/** A value that survives a JSON round trip unchanged. */
export type JsonValue = null | boolean | number | string | JsonValue[] | {
    [key: string]: JsonValue;
};
/**
 * JSON with object keys sorted at every depth, so two structurally equal
 * values produce the same string and therefore the same hash.
 *
 * Arrays keep their order — order is meaningful there. An `undefined` object
 * property is dropped and an `undefined` array element becomes `null`, which
 * is what `JSON.stringify` does; callers that must distinguish "absent" from
 * "present and undefined" cannot rely on this.
 */
export declare function canonicalize(value: unknown): string;