Is there a SHA that's guaranteed to produce a unique hash?

Question

I am looking for a way to hash a user id, obtained from a 3rd party service, such that I can use the hash as a primary key.

My understanding is that the usual SHA-512 style algorithms, given an input string that is guaranteed to be unique, are not guaranteed to produce a hash value that is also guaranteed to be unique.

Is there a hashing algorithm that will produce an unique hash?

More specifically is there such an algorithm supported out of the box by NodeJS 10.9 or better

Answer 1

Length of a SHA-512 hash is 64 bytes(512 bits) long which gives you 10¹⁵⁴ combinations of values. So it has a very less (i mean a very very less ) chance of getting same hash.

How much very less it is, think of the weight of the sun from grams (which is weigh million times like the earch). If any other planet weight 10¹⁵⁴ of grams, not even a millions of millions suns combined can be equals to that amount.

So by very less, it means never. Even the bitcoin addresses are using this method as the wallet address. If you by any chance can find that one combination, you will be a billionaire. I promise