btcutil.patch

From ec3a794d547ad1260e50f2942f4bf80528c2e330 Mon Sep 17 00:00:00 2001
From: michael1011 <me@michael1011.at>
Date: Sat, 14 Dec 2019 12:57:55 +0100
Subject: [PATCH] fix Litecoin bech32 address decoding

---
 address.go      |  6 +++---
 address_test.go | 27 +++++++++++++++++++++++++--
 2 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/address.go b/address.go
index 8966de43..4bf4bbd1 100644
--- a/address.go
+++ b/address.go
@@ -137,12 +137,12 @@ func DecodeAddress(addr string, defaultNet *chaincfg.Params) (Address, error) {
 	// Bech32 encoded segwit addresses start with a human-readable part
 	// (hrp) followed by '1'. For Bitcoin mainnet the hrp is "bc", and for
 	// testnet it is "tb". If the address string has a prefix that matches
-	// one of the prefixes for the known networks, we try to decode it as
-	// a segwit address.
+	// the one defined in the defaultNet parameter, we try to decode it
+	// as a segwit address.
 	oneIndex := strings.LastIndexByte(addr, '1')
 	if oneIndex > 1 {
 		prefix := addr[:oneIndex+1]
-		if chaincfg.IsBech32SegwitPrefix(prefix) {
+		if strings.ToLower(prefix) == defaultNet.Bech32HRPSegwit+"1" {
 			witnessVer, witnessProg, err := decodeSegWitAddress(addr)
 			if err != nil {
 				return nil, err