export type MapUpdateHeadersInit = HeadersInit | Record<string, string | string[] | undefined> | Map<string, string | undefined>;
export declare const MAP_UPDATE_TOKEN_HEADER = "x-rpgjs-map-update-token";
export declare const MAP_UPDATE_TOKEN_ENV = "RPGJS_MAP_UPDATE_TOKEN";
export declare function resolveMapUpdateToken(explicitToken?: string): string;
export declare function createMapUpdateHeaders(token?: string, init?: MapUpdateHeadersInit): Headers;
export declare function readMapUpdateToken(headers: Headers): string;
export declare function isMapUpdateAuthorized(headers: Headers, expectedToken?: string): boolean;