From 07c60a2be02028c7437d68adac247356e9f8d97d Mon Sep 17 00:00:00 2001
From: Bernardo Ramos <bernardo@blocko.io>
Date: Sun, 29 Oct 2023 20:39:12 +0000
Subject: [PATCH] increase max events per txn

---
 contract/vm_callback.go | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/contract/vm_callback.go b/contract/vm_callback.go
index 17958f96a..582289af4 100644
--- a/contract/vm_callback.go
+++ b/contract/vm_callback.go
@@ -56,7 +56,8 @@ var (
 )
 
 const (
-	maxEventCnt       = 50
+	maxEventCntV2     = 50
+	maxEventCntV4     = 128
 	maxEventNameSize  = 64
 	maxEventArgSize   = 4096
 	luaCallCountDeduc = 1000
@@ -68,6 +69,14 @@ func init() {
 	zeroBig = types.NewZeroAmount()
 }
 
+func maxEventCnt(ctx *vmContext) int32 {
+	if ctx.blockInfo.ForkVersion >= 4 {
+		return maxEventCntV4
+	} else {
+		return maxEventCntV2
+	}
+}
+
 func addUpdateSize(ctx *vmContext, updateSize int64) error {
 	if ctx.IsGasSystem() {
 		return nil
@@ -1324,8 +1333,8 @@ func luaEvent(L *LState, service C.int, eventName *C.char, args *C.char) *C.char
 	if ctx.isQuery == true || ctx.nestedView > 0 {
 		return C.CString("[Contract.Event] event not permitted in query")
 	}
-	if ctx.eventCount >= maxEventCnt {
-		return C.CString(fmt.Sprintf("[Contract.Event] exceeded the maximum number of events(%d)", maxEventCnt))
+	if ctx.eventCount >= maxEventCnt(ctx) {
+		return C.CString(fmt.Sprintf("[Contract.Event] exceeded the maximum number of events(%d)", maxEventCnt(ctx)))
 	}
 	if len(C.GoString(eventName)) > maxEventNameSize {
 		return C.CString(fmt.Sprintf("[Contract.Event] exceeded the maximum length of event name(%d)", maxEventNameSize))