import { DefaultKeys, KeyPairOptions, Secp256k1ExtendedKeyPair } from '@bitgo/sdk-core';
/**
 * XRP keys and address management.
 */
export declare class KeyPair extends Secp256k1ExtendedKeyPair {
    /**
     * Public constructor. By default, creates a key pair with a random master seed.
     *
     * @param {KeyPairOptions} source Either a master seed, a private key, or a public key
     */
    constructor(source?: KeyPairOptions);
    /** @inheritdoc */
    getKeys(): DefaultKeys;
    /** @inheritdoc */
    getAddress(): string;
    /**
     * Generates a signature for an arbitrary string with the current private key using keccak256
     * hashing algorithm. Throws if there is no private key.
     *
     * @param {string} message to produce a signature for
     * @returns {Buffer} The signature as a buffer
     */
    signMessage(message: string): Buffer;
    /**
     * Verifies a message signature using the current public key.
     *
     * @param {string} message signed
     * @param {Buffer} signature to verify
     * @returns {boolean} True if the message was signed with the current key pair
     */
    verifySignature(message: string, signature: Buffer): boolean;
}
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