diff --git a/cmd/run.go b/cmd/run.go
index 748814c6ee..3bd3e01387 100644
--- a/cmd/run.go
+++ b/cmd/run.go
@@ -148,9 +148,6 @@ func start(cliCtx *cli.Context) error {
 	if c.Metrics.ProfilingEnabled {
 		go startProfilingHttpServer(c.Metrics)
 	}
-	if c.Metrics.Enabled {
-		go startMetricsHttpServer(c.Metrics)
-	}
 	for _, component := range components {
 		switch component {
 		case AGGREGATOR:
@@ -243,6 +240,10 @@ func start(cliCtx *cli.Context) error {
 		}
 	}
 
+	if c.Metrics.Enabled {
+		go startMetricsHttpServer(c.Metrics)
+	}
+
 	waitSignal(cancelFuncs)
 
 	return nil
diff --git a/go.mod b/go.mod
index 9d48041dc4..b7f92b7110 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/0xPolygonHermez/zkevm-node
 go 1.19
 
 require (
-	github.com/0xPolygonHermez/zkevm-data-streamer v0.1.0
+	github.com/0xPolygonHermez/zkevm-data-streamer v0.1.1
 	github.com/didip/tollbooth/v6 v6.1.2
 	github.com/dop251/goja v0.0.0-20230806174421-c933cf95e127
 	github.com/ethereum/go-ethereum v1.13.2
diff --git a/go.sum b/go.sum
index 5585d74562..7f43e03aad 100644
--- a/go.sum
+++ b/go.sum
@@ -42,8 +42,8 @@ cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3f
 dario.cat/mergo v1.0.0 h1:AGCNq9Evsj31mOgNPcLyXc+4PNABt905YmuqPYYpBWk=
 dario.cat/mergo v1.0.0/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/0xPolygonHermez/zkevm-data-streamer v0.1.0 h1:fYsPST5nwgE+IAQMa53kk1jgGJcKwUAmtOd4gABm92I=
-github.com/0xPolygonHermez/zkevm-data-streamer v0.1.0/go.mod h1:853hkExOKPpMqbyEGqF8cuobSlbVd2OLVEZoRFTGRzo=
+github.com/0xPolygonHermez/zkevm-data-streamer v0.1.1 h1:MuaJWH06OnGPU+/tnAdfqOu088+N+XWfxZkQv4+S/Ss=
+github.com/0xPolygonHermez/zkevm-data-streamer v0.1.1/go.mod h1:853hkExOKPpMqbyEGqF8cuobSlbVd2OLVEZoRFTGRzo=
 github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
diff --git a/sequencer/sequencer.go b/sequencer/sequencer.go
index 94b56d93bb..7e56cdc2f6 100644
--- a/sequencer/sequencer.go
+++ b/sequencer/sequencer.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"reflect"
 	"time"
 
 	"github.com/0xPolygonHermez/zkevm-data-streamer/datastreamer"
@@ -119,32 +118,6 @@ func (s *Sequencer) Start(ctx context.Context) {
 			log.Fatalf("failed to create stream server, err: %v", err)
 		}
 
-		// Set entities definition
-		entriesDefinition := map[datastreamer.EntryType]datastreamer.EntityDefinition{
-			state.EntryTypeL2BlockStart: {
-				Name:       "L2BlockStart",
-				StreamType: state.StreamTypeSequencer,
-				Definition: reflect.TypeOf(state.DSL2BlockStart{}),
-			},
-			state.EntryTypeL2Tx: {
-				Name:       "L2Transaction",
-				StreamType: state.StreamTypeSequencer,
-				Definition: reflect.TypeOf(state.DSL2Transaction{}),
-			},
-			state.EntryTypeL2BlockEnd: {
-				Name:       "L2BlockEnd",
-				StreamType: state.StreamTypeSequencer,
-				Definition: reflect.TypeOf(state.DSL2BlockEnd{}),
-			},
-			state.EntryTypeUpdateGER: {
-				Name:       "UpdateGER",
-				StreamType: state.StreamTypeSequencer,
-				Definition: reflect.TypeOf(state.DSUpdateGER{}),
-			},
-		}
-
-		streamServer.SetEntriesDef(entriesDefinition)
-
 		dbManager.streamServer = &streamServer
 		err = dbManager.streamServer.Start()
 		if err != nil {
diff --git a/state/datastream.go b/state/datastream.go
index 9c9c79680f..9aa6eda6bc 100644
--- a/state/datastream.go
+++ b/state/datastream.go
@@ -73,6 +73,17 @@ func (b DSL2BlockStart) Encode() []byte {
 	return bytes
 }
 
+// Decode decodes the DSL2BlockStart from a byte slice
+func (b DSL2BlockStart) Decode(data []byte) DSL2BlockStart {
+	b.BatchNumber = binary.LittleEndian.Uint64(data[0:8])
+	b.L2BlockNumber = binary.LittleEndian.Uint64(data[8:16])
+	b.Timestamp = int64(binary.LittleEndian.Uint64(data[16:24]))
+	b.GlobalExitRoot = common.BytesToHash(data[24:56])
+	b.Coinbase = common.BytesToAddress(data[56:76])
+	b.ForkID = binary.LittleEndian.Uint16(data[76:78])
+	return b
+}
+
 // DSL2Transaction represents a data stream L2 transaction
 type DSL2Transaction struct {
 	EffectiveGasPricePercentage uint8  // 1 byte
@@ -91,6 +102,15 @@ func (l DSL2Transaction) Encode() []byte {
 	return bytes
 }
 
+// Decode decodes the DSL2Transaction from a byte slice
+func (l DSL2Transaction) Decode(data []byte) DSL2Transaction {
+	l.EffectiveGasPricePercentage = uint8(data[0])
+	l.IsValid = uint8(data[1])
+	l.EncodedLength = binary.LittleEndian.Uint32(data[2:6])
+	l.Encoded = data[6:]
+	return l
+}
+
 // DSL2BlockEnd represents a L2 block end
 type DSL2BlockEnd struct {
 	L2BlockNumber uint64      // 8 bytes
@@ -107,6 +127,14 @@ func (b DSL2BlockEnd) Encode() []byte {
 	return bytes
 }
 
+// Decode decodes the DSL2BlockEnd from a byte slice
+func (b DSL2BlockEnd) Decode(data []byte) DSL2BlockEnd {
+	b.L2BlockNumber = binary.LittleEndian.Uint64(data[0:8])
+	b.BlockHash = common.BytesToHash(data[8:40])
+	b.StateRoot = common.BytesToHash(data[40:72])
+	return b
+}
+
 // DSBookMark represents a data stream bookmark
 type DSBookMark struct {
 	Type          byte
@@ -121,6 +149,13 @@ func (b DSBookMark) Encode() []byte {
 	return bytes
 }
 
+// Decode decodes the DSBookMark from a byte slice
+func (b DSBookMark) Decode(data []byte) DSBookMark {
+	b.Type = byte(data[0])
+	b.L2BlockNumber = binary.LittleEndian.Uint64(data[1:9])
+	return b
+}
+
 // DSUpdateGER represents a data stream GER update
 type DSUpdateGER struct {
 	BatchNumber    uint64         // 8 bytes
@@ -143,6 +178,17 @@ func (g DSUpdateGER) Encode() []byte {
 	return bytes
 }
 
+// Decode decodes the DSUpdateGER from a byte slice
+func (g DSUpdateGER) Decode(data []byte) DSUpdateGER {
+	g.BatchNumber = binary.LittleEndian.Uint64(data[0:8])
+	g.Timestamp = int64(binary.LittleEndian.Uint64(data[8:16]))
+	g.GlobalExitRoot = common.BytesToHash(data[16:48])
+	g.Coinbase = common.BytesToAddress(data[48:68])
+	g.ForkID = binary.LittleEndian.Uint16(data[68:70])
+	g.StateRoot = common.BytesToHash(data[70:102])
+	return g
+}
+
 // DSState gathers the methods required to interact with the data stream state.
 type DSState interface {
 	GetDSGenesisBlock(ctx context.Context, dbTx pgx.Tx) (*DSL2Block, error)
diff --git a/tools/datastreamer/main.go b/tools/datastreamer/main.go
index 826abf1ee5..b7534c6b58 100644
--- a/tools/datastreamer/main.go
+++ b/tools/datastreamer/main.go
@@ -5,7 +5,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"os"
-	"reflect"
 	"time"
 
 	"github.com/0xPolygonHermez/zkevm-data-streamer/datastreamer"
@@ -112,32 +111,6 @@ func initializeStreamServer(c *config.Config) (*datastreamer.StreamServer, error
 		return nil, err
 	}
 
-	// Set entities definition
-	entriesDefinition := map[datastreamer.EntryType]datastreamer.EntityDefinition{
-		state.EntryTypeL2BlockStart: {
-			Name:       "L2BlockStart",
-			StreamType: state.StreamTypeSequencer,
-			Definition: reflect.TypeOf(state.DSL2BlockStart{}),
-		},
-		state.EntryTypeL2Tx: {
-			Name:       "L2Transaction",
-			StreamType: state.StreamTypeSequencer,
-			Definition: reflect.TypeOf(state.DSL2Transaction{}),
-		},
-		state.EntryTypeL2BlockEnd: {
-			Name:       "L2BlockEnd",
-			StreamType: state.StreamTypeSequencer,
-			Definition: reflect.TypeOf(state.DSL2BlockEnd{}),
-		},
-		state.EntryTypeUpdateGER: {
-			Name:       "UpdateGER",
-			StreamType: state.StreamTypeSequencer,
-			Definition: reflect.TypeOf(state.DSUpdateGER{}),
-		},
-	}
-
-	streamServer.SetEntriesDef(entriesDefinition)
-
 	err = streamServer.Start()
 	if err != nil {
 		return nil, err
@@ -454,55 +427,47 @@ func decodeL2Block(cliCtx *cli.Context) error {
 func printEntry(entry datastreamer.FileEntry, streamServer *datastreamer.StreamServer) {
 	switch entry.Type {
 	case state.EntryTypeBookMark:
+		bookmark := state.DSBookMark{}.Decode(entry.Data)
 		printColored(color.FgGreen, "Entry Type......: ")
 		printColored(color.FgHiYellow, "BookMark\n")
 		printColored(color.FgGreen, "Entry Number....: ")
 		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", entry.Number))
 		printColored(color.FgGreen, "L2 Block Number.: ")
-		l2BlockNumber := binary.LittleEndian.Uint64(entry.Data[1:9])
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", l2BlockNumber))
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", bookmark.L2BlockNumber))
 	case state.EntryTypeL2BlockStart:
+		blockStart := state.DSL2BlockStart{}.Decode(entry.Data)
 		printColored(color.FgGreen, "Entry Type......: ")
 		printColored(color.FgHiYellow, "L2 Block Start\n")
 		printColored(color.FgGreen, "Entry Number....: ")
 		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", entry.Number))
 		printColored(color.FgGreen, "Batch Number....: ")
-		batchNumber := binary.LittleEndian.Uint64(entry.Data[0:8])
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", batchNumber))
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", blockStart.BatchNumber))
 		printColored(color.FgGreen, "L2 Block Number.: ")
-		l2BlockNumber := binary.LittleEndian.Uint64(entry.Data[8:16])
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", l2BlockNumber))
-		timestamp := binary.LittleEndian.Uint64(entry.Data[16:24])
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", blockStart.L2BlockNumber))
 		printColored(color.FgGreen, "Timestamp.......: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%v (%d)\n", time.Unix(int64(timestamp), 0), timestamp))
-		globalExitRoot := "0x" + common.Bytes2Hex(entry.Data[24:56])
+		printColored(color.FgHiWhite, fmt.Sprintf("%v (%d)\n", time.Unix(int64(blockStart.Timestamp), 0), blockStart.Timestamp))
 		printColored(color.FgGreen, "Global Exit Root: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", globalExitRoot))
-		coinbase := "0x" + common.Bytes2Hex(entry.Data[56:76])
+		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", blockStart.GlobalExitRoot))
 		printColored(color.FgGreen, "Coinbase........: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", coinbase))
-		forkID := binary.LittleEndian.Uint16(entry.Data[76:78])
+		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", blockStart.Coinbase))
 		printColored(color.FgGreen, "Fork ID.........: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", forkID))
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", blockStart.ForkID))
 	case state.EntryTypeL2Tx:
+		dsTx := state.DSL2Transaction{}.Decode(entry.Data)
 		printColored(color.FgGreen, "Entry Type......: ")
 		printColored(color.FgHiYellow, "L2 Transaction\n")
 		printColored(color.FgGreen, "Entry Number....: ")
 		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", entry.Number))
 		printColored(color.FgGreen, "Effec. Gas Price: ")
-		effectiveGasPricePercentage := entry.Data[0]
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", effectiveGasPricePercentage))
-		isValid := entry.Data[1] == 1
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", dsTx.EffectiveGasPricePercentage))
 		printColored(color.FgGreen, "Is Valid........: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%t\n", isValid))
-		encodeLength := binary.LittleEndian.Uint16(entry.Data[2:6])
-		printColored(color.FgGreen, "Encode Length...: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", encodeLength))
-		encode := entry.Data[6:]
-		printColored(color.FgGreen, "Encode..........: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", "0x"+common.Bytes2Hex(encode)))
-
-		tx, err := state.DecodeTx(common.Bytes2Hex(encode))
+		printColored(color.FgHiWhite, fmt.Sprintf("%t\n", dsTx.IsValid == 1))
+		printColored(color.FgGreen, "Encoded Length..: ")
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", dsTx.EncodedLength))
+		printColored(color.FgGreen, "Encoded.........: ")
+		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", "0x"+common.Bytes2Hex(dsTx.Encoded)))
+
+		tx, err := state.DecodeTx(common.Bytes2Hex(dsTx.Encoded))
 		if err != nil {
 			log.Fatal(err)
 		}
@@ -518,39 +483,35 @@ func printEntry(entry datastreamer.FileEntry, streamServer *datastreamer.StreamS
 		printColored(color.FgGreen, "Nonce...........: ")
 		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", nonce))
 	case state.EntryTypeL2BlockEnd:
+		blockEnd := state.DSL2BlockEnd{}.Decode(entry.Data)
 		printColored(color.FgGreen, "Entry Type......: ")
 		printColored(color.FgHiYellow, "L2 Block End\n")
 		printColored(color.FgGreen, "Entry Number....: ")
 		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", entry.Number))
 		printColored(color.FgGreen, "L2 Block Number.: ")
-		l2BlockNumber := binary.LittleEndian.Uint64(entry.Data[0:8])
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", l2BlockNumber))
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", blockEnd.L2BlockNumber))
 		printColored(color.FgGreen, "L2 Block Hash...: ")
-		printColored(color.FgHiWhite, fmt.Sprint("0x"+common.Bytes2Hex(entry.Data[8:40])+"\n"))
+		printColored(color.FgHiWhite, fmt.Sprint("0x"+blockEnd.BlockHash.Hex()+"\n"))
 		printColored(color.FgGreen, "State Root......: ")
-		printColored(color.FgHiWhite, fmt.Sprint("0x"+common.Bytes2Hex(entry.Data[40:72])+"\n"))
+		printColored(color.FgHiWhite, fmt.Sprint("0x"+blockEnd.StateRoot.Hex()+"\n"))
 	case state.EntryTypeUpdateGER:
+		updateGer := state.DSUpdateGER{}.Decode(entry.Data)
 		printColored(color.FgGreen, "Entry Type......: ")
 		printColored(color.FgHiYellow, "Update GER\n")
 		printColored(color.FgGreen, "Entry Number....: ")
 		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", entry.Number))
 		printColored(color.FgGreen, "Batch Number....: ")
-		batchNumber := binary.LittleEndian.Uint64(entry.Data[0:8])
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", batchNumber))
-		timestamp := binary.LittleEndian.Uint64(entry.Data[8:16])
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", updateGer.BatchNumber))
 		printColored(color.FgGreen, "Timestamp.......: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%v (%d)\n", time.Unix(int64(timestamp), 0), timestamp))
-		globalExitRoot := "0x" + common.Bytes2Hex(entry.Data[16:48])
+		printColored(color.FgHiWhite, fmt.Sprintf("%v (%d)\n", time.Unix(int64(updateGer.Timestamp), 0), updateGer.Timestamp))
 		printColored(color.FgGreen, "Global Exit Root: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", globalExitRoot))
-		coinbase := "0x" + common.Bytes2Hex(entry.Data[48:68])
+		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", updateGer.GlobalExitRoot))
 		printColored(color.FgGreen, "Coinbase........: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", coinbase))
-		forkID := binary.LittleEndian.Uint16(entry.Data[68:70])
+		printColored(color.FgHiWhite, fmt.Sprintf("%s\n", updateGer.Coinbase))
 		printColored(color.FgGreen, "Fork ID.........: ")
-		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", forkID))
+		printColored(color.FgHiWhite, fmt.Sprintf("%d\n", updateGer.ForkID))
 		printColored(color.FgGreen, "State Root......: ")
-		printColored(color.FgHiWhite, fmt.Sprint("0x"+common.Bytes2Hex(entry.Data[70:102])+"\n"))
+		printColored(color.FgHiWhite, fmt.Sprint("0x"+updateGer.StateRoot.Hex()+"\n"))
 	}
 }