From 8f2a9f048acc15f9fdc8fdbd46ee599968562595 Mon Sep 17 00:00:00 2001
From: Artem Poltorzhitskiy <aopoltorzhicky@gmail.com>
Date: Sun, 26 Mar 2023 16:08:48 +0400
Subject: [PATCH] Fix: add empty string to valid bytes sequence (#970)

---
 internal/bcd/ast/validators.go      | 2 +-
 internal/bcd/ast/validators_test.go | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/internal/bcd/ast/validators.go b/internal/bcd/ast/validators.go
index 04ceef0d6..27d73111f 100644
--- a/internal/bcd/ast/validators.go
+++ b/internal/bcd/ast/validators.go
@@ -124,7 +124,7 @@ func BytesValidator(value string) error {
 	if len(value)%2 > 0 {
 		return errors.Wrapf(ErrValidation, "invalid bytes in hex length '%s'", value)
 	}
-	if !hexRegex.MatchString(value) {
+	if value != "" && !hexRegex.MatchString(value) {
 		return errors.Wrapf(ErrValidation, "bytes '%s' should be hexademical without prefixes", value)
 	}
 	return nil
diff --git a/internal/bcd/ast/validators_test.go b/internal/bcd/ast/validators_test.go
index 40d4d19e9..51fbfe9fb 100644
--- a/internal/bcd/ast/validators_test.go
+++ b/internal/bcd/ast/validators_test.go
@@ -125,6 +125,10 @@ func TestBytesValidator(t *testing.T) {
 			name:    "test 3",
 			value:   "0x030ed412d33412ab4b71df0aaba07df7ddd2a44eb55c87bf81868ba09a358bc0e0",
 			wantErr: true,
+		}, {
+			name:    "test 4",
+			value:   "",
+			wantErr: false,
 		},
 	}
 	for _, tt := range tests {