import { Base64 } from "../Base64";
export declare abstract class Base {
    sign(data: Uint8Array): Promise<Uint8Array>;
    sign(data: string): Promise<Base64>;
    protected abstract signBinary(data: Uint8Array): Promise<Uint8Array>;
    verify(data: string | Uint8Array, signature: Base64 | Uint8Array): Promise<boolean>;
    protected abstract verifyBinary(data: Uint8Array, signature: Uint8Array): Promise<boolean>;
}