type SDKOptions = {
    verbose?: boolean;
    host?: string;
};
interface SessionOptions {
    ip_address?: string;
    user_agent?: string;
    session_id?: string;
}
interface SessionIdentity {
    id: string;
    lastIdentifiedAt: string;
    contactId: string;
    createdAt: string;
    updatedAt: string;
    userId: string;
    isBackend: boolean;
    contact?: any;
}
interface Session {
    id: string;
    identityId: string;
    referrer: string | null;
    utmSource: string | null;
    utmMedium: string | null;
    utmCampaign: string | null;
    utmTerm: string | null;
    utmContent: string | null;
    userAgent: string | null;
    device: string | null;
    os: string | null;
    utmParamsExtras: any | null;
    ipAddress: string | null;
    city: string | null;
    region: string | null;
    country: string | null;
    latitude: number | null;
    longitude: number | null;
    createdAt: string;
    identity?: SessionIdentity;
}
export declare class ReteinSDK {
    private public_key;
    private host;
    private identityId;
    private sessionId;
    private distinctId;
    private verbose;
    constructor(public_key: string, options?: SDKOptions);
    static create(public_key: string, options?: SDKOptions): Promise<ReteinSDK>;
    private _retrieveSessionId;
    track(eventName: string, properties?: Record<string, any>): Promise<void>;
    identify(distinctId: string, options?: SessionOptions): Promise<void>;
    /**
     * List the last sessions for a specific identity
     *
     * @param distinctId The distinct ID of the user
     * @param limit Maximum number of sessions to return (between 5-20, default: 5)
     * @returns Object containing array of session objects
     */
    listLastSessions(distinctId: string, limit?: number): Promise<Session[]>;
    updateUser(properties: Record<string, any>): Promise<void>;
    private defaultHeaders;
    private fetchWithRetry;
    private log;
    reset(): void;
}
export default ReteinSDK;