From aea9d584f44cacdb408a26141c7a94ee2027d116 Mon Sep 17 00:00:00 2001
From: Jakub Matys <jakub.matys@satoshilabs.com>
Date: Wed, 3 Oct 2018 11:51:19 +0200
Subject: [PATCH] United Monacoin params registration with implementation in
 other coins

---
 bchain/coins/myriad/myriadparser.go      | 22 ++++++++++------------
 bchain/coins/myriad/myriadparser_test.go | 12 ++++++++++--
 2 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/bchain/coins/myriad/myriadparser.go b/bchain/coins/myriad/myriadparser.go
index 309f7e8b..21572a7b 100644
--- a/bchain/coins/myriad/myriadparser.go
+++ b/bchain/coins/myriad/myriadparser.go
@@ -6,8 +6,8 @@ import (
 	"blockbook/bchain/coins/utils"
 	"bytes"
 
-	"github.com/jakm/btcutil/chaincfg"
 	"github.com/btcsuite/btcd/wire"
+	"github.com/jakm/btcutil/chaincfg"
 )
 
 const (
@@ -18,22 +18,17 @@ var (
 	MainNetParams chaincfg.Params
 )
 
-func initParams() {
+func init() {
 	MainNetParams = chaincfg.MainNetParams
 	MainNetParams.Net = MainnetMagic
 
 	MainNetParams.Bech32HRPSegwit = "my"
 
 	MainNetParams.PubKeyHashAddrID = []byte{50} // 0x32 - starts with M
-	MainNetParams.ScriptHashAddrID = []byte{9} // 0x09 - starts with 4
-	MainNetParams.PrivateKeyID = []byte{178} // 0xB2
-	
-	MainNetParams.HDCoinType = 90
+	MainNetParams.ScriptHashAddrID = []byte{9}  // 0x09 - starts with 4
+	MainNetParams.PrivateKeyID = []byte{178}    // 0xB2
 
-	err := chaincfg.Register(&MainNetParams)
-	if err != nil {
-		panic(err)
-	}
+	MainNetParams.HDCoinType = 90
 }
 
 // MyriadParser handle
@@ -48,8 +43,11 @@ func NewMyriadParser(params *chaincfg.Params, c *btc.Configuration) *MyriadParse
 
 // GetChainParams contains network parameters for the main Myriad network
 func GetChainParams(chain string) *chaincfg.Params {
-	if MainNetParams.Name == "" {
-		initParams()
+	if !chaincfg.IsRegistered(&MainNetParams) {
+		err := chaincfg.Register(&MainNetParams)
+		if err != nil {
+			panic(err)
+		}
 	}
 	switch chain {
 	default:
diff --git a/bchain/coins/myriad/myriadparser_test.go b/bchain/coins/myriad/myriadparser_test.go
index 164e9ab9..8c26c919 100644
--- a/bchain/coins/myriad/myriadparser_test.go
+++ b/bchain/coins/myriad/myriadparser_test.go
@@ -7,10 +7,19 @@ import (
 	"blockbook/bchain/coins/btc"
 	"encoding/hex"
 	"math/big"
+	"os"
 	"reflect"
 	"testing"
+
+	"github.com/jakm/btcutil/chaincfg"
 )
 
+func TestMain(m *testing.M) {
+	c := m.Run()
+	chaincfg.ResetParams()
+	os.Exit(c)
+}
+
 func Test_GetAddrDescFromAddress_Mainnet(t *testing.T) {
 	type args struct {
 		address string
@@ -57,9 +66,8 @@ func Test_GetAddrDescFromAddress_Mainnet(t *testing.T) {
 	}
 }
 
-
 var (
-	testTx1 bchain.Tx
+	testTx1       bchain.Tx
 	testTxPacked1 = "00004e208ab194a1180100000001163465df9bb21d89e90056f11887a398d5a313aef71e3974306459661a91588c000000006b4830450220129c9e9a27406796f3f7d7edcc446037b38ddb3ef94745cec8e7cde618a811140221008eb3b893cdd3725e99b74c020867821e1f74199065260586f5ef3c22b133dd2a012103e2e23d38dc8fa493cde4077f650ab9f22eacafd14a10b123994f38c9f35dfee9ffffffff025e90ec28050000001976a9141cba92fe1510b8c73550fd4d3e0b44acdffcd12d88ac79c268ba0a0000001976a9142f86cdfa98cac89143cf9e3d309cc072caccdf6f88ac00000000"
 )