/// <reference types="node" />
import { Session } from './Session';
import { ServerUser } from './UserPool';
export declare class ServerPasswordChallenge {
    poolname: string;
    user: ServerUser;
    private b;
    private B;
    private verifier;
    constructor(poolname: string, user: ServerUser, b: string | Buffer);
    calculateB(): Buffer;
    getSession(A: string): Session;
}