fix: atomic saves, casino RNG/config isolation, tick lifecycle

1 files changed, 6 insertions, 1 deletions

diff --git a/internal/casino/slots.go b/internal/casino/slots.go
index aba8f91..c519293 100644
--- a/internal/casino/slots.go
+++ b/internal/casino/slots.go
@@ -234,10 +234,15 @@ func ScaleToRTP(profile SlotProfile, target float64) SlotProfile {
 		return profile
 	}
 	scale := target / actual
+	// SlotProfile is a value API, but its slice and paytable maps are shared
+	// references. Clone both so tuning one machine cannot retune another.
+	profile.Symbols = append([]SlotSymbol(nil), profile.Symbols...)
 	for i := range profile.Symbols {
+		payouts := make(map[int]float64, len(profile.Symbols[i].Payout))
 		for length, payout := range profile.Symbols[i].Payout {
-			profile.Symbols[i].Payout[length] = payout * scale
+			payouts[length] = payout * scale
 		}
+		profile.Symbols[i].Payout = payouts
 	}
 	profile.TargetRTP = target
 	return profile