/**
 * Backend Event Persistence Handler
 *
 * Scalable pattern for handling event-to-DB persistence.
 * Registers event handlers that persist data to the database when events fire.
 *
 * Features:
 * - Dynamic repository and mapper loading (avoids circular deps)
 * - Deduplication via unique constraints
 * - Bulk event support
 * - Configurable per-domain
 *
 * @example
 * ```typescript
 * // Register file upload persistence
 * BackendEventPersistenceHandler.register({
 *   domain: 'files',
 *   events: {
 *     'files:upload:uploaded': {
 *       extractPayload: (p) => p.result,
 *       isBulk: false,
 *     },
 *     'files:upload:bulk:uploaded': {
 *       extractPayload: (p) => p.result?.results ?? [],
 *       isBulk: true,
 *     },
 *   },
 *   loadDependencies: async () => ({
 *     repository: FilesRepository.create(),
 *     mapper: FilesMapper,
 *   }),
 *   mapToDbRow: (mapper, item) => mapper.toDbRow(item),
 * });
 * ```
 */
import type { DomainPersistenceConfig } from '@plyaz/types/core';
/**
 * Backend Event Persistence Handler
 *
 * Manages event subscriptions for persisting data to the database.
 * Provides a scalable, reusable pattern for all domains.
 */
export declare class BackendEventPersistenceHandler {
    private static registeredDomains;
    private static cleanupFns;
    /**
     * Register event persistence for a domain
     */
    static register<TRepository, TMapper, TItem, TDbRow>(config: DomainPersistenceConfig<TRepository, TMapper, TItem, TDbRow>): void;
    /**
     * Persist a single item to the database
     */
    private static persistSingle;
    /**
     * Persist multiple items to the database
     */
    private static persistBulk;
    /**
     * Check if error is a duplicate key/unique constraint error
     */
    private static isDuplicateError;
    /**
     * Unregister all event persistence handlers
     */
    static unregisterAll(): void;
    /**
     * Check if a domain is registered
     */
    static isRegistered(domain: string): boolean;
    /**
     * Get list of registered domains
     */
    static getRegisteredDomains(): string[];
}
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