/**
 * Shared utilities used by BOTH widget API surfaces:
 *   - lib/widget-api-client.ts (the standalone RegnaClient object)
 *   - provider/api-client.ts (the RegnaApiClient class with auth-failure routing)
 *
 * Lives in lib/ rather than provider/ so widget-api-client.ts can keep
 * its existing imports unchanged. provider/api-client.ts imports from
 * here too to avoid the appearance of a circular import (the runtime
 * graph would already be DAG-safe, but consolidating the helpers
 * keeps maintainability uncomplicated and makes future changes
 * single-source-of-truth).
 */
/** Snake_case to camelCase recursive - used to normalize API payloads
 *  at the edge of the widget data layer. */
export declare function toCamel(obj: unknown): unknown;
/** UTM tags appended to every outgoing widget API call so backend
 *  access logs can attribute traffic to embedded widgets vs. direct
 *  API consumers. */
export declare const WIDGET_UTM: {
    readonly utm_source: "widget";
    readonly utm_medium: "embed";
};
/** Append the WIDGET_UTM tags to a URL string and return the result. */
export declare function withWidgetUtm(url: string): string;
/** Append the WIDGET_UTM tags to a URL object in place and return it. */
export declare function appendWidgetUtm(url: URL): URL;
/** Public-mode path rewrite: when public mode is on the widget calls
 *  hit /v1/public/companies/{id}/... instead of /v1/se/companies/{id}/...
 *  Mirror endpoint exists for SE only today; US/NO pass through and
 *  return 404 from the public mirror just as they would from the
 *  authed surface.
 *
 *  Issue #291 narrow exception: the US similar endpoint has its own
 *  jurisdiction-namespaced public mirror at
 *  ``/public/us/companies/{cik}/similar`` (added by PR #282). The
 *  generic ``/public/companies/{id}/similar`` mirror does an org_number
 *  lookup that 404s on a 10-digit CIK, so US public-mode similar calls
 *  must route to the US-namespaced path. The query string (e.g.
 *  ``?global=true``) is preserved verbatim - the rewriter only touches
 *  the path component. */
export declare function rewriteForPublicMode(path: string, publicMode: boolean): string;
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