refactor: split casino.go, dedup helpers, remove audit docs

1 files changed, 14 insertions, 0 deletions

diff --git a/internal/game/money.go b/internal/game/money.go
index 6317df8..6965859 100644
--- a/internal/game/money.go
+++ b/internal/game/money.go
@@ -48,6 +48,20 @@ func removePendingWager(p *player.Player, id string) bool {
 	return removed
 }
 
+// countUniqueNonEmpty returns the number of distinct non-empty IDs in ids.
+// PayCredits/PayPoker use it to fail closed when a payout names a stake that
+// is not present (or names one twice): paying it anyway would double-pay with
+// no ledger entry left for startup recovery.
+func countUniqueNonEmpty(ids []string) int {
+	seen := make(map[string]bool, len(ids))
+	for _, id := range ids {
+		if id != "" {
+			seen[id] = true
+		}
+	}
+	return len(seen)
+}
+
 // takePendingWagers removes and returns the pending stakes whose IDs are
 // listed, leaving the rest. It is used by a settlement that returns a
 // specific set of stakes (a table hand).