From 72b2bd1ec5c1399f23d99e8bf9e9299dfd4a8886 Mon Sep 17 00:00:00 2001
From: Ilya Groshev <hdhduudidi@gmail.com>
Date: Wed, 27 May 2026 10:36:09 +0300
Subject: [PATCH] Fix enhance campaign bonus scale and int32 overflow

---
 server/internal/campaign/catalog.go  | 2 +-
 server/internal/campaign/modifier.go | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/server/internal/campaign/catalog.go b/server/internal/campaign/catalog.go
index 75727ab..97b4853 100644
--- a/server/internal/campaign/catalog.go
+++ b/server/internal/campaign/catalog.go
@@ -82,7 +82,7 @@ func loadEnhanceRows() ([]enhanceRow, error) {
 		}
 		rows = append(rows, enhanceRow{
 			effectType:  EnhanceCampaignEffectType(c.EnhanceCampaignEffectType),
-			effectValue: c.EnhanceCampaignEffectValue,
+			effectValue: c.EnhanceCampaignEffectValue / 10,
 			targets:     grp,
 			startMillis: c.StartDatetime,
 			endMillis:   c.EndDatetime,
diff --git a/server/internal/campaign/modifier.go b/server/internal/campaign/modifier.go
index 1cbdc2e..eb9be3f 100644
--- a/server/internal/campaign/modifier.go
+++ b/server/internal/campaign/modifier.go
@@ -10,7 +10,7 @@ func (b RateBonus) Apply(basePermil int32) int32 {
 	if b.override > 0 {
 		base = b.override
 	}
-	return clampPermil(base + b.bonusPermil)
+	return clampPermil(int32(int64(base) + int64(b.bonusPermil)))
 }
 
 type ExpBonus struct {
@@ -18,7 +18,7 @@ type ExpBonus struct {
 }
 
 func (b ExpBonus) Apply(base int32) int32 {
-	return base * (1000 + b.bonusPermil) / 1000
+	return int32(int64(base) * int64(1000+b.bonusPermil) / 1000)
 }
 
 type StaminaMul struct {
@@ -29,7 +29,7 @@ func (m StaminaMul) Apply(base int32) int32 {
 	if m.permil == 1000 {
 		return base
 	}
-	return base * m.permil / 1000
+	return int32(int64(base) * int64(m.permil) / 1000)
 }
 
 type DropRateMul struct {
@@ -37,7 +37,7 @@ type DropRateMul struct {
 }
 
 func (m DropRateMul) Apply(base int32) int32 {
-	return (base*(1000+m.bonusPermil) + 999) / 1000
+	return int32((int64(base)*int64(1000+m.bonusPermil) + 999) / 1000)
 }
 
 type BonusDrop struct {