I've been building a typescript blossom server although I would be hesitant to call it a reference implementation since it has a lot of extra features https://github.com/hzrd149/blossom-server

nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6 also create a great cli tool for interacting with servers https://git.fiatjaf.com/blossom

There is also a repo I've been keeping track of all the blossom project I know of https://github.com/hzrd149/awesome-blossom

I'm not sure whats with primals blossom server but it does seem to be modifying the blob in some way on the `PUT /upload` endpoint, which its not supposed to do 😞