Add rpc server for beacon chain

beaconchain/libs/beaconchain.go

@@ -1,7 +1,9 @@
 package beaconchain
 
 import (
+	"github.com/harmony-one/harmony/beaconchain/rpc"
 	"math/rand"
+	"strconv"
 	"sync"
 
 	"github.com/dedis/kyber"
@@ -18,6 +20,9 @@ import (
 var mutex sync.Mutex
 var identityPerBlock = 100000
 
+// BeaconchainServicePortDiff is the positive port diff from beacon chain's self port
+const BeaconchainServicePortDiff = 4444
+
 // BeaconChain (Blockchain) keeps Identities per epoch, currently centralized!
 type BeaconChain struct {
 	Leaders            []*bcconn.NodeInfo
@@ -29,6 +34,34 @@ type BeaconChain struct {
 	IP                 string
 	Port               string
 	host               host.Host
+
+	rpcServer *beaconchain.Server
+}
+
+// SupportRPC initializes and starts the rpc service
+func (bc *BeaconChain) SupportRPC() {
+	bc.InitRPCServer()
+	bc.StartRPCServer()
+}
+
+// InitRPCServer initializes Rpc server.
+func (bc *BeaconChain) InitRPCServer() {
+	bc.rpcServer = beaconchain.NewServer(bc.GetShardLeaderMap)
+}
+
+// StartRPCServer starts Rpc server.
+func (bc *BeaconChain) StartRPCServer() {
+	port, err := strconv.Atoi(bc.Port)
+	if err != nil {
+		port = 0
+	}
+	bc.log.Info("support_client: StartRpcServer on port:", "port", strconv.Itoa(port+BeaconchainServicePortDiff))
+	bc.rpcServer.Start(bc.IP, strconv.Itoa(port+BeaconchainServicePortDiff))
+}
+
+// GetShardLeaderMap returns the map from shard id to leader.
+func (bc *BeaconChain) GetShardLeaderMap() map[int]*bcconn.NodeInfo {
+	return bc.ShardLeaderMap
 }
 
 //New beaconchain initialization
@@ -38,6 +71,7 @@ func New(numShards int, ip, port string) *BeaconChain {
 	bc.NumberOfShards = numShards
 	bc.PubKey = generateBCKey()
 	bc.NumberOfNodesAdded = 0
+	bc.ShardLeaderMap = make(map[int]*bcconn.NodeInfo)
 	bc.Port = port
 	bc.IP = ip
 	bc.host = p2pimpl.NewHost(p2p.Peer{IP: ip, Port: port})
@@ -59,6 +93,7 @@ func (bc *BeaconChain) AcceptConnections(b []byte) {
 	_, isLeader := utils.AllocateShard(bc.NumberOfNodesAdded, bc.NumberOfShards)
 	if isLeader {
 		bc.Leaders = append(bc.Leaders, Node)
+		bc.ShardLeaderMap[bc.NumberOfNodesAdded-1] = Node
 	}
 	response := bcconn.ResponseRandomNumber{NumberOfShards: bc.NumberOfShards, NumberOfNodesAdded: bc.NumberOfNodesAdded, Leaders: bc.Leaders}
 	msg := bcconn.SerializeRandomInfo(response)

beaconchain/main/main.go

@@ -38,5 +38,7 @@ func main() {
 	log.Root().SetHandler(h)
 
 	bc := beaconchain.New(*numShards, *ip, *port)
+	go bc.SupportRPC()
+
 	bc.StartServer()
 }

beaconchain/rpc/client.go

@@ -0,0 +1,50 @@
+package beaconchain
+
+import (
+	"context"
+	"fmt"
+	proto "github.com/harmony-one/harmony/beaconchain/rpc/proto"
+	"log"
+	"time"
+
+	"google.golang.org/grpc"
+)
+
+// Client is the client model for beaconchain service.
+type Client struct {
+	beaconChainServiceClient proto.BeaconChainServiceClient
+	opts                     []grpc.DialOption
+	conn                     *grpc.ClientConn
+}
+
+// NewClient setups a Client given ip and port.
+func NewClient(ip, port string) *Client {
+	client := Client{}
+	client.opts = append(client.opts, grpc.WithInsecure())
+	var err error
+	client.conn, err = grpc.Dial(fmt.Sprintf("%s:%s", ip, port), client.opts...)
+	if err != nil {
+		log.Fatalf("fail to dial: %v", err)
+		return nil
+	}
+
+	client.beaconChainServiceClient = proto.NewBeaconChainServiceClient(client.conn)
+	return &client
+}
+
+// Close closes the Client.
+func (client *Client) Close() {
+	client.conn.Close()
+}
+
+// GetLeaders gets current leaders from beacon chain
+func (client *Client) GetLeaders() *proto.FetchLeadersResponse {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	request := &proto.FetchLeadersRequest{}
+	response, err := client.beaconChainServiceClient.FetchLeaders(ctx, request)
+	if err != nil {
+		log.Fatalf("Error fetching leaders from beacon chain: %s", err)
+	}
+	return response
+}

beaconchain/rpc/proto/beaconchain.pb.go

@@ -0,0 +1,247 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: beaconchain.proto
+
+package beaconchain
+
+import (
+	context "context"
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// FetchLeadersRequest is the request to fetch the current leaders.
+type FetchLeadersRequest struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *FetchLeadersRequest) Reset()         { *m = FetchLeadersRequest{} }
+func (m *FetchLeadersRequest) String() string { return proto.CompactTextString(m) }
+func (*FetchLeadersRequest) ProtoMessage()    {}
+func (*FetchLeadersRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_474fd8061d1037cf, []int{0}
+}
+
+func (m *FetchLeadersRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FetchLeadersRequest.Unmarshal(m, b)
+}
+func (m *FetchLeadersRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FetchLeadersRequest.Marshal(b, m, deterministic)
+}
+func (m *FetchLeadersRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FetchLeadersRequest.Merge(m, src)
+}
+func (m *FetchLeadersRequest) XXX_Size() int {
+	return xxx_messageInfo_FetchLeadersRequest.Size(m)
+}
+func (m *FetchLeadersRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_FetchLeadersRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FetchLeadersRequest proto.InternalMessageInfo
+
+// FetchLeadersResponse is the response of FetchLeadersRequest.
+type FetchLeadersResponse struct {
+	Leaders              []*FetchLeadersResponse_Leader `protobuf:"bytes,1,rep,name=leaders,proto3" json:"leaders,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}                       `json:"-"`
+	XXX_unrecognized     []byte                         `json:"-"`
+	XXX_sizecache        int32                          `json:"-"`
+}
+
+func (m *FetchLeadersResponse) Reset()         { *m = FetchLeadersResponse{} }
+func (m *FetchLeadersResponse) String() string { return proto.CompactTextString(m) }
+func (*FetchLeadersResponse) ProtoMessage()    {}
+func (*FetchLeadersResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_474fd8061d1037cf, []int{1}
+}
+
+func (m *FetchLeadersResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FetchLeadersResponse.Unmarshal(m, b)
+}
+func (m *FetchLeadersResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FetchLeadersResponse.Marshal(b, m, deterministic)
+}
+func (m *FetchLeadersResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FetchLeadersResponse.Merge(m, src)
+}
+func (m *FetchLeadersResponse) XXX_Size() int {
+	return xxx_messageInfo_FetchLeadersResponse.Size(m)
+}
+func (m *FetchLeadersResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_FetchLeadersResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FetchLeadersResponse proto.InternalMessageInfo
+
+func (m *FetchLeadersResponse) GetLeaders() []*FetchLeadersResponse_Leader {
+	if m != nil {
+		return m.Leaders
+	}
+	return nil
+}
+
+type FetchLeadersResponse_Leader struct {
+	Ip                   string   `protobuf:"bytes,1,opt,name=ip,proto3" json:"ip,omitempty"`
+	Port                 string   `protobuf:"bytes,2,opt,name=port,proto3" json:"port,omitempty"`
+	ShardId              uint32   `protobuf:"varint,3,opt,name=shardId,proto3" json:"shardId,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *FetchLeadersResponse_Leader) Reset()         { *m = FetchLeadersResponse_Leader{} }
+func (m *FetchLeadersResponse_Leader) String() string { return proto.CompactTextString(m) }
+func (*FetchLeadersResponse_Leader) ProtoMessage()    {}
+func (*FetchLeadersResponse_Leader) Descriptor() ([]byte, []int) {
+	return fileDescriptor_474fd8061d1037cf, []int{1, 0}
+}
+
+func (m *FetchLeadersResponse_Leader) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FetchLeadersResponse_Leader.Unmarshal(m, b)
+}
+func (m *FetchLeadersResponse_Leader) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FetchLeadersResponse_Leader.Marshal(b, m, deterministic)
+}
+func (m *FetchLeadersResponse_Leader) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FetchLeadersResponse_Leader.Merge(m, src)
+}
+func (m *FetchLeadersResponse_Leader) XXX_Size() int {
+	return xxx_messageInfo_FetchLeadersResponse_Leader.Size(m)
+}
+func (m *FetchLeadersResponse_Leader) XXX_DiscardUnknown() {
+	xxx_messageInfo_FetchLeadersResponse_Leader.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FetchLeadersResponse_Leader proto.InternalMessageInfo
+
+func (m *FetchLeadersResponse_Leader) GetIp() string {
+	if m != nil {
+		return m.Ip
+	}
+	return ""
+}
+
+func (m *FetchLeadersResponse_Leader) GetPort() string {
+	if m != nil {
+		return m.Port
+	}
+	return ""
+}
+
+func (m *FetchLeadersResponse_Leader) GetShardId() uint32 {
+	if m != nil {
+		return m.ShardId
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*FetchLeadersRequest)(nil), "beaconchain.FetchLeadersRequest")
+	proto.RegisterType((*FetchLeadersResponse)(nil), "beaconchain.FetchLeadersResponse")
+	proto.RegisterType((*FetchLeadersResponse_Leader)(nil), "beaconchain.FetchLeadersResponse.Leader")
+}
+
+func init() { proto.RegisterFile("beaconchain.proto", fileDescriptor_474fd8061d1037cf) }
+
+var fileDescriptor_474fd8061d1037cf = []byte{
+	// 207 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0x4c, 0x4a, 0x4d, 0x4c,
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+	0x5c, 0x90, 0x9f, 0x57, 0x9c, 0x2a, 0xe4, 0xc4, 0xc5, 0x9e, 0x03, 0x11, 0x92, 0x60, 0x54, 0x60,
+	0xd6, 0xe0, 0x36, 0xd2, 0xd0, 0x43, 0xb6, 0x01, 0x9b, 0x1e, 0x3d, 0x08, 0x3f, 0x08, 0xa6, 0x51,
+	0xca, 0x8d, 0x8b, 0x0d, 0x22, 0x24, 0xc4, 0xc7, 0xc5, 0x94, 0x59, 0x20, 0xc1, 0xa8, 0xc0, 0xa8,
+	0xc1, 0x19, 0xc4, 0x94, 0x59, 0x20, 0x24, 0xc4, 0xc5, 0x52, 0x90, 0x5f, 0x54, 0x22, 0xc1, 0x04,
+	0x16, 0x01, 0xb3, 0x85, 0x24, 0xb8, 0xd8, 0x8b, 0x33, 0x12, 0x8b, 0x52, 0x3c, 0x53, 0x24, 0x98,
+	0x15, 0x18, 0x35, 0x78, 0x83, 0x60, 0x5c, 0xa3, 0x6c, 0x2e, 0x21, 0x27, 0xb0, 0xdd, 0xce, 0x20,
+	0xbb, 0x83, 0x53, 0x8b, 0xca, 0x32, 0x93, 0x53, 0x85, 0x42, 0xb9, 0x78, 0x90, 0x5d, 0x21, 0xa4,
+	0x80, 0xc7, 0x81, 0x60, 0xcf, 0x4a, 0x29, 0x12, 0xf4, 0x82, 0x12, 0x43, 0x12, 0x1b, 0x38, 0xf0,
+	0x8c, 0x01, 0x01, 0x00, 0x00, 0xff, 0xff, 0x27, 0x0b, 0x9f, 0xda, 0x51, 0x01, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// BeaconChainServiceClient is the client API for BeaconChainService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type BeaconChainServiceClient interface {
+	FetchLeaders(ctx context.Context, in *FetchLeadersRequest, opts ...grpc.CallOption) (*FetchLeadersResponse, error)
+}
+
+type beaconChainServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewBeaconChainServiceClient(cc *grpc.ClientConn) BeaconChainServiceClient {
+	return &beaconChainServiceClient{cc}
+}
+
+func (c *beaconChainServiceClient) FetchLeaders(ctx context.Context, in *FetchLeadersRequest, opts ...grpc.CallOption) (*FetchLeadersResponse, error) {
+	out := new(FetchLeadersResponse)
+	err := c.cc.Invoke(ctx, "/beaconchain.BeaconChainService/FetchLeaders", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// BeaconChainServiceServer is the server API for BeaconChainService service.
+type BeaconChainServiceServer interface {
+	FetchLeaders(context.Context, *FetchLeadersRequest) (*FetchLeadersResponse, error)
+}
+
+func RegisterBeaconChainServiceServer(s *grpc.Server, srv BeaconChainServiceServer) {
+	s.RegisterService(&_BeaconChainService_serviceDesc, srv)
+}
+
+func _BeaconChainService_FetchLeaders_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(FetchLeadersRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BeaconChainServiceServer).FetchLeaders(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/beaconchain.BeaconChainService/FetchLeaders",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BeaconChainServiceServer).FetchLeaders(ctx, req.(*FetchLeadersRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _BeaconChainService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "beaconchain.BeaconChainService",
+	HandlerType: (*BeaconChainServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "FetchLeaders",
+			Handler:    _BeaconChainService_FetchLeaders_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "beaconchain.proto",
+}

beaconchain/rpc/proto/beaconchain.proto

@@ -0,0 +1,22 @@
+syntax = "proto3";
+
+package beaconchain;
+
+// BeaconChainService is the service used for any beacon chain requests.
+service BeaconChainService {
+  rpc FetchLeaders(FetchLeadersRequest) returns (FetchLeadersResponse) {}
+}
+
+// FetchLeadersRequest is the request to fetch the current leaders.
+message FetchLeadersRequest {
+}
+
+// FetchLeadersResponse is the response of FetchLeadersRequest.
+message FetchLeadersResponse {
+  message Leader {
+      string ip = 1;
+      string port = 2;
+      uint32 shardId = 3;
+  }
+  repeated Leader leaders = 1;
+}

beaconchain/rpc/server.go

@@ -0,0 +1,50 @@
+package beaconchain
+
+import (
+	"context"
+	"github.com/harmony-one/harmony/proto/bcconn"
+	"log"
+	"net"
+
+	"google.golang.org/grpc"
+
+	proto "github.com/harmony-one/harmony/beaconchain/rpc/proto"
+)
+
+// Server is the Server struct for beacon chain package.
+type Server struct {
+	shardLeaderMap func() map[int]*bcconn.NodeInfo
+}
+
+// FetchLeaders implements the FetchLeaders interface to return current leaders.
+func (s *Server) FetchLeaders(ctx context.Context, request *proto.FetchLeadersRequest) (*proto.FetchLeadersResponse, error) {
+	log.Println("Returning FetchLeadersResponse")
+
+	leaders := []*proto.FetchLeadersResponse_Leader{}
+	for shardID, leader := range s.shardLeaderMap() {
+		leaders = append(leaders, &proto.FetchLeadersResponse_Leader{Ip: leader.Self.IP, Port: leader.Self.Port, ShardId: uint32(shardID)})
+	}
+	log.Println(leaders)
+	return &proto.FetchLeadersResponse{Leaders: leaders}, nil
+}
+
+// Start starts the Server on given ip and port.
+func (s *Server) Start(ip, port string) (*grpc.Server, error) {
+	// TODO(minhdoan): Currently not using ip. Fix it later.
+	addr := net.JoinHostPort("", port)
+	lis, err := net.Listen("tcp", addr)
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	var opts []grpc.ServerOption
+	grpcServer := grpc.NewServer(opts...)
+	proto.RegisterBeaconChainServiceServer(grpcServer, s)
+	go grpcServer.Serve(lis)
+	return grpcServer, nil
+}
+
+// NewServer creates new Server which implements BeaconChainServiceServer interface.
+func NewServer(shardLeaderMap func() map[int]*bcconn.NodeInfo) *Server {
+	s := &Server{shardLeaderMap}
+	return s
+}

client/service/client.go

@@ -11,7 +11,7 @@ import (
 	"google.golang.org/grpc"
 )
 
-// Client is the client model for downloader package.
+// Client is the client model for client service.
 type Client struct {
 	clientServiceClient proto.ClientServiceClient
 	opts                []grpc.DialOption
@@ -38,7 +38,7 @@ func (client *Client) Close() {
 	client.conn.Close()
 }
 
-// GetBalance gets block hashes from all the peers by calling grpc request.
+// GetBalance gets account balance from the client service.
 func (client *Client) GetBalance(address common.Address) *proto.FetchAccountStateResponse {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()

client/service/server.go

@@ -12,7 +12,7 @@ import (
 	proto "github.com/harmony-one/harmony/client/service/proto"
 )
 
-// Server is the Server struct for downloader package.
+// Server is the Server struct for client service package.
 type Server struct {
 	stateReader func() (*state.StateDB, error)
 }

client/wallet/main.go

@@ -10,17 +10,17 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	crypto2 "github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/params"
+	libs "github.com/harmony-one/harmony/beaconchain/libs"
+	"github.com/harmony-one/harmony/beaconchain/rpc"
 	client2 "github.com/harmony-one/harmony/client/service"
 	"github.com/harmony-one/harmony/core/types"
+	"github.com/harmony-one/harmony/p2p/p2pimpl"
 	"log"
 	"math/big"
 	"strings"
 
-	"github.com/harmony-one/harmony/p2p/p2pimpl"
-
 	"github.com/harmony-one/harmony/blockchain"
 	"github.com/harmony-one/harmony/client"
-	client_config "github.com/harmony-one/harmony/client/config"
 	"github.com/harmony-one/harmony/node"
 	"github.com/harmony-one/harmony/p2p"
 	proto_node "github.com/harmony-one/harmony/proto/node"
@@ -46,7 +46,7 @@ func main() {
 	transferCommand := flag.NewFlagSet("transfer", flag.ExitOnError)
 	transferSenderPtr := transferCommand.String("from", "0", "Specify the sender account address or index")
 	transferReceiverPtr := transferCommand.String("to", "", "Specify the receiver account")
-	transferAmountPtr := transferCommand.Int("amount", 0, "Specify the amount to transfer")
+	transferAmountPtr := transferCommand.Float64("amount", 0, "Specify the amount to transfer")
 
 	// Verify that a subcommand has been provided
 	// os.Arg[0] is the main command
@@ -114,7 +114,7 @@ func main() {
 		for i, address := range ReadAddresses() {
 			fmt.Printf("Account %d: %s:\n", i, address.Hex())
 			for shardID, balanceNonce := range FetchBalance(address, walletNode) {
-				fmt.Printf("    Balance in Shard %d:  %.2f \n", shardID, float32(balanceNonce.balance.Uint64()/params.Ether))
+				fmt.Printf("    Balance in Shard %d:  %.6f \n", shardID, float32(balanceNonce.balance.Uint64())/params.Ether)
 			}
 		}
 	case "transfer":
@@ -167,10 +167,11 @@ func main() {
 		walletNode := CreateWalletNode()
 		shardIDToAccountState := FetchBalance(senderAddress, walletNode)
 
-		if shardIDToAccountState[0].balance.Uint64()/params.Ether < uint64(amount) {
+		if float64(shardIDToAccountState[0].balance.Uint64())/params.Ether < amount {
-			fmt.Printf("Balance is not enough for the transfer: %d harmony token\n", shardIDToAccountState[0].balance.Uint64()/params.Ether)
+			fmt.Printf("Balance is not enough for the transfer, current balance is %.6f\n", float64(shardIDToAccountState[0].balance.Uint64())/params.Ether)
 			return
 		}
+		fmt.Println(big.NewInt(int64(amount * params.Ether)))
 		tx, _ := types.SignTx(types.NewTransaction(shardIDToAccountState[0].nonce, receiverAddress, 0, big.NewInt(int64(amount*params.Ether)), params.TxGas, nil, nil), types.HomesteadSigner{}, senderPriKey)
 		SubmitTransaction(tx, walletNode)
 	default:
@@ -204,19 +205,17 @@ func getShardIDToLeaderMap() map[uint32]p2p.Peer {
 
 // CreateWalletNode creates wallet server node.
 func CreateWalletNode() *node.Node {
-	configr := client_config.NewConfig()
+	shardIDLeaderMap := make(map[uint32]p2p.Peer)
-	var shardIDLeaderMap map[uint32]p2p.Peer
+
-	var clientPeer *p2p.Peer
+	port, _ := strconv.Atoi("8081")
-	if true {
+	bcClient := beaconchain.NewClient("127.0.0.1", strconv.Itoa(port+libs.BeaconchainServicePortDiff))
-		configr.ReadConfigFile("local_config1.txt")
+	response := bcClient.GetLeaders()
-		shardIDLeaderMap = configr.GetShardIDToLeaderMap()
+
-		clientPeer = configr.GetClientPeer()
+	for _, leader := range response.Leaders {
-	} else {
+		shardIDLeaderMap[leader.ShardId] = p2p.Peer{IP: leader.Ip, Port: leader.Port}
-		shardIDLeaderMap = getShardIDToLeaderMap()
-		clientPeer = &p2p.Peer{Port: "127.0.0.1", IP: "1234"}
 	}
 
-	host := p2pimpl.NewHost(*clientPeer)
+	host := p2pimpl.NewHost(p2p.Peer{})
 	walletNode := node.New(host, nil, nil)
 	walletNode.Client = client.NewClient(walletNode.GetHost(), &shardIDLeaderMap)
 	return walletNode