apollo-server-caching/src/KeyValueCache.ts

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/** Options for {@link KeyValueCache.set} */
export interface KeyValueCacheSetOptions {
  /**
   * Specified in **seconds**, the time-to-live (TTL) value limits the lifespan
   * of the data being stored in the cache.
   */
  ttl?: number | null;
}

export interface KeyValueCache<V = string> {
  get(key: string): Promise<V | undefined>;
  set(key: string, value: V, options?: KeyValueCacheSetOptions): Promise<void>;
  delete(key: string): Promise<boolean | void>;
}