/**
 * Nostr service types
 */
export interface NostrEvent {
    id: string;
    pubkey: string;
    created_at: number;
    kind: number;
    tags: string[][];
    content: string;
    sig: string;
}
export interface NostrFilter {
    authors?: string[];
    kinds?: number[];
    limit?: number;
}
/**
 * Encryption version for Nostr direct messages.
 * - 'nip04': Legacy NIP-04 AES-CBC encryption (kind 4). Default for backward compat.
 * - 'nip44': Modern NIP-44 ChaCha20+HMAC encryption (kind 44). Opt-in.
 */
export type EncryptionVersion = 'nip04' | 'nip44';
export interface NostrService {
    sendDirectMessage(pubkey: string, content: string): Promise<NostrEvent>;
    queryEvents(filter: NostrFilter): Promise<NostrEvent[]>;
}