From d498c26c3fb4597d41472fded46616b428375991 Mon Sep 17 00:00:00 2001
From: Dmitrii Skopintsev <dmtrskv@nil.foundation>
Date: Wed, 25 Jun 2025 18:56:08 +0200
Subject: [PATCH] Panic on concurrent block updates

---
 nil/internal/consensus/ibft/logger.go |  4 ++--
 nil/internal/execution/postprocess.go | 12 +++++++++++-
 nil/services/nilservice/service.go    |  2 +-
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/nil/internal/consensus/ibft/logger.go b/nil/internal/consensus/ibft/logger.go
index 5331bb91b..e45b06afe 100644
--- a/nil/internal/consensus/ibft/logger.go
+++ b/nil/internal/consensus/ibft/logger.go
@@ -7,11 +7,11 @@ type ibftLogger struct {
 }
 
 func (l *ibftLogger) Info(msg string, args ...any) {
-	l.logger.Info().Fields(args).Msg(msg)
+	l.logger.Trace().Fields(args).Msg(msg)
 }
 
 func (l *ibftLogger) Debug(msg string, args ...any) {
-	l.logger.Debug().Fields(args).Msg(msg)
+	l.logger.Trace().Fields(args).Msg(msg)
 }
 
 func (l *ibftLogger) Error(msg string, args ...any) {
diff --git a/nil/internal/execution/postprocess.go b/nil/internal/execution/postprocess.go
index 9a7ba1bb1..997d01887 100644
--- a/nil/internal/execution/postprocess.go
+++ b/nil/internal/execution/postprocess.go
@@ -1,11 +1,13 @@
 package execution
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 
 	"github.com/NilFoundation/nil/nil/common"
 	"github.com/NilFoundation/nil/nil/common/assert"
+	"github.com/NilFoundation/nil/nil/common/check"
 	"github.com/NilFoundation/nil/nil/internal/db"
 	"github.com/NilFoundation/nil/nil/internal/types"
 )
@@ -43,8 +45,16 @@ func (pp *blockPostprocessor) fillLastBlockTable() error {
 }
 
 func (pp *blockPostprocessor) fillBlockHashByNumberIndex() error {
+	key := pp.blockResult.Block.Id.Bytes()
+	value := pp.blockResult.BlockHash.Bytes()
+
+	present, err := pp.tx.GetFromShard(pp.shardId, db.BlockHashByNumberIndex, key)
+	check.PanicIfNot(err == nil || errors.Is(err, db.ErrKeyNotFound))
+	check.PanicIfNotf(err != nil || bytes.Equal(value, present), "block hash by number index already exists: %x != %x",
+		present, value)
+
 	return pp.tx.PutToShard(
-		pp.shardId, db.BlockHashByNumberIndex, pp.blockResult.Block.Id.Bytes(), pp.blockResult.BlockHash.Bytes())
+		pp.shardId, db.BlockHashByNumberIndex, key, value)
 }
 
 func (pp *blockPostprocessor) fillBlockHashAndTransactionIndexByTransactionHash() error {
diff --git a/nil/services/nilservice/service.go b/nil/services/nilservice/service.go
index 530728183..c5a19af62 100644
--- a/nil/services/nilservice/service.go
+++ b/nil/services/nilservice/service.go
@@ -60,7 +60,7 @@ func startRpcServer(
 	httpConfig := &httpcfg.HttpCfg{
 		HttpURL:         addr,
 		HttpCompression: true,
-		TraceRequests:   true,
+		TraceRequests:   false,
 		HTTPTimeouts:    httpcfg.DefaultHTTPTimeouts,
 		HttpCORSDomain:  []string{"*"},
 		KeepHeaders:     []string{"Client-Version", "Client-Type", "X-UID"},