QueryClient

new QueryClient(store: CacheStore, observers: ObserverRegistry)

getQueryKey<E extends Endpoint>(endpoint: E, params: unknown): string

invalidateQuery<E extends Endpoint>(endpoint: E, params: unknown): void

invalidateByKey(key: string): void

invalidateByPath(pattern: string | RegExp): void

removeQuery<E extends Endpoint>(endpoint: E, params: unknown): void

removeByKey(key: string): void

getCachedData<E extends Endpoint>(endpoint: E, params: unknown): unknown

setCachedData<E extends Endpoint>(endpoint: E, params: unknown, data: unknown): void

subscribe<E extends Endpoint>(
  endpoint: E,
  params: unknown,
  callback: (entry: CacheEntry) => void
): () => void

class CacheStore {
  get(key: string): CacheEntry | undefined
  set(key: string, partial: Partial<CacheEntry>): void  // merges
  delete(key: string): boolean
  has(key: string): boolean
  entries(): IterableIterator<[string, CacheEntry]>
  keys(): IterableIterator<string>
  values(): IterableIterator<CacheEntry>
  size: number
  clear(): void
}

class ObserverRegistry {
  subscribe(key: string, callback: Callback): Unsubscribe
  notify(key: string, entry: CacheEntry): void
  subscribeAll(callback: GlobalNotifyCallback): Unsubscribe
  getObserverCount(key: string): number
  keys(): IterableIterator<string>
  size: number
  clear(key: string): void
  clearAll(): void
}

type Callback             = (entry: CacheEntry) => void
type Unsubscribe          = () => void
type GlobalNotifyCallback = (key: string, entry: CacheEntry) => void