// File: contracts/dependencies/openzeppelin/contracts/Address.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
  /**
   * @dev Returns true if `account` is a contract.
   *
   * [IMPORTANT]
   * ====
   * It is unsafe to assume that an address for which this function returns
   * false is an externally-owned account (EOA) and not a contract.
   *
   * Among others, `isContract` will return false for the following
   * types of addresses:
   *
   *  - an externally-owned account
   *  - a contract in construction
   *  - an address where a contract will be created
   *  - an address where a contract lived, but was destroyed
   * ====
   */
  function isContract(address account) internal view returns (bool) {
    // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
    // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
    // for accounts without code, i.e. `keccak256('')`
    bytes32 codehash;
    bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
    // solhint-disable-next-line no-inline-assembly
    assembly {
      codehash := extcodehash(account)
    }
    return (codehash != accountHash && codehash != 0x0);
  }

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

    // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
    (bool success, ) = recipient.call{value: amount}('');
    require(success, 'Address: unable to send value, recipient may have reverted');
  }
}

// File: contracts/dependencies/openzeppelin/contracts/IERC20.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// File: contracts/dependencies/openzeppelin/contracts/IERC20Detailed.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

import {IERC20} from './IERC20.sol';

interface IERC20Detailed is IERC20 {
  function name() external view returns (string memory);

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

  function decimals() external view returns (uint8);
}

// File: contracts/dependencies/openzeppelin/contracts/Math.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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

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

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

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

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

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

      // Handle non-overflow cases, 256 by 256 division.
      if (prod1 == 0) {
        // Solidity will revert if denominator == 0, unlike the div opcode on its own.
        // The surrounding unchecked block does not change this fact.
        // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
        return prod0 / denominator;
      }

      // Make sure the result is less than 2^256. Also prevents denominator == 0.
      require(denominator > prod1, 'Math: mulDiv overflow');

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

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

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

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

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

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

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

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

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

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

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

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

// File: contracts/dependencies/openzeppelin/contracts/ReentrancyGuard.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

  uint256 private _status;

  constructor() {
    _status = _NOT_ENTERED;
  }

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

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

    _;

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

// File: contracts/dependencies/openzeppelin/contracts/SafeERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import {IERC20} from './IERC20.sol';
import {Address} from './Address.sol';

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

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

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

  function safeApprove(
    IERC20 token,
    address spender,
    uint256 value
  ) internal {
    require(
      (value == 0) || (token.allowance(address(this), spender) == 0),
      'SafeERC20: approve from non-zero to non-zero allowance'
    );
    callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
  }

  function callOptionalReturn(IERC20 token, bytes memory data) private {
    require(address(token).isContract(), 'SafeERC20: call to non-contract');

    // solhint-disable-next-line avoid-low-level-calls
    (bool success, bytes memory returndata) = address(token).call(data);
    require(success, 'SafeERC20: low-level call failed');

    if (returndata.length != 0) {
      // Return data is optional
      // solhint-disable-next-line max-line-length
      require(abi.decode(returndata, (bool)), 'SafeERC20: ERC20 operation did not succeed');
    }
  }
}

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



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

/**
 * @title IFlashLoanReceiver interface
 * @notice Interface for the IFlashLoanReceiver.
 * @author Sturdy
 * @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);
}

// File: contracts/flashloan/interfaces/IFlashLoanRecipient.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

import {IERC20} from '../../dependencies/openzeppelin/contracts/IERC20.sol';

/**
 * @title IFlashLoanRecipient interface
 * @notice Interface for the IFlashLoanRecipient.
 * @author Sturdy
 * @dev implement this interface to develop a flashloan-compatible IFlashLoanRecipient contract
 **/
interface IFlashLoanRecipient {
  /**
   * @dev When `flashLoan` is called on the Vault, it invokes the `receiveFlashLoan` hook on the recipient.
   *
   * At the time of the call, the Vault will have transferred `amounts` for `tokens` to the recipient. Before this
   * call returns, the recipient must have transferred `amounts` plus `feeAmounts` for each token back to the
   * Vault, or else the entire flash loan will revert.
   *
   * `userData` is the same value passed in the `IVault.flashLoan` call.
   */
  function receiveFlashLoan(
    IERC20[] memory tokens,
    uint256[] memory amounts,
    uint256[] memory feeAmounts,
    bytes memory userData
  ) external;
}

// File: contracts/interfaces/IAaveFlashLoan.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma abicoder v2;

interface IAaveFlashLoan {
  /**
   * @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;
}

// File: contracts/interfaces/IAToken.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

import {IERC20} from '../dependencies/openzeppelin/contracts/IERC20.sol';
import {IScaledBalanceToken} from './IScaledBalanceToken.sol';
import {IInitializableAToken} from './IInitializableAToken.sol';
import {ISturdyIncentivesController} from './ISturdyIncentivesController.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 payable 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 payable;

  /**
   * @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 payable;

  /**
   * @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 payable;

  /**
   * @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 payable 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 (ISturdyIncentivesController);

  /**
   * @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/IBalancerVault.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;
import {IERC20} from '../dependencies/openzeppelin/contracts/IERC20.sol';

interface IBalancerVault {
  // Pools
  //
  // There are three specialization settings for Pools, which allow for cheaper swaps at the cost of reduced
  // functionality:
  //
  //  - General: no specialization, suited for all Pools. IGeneralPool is used for swap request callbacks, passing the
  // balance of all tokens in the Pool. These Pools have the largest swap costs (because of the extra storage reads),
  // which increase with the number of registered tokens.
  //
  //  - Minimal Swap Info: IMinimalSwapInfoPool is used instead of IGeneralPool, which saves gas by only passing the
  // balance of the two tokens involved in the swap. This is suitable for some pricing algorithms, like the weighted
  // constant product one popularized by Balancer V1. Swap costs are smaller compared to general Pools, and are
  // independent of the number of registered tokens.
  //
  //  - Two Token: only allows two tokens to be registered. This achieves the lowest possible swap gas cost. Like
  // minimal swap info Pools, these are called via IMinimalSwapInfoPool.

  enum PoolSpecialization {
    GENERAL,
    MINIMAL_SWAP_INFO,
    TWO_TOKEN
  }

  /**
   * @dev Returns a Pool's contract address and specialization setting.
   */
  function getPool(bytes32 poolId) external view returns (address, PoolSpecialization);

  // Swaps
  //
  // Users can swap tokens with Pools by calling the `swap` and `batchSwap` functions. To do this,
  // they need not trust Pool contracts in any way: all security checks are made by the Vault. They must however be
  // aware of the Pools' pricing algorithms in order to estimate the prices Pools will quote.
  //
  // The `swap` function executes a single swap, while `batchSwap` can perform multiple swaps in sequence.
  // In each individual swap, tokens of one kind are sent from the sender to the Pool (this is the 'token in'),
  // and tokens of another kind are sent from the Pool to the recipient in exchange (this is the 'token out').
  // More complex swaps, such as one token in to multiple tokens out can be achieved by batching together
  // individual swaps.
  //
  // There are two swap kinds:
  //  - 'given in' swaps, where the amount of tokens in (sent to the Pool) is known, and the Pool determines (via the
  // `onSwap` hook) the amount of tokens out (to send to the recipient).
  //  - 'given out' swaps, where the amount of tokens out (received from the Pool) is known, and the Pool determines
  // (via the `onSwap` hook) the amount of tokens in (to receive from the sender).
  //
  // Additionally, it is possible to chain swaps using a placeholder input amount, which the Vault replaces with
  // the calculated output of the previous swap. If the previous swap was 'given in', this will be the calculated
  // tokenOut amount. If the previous swap was 'given out', it will use the calculated tokenIn amount. These extended
  // swaps are known as 'multihop' swaps, since they 'hop' through a number of intermediate tokens before arriving at
  // the final intended token.
  //
  // In all cases, tokens are only transferred in and out of the Vault (or withdrawn from and deposited into Internal
  // Balance) after all individual swaps have been completed, and the net token balance change computed. This makes
  // certain swap patterns, such as multihops, or swaps that interact with the same token pair in multiple Pools, cost
  // much less gas than they would otherwise.
  //
  // It also means that under certain conditions it is possible to perform arbitrage by swapping with multiple
  // Pools in a way that results in net token movement out of the Vault (profit), with no tokens being sent in (only
  // updating the Pool's internal accounting).
  //
  // To protect users from front-running or the market changing rapidly, they supply a list of 'limits' for each token
  // involved in the swap, where either the maximum number of tokens to send (by passing a positive value) or the
  // minimum amount of tokens to receive (by passing a negative value) is specified.
  //
  // Additionally, a 'deadline' timestamp can also be provided, forcing the swap to fail if it occurs after
  // this point in time (e.g. if the transaction failed to be included in a block promptly).
  //
  // If interacting with Pools that hold WETH, it is possible to both send and receive ETH directly: the Vault will do
  // the wrapping and unwrapping. To enable this mechanism, the IAsset sentinel value (the zero address) must be
  // passed in the `assets` array instead of the WETH address. Note that it is possible to combine ETH and WETH in the
  // same swap. Any excess ETH will be sent back to the caller (not the sender, which is relevant for relayers).
  //
  // Finally, Internal Balance can be used when either sending or receiving tokens.

  enum SwapKind {
    GIVEN_IN,
    GIVEN_OUT
  }

  /**
   * @dev Performs a swap with a single Pool.
   *
   * If the swap is 'given in' (the number of tokens to send to the Pool is known), it returns the amount of tokens
   * taken from the Pool, which must be greater than or equal to `limit`.
   *
   * If the swap is 'given out' (the number of tokens to take from the Pool is known), it returns the amount of tokens
   * sent to the Pool, which must be less than or equal to `limit`.
   *
   * Internal Balance usage and the recipient are determined by the `funds` struct.
   *
   * Emits a `Swap` event.
   */
  function swap(
    SingleSwap memory singleSwap,
    FundManagement memory funds,
    uint256 limit,
    uint256 deadline
  ) external payable returns (uint256);

  /**
   * @dev Data for a single swap executed by `swap`. `amount` is either `amountIn` or `amountOut` depending on
   * the `kind` value.
   *
   * `assetIn` and `assetOut` are either token addresses, or the IAsset sentinel value for ETH (the zero address).
   * Note that Pools never interact with ETH directly: it will be wrapped to or unwrapped from WETH by the Vault.
   *
   * The `userData` field is ignored by the Vault, but forwarded to the Pool in the `onSwap` hook, and may be
   * used to extend swap behavior.
   */
  struct SingleSwap {
    bytes32 poolId;
    SwapKind kind;
    address assetIn;
    address assetOut;
    uint256 amount;
    bytes userData;
  }

  /**
   * @dev All tokens in a swap are either sent from the `sender` account to the Vault, or from the Vault to the
   * `recipient` account.
   *
   * If the caller is not `sender`, it must be an authorized relayer for them.
   *
   * If `fromInternalBalance` is true, the `sender`'s Internal Balance will be preferred, performing an ERC20
   * transfer for the difference between the requested amount and the User's Internal Balance (if any). The `sender`
   * must have allowed the Vault to use their tokens via `IERC20.approve()`. This matches the behavior of
   * `joinPool`.
   *
   * If `toInternalBalance` is true, tokens will be deposited to `recipient`'s internal balance instead of
   * transferred. This matches the behavior of `exitPool`.
   *
   * Note that ETH cannot be deposited to or withdrawn from Internal Balance: attempting to do so will trigger a
   * revert.
   */
  struct FundManagement {
    address sender;
    bool fromInternalBalance;
    address payable recipient;
    bool toInternalBalance;
  }

  /**
   * @dev Called by users to exit a Pool, which transfers tokens from the Pool's balance to `recipient`. This will
   * trigger custom Pool behavior, which will typically ask for something in return from `sender` - often tokenized
   * Pool shares. The amount of tokens that can be withdrawn is limited by the Pool's `cash` balance (see
   * `getPoolTokenInfo`).
   *
   * If the caller is not `sender`, it must be an authorized relayer for them.
   *
   * The `tokens` and `minAmountsOut` arrays must have the same length, and each entry in these indicates the minimum
   * token amount to receive for each token contract. The amounts to send are decided by the Pool and not the Vault:
   * it just enforces these minimums.
   *
   * If exiting a Pool that holds WETH, it is possible to receive ETH directly: the Vault will do the unwrapping. To
   * enable this mechanism, the IAsset sentinel value (the zero address) must be passed in the `assets` array instead
   * of the WETH address. Note that it is not possible to combine ETH and WETH in the same exit.
   *
   * `assets` must have the same length and order as the array returned by `getPoolTokens`. This prevents issues when
   * interacting with Pools that register and deregister tokens frequently. If receiving ETH however, the array must
   * be sorted *before* replacing the WETH address with the ETH sentinel value (the zero address), which means the
   * final `assets` array might not be sorted. Pools with no registered tokens cannot be exited.
   *
   * If `toInternalBalance` is true, the tokens will be deposited to `recipient`'s Internal Balance. Otherwise,
   * an ERC20 transfer will be performed. Note that ETH cannot be deposited to Internal Balance: attempting to
   * do so will trigger a revert.
   *
   * `minAmountsOut` is the minimum amount of tokens the user expects to get out of the Pool, for each token in the
   * `tokens` array. This array must match the Pool's registered tokens.
   *
   * This causes the Vault to call the `IBasePool.onExitPool` hook on the Pool's contract, where Pools implement
   * their own custom logic. This typically requires additional information from the user (such as the expected number
   * of Pool shares to return). This can be encoded in the `userData` argument, which is ignored by the Vault and
   * passed directly to the Pool's contract.
   *
   * Emits a `PoolBalanceChanged` event.
   */
  function exitPool(
    bytes32 poolId,
    address sender,
    address payable recipient,
    ExitPoolRequest memory request
  ) external;

  struct ExitPoolRequest {
    address[] assets;
    uint256[] minAmountsOut;
    bytes userData;
    bool toInternalBalance;
  }

  enum ExitKind {
    EXACT_BPT_IN_FOR_ONE_TOKEN_OUT,
    EXACT_BPT_IN_FOR_TOKENS_OUT,
    BPT_IN_FOR_EXACT_TOKENS_OUT
  }

  function joinPool(
    bytes32 poolId,
    address sender,
    address recipient,
    JoinPoolRequest memory request
  ) external payable;

  struct JoinPoolRequest {
    address[] assets;
    uint256[] maxAmountsIn;
    bytes userData;
    bool fromInternalBalance;
  }

  enum JoinKind {
    INIT,
    EXACT_TOKENS_IN_FOR_BPT_OUT,
    TOKEN_IN_FOR_EXACT_BPT_OUT
  }

  function getPoolTokenInfo(
    bytes32 poolId,
    IERC20 token
  )
    external
    view
    returns (uint256 cash, uint256 managed, uint256 lastChangeBlock, address assetManager);

  function getPoolTokens(
    bytes32 poolId
  )
    external
    view
    returns (address[] memory tokens, uint256[] memory balances, uint256 lastChangeBlock);

  struct BatchSwapStep {
    bytes32 poolId;
    uint256 assetInIndex;
    uint256 assetOutIndex;
    uint256 amount;
    bytes userData;
  }

  function batchSwap(
    SwapKind kind,
    BatchSwapStep[] memory swaps,
    address[] memory assets,
    FundManagement memory funds,
    int256[] memory limits,
    uint256 deadline
  ) external payable returns (int256[] memory);

  function flashLoan(
    address recipient,
    IERC20[] memory tokens,
    uint256[] memory amounts,
    bytes memory userData
  ) external;
}

// File: contracts/interfaces/ICurveAddressProvider.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

/**
 * @title ICurveAddressProvider interface
 * @notice Interface for the Curve Address Provider.
 **/

interface ICurveAddressProvider {
  function get_address(uint256 id) external view returns (address);
}

// File: contracts/interfaces/ICurveExchange.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

interface ICurveExchange {
  function exchange(
    address _pool,
    address _from,
    address _to,
    uint256 _amount,
    uint256 _expected,
    address _receiver
  ) external payable returns (uint256);

  function exchange_multiple(
    address[9] memory _route,
    uint256[3][4] memory _swap_params,
    uint256 _amount,
    uint256 _expected,
    address[4] memory _pools,
    address _receiver
  ) external payable returns (uint256);
}

// File: contracts/interfaces/ICurvePool.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

interface ICurvePool {
  function get_virtual_price() external view returns (uint256 price);

  function coins(uint256) external view returns (address);

  function coins(int128) external view returns (address);

  function balances(int128 _id) external view returns (uint256);

  function balances(uint256 _id) external view returns (uint256);

  function calc_withdraw_one_coin(
    uint256 _burn_amount,
    int128 i,
    bool _previous
  ) external view returns (uint256);

  function calc_withdraw_one_coin(uint256 _burn_amount, int128 i) external view returns (uint256);

  function calc_token_amount(
    uint256[2] memory _amounts,
    bool _is_deposit
  ) external view returns (uint256);

  function calc_token_amount(
    uint256[3] memory _amounts,
    bool _is_deposit
  ) external view returns (uint256);

  function calc_token_amount(
    uint256[4] memory _amounts,
    bool _is_deposit
  ) external view returns (uint256);

  function remove_liquidity_one_coin(
    uint256 _burn_amount,
    int128 i,
    uint256 _min_amount,
    address _receiver
  ) external returns (uint256);

  function remove_liquidity_one_coin(
    uint256 _burn_amount,
    int128 i,
    uint256 _min_amount
  ) external returns (uint256);

  function remove_liquidity_one_coin(
    uint256 _burn_amount,
    int128 i,
    uint256 _min_amount,
    bool _use_underlying
  ) external returns (uint256);

  function remove_liquidity_imbalance(
    uint256[4] calldata amounts,
    uint256 max_burn_amount
  ) external;

  /**
   * @dev Index values can be found via the `coins` public getter method
   * @param i Index value for the coin to send
   * @param j Index valie of the coin to recieve
   * @param dx Amount of `i` being exchanged
   * @param min_dy Minimum amount of `j` to receive
   * @return Actual amount of `j` received
   **/
  function exchange(
    int128 i,
    int128 j,
    uint256 dx,
    uint256 min_dy
  ) external payable returns (uint256);

  function get_dy(int128 i, int128 j, uint256 dx) external view returns (uint256);

  function get_dy_underlying(int128 i, int128 j, uint256 dx) external view returns (uint256);

  function add_liquidity(uint256[4] memory amounts, uint256 _min_mint_amount) external;

  function add_liquidity(uint256[2] memory amounts, uint256 _min_mint_amount) external;
}

// File: contracts/interfaces/IGeneralLevSwap.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

import {CurveswapAdapter} from '../protocol/libraries/swap/CurveswapAdapter.sol';

interface IGeneralLevSwap {
  enum FlashLoanType {
    AAVE,
    BALANCER
  }

  enum SwapType {
    NONE,
    NO_SWAP,
    UNISWAP,
    BALANCER,
    CURVE
  }

  struct MultipSwapPath {
    address[9] routes;
    uint256[3][4] routeParams;
    // uniswap/balancer/curve
    SwapType swapType;
    uint256 poolCount;
    address swapFrom;
    address swapTo;
    uint256 inAmount;
    uint256 outAmount;
  }

  struct SwapInfo {
    MultipSwapPath[3] paths;
    MultipSwapPath[3] reversePaths;
    uint256 pathLength;
  }

  struct FlashLoanParams {
    bool isEnterPosition;
    uint256 minCollateralAmount;
    address user;
    address sAsset;
    SwapInfo swapInfo;
  }

  struct LeverageParams {
    address user;
    uint256 principal;
    uint256 leverage;
    address borrowAsset;
    FlashLoanType flashLoanType;
    SwapInfo swapInfo;
  }

  function enterPositionWithFlashloan(
    uint256 _principal,
    uint256 _leverage,
    address _stableAsset,
    FlashLoanType _flashLoanType,
    SwapInfo calldata _swapInfo
  ) external;

  function withdrawWithFlashloan(
    uint256 _repayAmount,
    uint256 _requiredAmount,
    address _stableAsset,
    address _sAsset,
    FlashLoanType _flashLoanType,
    SwapInfo calldata _swapInfo
  ) external;

  function zapDeposit(
    address _zappingAsset,
    uint256 _principal,
    MultipSwapPath[3] calldata _zapPaths,
    uint256 _zapPathLength
  ) external;

  function zapLeverageWithFlashloan(
    address _zappingAsset,
    uint256 _principal,
    uint256 _leverage,
    address _borrowAsset,
    FlashLoanType _flashLoanType,
    MultipSwapPath[3] calldata _zapPaths,
    uint256 _zapPathLength,
    SwapInfo calldata _swapInfo
  ) external;

  function getAvailableBorrowAssets() external pure returns (address[] memory);
}

// File: contracts/interfaces/IGeneralVault.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

interface IGeneralVault {
  function pricePerShare() external view returns (uint256);

  function vaultYieldInPrice() external view returns (uint256);

  function withdrawOnLiquidation(address _asset, uint256 _amount) external returns (uint256);

  function convertOnLiquidation(address _assetOut, uint256 _amountIn) external;

  function processYield() external;

  function getYieldAmount() external view returns (uint256);

  function setTreasuryInfo(address _treasury, uint256 _fee) external;

  function depositCollateral(address _asset, uint256 _amount) external payable;

  function depositCollateralFrom(address _asset, uint256 _amount, address _user) external payable;

  function withdrawCollateral(
    address _asset,
    uint256 _amount,
    uint256 _slippage,
    address _to
  ) external;
}

// File: contracts/interfaces/IInitializableAToken.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

import {ILendingPool} from './ILendingPool.sol';
import {ISturdyIncentivesController} from './ISturdyIncentivesController.sol';

/**
 * @title IInitializableAToken
 * @notice Interface for the initialize function on AToken
 * @author Sturdy, inspiration from 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 Sturdy 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,
    ISturdyIncentivesController incentivesController,
    uint8 aTokenDecimals,
    string calldata aTokenName,
    string calldata aTokenSymbol,
    bytes calldata params
  ) external;
}

// File: contracts/interfaces/ILendingPool.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma abicoder v2;

import {ILendingPoolAddressesProvider} from './ILendingPoolAddressesProvider.sol';
import {DataTypes} from '../protocol/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 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 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
  );

  /**
   * @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
   * - Caller is anyone.
   * @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;

  /**
   * @dev Deposits an `amount` of underlying asset into the reserve for supplier from vault
   * - Caller is only Vault which is registered in this contract
   * @param asset The address of the underlying asset to deposit
   * @param amount The amount to be deposited
   **/
  function depositYield(address asset, uint256 amount) external;

  /**
   * @dev Grab an Yield `amount` of underlying asset into the vault
   * - Caller is only Vault which is registered in this contract
   * @param asset The address of the underlying asset to get yield
   * @param amount The yield amount
   **/
  function getYield(address asset, uint256 amount) external;

  /**
   * @dev Get underlying asset and aToken's total balance
   * @param asset The address of the underlying asset
   **/
  function getTotalBalanceOfAssetPair(address asset) external view returns (uint256, uint256);

  /**
   * @dev Get total underlying asset which is borrowable
   *  and also list of underlying asset
   **/
  function getBorrowingAssetAndVolumes()
    external
    view
    returns (uint256, uint256[] memory, address[] memory, uint256);

  /**
   * @dev Register the vault address
   * - To check if the caller is vault for some functions
   * - Caller is only LendingPoolConfigurator
   * @param _vaultAddress The address of the Vault
   **/
  function registerVault(address _vaultAddress) external payable;

  /**
   * @dev Unregister the vault address
   * - To check if the caller is vault for some functions
   * - Caller is only LendingPoolConfigurator
   * @param _vaultAddress The address of the Vault
   **/
  function unregisterVault(address _vaultAddress) external payable;

  /**
   * @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
   * - Caller is anyone
   * @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 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
   * - Caller is anyone
   * @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 from The address of user who is depositor of underlying asset
   * @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 withdrawFrom(
    address asset,
    uint256 amount,
    address from,
    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`
   * - Caller is anyone
   * @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
   * - Caller is anyone
   * @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 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
   * - Caller is anyone
   * @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 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
    );

  /**
   * @dev Initializes a reserve, activating it, assigning an aToken and debt tokens and an
   * interest rate strategy
   * - Only callable by the LendingPoolConfigurator contract
   * - Caller is only LendingPoolConfigurator
   * @param reserve The address of the underlying asset of the reserve
   * @param yieldAddress The address of the underlying asset's yield contract 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 variableDebtAddress 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 reserve,
    address yieldAddress,
    address aTokenAddress,
    address stableDebtAddress,
    address variableDebtAddress,
    address interestRateStrategyAddress
  ) external payable;

  /**
   * @dev Updates the address of the interest rate strategy contract
   * - Caller is only LendingPoolConfigurator
   * @param reserve The address of the underlying asset of the reserve
   * @param rateStrategyAddress The address of the interest rate strategy contract
   **/
  function setReserveInterestRateStrategyAddress(
    address reserve,
    address rateStrategyAddress
  ) external payable;

  /**
   * @dev Sets the configuration bitmap of the reserve as a whole
   * - Caller is only LendingPoolConfigurator
   * @param reserve The address of the underlying asset of the reserve
   * @param configuration The new configuration bitmap
   **/
  function setConfiguration(address reserve, uint256 configuration) external payable;

  /**
   * @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);

  /**
   * @dev Validates and finalizes an aToken transfer
   * - Only callable by the overlying aToken of the `asset`
   * - Caller is only aToken contract which is storing the underlying asset of depositors
   * @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 balanceFromAfter 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 balanceFromAfter,
    uint256 balanceToBefore
  ) external;

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

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

  /**
   * @dev Set the _pause state of a reserve
   * - Caller is only LendingPoolConfigurator
   * @param val `true` to pause the reserve, `false` to un-pause it
   */
  function setPause(bool val) external payable;

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

// File: contracts/interfaces/ILendingPoolAddressesProvider.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

/**
 * @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 Sturdy Governance
 * @author Sturdy, inspiration from Aave
 **/
interface ILendingPoolAddressesProvider {
  event MarketIdSet(string newMarketId);
  event LendingPoolUpdated(address indexed newAddress);
  event IncentiveControllerUpdated(address indexed newAddress);
  event IncentiveTokenUpdated(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 payable;

  function setAddress(bytes32 id, address newAddress) external payable;

  function setAddressAsProxy(bytes32 id, address impl) external payable;

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

  function getLendingPool() external view returns (address);

  function setLendingPoolImpl(address pool) external payable;

  function getIncentiveController() external view returns (address);

  function setIncentiveControllerImpl(address incentiveController) external payable;

  function getIncentiveToken() external view returns (address);

  function setIncentiveTokenImpl(address incentiveToken) external payable;

  function getLendingPoolConfigurator() external view returns (address);

  function setLendingPoolConfiguratorImpl(address configurator) external payable;

  function getLendingPoolCollateralManager() external view returns (address);

  function setLendingPoolCollateralManager(address manager) external payable;

  function getPoolAdmin() external view returns (address);

  function setPoolAdmin(address admin) external payable;

  function getEmergencyAdmin() external view returns (address);

  function setEmergencyAdmin(address admin) external payable;

  function getPriceOracle() external view returns (address);

  function setPriceOracle(address priceOracle) external payable;

  function getLendingRateOracle() external view returns (address);

  function setLendingRateOracle(address lendingRateOracle) external payable;
}

// File: contracts/interfaces/IPriceOracleGetter.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

/**
 * @title IPriceOracleGetter interface
 * @notice Interface for the Sturdy 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/IScaledBalanceToken.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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/ISturdyIncentivesController.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma abicoder v2;

interface ISturdyIncentivesController {
  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 payable;

  /**
   * @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 payable;

  /**
   * @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 handleAction(address user, uint256 totalSupply, uint256 userBalance) 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/ISwapRouter.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;
pragma abicoder v2;

import './IUniswapV3SwapCallback.sol';

/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface ISwapRouter is IUniswapV3SwapCallback {
  struct ExactInputSingleParams {
    address tokenIn;
    address tokenOut;
    uint24 fee;
    address recipient;
    uint256 deadline;
    uint256 amountIn;
    uint256 amountOutMinimum;
    uint160 sqrtPriceLimitX96;
  }

  /// @notice Swaps `amountIn` of one token for as much as possible of another token
  /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
  /// @return amountOut The amount of the received token
  function exactInputSingle(ExactInputSingleParams calldata params)
    external
    payable
    returns (uint256 amountOut);

  struct ExactInputParams {
    bytes path;
    address recipient;
    uint256 deadline;
    uint256 amountIn;
    uint256 amountOutMinimum;
  }

  /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
  /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
  /// @return amountOut The amount of the received token
  function exactInput(ExactInputParams calldata params)
    external
    payable
    returns (uint256 amountOut);

  struct ExactOutputSingleParams {
    address tokenIn;
    address tokenOut;
    uint24 fee;
    address recipient;
    uint256 deadline;
    uint256 amountOut;
    uint256 amountInMaximum;
    uint160 sqrtPriceLimitX96;
  }

  /// @notice Swaps as little as possible of one token for `amountOut` of another token
  /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
  /// @return amountIn The amount of the input token
  function exactOutputSingle(ExactOutputSingleParams calldata params)
    external
    payable
    returns (uint256 amountIn);

  struct ExactOutputParams {
    bytes path;
    address recipient;
    uint256 deadline;
    uint256 amountOut;
    uint256 amountInMaximum;
  }

  /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
  /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
  /// @return amountIn The amount of the input token
  function exactOutput(ExactOutputParams calldata params)
    external
    payable
    returns (uint256 amountIn);
}

// File: contracts/interfaces/IUniswapV3SwapCallback.sol



// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
  /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
  /// @dev In the implementation you must pay the pool tokens owed for the swap.
  /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
  /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
  /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
  /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
  /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
  /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
  /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
  function uniswapV3SwapCallback(
    int256 amount0Delta,
    int256 amount1Delta,
    bytes calldata data
  ) external;
}

// File: contracts/interfaces/IVaultWhitelist.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

interface IVaultWhitelist {
  function whitelistUser(address vault, address user) external view returns (bool);

  function whitelistUserCount(address vault) external view returns (uint256);

  function whitelistContract(address vault, address sender) external view returns (bool);
}

// File: contracts/protocol/leverage/ethereum/TUSDFRAXBPLevSwap.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import {GeneralLevSwap} from '../GeneralLevSwap.sol';
import {IERC20} from '../../../dependencies/openzeppelin/contracts/IERC20.sol';
import {IGeneralLevSwap} from '../../../interfaces/IGeneralLevSwap.sol';
import {ICurvePool} from '../../../interfaces/ICurvePool.sol';
import {SafeERC20} from '../../../dependencies/openzeppelin/contracts/SafeERC20.sol';
import {Errors} from '../../libraries/helpers/Errors.sol';

contract TUSDFRAXBPLevSwap is GeneralLevSwap {
  using SafeERC20 for IERC20;

  address private constant TUSDFRAXBP = 0x33baeDa08b8afACc4d3d07cf31d49FC1F1f3E893;
  address private constant DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
  address private constant USDC = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
  address private constant USDT = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
  address private constant FRAXUSDCLP = 0x3175Df0976dFA876431C2E9eE6Bc45b65d3473CC;

  constructor(
    address _asset,
    address _vault,
    address _provider
  ) GeneralLevSwap(_asset, _vault, _provider) {
    ENABLED_BORROW_ASSETS[DAI] = true;
    ENABLED_BORROW_ASSETS[USDC] = true;
    ENABLED_BORROW_ASSETS[USDT] = true;
  }

  function getAvailableBorrowAssets() external pure override returns (address[] memory assets) {
    assets = new address[](3);
    assets[0] = DAI;
    assets[1] = USDC;
    assets[2] = USDT;
  }

  // TUSDFRAXBP <-> borrowing asset
  function _processSwap(
    uint256 _amount,
    IGeneralLevSwap.MultipSwapPath memory _path,
    bool _isFrom,
    bool _checkOutAmount
  ) internal override returns (uint256) {
    if (_path.swapType > IGeneralLevSwap.SwapType.NO_SWAP) {
      return _swapByPath(_amount, _path, _checkOutAmount);
    }

    uint256 outAmount = _checkOutAmount ? _path.outAmount : 0;
    if (_isFrom) {
      // TUSDFRAXBP -> FRAXUSDC/TUSD
      int256 coinIndex;

      if (_path.swapTo == FRAXUSDCLP) {
        coinIndex = 1;
      }

      return
        ICurvePool(TUSDFRAXBP).remove_liquidity_one_coin(_amount, int128(coinIndex), outAmount);
    }

    // FRAXUSDC/TUSD -> TUSDFRAXBP
    require(_path.swapTo == COLLATERAL, Errors.LS_INVALID_CONFIGURATION);

    uint256[2] memory amountsAdded;
    uint256 coinIndex;
    address from = _path.swapFrom;

    IERC20(from).safeApprove(TUSDFRAXBP, 0);
    IERC20(from).safeApprove(TUSDFRAXBP, _amount);

    if (from == FRAXUSDCLP) {
      coinIndex = 1;
    }
    amountsAdded[coinIndex] = _amount;

    ICurvePool(TUSDFRAXBP).add_liquidity(amountsAdded, outAmount);
    return IERC20(COLLATERAL).balanceOf(address(this));
  }
}

// File: contracts/protocol/leverage/GeneralLevSwap.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma abicoder v2;

import {IERC20} from '../../dependencies/openzeppelin/contracts/IERC20.sol';
import {IERC20Detailed} from '../../dependencies/openzeppelin/contracts/IERC20Detailed.sol';
import {SafeERC20} from '../../dependencies/openzeppelin/contracts/SafeERC20.sol';
import {ReentrancyGuard} from '../../dependencies/openzeppelin/contracts/ReentrancyGuard.sol';
import {IPriceOracleGetter} from '../../interfaces/IPriceOracleGetter.sol';
import {ILendingPool} from '../../interfaces/ILendingPool.sol';
import {ILendingPoolAddressesProvider} from '../../interfaces/ILendingPoolAddressesProvider.sol';
import {PercentageMath} from '../libraries/math/PercentageMath.sol';
import {IGeneralVault} from '../../interfaces/IGeneralVault.sol';
import {IGeneralLevSwap} from '../../interfaces/IGeneralLevSwap.sol';
import {IAToken} from '../../interfaces/IAToken.sol';
import {IFlashLoanReceiver} from '../../flashloan/interfaces/IFlashLoanReceiver.sol';
import {IFlashLoanRecipient} from '../../flashloan/interfaces/IFlashLoanRecipient.sol';
import {IVaultWhitelist} from '../../interfaces/IVaultWhitelist.sol';
import {IAaveFlashLoan} from '../../interfaces/IAaveFlashLoan.sol';
import {IBalancerVault} from '../../interfaces/IBalancerVault.sol';
import {DataTypes} from '../libraries/types/DataTypes.sol';
import {ReserveConfiguration} from '../libraries/configuration/ReserveConfiguration.sol';
import {Math} from '../../dependencies/openzeppelin/contracts/Math.sol';
import {WadRayMath} from '../libraries/math/WadRayMath.sol';
import {Errors} from '../libraries/helpers/Errors.sol';
import {BalancerswapAdapter2} from '../libraries/swap/BalancerswapAdapter2.sol';
import {UniswapAdapter2} from '../libraries/swap/UniswapAdapter2.sol';
import {CurveswapAdapter2} from '../libraries/swap/CurveswapAdapter2.sol';

abstract contract GeneralLevSwap is IFlashLoanReceiver, IFlashLoanRecipient, ReentrancyGuard {
  using SafeERC20 for IERC20;
  using PercentageMath for uint256;
  using ReserveConfiguration for DataTypes.ReserveConfigurationMap;
  using WadRayMath for uint256;

  uint256 private constant USE_VARIABLE_DEBT = 2;

  address private constant AAVE_LENDING_POOL_ADDRESS = 0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2;

  address private constant BALANCER_VAULT = 0xBA12222222228d8Ba445958a75a0704d566BF2C8;

  IVaultWhitelist private constant VAULT_WHITELIST =
    IVaultWhitelist(0x88eE44794bAf865E3b0b192d1F9f0AC3Daf1EA0E);

  address public immutable COLLATERAL; // The address of external asset

  uint256 public immutable DECIMALS; // The collateral decimals

  address public immutable VAULT; // The address of vault

  ILendingPoolAddressesProvider internal immutable PROVIDER;

  IPriceOracleGetter internal immutable ORACLE;

  ILendingPool internal immutable LENDING_POOL;

  mapping(address => bool) internal ENABLED_BORROW_ASSETS;

  //1 == not inExec
  //2 == inExec;
  //setting default to 1 to save some gas.
  uint256 private _balancerFlashLoanLock = 1;

  /**
   * @param _asset The external asset ex. wFTM
   * @param _vault The deployed vault address
   * @param _provider The deployed AddressProvider
   */
  constructor(address _asset, address _vault, address _provider) {
    require(
      _asset != address(0) && _provider != address(0) && _vault != address(0),
      Errors.LS_INVALID_CONFIGURATION
    );

    COLLATERAL = _asset;
    DECIMALS = IERC20Detailed(_asset).decimals();
    VAULT = _vault;
    PROVIDER = ILendingPoolAddressesProvider(_provider);
    ORACLE = IPriceOracleGetter(PROVIDER.getPriceOracle());
    LENDING_POOL = ILendingPool(PROVIDER.getLendingPool());
    IERC20(COLLATERAL).approve(_vault, type(uint256).max);
  }

  /**
   * Get borrow coins available to borrow
   */
  function getAvailableBorrowAssets() external pure virtual returns (address[] memory) {
    return new address[](0);
  }

  /**
   * This function is called after your contract has received the flash loaned amount
   * overriding executeOperation() in IFlashLoanReceiver
   */
  function executeOperation(
    address[] calldata assets,
    uint256[] calldata amounts,
    uint256[] calldata premiums,
    address initiator,
    bytes calldata params
  ) external override returns (bool) {
    require(initiator == address(this), Errors.LS_INVALID_CONFIGURATION);
    require(msg.sender == AAVE_LENDING_POOL_ADDRESS, Errors.LS_INVALID_CONFIGURATION);
    require(assets.length == amounts.length, Errors.LS_INVALID_CONFIGURATION);
    require(assets.length == premiums.length, Errors.LS_INVALID_CONFIGURATION);
    require(amounts[0] != 0, Errors.LS_INVALID_CONFIGURATION);
    require(assets[0] != address(0), Errors.LS_INVALID_CONFIGURATION);

    _executeOperation(assets[0], amounts[0], premiums[0], params);

    // approve the Aave LendingPool contract allowance to *pull* the owed amount
    IERC20(assets[0]).safeApprove(AAVE_LENDING_POOL_ADDRESS, 0);
    IERC20(assets[0]).safeApprove(AAVE_LENDING_POOL_ADDRESS, amounts[0] + premiums[0]);

    return true;
  }

  /**
   * This function is called after your contract has received the flash loaned amount
   * overriding receiveFlashLoan() in IFlashLoanRecipient
   */
  function receiveFlashLoan(
    IERC20[] memory tokens,
    uint256[] memory amounts,
    uint256[] memory feeAmounts,
    bytes memory userData
  ) external override {
    require(msg.sender == BALANCER_VAULT, Errors.LS_INVALID_CONFIGURATION);
    require(_balancerFlashLoanLock == 2, Errors.LS_INVALID_CONFIGURATION);
    require(tokens.length == amounts.length, Errors.LS_INVALID_CONFIGURATION);
    require(tokens.length == feeAmounts.length, Errors.LS_INVALID_CONFIGURATION);
    require(amounts[0] != 0, Errors.LS_INVALID_CONFIGURATION);
    require(address(tokens[0]) != address(0), Errors.LS_INVALID_CONFIGURATION);
    _balancerFlashLoanLock = 1;

    _executeOperation(address(tokens[0]), amounts[0], feeAmounts[0], userData);

    // send tokens to Balancer vault contract
    IERC20(tokens[0]).safeTransfer(msg.sender, amounts[0] + feeAmounts[0]);
  }

  function _executeOperation(
    address asset,
    uint256 borrowAmount,
    uint256 fee,
    bytes memory params
  ) internal {
    // parse params
    IGeneralLevSwap.FlashLoanParams memory opsParams = abi.decode(
      params,
      (IGeneralLevSwap.FlashLoanParams)
    );
    require(opsParams.minCollateralAmount != 0, Errors.LS_INVALID_CONFIGURATION);
    require(opsParams.user != address(0), Errors.LS_INVALID_CONFIGURATION);

    if (opsParams.isEnterPosition) {
      _enterPositionWithFlashloan(asset, borrowAmount, fee, opsParams);
    } else {
      require(opsParams.sAsset != address(0), Errors.LS_INVALID_CONFIGURATION);
      _withdrawWithFlashloan(asset, borrowAmount, opsParams);
    }
  }

  /**
   * @param _principal - The amount of collateral
   * @param _leverage - Extra leverage value and must be greater than 0, ex. 300% = 300_00
   *                    _principal + _principal * _leverage should be used as collateral
   * @param _borrowAsset - The borrowing asset address when leverage works
   * @param _flashLoanType - 0 is Aave, 1 is Balancer
   * @param _swapInfo - The uniswap/balancer swap paths between borrowAsset and collateral
   */
  function enterPositionWithFlashloan(
    uint256 _principal,
    uint256 _leverage,
    address _borrowAsset,
    IGeneralLevSwap.FlashLoanType _flashLoanType,
    IGeneralLevSwap.SwapInfo calldata _swapInfo
  ) external nonReentrant {
    require(_principal != 0, Errors.LS_SWAP_AMOUNT_NOT_GT_0);
    require(_leverage != 0, Errors.LS_SWAP_AMOUNT_NOT_GT_0);
    require(_leverage < 900_00, Errors.LS_INVALID_CONFIGURATION);
    require(_borrowAsset != address(0), Errors.LS_INVALID_CONFIGURATION);
    require(ENABLED_BORROW_ASSETS[_borrowAsset], Errors.LS_STABLE_COIN_NOT_SUPPORTED);
    require(IERC20(COLLATERAL).balanceOf(msg.sender) >= _principal, Errors.LS_SUPPLY_NOT_ALLOWED);
    IERC20(COLLATERAL).safeTransferFrom(msg.sender, address(this), _principal);

    _leverageWithFlashloan(
      IGeneralLevSwap.LeverageParams(
        msg.sender,
        _principal,
        _leverage,
        _borrowAsset,
        _flashLoanType,
        _swapInfo
      )
    );
  }

  /**
   * @param _repayAmount - The amount of repay
   * @param _requiredAmount - The amount of collateral
   * @param _borrowAsset - The borrowing asset address when leverage works
   * @param _sAsset - staked asset address of collateral internal asset
   * @param _flashLoanType - 0 is Aave, 1 is Balancer
   * @param _swapInfo - The uniswap/balancer/curve swap infos between borrowAsset and collateral
   */
  function withdrawWithFlashloan(
    uint256 _repayAmount,
    uint256 _requiredAmount,
    address _borrowAsset,
    address _sAsset,
    IGeneralLevSwap.FlashLoanType _flashLoanType,
    IGeneralLevSwap.SwapInfo calldata _swapInfo
  ) external nonReentrant {
    require(_repayAmount != 0, Errors.LS_SWAP_AMOUNT_NOT_GT_0);
    require(_requiredAmount != 0, Errors.LS_SWAP_AMOUNT_NOT_GT_0);
    require(_borrowAsset != address(0), Errors.LS_INVALID_CONFIGURATION);
    require(ENABLED_BORROW_ASSETS[_borrowAsset], Errors.LS_STABLE_COIN_NOT_SUPPORTED);
    require(_sAsset != address(0), Errors.LS_INVALID_CONFIGURATION);
    require(
      _sAsset ==
        LENDING_POOL.getReserveData(IAToken(_sAsset).UNDERLYING_ASSET_ADDRESS()).aTokenAddress,
      Errors.LS_INVALID_CONFIGURATION
    );

    uint256[] memory amounts = new uint256[](1);
    amounts[0] = _repayAmount;

    bytes memory params = abi.encode(
      false /*leavePosition*/,
      _requiredAmount,
      msg.sender,
      _sAsset,
      _swapInfo
    );

    if (_flashLoanType == IGeneralLevSwap.FlashLoanType.AAVE) {
      // 0 means revert the transaction if not validated
      uint256[] memory modes = new uint256[](1);
      modes[0] = 0;

      address[] memory assets = new address[](1);
      assets[0] = _borrowAsset;
      IAaveFlashLoan(AAVE_LENDING_POOL_ADDRESS).flashLoan(
        address(this),
        assets,
        amounts,
        modes,
        address(this),
        params,
        0
      );
    } else {
      require(_balancerFlashLoanLock == 1, Errors.LS_INVALID_CONFIGURATION);
      IERC20[] memory assets = new IERC20[](1);
      assets[0] = IERC20(_borrowAsset);
      _balancerFlashLoanLock = 2;
      IBalancerVault(BALANCER_VAULT).flashLoan(address(this), assets, amounts, params);
    }

    // remained borrow asset -> collateral
    _swapTo(
      _borrowAsset,
      IERC20(_borrowAsset).balanceOf(address(this)),
      _swapInfo.paths,
      _swapInfo.pathLength,
      false
    );

    uint256 collateralAmount = IERC20(COLLATERAL).balanceOf(address(this));
    if (collateralAmount > _requiredAmount) {
      _supply(collateralAmount - _requiredAmount, msg.sender);
      collateralAmount = _requiredAmount;
    }

    // finally deliver the collateral to user
    IERC20(COLLATERAL).safeTransfer(msg.sender, collateralAmount);
  }

  function _enterPositionWithFlashloan(
    address _borrowAsset,
    uint256 _borrowedAmount,
    uint256 _fee,
    IGeneralLevSwap.FlashLoanParams memory _params
  ) internal {
    //swap borrow asset to collateral
    _swapTo(
      _borrowAsset,
      _borrowedAmount,
      _params.swapInfo.paths,
      _params.swapInfo.pathLength,
      true
    );

    uint256 collateralAmount = IERC20(COLLATERAL).balanceOf(address(this));
    require(collateralAmount >= _params.minCollateralAmount, Errors.LS_SUPPLY_FAILED);

    //deposit collateral
    _supply(collateralAmount, _params.user);

    //borrow
    _borrow(_borrowAsset, _borrowedAmount + _fee, _params.user);
  }

  function _withdrawWithFlashloan(
    address _borrowAsset,
    uint256 _borrowedAmount,
    IGeneralLevSwap.FlashLoanParams memory _params
  ) internal {
    // repay
    _repay(_borrowAsset, _borrowedAmount, _params.user);

    // withdraw collateral
    // get internal asset address
    address internalAsset = IAToken(_params.sAsset).UNDERLYING_ASSET_ADDRESS();
    // get reserve info of internal asset
    DataTypes.ReserveConfigurationMap memory configuration = LENDING_POOL.getConfiguration(
      internalAsset
    );
    (, uint256 assetLiquidationThreshold, , , ) = configuration.getParamsMemory();
    require(assetLiquidationThreshold != 0, Errors.LS_INVALID_CONFIGURATION);
    // get user info
    (
      uint256 totalCollateralETH,
      uint256 totalDebtETH,
      ,
      uint256 currentLiquidationThreshold,
      ,

    ) = LENDING_POOL.getUserAccountData(_params.user);

    uint256 withdrawalAmountETH = (((totalCollateralETH * currentLiquidationThreshold) /
      PercentageMath.PERCENTAGE_FACTOR -
      totalDebtETH) * PercentageMath.PERCENTAGE_FACTOR) / assetLiquidationThreshold;

    uint256 withdrawalAmount = Math.min(
      IERC20(_params.sAsset).balanceOf(_params.user),
      (withdrawalAmountETH * (10 ** DECIMALS)) / ORACLE.getAssetPrice(COLLATERAL)
    );

    require(withdrawalAmount >= _params.minCollateralAmount, Errors.LS_SUPPLY_NOT_ALLOWED);

    IERC20(_params.sAsset).safeTransferFrom(_params.user, address(this), withdrawalAmount);
    _remove(withdrawalAmount, 0, _params.user);

    // collateral -> borrow asset
    _swapFrom(_borrowAsset, _params.swapInfo.reversePaths, _params.swapInfo.pathLength);
  }

  function _supply(uint256 _amount, address _user) internal {
    // whitelist checking
    if (VAULT_WHITELIST.whitelistUserCount(VAULT) != 0) {
      require(VAULT_WHITELIST.whitelistUser(VAULT, _user), Errors.CALLER_NOT_WHITELIST_USER);
    }

    IERC20(COLLATERAL).safeApprove(VAULT, 0);
    IERC20(COLLATERAL).safeApprove(VAULT, _amount);
    IGeneralVault(VAULT).depositCollateralFrom(COLLATERAL, _amount, _user);
  }

  function _remove(uint256 _amount, uint256 _slippage, address _user) internal {
    // whitelist checking
    if (VAULT_WHITELIST.whitelistUserCount(VAULT) != 0) {
      require(VAULT_WHITELIST.whitelistUser(VAULT, _user), Errors.CALLER_NOT_WHITELIST_USER);
    }

    IGeneralVault(VAULT).withdrawCollateral(COLLATERAL, _amount, _slippage, address(this));
  }

  function _borrow(address _borrowAsset, uint256 _amount, address borrower) internal {
    LENDING_POOL.borrow(_borrowAsset, _amount, USE_VARIABLE_DEBT, 0, borrower);
  }

  function _repay(address _borrowAsset, uint256 _amount, address borrower) internal {
    IERC20(_borrowAsset).safeApprove(address(LENDING_POOL), 0);
    IERC20(_borrowAsset).safeApprove(address(LENDING_POOL), _amount);

    uint256 paybackAmount = LENDING_POOL.repay(_borrowAsset, _amount, USE_VARIABLE_DEBT, borrower);
    require(paybackAmount != 0, Errors.LS_REPAY_FAILED);
  }

  /**
   * @param _zappingAsset - The stable coin address which will zap into lp token
   * @param _principal - The amount of collateral
   * @param _zapPaths - The uniswap/balancer/curve swap paths between zappingAsset and collateral
   * @param _zapPathLength - The uniswap/balancer/curve swap path length between zappingAsset and collateral
   */
  function zapDeposit(
    address _zappingAsset,
    uint256 _principal,
    IGeneralLevSwap.MultipSwapPath[3] calldata _zapPaths,
    uint256 _zapPathLength
  ) external nonReentrant {
    require(_principal != 0, Errors.LS_SWAP_AMOUNT_NOT_GT_0);
    require(_zappingAsset != address(0), Errors.LS_INVALID_CONFIGURATION);
    require(ENABLED_BORROW_ASSETS[_zappingAsset], Errors.LS_STABLE_COIN_NOT_SUPPORTED);
    require(
      IERC20(_zappingAsset).balanceOf(msg.sender) >= _principal,
      Errors.LS_SUPPLY_NOT_ALLOWED
    );

    IERC20(_zappingAsset).safeTransferFrom(msg.sender, address(this), _principal);

    uint256 suppliedAmount = _swapTo(_zappingAsset, _principal, _zapPaths, _zapPathLength, true);
    // supply to LP
    _supply(suppliedAmount, msg.sender);
  }

  /**
   * @param _zappingAsset - The stable coin address which will zap into lp token
   * @param _principal - The amount of the stable coin
   * @param _leverage - Extra leverage value and must be greater than 0, ex. 300% = 300_00
   *                    principal + principal * leverage should be used as collateral
   * @param _borrowAsset - The borrowing asset address when leverage works
   * @param _flashLoanType - 0 is Aave, 1 is Balancer
   * @param _zapPaths - The uniswap/balancer/curve swap paths between zappingAsset and collateral
   * @param _zapPathLength - The uniswap/balancer/curve swap path length between zappingAsset and collateral
   * @param _swapInfo - The uniswap/balancer/curve swap between borrowAsset and collateral
   */
  function zapLeverageWithFlashloan(
    address _zappingAsset,
    uint256 _principal,
    uint256 _leverage,
    address _borrowAsset,
    IGeneralLevSwap.FlashLoanType _flashLoanType,
    IGeneralLevSwap.MultipSwapPath[3] calldata _zapPaths,
    uint256 _zapPathLength,
    IGeneralLevSwap.SwapInfo calldata _swapInfo
  ) external nonReentrant {
    require(_principal != 0, Errors.LS_SWAP_AMOUNT_NOT_GT_0);
    require(_leverage != 0, Errors.LS_SWAP_AMOUNT_NOT_GT_0);
    require(_leverage < 900_00, Errors.LS_INVALID_CONFIGURATION);
    require(_borrowAsset != address(0), Errors.LS_INVALID_CONFIGURATION);
    require(_zappingAsset != address(0), Errors.LS_INVALID_CONFIGURATION);
    require(ENABLED_BORROW_ASSETS[_zappingAsset], Errors.LS_STABLE_COIN_NOT_SUPPORTED);
    require(ENABLED_BORROW_ASSETS[_borrowAsset], Errors.LS_STABLE_COIN_NOT_SUPPORTED);
    require(
      IERC20(_zappingAsset).balanceOf(msg.sender) >= _principal,
      Errors.LS_SUPPLY_NOT_ALLOWED
    );

    IERC20(_zappingAsset).safeTransferFrom(msg.sender, address(this), _principal);

    uint256 collateralAmount = _swapTo(_zappingAsset, _principal, _zapPaths, _zapPathLength, true);

    _leverageWithFlashloan(
      IGeneralLevSwap.LeverageParams(
        msg.sender,
        collateralAmount,
        _leverage,
        _borrowAsset,
        _flashLoanType,
        _swapInfo
      )
    );
  }

  function _leverageWithFlashloan(IGeneralLevSwap.LeverageParams memory _params) internal {
    uint256 minCollateralAmount = _params.principal.percentMul(
      PercentageMath.PERCENTAGE_FACTOR + _params.leverage
    );

    bytes memory params = abi.encode(
      true /*enterPosition*/,
      minCollateralAmount,
      _params.user,
      address(0),
      _params.swapInfo
    );

    uint256 borrowAssetDecimals = IERC20Detailed(_params.borrowAsset).decimals();
    uint256[] memory amounts = new uint256[](1);
    amounts[0] = _params.swapInfo.paths[0].inAmount;
    if (_params.flashLoanType == IGeneralLevSwap.FlashLoanType.AAVE) {
      // 0 means revert the transaction if not validated
      uint256[] memory modes = new uint256[](1);
      address[] memory assets = new address[](1);
      assets[0] = _params.borrowAsset;
      IAaveFlashLoan(AAVE_LENDING_POOL_ADDRESS).flashLoan(
        address(this),
        assets,
        amounts,
        modes,
        address(this),
        params,
        0
      );
    } else {
      require(_balancerFlashLoanLock == 1, Errors.LS_INVALID_CONFIGURATION);

      IERC20[] memory assets = new IERC20[](1);
      assets[0] = IERC20(_params.borrowAsset);
      _balancerFlashLoanLock = 2;
      IBalancerVault(BALANCER_VAULT).flashLoan(address(this), assets, amounts, params);
      _balancerFlashLoanLock = 1;
    }
  }

  function _swapTo(
    address _borrowingAsset,
    uint256 _amount,
    IGeneralLevSwap.MultipSwapPath[3] memory _paths,
    uint256 _pathLength,
    bool _checkOutAmount
  ) internal returns (uint256) {
    require(_pathLength > 0, Errors.LS_INVALID_CONFIGURATION);
    require(_paths[0].swapFrom == _borrowingAsset, Errors.LS_INVALID_CONFIGURATION);
    require(_paths[_pathLength - 1].swapTo == COLLATERAL, Errors.LS_INVALID_CONFIGURATION);

    uint256 amount = _amount;
    if (amount == 0) return 0;

    for (uint256 i; i < _pathLength; ++i) {
      if (_paths[i].swapType == IGeneralLevSwap.SwapType.NONE) continue;
      amount = _processSwap(amount, _paths[i], false, _checkOutAmount);
    }

    return amount;
  }

  function _swapFrom(
    address _borrowingAsset,
    IGeneralLevSwap.MultipSwapPath[3] memory _paths,
    uint256 _pathLength
  ) internal returns (uint256) {
    require(_pathLength > 0, Errors.LS_INVALID_CONFIGURATION);
    require(_paths[0].swapFrom == COLLATERAL, Errors.LS_INVALID_CONFIGURATION);
    require(_paths[_pathLength - 1].swapTo == _borrowingAsset, Errors.LS_INVALID_CONFIGURATION);

    uint256 amount = IERC20(COLLATERAL).balanceOf(address(this));
    if (amount == 0) return 0;

    for (uint256 i; i < _pathLength; ++i) {
      if (_paths[i].swapType == IGeneralLevSwap.SwapType.NONE) continue;
      amount = _processSwap(amount, _paths[i], true, true);
    }

    return amount;
  }

  function _swapByPath(
    uint256 _fromAmount,
    IGeneralLevSwap.MultipSwapPath memory _path,
    bool _checkOutAmount
  ) internal returns (uint256) {
    uint256 poolCount = _path.poolCount;
    uint256 outAmount = _checkOutAmount ? _path.outAmount : 0;
    require(poolCount > 0, Errors.LS_INVALID_CONFIGURATION);

    if (_path.swapType == IGeneralLevSwap.SwapType.BALANCER) {
      // Balancer Swap
      BalancerswapAdapter2.Path memory path;
      path.tokens = new address[](poolCount + 1);
      path.poolIds = new bytes32[](poolCount);

      for (uint256 i; i < poolCount; ++i) {
        path.tokens[i] = _path.routes[i * 2];
        path.poolIds[i] = bytes32(_path.routeParams[i][0]);
      }
      path.tokens[poolCount] = _path.routes[poolCount * 2];

      return
        BalancerswapAdapter2.swapExactTokensForTokens(
          _path.swapFrom,
          _path.swapTo,
          _fromAmount,
          path,
          outAmount
        );
    }

    if (_path.swapType == IGeneralLevSwap.SwapType.UNISWAP) {
      // UniSwap
      UniswapAdapter2.Path memory path;
      path.tokens = new address[](poolCount + 1);
      path.fees = new uint256[](poolCount);

      for (uint256 i; i < poolCount; ++i) {
        path.tokens[i] = _path.routes[i * 2];
        path.fees[i] = _path.routeParams[i][0];
      }
      path.tokens[poolCount] = _path.routes[poolCount * 2];

      return
        UniswapAdapter2.swapExactTokensForTokens(
          PROVIDER,
          _path.swapFrom,
          _path.swapTo,
          _fromAmount,
          path,
          outAmount
        );
    }

    // Curve Swap
    return
      CurveswapAdapter2.swapExactTokensForTokens(
        PROVIDER,
        _path.swapFrom,
        _path.swapTo,
        _fromAmount,
        CurveswapAdapter2.Path(_path.routes, _path.routeParams),
        outAmount
      );
  }

  function _processSwap(
    uint256,
    IGeneralLevSwap.MultipSwapPath memory,
    bool,
    bool
  ) internal virtual returns (uint256);
}

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



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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

/**
 * @title ReserveConfiguration library
 * @author Sturdy, inspiration from 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
  uint256 constant COLLATERAL_MASK =            0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFF; // 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 COLLATERAL_ENABLED_START_BIT_POSITION = 60;
  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 Sets the collateral state of the reserve
   * @param self The reserve configuration
   * @param enabled The collateral state
   **/
  function setCollateralEnabled(
    DataTypes.ReserveConfigurationMap memory self,
    bool enabled
  ) internal pure {
    self.data =
      (self.data & COLLATERAL_MASK) |
      (uint256(enabled ? 1 : 0) << COLLATERAL_ENABLED_START_BIT_POSITION);
  }

  /**
   * @dev Gets the collateral state of the reserve
   * @param self The reserve configuration
   * @return The collateral state
   **/
  function getCollateralEnabled(
    DataTypes.ReserveConfigurationMap storage self
  ) internal view returns (bool) {
    return (self.data & ~COLLATERAL_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, collateral enabled
   **/
  function getFlags(
    DataTypes.ReserveConfigurationMap storage self
  ) internal view returns (bool, 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,
      (dataLocal & ~COLLATERAL_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, collateral enabled
   **/
  function getFlagsMemory(
    DataTypes.ReserveConfigurationMap memory self
  ) internal pure returns (bool, 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,
      (self.data & ~COLLATERAL_MASK) != 0
    );
  }
}

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



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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

  //contract specific errors
  string internal constant VL_INVALID_AMOUNT = '1'; // 'Amount must be greater than 0'
  string internal constant VL_NO_ACTIVE_RESERVE = '2'; // 'Action requires an active reserve'
  string internal constant VL_RESERVE_FROZEN = '3'; // 'Action cannot be performed because the reserve is frozen'
  string internal constant VL_CURRENT_AVAILABLE_LIQUIDITY_NOT_ENOUGH = '4'; // 'The current liquidity is not enough'
  string internal constant VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE = '5'; // 'User cannot withdraw more than the available balance'
  string internal constant VL_TRANSFER_NOT_ALLOWED = '6'; // 'Transfer cannot be allowed.'
  string internal constant VL_BORROWING_NOT_ENABLED = '7'; // 'Borrowing is not enabled'
  string internal constant VL_INVALID_INTEREST_RATE_MODE_SELECTED = '8'; // 'Invalid interest rate mode selected'
  string internal constant VL_COLLATERAL_BALANCE_IS_0 = '9'; // 'The collateral balance is 0'
  string internal constant VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD = '10'; // 'Health factor is lesser than the liquidation threshold'
  string internal constant VL_COLLATERAL_CANNOT_COVER_NEW_BORROW = '11'; // 'There is not enough collateral to cover a new borrow'
  string internal constant VL_STABLE_BORROWING_NOT_ENABLED = '12'; // stable borrowing not enabled
  string internal constant VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY = '13'; // collateral is (mostly) the same currency that is being borrowed
  string internal 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 internal 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 internal 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 internal constant VL_NO_STABLE_RATE_LOAN_IN_RESERVE = '17'; // 'User does not have a stable rate loan in progress on this reserve'
  string internal constant VL_NO_VARIABLE_RATE_LOAN_IN_RESERVE = '18'; // 'User does not have a variable rate loan in progress on this reserve'
  string internal constant VL_UNDERLYING_BALANCE_NOT_GREATER_THAN_0 = '19'; // 'The underlying balance needs to be greater than 0'
  string internal constant VL_DEPOSIT_ALREADY_IN_USE = '20'; // 'User deposit is already being used as collateral'
  string internal constant LP_NOT_ENOUGH_STABLE_BORROW_BALANCE = '21'; // 'User does not have any stable rate loan for this reserve'
  string internal constant LP_INTEREST_RATE_REBALANCE_CONDITIONS_NOT_MET = '22'; // 'Interest rate rebalance conditions were not met'
  string internal constant LP_LIQUIDATION_CALL_FAILED = '23'; // 'Liquidation call failed'
  string internal constant LP_NOT_ENOUGH_LIQUIDITY_TO_BORROW = '24'; // 'There is not enough liquidity available to borrow'
  string internal constant LP_REQUESTED_AMOUNT_TOO_SMALL = '25'; // 'The requested amount is too small for a FlashLoan.'
  string internal constant LP_INCONSISTENT_PROTOCOL_ACTUAL_BALANCE = '26'; // 'The actual balance of the protocol is inconsistent'
  string internal constant LP_CALLER_NOT_LENDING_POOL_CONFIGURATOR = '27'; // 'The caller of the function is not the lending pool configurator'
  string internal constant LP_INCONSISTENT_FLASHLOAN_PARAMS = '28';
  string internal constant CT_CALLER_MUST_BE_LENDING_POOL = '29'; // 'The caller of this function must be a lending pool'
  string internal constant CT_CANNOT_GIVE_ALLOWANCE_TO_HIMSELF = '30'; // 'User cannot give allowance to himself'
  string internal constant CT_TRANSFER_AMOUNT_NOT_GT_0 = '31'; // 'Transferred amount needs to be greater than zero'
  string internal constant RL_RESERVE_ALREADY_INITIALIZED = '32'; // 'Reserve has already been initialized'
  string internal constant LPC_RESERVE_LIQUIDITY_NOT_0 = '34'; // 'The liquidity of the reserve needs to be 0'
  string internal constant LPC_INVALID_ATOKEN_POOL_ADDRESS = '35'; // 'The liquidity of the reserve needs to be 0'
  string internal constant LPC_INVALID_STABLE_DEBT_TOKEN_POOL_ADDRESS = '36'; // 'The liquidity of the reserve needs to be 0'
  string internal constant LPC_INVALID_VARIABLE_DEBT_TOKEN_POOL_ADDRESS = '37'; // 'The liquidity of the reserve needs to be 0'
  string internal constant LPC_INVALID_STABLE_DEBT_TOKEN_UNDERLYING_ADDRESS = '38'; // 'The liquidity of the reserve needs to be 0'
  string internal constant LPC_INVALID_VARIABLE_DEBT_TOKEN_UNDERLYING_ADDRESS = '39'; // 'The liquidity of the reserve needs to be 0'
  string internal constant LPC_INVALID_ADDRESSES_PROVIDER_ID = '40'; // 'The liquidity of the reserve needs to be 0'
  string internal constant LPC_INVALID_CONFIGURATION = '75'; // 'Invalid risk parameters for the reserve'
  string internal constant LPC_CALLER_NOT_EMERGENCY_ADMIN = '76'; // 'The caller must be the emergency admin'
  string internal constant LPAPR_PROVIDER_NOT_REGISTERED = '41'; // 'Provider is not registered'
  string internal constant LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD = '42'; // 'Health factor is not below the threshold'
  string internal constant LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED = '43'; // 'The collateral chosen cannot be liquidated'
  string internal constant LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER = '44'; // 'User did not borrow the specified currency'
  string internal constant LPCM_NOT_ENOUGH_LIQUIDITY_TO_LIQUIDATE = '45'; // "There isn't enough liquidity available to liquidate"
  string internal constant LPCM_NO_ERRORS = '46'; // 'No errors'
  string internal constant LP_INVALID_FLASHLOAN_MODE = '47'; //Invalid flashloan mode selected
  string internal constant MATH_MULTIPLICATION_OVERFLOW = '48';
  string internal constant MATH_ADDITION_OVERFLOW = '49';
  string internal constant MATH_DIVISION_BY_ZERO = '50';
  string internal constant RL_LIQUIDITY_INDEX_OVERFLOW = '51'; //  Liquidity index overflows uint128
  string internal constant RL_VARIABLE_BORROW_INDEX_OVERFLOW = '52'; //  Variable borrow index overflows uint128
  string internal constant RL_LIQUIDITY_RATE_OVERFLOW = '53'; //  Liquidity rate overflows uint128
  string internal constant RL_VARIABLE_BORROW_RATE_OVERFLOW = '54'; //  Variable borrow rate overflows uint128
  string internal constant RL_STABLE_BORROW_RATE_OVERFLOW = '55'; //  Stable borrow rate overflows uint128
  string internal constant CT_INVALID_MINT_AMOUNT = '56'; //invalid amount to mint
  string internal constant LP_FAILED_REPAY_WITH_COLLATERAL = '57';
  string internal constant CT_INVALID_BURN_AMOUNT = '58'; //invalid amount to burn
  string internal constant LP_FAILED_COLLATERAL_SWAP = '60';
  string internal constant LP_INVALID_EQUAL_ASSETS_TO_SWAP = '61';
  string internal constant LP_REENTRANCY_NOT_ALLOWED = '62';
  string internal constant LP_CALLER_MUST_BE_AN_ATOKEN = '63';
  string internal constant LP_IS_PAUSED = '64'; // 'Pool is paused'
  string internal constant LP_NO_MORE_RESERVES_ALLOWED = '65';
  string internal constant LP_INVALID_FLASH_LOAN_EXECUTOR_RETURN = '66';
  string internal constant RC_INVALID_LTV = '67';
  string internal constant RC_INVALID_LIQ_THRESHOLD = '68';
  string internal constant RC_INVALID_LIQ_BONUS = '69';
  string internal constant RC_INVALID_DECIMALS = '70';
  string internal constant RC_INVALID_RESERVE_FACTOR = '71';
  string internal constant LPAPR_INVALID_ADDRESSES_PROVIDER_ID = '72';
  string internal constant VL_INCONSISTENT_FLASHLOAN_PARAMS = '73';
  string internal constant LP_INCONSISTENT_PARAMS_LENGTH = '74';
  string internal constant UL_INVALID_INDEX = '77';
  string internal constant LP_NOT_CONTRACT = '78';
  string internal constant SDT_STABLE_DEBT_OVERFLOW = '79';
  string internal constant SDT_BURN_EXCEEDS_BALANCE = '80';
  string internal constant VT_COLLATERAL_DEPOSIT_REQUIRE_ETH = '81'; //Only accept ETH for collateral deposit
  string internal constant VT_COLLATERAL_DEPOSIT_INVALID = '82'; //Collateral deposit failed
  string internal constant VT_LIQUIDITY_DEPOSIT_INVALID = '83'; //Only accept USDC, USDT, DAI for liquidity deposit
  string internal constant VT_COLLATERAL_WITHDRAW_INVALID = '84'; //Collateral withdraw failed
  string internal constant VT_COLLATERAL_WITHDRAW_INVALID_AMOUNT = '85'; //Collateral withdraw has not enough amount
  string internal constant VT_CONVERT_ASSET_BY_CURVE_INVALID = '86'; //Convert asset by curve invalid
  string internal constant VT_PROCESS_YIELD_INVALID = '87'; //Processing yield is invalid
  string internal constant VT_TREASURY_INVALID = '88'; //Treasury is invalid
  string internal constant LP_ATOKEN_INIT_INVALID = '89'; //aToken invalid init
  string internal constant VT_FEE_TOO_BIG = '90'; //Fee is too big
  string internal constant VT_COLLATERAL_DEPOSIT_VAULT_UNAVAILABLE = '91';
  string internal constant LP_LIQUIDATION_CONVERT_FAILED = '92';
  string internal constant VT_DEPLOY_FAILED = '93'; // Vault deploy failed
  string internal constant VT_INVALID_CONFIGURATION = '94'; // Invalid vault configuration
  string internal constant VL_OVERFLOW_MAX_RESERVE_CAPACITY = '95'; // overflow max capacity of reserve
  string internal constant VT_WITHDRAW_AMOUNT_MISMATCH = '96'; // not performed withdraw 100%
  string internal constant VT_SWAP_MISMATCH_RETURNED_AMOUNT = '97'; //Returned amount is not enough
  string internal constant CALLER_NOT_YIELD_PROCESSOR = '98'; // 'The caller must be the pool admin'
  string internal constant VT_EXTRA_REWARDS_INDEX_INVALID = '97'; // Invalid extraRewards index
  string internal constant VT_SWAP_PATH_LENGTH_INVALID = '100'; // Invalid token or fee length
  string internal constant VT_SWAP_PATH_TOKEN_INVALID = '101'; // Invalid token information
  string internal constant CLAIMER_UNAUTHORIZED = '102'; // 'The claimer is not authorized'
  string internal constant YD_INVALID_CONFIGURATION = '103'; // 'The yield distribution's invalid configuration'
  string internal constant CALLER_NOT_EMISSION_MANAGER = '104'; // 'The caller must be emission manager'
  string internal constant CALLER_NOT_INCENTIVE_CONTROLLER = '105'; // 'The caller must be incentive controller'
  string internal constant YD_VR_ASSET_ALREADY_IN_USE = '106'; // Vault is already registered
  string internal constant YD_VR_INVALID_VAULT = '107'; // Invalid vault is used for an asset
  string internal constant YD_VR_INVALID_REWARDS_AMOUNT = '108'; // Rewards amount should be bigger than before
  string internal constant YD_VR_REWARD_TOKEN_NOT_VALID = '109'; // The reward token must be same with configured address
  string internal constant YD_VR_ASSET_NOT_REGISTERED = '110';
  string internal constant YD_VR_CALLER_NOT_VAULT = '111'; // The caller must be same with configured vault address
  string internal constant LS_INVALID_CONFIGURATION = '112'; // Invalid Leverage Swapper configuration
  string internal constant LS_SWAP_AMOUNT_NOT_GT_0 = '113'; // Collateral amount needs to be greater than zero
  string internal constant LS_STABLE_COIN_NOT_SUPPORTED = '114'; // Doesn't support swap for the stable coin
  string internal constant LS_SUPPLY_NOT_ALLOWED = '115'; // no sufficient funds
  string internal constant LS_SUPPLY_FAILED = '116'; // Deposit fails when leverage works
  string internal constant LS_REMOVE_ITERATION_OVER = '117'; // Withdraw iteration limit over
  string internal constant CALLER_NOT_WHITELIST_USER = '118'; // 'The caller must be whitelist user'
  string internal constant SAT_INVALID_OWNER = '119';
  string internal constant SAT_INVALID_EXPIRATION = '120';
  string internal constant SAT_INVALID_SIGNATURE = '121';
  string internal constant SAT_INVALID_DEPOSITOR = '122';
  string internal constant SAT_INVALID_RECIPIENT = '123';
  string internal constant SAT_ONLY_ONE_AMOUNT_FORMAT_ALLOWED = '125';
  string internal constant LS_REPAY_FAILED = '126';

  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/protocol/libraries/math/PercentageMath.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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

/**
 * @title PercentageMath library
 * @author Sturdy, inspiration from 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;
    }

    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) {
    uint256 halfPercentage = percentage / 2;

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

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



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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

/**
 * @title WadRayMath library
 * @author Sturdy, inspiration from 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;
    }

    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) {
    uint256 halfB = b / 2;

    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;
    }

    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) {
    uint256 halfB = b / 2;

    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;

    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;

    return result;
  }
}

// File: contracts/protocol/libraries/swap/BalancerswapAdapter2.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import {IERC20} from '../../../dependencies/openzeppelin/contracts/IERC20.sol';
import {IBalancerVault} from '../../../interfaces/IBalancerVault.sol';
import {SafeERC20} from '../../../dependencies/openzeppelin/contracts/SafeERC20.sol';
import {Errors} from '../../libraries/helpers/Errors.sol';

library BalancerswapAdapter2 {
  using SafeERC20 for IERC20;

  struct Path {
    address[] tokens;
    bytes32[] poolIds;
  }

  address constant BALANCER_VAULT = 0xBA12222222228d8Ba445958a75a0704d566BF2C8;

  function swapExactTokensForTokens(
    address assetToSwapFrom,
    address assetToSwapTo,
    uint256 amountToSwap,
    Path calldata path,
    uint256 minAmountOut
  ) external returns (uint256) {
    // Check path is valid
    uint256 length = path.tokens.length;
    require(length > 1 && length - 1 == path.poolIds.length, Errors.VT_SWAP_PATH_LENGTH_INVALID);
    require(
      path.tokens[0] == assetToSwapFrom && path.tokens[length - 1] == assetToSwapTo,
      Errors.VT_SWAP_PATH_TOKEN_INVALID
    );

    // Approves the transfer for the swap. Approves for 0 first to comply with tokens that implement the anti frontrunning approval fix.
    IERC20(assetToSwapFrom).safeApprove(address(BALANCER_VAULT), 0);
    if (IERC20(assetToSwapFrom).allowance(address(this), address(BALANCER_VAULT)) == 0)
      IERC20(assetToSwapFrom).safeApprove(address(BALANCER_VAULT), amountToSwap);

    IBalancerVault.BatchSwapStep[] memory swaps = new IBalancerVault.BatchSwapStep[](length - 1);
    int256[] memory limits = new int256[](length);
    for (uint256 i; i < length - 1; ++i) {
      swaps[i] = IBalancerVault.BatchSwapStep({
        poolId: path.poolIds[i],
        assetInIndex: i,
        assetOutIndex: i + 1,
        amount: 0,
        userData: '0'
      });
    }
    swaps[0].amount = amountToSwap;
    limits[0] = int256(amountToSwap);
    unchecked {
      limits[length - 1] = int256(0 - minAmountOut);
    }

    IBalancerVault.FundManagement memory funds = IBalancerVault.FundManagement({
      sender: address(this),
      fromInternalBalance: false,
      recipient: payable(address(this)),
      toInternalBalance: false
    });

    int256[] memory receivedAmount = IBalancerVault(BALANCER_VAULT).batchSwap(
      IBalancerVault.SwapKind.GIVEN_IN,
      swaps,
      path.tokens,
      funds,
      limits,
      block.timestamp
    );

    uint256 receivedPositveAmount;
    unchecked {
      receivedPositveAmount = uint256(0 - receivedAmount[length - 1]);
    }

    require(receivedPositveAmount != 0, Errors.VT_SWAP_MISMATCH_RETURNED_AMOUNT);
    require(
      IERC20(assetToSwapTo).balanceOf(address(this)) >= receivedPositveAmount,
      Errors.VT_SWAP_MISMATCH_RETURNED_AMOUNT
    );

    return receivedPositveAmount;
  }
}

// File: contracts/protocol/libraries/swap/CurveswapAdapter.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma abicoder v2;

import {IERC20Detailed} from '../../../dependencies/openzeppelin/contracts/IERC20Detailed.sol';
import {IERC20} from '../../../dependencies/openzeppelin/contracts/IERC20.sol';
import {IPriceOracleGetter} from '../../../interfaces/IPriceOracleGetter.sol';
import {ICurveAddressProvider} from '../../../interfaces/ICurveAddressProvider.sol';
import {ICurveExchange} from '../../../interfaces/ICurveExchange.sol';
import {ILendingPoolAddressesProvider} from '../../../interfaces/ILendingPoolAddressesProvider.sol';
import {SafeERC20} from '../../../dependencies/openzeppelin/contracts/SafeERC20.sol';
import {PercentageMath} from '../../libraries/math/PercentageMath.sol';
import {Errors} from '../../libraries/helpers/Errors.sol';

library CurveswapAdapter {
  using PercentageMath for uint256;
  using SafeERC20 for IERC20;

  struct Path {
    address[9] routes;
    uint256[3][4] swapParams;
  }

  address constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

  function swapExactTokensForTokens(
    ILendingPoolAddressesProvider addressesProvider,
    address poolAddress,
    address assetToSwapFrom,
    address assetToSwapTo,
    uint256 amountToSwap,
    uint256 slippage // 2% = 200
  ) external returns (uint256) {
    uint256 minAmountOut = _getMinAmount(
      addressesProvider,
      assetToSwapFrom,
      assetToSwapTo,
      amountToSwap,
      slippage
    );

    // Approves the transfer for the swap. Approves for 0 first to comply with tokens that implement the anti frontrunning approval fix.
    address curveAddressProvider = addressesProvider.getAddress('CURVE_ADDRESS_PROVIDER');
    address curveExchange = ICurveAddressProvider(curveAddressProvider).get_address(2);

    IERC20(assetToSwapFrom).safeApprove(address(curveExchange), 0);
    IERC20(assetToSwapFrom).safeApprove(address(curveExchange), amountToSwap);

    uint256 receivedAmount = ICurveExchange(curveExchange).exchange(
      poolAddress,
      assetToSwapFrom,
      assetToSwapTo,
      amountToSwap,
      minAmountOut,
      address(this)
    );

    require(receivedAmount != 0, Errors.VT_SWAP_MISMATCH_RETURNED_AMOUNT);
    uint256 balanceOfAsset;
    if (assetToSwapTo == ETH) {
      balanceOfAsset = address(this).balance;
    } else {
      balanceOfAsset = IERC20(assetToSwapTo).balanceOf(address(this));
    }
    require(balanceOfAsset >= receivedAmount, Errors.VT_SWAP_MISMATCH_RETURNED_AMOUNT);
    return receivedAmount;
  }

  function _getDecimals(address asset) internal view returns (uint256) {
    if (asset == ETH) {
      return 18;
    }
    return IERC20Detailed(asset).decimals();
  }

  function _getPrice(
    ILendingPoolAddressesProvider addressesProvider,
    address asset
  ) internal view returns (uint256) {
    if (asset == ETH) {
      return 1e18;
    }
    return IPriceOracleGetter(addressesProvider.getPriceOracle()).getAssetPrice(asset);
  }

  function _getMinAmount(
    ILendingPoolAddressesProvider addressesProvider,
    address assetToSwapFrom,
    address assetToSwapTo,
    uint256 amountToSwap,
    uint256 slippage
  ) internal view returns (uint256) {
    uint256 fromAssetDecimals = _getDecimals(assetToSwapFrom);
    uint256 toAssetDecimals = _getDecimals(assetToSwapTo);

    uint256 fromAssetPrice = _getPrice(addressesProvider, assetToSwapFrom);
    uint256 toAssetPrice = _getPrice(addressesProvider, assetToSwapTo);

    uint256 minAmountOut = ((amountToSwap * fromAssetPrice * 10 ** toAssetDecimals) /
      (toAssetPrice * 10 ** fromAssetDecimals)).percentMul(
        PercentageMath.PERCENTAGE_FACTOR - slippage
      );

    return minAmountOut;
  }
}

// File: contracts/protocol/libraries/swap/CurveswapAdapter2.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma abicoder v2;

import {IERC20} from '../../../dependencies/openzeppelin/contracts/IERC20.sol';
import {ICurveAddressProvider} from '../../../interfaces/ICurveAddressProvider.sol';
import {ICurveExchange} from '../../../interfaces/ICurveExchange.sol';
import {ILendingPoolAddressesProvider} from '../../../interfaces/ILendingPoolAddressesProvider.sol';
import {SafeERC20} from '../../../dependencies/openzeppelin/contracts/SafeERC20.sol';
import {Errors} from '../../libraries/helpers/Errors.sol';

library CurveswapAdapter2 {
  using SafeERC20 for IERC20;

  struct Path {
    address[9] routes;
    uint256[3][4] swapParams;
  }

  address constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

  function swapExactTokensForTokens(
    ILendingPoolAddressesProvider addressesProvider,
    address assetToSwapFrom,
    address assetToSwapTo,
    uint256 amountToSwap,
    Path calldata path,
    uint256 minAmountOut
  ) external returns (uint256) {
    // Approves the transfer for the swap. Approves for 0 first to comply with tokens that implement the anti frontrunning approval fix.
    address curveAddressProvider = addressesProvider.getAddress('CURVE_ADDRESS_PROVIDER');
    address curveExchange = ICurveAddressProvider(curveAddressProvider).get_address(2);

    IERC20(assetToSwapFrom).safeApprove(address(curveExchange), 0);
    IERC20(assetToSwapFrom).safeApprove(address(curveExchange), amountToSwap);

    address[4] memory pools;
    uint256 receivedAmount = ICurveExchange(curveExchange).exchange_multiple(
      path.routes,
      path.swapParams,
      amountToSwap,
      minAmountOut,
      pools,
      address(this)
    );

    require(receivedAmount != 0, Errors.VT_SWAP_MISMATCH_RETURNED_AMOUNT);
    uint256 balanceOfAsset;
    if (assetToSwapTo == ETH) {
      balanceOfAsset = address(this).balance;
    } else {
      balanceOfAsset = IERC20(assetToSwapTo).balanceOf(address(this));
    }
    require(balanceOfAsset >= receivedAmount, Errors.VT_SWAP_MISMATCH_RETURNED_AMOUNT);
    return receivedAmount;
  }
}

// File: contracts/protocol/libraries/swap/UniswapAdapter2.sol



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma abicoder v2;

import {IERC20} from '../../../dependencies/openzeppelin/contracts/IERC20.sol';
import {ISwapRouter} from '../../../interfaces/ISwapRouter.sol';
import {ILendingPoolAddressesProvider} from '../../../interfaces/ILendingPoolAddressesProvider.sol';
import {SafeERC20} from '../../../dependencies/openzeppelin/contracts/SafeERC20.sol';
import {Errors} from '../../libraries/helpers/Errors.sol';

library UniswapAdapter2 {
  using SafeERC20 for IERC20;

  struct Path {
    address[] tokens;
    uint256[] fees;
  }

  function swapExactTokensForTokens(
    ILendingPoolAddressesProvider addressesProvider,
    address assetToSwapFrom,
    address assetToSwapTo,
    uint256 amountToSwap,
    Path calldata path,
    uint256 minAmountOut
  ) external returns (uint256) {
    // Check path is valid
    uint256 length = path.tokens.length;
    require(length > 1 && length - 1 == path.fees.length, Errors.VT_SWAP_PATH_LENGTH_INVALID);
    require(
      path.tokens[0] == assetToSwapFrom && path.tokens[length - 1] == assetToSwapTo,
      Errors.VT_SWAP_PATH_TOKEN_INVALID
    );

    // Approves the transfer for the swap. Approves for 0 first to comply with tokens that implement the anti frontrunning approval fix.
    address UNISWAP_ROUTER = addressesProvider.getAddress('uniswapRouter');
    IERC20(assetToSwapFrom).safeApprove(address(UNISWAP_ROUTER), 0);
    IERC20(assetToSwapFrom).safeApprove(address(UNISWAP_ROUTER), amountToSwap);

    uint256 receivedAmount;
    if (length > 2) {
      bytes memory _path;

      for (uint256 i; i < length - 1; ++i) {
        _path = abi.encodePacked(_path, path.tokens[i], uint24(path.fees[i]));
      }
      _path = abi.encodePacked(_path, assetToSwapTo);

      ISwapRouter.ExactInputParams memory params = ISwapRouter.ExactInputParams({
        path: _path,
        recipient: address(this),
        deadline: block.timestamp,
        amountIn: amountToSwap,
        amountOutMinimum: minAmountOut
      });

      // Executes the swap.
      receivedAmount = ISwapRouter(UNISWAP_ROUTER).exactInput(params);
    } else {
      ISwapRouter.ExactInputSingleParams memory params = ISwapRouter.ExactInputSingleParams({
        tokenIn: assetToSwapFrom,
        tokenOut: assetToSwapTo,
        fee: uint24(path.fees[0]),
        recipient: address(this),
        deadline: block.timestamp,
        amountIn: amountToSwap,
        amountOutMinimum: minAmountOut,
        sqrtPriceLimitX96: 0
      });

      // Executes the swap.
      receivedAmount = ISwapRouter(UNISWAP_ROUTER).exactInputSingle(params);
    }

    require(receivedAmount != 0, Errors.VT_SWAP_MISMATCH_RETURNED_AMOUNT);
    require(
      IERC20(assetToSwapTo).balanceOf(address(this)) >= receivedAmount,
      Errors.VT_SWAP_MISMATCH_RETURNED_AMOUNT
    );

    return receivedAmount;
  }
}

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



// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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;
    //address of the yield contract
    address yieldAddress;
    //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
  }
}