/// <reference types="node" />
import { DataItem } from '../DataItem.js';
import { Tag } from '../tags.js';
export declare abstract class Signer {
    readonly signer?: any;
    readonly publicKey: Buffer;
    readonly signatureType: number;
    readonly signatureLength: number;
    readonly ownerLength: number;
    readonly pem?: string | Buffer;
    abstract sign(message: Uint8Array, _opts?: any): Promise<Uint8Array> | Uint8Array;
    abstract signDataItem?(dataItem: string | Buffer, tags: Tag[]): Promise<DataItem>;
    abstract setPublicKey?(): Promise<void>;
    abstract getAddress?(): Promise<string>;
    static verify(_pk: string | Buffer, _message: Uint8Array, _signature: Uint8Array, _opts?: any): boolean;
}