Refactoring

examples/multipro/echo.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"log"
 
-	host "gx/ipfs/QmRS46AyqtpJBsf1zmQdeizSDEzo1qkWR7rdEuPFAv8237/go-libp2p-host"
 	inet "gx/ipfs/QmbD5yKbXahNvoMqzeuNyKQA9vAs9fUvJg2GXeWU1fVqY5/go-libp2p-net"
 
 	uuid "github.com/google/uuid"
@@ -20,20 +19,20 @@ const echoRequest = "/echo/echoreq/0.0.1"
 const echoResponse = "/echo/echoresp/0.0.1"
 
 type EchoProtocol struct {
-	host     host.Host                   // local host
+	node     *Node                       // local host
 	requests map[string]*p2p.EchoRequest // used to access request data from response handlers
 	done     chan bool                   // only for demo purposes to hold main from terminating
 }
 
-func NewEchoProtocol(host host.Host, done chan bool) *EchoProtocol {
-	e := EchoProtocol{host: host, requests: make(map[string]*p2p.EchoRequest), done: done}
-	host.SetStreamHandler(echoRequest, e.onEchoRequest)
-	host.SetStreamHandler(echoResponse, e.onEchoResponse)
+func NewEchoProtocol(node *Node, done chan bool) *EchoProtocol {
+	e := EchoProtocol{node: node, requests: make(map[string]*p2p.EchoRequest), done: done}
+	node.SetStreamHandler(echoRequest, e.onEchoRequest)
+	node.SetStreamHandler(echoResponse, e.onEchoResponse)
 	return &e
 }
 
 // remote peer requests handler
-func (e *EchoProtocol) onEchoRequest(s inet.Stream) {
+func (e EchoProtocol) onEchoRequest(s inet.Stream) {
 	// get request data
 	data := &p2p.EchoRequest{}
 	decoder := protobufCodec.Multicodec(nil).Decoder(bufio.NewReader(s))
@@ -49,10 +48,10 @@ func (e *EchoProtocol) onEchoRequest(s inet.Stream) {
 
 	// send response to request send using the message string he provided
 	resp := &p2p.EchoResponse{
-		MessageData: NewMessageData(e.host.ID().String(), data.MessageData.Id, false),
+		MessageData: NewMessageData(e.node.ID().String(), data.MessageData.Id, false),
 		Message:     data.Message}
 
-	s, respErr := e.host.NewStream(context.Background(), s.Conn().RemotePeer(), echoResponse)
+	s, respErr := e.node.NewStream(context.Background(), s.Conn().RemotePeer(), echoResponse)
 	if respErr != nil {
 		log.Fatal(respErr)
 		return
@@ -66,7 +65,7 @@ func (e *EchoProtocol) onEchoRequest(s inet.Stream) {
 }
 
 // remote echo response handler
-func (e *EchoProtocol) onEchoResponse(s inet.Stream) {
+func (e EchoProtocol) onEchoResponse(s inet.Stream) {
 	data := &p2p.EchoResponse{}
 	decoder := protobufCodec.Multicodec(nil).Decoder(bufio.NewReader(s))
 	err := decoder.Decode(data)
@@ -90,15 +89,15 @@ func (e *EchoProtocol) onEchoResponse(s inet.Stream) {
 	e.done <- true
 }
 
-func (e *EchoProtocol) Echo(node *Node) bool {
-	log.Printf("%s: Sending echo to: %s....", e.host.ID(), node.host.ID())
+func (e EchoProtocol) Echo(node *Node) bool {
+	log.Printf("%s: Sending echo to: %s....", e.node.ID(), node.ID())
 
 	// create message data
 	req := &p2p.EchoRequest{
-		MessageData: NewMessageData(e.host.ID().String(), uuid.New().String(), false),
-		Message:     fmt.Sprintf("Echo from %s", e.host.ID())}
+		MessageData: NewMessageData(e.node.ID().String(), uuid.New().String(), false),
+		Message:     fmt.Sprintf("Echo from %s", e.node.ID())}
 
-	s, err := e.host.NewStream(context.Background(), node.host.ID(), echoRequest)
+	s, err := e.node.NewStream(context.Background(), node.ID(), echoRequest)
 	if err != nil {
 		log.Fatal(err)
 		return false
@@ -112,6 +111,6 @@ func (e *EchoProtocol) Echo(node *Node) bool {
 
 	// store request so response handler has access to it
 	e.requests[req.MessageData.Id] = req
-	log.Printf("%s: Echo to: %s was sent. Message Id: %s, Message: %s", e.host.ID(), node.host.ID(), req.MessageData.Id, req.Message)
+	log.Printf("%s: Echo to: %s was sent. Message Id: %s, Message: %s", e.node.ID(), node.ID(), req.MessageData.Id, req.Message)
 	return true
 }

examples/multipro/main.go

@@ -41,10 +41,10 @@ func main() {
 	// Make 2 hosts
 	h1 := makeRandomNode(port1, done)
 	h2 := makeRandomNode(port2, done)
-	h1.host.Peerstore().AddAddrs(h2.host.ID(), h2.host.Addrs(), ps.PermanentAddrTTL)
-	h2.host.Peerstore().AddAddrs(h1.host.ID(), h1.host.Addrs(), ps.PermanentAddrTTL)
+	h1.Peerstore().AddAddrs(h2.ID(), h2.Addrs(), ps.PermanentAddrTTL)
+	h2.Peerstore().AddAddrs(h1.ID(), h1.Addrs(), ps.PermanentAddrTTL)
 
-	log.Printf("This is a conversation between %s and %s\n", h1.host.ID(), h2.host.ID())
+	log.Printf("This is a conversation between %s and %s\n", h1.ID(), h2.ID())
 
 	// send messages using the protocols
 	h1.Ping(h2)

examples/multipro/node.go

 package main
 
 import (
-	"bufio"
-	"log"
-	"time"
-
 	host "gx/ipfs/QmRS46AyqtpJBsf1zmQdeizSDEzo1qkWR7rdEuPFAv8237/go-libp2p-host"
-	inet "gx/ipfs/QmbD5yKbXahNvoMqzeuNyKQA9vAs9fUvJg2GXeWU1fVqY5/go-libp2p-net"
-
-	protobufCodec "github.com/multiformats/go-multicodec/protobuf"
-
-	p2p "github.com/libp2p/go-libp2p/examples/multipro/pb"
+	peer "gx/ipfs/QmXYjuNuxVzXKJCfWasQk1RqkhVLDM9jtUKhqc2WPQmFSB/go-libp2p-peer"
 )
 
-// node version
-const clientVersion = "go-p2p-node/0.0.1"
-
-// helper method - writes a protobuf go data object to a network stream
-// data - reference of protobuf go data object to send (not the object itself)
-// s - network stream to write the data to
-func sendDataObject(data interface{}, s inet.Stream) bool {
-	writer := bufio.NewWriter(s)
-	enc := protobufCodec.Multicodec(nil).Encoder(writer)
-	err := enc.Encode(data)
-	if err != nil {
-		log.Fatal(err)
-		return false
-	}
-	writer.Flush()
-	return true
+func (n Node) signData(data []byte) ([]byte, error) {
+	key := n.Peerstore().PrivKey(n.ID())
+	res, err := key.Sign(data)
+	return res, err
 }
 
-// helper method - generate message data shared between all node's p2p protocols
-// nodeId - message author id
-// messageId - unique for requests, copied from request for responses
-func NewMessageData(nodeId string, messageId string, gossip bool) *p2p.MessageData {
-	return &p2p.MessageData{ClientVersion: clientVersion,
-		NodeId:    nodeId,
-		Timestamp: time.Now().Unix(),
-		Id:        messageId,
-		Gossip:    gossip}
+func (n Node) verifyData(data []byte, signature []byte, signerHostId peer.ID) bool {
+	key := n.Peerstore().PubKey(signerHostId)
+	res, err := key.Verify(data, signature)
+	return res == true && err == nil
 }
 
 // Node type - implements one or more p2p protocols
 type Node struct {
-	host       	  host.Host // lib-p2p host
-	*PingProtocol           // ping protocol impl
-	*EchoProtocol           // echo protocol impl
+	host.Host     // lib-p2p host
+	*PingProtocol // ping protocol impl
+	*EchoProtocol // echo protocol impl
 }
 
 // create a new node with its implemented protocols
 func NewNode(host host.Host, done chan bool) *Node {
-	return &Node{host: host,
-		PingProtocol: NewPingProtocol(host, done),
-		EchoProtocol: NewEchoProtocol(host, done)}
+	node := &Node{Host: host}
+	node.PingProtocol = NewPingProtocol(node, done)
+	node.EchoProtocol = NewEchoProtocol(node, done)
+	return node
 }

examples/multipro/ping.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"log"
 
-	host "gx/ipfs/QmRS46AyqtpJBsf1zmQdeizSDEzo1qkWR7rdEuPFAv8237/go-libp2p-host"
 	inet "gx/ipfs/QmbD5yKbXahNvoMqzeuNyKQA9vAs9fUvJg2GXeWU1fVqY5/go-libp2p-net"
 
 	uuid "github.com/google/uuid"
@@ -20,20 +19,20 @@ const pingResponse = "/ping/pingresp/0.0.1"
 
 // PingProtocol type
 type PingProtocol struct {
-	host     host.Host                   // local host
+	node     *Node                       // local host
 	requests map[string]*p2p.PingRequest // used to access request data from response handlers
 	done     chan bool                   // only for demo purposes to stop main from terminating
 }
 
-func NewPingProtocol(host host.Host, done chan bool) *PingProtocol {
-	p := &PingProtocol{host: host, requests: make(map[string]*p2p.PingRequest), done: done}
-	host.SetStreamHandler(pingRequest, p.onPingRequest)
-	host.SetStreamHandler(pingResponse, p.onPingResponse)
+func NewPingProtocol(node *Node, done chan bool) *PingProtocol {
+	p := &PingProtocol{node: node, requests: make(map[string]*p2p.PingRequest), done: done}
+	node.SetStreamHandler(pingRequest, p.onPingRequest)
+	node.SetStreamHandler(pingResponse, p.onPingResponse)
 	return p
 }
 
 // remote peer requests handler
-func (p *PingProtocol) onPingRequest(s inet.Stream) {
+func (p PingProtocol) onPingRequest(s inet.Stream) {
 
 	// get request data
 	data := &p2p.PingRequest{}
@@ -48,10 +47,10 @@ func (p *PingProtocol) onPingRequest(s inet.Stream) {
 
 	// send response to sender
 	log.Printf("%s: Sending ping response to %s. Message id: %s...", s.Conn().LocalPeer(), s.Conn().RemotePeer(), data.MessageData.Id)
-	resp := &p2p.PingResponse{MessageData: NewMessageData(p.host.ID().String(), data.MessageData.Id, false),
-		Message: fmt.Sprintf("Ping response from %s", p.host.ID())}
+	resp := &p2p.PingResponse{MessageData: NewMessageData(p.node.ID().String(), data.MessageData.Id, false),
+		Message: fmt.Sprintf("Ping response from %s", p.node.ID())}
 
-	s, respErr := p.host.NewStream(context.Background(), s.Conn().RemotePeer(), pingResponse)
+	s, respErr := p.node.NewStream(context.Background(), s.Conn().RemotePeer(), pingResponse)
 	if respErr != nil {
 		log.Fatal(respErr)
 		return
@@ -65,7 +64,7 @@ func (p *PingProtocol) onPingRequest(s inet.Stream) {
 }
 
 // remote ping response handler
-func (p *PingProtocol) onPingResponse(s inet.Stream) {
+func (p PingProtocol) onPingResponse(s inet.Stream) {
 	data := &p2p.PingResponse{}
 	decoder := protobufCodec.Multicodec(nil).Decoder(bufio.NewReader(s))
 	err := decoder.Decode(data)
@@ -87,14 +86,14 @@ func (p *PingProtocol) onPingResponse(s inet.Stream) {
 	p.done <- true
 }
 
-func (p *PingProtocol) Ping(node *Node) bool {
-	log.Printf("%s: Sending ping to: %s....", p.host.ID(), node.host.ID())
+func (p PingProtocol) Ping(node *Node) bool {
+	log.Printf("%s: Sending ping to: %s....", p.node.ID(), node.ID())
 
 	// create message data
-	req := &p2p.PingRequest{MessageData: NewMessageData(p.host.ID().String(), uuid.New().String(), false),
-		Message: fmt.Sprintf("Ping from %s", p.host.ID())}
+	req := &p2p.PingRequest{MessageData: NewMessageData(p.node.ID().String(), uuid.New().String(), false),
+		Message: fmt.Sprintf("Ping from %s", p.node.ID())}
 
-	s, err := p.host.NewStream(context.Background(), node.host.ID(), pingRequest)
+	s, err := p.node.NewStream(context.Background(), node.Host.ID(), pingRequest)
 	if err != nil {
 		log.Fatal(err)
 		return false
@@ -108,6 +107,6 @@ func (p *PingProtocol) Ping(node *Node) bool {
 
 	// store ref request so response handler has access to it
 	p.requests[req.MessageData.Id] = req
-	log.Printf("%s: Ping to: %s was sent. Message Id: %s, Message: %s", p.host.ID(), node.host.ID(), req.MessageData.Id, req.Message)
+	log.Printf("%s: Ping to: %s was sent. Message Id: %s, Message: %s", p.node.ID(), node.ID(), req.MessageData.Id, req.Message)
 	return true
 }

examples/multipro/protocol.go

+package main
+
+import (
+	"bufio"
+	p2p "github.com/libp2p/go-libp2p/examples/multipro/pb"
+	protobufCodec "github.com/multiformats/go-multicodec/protobuf"
+	inet "gx/ipfs/QmbD5yKbXahNvoMqzeuNyKQA9vAs9fUvJg2GXeWU1fVqY5/go-libp2p-net"
+	"log"
+	"time"
+	//host "gx/ipfs/QmRS46AyqtpJBsf1zmQdeizSDEzo1qkWR7rdEuPFAv8237/go-libp2p-host"
+	//"bytes"
+)
+
+// node version
+const clientVersion = "go-p2p-node/0.0.1"
+
+// helper method - writes a protobuf go data object to a network stream
+// data - reference of protobuf go data object to send (not the object itself)
+// s - network stream to write the data to
+func sendDataObject(data interface{}, s inet.Stream) bool {
+	writer := bufio.NewWriter(s)
+	enc := protobufCodec.Multicodec(nil).Encoder(writer)
+	err := enc.Encode(data)
+	if err != nil {
+		log.Fatal(err)
+		return false
+	}
+	writer.Flush()
+	return true
+}
+
+// helper method - generate message data shared between all node's p2p protocols
+// nodeId - message author id
+// messageId - unique for requests, copied from request for responses
+func NewMessageData(nodeId string, messageId string, gossip bool) *p2p.MessageData {
+	return &p2p.MessageData{ClientVersion: clientVersion,
+		NodeId:    nodeId,
+		Timestamp: time.Now().Unix(),
+		Id:        messageId,
+		Gossip:    gossip}
+}