import type { BrowserContext, ConsentState } from "../types.ts";
declare function toEpValue(v: unknown): string | null;
declare function toEpnValue(v: unknown): number | null;
export declare function encodeItemToPrValue(item: unknown): string;
/**
 * Builds the query params for a GA4 gtag `/g/collect` request.
 *
 * This returns a URLSearchParams with already-stringified values. The caller is
 * responsible for attaching it to a URL or sending as body.
 */
export declare function buildGa4CollectQueryParams({ propertyId, eventName, eventParams, cookieHeader, clientId, userId, cookiePrefix, ignoreReferrer, browser, pageLoadMs, hitCounter, engagementTimeMs, uachParams, campaign, contentGroup, consentParams, debugMode, }: {
    propertyId: string;
    eventName: string;
    eventParams: Record<string, unknown>;
    cookieHeader: string;
    clientId: string | null;
    userId: string | null;
    cookiePrefix: string;
    ignoreReferrer: boolean;
    browser: BrowserContext;
    pageLoadMs: number | null;
    hitCounter: number | null;
    engagementTimeMs: number | null;
    uachParams: Record<string, string> | null;
    campaign: {
        campaign_id?: string | null;
        campaign_source?: string | null;
        campaign_medium?: string | null;
        campaign_name?: string | null;
        campaign_term?: string | null;
        campaign_content?: string | null;
    } | null;
    contentGroup: string | null;
    consentParams: {
        gcs?: string | null;
        gcd?: string | null;
        consent?: ConsentState;
    } | null;
    debugMode: boolean;
}): URLSearchParams;
export declare const __internal: {
    ITEM_KEY_MAP: Record<string, string>;
    toEpValue: typeof toEpValue;
    toEpnValue: typeof toEpnValue;
};
export {};