Create reconciliation transaction.

app/Repositories/Account/AccountRepositoryInterface.php

@@ -109,6 +109,15 @@ interface AccountRepositoryInterface
      */
     public function getCashAccount(): Account;
 
+    /**
+     * Find or create the opposing reconciliation account.
+     *
+     * @param Account $account
+     *
+     * @return Account|null
+     */
+    public function getReconciliation(Account $account): ?Account;
+
     /**
      * Returns the date of the very last transaction in this account.
      *