Fix: Wrong nodes for transactions

Signed-off-by: Emanuel Pargov <bamzedev@gmail.com>

network.go

@@ -21,6 +21,7 @@ package hedera
  */
 
 import (
+	"math/rand"
 	"time"
 )
 
@@ -139,6 +140,12 @@ func (network *_Network) _GetNodeAccountIDsForExecute() []AccountID { //nolint
 
 	network.healthyNodesMutex.RLock()
 	defer network.healthyNodesMutex.RUnlock()
+	// shuffle the nodes, so that the first node is not always the same
+	healthyNodes := network.healthyNodes
+	for i := range healthyNodes {
+		j := rand.Intn(i + 1) // #nosec
+		healthyNodes[i], healthyNodes[j] = healthyNodes[j], healthyNodes[i]
+	}
 	for i := 0; i < nodesForTransaction; i++ {
 		nodes = append(nodes, network.healthyNodes[i].(*_Node).accountID)
 	}

network_e2e_test.go

@@ -0,0 +1,125 @@
+//go:build all || testnets
+// +build all testnets
+
+package hedera
+
+/*-
+ *
+ * Hedera Go SDK
+ *
+ * Copyright (C) 2020 - 2023 Hedera Hashgraph, LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"regexp"
+	"testing"
+	"time"
+
+	"github.com/rs/zerolog"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIntegrationNodeForTransaction(t *testing.T) {
+	t.Parallel()
+
+	client := ClientForTestnet()
+	operatorID,err:= AccountIDFromString(os.Getenv("OPERATOR_ID"))
+	require.NoError(t, err)
+	operatorKey, err := PrivateKeyFromString(os.Getenv("OPERATOR_KEY"))
+	require.NoError(t, err)
+	client.SetOperator(operatorID, operatorKey)
+
+	var buf bytes.Buffer
+	writer := zerolog.ConsoleWriter{Out: &buf, TimeFormat: time.RFC3339}
+	zerolog.SetGlobalLevel(zerolog.TraceLevel)
+
+	l := NewLogger("test", LoggerLevelTrace)
+	l.SetLevel(LoggerLevelTrace)
+
+	logger := zerolog.New(&writer)
+	l.logger = &logger
+	client.SetLogger(l)
+	ledger, _ := LedgerIDFromNetworkName(NetworkNameTestnet)
+	client.SetTransportSecurity(true)
+	client.SetLedgerID(*ledger)
+	client.SetMaxAttempts(3)
+	nodeAccountIDs := map[string]struct{}{}
+	for i := 0; i < 10; i++ {
+		_, err := NewTransferTransaction().AddHbarTransfer(operatorID, HbarFromTinybar(-1)).
+		AddHbarTransfer(AccountID{Shard: 0, Realm: 0, Account: 3}, HbarFromTinybar(1)).Execute(client)
+		require.NoError(t, err)
+		logOutput := buf.String()
+		sanitizedLogOutput := regexp.MustCompile(`\x1b\[[0-9;]*m`).ReplaceAllString(logOutput, "")
+		re := regexp.MustCompile(`nodeAccountID=([\d.]+)`)
+		matches := re.FindStringSubmatch(sanitizedLogOutput)
+		if len(matches) > 1 {
+			nodeAccountID := matches[1]
+			nodeAccountIDs[nodeAccountID] = struct{}{}
+		} else {
+			fmt.Println("Node Account ID not found")
+		}
+		buf.Reset()
+	}
+	require.True(t, len(nodeAccountIDs) > 1, "Expected multiple different node account IDs")
+}
+
+func TestIntegrationNodeForQuery(t *testing.T) {
+	t.Parallel()
+
+	client := ClientForTestnet()
+	operatorID,err:= AccountIDFromString(os.Getenv("OPERATOR_ID"))
+	require.NoError(t, err)
+	operatorKey, err := PrivateKeyFromString(os.Getenv("OPERATOR_KEY"))
+	require.NoError(t, err)
+	client.SetOperator(operatorID, operatorKey)
+
+	var buf bytes.Buffer
+	writer := zerolog.ConsoleWriter{Out: &buf, TimeFormat: time.RFC3339}
+	zerolog.SetGlobalLevel(zerolog.TraceLevel)
+
+	l := NewLogger("test", LoggerLevelTrace)
+	l.SetLevel(LoggerLevelTrace)
+
+	logger := zerolog.New(&writer)
+	l.logger = &logger
+	client.SetLogger(l)
+	ledger, _ := LedgerIDFromNetworkName(NetworkNameTestnet)
+	client.SetTransportSecurity(true)
+	client.SetLedgerID(*ledger)
+	client.SetMaxAttempts(3)
+	nodeAccountIDs := map[string]struct{}{}
+	for i := 0; i < 10; i++ {
+		_, err := NewAccountBalanceQuery().
+			SetAccountID(AccountID{Account: 3}).
+			Execute(client)
+		require.NoError(t, err)
+		logOutput := buf.String()
+		sanitizedLogOutput := regexp.MustCompile(`\x1b\[[0-9;]*m`).ReplaceAllString(logOutput, "")
+		re := regexp.MustCompile(`nodeAccountID=([\d.]+)`)
+		matches := re.FindStringSubmatch(sanitizedLogOutput)
+		if len(matches) > 1 {
+			nodeAccountID := matches[1]
+			nodeAccountIDs[nodeAccountID] = struct{}{}
+		} else {
+			fmt.Println("Node Account ID not found")
+		}
+		buf.Reset()
+	}
+	require.True(t, len(nodeAccountIDs) > 1, "Expected multiple different node account IDs")
+}