import { KeyPair } from "../types/keys.js";
/**
 * Derives a public key from a private key
 * @param {string} privateKey - The hex-encoded private key
 * @returns {string} The hex-encoded public key
 * @example
 * const pubkey = getPublicKey("1234567890abcdef...");
 * console.log(pubkey); // hex public key
 */
export declare function getPublicKey(privateKey: string): string;
/**
 * Creates a key pair from a hex private key
 * @param {string} privateKeyHex - The hex-encoded private key
 * @returns {KeyPair} A key pair containing private and public keys in various formats
 * @throws {Error} If the private key is invalid
 * @example
 * const keyPair = fromHex("1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef");
 * console.log(keyPair.publicKey); // corresponding public key
 * console.log(keyPair.nsec);      // bech32 nsec private key
 * console.log(keyPair.npub);      // bech32 npub public key
 */
export declare function fromHex(privateKeyHex: string): KeyPair;
/**
 * Generates a new key pair with a random seed phrase
 * @returns {KeyPair} A new key pair containing private and public keys in various formats
 * @example
 * const keyPair = generateKeyPairWithSeed();
 * console.log(keyPair.seedPhrase); // random seed phrase
 * console.log(keyPair.privateKey);  // hex private key
 * console.log(keyPair.publicKey);   // hex public key
 */
export declare function generateKeyPairWithSeed(): KeyPair;
/**
 * Converts a BIP39 seed phrase to a Nostr key pair
 * @param {string} seedPhrase - The BIP39 seed phrase to convert
 * @returns {KeyPair} A key pair containing private and public keys in various formats
 * @throws {Error} If the seed phrase is invalid or key generation fails
 * @example
 * const keyPair = seedPhraseToKeyPair("witch collapse practice feed shame open despair creek road again ice least");
 * console.log(keyPair.privateKey); // hex private key
 * console.log(keyPair.publicKey);  // hex public key
 * console.log(keyPair.nsec);       // bech32 nsec private key
 * console.log(keyPair.npub);       // bech32 npub public key
 */
export declare function seedPhraseToKeyPair(seedPhrase: string): KeyPair;
/**
 * Converts a BIP39 seed phrase to a private key
 * @param {string} seedPhrase - The BIP39 seed phrase to convert
 * @returns {string} The hex-encoded private key
 * @throws {Error} If the seed phrase is invalid
 * @example
 * const privateKey = seedPhraseToPrivateKey("witch collapse practice feed shame open despair creek road again ice least");
 * console.log(privateKey); // hex private key
 */
export declare function seedPhraseToPrivateKey(seedPhrase: string): string;