feat(zeromq): add block info publisher

node/node.go

@@ -167,7 +167,6 @@ func (n *Node) Stop() {
 	// Wait for network to stop
 	time.Sleep(1 * time.Second)
 
-	close(n.eventCh)
 	n.consMgr.Stop()
 	n.sync.Stop()
 	n.state.Close()
@@ -176,6 +175,8 @@ func (n *Node) Stop() {
 	n.http.StopServer()
 	n.jsonrpc.StopServer()
 	n.zeromq.Close()
+
+	close(n.eventCh)
 }
 
 // these methods are using by GUI.

state/state.go

@@ -752,5 +752,8 @@
 		return
 	}
 
-	st.eventCh <- msg
+	select {
+	case st.eventCh <- msg:
+	default:
+	}
 }

util/testsuite/testsuite.go

@@ -868,7 +868,7 @@ func (*TestSuite) HelperSignTransaction(prv crypto.PrivateKey, trx *tx.Tx) {
 	trx.SetPublicKey(prv.PublicKey())
 }
 
-func (*TestSuite) FindFreePort() int {
+func FindFreePort() int {
 	listener, _ := net.Listen("tcp", "localhost:0")
 	defer func() {
 		_ = listener.Close()

www/zmq/config.go

@@ -5,7 +5,6 @@
 	"fmt"
 	"net/url"
 	"strings"
-	"time"
 )
 
 type Config struct {
@@ -14,19 +13,15 @@
 	ZmqPubRawBlock  string `toml:"zmqpubrawblock"`
 	ZmqPubRawTx     string `toml:"zmqpubrawtx"`
 	ZmqPubHWM       int    `toml:"zmqpubhwm"`
-
-	// Private config
-	ZmqAutomaticReconnect bool          `toml:"-"`
-	ZmqDialerRetryTime    time.Duration `toml:"-"`
-	ZmqDialerMaxRetries   int           `toml:"-"`
 }
 
 func DefaultConfig() *Config {
 	return &Config{
-		ZmqAutomaticReconnect: true,
-		ZmqDialerMaxRetries:   10,
-		ZmqDialerRetryTime:    250 * time.Millisecond,
-		ZmqPubHWM:             1000,
+		ZmqPubBlockInfo: "",
+		ZmqPubTxInfo:    "",
+		ZmqPubRawBlock:  "",
+		ZmqPubRawTx:     "",
+		ZmqPubHWM:       1000,
 	}
 }
 
@@ -65,7 +60,7 @@
 func validateTopicSocket(socket string) error {
 	addr, err := url.Parse(socket)
 	if err != nil {
-		return errors.New("failed to parse ZmqPub value: " + err.Error())
+		return errors.New("failed to parse URL: " + err.Error())
 	}
 
 	if addr.Scheme != "tcp" {

www/zmq/config_test.go

@@ -18,7 +18,7 @@ func TestDefaultConfig(t *testing.T) {
 }
 
 func TestBasicCheck(t *testing.T) {
-	testCases := []struct {
+	tests := []struct {
 		name      string
 		config    *Config
 		expectErr bool
@@ -51,7 +51,7 @@ func TestBasicCheck(t *testing.T) {
 		{
 			name: "Empty host",
 			config: &Config{
-				ZmqPubBlockInfo: "tcp://:28332",
+				ZmqPubTxInfo: "tcp://:28332",
 			},
 			expectErr: true,
 		},
@@ -69,10 +69,10 @@ func TestBasicCheck(t *testing.T) {
 		},
 	}
 
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			err := tc.config.BasicCheck()
-			if tc.expectErr {
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := tt.config.BasicCheck()
+			if tt.expectErr {
 				assert.Error(t, err, "BasicCheck should return an error")
 			} else {
 				assert.NoError(t, err, "BasicCheck should not return an error")

www/zmq/publisher.go

@@ -1,20 +1,25 @@
 package zmq
 
 import (
+	"encoding/binary"
+
 	"github.com/go-zeromq/zmq4"
+	"github.com/pactus-project/pactus/crypto"
 	"github.com/pactus-project/pactus/types/block"
 	"github.com/pactus-project/pactus/util/logger"
 )
 
 type Publisher interface {
 	Address() string
 	TopicName() string
+	HWM() int
 
 	onNewBlock(blk *block.Block)
 }
 
 type basePub struct {
 	topic     Topic
+	seqNo     uint32
 	zmqSocket zmq4.Socket
 	logger    *logger.SubLogger
 }
@@ -26,3 +31,42 @@
 func (b *basePub) TopicName() string {
 	return b.topic.String()
 }
+
+func (b *basePub) HWM() int {
+	hwmOpt, _ := b.zmqSocket.GetOption(zmq4.OptionHWM)
+
+	return hwmOpt.(int)
+}
+
+// makeTopicMsg constructs a ZMQ message with a topic ID, message body, and sequence number.
+// The message is constructed as a byte slice with the following structure:
+// - Topic ID (2 Bytes)
+// - Message body (varies based on provided parts)
+// - Sequence number (4 Bytes).
+func (b *basePub) makeTopicMsg(parts ...any) []byte {
+	result := make([]byte, 0, 64)
+
+	// Append Topic ID to the message (2 Bytes)
+	result = append(result, b.topic.Bytes()...)
+
+	// Append message body based on the provided parts
+	for _, part := range parts {
+		switch castedVal := part.(type) {
+		case crypto.Address:
+			result = append(result, castedVal.Bytes()...)
+		case []byte:
+			result = append(result, castedVal...)
+		case uint32:
+			result = binary.BigEndian.AppendUint32(result, castedVal)
+		case uint16:
+			result = binary.BigEndian.AppendUint16(result, castedVal)
+		default:
+			panic("implement me!!")
+		}
+	}
+
+	// Append sequence number to the message (4 Bytes, Big Endian encoding)
+	result = binary.BigEndian.AppendUint32(result, b.seqNo)
+
+	return result
+}

www/zmq/publisher_block_info.go

@@ -0,0 +1,43 @@
+package zmq
+
+import (
+	"github.com/go-zeromq/zmq4"
+	"github.com/pactus-project/pactus/types/block"
+	"github.com/pactus-project/pactus/util/logger"
+)
+
+type blockInfoPub struct {
+	basePub
+}
+
+func newBlockInfoPub(socket zmq4.Socket, logger *logger.SubLogger) Publisher {
+	return &blockInfoPub{
+		basePub: basePub{
+			topic:     TopicBlockInfo,
+			seqNo:     0,
+			zmqSocket: socket,
+			logger:    logger,
+		},
+	}
+}
+
+func (b *blockInfoPub) onNewBlock(blk *block.Block) {
+	rawMsg := b.makeTopicMsg(
+		blk.Header().ProposerAddress(),
+		blk.Header().UnixTime(),
+		uint16(len(blk.Transactions())),
+		blk.Height(),
+	)
+
+	message := zmq4.NewMsg(rawMsg)
+
+	if err := b.zmqSocket.Send(message); err != nil {
+		b.logger.Error("zmq publish message error", "err", err, "publisher", b.TopicName())
+	}
+
+	b.logger.Debug("zmq published message success",
+		"publisher", b.TopicName(),
+		"block_height", blk.Height())
+
+	b.seqNo++
+}

www/zmq/publisher_block_info_test.go

@@ -0,0 +1,61 @@
+package zmq
+
+import (
+	"context"
+	"encoding/binary"
+	"fmt"
+	"testing"
+
+	"github.com/go-zeromq/zmq4"
+	"github.com/pactus-project/pactus/util/testsuite"
+	"github.com/stretchr/testify/require"
+)
+
+func TestBlockInfoPublisher(t *testing.T) {
+	port := testsuite.FindFreePort()
+	addr := fmt.Sprintf("tcp://localhost:%d", port)
+	conf := DefaultConfig()
+	conf.ZmqPubBlockInfo = addr
+
+	td := setup(t, conf)
+	defer td.closeServer()
+
+	td.server.Publishers()
+
+	sub := zmq4.NewSub(context.TODO(), zmq4.WithAutomaticReconnect(false))
+
+	err := sub.Dial(addr)
+	require.NoError(t, err)
+
+	err = sub.SetOption(zmq4.OptionSubscribe, string(TopicBlockInfo.Bytes()))
+	require.NoError(t, err)
+
+	blk, _ := td.TestSuite.GenerateTestBlock(td.RandHeight())
+
+	td.eventCh <- blk
+
+	received, err := sub.Recv()
+	require.NoError(t, err)
+
+	require.NotNil(t, received.Frames)
+	require.GreaterOrEqual(t, len(received.Frames), 1)
+
+	msg := received.Frames[0]
+	require.Len(t, msg, 37)
+
+	topic := msg[:2]
+	proposerBytes := msg[2:23]
+	timestamp := binary.BigEndian.Uint32(msg[23:27])
+	txCount := binary.BigEndian.Uint16(msg[27:29])
+	height := binary.BigEndian.Uint32(msg[29:33])
+	seqNo := binary.BigEndian.Uint32(msg[33:])
+
+	require.Equal(t, TopicBlockInfo.Bytes(), topic)
+	require.Equal(t, blk.Header().ProposerAddress().Bytes(), proposerBytes)
+	require.Equal(t, blk.Header().UnixTime(), timestamp)
+	require.Equal(t, uint16(len(blk.Transactions())), txCount)
+	require.Equal(t, blk.Height(), height)
+	require.Equal(t, uint32(0), seqNo)
+
+	require.NoError(t, sub.Close())
+}

www/zmq/raw_block_publisher.go → www/zmq/publisher_raw_block.go

@@ -13,7 +13,7 @@ type rawBlockPub struct {
 func newRawBlockPub(socket zmq4.Socket, logger *logger.SubLogger) Publisher {
 	return &rawBlockPub{
 		basePub: basePub{
-			topic:     RawBlock,
+			topic:     TopicRawBlock,
 			zmqSocket: socket,
 			logger:    logger,
 		},

www/zmq/raw_tx_publisher.go → www/zmq/publisher_raw_tx.go

@@ -13,7 +13,7 @@ type rawTxPub struct {
 func newRawTxPub(socket zmq4.Socket, logger *logger.SubLogger) Publisher {
 	return &rawTxPub{
 		basePub: basePub{
-			topic:     RawTransaction,
+			topic:     TopicRawTransaction,
 			zmqSocket: socket,
 			logger:    logger,
 		},

www/zmq/tx_info_publisher.go → www/zmq/publisher_tx_info.go

@@ -13,7 +13,7 @@ type txInfoPub struct {
 func newTxInfoPub(socket zmq4.Socket, logger *logger.SubLogger) Publisher {
 	return &txInfoPub{
 		basePub: basePub{
-			topic:     TransactionInfo,
+			topic:     TopicTransactionInfo,
 			zmqSocket: socket,
 			logger:    logger,
 		},