diff --git a/pkg/config/hardfork_string.go b/pkg/config/hardfork_string.go
index f73923119..48f2349f0 100644
--- a/pkg/config/hardfork_string.go
+++ b/pkg/config/hardfork_string.go
@@ -10,16 +10,26 @@ func _() {
 	var x [1]struct{}
 	_ = x[HFAspidochelone-1]
 	_ = x[HFBasilisk-2]
+	_ = x[hfLast-4]
 }
 
-const _Hardfork_name = "AspidocheloneBasilisk"
+const (
+	_Hardfork_name_0 = "AspidocheloneBasilisk"
+	_Hardfork_name_1 = "hfLast"
+)
 
-var _Hardfork_index = [...]uint8{0, 13, 21}
+var (
+	_Hardfork_index_0 = [...]uint8{0, 13, 21}
+)
 
 func (i Hardfork) String() string {
-	i -= 1
-	if i >= Hardfork(len(_Hardfork_index)-1) {
-		return "Hardfork(" + strconv.FormatInt(int64(i+1), 10) + ")"
+	switch {
+	case 1 <= i && i <= 2:
+		i -= 1
+		return _Hardfork_name_0[_Hardfork_index_0[i]:_Hardfork_index_0[i+1]]
+	case i == 4:
+		return _Hardfork_name_1
+	default:
+		return "Hardfork(" + strconv.FormatInt(int64(i), 10) + ")"
 	}
-	return _Hardfork_name[_Hardfork_index[i]:_Hardfork_index[i+1]]
 }
diff --git a/pkg/core/transaction/witness_scope_string.go b/pkg/core/transaction/witness_scope_string.go
index 805ac1473..f62b96baf 100644
--- a/pkg/core/transaction/witness_scope_string.go
+++ b/pkg/core/transaction/witness_scope_string.go
@@ -30,7 +30,7 @@ var (
 
 func (i WitnessScope) String() string {
 	switch {
-	case 0 <= i && i <= 1:
+	case i <= 1:
 		return _WitnessScope_name_0[_WitnessScope_index_0[i]:_WitnessScope_index_0[i+1]]
 	case i == 16:
 		return _WitnessScope_name_1
diff --git a/pkg/core/transaction/witnessconditiontype_string.go b/pkg/core/transaction/witnessconditiontype_string.go
index 96e0d8a38..bbbc6b378 100644
--- a/pkg/core/transaction/witnessconditiontype_string.go
+++ b/pkg/core/transaction/witnessconditiontype_string.go
@@ -34,7 +34,7 @@ var (
 
 func (i WitnessConditionType) String() string {
 	switch {
-	case 0 <= i && i <= 3:
+	case i <= 3:
 		return _WitnessConditionType_name_0[_WitnessConditionType_index_0[i]:_WitnessConditionType_index_0[i+1]]
 	case 24 <= i && i <= 25:
 		i -= 24
diff --git a/pkg/network/message_string.go b/pkg/network/message_string.go
index 8e516f377..2ebdacd9b 100644
--- a/pkg/network/message_string.go
+++ b/pkg/network/message_string.go
@@ -62,7 +62,7 @@ var (
 
 func (i CommandType) String() string {
 	switch {
-	case 0 <= i && i <= 1:
+	case i <= 1:
 		return _CommandType_name_0[_CommandType_index_0[i]:_CommandType_index_0[i+1]]
 	case 16 <= i && i <= 17:
 		i -= 16