export interface KeyPair {
    nsec: string;
    npub: string;
    privateKeyHex: string;
    publicKeyHex: string;
}
export interface KeyPairWithSeed extends KeyPair {
    seedPhrase: string;
}
export declare class NostrSeedPhrase {
    /**
     * Convert a Nostr nsec private key to a BIP39 seed phrase
     * @param nsec - The nsec private key to convert
     * @returns Object containing the seed phrase and original nsec
     */
    static nsecToSeed(nsec: string): {
        seedPhrase: string;
    };
    /**
     * Convert a BIP39 seed phrase to a Nostr nsec private key
     * @param seedPhrase - The BIP39 mnemonic seed phrase
     * @returns Object containing the nsec private key and original seed phrase
     */
    static seedToNsec(seedPhrase: string): KeyPair;
    /**
     * Validate a BIP39 seed phrase
     * @param seedPhrase - The seed phrase to validate
     * @returns boolean indicating if the seed phrase is valid
     */
    static validateSeedPhrase(seedPhrase: string): boolean;
    /**
     * Generate a new Nostr key pair with corresponding seed phrase
     * @returns Object containing the new nsec private key, npub public key, and seed phrase
     */
    static generateNew(): KeyPairWithSeed;
    /**
     * Create a key pair from a hex private key
     * @param privateKeyHex - The hex private key to convert
     * @returns Object containing the nsec, npub, and hex versions of the keys
     */
    static fromHex(privateKeyHex: string): KeyPair;
    /**
     * Convert an nsec to its hex representation
     * @param nsec - The nsec to convert
     * @returns The hex private key
     */
    static nsecToHex(nsec: string): string;
    /**
     * Convert an npub to its hex representation
     * @param npub - The npub to convert
     * @returns The hex public key
     */
    static npubToHex(npub: string): string;
    /**
     * Convert a hex public key to npub format
     * @param publicKeyHex - The hex public key to convert
     * @returns The npub
     */
    static hexToNpub(publicKeyHex: string): string;
    /**
     * Convert a hex private key to nsec format
     * @param privateKeyHex - The hex private key to convert
     * @returns The nsec
     */
    static hexToNsec(privateKeyHex: string): string;
}