
			from,
			_reserves,
			_usersConfig[from],
			_reservesList,
			_reservesCount,
			_addressesProvider.getPriceOracle()
		);

		uint256 reserveId = _reserves[asset].id;

		if (from != to) {
			if (balanceFromBefore.sub(amount) == 0) {
				DataTypes.UserConfigurationMap storage fromConfig = _usersConfig[from];
				fromConfig.setUsingAsCollateral(reserveId, false);
				emit ReserveUsedAsCollateralDisabled(asset, from);
			}

			if (balanceToBefore == 0 && amount != 0) {
				DataTypes.UserConfigurationMap storage toConfig = _usersConfig[to];
				toConfig.setUsingAsCollateral(reserveId, true);
				emit ReserveUsedAsCollateralEnabled(asset, to);
			}
		}
	}

	/**
	 * @dev Initializes a reserve, activating it, assigning an aToken and debt tokens and an
	 * interest rate strategy
	 * - Only callable by the LendingPoolConfigurator contract
	 * @param asset The address of the underlying asset of the reserve
	 * @param aTokenAddress The address of the aToken that will be assigned to the reserve
	 * @param stableDebtAddress The address of the StableDebtToken that will be assigned to the reserve
	 * @param aTokenAddress The address of the VariableDebtToken that will be assigned to the reserve
	 * @param interestRateStrategyAddress The address of the interest rate strategy contract
	 **/
	function initReserve(
		address asset,
		address aTokenAddress,
		address stableDebtAddress,
		address variableDebtAddress,
		address interestRateStrategyAddress
	) external onlyLendingPoolConfigurator {
		require(Address.isContract(asset), Errors.LP_NOT_CONTRACT);
		_reserves[asset].init(aTokenAddress, stableDebtAddress, variableDebtAddress, interestRateStrategyAddress);
		_addReserveToList(asset);
	}

	/**
	 * @dev Updates the address of the interest rate strategy contract
	 * - Only callable by the LendingPoolConfigurator contract
	 * @param asset The address of the underlying asset of the reserve
	 * @param rateStrategyAddress The address of the interest rate strategy contract
	 **/
	function setReserveInterestRateStrategyAddress(
		address asset,
		address rateStrategyAddress
	) external onlyLendingPoolConfigurator {
		_reserves[asset].interestRateStrategyAddress = rateStrategyAddress;
	}

	/**
	 * @dev Sets the configuration bitmap of the reserve as a whole
	 * - Only callable by the LendingPoolConfigurator contract
	 * @param asset The address of the underlying asset of the reserve
	 * @param configuration The new configuration bitmap
	 **/
	function setConfiguration(address asset, uint256 configuration) external onlyLendingPoolConfigurator {
		_reserves[asset].configuration.data = configuration;
	}

	/**
	 * @dev Set the _pause state of a reserve
	 * - Only callable by the LendingPoolConfigurator contract
	 * @param val `true` to pause the reserve, `false` to un-pause it
	 */
	function setPause(bool val) external onlyLendingPoolConfigurator {
		_paused = val;
		if (_paused) {
			emit Paused();
		} else {
			emit Unpaused();
		}
	}

	struct ExecuteBorrowParams {
		address asset;
		address user;
		address onBehalfOf;
		uint256 amount;
		uint256 interestRateMode;
		address aTokenAddress;
		uint16 referralCode;
		bool releaseUnderlying;
	}

	function _executeBorrow(ExecuteBorrowParams memory vars) internal {
		DataTypes.ReserveData storage reserve = _reserves[vars.asset];
		DataTypes.UserConfigurationMap storage userConfig = _usersConfig[vars.onBehalfOf];

		address oracle = _addressesProvider.getPriceOracle();

		uint256 amountInETH = IPriceOracleGetter(oracle).getAssetPrice(vars.asset).mul(vars.amount).div(
			10 ** reserve.configuration.getDecimals()
		);

		ValidationLogic.validateBorrow(
			vars.asset,
			reserve,
			vars.onBehalfOf,
			vars.amount,
			amountInETH,
			vars.interestRateMode,
			_maxStableRateBorrowSizePercent,
			_reserves,
			userConfig,
			_reservesList,
			_reservesCount,
			oracle
		);

		reserve.updateState();

		uint256 currentStableRate = 0;

		bool isFirstBorrowing = false;
		if (DataTypes.InterestRateMode(vars.interestRateMode) == DataTypes.InterestRateMode.STABLE) {
			currentStableRate = reserve.currentStableBorrowRate;

			isFirstBorrowing = IStableDebtToken(reserve.stableDebtTokenAddress).mint(
				vars.user,
				vars.onBehalfOf,
				vars.amount,
				currentStableRate
			);
		} else {
			isFirstBorrowing = IVariableDebtToken(reserve.variableDebtTokenAddress).mint(
				vars.user,
				vars.onBehalfOf,
				vars.amount,
				reserve.variableBorrowIndex
			);
		}

		if (isFirstBorrowing) {
			userConfig.setBorrowing(reserve.id, true);
		}

		reserve.updateInterestRates(vars.asset, vars.aTokenAddress, 0, vars.releaseUnderlying ? vars.amount : 0);

		if (vars.releaseUnderlying) {
			IAToken(vars.aTokenAddress).transferUnderlyingTo(vars.user, vars.amount);
		}

		emit Borrow(
			vars.asset,
			vars.user,
			vars.onBehalfOf,
			vars.amount,
			vars.interestRateMode,
			DataTypes.InterestRateMode(vars.interestRateMode) == DataTypes.InterestRateMode.STABLE
				? currentStableRate
				: reserve.currentVariableBorrowRate,
			vars.referralCode
		);
	}

	function _addReserveToList(address asset) internal {
		uint256 reservesCount = _reservesCount;

		require(reservesCount < _maxNumberOfReserves, Errors.LP_NO_MORE_RESERVES_ALLOWED);

		bool reserveAlreadyAdded = _reserves[asset].id != 0 || _reservesList[0] == asset;

		if (!reserveAlreadyAdded) {
			_reserves[asset].id = uint8(reservesCount);
			_reservesList[reservesCount] = asset;

			_reservesCount = reservesCount + 1;
		}
	}

	function setLeverager(ILeverager _leverager) external {
		require(msg.sender == owner, "!owner");
		require(address(leverager) == address(0), "Leverager Already Set");
		leverager = _leverager;
	}

	function setNewOwner(address _newOwner) external {
		require(msg.sender == owner, "!owner");
		owner = _newOwner;
	}
}

// File: contracts/lending/lendingpool/LendingPoolStorage.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import {UserConfiguration} from "../libraries/configuration/UserConfiguration.sol";
import {ReserveConfiguration} from "../libraries/configuration/ReserveConfiguration.sol";
import {ReserveLogic} from "../libraries/logic/ReserveLogic.sol";
import {ILendingPoolAddressesProvider} from "../../interfaces/ILendingPoolAddressesProvider.sol";
import {DataTypes} from "../libraries/types/DataTypes.sol";

contract LendingPoolStorage {
	using ReserveLogic for DataTypes.ReserveData;
	using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
	using UserConfiguration for DataTypes.UserConfigurationMap;

	ILendingPoolAddressesProvider internal _addressesProvider;

	mapping(address => DataTypes.ReserveData) internal _reserves;
	mapping(address => DataTypes.UserConfigurationMap) internal _usersConfig;

	// the list of the available reserves, structured as a mapping for gas savings reasons
	mapping(uint256 => address) internal _reservesList;

	uint256 internal _reservesCount;

	bool internal _paused;

	uint256 internal _maxStableRateBorrowSizePercent;

	uint256 internal _flashLoanPremiumTotal;

	uint256 internal _maxNumberOfReserves;
}

// File: contracts/lending/libraries/aave-upgradeability/VersionedInitializable.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

/**
 * @title VersionedInitializable
 *
 * @dev Helper contract to implement initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 *
 * @author Aave, inspired by the OpenZeppelin Initializable contract
 */
abstract contract VersionedInitializable {
	/**
	 * @dev Indicates that the contract has been initialized.
	 */
	uint256 private lastInitializedRevision = 0;

	/**
	 * @dev Indicates that the contract is in the process of being initialized.
	 */
	bool private initializing;

	/**
	 * @dev Indicates that the contract has been initialized.
	 */
	bool private initialized;

	/**
	 * @dev Modifier to use in the initializer function of a contract.
	 */
	modifier initializer() {
		uint256 revision = getRevision();
		bool isTopLevelCall = !initializing;

		require(
			isTopLevelCall && (revision > lastInitializedRevision || !initialized),
			"Contract instance has already been initialized"
		);

		if (isTopLevelCall) {
			initializing = true;
			initialized = true;
			lastInitializedRevision = revision;
		}

		_;

		if (isTopLevelCall) {
			initializing = false;
		}
	}

	/**
	 * @dev returns the revision number of the contract
	 * Needs to be defined in the inherited class as a constant.
	 **/
	function getRevision() internal pure virtual returns (uint256);

	function _disableInitializers() internal virtual {
		require(!initializing, "Initializable: contract is initializing");
		if (!initialized) {
			initialized = true;
		}
	}

	// Reserved storage space to allow for layout changes in the future.
	uint256[50] private ______gap;
}

// File: contracts/lending/libraries/configuration/ReserveConfiguration.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import {Errors} from "../helpers/Errors.sol";
import {DataTypes} from "../types/DataTypes.sol";

/**
 * @title ReserveConfiguration library
 * @author Aave
 * @notice Implements the bitmap logic to handle the reserve configuration
 */
library ReserveConfiguration {
	uint256 constant LTV_MASK =                   0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000; // prettier-ignore
	uint256 constant LIQUIDATION_THRESHOLD_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFF; // prettier-ignore
	uint256 constant LIQUIDATION_BONUS_MASK =     0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFFFFFF; // prettier-ignore
	uint256 constant DECIMALS_MASK =              0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00FFFFFFFFFFFF; // prettier-ignore
	uint256 constant ACTIVE_MASK =                0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFF; // prettier-ignore
	uint256 constant FROZEN_MASK =                0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDFFFFFFFFFFFFFF; // prettier-ignore
	uint256 constant BORROWING_MASK =             0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBFFFFFFFFFFFFFF; // prettier-ignore
	uint256 constant STABLE_BORROWING_MASK =      0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFFFFFFFFF; // prettier-ignore
	uint256 constant RESERVE_FACTOR_MASK =        0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFFFFFFFFFFFFFF; // prettier-ignore

	/// @dev For the LTV, the start bit is 0 (up to 15), hence no bitshifting is needed
	uint256 constant LIQUIDATION_THRESHOLD_START_BIT_POSITION = 16;
	uint256 constant LIQUIDATION_BONUS_START_BIT_POSITION = 32;
	uint256 constant RESERVE_DECIMALS_START_BIT_POSITION = 48;
	uint256 constant IS_ACTIVE_START_BIT_POSITION = 56;
	uint256 constant IS_FROZEN_START_BIT_POSITION = 57;
	uint256 constant BORROWING_ENABLED_START_BIT_POSITION = 58;
	uint256 constant STABLE_BORROWING_ENABLED_START_BIT_POSITION = 59;
	uint256 constant RESERVE_FACTOR_START_BIT_POSITION = 64;

	uint256 constant MAX_VALID_LTV = 65535;
	uint256 constant MAX_VALID_LIQUIDATION_THRESHOLD = 65535;
	uint256 constant MAX_VALID_LIQUIDATION_BONUS = 65535;
	uint256 constant MAX_VALID_DECIMALS = 255;
	uint256 constant MAX_VALID_RESERVE_FACTOR = 65535;

	/**
	 * @dev Sets the Loan to Value of the reserve
	 * @param self The reserve configuration
	 * @param ltv the new ltv
	 **/
	function setLtv(DataTypes.ReserveConfigurationMap memory self, uint256 ltv) internal pure {
		require(ltv <= MAX_VALID_LTV, Errors.RC_INVALID_LTV);

		self.data = (self.data & LTV_MASK) | ltv;
	}

	/**
	 * @dev Gets the Loan to Value of the reserve
	 * @param self The reserve configuration
	 * @return The loan to value
	 **/
	function getLtv(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
		return self.data & ~LTV_MASK;
	}

	/**
	 * @dev Sets the liquidation threshold of the reserve
	 * @param self The reserve configuration
	 * @param threshold The new liquidation threshold
	 **/
	function setLiquidationThreshold(DataTypes.ReserveConfigurationMap memory self, uint256 threshold) internal pure {
		require(threshold <= MAX_VALID_LIQUIDATION_THRESHOLD, Errors.RC_INVALID_LIQ_THRESHOLD);

		self.data = (self.data & LIQUIDATION_THRESHOLD_MASK) | (threshold << LIQUIDATION_THRESHOLD_START_BIT_POSITION);
	}

	/**
	 * @dev Gets the liquidation threshold of the reserve
	 * @param self The reserve configuration
	 * @return The liquidation threshold
	 **/
	function getLiquidationThreshold(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
		return (self.data & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION;
	}

	/**
	 * @dev Sets the liquidation bonus of the reserve
	 * @param self The reserve configuration
	 * @param bonus The new liquidation bonus
	 **/
	function setLiquidationBonus(DataTypes.ReserveConfigurationMap memory self, uint256 bonus) internal pure {
		require(bonus <= MAX_VALID_LIQUIDATION_BONUS, Errors.RC_INVALID_LIQ_BONUS);

		self.data = (self.data & LIQUIDATION_BONUS_MASK) | (bonus << LIQUIDATION_BONUS_START_BIT_POSITION);
	}

	/**
	 * @dev Gets the liquidation bonus of the reserve
	 * @param self The reserve configuration
	 * @return The liquidation bonus
	 **/
	function getLiquidationBonus(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
		return (self.data & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION;
	}

	/**
	 * @dev Sets the decimals of the underlying asset of the reserve
	 * @param self The reserve configuration
	 * @param decimals The decimals
	 **/
	function setDecimals(DataTypes.ReserveConfigurationMap memory self, uint256 decimals) internal pure {
		require(decimals <= MAX_VALID_DECIMALS, Errors.RC_INVALID_DECIMALS);

		self.data = (self.data & DECIMALS_MASK) | (decimals << RESERVE_DECIMALS_START_BIT_POSITION);
	}

	/**
	 * @dev Gets the decimals of the underlying asset of the reserve
	 * @param self The reserve configuration
	 * @return The decimals of the asset
	 **/
	function getDecimals(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
		return (self.data & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION;
	}

	/**
	 * @dev Sets the active state of the reserve
	 * @param self The reserve configuration
	 * @param active The active state
	 **/
	function setActive(DataTypes.ReserveConfigurationMap memory self, bool active) internal pure {
		self.data = (self.data & ACTIVE_MASK) | (uint256(active ? 1 : 0) << IS_ACTIVE_START_BIT_POSITION);
	}

	/**
	 * @dev Gets the active state of the reserve
	 * @param self The reserve configuration
	 * @return The active state
	 **/
	function getActive(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool) {
		return (self.data & ~ACTIVE_MASK) != 0;
	}

	/**
	 * @dev Sets the frozen state of the reserve
	 * @param self The reserve configuration
	 * @param frozen The frozen state
	 **/
	function setFrozen(DataTypes.ReserveConfigurationMap memory self, bool frozen) internal pure {
		self.data = (self.data & FROZEN_MASK) | (uint256(frozen ? 1 : 0) << IS_FROZEN_START_BIT_POSITION);
	}

	/**
	 * @dev Gets the frozen state of the reserve
	 * @param self The reserve configuration
	 * @return The frozen state
	 **/
	function getFrozen(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool) {
		return (self.data & ~FROZEN_MASK) != 0;
	}

	/**
	 * @dev Enables or disables borrowing on the reserve
	 * @param self The reserve configuration
	 * @param enabled True if the borrowing needs to be enabled, false otherwise
	 **/
	function setBorrowingEnabled(DataTypes.ReserveConfigurationMap memory self, bool enabled) internal pure {
		self.data = (self.data & BORROWING_MASK) | (uint256(enabled ? 1 : 0) << BORROWING_ENABLED_START_BIT_POSITION);
	}

	/**
	 * @dev Gets the borrowing state of the reserve
	 * @param self The reserve configuration
	 * @return The borrowing state
	 **/
	function getBorrowingEnabled(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool) {
		return (self.data & ~BORROWING_MASK) != 0;
	}

	/**
	 * @dev Enables or disables stable rate borrowing on the reserve
	 * @param self The reserve configuration
	 * @param enabled True if the stable rate borrowing needs to be enabled, false otherwise
	 **/
	function setStableRateBorrowingEnabled(DataTypes.ReserveConfigurationMap memory self, bool enabled) internal pure {
		self.data =
			(self.data & STABLE_BORROWING_MASK) |
			(uint256(enabled ? 1 : 0) << STABLE_BORROWING_ENABLED_START_BIT_POSITION);
	}

	/**
	 * @dev Gets the stable rate borrowing state of the reserve
	 * @param self The reserve configuration
	 * @return The stable rate borrowing state
	 **/
	function getStableRateBorrowingEnabled(
		DataTypes.ReserveConfigurationMap storage self
	) internal view returns (bool) {
		return (self.data & ~STABLE_BORROWING_MASK) != 0;
	}

	/**
	 * @dev Sets the reserve factor of the reserve
	 * @param self The reserve configuration
	 * @param reserveFactor The reserve factor
	 **/
	function setReserveFactor(DataTypes.ReserveConfigurationMap memory self, uint256 reserveFactor) internal pure {
		require(reserveFactor <= MAX_VALID_RESERVE_FACTOR, Errors.RC_INVALID_RESERVE_FACTOR);

		self.data = (self.data & RESERVE_FACTOR_MASK) | (reserveFactor << RESERVE_FACTOR_START_BIT_POSITION);
	}

	/**
	 * @dev Gets the reserve factor of the reserve
	 * @param self The reserve configuration
	 * @return The reserve factor
	 **/
	function getReserveFactor(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
		return (self.data & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION;
	}

	/**
	 * @dev Gets the configuration flags of the reserve
	 * @param self The reserve configuration
	 * @return The state flags representing active, frozen, borrowing enabled, stableRateBorrowing enabled
	 **/
	function getFlags(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool, bool, bool, bool) {
		uint256 dataLocal = self.data;

		return (
			(dataLocal & ~ACTIVE_MASK) != 0,
			(dataLocal & ~FROZEN_MASK) != 0,
			(dataLocal & ~BORROWING_MASK) != 0,
			(dataLocal & ~STABLE_BORROWING_MASK) != 0
		);
	}

	/**
	 * @dev Gets the configuration paramters of the reserve
	 * @param self The reserve configuration
	 * @return The state params representing ltv, liquidation threshold, liquidation bonus, the reserve decimals
	 **/
	function getParams(
		DataTypes.ReserveConfigurationMap storage self
	) internal view returns (uint256, uint256, uint256, uint256, uint256) {
		uint256 dataLocal = self.data;

		return (
			dataLocal & ~LTV_MASK,
			(dataLocal & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION,
			(dataLocal & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION,
			(dataLocal & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION,
			(dataLocal & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION
		);
	}

	/**
	 * @dev Gets the configuration paramters of the reserve from a memory object
	 * @param self The reserve configuration
	 * @return The state params representing ltv, liquidation threshold, liquidation bonus, the reserve decimals
	 **/
	function getParamsMemory(
		DataTypes.ReserveConfigurationMap memory self
	) internal pure returns (uint256, uint256, uint256, uint256, uint256) {
		return (
			self.data & ~LTV_MASK,
			(self.data & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION,
			(self.data & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION,
			(self.data & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION,
			(self.data & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION
		);
	}

	/**
	 * @dev Gets the configuration flags of the reserve from a memory object
	 * @param self The reserve configuration
	 * @return The state flags representing active, frozen, borrowing enabled, stableRateBorrowing enabled
	 **/
	function getFlagsMemory(
		DataTypes.ReserveConfigurationMap memory self
	) internal pure returns (bool, bool, bool, bool) {
		return (
			(self.data & ~ACTIVE_MASK) != 0,
			(self.data & ~FROZEN_MASK) != 0,
			(self.data & ~BORROWING_MASK) != 0,
			(self.data & ~STABLE_BORROWING_MASK) != 0
		);
	}
}

// File: contracts/lending/libraries/configuration/UserConfiguration.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import {Errors} from "../helpers/Errors.sol";
import {DataTypes} from "../types/DataTypes.sol";

/**
 * @title UserConfiguration library
 * @author Aave
 * @notice Implements the bitmap logic to handle the user configuration
 */
library UserConfiguration {
	uint256 internal constant BORROWING_MASK = 0x5555555555555555555555555555555555555555555555555555555555555555;

	/**
	 * @dev Sets if the user is borrowing the reserve identified by reserveIndex
	 * @param self The configuration object
	 * @param reserveIndex The index of the reserve in the bitmap
	 * @param borrowing True if the user is borrowing the reserve, false otherwise
	 **/
	function setBorrowing(DataTypes.UserConfigurationMap storage self, uint256 reserveIndex, bool borrowing) internal {
		require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
		self.data = (self.data & ~(1 << (reserveIndex * 2))) | (uint256(borrowing ? 1 : 0) << (reserveIndex * 2));
	}

	/**
	 * @dev Sets if the user is using as collateral the reserve identified by reserveIndex
	 * @param self The configuration object
	 * @param reserveIndex The index of the reserve in the bitmap
	 * @param usingAsCollateral True if the user is usin the reserve as collateral, false otherwise
	 **/
	function setUsingAsCollateral(
		DataTypes.UserConfigurationMap storage self,
		uint256 reserveIndex,
		bool usingAsCollateral
	) internal {
		require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
		self.data =
			(self.data & ~(1 << (reserveIndex * 2 + 1))) |
			(uint256(usingAsCollateral ? 1 : 0) << (reserveIndex * 2 + 1));
	}

	/**
	 * @dev Used to validate if a user has been using the reserve for borrowing or as collateral
	 * @param self The configuration object
	 * @param reserveIndex The index of the reserve in the bitmap
	 * @return True if the user has been using a reserve for borrowing or as collateral, false otherwise
	 **/
	function isUsingAsCollateralOrBorrowing(
		DataTypes.UserConfigurationMap memory self,
		uint256 reserveIndex
	) internal pure returns (bool) {
		require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
		return (self.data >> (reserveIndex * 2)) & 3 != 0;
	}

	/**
	 * @dev Used to validate if a user has been using the reserve for borrowing
	 * @param self The configuration object
	 * @param reserveIndex The index of the reserve in the bitmap
	 * @return True if the user has been using a reserve for borrowing, false otherwise
	 **/
	function isBorrowing(
		DataTypes.UserConfigurationMap memory self,
		uint256 reserveIndex
	) internal pure returns (bool) {
		require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
		return (self.data >> (reserveIndex * 2)) & 1 != 0;
	}

	/**
	 * @dev Used to validate if a user has been using the reserve as collateral
	 * @param self The configuration object
	 * @param reserveIndex The index of the reserve in the bitmap
	 * @return True if the user has been using a reserve as collateral, false otherwise
	 **/
	function isUsingAsCollateral(
		DataTypes.UserConfigurationMap memory self,
		uint256 reserveIndex
	) internal pure returns (bool) {
		require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
		return (self.data >> (reserveIndex * 2 + 1)) & 1 != 0;
	}

	/**
	 * @dev Used to validate if a user has been borrowing from any reserve
	 * @param self The configuration object
	 * @return True if the user has been borrowing any reserve, false otherwise
	 **/
	function isBorrowingAny(DataTypes.UserConfigurationMap memory self) internal pure returns (bool) {
		return self.data & BORROWING_MASK != 0;
	}

	/**
	 * @dev Used to validate if a user has not been using any reserve
	 * @param self The configuration object
	 * @return True if the user has been borrowing any reserve, false otherwise
	 **/
	function isEmpty(DataTypes.UserConfigurationMap memory self) internal pure returns (bool) {
		return self.data == 0;
	}
}

// File: contracts/lending/libraries/helpers/Errors.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

/**
 * @title Errors library
 * @author Aave
 * @notice Defines the error messages emitted by the different contracts of the Aave protocol
 * @dev Error messages prefix glossary:
 *  - VL = ValidationLogic
 *  - MATH = Math libraries
 *  - CT = Common errors between tokens (AToken, VariableDebtToken and StableDebtToken)
 *  - AT = AToken
 *  - SDT = StableDebtToken
 *  - VDT = VariableDebtToken
 *  - LP = LendingPool
 *  - LPAPR = LendingPoolAddressesProviderRegistry
 *  - LPC = LendingPoolConfiguration
 *  - RL = ReserveLogic
 *  - LPCM = LendingPoolCollateralManager
 *  - P = Pausable
 */
library Errors {
	//common errors
	string public constant CALLER_NOT_POOL_ADMIN = "33"; // 'The caller must be the pool admin'
	string public constant BORROW_ALLOWANCE_NOT_ENOUGH = "59"; // User borrows on behalf, but allowance are too small

	//contract specific errors
	string public constant VL_INVALID_AMOUNT = "1"; // 'Amount must be greater than 0'
	string public constant VL_NO_ACTIVE_RESERVE = "2"; // 'Action requires an active reserve'
	string public constant VL_RESERVE_FROZEN = "3"; // 'Action cannot be performed because the reserve is frozen'
	string public constant VL_CURRENT_AVAILABLE_LIQUIDITY_NOT_ENOUGH = "4"; // 'The current liquidity is not enough'
	string public constant VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE = "5"; // 'User cannot withdraw more than the available balance'
	string public constant VL_TRANSFER_NOT_ALLOWED = "6"; // 'Transfer cannot be allowed.'
	string public constant VL_BORROWING_NOT_ENABLED = "7"; // 'Borrowing is not enabled'
	string public constant VL_INVALID_INTEREST_RATE_MODE_SELECTED = "8"; // 'Invalid interest rate mode selected'
	string public constant VL_COLLATERAL_BALANCE_IS_0 = "9"; // 'The collateral balance is 0'
	string public constant VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD = "10"; // 'Health factor is lesser than the liquidation threshold'
	string public constant VL_COLLATERAL_CANNOT_COVER_NEW_BORROW = "11"; // 'There is not enough collateral to cover a new borrow'
	string public constant VL_STABLE_BORROWING_NOT_ENABLED = "12"; // stable borrowing not enabled
	string public constant VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY = "13"; // collateral is (mostly) the same currency that is being borrowed
	string public constant VL_AMOUNT_BIGGER_THAN_MAX_LOAN_SIZE_STABLE = "14"; // 'The requested amount is greater than the max loan size in stable rate mode
	string public constant VL_NO_DEBT_OF_SELECTED_TYPE = "15"; // 'for repayment of stable debt, the user needs to have stable debt, otherwise, he needs to have variable debt'
	string public constant VL_NO_EXPLICIT_AMOUNT_TO_REPAY_ON_BEHALF = "16"; // 'To repay on behalf of an user an explicit amount to repay is needed'
	string public constant VL_NO_STABLE_RATE_LOAN_IN_RESERVE = "17"; // 'User does not have a stable rate loan in progress on this reserve'
	string public constant VL_NO_VARIABLE_RATE_LOAN_IN_RESERVE = "18"; // 'User does not have a variable rate loan in progress on this reserve'
	string public constant VL_UNDERLYING_BALANCE_NOT_GREATER_THAN_0 = "19"; // 'The underlying balance needs to be greater than 0'
	string public constant VL_DEPOSIT_ALREADY_IN_USE = "20"; // 'User deposit is already being used as collateral'
	string public constant LP_NOT_ENOUGH_STABLE_BORROW_BALANCE = "21"; // 'User does not have any stable rate loan for this reserve'
	string public constant LP_INTEREST_RATE_REBALANCE_CONDITIONS_NOT_MET = "22"; // 'Interest rate rebalance conditions were not met'
	string public constant LP_LIQUIDATION_CALL_FAILED = "23"; // 'Liquidation call failed'
	string public constant LP_NOT_ENOUGH_LIQUIDITY_TO_BORROW = "24"; // 'There is not enough liquidity available to borrow'
	string public constant LP_REQUESTED_AMOUNT_TOO_SMALL = "25"; // 'The requested amount is too small for a FlashLoan.'
	string public constant LP_INCONSISTENT_PROTOCOL_ACTUAL_BALANCE = "26"; // 'The actual balance of the protocol is inconsistent'
	string public constant LP_CALLER_NOT_LENDING_POOL_CONFIGURATOR = "27"; // 'The caller of the function is not the lending pool configurator'
	string public constant LP_INCONSISTENT_FLASHLOAN_PARAMS = "28";
	string public constant CT_CALLER_MUST_BE_LENDING_POOL = "29"; // 'The caller of this function must be a lending pool'
	string public constant CT_CANNOT_GIVE_ALLOWANCE_TO_HIMSELF = "30"; // 'User cannot give allowance to himself'
	string public constant CT_TRANSFER_AMOUNT_NOT_GT_0 = "31"; // 'Transferred amount needs to be greater than zero'
	string public constant RL_RESERVE_ALREADY_INITIALIZED = "32"; // 'Reserve has already been initialized'
	string public constant LPC_RESERVE_LIQUIDITY_NOT_0 = "34"; // 'The liquidity of the reserve needs to be 0'
	string public constant LPC_INVALID_ATOKEN_POOL_ADDRESS = "35"; // 'The liquidity of the reserve needs to be 0'
	string public constant LPC_INVALID_STABLE_DEBT_TOKEN_POOL_ADDRESS = "36"; // 'The liquidity of the reserve needs to be 0'
	string public constant LPC_INVALID_VARIABLE_DEBT_TOKEN_POOL_ADDRESS = "37"; // 'The liquidity of the reserve needs to be 0'
	string public constant LPC_INVALID_STABLE_DEBT_TOKEN_UNDERLYING_ADDRESS = "38"; // 'The liquidity of the reserve needs to be 0'
	string public constant LPC_INVALID_VARIABLE_DEBT_TOKEN_UNDERLYING_ADDRESS = "39"; // 'The liquidity of the reserve needs to be 0'
	string public constant LPC_INVALID_ADDRESSES_PROVIDER_ID = "40"; // 'The liquidity of the reserve needs to be 0'
	string public constant LPC_INVALID_CONFIGURATION = "75"; // 'Invalid risk parameters for the reserve'
	string public constant LPC_CALLER_NOT_EMERGENCY_ADMIN = "76"; // 'The caller must be the emergency admin'
	string public constant LPAPR_PROVIDER_NOT_REGISTERED = "41"; // 'Provider is not registered'
	string public constant LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD = "42"; // 'Health factor is not below the threshold'
	string public constant LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED = "43"; // 'The collateral chosen cannot be liquidated'
	string public constant LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER = "44"; // 'User did not borrow the specified currency'
	string public constant LPCM_NOT_ENOUGH_LIQUIDITY_TO_LIQUIDATE = "45"; // "There isn't enough liquidity available to liquidate"
	string public constant LPCM_NO_ERRORS = "46"; // 'No errors'
	string public constant LP_INVALID_FLASHLOAN_MODE = "47"; //Invalid flashloan mode selected
	string public constant MATH_MULTIPLICATION_OVERFLOW = "48";
	string public constant MATH_ADDITION_OVERFLOW = "49";
	string public constant MATH_DIVISION_BY_ZERO = "50";
	string public constant RL_LIQUIDITY_INDEX_OVERFLOW = "51"; //  Liquidity index overflows uint128
	string public constant RL_VARIABLE_BORROW_INDEX_OVERFLOW = "52"; //  Variable borrow index overflows uint128
	string public constant RL_LIQUIDITY_RATE_OVERFLOW = "53"; //  Liquidity rate overflows uint128
	string public constant RL_VARIABLE_BORROW_RATE_OVERFLOW = "54"; //  Variable borrow rate overflows uint128
	string public constant RL_STABLE_BORROW_RATE_OVERFLOW = "55"; //  Stable borrow rate overflows uint128
	string public constant CT_INVALID_MINT_AMOUNT = "56"; //invalid amount to mint
	string public constant LP_FAILED_REPAY_WITH_COLLATERAL = "57";
	string public constant CT_INVALID_BURN_AMOUNT = "58"; //invalid amount to burn
	string public constant LP_FAILED_COLLATERAL_SWAP = "60";
	string public constant LP_INVALID_EQUAL_ASSETS_TO_SWAP = "61";
	string public constant LP_REENTRANCY_NOT_ALLOWED = "62";
	string public constant LP_CALLER_MUST_BE_AN_ATOKEN = "63";
	string public constant LP_IS_PAUSED = "64"; // 'Pool is paused'
	string public constant LP_NO_MORE_RESERVES_ALLOWED = "65";
	string public constant LP_INVALID_FLASH_LOAN_EXECUTOR_RETURN = "66";
	string public constant RC_INVALID_LTV = "67";
	string public constant RC_INVALID_LIQ_THRESHOLD = "68";
	string public constant RC_INVALID_LIQ_BONUS = "69";
	string public constant RC_INVALID_DECIMALS = "70";
	string public constant RC_INVALID_RESERVE_FACTOR = "71";
	string public constant LPAPR_INVALID_ADDRESSES_PROVIDER_ID = "72";
	string public constant VL_INCONSISTENT_FLASHLOAN_PARAMS = "73";
	string public constant LP_INCONSISTENT_PARAMS_LENGTH = "74";
	string public constant UL_INVALID_INDEX = "77";
	string public constant LP_NOT_CONTRACT = "78";
	string public constant SDT_STABLE_DEBT_OVERFLOW = "79";
	string public constant SDT_BURN_EXCEEDS_BALANCE = "80";

	enum CollateralManagerErrors {
		NO_ERROR,
		NO_COLLATERAL_AVAILABLE,
		COLLATERAL_CANNOT_BE_LIQUIDATED,
		CURRRENCY_NOT_BORROWED,
		HEALTH_FACTOR_ABOVE_THRESHOLD,
		NOT_ENOUGH_LIQUIDITY,
		NO_ACTIVE_RESERVE,
		HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD,
		INVALID_EQUAL_ASSETS_TO_SWAP,
		FROZEN_RESERVE
	}
}

// File: contracts/lending/libraries/helpers/Helpers.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {DataTypes} from "../types/DataTypes.sol";

/**
 * @title Helpers library
 * @author Aave
 */
library Helpers {
	/**
	 * @dev Fetches the user current stable and variable debt balances
	 * @param user The user address
	 * @param reserve The reserve data object
	 * @return The stable and variable debt balance
	 **/
	function getUserCurrentDebt(
		address user,
		DataTypes.ReserveData storage reserve
	) internal view returns (uint256, uint256) {
		return (
			IERC20(reserve.stableDebtTokenAddress).balanceOf(user),
			IERC20(reserve.variableDebtTokenAddress).balanceOf(user)
		);
	}

	function getUserCurrentDebtMemory(
		address user,
		DataTypes.ReserveData memory reserve
	) internal view returns (uint256, uint256) {
		return (
			IERC20(reserve.stableDebtTokenAddress).balanceOf(user),
			IERC20(reserve.variableDebtTokenAddress).balanceOf(user)
		);
	}
}

// File: contracts/lending/libraries/logic/GenericLogic.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {ReserveLogic} from "./ReserveLogic.sol";
import {ReserveConfiguration} from "../configuration/ReserveConfiguration.sol";
import {UserConfiguration} from "../configuration/UserConfiguration.sol";
import {WadRayMath} from "../math/WadRayMath.sol";
import {PercentageMath} from "../math/PercentageMath.sol";
import {IPriceOracleGetter} from "../../../interfaces/IPriceOracleGetter.sol";
import {DataTypes} from "../types/DataTypes.sol";

/**
 * @title GenericLogic library
 * @author Aave
 * @title Implements protocol-level logic to calculate and validate the state of a user
 */
library GenericLogic {
	using ReserveLogic for DataTypes.ReserveData;
	using SafeMath for uint256;
	using WadRayMath for uint256;
	using PercentageMath for uint256;
	using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
	using UserConfiguration for DataTypes.UserConfigurationMap;

	uint256 public constant HEALTH_FACTOR_LIQUIDATION_THRESHOLD = 1 ether;

	struct balanceDecreaseAllowedLocalVars {
		uint256 decimals;
		uint256 liquidationThreshold;
		uint256 totalCollateralInETH;
		uint256 totalDebtInETH;
		uint256 avgLiquidationThreshold;
		uint256 amountToDecreaseInETH;
		uint256 collateralBalanceAfterDecrease;
		uint256 liquidationThresholdAfterDecrease;
		uint256 healthFactorAfterDecrease;
		bool reserveUsageAsCollateralEnabled;
	}

	/**
	 * @dev Checks if a specific balance decrease is allowed
	 * (i.e. doesn't bring the user borrow position health factor under HEALTH_FACTOR_LIQUIDATION_THRESHOLD)
	 * @param asset The address of the underlying asset of the reserve
	 * @param user The address of the user
	 * @param amount The amount to decrease
	 * @param reservesData The data of all the reserves
	 * @param userConfig The user configuration
	 * @param reserves The list of all the active reserves
	 * @param oracle The address of the oracle contract
	 * @return true if the decrease of the balance is allowed
	 **/
	function balanceDecreaseAllowed(
		address asset,
		address user,
		uint256 amount,
		mapping(address => DataTypes.ReserveData) storage reservesData,
		DataTypes.UserConfigurationMap calldata userConfig,
		mapping(uint256 => address) storage reserves,
		uint256 reservesCount,
		address oracle
	) external view returns (bool) {
		if (!userConfig.isBorrowingAny() || !userConfig.isUsingAsCollateral(reservesData[asset].id)) {
			return true;
		}

		balanceDecreaseAllowedLocalVars memory vars;

		(, vars.liquidationThreshold, , vars.decimals, ) = reservesData[asset].configuration.getParams();

		if (vars.liquidationThreshold == 0) {
			return true;
		}

		(vars.totalCollateralInETH, vars.totalDebtInETH, , vars.avgLiquidationThreshold, ) = calculateUserAccountData(
			user,
			reservesData,
			userConfig,
			reserves,
			reservesCount,
			oracle
		);

		if (vars.totalDebtInETH == 0) {
			return true;
		}

		vars.amountToDecreaseInETH = IPriceOracleGetter(oracle).getAssetPrice(asset).mul(amount).div(
			10 ** vars.decimals
		);

		vars.collateralBalanceAfterDecrease = vars.totalCollateralInETH.sub(vars.amountToDecreaseInETH);

		//if there is a borrow, there can't be 0 collateral
		if (vars.collateralBalanceAfterDecrease == 0) {
			return false;
		}

		vars.liquidationThresholdAfterDecrease = vars
			.totalCollateralInETH
			.mul(vars.avgLiquidationThreshold)
			.sub(vars.amountToDecreaseInETH.mul(vars.liquidationThreshold))
			.div(vars.collateralBalanceAfterDecrease);

		uint256 healthFactorAfterDecrease = calculateHealthFactorFromBalances(
			vars.collateralBalanceAfterDecrease,
			vars.totalDebtInETH,
			vars.liquidationThresholdAfterDecrease
		);

		return healthFactorAfterDecrease >= GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD;
	}

	struct CalculateUserAccountDataVars {
		uint256 reserveUnitPrice;
		uint256 tokenUnit;
		uint256 compoundedLiquidityBalance;
		uint256 compoundedBorrowBalance;
		uint256 decimals;
		uint256 ltv;
		uint256 liquidationThreshold;
		uint256 i;
		uint256 healthFactor;
		uint256 totalCollateralInETH;
		uint256 totalDebtInETH;
		uint256 avgLtv;
		uint256 avgLiquidationThreshold;
		uint256 reservesLength;
		bool healthFactorBelowThreshold;
		address currentReserveAddress;
		bool usageAsCollateralEnabled;
		bool userUsesReserveAsCollateral;
	}

	/**
	 * @dev Calculates the user data across the reserves.
	 * this includes the total liquidity/collateral/borrow balances in ETH,
	 * the average Loan To Value, the average Liquidation Ratio, and the Health factor.
	 * @param user The address of the user
	 * @param reservesData Data of all the reserves
	 * @param userConfig The configuration of the user
	 * @param reserves The list of the available reserves
	 * @param oracle The price oracle address
	 * @return The total collateral and total debt of the user in ETH, the avg ltv, liquidation threshold and the HF
	 **/
	function calculateUserAccountData(
		address user,
		mapping(address => DataTypes.ReserveData) storage reservesData,
		DataTypes.UserConfigurationMap memory userConfig,
		mapping(uint256 => address) storage reserves,
		uint256 reservesCount,
		address oracle
	) internal view returns (uint256, uint256, uint256, uint256, uint256) {
		CalculateUserAccountDataVars memory vars;

		if (userConfig.isEmpty()) {
			return (0, 0, 0, 0, type(uint256).max);
		}
		for (vars.i = 0; vars.i < reservesCount; vars.i++) {
			if (!userConfig.isUsingAsCollateralOrBorrowing(vars.i)) {
				continue;
			}

			vars.currentReserveAddress = reserves[vars.i];
			DataTypes.ReserveData storage currentReserve = reservesData[vars.currentReserveAddress];

			(vars.ltv, vars.liquidationThreshold, , vars.decimals, ) = currentReserve.configuration.getParams();

			vars.tokenUnit = 10 ** vars.decimals;
			vars.reserveUnitPrice = IPriceOracleGetter(oracle).getAssetPrice(vars.currentReserveAddress);

			if (vars.liquidationThreshold != 0 && userConfig.isUsingAsCollateral(vars.i)) {
				vars.compoundedLiquidityBalance = IERC20(currentReserve.aTokenAddress).balanceOf(user);

				uint256 liquidityBalanceETH = vars.reserveUnitPrice.mul(vars.compoundedLiquidityBalance).div(
					vars.tokenUnit
				);

				vars.totalCollateralInETH = vars.totalCollateralInETH.add(liquidityBalanceETH);

				vars.avgLtv = vars.avgLtv.add(liquidityBalanceETH.mul(vars.ltv));
				vars.avgLiquidationThreshold = vars.avgLiquidationThreshold.add(
					liquidityBalanceETH.mul(vars.liquidationThreshold)
				);
			}

			if (userConfig.isBorrowing(vars.i)) {
				vars.compoundedBorrowBalance = IERC20(currentReserve.stableDebtTokenAddress).balanceOf(user);
				vars.compoundedBorrowBalance = vars.compoundedBorrowBalance.add(
					IERC20(currentReserve.variableDebtTokenAddress).balanceOf(user)
				);

				vars.totalDebtInETH = vars.totalDebtInETH.add(
					vars.reserveUnitPrice.mul(vars.compoundedBorrowBalance).div(vars.tokenUnit)
				);
			}
		}

		vars.avgLtv = vars.totalCollateralInETH > 0 ? vars.avgLtv.div(vars.totalCollateralInETH) : 0;
		vars.avgLiquidationThreshold = vars.totalCollateralInETH > 0
			? vars.avgLiquidationThreshold.div(vars.totalCollateralInETH)
			: 0;

		vars.healthFactor = calculateHealthFactorFromBalances(
			vars.totalCollateralInETH,
			vars.totalDebtInETH,
			vars.avgLiquidationThreshold
		);
		return (
			vars.totalCollateralInETH,
			vars.totalDebtInETH,
			vars.avgLtv,
			vars.avgLiquidationThreshold,
			vars.healthFactor
		);
	}

	/**
	 * @dev Calculates the health factor from the corresponding balances
	 * @param totalCollateralInETH The total collateral in ETH
	 * @param totalDebtInETH The total debt in ETH
	 * @param liquidationThreshold The avg liquidation threshold
	 * @return The health factor calculated from the balances provided
	 **/
	function calculateHealthFactorFromBalances(
		uint256 totalCollateralInETH,
		uint256 totalDebtInETH,
		uint256 liquidationThreshold
	) internal pure returns (uint256) {
		if (totalDebtInETH == 0) return type(uint256).max;

		return (totalCollateralInETH.percentMul(liquidationThreshold)).wadDiv(totalDebtInETH);
	}

	/**
	 * @dev Calculates the equivalent amount in ETH that an user can borrow, depending on the available collateral and the
	 * average Loan To Value
	 * @param totalCollateralInETH The total collateral in ETH
	 * @param totalDebtInETH The total borrow balance
	 * @param ltv The average loan to value
	 * @return the amount available to borrow in ETH for the user
	 **/

	function calculateAvailableBorrowsETH(
		uint256 totalCollateralInETH,
		uint256 totalDebtInETH,
		uint256 ltv
	) internal pure returns (uint256) {
		uint256 availableBorrowsETH = totalCollateralInETH.percentMul(ltv);

		if (availableBorrowsETH < totalDebtInETH) {
			return 0;
		}

		availableBorrowsETH = availableBorrowsETH.sub(totalDebtInETH);
		return availableBorrowsETH;
	}
}

// File: contracts/lending/libraries/logic/ReserveLogic.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IAToken} from "../../../interfaces/IAToken.sol";
import {IStableDebtToken} from "../../../interfaces/IStableDebtToken.sol";
import {IVariableDebtToken} from "../../../interfaces/IVariableDebtToken.sol";
import {IReserveInterestRateStrategy} from "../../../interfaces/IReserveInterestRateStrategy.sol";
import {ReserveConfiguration} from "../configuration/ReserveConfiguration.sol";
import {MathUtils} from "../math/MathUtils.sol";
import {WadRayMath} from "../math/WadRayMath.sol";
import {PercentageMath} from "../math/PercentageMath.sol";
import {Errors} from "../helpers/Errors.sol";
import {DataTypes} from "../types/DataTypes.sol";

/**
 * @title ReserveLogic library
 * @author Aave
 * @notice Implements the logic to update the reserves state
 */
library ReserveLogic {
	using SafeMath for uint256;
	using WadRayMath for uint256;
	using PercentageMath for uint256;
	using SafeERC20 for IERC20;

	/**
	 * @dev Emitted when the state of a reserve is updated
	 * @param asset The address of the underlying asset of the reserve
	 * @param liquidityRate The new liquidity rate
	 * @param stableBorrowRate The new stable borrow rate
	 * @param variableBorrowRate The new variable borrow rate
	 * @param liquidityIndex The new liquidity index
	 * @param variableBorrowIndex The new variable borrow index
	 **/
	event ReserveDataUpdated(
		address indexed asset,
		uint256 liquidityRate,
		uint256 stableBorrowRate,
		uint256 variableBorrowRate,
		uint256 liquidityIndex,
		uint256 variableBorrowIndex
	);

	using ReserveLogic for DataTypes.ReserveData;
	using ReserveConfiguration for DataTypes.ReserveConfigurationMap;

	/**
	 * @dev Returns the ongoing normalized income for the reserve
	 * A value of 1e27 means there is no income. As time passes, the income is accrued
	 * A value of 2*1e27 means for each unit of asset one unit of income has been accrued
	 * @param reserve The reserve object
	 * @return the normalized income. expressed in ray
	 **/
	function getNormalizedIncome(DataTypes.ReserveData storage reserve) internal view returns (uint256) {
		uint40 timestamp = reserve.lastUpdateTimestamp;

		//solium-disable-next-line
		if (timestamp == uint40(block.timestamp)) {
			//if the index was updated in the same block, no need to perform any calculation
			return reserve.liquidityIndex;
		}

		uint256 cumulated = MathUtils.calculateLinearInterest(reserve.currentLiquidityRate, timestamp).rayMul(
			reserve.liquidityIndex
		);

		return cumulated;
	}

	/**
	 * @dev Returns the ongoing normalized variable debt for the reserve
	 * A value of 1e27 means there is no debt. As time passes, the income is accrued
	 * A value of 2*1e27 means that for each unit of debt, one unit worth of interest has been accumulated
	 * @param reserve The reserve object
	 * @return The normalized variable debt. expressed in ray
	 **/
	function getNormalizedDebt(DataTypes.ReserveData storage reserve) internal view returns (uint256) {
		uint40 timestamp = reserve.lastUpdateTimestamp;

		//solium-disable-next-line
		if (timestamp == uint40(block.timestamp)) {
			//if the index was updated in the same block, no need to perform any calculation
			return reserve.variableBorrowIndex;
		}

		uint256 cumulated = MathUtils.calculateCompoundedInterest(reserve.currentVariableBorrowRate, timestamp).rayMul(
			reserve.variableBorrowIndex
		);

		return cumulated;
	}

	/**
	 * @dev Updates the liquidity cumulative index and the variable borrow index.
	 * @param reserve the reserve object
	 **/
	function updateState(DataTypes.ReserveData storage reserve) internal {
		uint256 scaledVariableDebt = IVariableDebtToken(reserve.variableDebtTokenAddress).scaledTotalSupply();
		uint256 previousVariableBorrowIndex = reserve.variableBorrowIndex;
		uint256 previousLiquidityIndex = reserve.liquidityIndex;
		uint40 lastUpdatedTimestamp = reserve.lastUpdateTimestamp;

		(uint256 newLiquidityIndex, uint256 newVariableBorrowIndex) = _updateIndexes(
			reserve,
			scaledVariableDebt,
			previousLiquidityIndex,
			previousVariableBorrowIndex,
			lastUpdatedTimestamp
		);

		_mintToTreasury(
			reserve,
			scaledVariableDebt,
			previousVariableBorrowIndex,
			newLiquidityIndex,
			newVariableBorrowIndex,
			lastUpdatedTimestamp
		);
	}

	/**
	 * @dev Accumulates a predefined amount of asset to the reserve as a fixed, instantaneous income. Used for example to accumulate
	 * the flashloan fee to the reserve, and spread it between all the depositors
	 * @param reserve The reserve object
	 * @param totalLiquidity The total liquidity available in the reserve
	 * @param amount The amount to accomulate
	 **/
	function cumulateToLiquidityIndex(
		DataTypes.ReserveData storage reserve,
		uint256 totalLiquidity,
		uint256 amount
	) internal {
		uint256 amountToLiquidityRatio = amount.wadToRay().rayDiv(totalLiquidity.wadToRay());

		uint256 result = amountToLiquidityRatio.add(WadRayMath.ray());

		result = result.rayMul(reserve.liquidityIndex);
		require(result <= type(uint128).max, Errors.RL_LIQUIDITY_INDEX_OVERFLOW);

		reserve.liquidityIndex = uint128(result);
	}

	/**
	 * @dev Initializes a reserve
	 * @param reserve The reserve object
	 * @param aTokenAddress The address of the overlying atoken contract
	 * @param interestRateStrategyAddress The address of the interest rate strategy contract
	 **/
	function init(
		DataTypes.ReserveData storage reserve,
		address aTokenAddress,
		address stableDebtTokenAddress,
		address variableDebtTokenAddress,
		address interestRateStrategyAddress
	) external {
		require(reserve.aTokenAddress == address(0), Errors.RL_RESERVE_ALREADY_INITIALIZED);

		reserve.liquidityIndex = uint128(WadRayMath.ray());
		reserve.variableBorrowIndex = uint128(WadRayMath.ray());
		reserve.aTokenAddress = aTokenAddress;
		reserve.stableDebtTokenAddress = stableDebtTokenAddress;
		reserve.variableDebtTokenAddress = variableDebtTokenAddress;
		reserve.interestRateStrategyAddress = interestRateStrategyAddress;
	}

	struct UpdateInterestRatesLocalVars {
		address stableDebtTokenAddress;
		uint256 availableLiquidity;
		uint256 totalStableDebt;
		uint256 newLiquidityRate;
		uint256 newStableRate;
		uint256 newVariableRate;
		uint256 avgStableRate;
		uint256 totalVariableDebt;
	}

	/**
	 * @dev Updates the reserve current stable borrow rate, the current variable borrow rate and the current liquidity rate
	 * @param reserve The address of the reserve to be updated
	 * @param liquidityAdded The amount of liquidity added to the protocol (deposit or repay) in the previous action
	 * @param liquidityTaken The amount of liquidity taken from the protocol (redeem or borrow)
	 **/
	function updateInterestRates(
		DataTypes.ReserveData storage reserve,
		address reserveAddress,
		address aTokenAddress,
		uint256 liquidityAdded,
		uint256 liquidityTaken
	) internal {
		UpdateInterestRatesLocalVars memory vars;

		vars.stableDebtTokenAddress = reserve.stableDebtTokenAddress;

		(vars.totalStableDebt, vars.avgStableRate) = IStableDebtToken(vars.stableDebtTokenAddress)
			.getTotalSupplyAndAvgRate();

		//calculates the total variable debt locally using the scaled total supply instead
		//of totalSupply(), as it's noticeably cheaper. Also, the index has been
		//updated by the previous updateState() call
		vars.totalVariableDebt = IVariableDebtToken(reserve.variableDebtTokenAddress).scaledTotalSupply().rayMul(
			reserve.variableBorrowIndex
		);

		(vars.newLiquidityRate, vars.newStableRate, vars.newVariableRate) = IReserveInterestRateStrategy(
			reserve.interestRateStrategyAddress
		).calculateInterestRates(
				reserveAddress,
				aTokenAddress,
				liquidityAdded,
				liquidityTaken,
				vars.totalStableDebt,
				vars.totalVariableDebt,
				vars.avgStableRate,
				reserve.configuration.getReserveFactor()
			);
		require(vars.newLiquidityRate <= type(uint128).max, Errors.RL_LIQUIDITY_RATE_OVERFLOW);
		require(vars.newStableRate <= type(uint128).max, Errors.RL_STABLE_BORROW_RATE_OVERFLOW);
		require(vars.newVariableRate <= type(uint128).max, Errors.RL_VARIABLE_BORROW_RATE_OVERFLOW);

		reserve.currentLiquidityRate = uint128(vars.newLiquidityRate);
		reserve.currentStableBorrowRate = uint128(vars.newStableRate);
		reserve.currentVariableBorrowRate = uint128(vars.newVariableRate);

		emit ReserveDataUpdated(
			reserveAddress,
			vars.newLiquidityRate,
			vars.newStableRate,
			vars.newVariableRate,
			reserve.liquidityIndex,
			reserve.variableBorrowIndex
		);
	}

	struct MintToTreasuryLocalVars {
		uint256 currentStableDebt;
		uint256 principalStableDebt;
		uint256 previousStableDebt;
		uint256 currentVariableDebt;
		uint256 previousVariableDebt;
		uint256 avgStableRate;
		uint256 cumulatedStableInterest;
		uint256 totalDebtAccrued;
		uint256 amountToMint;
		uint256 reserveFactor;
		uint40 stableSupplyUpdatedTimestamp;
	}

	/**
	 * @dev Mints part of the repaid interest to the reserve treasury as a function of the reserveFactor for the
	 * specific asset.
	 * @param reserve The reserve reserve to be updated
	 * @param scaledVariableDebt The current scaled total variable debt
	 * @param previousVariableBorrowIndex The variable borrow index before the last accumulation of the interest
	 * @param newLiquidityIndex The new liquidity index
	 * @param newVariableBorrowIndex The variable borrow index after the last accumulation of the interest
	 **/
	function _mintToTreasury(
		DataTypes.ReserveData storage reserve,
		uint256 scaledVariableDebt,
		uint256 previousVariableBorrowIndex,
		uint256 newLiquidityIndex,
		uint256 newVariableBorrowIndex,
		uint40 timestamp
	) internal {
		MintToTreasuryLocalVars memory vars;

		vars.reserveFactor = reserve.configuration.getReserveFactor();

		if (vars.reserveFactor == 0) {
			return;
		}

		//fetching the principal, total stable debt and the avg stable rate
		(
			vars.principalStableDebt,
			vars.currentStableDebt,
			vars.avgStableRate,
			vars.stableSupplyUpdatedTimestamp
		) = IStableDebtToken(reserve.stableDebtTokenAddress).getSupplyData();

		//calculate the last principal variable debt
		vars.previousVariableDebt = scaledVariableDebt.rayMul(previousVariableBorrowIndex);

		//calculate the new total supply after accumulation of the index
		vars.currentVariableDebt = scaledVariableDebt.rayMul(newVariableBorrowIndex);

		//calculate the stable debt until the last timestamp update
		vars.cumulatedStableInterest = MathUtils.calculateCompoundedInterest(
			vars.avgStableRate,
			vars.stableSupplyUpdatedTimestamp,
			timestamp
		);

		vars.previousStableDebt = vars.principalStableDebt.rayMul(vars.cumulatedStableInterest);

		//debt accrued is the sum of the current debt minus the sum of the debt at the last update
		vars.totalDebtAccrued = vars.currentVariableDebt.add(vars.currentStableDebt).sub(vars.previousVariableDebt).sub(
			vars.previousStableDebt
		);

		vars.amountToMint = vars.totalDebtAccrued.percentMul(vars.reserveFactor);

		if (vars.amountToMint != 0) {
			IAToken(reserve.aTokenAddress).mintToTreasury(vars.amountToMint, newLiquidityIndex);
		}
	}

	/**
	 * @dev Updates the reserve indexes and the timestamp of the update
	 * @param reserve The reserve reserve to be updated
	 * @param scaledVariableDebt The scaled variable debt
	 * @param liquidityIndex The last stored liquidity index
	 * @param variableBorrowIndex The last stored variable borrow index
	 **/
	function _updateIndexes(
		DataTypes.ReserveData storage reserve,
		uint256 scaledVariableDebt,
		uint256 liquidityIndex,
		uint256 variableBorrowIndex,
		uint40 timestamp
	) internal returns (uint256, uint256) {
		uint256 currentLiquidityRate = reserve.currentLiquidityRate;

		uint256 newLiquidityIndex = liquidityIndex;
		uint256 newVariableBorrowIndex = variableBorrowIndex;

		//only cumulating if there is any income being produced
		if (currentLiquidityRate > 0) {
			uint256 cumulatedLiquidityInterest = MathUtils.calculateLinearInterest(currentLiquidityRate, timestamp);
			newLiquidityIndex = cumulatedLiquidityInterest.rayMul(liquidityIndex);
			require(newLiquidityIndex <= type(uint128).max, Errors.RL_LIQUIDITY_INDEX_OVERFLOW);

			reserve.liquidityIndex = uint128(newLiquidityIndex);

			//as the liquidity rate might come only from stable rate loans, we need to ensure
			//that there is actual variable debt before accumulating
			if (scaledVariableDebt != 0) {
				uint256 cumulatedVariableBorrowInterest = MathUtils.calculateCompoundedInterest(
					reserve.currentVariableBorrowRate,
					timestamp
				);
				newVariableBorrowIndex = cumulatedVariableBorrowInterest.rayMul(variableBorrowIndex);
				require(newVariableBorrowIndex <= type(uint128).max, Errors.RL_VARIABLE_BORROW_INDEX_OVERFLOW);
				reserve.variableBorrowIndex = uint128(newVariableBorrowIndex);
			}
		}

		//solium-disable-next-line
		reserve.lastUpdateTimestamp = uint40(block.timestamp);
		return (newLiquidityIndex, newVariableBorrowIndex);
	}
}

// File: contracts/lending/libraries/logic/ValidationLogic.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {ReserveLogic} from "./ReserveLogic.sol";
import {GenericLogic} from "./GenericLogic.sol";
import {WadRayMath} from "../math/WadRayMath.sol";
import {PercentageMath} from "../math/PercentageMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {ReserveConfiguration} from "../configuration/ReserveConfiguration.sol";
import {UserConfiguration} from "../configuration/UserConfiguration.sol";
import {Errors} from "../helpers/Errors.sol";
import {Helpers} from "../helpers/Helpers.sol";
import {IReserveInterestRateStrategy} from "../../../interfaces/IReserveInterestRateStrategy.sol";
import {DataTypes} from "../types/DataTypes.sol";

/**
 * @title ReserveLogic library
 * @author Aave
 * @notice Implements functions to validate the different actions of the protocol
 */
library ValidationLogic {
	using ReserveLogic for DataTypes.ReserveData;
	using SafeMath for uint256;
	using WadRayMath for uint256;
	using PercentageMath for uint256;
	using SafeERC20 for IERC20;
	using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
	using UserConfiguration for DataTypes.UserConfigurationMap;

	uint256 public constant REBALANCE_UP_LIQUIDITY_RATE_THRESHOLD = 4000;
	uint256 public constant REBALANCE_UP_USAGE_RATIO_THRESHOLD = 0.95 * 1e27; //usage ratio of 95%

	/**
	 * @dev Validates a deposit action
	 * @param reserve The reserve object on which the user is depositing
	 * @param amount The amount to be deposited
	 */
	function validateDeposit(DataTypes.ReserveData storage reserve, uint256 amount) external view {
		(bool isActive, bool isFrozen, , ) = reserve.configuration.getFlags();

		require(amount != 0, Errors.VL_INVALID_AMOUNT);
		require(isActive, Errors.VL_NO_ACTIVE_RESERVE);
		require(!isFrozen, Errors.VL_RESERVE_FROZEN);
	}

	/**
	 * @dev Validates a withdraw action
	 * @param reserveAddress The address of the reserve
	 * @param amount The amount to be withdrawn
	 * @param userBalance The balance of the user
	 * @param reservesData The reserves state
	 * @param userConfig The user configuration
	 * @param reserves The addresses of the reserves
	 * @param reservesCount The number of reserves
	 * @param oracle The price oracle
	 */
	function validateWithdraw(
		address reserveAddress,
		uint256 amount,
		uint256 userBalance,
		mapping(address => DataTypes.ReserveData) storage reservesData,
		DataTypes.UserConfigurationMap storage userConfig,
		mapping(uint256 => address) storage reserves,
		uint256 reservesCount,
		address oracle
	) external view {
		require(amount != 0, Errors.VL_INVALID_AMOUNT);
		require(amount <= userBalance, Errors.VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE);

		(bool isActive, , , ) = reservesData[reserveAddress].configuration.getFlags();
		require(isActive, Errors.VL_NO_ACTIVE_RESERVE);

		require(
			GenericLogic.balanceDecreaseAllowed(
				reserveAddress,
				msg.sender,
				amount,
				reservesData,
				userConfig,
				reserves,
				reservesCount,
				oracle
			),
			Errors.VL_TRANSFER_NOT_ALLOWED
		);
	}

	struct ValidateBorrowLocalVars {
		uint256 currentLtv;
		uint256 currentLiquidationThreshold;
		uint256 amountOfCollateralNeededETH;
		uint256 userCollateralBalanceETH;
		uint256 userBorrowBalanceETH;
		uint256 availableLiquidity;
		uint256 healthFactor;
		bool isActive;
		bool isFrozen;
		bool borrowingEnabled;
		bool stableRateBorrowingEnabled;
	}

	/**
	 * @dev Validates a borrow action
	 * @param asset The address of the asset to borrow
	 * @param reserve The reserve state from which the user is borrowing
	 * @param userAddress The address of the user
	 * @param amount The amount to be borrowed
	 * @param amountInETH The amount to be borrowed, in ETH
	 * @param interestRateMode The interest rate mode at which the user is borrowing
	 * @param maxStableLoanPercent The max amount of the liquidity that can be borrowed at stable rate, in percentage
	 * @param reservesData The state of all the reserves
	 * @param userConfig The state of the user for the specific reserve
	 * @param reserves The addresses of all the active reserves
	 * @param oracle The price oracle
	 */

	function validateBorrow(
		address asset,
		DataTypes.ReserveData storage reserve,
		address userAddress,
		uint256 amount,
		uint256 amountInETH,
		uint256 interestRateMode,
		uint256 maxStableLoanPercent,
		mapping(address => DataTypes.ReserveData) storage reservesData,
		DataTypes.UserConfigurationMap storage userConfig,
		mapping(uint256 => address) storage reserves,
		uint256 reservesCount,
		address oracle
	) external view {
		ValidateBorrowLocalVars memory vars;

		(vars.isActive, vars.isFrozen, vars.borrowingEnabled, vars.stableRateBorrowingEnabled) = reserve
			.configuration
			.getFlags();

		require(vars.isActive, Errors.VL_NO_ACTIVE_RESERVE);
		require(!vars.isFrozen, Errors.VL_RESERVE_FROZEN);
		require(amount != 0, Errors.VL_INVALID_AMOUNT);

		require(vars.borrowingEnabled, Errors.VL_BORROWING_NOT_ENABLED);

		//validate interest rate mode
		require(
			uint256(DataTypes.InterestRateMode.VARIABLE) == interestRateMode ||
				uint256(DataTypes.InterestRateMode.STABLE) == interestRateMode,
			Errors.VL_INVALID_INTEREST_RATE_MODE_SELECTED
		);

		(
			vars.userCollateralBalanceETH,
			vars.userBorrowBalanceETH,
			vars.currentLtv,
			vars.currentLiquidationThreshold,
			vars.healthFactor
		) = GenericLogic.calculateUserAccountData(
			userAddress,
			reservesData,
			userConfig,
			reserves,
			reservesCount,
			oracle
		);

		require(vars.userCollateralBalanceETH > 0, Errors.VL_COLLATERAL_BALANCE_IS_0);

		require(
			vars.healthFactor > GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD,
			Errors.VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD
		);

		//add the current already borrowed amount to the amount requested to calculate the total collateral needed.
		vars.amountOfCollateralNeededETH = vars.userBorrowBalanceETH.add(amountInETH).percentDiv(vars.currentLtv); //LTV is calculated in percentage

		require(
			vars.amountOfCollateralNeededETH <= vars.userCollateralBalanceETH,
			Errors.VL_COLLATERAL_CANNOT_COVER_NEW_BORROW
		);

		/**
		 * Following conditions need to be met if the user is borrowing at a stable rate:
		 * 1. Reserve must be enabled for stable rate borrowing
		 * 2. Users cannot borrow from the reserve if their collateral is (mostly) the same currency
		 *    they are borrowing, to prevent abuses.
		 * 3. Users will be able to borrow only a portion of the total available liquidity
		 **/

		if (interestRateMode == uint256(DataTypes.InterestRateMode.STABLE)) {
			//check if the borrow mode is stable and if stable rate borrowing is enabled on this reserve

			require(vars.stableRateBorrowingEnabled, Errors.VL_STABLE_BORROWING_NOT_ENABLED);

			require(
				!userConfig.isUsingAsCollateral(reserve.id) ||
					reserve.configuration.getLtv() == 0 ||
					amount > IERC20(reserve.aTokenAddress).balanceOf(userAddress),
				Errors.VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY
			);

			vars.availableLiquidity = IERC20(asset).balanceOf(reserve.aTokenAddress);

			//calculate the max available loan size in stable rate mode as a percentage of the
			//available liquidity
			uint256 maxLoanSizeStable = vars.availableLiquidity.percentMul(maxStableLoanPercent);

			require(amount <= maxLoanSizeStable, Errors.VL_AMOUNT_BIGGER_THAN_MAX_LOAN_SIZE_STABLE);
		}
	}

	/**
	 * @dev Validates a repay action
	 * @param reserve The reserve state from which the user is repaying
	 * @param amountSent The amount sent for the repayment. Can be an actual value or uint256(-1)
	 * @param onBehalfOf The address of the user msg.sender is repaying for
	 * @param stableDebt The borrow balance of the user
	 * @param variableDebt The borrow balance of the user
	 */
	function validateRepay(
		DataTypes.ReserveData storage reserve,
		uint256 amountSent,
		DataTypes.InterestRateMode rateMode,
		address onBehalfOf,
		uint256 stableDebt,
		uint256 variableDebt
	) external view {
		bool isActive = reserve.configuration.getActive();

		require(isActive, Errors.VL_NO_ACTIVE_RESERVE);

		require(amountSent > 0, Errors.VL_INVALID_AMOUNT);

		require(
			(stableDebt > 0 && DataTypes.InterestRateMode(rateMode) == DataTypes.InterestRateMode.STABLE) ||
				(variableDebt > 0 && DataTypes.InterestRateMode(rateMode) == DataTypes.InterestRateMode.VARIABLE),
			Errors.VL_NO_DEBT_OF_SELECTED_TYPE
		);

		require(
			amountSent != type(uint256).max || msg.sender == onBehalfOf,
			Errors.VL_NO_EXPLICIT_AMOUNT_TO_REPAY_ON_BEHALF
		);
	}

	/**
	 * @dev Validates a swap of borrow rate mode.
	 * @param reserve The reserve state on which the user is swapping the rate
	 * @param userConfig The user reserves configuration
	 * @param stableDebt The stable debt of the user
	 * @param variableDebt The variable debt of the user
	 * @param currentRateMode The rate mode of the borrow
	 */
	function validateSwapRateMode(
		DataTypes.ReserveData storage reserve,
		DataTypes.UserConfigurationMap storage userConfig,
		uint256 stableDebt,
		uint256 variableDebt,
		DataTypes.InterestRateMode currentRateMode
	) external view {
		(bool isActive, bool isFrozen, , bool stableRateEnabled) = reserve.configuration.getFlags();

		require(isActive, Errors.VL_NO_ACTIVE_RESERVE);
		require(!isFrozen, Errors.VL_RESERVE_FROZEN);

		if (currentRateMode == DataTypes.InterestRateMode.STABLE) {
			require(stableDebt > 0, Errors.VL_NO_STABLE_RATE_LOAN_IN_RESERVE);
		} else if (currentRateMode == DataTypes.InterestRateMode.VARIABLE) {
			require(variableDebt > 0, Errors.VL_NO_VARIABLE_RATE_LOAN_IN_RESERVE);
			/**
			 * user wants to swap to stable, before swapping we need to ensure that
			 * 1. stable borrow rate is enabled on the reserve
			 * 2. user is not trying to abuse the reserve by depositing
			 * more collateral than he is borrowing, artificially lowering
			 * the interest rate, borrowing at variable, and switching to stable
			 **/
			require(stableRateEnabled, Errors.VL_STABLE_BORROWING_NOT_ENABLED);

			require(
				!userConfig.isUsingAsCollateral(reserve.id) ||
					reserve.configuration.getLtv() == 0 ||
					stableDebt.add(variableDebt) > IERC20(reserve.aTokenAddress).balanceOf(msg.sender),
				Errors.VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY
			);
		} else {
			revert(Errors.VL_INVALID_INTEREST_RATE_MODE_SELECTED);
		}
	}

	/**
	 * @dev Validates a stable borrow rate rebalance action
	 * @param reserve The reserve state on which the user is getting rebalanced
	 * @param reserveAddress The address of the reserve
	 * @param stableDebtToken The stable debt token instance
	 * @param variableDebtToken The variable debt token instance
	 * @param aTokenAddress The address of the aToken contract
	 */
	function validateRebalanceStableBorrowRate(
		DataTypes.ReserveData storage reserve,
		address reserveAddress,
		IERC20 stableDebtToken,
		IERC20 variableDebtToken,
		address aTokenAddress
	) external view {
		(bool isActive, , , ) = reserve.configuration.getFlags();

		require(isActive, Errors.VL_NO_ACTIVE_RESERVE);

		//if the usage ratio is below 95%, no rebalances are needed
		uint256 totalDebt = stableDebtToken.totalSupply().add(variableDebtToken.totalSupply()).wadToRay();
		uint256 availableLiquidity = IERC20(reserveAddress).balanceOf(aTokenAddress).wadToRay();
		uint256 usageRatio = totalDebt == 0 ? 0 : totalDebt.rayDiv(availableLiquidity.add(totalDebt));

		//if the liquidity rate is below REBALANCE_UP_THRESHOLD of the max variable APR at 95% usage,
		//then we allow rebalancing of the stable rate positions.

		uint256 currentLiquidityRate = reserve.currentLiquidityRate;
		uint256 maxVariableBorrowRate = IReserveInterestRateStrategy(reserve.interestRateStrategyAddress)
			.getMaxVariableBorrowRate();

		require(
			usageRatio >= REBALANCE_UP_USAGE_RATIO_THRESHOLD &&
				currentLiquidityRate <= maxVariableBorrowRate.percentMul(REBALANCE_UP_LIQUIDITY_RATE_THRESHOLD),
			Errors.LP_INTEREST_RATE_REBALANCE_CONDITIONS_NOT_MET
		);
	}

	/**
	 * @dev Validates the action of setting an asset as collateral
	 * @param reserve The state of the reserve that the user is enabling or disabling as collateral
	 * @param reserveAddress The address of the reserve
	 * @param reservesData The data of all the reserves
	 * @param userConfig The state of the user for the specific reserve
	 * @param reserves The addresses of all the active reserves
	 * @param oracle The price oracle
	 */
	function validateSetUseReserveAsCollateral(
		DataTypes.ReserveData storage reserve,
		address reserveAddress,
		bool useAsCollateral,
		mapping(address => DataTypes.ReserveData) storage reservesData,
		DataTypes.UserConfigurationMap storage userConfig,
		mapping(uint256 => address) storage reserves,
		uint256 reservesCount,
		address oracle
	) external view {
		uint256 underlyingBalance = IERC20(reserve.aTokenAddress).balanceOf(msg.sender);

		require(underlyingBalance > 0, Errors.VL_UNDERLYING_BALANCE_NOT_GREATER_THAN_0);

		require(
			useAsCollateral ||
				GenericLogic.balanceDecreaseAllowed(
					reserveAddress,
					msg.sender,
					underlyingBalance,
					reservesData,
					userConfig,
					reserves,
					reservesCount,
					oracle
				),
			Errors.VL_DEPOSIT_ALREADY_IN_USE
		);
	}

	/**
	 * @dev Validates a flashloan action
	 * @param assets The assets being flashborrowed
	 * @param amounts The amounts for each asset being borrowed
	 **/
	function validateFlashloan(address[] memory assets, uint256[] memory amounts) internal pure {
		require(assets.length == amounts.length, Errors.VL_INCONSISTENT_FLASHLOAN_PARAMS);
	}

	/**
	 * @dev Validates the liquidation action
	 * @param collateralReserve The reserve data of the collateral
	 * @param principalReserve The reserve data of the principal
	 * @param userConfig The user configuration
	 * @param userHealthFactor The user's health factor
	 * @param userStableDebt Total stable debt balance of the user
	 * @param userVariableDebt Total variable debt balance of the user
	 **/
	function validateLiquidationCall(
		DataTypes.ReserveData storage collateralReserve,
		DataTypes.ReserveData storage principalReserve,
		DataTypes.UserConfigurationMap storage userConfig,
		uint256 userHealthFactor,
		uint256 userStableDebt,
		uint256 userVariableDebt
	) internal view returns (uint256, string memory) {
		if (!collateralReserve.configuration.getActive() || !principalReserve.configuration.getActive()) {
			return (uint256(Errors.CollateralManagerErrors.NO_ACTIVE_RESERVE), Errors.VL_NO_ACTIVE_RESERVE);
		}

		if (userHealthFactor >= GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD) {
			return (
				uint256(Errors.CollateralManagerErrors.HEALTH_FACTOR_ABOVE_THRESHOLD),
				Errors.LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD
			);
		}

		bool isCollateralEnabled = collateralReserve.configuration.getLiquidationThreshold() > 0 &&
			userConfig.isUsingAsCollateral(collateralReserve.id);

		//if collateral isn't enabled as collateral by user, it cannot be liquidated
		if (!isCollateralEnabled) {
			return (
				uint256(Errors.CollateralManagerErrors.COLLATERAL_CANNOT_BE_LIQUIDATED),
				Errors.LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED
			);
		}

		if (userStableDebt == 0 && userVariableDebt == 0) {
			return (
				uint256(Errors.CollateralManagerErrors.CURRRENCY_NOT_BORROWED),
				Errors.LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER
			);
		}

		return (uint256(Errors.CollateralManagerErrors.NO_ERROR), Errors.LPCM_NO_ERRORS);
	}

	/**
	 * @dev Validates an aToken transfer
	 * @param from The user from which the aTokens are being transferred
	 * @param reservesData The state of all the reserves
	 * @param userConfig The state of the user for the specific reserve
	 * @param reserves The addresses of all the active reserves
	 * @param oracle The price oracle
	 */
	function validateTransfer(
		address from,
		mapping(address => DataTypes.ReserveData) storage reservesData,
		DataTypes.UserConfigurationMap storage userConfig,
		mapping(uint256 => address) storage reserves,
		uint256 reservesCount,
		address oracle
	) internal view {
		(, , , , uint256 healthFactor) = GenericLogic.calculateUserAccountData(
			from,
			reservesData,
			userConfig,
			reserves,
			reservesCount,
			oracle
		);

		require(healthFactor >= GenericLogic.HEALTH_FACTOR_LIQUIDATION_THRESHOLD, Errors.VL_TRANSFER_NOT_ALLOWED);
	}
}

// File: contracts/lending/libraries/math/MathUtils.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import {WadRayMath} from "./WadRayMath.sol";

library MathUtils {
	using SafeMath for uint256;
	using WadRayMath for uint256;

	/// @dev Ignoring leap years
	uint256 internal constant SECONDS_PER_YEAR = 365 days;

	/**
	 * @dev Function to calculate the interest accumulated using a linear interest rate formula
	 * @param rate The interest rate, in ray
	 * @param lastUpdateTimestamp The timestamp of the last update of the interest
	 * @return The interest rate linearly accumulated during the timeDelta, in ray
	 **/

	function calculateLinearInterest(uint256 rate, uint40 lastUpdateTimestamp) internal view returns (uint256) {
		//solium-disable-next-line
		uint256 timeDifference = block.timestamp.sub(uint256(lastUpdateTimestamp));

		return (rate.mul(timeDifference) / SECONDS_PER_YEAR).add(WadRayMath.ray());
	}

	/**
	 * @dev Function to calculate the interest using a compounded interest rate formula
	 * To avoid expensive exponentiation, the calculation is performed using a binomial approximation:
	 *
	 *  (1+x)^n = 1+n*x+[n/2*(n-1)]*x^2+[n/6*(n-1)*(n-2)*x^3...
	 *
	 * The approximation slightly underpays liquidity providers and undercharges borrowers, with the advantage of great gas cost reductions
	 * The whitepaper contains reference to the approximation and a table showing the margin of error per different time periods
	 *
	 * @param rate The interest rate, in ray
	 * @param lastUpdateTimestamp The timestamp of the last update of the interest
	 * @return The interest rate compounded during the timeDelta, in ray
	 **/
	function calculateCompoundedInterest(
		uint256 rate,
		uint40 lastUpdateTimestamp,
		uint256 currentTimestamp
	) internal pure returns (uint256) {
		//solium-disable-next-line
		uint256 exp = currentTimestamp.sub(uint256(lastUpdateTimestamp));

		if (exp == 0) {
			return WadRayMath.ray();
		}

		uint256 expMinusOne = exp - 1;

		uint256 expMinusTwo = exp > 2 ? exp - 2 : 0;

		uint256 ratePerSecond = rate / SECONDS_PER_YEAR;

		uint256 basePowerTwo = ratePerSecond.rayMul(ratePerSecond);
		uint256 basePowerThree = basePowerTwo.rayMul(ratePerSecond);

		uint256 secondTerm = exp.mul(expMinusOne).mul(basePowerTwo) / 2;
		uint256 thirdTerm = exp.mul(expMinusOne).mul(expMinusTwo).mul(basePowerThree) / 6;

		return WadRayMath.ray().add(ratePerSecond.mul(exp)).add(secondTerm).add(thirdTerm);
	}

	/**
	 * @dev Calculates the compounded interest between the timestamp of the last update and the current block timestamp
	 * @param rate The interest rate (in ray)
	 * @param lastUpdateTimestamp The timestamp from which the interest accumulation needs to be calculated
	 **/
	function calculateCompoundedInterest(uint256 rate, uint40 lastUpdateTimestamp) internal view returns (uint256) {
		return calculateCompoundedInterest(rate, lastUpdateTimestamp, block.timestamp);
	}
}

// File: contracts/lending/libraries/math/PercentageMath.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import {Errors} from "../helpers/Errors.sol";

/**
 * @title PercentageMath library
 * @author Aave
 * @notice Provides functions to perform percentage calculations
 * @dev Percentages are defined by default with 2 decimals of precision (100.00). The precision is indicated by PERCENTAGE_FACTOR
 * @dev Operations are rounded half up
 **/

library PercentageMath {
	uint256 constant PERCENTAGE_FACTOR = 1e4; //percentage plus two decimals
	uint256 constant HALF_PERCENT = PERCENTAGE_FACTOR / 2;

	/**
	 * @dev Executes a percentage multiplication
	 * @param value The value of which the percentage needs to be calculated
	 * @param percentage The percentage of the value to be calculated
	 * @return The percentage of value
	 **/
	function percentMul(uint256 value, uint256 percentage) internal pure returns (uint256) {
		if (value == 0 || percentage == 0) {
			return 0;
		}

		require(value <= (type(uint256).max - HALF_PERCENT) / percentage, Errors.MATH_MULTIPLICATION_OVERFLOW);

		return (value * percentage + HALF_PERCENT) / PERCENTAGE_FACTOR;
	}

	/**
	 * @dev Executes a percentage division
	 * @param value The value of which the percentage needs to be calculated
	 * @param percentage The percentage of the value to be calculated
	 * @return The value divided the percentage
	 **/
	function percentDiv(uint256 value, uint256 percentage) internal pure returns (uint256) {
		require(percentage != 0, Errors.MATH_DIVISION_BY_ZERO);
		uint256 halfPercentage = percentage / 2;

		require(value <= (type(uint256).max - halfPercentage) / PERCENTAGE_FACTOR, Errors.MATH_MULTIPLICATION_OVERFLOW);

		return (value * PERCENTAGE_FACTOR + halfPercentage) / percentage;
	}
}

// File: contracts/lending/libraries/math/WadRayMath.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

import {Errors} from "../helpers/Errors.sol";

/**
 * @title WadRayMath library
 * @author Aave
 * @dev Provides mul and div function for wads (decimal numbers with 18 digits precision) and rays (decimals with 27 digits)
 **/

library WadRayMath {
	uint256 internal constant WAD = 1e18;
	uint256 internal constant halfWAD = WAD / 2;

	uint256 internal constant RAY = 1e27;
	uint256 internal constant halfRAY = RAY / 2;

	uint256 internal constant WAD_RAY_RATIO = 1e9;

	/**
	 * @return One ray, 1e27
	 **/
	function ray() internal pure returns (uint256) {
		return RAY;
	}

	/**
	 * @return One wad, 1e18
	 **/

	function wad() internal pure returns (uint256) {
		return WAD;
	}

	/**
	 * @return Half ray, 1e27/2
	 **/
	function halfRay() internal pure returns (uint256) {
		return halfRAY;
	}

	/**
	 * @return Half ray, 1e18/2
	 **/
	function halfWad() internal pure returns (uint256) {
		return halfWAD;
	}

	/**
	 * @dev Multiplies two wad, rounding half up to the nearest wad
	 * @param a Wad
	 * @param b Wad
	 * @return The result of a*b, in wad
	 **/
	function wadMul(uint256 a, uint256 b) internal pure returns (uint256) {
		if (a == 0 || b == 0) {
			return 0;
		}

		require(a <= (type(uint256).max - halfWAD) / b, Errors.MATH_MULTIPLICATION_OVERFLOW);

		return (a * b + halfWAD) / WAD;
	}

	/**
	 * @dev Divides two wad, rounding half up to the nearest wad
	 * @param a Wad
	 * @param b Wad
	 * @return The result of a/b, in wad
	 **/
	function wadDiv(uint256 a, uint256 b) internal pure returns (uint256) {
		require(b != 0, Errors.MATH_DIVISION_BY_ZERO);
		uint256 halfB = b / 2;

		require(a <= (type(uint256).max - halfB) / WAD, Errors.MATH_MULTIPLICATION_OVERFLOW);

		return (a * WAD + halfB) / b;
	}

	/**
	 * @dev Multiplies two ray, rounding half up to the nearest ray
	 * @param a Ray
	 * @param b Ray
	 * @return The result of a*b, in ray
	 **/
	function rayMul(uint256 a, uint256 b) internal pure returns (uint256) {
		if (a == 0 || b == 0) {
			return 0;
		}

		require(a <= (type(uint256).max - halfRAY) / b, Errors.MATH_MULTIPLICATION_OVERFLOW);

		return (a * b + halfRAY) / RAY;
	}

	/**
	 * @dev Divides two ray, rounding half up to the nearest ray
	 * @param a Ray
	 * @param b Ray
	 * @return The result of a/b, in ray
	 **/
	function rayDiv(uint256 a, uint256 b) internal pure returns (uint256) {
		require(b != 0, Errors.MATH_DIVISION_BY_ZERO);
		uint256 halfB = b / 2;

		require(a <= (type(uint256).max - halfB) / RAY, Errors.MATH_MULTIPLICATION_OVERFLOW);

		return (a * RAY + halfB) / b;
	}

	/**
	 * @dev Casts ray down to wad
	 * @param a Ray
	 * @return a casted to wad, rounded half up to the nearest wad
	 **/
	function rayToWad(uint256 a) internal pure returns (uint256) {
		uint256 halfRatio = WAD_RAY_RATIO / 2;
		uint256 result = halfRatio + a;
		require(result >= halfRatio, Errors.MATH_ADDITION_OVERFLOW);

		return result / WAD_RAY_RATIO;
	}

	/**
	 * @dev Converts wad up to ray
	 * @param a Wad
	 * @return a converted in ray
	 **/
	function wadToRay(uint256 a) internal pure returns (uint256) {
		uint256 result = a * WAD_RAY_RATIO;
		require(result / WAD_RAY_RATIO == a, Errors.MATH_MULTIPLICATION_OVERFLOW);
		return result;
	}
}

// File: contracts/lending/libraries/types/DataTypes.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.8.12;

library DataTypes {
	// refer to the whitepaper, section 1.1 basic concepts for a formal description of these properties.
	struct ReserveData {
		//stores the reserve configuration
		ReserveConfigurationMap configuration;
		//the liquidity index. Expressed in ray
		uint128 liquidityIndex;
		//variable borrow index. Expressed in ray
		uint128 variableBorrowIndex;
		//the current supply rate. Expressed in ray
		uint128 currentLiquidityRate;
		//the current variable borrow rate. Expressed in ray
		uint128 currentVariableBorrowRate;
		//the current stable borrow rate. Expressed in ray
		uint128 currentStableBorrowRate;
		uint40 lastUpdateTimestamp;
		//tokens addresses
		address aTokenAddress;
		address stableDebtTokenAddress;
		address variableDebtTokenAddress;
		//address of the interest rate strategy
		address interestRateStrategyAddress;
		//the id of the reserve. Represents the position in the list of the active reserves
		uint8 id;
	}

	struct ReserveConfigurationMap {
		//bit 0-15: LTV
		//bit 16-31: Liq. threshold
		//bit 32-47: Liq. bonus
		//bit 48-55: Decimals
		//bit 56: Reserve is active
		//bit 57: reserve is frozen
		//bit 58: borrowing is enabled
		//bit 59: stable rate borrowing enabled
		//bit 60-63: reserved
		//bit 64-79: reserve factor
		uint256 data;
	}

	struct UserConfigurationMap {
		uint256 data;
	}

	enum InterestRateMode {
		NONE,
		STABLE,
		VARIABLE
	}
}