fix: preserve banked free-spin winnings when a settlement save fails

1 files changed, 13 insertions, 1 deletions

diff --git a/internal/casino/machine.go b/internal/casino/machine.go
index 36576d0..aad6352 100644
--- a/internal/casino/machine.go
+++ b/internal/casino/machine.go
@@ -272,7 +272,6 @@ func (m *Machine) finishSpin() []Event {
 		payNow = 0
 	case featureEnds:
 		payNow = credits + int(m.featureBank)
-		m.featureBank = 0
 	}
 
 	payFailed := false
@@ -290,8 +289,21 @@ func (m *Machine) finishSpin() []Event {
 			failedEvents := m.private(payoutFailedMessage())
 			failedEvents[0].Color = "casino_payout"
 			events = append(events, failedEvents...)
+			if featureEnds && int(m.featureBank) > 0 {
+				bankEvents := m.private("The house could not credit your banked free-spin winnings either; they stay banked and are paid with your next completed free-spin feature, or when the casino closes.")
+				bankEvents[0].Color = "casino_action"
+				events = append(events, bankEvents...)
+			}
 		}
 	}
+	if featureEnds && !payFailed {
+		// The bank is now part of the settled (or absent-wallet) payout. It is
+		// cleared only once the save succeeded, so a failed settlement leaves
+		// the banked winnings on the machine instead of destroying them: the
+		// next free-spin feature pays them again, and shutdown/refund paths
+		// (refundAll, markDisconnected) still settle or report them.
+		m.featureBank = 0
+	}
 	if payNow > 0 && !payFailed {
 		message := fmt.Sprintf("\nYou win %d credits.", payNow)
 		switch {