import { NDKPrivateKeySigner } from '@nostr-dev-kit/ndk';
/**
 * Encrypt a private key using a password
 *
 * @param privateKey - The private key to encrypt as Uint8Array
 * @param password - The password to use for encryption
 * @param logn - Scrypt difficulty parameter (default: 16)
 * @param ksb - Key security byte (default: 0x02)
 * @returns - Encrypted key as a bech32-encoded string with 'ncryptsec' prefix
 */
export declare function encrypt(privateKey: Uint8Array, password: string, logn?: number, ksb?: 0x00 | 0x01 | 0x02): string;
/**
 * Decrypt an encrypted private key
 *
 * @param encryptedKey - The encrypted key as a bech32-encoded string
 * @param password - The password used for encryption
 * @returns - Decrypted private key as Uint8Array
 */
export declare function decrypt(encryptedKey: string, password: string): Uint8Array;
/**
 * Encrypt an NDKPrivateKeySigner with a password, returning a NIP-49 encrypted string
 */
export declare function encryptSigner(signer: NDKPrivateKeySigner, password: string): string;
/**
 * Create an NDKPrivateKeySigner from a NIP-49 encrypted key
 */
export declare function decryptToSigner(encryptedKey: string, password: string): NDKPrivateKeySigner;