// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import "@openzeppelin/contracts/interfaces/IERC165.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IAssetVault is IERC165 {
    /**
     * @dev Thrown when the asset is not is found among vault inventory.
     */
    error AssetNotFound();

    /**
     * @dev Thrown when the function is called on the vault in recovery mode.
     */
    error VaultIsInRecoveryMode();

    /**
     * @dev Thrown when the asset return is not allowed, due to the vault state or the caller permissions.
     */
    error AssetReturnIsNotAllowed();

    /**
     * @dev Thrown when the asset deposit is not allowed, due to the vault state or the caller permissions.
     */
    error AssetDepositIsNotAllowed();

    /**
     * @dev Emitted when the vault is switched to recovery mode by `account`.
     */
    event RecoveryModeActivated(address account);

    /**
     * @dev Activates asset recovery mode.
     * Emits a {RecoveryModeActivated} event.
     */
    function switchToRecoveryMode() external;

    /**
     * @notice Send ERC20 tokens to an address.
     */
    function withdrawERC20Tokens(
        IERC20 token,
        address to,
        uint256 amount
    ) external;

    /**
     * @dev Pauses the vault.
     */
    function pause() external;

    /**
     * @dev Unpauses the vault.
     */
    function unpause() external;

    /**
     * @dev Returns vault asset class.
     * @return Asset class ID.
     */
    function assetClass() external pure returns (bytes4);

    /**
     * @dev Returns the Metahub address.
     */
    function metahub() external view returns (address);

    /**
     * @dev Returns vault recovery mode flag state.
     * @return True when the vault is in recovery mode.
     */
    function isRecovery() external view returns (bool);
}