import type { SyncQueueInput, SyncQueueItem, SyncQueueItemStatus, SyncQueueStats, SyncQueueStorage, SyncState } from "./types";
/**
 * Generic interface for SQLite database (works with better-sqlite3 and bun:sqlite)
 */
interface SqliteDatabase {
    exec(sql: string): void;
    prepare(sql: string): SqliteStatement;
    close(): void;
}
interface SqliteStatement {
    run(...params: unknown[]): {
        changes: number;
    };
    get(...params: unknown[]): unknown;
    all(...params: unknown[]): unknown[];
}
/**
 * SQLite implementation of SyncQueueStorage for Node/Bun environments.
 *
 * Works with both `better-sqlite3` (Node) and `bun:sqlite` (Bun).
 */
export declare class SqliteSyncQueue implements SyncQueueStorage {
    private db;
    /**
     * Create a new SQLite sync queue.
     * @param db - SQLite database instance (from better-sqlite3 or bun:sqlite)
     */
    constructor(db: SqliteDatabase);
    /**
     * Create and open a SQLite database for an account.
     * Helper for common use case.
     *
     * @param accountId - Unique identifier for the account (e.g., address, pubkey hash)
     * @param dataDir - Directory for database files
     * @param Database - SQLite Database constructor (e.g., from better-sqlite3 or bun:sqlite)
     */
    static create(accountId: string, dataDir: string, Database: new (path: string) => any): SqliteSyncQueue;
    private initialize;
    enqueue(items: SyncQueueInput[]): Promise<void>;
    claim(count?: number): Promise<Map<string, SyncQueueItem[]>>;
    complete(id: string): Promise<void>;
    completeMany(ids: string[]): Promise<void>;
    fail(id: string, error: string): Promise<void>;
    getByTxid(txid: string): Promise<SyncQueueItem[]>;
    getByStatus(status: SyncQueueItemStatus, 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>;
    private rowToItem;
}
export {};