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// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import {ZapperBase} from "./ZapperBase.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IVault} from "../interfaces/IVault.sol";
import {IDexType} from "../interfaces/IDexType.sol";
import {ILpRouter} from "../interfaces/ILpRouter.sol";
import {SphereXProtected} from "@spherex-xyz/contracts/src/SphereXProtected.sol";
import {IBeraPool, IBeraVault, IAsset} from "../interfaces/exchange/Beraswap.sol";

/**
 * @title InfraredZapper
 * @notice A zapper contract that enables single-token deposits and withdrawals for Infrared Strategy
 */
contract InfraredZapper is ZapperBase {
  using SafeERC20 for IERC20;

  mapping(address => bool) public isAssetSingleToken;
  mapping(address => IDexType.DexType) public assetDex;

  event AssetInfoSet(address asset, bool isSingleToken, IDexType.DexType dex);

  constructor(
    address devAddress,
    address wrappedNative,
    address stablecoin,
    address swapRouter,
    address lpRouter,
    address feeRecipient,
    uint16 zapInFee,
    uint16 zapOutFee
  ) ZapperBase(devAddress, wrappedNative, stablecoin, swapRouter, lpRouter, feeRecipient, zapInFee, zapOutFee) {}

  /**
   * @notice Converts input token amount to vault's asset
   * @param asset The vault's asset
   * @param tokenIn The token being deposited
   * @param tokenInAmount The amount of tokens being deposited
   * @param recipient The address to receive the asset
   * @return tokenOutAmount Amount of asset received
   * @return returnedAssets Array of remaining token balances to be returned to the user
   */
  function swapToAssets(
    address asset,
    address tokenIn,
    uint256 tokenInAmount,
    address recipient
  )
    public
    override
    sphereXGuardPublic(0x07c1e85d, 0x3218e83a)
    returns (uint256 tokenOutAmount, ReturnedAsset[] memory returnedAssets)
  {
    // Transfer tokens if needed
    if (recipient != address(this)) {
      tokenInAmount = _safeTransferFromTokens(tokenIn, tokenInAmount);
    }

    address[] memory tokens;
    if (isAssetSingleToken[asset]) {
      IERC20(tokenIn).safeTransfer(address(swapRouter), tokenInAmount);
      tokenOutAmount = swapRouter.swapWithDefaultDex(address(tokenIn), asset, tokenInAmount, 0, recipient);
      tokens = new address[](1);
      tokens[0] = address(tokenIn);
      returnedAssets = _returnAssets(tokens);
      return (tokenOutAmount, returnedAssets);
    }

    return _swapToAssetsLp(asset, tokenIn, tokenInAmount, recipient);
  }

  /**
   * @notice Converts input token amount to vault's asset
   * @param asset The vault's asset
   * @param tokenIn The token being deposited
   * @param tokenInAmount The amount of tokens being deposited
   * @param recipient The address to receive the asset
   * @return tokenOutAmount Amount of asset received
   * @return returnedAssets Array of remaining token balances to be returned to the user
   */
  function _swapToAssetsLp(
    address asset,
    address tokenIn,
    uint256 tokenInAmount,
    address recipient
  ) internal returns (uint256 tokenOutAmount, ReturnedAsset[] memory returnedAssets) {
    // Add liquidity
    IERC20(tokenIn).safeTransfer(address(lpRouter), tokenInAmount);
    tokenOutAmount = lpRouter.addLiquidity(asset, tokenIn, tokenInAmount, recipient, assetDex[asset]);

    // Return assets
    address[] memory checkTokens = new address[](1);
    checkTokens[0] = tokenIn;
    returnedAssets = _returnAssets(checkTokens);
  }

  /**
   * @notice Converts vault's asset to output token
   * @param asset The vault's asset
   * @param tokenOut The token the user wants to receive
   * @param assetsInAmount The amount of LP tokens being withdrawn
   * @param recipient The address to receive the output token
   * @return tokenOutAmount The amount of desired tokens received
   * @return returnedAssets Array of remaining token balances to be returned to the user
   */
  function swapFromAssets(
    address asset,
    address tokenOut,
    uint256 assetsInAmount,
    address recipient
  )
    public
    override
    sphereXGuardPublic(0x362279f7, 0xf99e6387)
    returns (uint256 tokenOutAmount, ReturnedAsset[] memory returnedAssets)
  {
    // Transfer tokens if needed
    if (recipient != address(this)) {
      assetsInAmount = _safeTransferFromTokens(asset, assetsInAmount);
    }

    if (isAssetSingleToken[asset]) {
      IERC20(asset).safeTransfer(address(swapRouter), assetsInAmount);
      tokenOutAmount = swapRouter.swapWithDefaultDex(asset, tokenOut, assetsInAmount, 0, recipient);
      address[] memory tokens = new address[](1);
      tokens[0] = asset;
      returnedAssets = _returnAssets(tokens);
      return (tokenOutAmount, returnedAssets);
    }

    return _swapFromAssetsLp(asset, tokenOut, assetsInAmount, recipient);
  }

  /**
   * @notice Converts vault's asset to output token
   * @param asset The vault's asset
   * @param tokenOut The token the user wants to receive
   * @param assetsInAmount The amount of LP tokens being withdrawn
   * @param recipient The address to receive the output token
   * @return tokenOutAmount The amount of desired tokens received
   * @return returnedAssets Array of remaining token balances to be returned to the user
   */
  function _swapFromAssetsLp(
    address asset,
    address tokenOut,
    uint256 assetsInAmount,
    address recipient
  ) internal returns (uint256 tokenOutAmount, ReturnedAsset[] memory returnedAssets) {
    // Remove liquidity
    IERC20(asset).safeTransfer(address(lpRouter), assetsInAmount);
    tokenOutAmount = lpRouter.removeLiquidity(asset, assetsInAmount, recipient, tokenOut, assetDex[asset]);

    if (recipient != address(this)) {
      _returnAsset(tokenOut, recipient);
    }

    address[] memory checkTokens = new address[](1);
    checkTokens[0] = address(0);
    returnedAssets = _returnAssets(checkTokens);
  }

  function setAssetInfo(address asset, bool isSingleToken, IDexType.DexType dex) external onlyGovernance {
    _revertAddressZero(asset);
    isAssetSingleToken[asset] = isSingleToken;
    assetDex[asset] = dex;
    emit AssetInfoSet(asset, isSingleToken, dex);
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC4626.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";
import {IERC20Metadata} from "../token/ERC20/extensions/IERC20Metadata.sol";

/**
 * @dev Interface of the ERC4626 "Tokenized Vault Standard", as defined in
 * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
 */
interface IERC4626 is IERC20, IERC20Metadata {
    event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);

    event Withdraw(
        address indexed sender,
        address indexed receiver,
        address indexed owner,
        uint256 assets,
        uint256 shares
    );

    /**
     * @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing.
     *
     * - MUST be an ERC-20 token contract.
     * - MUST NOT revert.
     */
    function asset() external view returns (address assetTokenAddress);

    /**
     * @dev Returns the total amount of the underlying asset that is “managed” by Vault.
     *
     * - SHOULD include any compounding that occurs from yield.
     * - MUST be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT revert.
     */
    function totalAssets() external view returns (uint256 totalManagedAssets);

    /**
     * @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToShares(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal
     * scenario where all the conditions are met.
     *
     * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
     * - MUST NOT show any variations depending on the caller.
     * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
     * - MUST NOT revert.
     *
     * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
     * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
     * from.
     */
    function convertToAssets(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
     * through a deposit call.
     *
     * - MUST return a limited value if receiver is subject to some deposit limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.
     * - MUST NOT revert.
     */
    function maxDeposit(address receiver) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit
     *   call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called
     *   in the same transaction.
     * - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the
     *   deposit would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewDeposit(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   deposit execution, and are accounted for during deposit.
     * - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function deposit(uint256 assets, address receiver) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
     * - MUST return a limited value if receiver is subject to some mint limit.
     * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.
     * - MUST NOT revert.
     */
    function maxMint(address receiver) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
     * current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call
     *   in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the
     *   same transaction.
     * - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint
     *   would be accepted, regardless if the user has enough tokens approved, etc.
     * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by minting.
     */
    function previewMint(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
     *
     * - MUST emit the Deposit event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint
     *   execution, and are accounted for during mint.
     * - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not
     *   approving enough underlying tokens to the Vault contract, etc).
     *
     * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
     */
    function mint(uint256 shares, address receiver) external returns (uint256 assets);

    /**
     * @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
     * Vault, through a withdraw call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxWithdraw(address owner) external view returns (uint256 maxAssets);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw
     *   call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if
     *   called
     *   in the same transaction.
     * - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though
     *   the withdrawal would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by depositing.
     */
    function previewWithdraw(uint256 assets) external view returns (uint256 shares);

    /**
     * @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   withdraw execution, and are accounted for during withdraw.
     * - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares);

    /**
     * @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
     * through a redeem call.
     *
     * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
     * - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.
     * - MUST NOT revert.
     */
    function maxRedeem(address owner) external view returns (uint256 maxShares);

    /**
     * @dev Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block,
     * given current on-chain conditions.
     *
     * - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call
     *   in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the
     *   same transaction.
     * - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the
     *   redemption would be accepted, regardless if the user has enough shares, etc.
     * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
     * - MUST NOT revert.
     *
     * NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in
     * share price or some other type of condition, meaning the depositor will lose assets by redeeming.
     */
    function previewRedeem(uint256 shares) external view returns (uint256 assets);

    /**
     * @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver.
     *
     * - MUST emit the Withdraw event.
     * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
     *   redeem execution, and are accounted for during redeem.
     * - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner
     *   not having enough shares, etc).
     *
     * NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
     * Those methods should be performed separately.
     */
    function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../utils/Address.sol";

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

    /**
     * @dev An operation with an ERC20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

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

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

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

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

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

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

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

        bytes memory returndata = address(token).functionCall(data);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

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

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

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @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;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

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

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

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}

// SPDX-License-Identifier: UNLICENSED
// (c) SphereX 2023 Terms&Conditions

pragma solidity ^0.8.0;

/**
 * @title Interface for SphereXEngine - definitions of core functionality
 * @author SphereX Technologies ltd
 * @notice This interface is imported by SphereXProtected, so that SphereXProtected can call functions from SphereXEngine
 * @dev Full docs of these functions can be found in SphereXEngine
 */
interface ISphereXEngine {
    function sphereXValidatePre(int256 num, address sender, bytes calldata data) external returns (bytes32[] memory);
    function sphereXValidatePost(
        int256 num,
        uint256 gas,
        bytes32[] calldata valuesBefore,
        bytes32[] calldata valuesAfter
    ) external;
    function sphereXValidateInternalPre(int256 num) external returns (bytes32[] memory);
    function sphereXValidateInternalPost(
        int256 num,
        uint256 gas,
        bytes32[] calldata valuesBefore,
        bytes32[] calldata valuesAfter
    ) external;

    function addAllowedSenderOnChain(address sender) external;

    /**
     * This function is taken as is from OZ IERC165, we don't inherit from OZ
     * to avoid collisions with the customer OZ version.
     *
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

/**
 * @dev this struct is used to reduce the stack usage of the modifiers.
 */
struct ModifierLocals {
    bytes32[] storageSlots;
    bytes32[] valuesBefore;
    uint256 gas;
    address engine;
}

// SPDX-License-Identifier: UNLICENSED
// (c) SphereX 2023 Terms&Conditions

pragma solidity ^0.8.0;

import {ISphereXEngine, ModifierLocals} from "./ISphereXEngine.sol";

/**
 * @title SphereX base Customer contract template
 */
/// @custom:oz-upgrades-unsafe-allow constructor
abstract contract SphereXConfiguration {
    /**
     * @dev we would like to avoid occupying storage slots
     * @dev to easily incorporate with existing contracts
     */
    bytes32 private constant SPHEREX_ADMIN_STORAGE_SLOT = bytes32(uint256(keccak256("eip1967.spherex.spherex")) - 1);
    bytes32 private constant SPHEREX_PENDING_ADMIN_STORAGE_SLOT =
        bytes32(uint256(keccak256("eip1967.spherex.pending")) - 1);
    bytes32 private constant SPHEREX_OPERATOR_STORAGE_SLOT = bytes32(uint256(keccak256("eip1967.spherex.operator")) - 1);
    bytes32 private constant SPHEREX_ENGINE_STORAGE_SLOT =
        bytes32(uint256(keccak256("eip1967.spherex.spherex_engine")) - 1);

    event ChangedSpherexOperator(address oldSphereXAdmin, address newSphereXAdmin);
    event ChangedSpherexEngineAddress(address oldEngineAddress, address newEngineAddress);
    event SpherexAdminTransferStarted(address currentAdmin, address pendingAdmin);
    event SpherexAdminTransferCompleted(address oldAdmin, address newAdmin);
    event NewAllowedSenderOnchain(address sender);

    /**
     * @dev used when the client doesn't use a proxy
     */
    constructor(address admin, address operator, address engine) {
        __SphereXProtectedBase_init(admin, operator, engine);
    }

    /**
     * @dev used when the client uses a proxy - should be called by the inhereter initialization
     */
    function __SphereXProtectedBase_init(address admin, address operator, address engine) internal virtual {
        _setAddress(SPHEREX_ADMIN_STORAGE_SLOT, admin);
        emit SpherexAdminTransferCompleted(address(0), admin);

        _setAddress(SPHEREX_OPERATOR_STORAGE_SLOT, operator);
        emit ChangedSpherexOperator(address(0), operator);

        _checkSphereXEngine(engine);
        _setAddress(SPHEREX_ENGINE_STORAGE_SLOT, engine);
        emit ChangedSpherexEngineAddress(address(0), engine);
    }

    // ============ Helper functions ============

    function _sphereXEngine() internal view returns (ISphereXEngine) {
        return ISphereXEngine(_getAddress(SPHEREX_ENGINE_STORAGE_SLOT));
    }

    /**
     * Stores a new address in an arbitrary slot
     * @param slot where to store the address
     * @param newAddress address to store in given slot
     */
    function _setAddress(bytes32 slot, address newAddress) internal {
        // solhint-disable-next-line no-inline-assembly
        // slither-disable-next-line assembly
        assembly {
            sstore(slot, newAddress)
        }
    }

    /**
     * Returns an address from an arbitrary slot.
     * @param slot to read an address from
     */
    function _getAddress(bytes32 slot) internal view returns (address addr) {
        // solhint-disable-next-line no-inline-assembly
        // slither-disable-next-line assembly
        assembly {
            addr := sload(slot)
        }
    }

    // ============ Local modifiers ============

    modifier onlySphereXAdmin() {
        require(msg.sender == _getAddress(SPHEREX_ADMIN_STORAGE_SLOT), "SphereX error: admin required");
        _;
    }

    modifier onlySpherexOperator() {
        require(msg.sender == _getAddress(SPHEREX_OPERATOR_STORAGE_SLOT), "SphereX error: operator required");
        _;
    }

    modifier returnsIfNotActivated() {
        if (address(_sphereXEngine()) == address(0)) {
            return;
        }

        _;
    }

    // ============ Management ============

    /**
     * Returns the currently pending admin address, the one that can call acceptSphereXAdminRole to become the admin.
     * @dev Could not use OZ Ownable2Step because the client's contract might use it.
     */
    function pendingSphereXAdmin() public view returns (address) {
        return _getAddress(SPHEREX_PENDING_ADMIN_STORAGE_SLOT);
    }

    /**
     * Returns the current admin address, the one that can call acceptSphereXAdminRole to become the admin.
     * @dev Could not use OZ Ownable2Step because the client's contract might use it.
     */
    function sphereXAdmin() public view returns (address) {
        return _getAddress(SPHEREX_ADMIN_STORAGE_SLOT);
    }

    /**
     * Returns the current operator address.
     */
    function sphereXOperator() public view returns (address) {
        return _getAddress(SPHEREX_OPERATOR_STORAGE_SLOT);
    }

    /**
     * Returns the current engine address.
     */
    function sphereXEngine() public view returns (address) {
        return _getAddress(SPHEREX_ENGINE_STORAGE_SLOT);
    }

    /**
     * Setting the address of the next admin. this address will have to accept the role to become the new admin.
     * @dev Could not use OZ Ownable2Step because the client's contract might use it.
     */
    function transferSphereXAdminRole(address newAdmin) public virtual onlySphereXAdmin {
        _setAddress(SPHEREX_PENDING_ADMIN_STORAGE_SLOT, newAdmin);
        emit SpherexAdminTransferStarted(sphereXAdmin(), newAdmin);
    }

    /**
     * Accepting the admin role and completing the transfer.
     * @dev Could not use OZ Ownable2Step because the client's contract might use it.
     */
    function acceptSphereXAdminRole() public virtual {
        require(pendingSphereXAdmin() == msg.sender, "SphereX error: not the pending account");
        address oldAdmin = sphereXAdmin();
        _setAddress(SPHEREX_ADMIN_STORAGE_SLOT, msg.sender);
        _setAddress(SPHEREX_PENDING_ADMIN_STORAGE_SLOT, address(0));
        emit SpherexAdminTransferCompleted(oldAdmin, msg.sender);
    }

    /**
     *
     * @param newSphereXOperator new address of the new operator account
     */
    function changeSphereXOperator(address newSphereXOperator) external onlySphereXAdmin {
        address oldSphereXOperator = _getAddress(SPHEREX_OPERATOR_STORAGE_SLOT);
        _setAddress(SPHEREX_OPERATOR_STORAGE_SLOT, newSphereXOperator);
        emit ChangedSpherexOperator(oldSphereXOperator, newSphereXOperator);
    }

    /**
     * Checks the given address implements ISphereXEngine or is address(0)
     * @param newSphereXEngine new address of the spherex engine
     */
    function _checkSphereXEngine(address newSphereXEngine) private view {
        require(
            newSphereXEngine == address(0)
                || ISphereXEngine(newSphereXEngine).supportsInterface(type(ISphereXEngine).interfaceId),
            "SphereX error: not a SphereXEngine"
        );
    }

    /**
     *
     * @param newSphereXEngine new address of the spherex engine
     * @dev this is also used to actually enable the defense
     * (because as long is this address is 0, the protection is disabled).
     */
    function changeSphereXEngine(address newSphereXEngine) external onlySpherexOperator {
        _checkSphereXEngine(newSphereXEngine);
        address oldEngine = _getAddress(SPHEREX_ENGINE_STORAGE_SLOT);
        _setAddress(SPHEREX_ENGINE_STORAGE_SLOT, newSphereXEngine);
        emit ChangedSpherexEngineAddress(oldEngine, newSphereXEngine);
    }
    // ============ Engine interaction ============

    function _addAllowedSenderOnChain(address newSender) internal {
        ISphereXEngine engine = _sphereXEngine();
        if (address(engine) != address(0)) {
            engine.addAllowedSenderOnChain(newSender);
            emit NewAllowedSenderOnchain(newSender);
        }
    }
}

// SPDX-License-Identifier: UNLICENSED
// (c) SphereX 2023 Terms&Conditions

pragma solidity ^0.8.0;

import {SphereXProtectedBase} from "./SphereXProtectedBase.sol";

/**
 * @title SphereX base Customer contract template
 * @dev notice this is an abstract
 */
abstract contract SphereXProtected is SphereXProtectedBase(msg.sender, address(0), address(0)) {}

// SPDX-License-Identifier: UNLICENSED
// (c) SphereX 2023 Terms&Conditions

pragma solidity ^0.8.0;

import {ISphereXEngine, ModifierLocals} from "./ISphereXEngine.sol";
import {SphereXConfiguration} from "./SphereXConfiguration.sol";

/**
 * @title SphereX base Customer contract template
 */
/// @custom:oz-upgrades-unsafe-allow constructor 
abstract contract SphereXProtectedBase is SphereXConfiguration {
    constructor(address admin, address operator, address engine) SphereXConfiguration(admin, operator, engine) {}

    // ============ Hooks ============

    /**
     * @dev internal function for engine communication. We use it to reduce contract size.
     *  Should be called before the code of a function.
     * @param num function identifier
     * @param isExternalCall set to true if this was called externally
     *  or a 'public' function from another address
     */
    function _sphereXValidatePre(int256 num, bool isExternalCall)
        private
        returnsIfNotActivated
        returns (ModifierLocals memory locals)
    {
        ISphereXEngine engine = _sphereXEngine();
        if (isExternalCall) {
            locals.storageSlots = engine.sphereXValidatePre(num, msg.sender, msg.data);
        } else {
            locals.storageSlots = engine.sphereXValidateInternalPre(num);
        }
        locals.valuesBefore = _readStorage(locals.storageSlots);
        locals.gas = gasleft();
        locals.engine = address(engine);
        return locals;
    }

    /**
     * @dev internal function for engine communication. We use it to reduce contract size.
     *  Should be called after the code of a function.
     * @param num function identifier
     * @param isExternalCall set to true if this was called externally
     *  or a 'public' function from another address
     */
    function _sphereXValidatePost(int256 num, bool isExternalCall, ModifierLocals memory locals) private {
        ISphereXEngine engine = ISphereXEngine(locals.engine);

        if (address(engine) == address(0)) {
            return;
        }

        uint256 gas = locals.gas - gasleft();

        bytes32[] memory valuesAfter;
        valuesAfter = _readStorage(locals.storageSlots);

        if (isExternalCall) {
            engine.sphereXValidatePost(num, gas, locals.valuesBefore, valuesAfter);
        } else {
            engine.sphereXValidateInternalPost(num, gas, locals.valuesBefore, valuesAfter);
        }
    }

    // ============ Modifiers ============

    /**
     *  @dev Modifier to be incorporated in all internal protected non-view functions
     */
    modifier sphereXGuardInternal(int256 num) {
        ModifierLocals memory locals = _sphereXValidatePre(num, false);
        _;
        _sphereXValidatePost(-num, false, locals);
    }

    /**
     *  @dev Modifier to be incorporated in all external protected non-view functions
     */
    modifier sphereXGuardExternal(int256 num) {
        ModifierLocals memory locals = _sphereXValidatePre(num, true);
        _;
        _sphereXValidatePost(-num, true, locals);
    }

    /**
     *  @dev Modifier to be incorporated in all public protected non-view functions
     */
    modifier sphereXGuardPublic(int256 num, bytes4 selector) {
        ModifierLocals memory locals = _sphereXValidatePre(num, msg.sig == selector);
        _;
        _sphereXValidatePost(-num, msg.sig == selector, locals);
    }

    // ============ Internal Storage logic ============

    /**
     * Internal function that reads values from given storage slots and returns them
     * @param storageSlots list of storage slots to read
     * @return list of values read from the various storage slots
     */
    function _readStorage(bytes32[] memory storageSlots) internal view returns (bytes32[] memory) {
        uint256 arrayLength = storageSlots.length;
        bytes32[] memory values = new bytes32[](arrayLength);
        // create the return array data

        for (uint256 i = 0; i < arrayLength; i++) {
            bytes32 slot = storageSlots[i];
            bytes32 temp_value;
            // solhint-disable-next-line no-inline-assembly
            // slither-disable-next-line assembly
            assembly {
                temp_value := sload(slot)
            }

            values[i] = temp_value;
        }
        return values;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

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

interface IAsset {
  // solhint-disable-previous-line no-empty-blocks
}

interface IBeraVault {
  struct SingleSwap {
    bytes32 poolId;
    SwapKind kind;
    IAsset assetIn;
    IAsset assetOut;
    uint256 amount;
    bytes userData;
  }

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

  struct FundManagement {
    address sender;
    bool fromInternalBalance;
    address payable recipient;
    bool toInternalBalance;
  }

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

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

  enum PoolSpecialization {
    GENERAL,
    MINIMAL_SWAP_INFO,
    TWO_TOKEN
  }

  enum SwapKind {
    GIVEN_IN,
    GIVEN_OUT
  }

  function getPoolTokens(
    bytes32 poolId
  ) external view returns (IERC20[] memory tokens, uint256[] memory balances, uint256 lastChangeBlock);

  function getPool(bytes32 poolId) external view returns (address, PoolSpecialization);

  function swap(
    SingleSwap memory singleSwap,
    FundManagement memory funds,
    uint256 limit,
    uint256 deadline
  ) external returns (uint256 amountCalculated);

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

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

  function exitPool(bytes32 poolId, address sender, address payable recipient, ExitPoolRequest memory request) external;
}

interface IBeraPool {
  function getPoolId() external view returns (bytes32);

  function getVault() external view returns (address);

  function balanceOf(address account) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

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

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

  function approve(address guy, uint256 wad) external returns (bool);

  function totalSupply() external view returns (uint256);

  function transferFrom(address src, address dst, uint256 wad) external returns (bool);

  function withdraw(uint256 wad) external;

  function withdrawTo(address account, uint256 amount) external;

  function decimals() external view returns (uint8);

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

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

  function transfer(address dst, uint256 wad) external returns (bool);

  function deposit() external payable;

  function allowance(address, address) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

interface IDexType {
  /// @notice Enum representing different DEX types
  enum DexType {
    UNISWAP_V2, // 0
    UNISWAP_V3, // 1
    SUSHISWAP_V2, // 2
    SUSHISWAP_V3, // 3
    CAMELOT_V3, // 4
    BEX, // 5
    KODIAK_V3, // 6
    KODIAK_V2, // 7
    STEER, // 8
    GAMMA // 9
  }

  /// @notice Emitted when the default DEX is set
  /// @param dex The DEX index
  event SetDefaultDex(uint8 dex);

  /// @notice Thrown when trying to use an unsupported DEX type
  error UnsupportedDexType();
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import {IDexType} from "./IDexType.sol";

interface ILpRouter is IDexType {
  /// @notice Thrown when router arrays have mismatched lengths
  error InvalidRouterLength();

  /// @notice Thrown when router address is zero
  error ZeroRouterAddress();

  /// @notice Thrown when address is zero
  error ZeroAddress();

  /// @notice Thrown when a function is called by an address that isn't governance
  error NotGovernance();

  /// @notice Thrown when total ratio is zero
  error TotalRatioZero();

  /// @notice Emitted when the governance is updated
  event GovernanceUpdated(address indexed oldGovernance, address indexed newGovernance);

  /// @notice Emitted when a router is set for a DEX
  /// @param dex The DEX index
  /// @param router The router address
  event SetRouter(uint8 dex, address indexed router);

  /// @notice Emitted when a swap router is set
  /// @param swapRouter The swap router address
  event SetSwapRouter(address indexed old, address indexed swapRouter);

  struct LiquidityAddInfo {
    address lp;
    address token0;
    address token1;
    uint256 amount0;
    uint256 amount1;
  }

  struct LiquidityRemoveInfo {
    address lp;
    uint256 lpAmount;
    address token0;
    address token1;
    address recipient;
  }

  function addLiquidity(
    address lp,
    address tokenIn,
    uint256 amountIn,
    address recipient,
    DexType dexType
  ) external returns (uint256 lpAmountOut);

  function removeLiquidity(
    address lp,
    uint256 lpAmount,
    address recipient,
    address tokenOut,
    DexType dexType
  ) external returns (uint256 tokenOutAmount);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import {IDexType} from "./IDexType.sol";

import {IBeraPool} from "./exchange/Beraswap.sol";

/**
 * @title ISwapRouter
 * @notice Interface for the SwapRouter contract that handles token swaps across multiple DEXes
 */
interface ISwapRouter is IDexType {
  // Errors
  /// @notice Thrown when router arrays have mismatched lengths
  error InvalidRouterLength();
  /// @notice Thrown when router/factory arrays have mismatched lengths
  error InvalidFactoryLength();
  /// @notice Thrown when path length is less than 2
  error InvalidPathLength();
  /// @notice Thrown when address is zero
  error ZeroAddress();
  /// @notice Thrown when router address is zero
  error ZeroRouterAddress();
  /// @notice Thrown when trying to use an unsupported factory
  error FactoryNotSupported();
  /// @notice Thrown when trying to use an unsupported router
  error RouterNotSupported();
  /// @notice Thrown when no pool is found for a multihop swap
  error NoPoolFoundForMultihopSwap();
  /// @notice Thrown when no pool is found for a multihop quote
  error NoPoolFoundForMultihopQuote();
  /// @notice Thrown when output amount is less than minimum
  /// @param amountOut Actual output amount
  /// @param amountOutMinimum Minimum required output amount
  error InsufficientOutputAmount(uint256 amountOut, uint256 amountOutMinimum);
  /// @notice Thrown when amount is zero
  error ZeroAmount();
  /// @notice Thrown when a function is called by an address that isn't governance
  error NotGovernance();
  /// @notice Thrown when no swap route is found
  error NoSwapRouteFound();
  /// @notice Thrown when path length exceeds the maximum
  error PathLengthExceeded();
  /// @notice Thrown when no pool is found for a token pair
  error NoPoolFound();

  // Events
  /// @notice Emitted when the governance is updated
  event GovernanceUpdated(address indexed oldGovernance, address indexed newGovernance);
  /// @notice Emitted when a router is set for a DEX
  /// @param dex The DEX index
  /// @param router The router address
  event SetRouter(uint8 dex, address indexed router);
  /// @notice Emitted when a factory is set for a DEX
  /// @param dex The DEX index
  /// @param factory The factory address
  event SetFactory(uint8 dex, address indexed factory);
  /// @notice Emitted when a pool is set
  /// @param tokenIn The input token address
  /// @param tokenOut The output token address
  /// @param pool The pool address
  event SetPool(address indexed tokenIn, address indexed tokenOut, address pool);
  /// @notice Emitted when a swap route is set
  /// @param tokenIn The input token address
  /// @param tokenOut The output token address
  /// @param path The swap route path
  /// @param reversePath Whether to set the inverse swap route
  event SetSwapRoute(address indexed tokenIn, address indexed tokenOut, SwapRoutePath[] path, bool reversePath);

  /// @notice Struct for a swap route path
  /// @param tokenIn The input token address
  /// @param tokenOut The output token address
  /// @param dex The DEX type
  /// @param isMultiPath Whether the path is a multi-path swap
  /// @param pool The pool address
  struct SwapRoutePath {
    address tokenIn;
    address tokenOut;
    DexType dex;
    bool isMultiPath;
    address pool;
  }

  // Functions
  /// @notice Returns the wrapped native token address (e.g. WETH)
  /// @return The address of the wrapped native token
  function wrappedNative() external view returns (address);

  /// @notice Returns the router address for a given DEX
  /// @param dex The DEX index
  /// @return The router address
  function routers(uint8 dex) external view returns (address);

  /// @notice Returns the factory address for a given DEX
  /// @param dex The DEX index
  /// @return The factory address
  function factories(uint8 dex) external view returns (address);

  /// @notice Returns the default DEX type used for swaps
  /// @return The default DexType enum value
  function defaultDex() external view returns (DexType);

  /// @notice Swaps tokens using the default DEX
  /// @param tokenIn The input token address
  /// @param tokenOut The output token address
  /// @param amountIn The amount of input tokens
  /// @param amountOutMinimum The minimum amount of output tokens required
  /// @param recipient The address that will receive the output tokens
  /// @return amountOut The amount of output tokens received
  function swapWithDefaultDex(
    address tokenIn,
    address tokenOut,
    uint256 amountIn,
    uint256 amountOutMinimum,
    address recipient
  ) external returns (uint256 amountOut);

  /// @notice Swaps tokens using a specified DEX
  /// @param tokenIn The input token address
  /// @param tokenOut The output token address
  /// @param amountIn The amount of input tokens
  /// @param amountOutMinimum The minimum amount of output tokens required
  /// @param recipient The address that will receive the output tokens
  /// @param dex The DEX to use for the swap
  /// @return amountOut The amount of output tokens received
  function swap(
    address tokenIn,
    address tokenOut,
    uint256 amountIn,
    uint256 amountOutMinimum,
    address recipient,
    DexType dex
  ) external returns (uint256 amountOut);

  /// @notice Performs a multi-hop swap using the default DEX
  /// @param path Array of token addresses representing the swap path
  /// @param amountIn The amount of input tokens
  /// @param amountOutMinimum The minimum amount of output tokens required
  /// @param recipient The address that will receive the output tokens
  /// @return amountOut The amount of output tokens received
  function swapWithPathWithDefaultDex(
    address[] calldata path,
    uint256 amountIn,
    uint256 amountOutMinimum,
    address recipient
  ) external returns (uint256 amountOut);

  /// @notice Performs a multi-hop swap using a specified DEX
  /// @param path Array of token addresses representing the swap path
  /// @param amountIn The amount of input tokens
  /// @param amountOutMinimum The minimum amount of output tokens required
  /// @param recipient The address that will receive the output tokens
  /// @param dex The DEX to use for the swap
  /// @return amountOut The amount of output tokens received
  function swapWithPath(
    address[] calldata path,
    uint256 amountIn,
    uint256 amountOutMinimum,
    address recipient,
    DexType dex
  ) external returns (uint256 amountOut);

  /// @notice Gets a quote for a swap using the default DEX
  /// @param tokenIn The input token address
  /// @param tokenOut The output token address
  /// @param amountIn The amount of input tokens
  /// @return amountOut The expected amount of output tokens
  function getQuoteWithDefaultDex(
    address tokenIn,
    address tokenOut,
    uint256 amountIn
  ) external view returns (uint256 amountOut);

  /// @notice Gets a quote for a swap using a specified DEX
  /// @param tokenIn The input token address
  /// @param tokenOut The output token address
  /// @param amountIn The amount of input tokens
  /// @param dex The DEX to use for the quote
  /// @return amountOut The expected amount of output tokens
  function getQuote(
    address tokenIn,
    address tokenOut,
    uint256 amountIn,
    DexType dex
  ) external view returns (uint256 amountOut);

  /// @notice Gets a quote for a multi-hop swap using the default DEX
  /// @param path Array of token addresses representing the swap path
  /// @param amountIn The amount of input tokens
  /// @return amountOut The expected amount of output tokens
  function getQuoteWithPathWithDefaultDex(
    address[] memory path,
    uint256 amountIn
  ) external view returns (uint256 amountOut);

  /// @notice Gets a quote for a multi-hop swap using a specified DEX
  /// @param path Array of token addresses representing the swap path
  /// @param amountIn The amount of input tokens
  /// @param dex The DEX to use for the quote
  /// @return amountOut The expected amount of output tokens
  function getQuoteWithPath(
    address[] memory path,
    uint256 amountIn,
    DexType dex
  ) external view returns (uint256 amountOut);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";

/**
 * @title IVault
 * @notice Interface for Contrax Vault functionality
 */
interface IVault is IERC4626 {
  // Errors
  /// @notice Thrown when attempting to set a zero address
  error ZeroAddress();
  /// @notice Thrown when a caller is not the governance address
  error NotGovernance();
  /// @notice Thrown when a caller is not the timelock address
  error NotTimelock();
  /// @notice Thrown when a caller is not the controller address
  error NotController();
  /// @notice Thrown when attempting to set min ratio higher than max
  error MinGreaterThanMax();
  /// @notice Thrown when attempting to harvest the vault's underlying asset
  error CannotHarvestAsset();
  /// @notice Thrown when deposit results in fewer shares than minimum specified
  error InsufficientOutputShares(uint256 shares, uint256 minShares);
  /// @notice Thrown when redemption results in fewer assets than minimum specified
  error InsufficientOutputAssets(uint256 assets, uint256 minAssets);
  /// @notice Thrown when a fee is set that is greater than the maximum allowed
  error FeeTooHigh(uint16 fee, uint16 maxFee);
  /// @notice Thrown when there are no funds to earn
  error NoFundsToEarn();

  // Events
  /// @notice Emitted when the governance address is updated
  /// @param oldGovernance The old governance address
  /// @param newGovernance The new governance address
  event GovernanceChanged(address indexed oldGovernance, address indexed newGovernance);
  /// @notice Emitted when the timelock address is updated
  /// @param oldTimelock The old timelock address
  /// @param newTimelock The new timelock address
  event TimelockChanged(address indexed oldTimelock, address indexed newTimelock);
  /// @notice Emitted when the controller address is updated
  /// @param oldController The old controller address
  /// @param newController The new controller address
  event ControllerChanged(address indexed oldController, address indexed newController);
  /// @notice Emitted when the minimum ratio is updated
  /// @param oldMin The old minimum ratio
  /// @param newMin The new minimum ratio
  event MinChanged(uint256 oldMin, uint256 newMin);
  /// @notice Emitted when the deposit fee is updated
  /// @param oldFee The old deposit fee
  /// @param newFee The new deposit fee
  event DepositFeeChanged(uint16 oldFee, uint16 newFee);
  /// @notice Emitted when the withdraw fee is updated
  /// @param oldFee The old withdraw fee
  /// @param newFee The new withdraw fee
  event WithdrawFeeChanged(uint16 oldFee, uint16 newFee);

  // Functions
  /// @notice Sends available assets to controller to be invested in strategy
  function earn() external;

  /// @notice Calculates amount of assets available to be sent to strategy
  /// @return uint256 Amount of assets available
  function available() external view returns (uint256);

  /// @notice Deposits assets with minimum shares check
  /// @param assets Amount of assets to deposit
  /// @param receiver Address receiving the shares
  /// @param minShares Minimum shares that must be minted
  /// @return shares Amount of shares minted
  function deposit(uint256 assets, address receiver, uint256 minShares) external returns (uint256 shares);

  /// @notice Redeems shares with minimum assets check
  /// @param shares Amount of shares to redeem
  /// @param receiver Address receiving the assets
  /// @param owner Address that owns the shares
  /// @param minAssets Minimum assets that must be returned
  /// @return assets Amount of assets returned
  function redeem(uint256 shares, address receiver, address owner, uint256 minAssets) external returns (uint256 assets);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {IWETH} from "../interfaces/exchange/IWETH.sol";
import {ISwapRouter} from "../interfaces/ISwapRouter.sol";
import {IVault} from "../interfaces/IVault.sol";

/**
 * @title IZapper Interface
 * @notice Interface for contracts that enable deposits/withdrawals from vaults using any token
 * @dev Implements functionality for converting tokens and interacting with vaults
 */
interface IZapper {
  // Structs
  /**
   * @notice Struct to track leftover tokens returned to users
   * @param tokens Address of the token
   * @param amounts Amount of tokens returned
   */
  struct ReturnedAsset {
    address tokens;
    uint256 amounts;
  }

  // Errors
  /// @notice Thrown when a non-governance address calls a governance-only function
  error NotGovernance();
  /// @notice Thrown when a zero address is provided
  error ZeroAddress();
  /// @notice Thrown when input amount is below minimum required
  error InsufficientInputAmount(address token, uint256 provided, uint256 minimum);
  /// @notice Thrown when token approval is missing
  error TokenNotApproved();
  /// @notice Thrown when ETH transfer fails
  error ETHTransferFailed();
  /// @notice Thrown when output amount is below minimum required
  error InsufficientOutputAmount(address token, uint256 received, uint256 minimum);
  /// @notice Thrown when fee percentage is too high
  error FeeTooHigh(uint16 fee, uint16 maxFee);
  /// @notice Thrown when total ratio is zero
  error TotalRatioZero();

  // Events
  /// @notice Emitted when swap router address is updated
  /// @param newSwapRouter Address of the new swap router
  /// @param oldSwapRouter Address of the previous swap router
  event SwapRouterChanged(address indexed newSwapRouter, address indexed oldSwapRouter);
  /// @notice Emitted when stablecoin address is updated
  /// @param newStableCoin Address of the new stablecoin
  /// @param oldStableCoin Address of the previous stablecoin
  event StableCoinChanged(address indexed newStableCoin, address indexed oldStableCoin);
  /// @notice Emitted when governance address is updated
  /// @param newGovernance Address of the new governance
  /// @param oldGovernance Address of the previous governance
  event GovernanceChanged(address indexed newGovernance, address indexed oldGovernance);
  /// @notice Emitted when lp router address is updated
  /// @param newLpRouter Address of the new lp router
  /// @param oldLpRouter Address of the previous lp router
  event LpRouterChanged(address indexed newLpRouter, address indexed oldLpRouter);
  /// @notice Emitted when zapIn fee is updated
  /// @param oldFee Previous fee percentage in basis points
  /// @param newFee New fee percentage in basis points
  event ZapInFeeChanged(uint16 oldFee, uint16 newFee);
  /// @notice Emitted when zapOut fee is updated
  /// @param oldFee Previous fee percentage in basis points
  /// @param newFee New fee percentage in basis points
  event ZapOutFeeChanged(uint16 oldFee, uint16 newFee);
  /// @notice Emitted when fee recipient is updated
  /// @param oldRecipient Address of the previous fee recipient
  /// @param newRecipient Address of the new fee recipient
  event FeeRecipientChanged(address indexed oldRecipient, address indexed newRecipient);
  /// @notice Emitted when tokens are deposited into a vault
  /// @param user Address of the depositor
  /// @param vault Address of the target vault
  /// @param tokenIn Address of the input token
  /// @param tokenInAmount Amount of input tokens
  /// @param assetsIn Amount of assets deposited
  /// @param shares Amount of vault shares received
  /// @param fee Amount of fee paid
  /// @param returnedAssets Array of any remaining tokens returned to caller
  event ZapIn(
    address indexed user,
    address indexed vault,
    address tokenIn,
    uint256 tokenInAmount,
    uint256 assetsIn,
    uint256 shares,
    uint256 fee,
    ReturnedAsset[] returnedAssets
  );
  /// @notice Emitted when tokens are withdrawn from a vault
  /// @param user Address of the withdrawer
  /// @param vault Address of the source vault
  /// @param tokenOut Address of the output token
  /// @param tokenOutAmount Amount of output tokens
  /// @param assetsOut Amount of assets withdrawn
  /// @param shares Amount of vault shares withdrawn
  /// @param fee Amount of fee paid
  /// @param returnedAssets Array of any remaining tokens returned to caller
  event ZapOut(
    address indexed user,
    address indexed vault,
    address tokenOut,
    uint256 tokenOutAmount,
    uint256 assetsOut,
    uint256 shares,
    uint256 fee,
    ReturnedAsset[] returnedAssets
  );

  /**
   * @notice Converts input token balance of address(this) to vault's desired token
   * @param vault The vault to deposit into
   * @param tokenIn The input token to convert
   * @return assetsOut Amount of converted assets
   * @return returnedAssets Array of any remaining tokens returned to caller
   */
  function swapToAssets(
    address vault,
    address tokenIn,
    uint256 tokenInAmount,
    address recipient
  ) external returns (uint256 assetsOut, ReturnedAsset[] memory returnedAssets);

  /**
   * @notice Converts vault's desired token balance to output token
   * @param vault The vault to withdraw from
   * @param tokenOut The output token to convert
   * @return tokenOutAmount Amount of converted tokens
   * @return returnedAssets Array of any remaining tokens returned to caller
   */
  function swapFromAssets(
    address vault,
    address tokenOut,
    uint256 assetsInAmount,
    address recipient
  ) external returns (uint256 tokenOutAmount, ReturnedAsset[] memory returnedAssets);

  /// @notice Deposits tokens into a vault after converting them if necessary
  /// @param vault Target vault
  /// @param tokenIn Input token address
  /// @param tokenInAmount Amount of input tokens
  /// @param minShares Minimum amount of vault shares to receive
  /// @return shares Number of vault shares received
  /// @return returnedAssets Array of any remaining tokens returned to caller
  function zapIn(
    IVault vault,
    address tokenIn,
    uint256 tokenInAmount,
    uint256 minShares
  ) external payable returns (uint256 shares, ReturnedAsset[] memory returnedAssets);

  /// @notice Withdraws from vault and converts to desired token
  /// @param vault Source vault
  /// @param withdrawAmount Amount of vault shares to withdraw
  /// @param tokenOut Desired output token
  /// @param minTokenOutAmount Minimum amount of desired tokens to receive
  /// @return tokenOutAmount Amount of output tokens received
  /// @return returnedAssets Array of any remaining tokens returned to caller
  function zapOut(
    IVault vault,
    uint256 withdrawAmount,
    address tokenOut,
    uint256 minTokenOutAmount
  ) external returns (uint256 tokenOutAmount, ReturnedAsset[] memory returnedAssets);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {IWETH} from "../interfaces/exchange/IWETH.sol";
import {ISwapRouter} from "../interfaces/ISwapRouter.sol";
import {ILpRouter} from "../interfaces/ILpRouter.sol";
import {IVault} from "../interfaces/IVault.sol";
import {IZapper} from "../interfaces/IZapper.sol";
import {SphereXProtected} from "@spherex-xyz/contracts/src/SphereXProtected.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

/**
 * @title ZapperBase
 * @notice Base contract for implementing zapper functionality that allows users to deposit/withdraw
 * from vaults using any token through automated swaps
 * @dev This is an abstract contract that should be inherited by specific zapper implementations
 */
abstract contract ZapperBase is SphereXProtected, ReentrancyGuard, IZapper {
  using Address for address;
  using SafeERC20 for IERC20;
  using SafeERC20 for IVault;

  /// @notice Minimum token amount required for zap operations to prevent dust transactions
  uint16 public constant MINIMUM_AMOUNT = 1000;

  /// @notice Maximum fee that can be set (10% = 1000 basis points)
  uint16 public constant MAX_FEE = 1000;

  /// @notice Maximum fee that can be set in basis points (100% = 10000 basis points)
  uint16 public constant MAX_FEE_BPS = 10000;

  /// @notice The wrapped version of the native token (e.g., WBERA)
  IWETH public immutable wrappedNative;

  /// @notice The fee percentage for zapIn operations in basis points (1/10000)
  uint16 public zapInFee;

  /// @notice The fee percentage for zapOut operations in basis points (1/10000)
  uint16 public zapOutFee;

  /// @notice The stablecoin token contract used for price calculations and intermediate swaps
  IERC20 public stablecoin;

  /// @notice Address of the contract administrator with special privileges
  address public governance;

  /// @notice Router contract used for token swaps
  ISwapRouter public swapRouter;

  /// @notice Router contract used for add or remove Liquidity
  ILpRouter public lpRouter;

  /// @notice Address that receives the fees
  address public feeRecipient;

  /**
   * @notice Constructs the ZapperBase contract
   * @param devAddress Address of the contract administrator
   * @param wrappedNativeAddress Address of the wrapped native token (e.g. WBERA)
   * @param stablecoinAddress Address of the stablecoin token
   * @param swapRouterAddress Address of the swap router contract
   * @param lpRouterAddress Address of the lp router contract
   * @param feeRecipientAddress Address that receives the fees
   * @param initialZapInFee Initial zapIn fee percentage in basis points
   * @param initialZapOutFee Initial zapOut fee percentage in basis points
   */
  constructor(
    address devAddress,
    address wrappedNativeAddress,
    address stablecoinAddress,
    address swapRouterAddress,
    address lpRouterAddress,
    address feeRecipientAddress,
    uint16 initialZapInFee,
    uint16 initialZapOutFee
  ) {
    if (
      devAddress == address(0) ||
      wrappedNativeAddress == address(0) ||
      stablecoinAddress == address(0) ||
      swapRouterAddress == address(0) ||
      lpRouterAddress == address(0) ||
      feeRecipientAddress == address(0)
    ) revert ZeroAddress();

    governance = devAddress;
    wrappedNative = IWETH(wrappedNativeAddress);

    wrappedNative.deposit{value: 0}();
    wrappedNative.withdraw(0);

    stablecoin = IERC20(stablecoinAddress);
    swapRouter = ISwapRouter(swapRouterAddress);
    lpRouter = ILpRouter(lpRouterAddress);

    if (initialZapInFee > MAX_FEE) revert FeeTooHigh(initialZapInFee, MAX_FEE);
    if (initialZapOutFee > MAX_FEE) revert FeeTooHigh(initialZapOutFee, MAX_FEE);

    feeRecipient = feeRecipientAddress;
    zapInFee = initialZapInFee;
    zapOutFee = initialZapOutFee;
  }

  /// @notice Restricts function access to only the governance address
  modifier onlyGovernance() {
    if (msg.sender != governance) revert NotGovernance();
    _;
  }

  /**
   * @notice Updates the governance address, only callable by governance
   * @param governanceAddress New governance address
   */
  function setGovernance(address governanceAddress) external onlyGovernance {
    _revertAddressZero(governanceAddress);
    governance = governanceAddress;
    emit GovernanceChanged(governanceAddress, governance);
  }

  /**
   * @notice Updates the swap router address, only callable by governance
   * @param routerAddress New swap router address
   */
  function setSwapRouter(address routerAddress) external onlyGovernance sphereXGuardExternal(0xd473ef3c) {
    _revertAddressZero(routerAddress);
    address old = address(swapRouter);
    swapRouter = ISwapRouter(routerAddress);
    emit SwapRouterChanged(old, routerAddress);
  }

  /**
   * @notice Updates the lp router address, only callable by governance
   * @param routerAddress New lp router address
   */
  function setLpRouter(address routerAddress) external onlyGovernance sphereXGuardExternal(0x26b2eef4) {
    _revertAddressZero(routerAddress);
    address old = address(lpRouter);
    lpRouter = ILpRouter(routerAddress);
    emit LpRouterChanged(old, routerAddress);
  }

  /**
   * @notice Updates the stablecoin address, only callable by governance
   * @param stablecoinAddress New stablecoin address
   */
  function setStableCoin(address stablecoinAddress) external onlyGovernance sphereXGuardExternal(0x5b9fdae4) {
    _revertAddressZero(stablecoinAddress);
    stablecoin = IERC20(stablecoinAddress);
    emit StableCoinChanged(address(stablecoin), stablecoinAddress);
  }

  /**
   * @notice Updates the zapIn fee percentage, only callable by governance
   * @param newFee New fee percentage in basis points
   */
  function setZapInFee(uint16 newFee) external onlyGovernance {
    if (newFee > MAX_FEE) revert FeeTooHigh(newFee, MAX_FEE);
    uint16 oldFee = zapInFee;
    zapInFee = newFee;
    emit ZapInFeeChanged(oldFee, newFee);
  }

  /**
   * @notice Updates the zapOut fee percentage, only callable by governance
   * @param newFee New fee percentage in basis points
   */
  function setZapOutFee(uint16 newFee) external onlyGovernance {
    if (newFee > MAX_FEE) revert FeeTooHigh(newFee, MAX_FEE);
    uint16 oldFee = zapOutFee;
    zapOutFee = newFee;
    emit ZapOutFeeChanged(oldFee, newFee);
  }

  /**
   * @notice Updates the fee recipient address, only callable by governance
   * @param newRecipient New address to receive fees
   */
  function setFeeRecipient(address newRecipient) external onlyGovernance {
    _revertAddressZero(newRecipient);
    address oldRecipient = feeRecipient;
    feeRecipient = newRecipient;
    emit FeeRecipientChanged(oldRecipient, newRecipient);
  }

  receive() external payable {
    assert(msg.sender == address(wrappedNative));
  }

  /** Internal functions */

  function _revertAddressZero(address addressToCheck) internal pure {
    if (addressToCheck == address(0)) revert ZeroAddress();
  }

  /**
   * @notice Approves spending of a token if not already approved
   * @param tokenAddress Token to approve
   * @param spenderAddress Address to approve spending for
   */
  function _approveTokenIfNeeded(
    address tokenAddress,
    address spenderAddress
  ) internal sphereXGuardInternal(0x367a5b5d) {
    if (IERC20(tokenAddress).allowance(address(this), spenderAddress) == 0) {
      IERC20(tokenAddress).approve(spenderAddress, type(uint256).max);
    }
  }

  function _safeTransferFromTokens(
    address token,
    uint256 amount
  ) internal sphereXGuardInternal(0x9ffc4661) returns (uint256) {
    if (IERC20(token).allowance(msg.sender, address(this)) < amount) revert TokenNotApproved();
    uint256 balanceBefore = IERC20(token).balanceOf(address(this));
    IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
    uint256 balanceAfter = IERC20(token).balanceOf(address(this));
    return balanceAfter - balanceBefore;
  }

  /**
   * @notice Divides an amount between two tokens based on their ratio
   * @dev Used to split a single token amount into two token amounts while maintaining their ratio
   * @param amount The total amount to divide
   * @param ratio0 The ratio for the first token
   * @param ratio1 The ratio for the second token
   * @return amount0 The amount allocated to the first token
   * @return amount1 The amount allocated to the second token
   */
  function _divideAmountInRatio(
    uint256 amount,
    uint256 ratio0,
    uint256 ratio1
  ) internal pure returns (uint256, uint256) {
    uint256 totalRatio = ratio0 + ratio1;
    if (totalRatio == 0) revert TotalRatioZero();
    uint256 amount0 = (amount * ratio0) / totalRatio;
    uint256 amount1 = amount - amount0;
    return (amount0, amount1);
  }

  /**
   * @notice Returns any remaining tokens to the caller
   * @param tokens Array of token addresses to check and return
   * @return returnedAssets Array of ReturnedAsset structs containing token addresses and amounts returned
   */
  function _returnAssets(
    address[] memory tokens
  ) internal sphereXGuardInternal(0x65afacc1) returns (ReturnedAsset[] memory returnedAssets) {
    uint256 balance;

    returnedAssets = new ReturnedAsset[](tokens.length);
    for (uint256 i = 0; i < tokens.length; i++) {
      if (tokens[i] == address(0)) continue;
      balance = IERC20(tokens[i]).balanceOf(address(this));
      returnedAssets[i] = ReturnedAsset({tokens: tokens[i], amounts: balance});
      if (balance > 0) {
        if (tokens[i] == address(wrappedNative)) {
          wrappedNative.withdraw(balance);
          (bool success, ) = msg.sender.call{value: balance}(new bytes(0));
          if (!success) revert ETHTransferFailed();
        } else {
          IERC20(tokens[i]).safeTransfer(msg.sender, balance);
        }
      }
    }
  }

  /**
   * @notice Returns any remaining tokens to the caller
   * @param token The token to return
   * @param recipient The address to return the token to
   * @return amount The amount of tokens returned
   */
  function _returnAsset(
    address token,
    address recipient
  ) internal sphereXGuardInternal(0xf45372f8) returns (uint256 amount) {
    amount = IERC20(token).balanceOf(address(this));
    _returnAssetWithAmount(token, recipient, amount);
  }

  /**
   * @notice Returns the amount of tokens to the caller, if the token is wrappedNative, it will be converted to native token
   * @param token The token to return
   * @param recipient The address to return the token to
   * @param amount The amount of tokens to return
   */
  function _returnAssetWithAmount(address token, address recipient, uint256 amount) internal {
    if (amount > 0) {
      if (token == address(wrappedNative)) {
        wrappedNative.withdraw(amount);
        (bool success, ) = recipient.call{value: amount}(new bytes(0));
        if (!success) revert ETHTransferFailed();
      } else {
        IERC20(token).safeTransfer(recipient, amount);
      }
    }
  }

  /**
   * @notice Transfers the fee to the fee recipient
   * @param token The token to transfer
   * @param fee The fee percentage in basis points
   * @param amount The amount of tokens to transfer
   * @return amount The amount of tokens after the fee is transferred
   */
  function _transferFee(address token, uint16 fee, uint256 amount) internal returns (uint256, uint256 feeAmount) {
    if (fee > 0) {
      feeAmount = (amount * fee) / MAX_FEE_BPS;
      _returnAssetWithAmount(token, feeRecipient, feeAmount);
      amount -= feeAmount;
    }
    return (amount, feeAmount);
  }

  /**
   * @notice Converts input token balance of address(this) to vault's desired token
   * @param asset The asset to convert
   * @param tokenIn The input token to convert
   * @return assetsOut Amount of converted assets
   * @return returnedAssets Array of any remaining tokens returned to caller
   */
  function swapToAssets(
    address asset,
    address tokenIn,
    uint256 tokenInAmount,
    address recipient
  ) public virtual returns (uint256 assetsOut, ReturnedAsset[] memory returnedAssets);

  /**
   * @notice Converts vault's desired token balance to output token
   * @param asset The asset to convert
   * @param tokenOut The output token to convert
   * @return tokenOutAmount Amount of converted tokens
   * @return returnedAssets Array of any remaining tokens returned to caller
   */
  function swapFromAssets(
    address asset,
    address tokenOut,
    uint256 assetsInAmount,
    address recipient
  ) public virtual returns (uint256 tokenOutAmount, ReturnedAsset[] memory returnedAssets);

  /**
   * @notice Deposits tokens into a vault after converting them if necessary
   * @param vault Target vault
   * @param tokenIn Input token address
   * @param tokenInAmount Amount of input tokens
   * @param minShares Minimum amount of vault shares to receive
   * @return shares Number of vault shares received
   * @return returnedAssets Array of any remaining tokens returned to caller
   */
  function zapIn(
    IVault vault,
    address tokenIn,
    uint256 tokenInAmount,
    uint256 minShares
  )
    external
    payable
    virtual
    nonReentrant
    sphereXGuardExternal(0x621b094a)
    returns (uint256 shares, ReturnedAsset[] memory returnedAssets)
  {
    // if eth is the tokenIn, we need to convert it to the wrappedNative
    if (tokenIn == address(0)) {
      if (msg.value < MINIMUM_AMOUNT) revert InsufficientInputAmount(address(0), msg.value, MINIMUM_AMOUNT);
      wrappedNative.deposit{value: msg.value}();
      tokenIn = address(wrappedNative);
      tokenInAmount = msg.value;
    } else {
      if (tokenInAmount < MINIMUM_AMOUNT) revert InsufficientInputAmount(tokenIn, tokenInAmount, MINIMUM_AMOUNT);
      tokenInAmount = _safeTransferFromTokens(tokenIn, tokenInAmount);
    }

    // transfer the fee
    uint256 feeAmount;
    (tokenInAmount, feeAmount) = _transferFee(tokenIn, zapInFee, tokenInAmount);

    // convert the input token to the vault's asset if needed
    uint256 assetsIn = tokenInAmount;
    if (vault.asset() != tokenIn) {
      (assetsIn, returnedAssets) = swapToAssets(vault.asset(), tokenIn, tokenInAmount, address(this));
    }

    // approve the asset to the vault
    IERC20(vault.asset()).forceApprove(address(vault), assetsIn);

    // deposit the asset to the vault
    shares = vault.deposit(assetsIn, msg.sender, minShares);
    emit ZapIn(msg.sender, address(vault), tokenIn, tokenInAmount, assetsIn, shares, feeAmount, returnedAssets);
  }

  /**
   * @notice Withdraws from vault and converts to desired token
   * @param vault Source vault
   * @param sharesAmount Amount of vault shares to withdraw
   * @param tokenOut Desired output token
   * @param minTokenOutAmount Minimum amount of desired tokens to receive
   * @return tokenOutAmount Amount of output tokens received
   * @return returnedAssets Array of any remaining tokens returned to caller
   */
  function zapOut(
    IVault vault,
    uint256 sharesAmount,
    address tokenOut,
    uint256 minTokenOutAmount
  )
    external
    virtual
    nonReentrant
    sphereXGuardExternal(0xaf73b205)
    returns (uint256 tokenOutAmount, ReturnedAsset[] memory returnedAssets)
  {
    uint256 assetsOut = IVault(vault).redeem(sharesAmount, address(this), msg.sender);

    // if eth is the desiredToken, we need to convert it to the wrappedNative
    if (tokenOut == address(0)) {
      tokenOut = address(wrappedNative);
    }

    // convert the asset to the desired token if needed
    if (vault.asset() == tokenOut) {
      tokenOutAmount = assetsOut;
    } else {
      (tokenOutAmount, returnedAssets) = swapFromAssets(vault.asset(), tokenOut, assetsOut, address(this));
    }

    // transfer the fee
    uint256 feeAmount;
    (tokenOutAmount, feeAmount) = _transferFee(tokenOut, zapOutFee, tokenOutAmount);

    // return the token
    _returnAsset(tokenOut, msg.sender);

    if (tokenOutAmount < minTokenOutAmount)
      revert InsufficientOutputAmount(tokenOut, tokenOutAmount, minTokenOutAmount);
    emit ZapOut(
      msg.sender,
      address(vault),
      tokenOut,
      tokenOutAmount,
      assetsOut,
      sharesAmount,
      feeAmount,
      returnedAssets
    );
  }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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

-----Decoded View---------------
Arg [0] : devAddress (address): 0x62137cEc7754aA3f530c98866a86dba36d268717
Arg [1] : wrappedNative (address): 0x6969696969696969696969696969696969696969
Arg [2] : stablecoin (address): 0xFCBD14DC51f0A4d49d5E53C2E0950e0bC26d0Dce
Arg [3] : swapRouter (address): 0x252E9B9Dd86AAD41166e682712B75A45Bb779433
Arg [4] : lpRouter (address): 0x944e034B1E3fF30BeCb3661b4960f47DdF14Af3D
Arg [5] : feeRecipient (address): 0x1cfe31Bfa1Ac9b28588C91BB4300A1ED032F069F
Arg [6] : zapInFee (uint16): 0
Arg [7] : zapOutFee (uint16): 0

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 00000000000000000000000062137cec7754aa3f530c98866a86dba36d268717
Arg [1] : 0000000000000000000000006969696969696969696969696969696969696969
Arg [2] : 000000000000000000000000fcbd14dc51f0a4d49d5e53c2e0950e0bc26d0dce
Arg [3] : 000000000000000000000000252e9b9dd86aad41166e682712b75a45bb779433
Arg [4] : 000000000000000000000000944e034b1e3ff30becb3661b4960f47ddf14af3d
Arg [5] : 0000000000000000000000001cfe31bfa1ac9b28588c91bb4300a1ed032f069f
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000000