/**
 * Storage Adapter Initialization Helper
 *
 * Initializes storage adapter with repository injection and proper error handling.
 */
import { Repository, type ObjectLiteral } from 'typeorm';
import { StorageAdapter, LoggerService, NAuthConfig } from '../../index';
/**
 * Initialize storage adapter
 *
 * Handles:
 * - Logger injection (if adapter supports it)
 * - Repository injection (for DatabaseStorageAdapter)
 * - Adapter initialization
 * - Fallback to DatabaseStorageAdapter if no adapter provided and repositories available
 * - Error if no adapter and no repositories (prevents unsafe defaults)
 *
 * @param config - NAuth configuration
 * @param rateLimitRepo - RateLimit repository (nullable)
 * @param storageLockRepo - StorageLock repository (nullable)
 * @param logger - Logger instance
 * @returns Initialized StorageAdapter
 * @throws {NAuthException} If no adapter provided and DatabaseStorageAdapter cannot be created
 */
export declare function initStorage(config: NAuthConfig, rateLimitRepo: Repository<ObjectLiteral> | null, storageLockRepo: Repository<ObjectLiteral> | null, logger: LoggerService): Promise<StorageAdapter>;
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