/**
 * BasicAuthProvider
 *
 * Handles HTTP Basic Authentication.
 * Supports @auth basic directive and Authorization: Basic header.
 */
import { HttpRequest } from '../types';
import { IAuthProvider, AuthContext } from './IAuthProvider';
export declare class BasicAuthProvider implements IAuthProvider {
    readonly name = "basic";
    canHandle(request: HttpRequest): boolean;
    applyAuth(request: HttpRequest, context: AuthContext): Promise<HttpRequest>;
    private getAuthHeader;
    private isBase64Encoded;
    private replaceVariables;
}