/// <reference types="node" />
/**
 * @description Calculates the address from a given public key
 * @param {Buffer} publicKey - Public key from which we're going to calculate the address for
 * @returns {Buffer} - Address buffer.
 */
export declare function addressFromPublickey(publicKey: Buffer): Buffer;
/**
 * Extracts the public key from a 64-byte long ed25519 private key
 * @param {Buffer} privateKey - Private key buffer.
 * @returns {Buffer} - Public Key buffer.
 */
export declare function publicKeyFromPrivate(privateKey: Buffer): Buffer;
/**
 * Validates an ed25519 private key structure
 * @param {Buffer} privateKey - Private key buffer.
 * @returns {boolean} - True or false if the private key is valid.
 */
export declare function validatePrivateKey(privateKey: Buffer): boolean;
/**
 * Validates the address for a hex string encoded representing an ed25519 keypair
 * @param {string} addressHex - Address hex.
 * @returns {Error | undefined} - Address buffer.
 */
export declare function validateAddressHex(addressHex: string): Error | undefined;
/**
 * Validates an ed25519 public key structure
 * @param {Buffer | string} pubKey - Public key buffer or string.
 * @returns {boolean} - True or false if the public key is valid.
 */
export declare function validatePublicKey(pubKey: Buffer | string): boolean;