import type { SyncQueueInput, SyncQueueItem, SyncQueueStats, SyncQueueStorage, SyncState } from "./types";
/**
 * IndexedDB implementation of SyncQueueStorage for browser environments.
 */
export declare class IndexedDbSyncQueue implements SyncQueueStorage {
    private dbName;
    private db;
    private dbPromise;
    /**
     * Create a new IndexedDB sync queue.
     * @param accountId - Unique identifier for the account (e.g., address, pubkey hash)
     */
    constructor(accountId: string);
    private getDb;
    enqueue(items: SyncQueueInput[]): Promise<void>;
    claim(count?: number): Promise<Map<string, SyncQueueItem[]>>;
    private getPendingByTxid;
    private markProcessing;
    complete(id: string): Promise<void>;
    completeMany(ids: string[]): Promise<void>;
    fail(id: string, error: string): Promise<void>;
    getByTxid(txid: string): Promise<SyncQueueItem[]>;
    getByStatus(status: SyncQueueItem["status"], limit?: number): Promise<SyncQueueItem[]>;
    getStats(): Promise<SyncQueueStats>;
    getState(): Promise<SyncState>;
    setState(state: Partial<SyncState>): Promise<void>;
    resetProcessing(): Promise<number>;
    clear(): Promise<void>;
    close(): Promise<void>;
}