import { Payload } from '../saveCustomEvent/generated-types';
export declare function transformCommonFields(payload: Payload): {
    event_id: string;
    event_name: string;
    ip_address: string | undefined;
    user_agent: string | undefined;
    timestamp: string | undefined;
    fbp: string | undefined;
    fbc: string | undefined;
    ga: string | undefined;
    identifiers: {
        name: string;
        value: string;
    }[];
    url: string | undefined;
    client_id: string;
    referrer: string | undefined;
    data: {
        customData: {
            name: string;
            value: unknown;
        }[];
    };
};
