I've got some questions arising from trying to understand how biff/submit-tx works (apologies if my way of referring to things is a bit rough (/ non-standard?)): 1. https://github.com/jacobobryant/biff/blob/master/src/com/biffweb.clj#L702-L710: what is the point of the destructuring of ctx? The function body is simply (bxt/submit-tx ctx biff-tx). Is anything done with the destructured retry and node? I see the same thing with https://github.com/jacobobryant/biff/blob/master/src/com/biffweb.clj#L673-L690 as well. 2. is com.biffweb/biff-tx->xt at https://github.com/jacobobryant/biff/blob/master/src/com/biffweb.clj#L673 used? I see that com.biffweb/submit-tx calls com.biffweb.impl.xtdb/submit-tx, which then calls its own separate biff-tx->xt function I'm providing the code inline here for easy viewing:

;; com.biffweb

(defn biff-tx->xt ;; L673-690
  "Converts the given Biff transaction into an XT transaction.

  The elements of biff-tx may be maps (in which case they are treated as Biff
  operations) or vectors (in which case they are treated as XT operations). For
  example:

  [{:db/doc-type :user
    :xt/id #uuid \"...\"
    :user/name \"example\"}
   [:xtdb.api/put {:xt/id #uuid \"...\"}]]

  biff-tx may optionally be a function which takes ctx and returns a Biff
  transaction.

  See ."
  [{:keys [biff/now biff/db biff/malli-opts] :as ctx} biff-tx]
  (bxt/biff-tx->xt ctx biff-tx))

;; ...

(defn submit-tx ;; L702-710
  "High-level wrapper over xtdb.api/submit-tx. See biff-tx->xt.

  If retry is true, the transaction will be passed to submit-with-retries."
  [{:keys [biff.xtdb/retry biff.xtdb/node]
    :or {retry true}
    :as ctx}
   biff-tx]
  (bxt/submit-tx ctx biff-tx))