Merge pull request #6445 from oasisprotocol/martin/fix/storage-committee-prune-handler

go/worker/storage/committee: Fix prune handler

Author: martintomazic

.changelog/6445.bugfix.md

@@ -0,0 +1,4 @@
+go/worker/storage/committee: Fix prune handler
+
+Prune handler had an edge case when State DB was empty,
+which could cause runtime light history to be pruned prematurely.

go/worker/storage/committee/prune.go

@@ -20,6 +20,9 @@ type pruneHandler struct {
 // Implements runtime.history.PruneHandler.
 func (p *pruneHandler) CanPruneRuntime(rounds []uint64) error {
 	lastSycnedRound, _, _ := p.worker.GetLastSynced()
+	if lastSycnedRound == defaultUndefinedRound {
+		return fmt.Errorf("worker/storage: tried to prune past last synced round (empty state db)")
+	}
 
 	for _, round := range rounds {
 		if round >= lastSycnedRound {