/**
 * Cryptographic utilities for NIP-174
 */
import { Event } from 'nostr-tools';
/**
 * Generates a random key pair
 *
 * @returns Object containing private key and public key
 */
export declare function generateRandomKeyPair(): {
    privateKey: Uint8Array<ArrayBufferLike>;
    publicKey: string;
};
/**
 * Encrypts data using NIP-44
 *
 * @param data - The data to encrypt
 * @param recipientPubkey - Recipient's public key
 * @param senderPrivkey - Sender's private key
 * @returns Encrypted data as string
 */
export declare function encrypt(data: string, recipientPubkey: string, senderPrivkey: Uint8Array): string;
/**
 * Decrypts data using NIP-44
 *
 * @param encryptedData - The encrypted data
 * @param senderPubkey - Sender's public key
 * @param recipientPrivkey - Recipient's private key
 * @returns Decrypted data as string
 */
export declare function decrypt(encryptedData: string, senderPubkey: string, recipientPrivkey: Uint8Array): string;
/**
 * Creates and signs a Nostr event
 *
 * @param kind - Event kind
 * @param content - Event content
 * @param tags - Event tags
 * @param privkey - Private key to sign the event
 * @returns Signed event
 */
export declare function createEvent(kind: number, content: string, tags: string[][], privkey: Uint8Array): Event;
/**
 * Validates a Nostr event
 *
 * @param event - The event to validate
 * @returns True if the event is valid, false otherwise
 */
export declare function validateNostrEvent(event: Event): boolean;