/// <reference types="node" />
import { ISignService } from './types';
export declare class SignService implements ISignService {
    private readonly privateKey;
    private readonly keyId;
    constructor(privateKey: Buffer, keyId: string);
    protected getDateString(): string;
    signRequest(payload: string, requestPath: string): {
        signature: string;
        dateString: string;
    };
    getKeyId(): string;
}