import type { RequestParameters, ResourceType } from 'maplibre-gl';
export type RequestResourceType = 'metadata' | 'tile';
export type TransformedRequest = {
    url?: string;
    headers?: Record<string, string>;
    credentials?: RequestCredentials;
};
/**
 * Given a URL, decide how the request for it should actually be made - e.g. attaching an
 * Authorization header, or opting into cookies via `credentials: 'include'`, for a resource that
 * needs authorization. Returning undefined leaves the request as-is.
 *
 * Mirrors MapLibre's own transformRequest, so one function can drive both: a Resource's own
 * fetches, and - once its previewer attaches to a map - MapLibre's own tile and style requests.
 * Synchronous, unlike MapLibre's: it has to run inline as the user pans and zooms, so a token or
 * other credential it needs should already be in hand by the time it's given to a Resource,
 * rather than fetched on demand here.
 *
 * A transform that attaches credentials should still check the URL - MapLibre calls the same
 * function for a basemap's own style, glyphs and sprites, which are a different, unrelated origin.
 */
export type RequestTransform = (url: string, resourceType: RequestResourceType) => TransformedRequest | undefined;
export declare function resolveRequest(url: string, resourceType: RequestResourceType, transform?: RequestTransform): {
    url: string;
    init?: RequestInit;
};
export declare function ourResourceType(maplibreType?: ResourceType): RequestResourceType;
export declare function toMapLibreRequest(transformed: TransformedRequest | undefined, url: string): RequestParameters | undefined;