import * as NodeRSA from 'node-rsa';
import { Data, Encoding } from 'node-rsa';
import { OperatorFunction } from 'rxjs';
import { Buffer } from 'buffer';
export declare const encryptPrivate: <T, R>(data: Data | Buffer, encoding?: 'buffer' | Encoding, sourceEncoding?: Encoding) => OperatorFunction<NodeRSA, R>;