import type { StateVersion } from './types.js';
import type { FileSystem } from '../types.js';
import Logger from '@matrixai/logger';
import { createDestroyStartStop } from '@matrixai/async-init';
import { RWLockWriter } from '@matrixai/async-locks';
interface Schema extends createDestroyStartStop.CreateDestroyStartStop {
}
declare class Schema {
    static createSchema({ statePath, stateVersion, fs, logger, fresh, }: {
        statePath: string;
        stateVersion?: StateVersion;
        fs?: FileSystem;
        logger?: Logger;
        fresh?: boolean;
    }): Promise<Schema>;
    readonly statePath: string;
    readonly stateVersionPath: string;
    readonly stateVersion: StateVersion;
    protected lock: RWLockWriter;
    protected fs: FileSystem;
    protected logger: Logger;
    constructor({ statePath, stateVersion, fs, logger, }: {
        statePath: string;
        stateVersion?: StateVersion;
        fs: FileSystem;
        logger?: Logger;
    });
    start({ fresh, }?: {
        fresh?: boolean;
    }): Promise<void>;
    stop(): Promise<void>;
    destroy(): Promise<void>;
    readVersion(): Promise<StateVersion | undefined>;
    protected writeVersion(stateVersion: StateVersion): Promise<void>;
    /**
     * This is only called when the version is older.
     */
    protected upgradeVersion(_stateVersion: StateVersion): Promise<void>;
}
export default Schema;