From c5d1ea2e163172f106183a9d084ff8cbe7cd3315 Mon Sep 17 00:00:00 2001
From: David Florness <david@florness.com>
Date: Sat, 8 May 2021 21:14:09 -0400
Subject: [PATCH] Do not proceed to ballot TUI if we're missing proving keys

---
 cmd/tallyard/main.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/cmd/tallyard/main.go b/cmd/tallyard/main.go
index 6614179..8210086 100644
--- a/cmd/tallyard/main.go
+++ b/cmd/tallyard/main.go
@@ -100,6 +100,13 @@ func main() {
 		// election never started; user likely hit C-c
 		return
 	}
+	for _, joinID := range *el.FinalJoinIDs {
+		voter := el.Joins[joinID]
+		if voter.EvalProvingKey == nil || voter.SumProvingKey == nil {
+			// some proving keys are missing; user likely hit C-c
+			return
+		}
+	}
 	if len(*el.FinalJoinIDs) < 2 {
 		fmt.Println("election has fewer than 2 voters; exiting")
 		return
-- 
2.38.4