import { BaseObserver, SyncStatus } from '@powersync/common';
import { Mutex, StreamingSyncImplementation, LockOptions } from '@powersync/shared-internals';
export declare class SSRStreamingSyncImplementation extends BaseObserver implements StreamingSyncImplementation {
    syncMutex: Mutex;
    crudMutex: Mutex;
    isConnected: boolean;
    lastSyncedAt?: Date | undefined;
    constructor();
    obtainLock<T>(lockOptions: LockOptions<T>): Promise<T>;
    /**
     * This is a no-op in SSR mode
     */
    connect(): Promise<void>;
    dispose(): Promise<void>;
    /**
     * This is a no-op in SSR mode
     */
    disconnect(): Promise<void>;
    /**
     * This SSR Mode implementation is immediately ready.
     */
    waitForReady(): Promise<void>;
    /**
     * This will never resolve in SSR Mode.
     */
    waitUntilStatusMatches(_predicate: (status: SyncStatus) => boolean): Promise<void>;
    /**
     * This is a no-op in SSR mode.
     */
    triggerCrudUpload(): void;
    /**
     * No-op in SSR mode.
     */
    updateSubscriptions(): void;
    /**
     * No-op in SSR mode.
     */
    markConnectionMayHaveChanged(): void;
    requestCheckpoint(): Promise<bigint>;
}