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

import "../../acl/direct/IACL.sol";
import "../Protocol.sol";
import "../../asset/Assets.sol";
import "../../accounting/Accounts.sol";

abstract contract MetahubStorage {
    /**
     * @dev Contract registry (contract key -> contract address).
     */
    mapping(bytes4 => address) internal _contractRegistry;

    /**
     * @dev ACL contract.
     */
    IACL internal _aclContract;

    /**
     * @dev Protocol configuration.
     */
    Protocol.Config internal _protocolConfig;

    /**
     * @dev Asset registry contains the data about all registered assets and supported asset classes.
     */
    Assets.Registry internal _assetRegistry;

    /**
     * @dev Account registry contains the data about participants' accounts and their current balances.
     */
    Accounts.Registry internal _accountRegistry;
}