/**
 * Supabase Storage Webhook Adapter
 *
 * Handles webhook events from Supabase Storage
 *
 * Supabase Storage emits events via Database Webhooks for:
 * - INSERT on storage.objects table (object created)
 * - UPDATE on storage.objects table (object updated)
 * - DELETE on storage.objects table (object deleted)
 *
 * @example
 * ```ts
 * const adapter = new SupabaseStorageWebhook({
 *   secret: process.env.SUPABASE_WEBHOOK_SECRET!,
 *   signatureMethod: STORAGE_SIGNATURE_METHOD.HmacSha256,
 *   signatureHeader: 'x-supabase-signature',
 *   logger,
 * });
 *
 * webhookManager.registerAdapter(adapter);
 * ```
 */
import { BaseWebhookAdapter } from '../base/BaseWebhookAdapter';
import type { StorageWebhookPayload, ProcessedStorageWebhookEvent, SupabaseWebhookPayload, SupabaseStorageWebhookConfig } from '@plyaz/types/storage';
import { SupabaseWebhookPayloadSchema } from '@plyaz/types/storage';
/**
 * Supabase Storage Webhook Adapter
 *
 * Handles database webhooks from Supabase Storage (storage.objects table)
 */
export declare class SupabaseStorageWebhook extends BaseWebhookAdapter<SupabaseWebhookPayload, typeof SupabaseWebhookPayloadSchema> {
    readonly providerName: string;
    readonly eventType: string;
    readonly schema: typeof SupabaseWebhookPayloadSchema;
    constructor(config: SupabaseStorageWebhookConfig);
    /**
     * Process Supabase webhook payload
     */
    process(payload: StorageWebhookPayload<SupabaseWebhookPayload>): Promise<ProcessedStorageWebhookEvent[]>;
    /**
     * Process a single Supabase event
     */
    private processEvent;
    /**
     * Map Supabase event type to storage event and operation
     */
    private mapEventType;
    /**
     * Extract object key from event
     */
    protected extractObjectKey(event: SupabaseWebhookPayload): string;
    /**
     * Extract bucket from event
     */
    protected extractBucket(event: SupabaseWebhookPayload): string | undefined;
    /**
     * Generate idempotency key
     * Use object ID + event type for uniqueness
     */
    getIdempotencyKey(payload: StorageWebhookPayload<SupabaseWebhookPayload>): string;
    /**
     * Check if adapter should process this webhook
     */
    shouldProcess(payload: StorageWebhookPayload<unknown>): boolean;
}