First attempt

Correct way to connect

(defun run-erc ()
  (interactive)
  (erc-tls :server "chat.sr.ht" ;; this is the soju bouncer of sourcehut
           :port 6697
           :nick "cashmere1337" ;; my libera.chat nick
           :user "cashmere/irc.libera.chat@workstation" ;; username displayed in libera.chat (cashmere)
           :password (lambda () (auth-source-pass-get 'secret "irc"))))
 ;; personal access token

Fetch previous messages

/quote CHATHISTORY LATEST #sr.ht * 100

Sources

bouncer-usage - man.sr.ht ~bitfehler/soju (master): contrib/clients.md - sourcehut git