import { Resource, ContextWrapped, CookieJar, AuthenticationError, AuthenticationService as AuthenticationServiceBase, AuthenticationMachineState, AuthenticationServiceOptions, AuthenticationMachineInput, User } from 'wirejs-resources';
export declare function hasNonEmptyString(o: any, k: string): boolean;
export declare class AuthenticationService extends AuthenticationServiceBase {
    #private;
    constructor(scope: Resource | string, id: string, options?: AuthenticationServiceOptions);
    getMachineState(cookies: CookieJar): Promise<AuthenticationMachineState>;
    missingFieldErrors<T extends Record<string, string | number | boolean>>(input: T, fields: (keyof T & string)[]): AuthenticationError[] | undefined;
    setMachineState(cookies: CookieJar, form: AuthenticationMachineInput): Promise<AuthenticationMachineState | {
        errors: AuthenticationError[];
    }>;
    buildApi(): ContextWrapped<{
        getState: () => Promise<AuthenticationMachineState>;
        setState: (options: AuthenticationMachineInput) => Promise<AuthenticationMachineState | {
            errors: AuthenticationError[];
        }>;
        getCurrentUser: () => Promise<User | null>;
        requireCurrentUser: () => Promise<User>;
    }>;
}