/**
 * Cloudflare R2 Webhook Adapter
 *
 * Handles S3-compatible event notifications from Cloudflare R2 Storage
 *
 * R2 sends notifications for:
 * - s3:ObjectCreated:Put
 * - s3:ObjectCreated:Post
 * - s3:ObjectCreated:Copy
 * - s3:ObjectRemoved:Delete
 *
 * @example
 * ```ts
 * const adapter = new CloudflareR2Webhook({
 *   secret: process.env.R2_WEBHOOK_SECRET!,
 *   signatureMethod: STORAGE_SIGNATURE_METHOD.HmacSha256,
 *   signatureHeader: 'x-r2-signature',
 *   logger,
 * });
 *
 * webhookManager.registerAdapter(adapter);
 * ```
 */
import { BaseWebhookAdapter } from '../base/BaseWebhookAdapter';
import type { StorageWebhookPayload, ProcessedStorageWebhookEvent, R2WebhookPayload, CloudflareR2WebhookConfig } from '@plyaz/types/storage';
import { R2WebhookPayloadSchema } from '@plyaz/types/storage';
/**
 * Cloudflare R2 Webhook Adapter
 *
 * Handles S3-compatible event notifications from Cloudflare R2
 */
export declare class CloudflareR2Webhook extends BaseWebhookAdapter<R2WebhookPayload, typeof R2WebhookPayloadSchema> {
    readonly providerName: string;
    readonly eventType: string;
    readonly schema: typeof R2WebhookPayloadSchema;
    constructor(config: CloudflareR2WebhookConfig);
    /**
     * Process R2 webhook payload
     * R2 sends an array of records (S3-compatible format)
     */
    process(payload: StorageWebhookPayload<R2WebhookPayload>): Promise<ProcessedStorageWebhookEvent[]>;
    /**
     * Process a single R2 event record
     */
    private processRecord;
    /**
     * Extract object key from event
     */
    protected extractObjectKey(event: R2WebhookPayload): string;
    /**
     * Extract bucket from event
     */
    protected extractBucket(event: R2WebhookPayload): string | undefined;
    /**
     * Generate idempotency key
     * Use bucket + object key + eTag for uniqueness
     */
    getIdempotencyKey(payload: StorageWebhookPayload<R2WebhookPayload>): string;
    /**
     * Check if adapter should process this webhook
     */
    shouldProcess(payload: StorageWebhookPayload<unknown>): boolean;
}