From fa8bdff02272b127e3e4dbd1ec91a85c1fbded3a Mon Sep 17 00:00:00 2001
From: motty <admin@fujicoin.org>
Date: Sat, 20 Mar 2021 07:48:33 +0900
Subject: [PATCH] OP_RETURN: upgrade to utf8

---
 bchain/coins/btc/bitcoinparser.go | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/bchain/coins/btc/bitcoinparser.go b/bchain/coins/btc/bitcoinparser.go
index acfeadf7..37c7af45 100644
--- a/bchain/coins/btc/bitcoinparser.go
+++ b/bchain/coins/btc/bitcoinparser.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/binary"
 	"encoding/hex"
+        "unicode/utf8"
 	"math/big"
 	"strconv"
 
@@ -160,14 +161,7 @@ func (p *BitcoinParser) TryParseOPReturn(script []byte) string {
 				return ed
 			}
 
-			isASCII := true
-			for _, c := range data {
-				if c < 32 || c > 127 {
-					isASCII = false
-					break
-				}
-			}
-			if isASCII {
+			if utf8.Valid(data) {
 				ed = "(" + string(data) + ")"
 			} else {
 				ed = hex.EncodeToString(data)