fix: harden engine across casino, economy, concurrency, security, and content

1 files changed, 0 insertions, 16 deletions

diff --git a/internal/casino/credits.go b/internal/casino/credits.go
index 2b4e2d7..8b7cb7a 100644
--- a/internal/casino/credits.go
+++ b/internal/casino/credits.go
@@ -30,22 +30,6 @@ var (
 	ErrWalletPersistence = errors.New("wallet persistence failure")
 )
 
-// AddCredits adds two balances with an explicit cap, reporting overflow.
-// A negative addend is rejected (payouts never decrease a balance).
-func AddCredits(a, b int) (int, error) {
-	if b < 0 {
-		return a, errors.New("negative credit add")
-	}
-	sum := a + b
-	if b > 0 && sum < a || a > 0 && sum < b {
-		return MaxCredits, fmt.Errorf("credit overflow: %d + %d exceeds %d", a, b, MaxCredits)
-	}
-	if sum > MaxCredits {
-		return MaxCredits, fmt.Errorf("credit overflow: %d + %d exceeds %d", a, b, MaxCredits)
-	}
-	return sum, nil
-}
-
 // MulPayout scales an amount by a payout multiplier and converts to whole
 // credits (floor, like a house paying in chips). Overflow past MaxCredits
 // is an error, not a silent wrap. A non-finite or negative multiplier is