diff --git a/api/proto/node/pingpong.go b/api/proto/node/pingpong.go
index 18d626380..a461f3d5d 100644
--- a/api/proto/node/pingpong.go
+++ b/api/proto/node/pingpong.go
@@ -54,6 +54,10 @@ type Info struct {
 	PeerID      peer.ID // Peerstore ID
 }
 
+func (info Info) String() string {
+	return fmt.Sprintf("Info:%v/%v=>%v/%v", info.IP, info.Port, info.ValidatorID, info.PeerID)
+}
+
 // PingMessageType defines the data structure of the Ping message
 type PingMessageType struct {
 	Version uint16 // version of the protocol
diff --git a/cmd/beaconchain/main.go b/cmd/beaconchain/main.go
index f44c65df0..7a502a2ce 100644
--- a/cmd/beaconchain/main.go
+++ b/cmd/beaconchain/main.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/log"
 	beaconchain "github.com/harmony-one/harmony/internal/beaconchain/libs"
+	"github.com/harmony-one/harmony/internal/utils"
 )
 
 var (
@@ -46,7 +47,9 @@ func main() {
 	} else {
 		fmt.Printf("Starting new beaconchain\n")
 		beaconchain.SetSaveFile(*resetFlag)
-		bc = beaconchain.New(*numShards, *ip, *port)
+
+		priKey, _, _ := utils.GenKeyP2P(*ip, *port)
+		bc = beaconchain.New(*numShards, *ip, *port, priKey)
 	}
 
 	fmt.Printf("Beacon Chain Started: /ip4/%s/tcp/%v/ipfs/%s\n", *ip, *port, bc.GetID().Pretty())
diff --git a/cmd/client/txgen/main.go b/cmd/client/txgen/main.go
index 97a9e6e56..7efe4cd31 100644
--- a/cmd/client/txgen/main.go
+++ b/cmd/client/txgen/main.go
@@ -16,6 +16,7 @@ import (
 	"github.com/harmony-one/harmony/consensus"
 	"github.com/harmony-one/harmony/core/types"
 	"github.com/harmony-one/harmony/internal/newnode"
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/node"
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
@@ -65,6 +66,7 @@ func main() {
 
 	var bcPeer *p2p.Peer
 	var shardIDLeaderMap map[uint32]p2p.Peer
+	priKey, _, err := utils.GenKeyP2P(*ip, *port)
 
 	if *bcAddr != "" {
 		// Turn the destination into a multiaddr.
@@ -84,7 +86,7 @@ func main() {
 		bcPeer = &p2p.Peer{IP: *bcIP, Port: *bcPort}
 	}
 
-	candidateNode := newnode.New(*ip, *port)
+	candidateNode := newnode.New(*ip, *port, priKey)
 	candidateNode.AddPeer(bcPeer)
 	candidateNode.ContactBeaconChain(*bcPeer)
 	selfPeer := candidateNode.GetSelfPeer()
@@ -113,7 +115,7 @@ func main() {
 
 	// Nodes containing blockchain data to mirror the shards' data in the network
 	nodes := []*node.Node{}
-	host, err := p2pimpl.NewHost(&selfPeer)
+	host, err := p2pimpl.NewHost(&selfPeer, priKey)
 	if err != nil {
 		panic("unable to new host in txgen")
 	}
diff --git a/cmd/client/wallet/main.go b/cmd/client/wallet/main.go
index fd3c8adc1..7c697a208 100644
--- a/cmd/client/wallet/main.go
+++ b/cmd/client/wallet/main.go
@@ -24,6 +24,7 @@ import (
 	"github.com/harmony-one/harmony/core/types"
 	libs "github.com/harmony-one/harmony/internal/beaconchain/libs"
 	beaconchain "github.com/harmony-one/harmony/internal/beaconchain/rpc"
+	"github.com/harmony-one/harmony/internal/utils"
 	"github.com/harmony-one/harmony/node"
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
@@ -299,7 +300,8 @@ func CreateWalletNode() *node.Node {
 
 	// dummy host for wallet
 	self := p2p.Peer{IP: "127.0.0.1", Port: "6789"}
-	host, _ := p2pimpl.NewHost(&self)
+	priKey, _, _ := utils.GenKeyP2P("127.0.0.1", "6789")
+	host, _ := p2pimpl.NewHost(&self, priKey)
 	walletNode := node.New(host, nil, nil)
 	walletNode.Client = client.NewClient(walletNode.GetHost(), &shardIDLeaderMap)
 	return walletNode
diff --git a/cmd/harmony.go b/cmd/harmony.go
index eac75505d..b8a2b4dcd 100644
--- a/cmd/harmony.go
+++ b/cmd/harmony.go
@@ -119,6 +119,7 @@ func main() {
 	var selfPeer p2p.Peer
 	var clientPeer *p2p.Peer
 	var BCPeer *p2p.Peer
+	priKey, _, err := utils.GenKeyP2P(*ip, *port)
 
 	if *bcAddr != "" {
 		// Turn the destination into a multiaddr.
@@ -139,7 +140,7 @@ func main() {
 	}
 
 	//Use Peer Discovery to get shard/leader/peer/...
-	candidateNode := pkg_newnode.New(*ip, *port)
+	candidateNode := pkg_newnode.New(*ip, *port, priKey)
 	candidateNode.AddPeer(BCPeer)
 	candidateNode.ContactBeaconChain(*BCPeer)
 
@@ -149,7 +150,7 @@ func main() {
 	clientPeer = candidateNode.GetClientPeer()
 	selfPeer.PubKey = candidateNode.PubK
 
-	// fmt.Println(peers, leader, selfPeer, clientPeer, *logFolder, *minPeers) //TODO: to be replaced by a logger later: ak, rl
+	fmt.Println("Harmnoy", leader, selfPeer)
 
 	var role string
 	if leader.IP == *ip && leader.Port == *port {
@@ -172,7 +173,7 @@ func main() {
 		ldb, _ = InitLDBDatabase(*ip, *port, *freshDB)
 	}
 
-	host, err := p2pimpl.NewHost(&selfPeer)
+	host, err := p2pimpl.NewHost(&selfPeer, priKey)
 	if err != nil {
 		panic("unable to new host in harmony")
 	}
diff --git a/internal/beaconchain/libs/beaconchain.go b/internal/beaconchain/libs/beaconchain.go
index 6f6ee8bb6..65bb63297 100644
--- a/internal/beaconchain/libs/beaconchain.go
+++ b/internal/beaconchain/libs/beaconchain.go
@@ -18,6 +18,7 @@ import (
 	"github.com/harmony-one/harmony/p2p"
 	"github.com/harmony-one/harmony/p2p/host"
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
+	p2p_crypto "github.com/libp2p/go-libp2p-crypto"
 	peer "github.com/libp2p/go-libp2p-peer"
 )
 
@@ -93,12 +94,12 @@ func (bc *BeaconChain) GetShardLeaderMap() map[int]*node.Info {
 }
 
 //New beaconchain initialization
-func New(numShards int, ip, port string) *BeaconChain {
+func New(numShards int, ip, port string, key p2p_crypto.PrivKey) *BeaconChain {
 	bc := BeaconChain{}
 	bc.log = log.New()
 	bc.PubKey = generateBCKey()
 	bc.Self = p2p.Peer{IP: ip, Port: port}
-	bc.host, _ = p2pimpl.NewHost(&bc.Self)
+	bc.host, _ = p2pimpl.NewHost(&bc.Self, key)
 	bcinfo := &BCInfo{NumberOfShards: numShards, NumberOfNodesAdded: 0,
 		IP:             ip,
 		Port:           port,
diff --git a/internal/newnode/newnode.go b/internal/newnode/newnode.go
index 42947120e..72e5f8687 100644
--- a/internal/newnode/newnode.go
+++ b/internal/newnode/newnode.go
@@ -19,6 +19,7 @@ import (
 	"github.com/harmony-one/harmony/p2p/host"
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
 
+	p2p_crypto "github.com/libp2p/go-libp2p-crypto"
 	multiaddr "github.com/multiformats/go-multiaddr"
 )
 
@@ -39,7 +40,7 @@ type NewNode struct {
 }
 
 // New candidatenode initialization
-func New(ip string, port string) *NewNode {
+func New(ip string, port string, nodePk p2p_crypto.PrivKey) *NewNode {
 	priKey, pubKey := utils.GenKey(ip, port)
 	var node NewNode
 	var err error
@@ -48,8 +49,7 @@ func New(ip string, port string) *NewNode {
 	node.Self = p2p.Peer{IP: ip, Port: port, PubKey: pubKey, ValidatorID: -1}
 	node.log = utils.GetLogInstance()
 	node.SetInfo = make(chan bool)
-	node.host, err = p2pimpl.NewHost(&node.Self)
-	node.log.Info("NewNode New", "Self", node.Self)
+	node.host, err = p2pimpl.NewHost(&node.Self, nodePk)
 	if err != nil {
 		node.log.Error("failed to create new host", "msg", err)
 		return nil
@@ -81,6 +81,7 @@ func (node *NewNode) requestBeaconChain(BCPeer p2p.Peer) (err error) {
 	if err != nil {
 		node.log.Error("Could not Marshall public key into binary")
 	}
+	fmt.Printf("[New Node]: %v\n", *node)
 	nodeInfo := &proto_node.Info{IP: node.Self.IP, Port: node.Self.Port, PubKey: pubk, PeerID: node.Self.PeerID}
 	msg := bcconn.SerializeNodeInfo(nodeInfo)
 	msgToSend := proto_identity.ConstructIdentityMessage(proto_identity.Register, msg)
diff --git a/p2p/host/hostv2/hostv2.go b/p2p/host/hostv2/hostv2.go
index 80f9157ed..b081c9ec6 100644
--- a/p2p/host/hostv2/hostv2.go
+++ b/p2p/host/hostv2/hostv2.go
@@ -13,7 +13,7 @@ import (
 	net "github.com/libp2p/go-libp2p-net"
 	peer "github.com/libp2p/go-libp2p-peer"
 	peerstore "github.com/libp2p/go-libp2p-peerstore"
-	multiaddr "github.com/multiformats/go-multiaddr"
+	ma "github.com/multiformats/go-multiaddr"
 )
 
 const (
@@ -45,7 +45,7 @@ func (host *HostV2) AddPeer(p *p2p.Peer) error {
 	// reconstruct the multiaddress based on ip/port
 	// PeerID has to be known for the ip/port
 	addr := fmt.Sprintf("/ip4/%s/tcp/%s", p.IP, p.Port)
-	targetAddr, err := multiaddr.NewMultiaddr(addr)
+	targetAddr, err := ma.NewMultiaddr(addr)
 	if err != nil {
 		log.Error("AddPeer NewMultiaddr error", "error", err)
 		return err
@@ -65,23 +65,29 @@ func (host *HostV2) Peerstore() peerstore.Peerstore {
 }
 
 // New creates a host for p2p communication
-func New(self p2p.Peer, priKey p2p_crypto.PrivKey) *HostV2 {
-
+func New(self *p2p.Peer, priKey p2p_crypto.PrivKey) *HostV2 {
+	listenAddr, err := ma.NewMultiaddr(fmt.Sprintf("/ip4/0.0.0.0/tcp/%s", self.Port))
+	if err != nil {
+		log.Error("New MA Error", "IP", self.IP, "Port", self.Port)
+		return nil
+	}
 	// TODO (leo), use the [0] of Addrs for now, need to find a reliable way of using listenAddr
 	p2pHost, err := libp2p.New(context.Background(),
-		libp2p.ListenAddrs(self.Addrs[0]),
+		libp2p.ListenAddrs(listenAddr),
 		libp2p.Identity(priKey),
 		// TODO(ricl): Other features to probe
 		// libp2p.EnableRelay; libp2p.Routing;
 	)
 
+	self.PeerID = p2pHost.ID()
+
 	catchError(err)
-	log.Debug("HostV2 is up!", "port", self.Port, "id", p2pHost.ID().Pretty(), "addr", self.Addrs)
+	log.Debug("HostV2 is up!", "port", self.Port, "id", p2pHost.ID().Pretty(), "addr", listenAddr)
 
 	// has to save the private key for host
 	h := &HostV2{
 		h:      p2pHost,
-		self:   self,
+		self:   *self,
 		priKey: priKey,
 	}
 
diff --git a/p2p/p2pimpl/p2pimpl.go b/p2p/p2pimpl/p2pimpl.go
index 5c589c86a..ec6cc4b7f 100644
--- a/p2p/p2pimpl/p2pimpl.go
+++ b/p2p/p2pimpl/p2pimpl.go
@@ -1,7 +1,6 @@
 package p2pimpl
 
 import (
-	"fmt"
 	"net"
 
 	"github.com/harmony-one/harmony/p2p"
@@ -9,8 +8,7 @@ import (
 	"github.com/harmony-one/harmony/p2p/host/hostv2"
 
 	"github.com/harmony-one/harmony/internal/utils"
-	peer "github.com/libp2p/go-libp2p-peer"
-	ma "github.com/multiformats/go-multiaddr"
+	p2p_crypto "github.com/libp2p/go-libp2p-crypto"
 )
 
 // Version The version number of p2p library
@@ -22,33 +20,13 @@ const Version = 2
 // for hostv2, it generates multiaddress, keypair and add PeerID to peer, add priKey to host
 // TODO (leo) the PriKey of the host has to be persistent in disk, so that we don't need to regenerate it
 // on the same host if the node software restarted. The peerstore has to be persistent as well.
-func NewHost(self *p2p.Peer) (p2p.Host, error) {
+func NewHost(self *p2p.Peer, key p2p_crypto.PrivKey) (p2p.Host, error) {
 	if Version == 1 {
 		h := hostv1.New(self)
 		return h, nil
 	}
 
-	selfAddr, err := ma.NewMultiaddr(fmt.Sprintf("/ip4/0.0.0.0/tcp/%s", self.Port))
-	if err != nil {
-		return nil, err
-	}
-	self.Addrs = append(self.Addrs, selfAddr)
-
-	// TODO (leo), change to GenKeyP2PRand() to generate random key. Right now, the key is predictable as the
-	// seed is fixed.
-	priKey, pubKey, err := utils.GenKeyP2P(self.IP, self.Port)
-	if err != nil {
-		return nil, err
-	}
-
-	peerID, err := peer.IDFromPublicKey(pubKey)
-
-	if err != nil {
-		return nil, err
-	}
-
-	self.PeerID = peerID
-	h := hostv2.New(*self, priKey)
+	h := hostv2.New(self, key)
 
 	utils.GetLogInstance().Info("NewHost", "self", net.JoinHostPort(self.IP, self.Port), "PeerID", self.PeerID)