import { Secp256k1CryptoClient } from '@airgap/coinlib-core/protocols/Secp256k1CryptoClient';
export declare class EthereumCryptoClient extends Secp256k1CryptoClient {
    signMessage(message: string, keypair: {
        privateKey: string;
    }): Promise<string>;
    verifyMessage(message: string, signature: string, publicKey: string): Promise<boolean>;
}