Clojurians Log v2

I am trying to understand how the new store refs work.

(let [id (blob/blob-id bytes)]                   ;; content hash — see below
  (guard/with-unreferenced-writes store-id       ;; see "the write window" below
    (k/bassoc store id bytes {:sync? true})
    (d/transact conn [{:issue/title "crash" :issue/attachment id}])))

In this example, the store-id is the id I pass in the config of dathike. Where do I get the store? If I want to reuse the konserve store of the database itself, how do I get the store? Is there a blob helper that creates hashes? Where is blob/blob-id defined in? Thanks!