import { ApiResponse } from './apiResponse';
export interface LookupOptions {
    /** the caller’s phone number */
    callerNumber: string;
    /** the caller’s caller ID */
    callerId?: string;
    /** the callee (the phone number being called) */
    calledNumber?: string;
    /** abandon the request and reject with an error after this amount of time */
    timeoutMs?: number;
}
export interface LookupResult {
    /** true if the request completed successfully; false if an error occurred */
    ok: boolean;
    /**
     * if the record was found, the spam risk level; undefined if the record was not found
     */
    spamRisk?: number;
    /** the complete raw API response */
    raw: ApiResponse;
}
/** Client for the YouMail Spam Caller (Big Data) API. */
export declare class YouMailClient {
    private readonly apiKey;
    private readonly apiSid;
    constructor(apiKey: string, apiSid: string);
    /**
     * Look up details about a phone number using the YouMail Spam Caller API.
     * @param options A LookupOptions object. For convenience, if you are only passing in
     *  the callerNumber, you can pass that as a string instead of a LookupOptions object.
     */
    lookup(options: LookupOptions | string): Promise<LookupResult>;
}