You can now type accounts.

src/clj/auto_ap/datomic/migrate/add_general_ledger.clj

@@ -64,6 +64,12 @@
      :db/doc "Location of the entry"}]
    ]
   )
+(def add-transaction-account
+  [[{:db/ident :transaction/account
+     :db/valueType :db.type/ref
+     :db/cardinality :db.cardinality/one
+     :db/doc "The debit/credit for this transaction"}]])
+
 (def add-accounts
   [[
     {:db/ident :account/code