do not force rollback when the list of checkpoints is empty

An empty list basically assumes that there's no checkpoint on the driver, so nothing to rollback.
cardano-foundation · Jun 16, 2020 · 1fab8e5 · 1fab8e5
1 parent 90c9b0c
commit 1fab8e5
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/lib/core/src/Cardano/Wallet/Network.hs b/lib/core/src/Cardano/Wallet/Network.hs
@@ -391,6 +391,8 @@ follow nl tr cps yield header =
             -- initiates the protocol by asking clients to rollback to the last
             -- known intersection.
             case (cursorSlotId nl cursor', cps) of
+                (sl, []) ->
+                    step delay0 cursor'
                 (sl, _:_) | sl == slotId (last cps) ->
                     step delay0 cursor'
                 (sl, _) ->