Cache.import returns an Object instead of a Cache

[mhchia]

What's wrong?

rlnjs/src/cache.ts

Lines 109 to 111 in da3fd80

	public static async import(cache: string): Promise<Cache> {
	return JSON.parse(cache) as Cache
	}

As the title, Cache.import is expected to return a Cache object, but it's just a Object now.

How to fix it?

• Still parse cache: string with JSON.parse
• Instantiate a new Cache
• Copy all content in cache to Cache.cache