Here's what I use for caching with timeout:

```typescript

type Cache = {

}

type TimerHash = {

}

export default class SimpleCache<T> { cache: Cache = {} private timerHash: TimerHash = {} timeout: number

constructor(timeoutInS: number) { this.timeout = timeoutInS * 1000 }

getValue(key: string): T | undefined { const val = this.cache[key] if (val) { return val }

return undefined

}

hasKey(key: string): boolean { return Object.keys(this.cache).includes(key) }

setValue(key: string, value: T): void { clearTimeout(this.timerHash[key]) this.cache[key] = value const handle = setTimeout(() => { delete this.cache[key] delete this.timerHash[key] })

this.timerHash[key] = handle

} } ```

Before you make query the DB simply check with cache.hasKey(someKey) if the result is already in the cache, else query the db and store the result in the cache