import { default as NDK, NDKUser, NDKUserProfile, NDKEvent } from '@nostr-dev-kit/ndk';
export declare class NostrService {
    private static instance;
    private ndk;
    private isConnected;
    private constructor();
    static getInstance(): NostrService;
    connectToNostr(relays?: string[]): Promise<void>;
    /**
     * Get list of relay URLs that are currently connected
     * @returns Array of normalized connected relay URLs (without trailing slashes)
     */
    private getConnectedRelays;
    getRelays(): string[];
    resolveNDKUser(identifier: {
        npub?: string | null;
        nip05?: string | null;
        pubkey?: string | null;
    }): Promise<NDKUser | null>;
    resolveNDKEvent(identifier: {
        hex?: string | null;
    }): Promise<NDKEvent | null>;
    /**
     * Convenience helper to fetch zap count for a profile.
     * It determines the user based on the provided identifier and
     * returns the number of zap receipts found (count, **not** total sats).
     */
    getZapCount(identifier: {
        npub?: string;
        nip05?: string;
        pubkey?: string;
    }): Promise<number>;
    getProfile(user: NDKUser | null): Promise<NDKUserProfile | null>;
    getPost(eventId: string): Promise<NDKEvent | null>;
    fetchFollows(user: NDKUser): Promise<number>;
    fetchFollowers(user: NDKUser): Promise<number>;
    fetchNotesAndReplies(user: NDKUser): Promise<[number, number]>;
    fetchZaps(user: NDKUser): Promise<number>;
    getNDK(): NDK;
    /**
     * Check if a Nostr signer is available
     * @returns boolean indicating if a signer is available
     */
    hasSigner(): boolean;
}