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net.go
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package core
import (
multihash "gx/ipfs/QmU9a9NV9RdPNwZQDYd5uKsm6N6LJLSvLbywDDYFbaaC6P/go-multihash"
peer "gx/ipfs/QmXYjuNuxVzXKJCfWasQk1RqkhVLDM9jtUKhqc2WPQmFSB/go-libp2p-peer"
libp2p "gx/ipfs/QmaPbCnUMBohSGo3KnxEa2bHqyJVVeEEcwtqJAYxerieBo/go-libp2p-crypto"
"errors"
"github.com/OpenBazaar/openbazaar-go/ipfs"
"github.com/OpenBazaar/openbazaar-go/pb"
"github.com/golang/protobuf/proto"
"github.com/golang/protobuf/ptypes"
"github.com/golang/protobuf/ptypes/any"
"golang.org/x/net/context"
"gx/ipfs/QmNp85zy9RLrQ5oQD4hPyS39ezrrXpcaa7R4Y9kxdWQLLQ/go-cid"
"sync"
"time"
)
const (
CHAT_MESSAGE_MAX_CHARACTERS = 20000
CHAT_SUBJECT_MAX_CHARACTERS = 500
DefaultPointerPrefixLength = 14
)
var OfflineMessageWaitGroup sync.WaitGroup
func (n *OpenBazaarNode) sendMessage(peerId string, k *libp2p.PubKey, message pb.Message) error {
p, err := peer.IDB58Decode(peerId)
if err != nil {
return err
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err = n.Service.SendMessage(ctx, p, &message)
if err != nil {
if err := n.SendOfflineMessage(p, k, &message); err != nil {
return err
}
}
return nil
}
// Supply of a public key is optional, if nil is instead provided n.EncryptMessage does a lookup
func (n *OpenBazaarNode) SendOfflineMessage(p peer.ID, k *libp2p.PubKey, m *pb.Message) error {
pubKeyBytes, err := n.IpfsNode.PrivateKey.GetPublic().Bytes()
if err != nil {
return err
}
ser, err := proto.Marshal(m)
if err != nil {
return err
}
sig, err := n.IpfsNode.PrivateKey.Sign(ser)
if err != nil {
return err
}
env := pb.Envelope{Message: m, Pubkey: pubKeyBytes, Signature: sig}
messageBytes, merr := proto.Marshal(&env)
if merr != nil {
return merr
}
ciphertext, cerr := n.EncryptMessage(p, k, messageBytes)
if cerr != nil {
return cerr
}
addr, aerr := n.MessageStorage.Store(p, ciphertext)
if aerr != nil {
return aerr
}
mh, mherr := multihash.FromB58String(p.Pretty())
if mherr != nil {
return mherr
}
/* TODO: We are just using a default prefix length for now. Eventually we will want to customize this,
but we will need some way to get the recipient's desired prefix length. Likely will be in profile. */
pointer, err := ipfs.NewPointer(mh, DefaultPointerPrefixLength, addr, ciphertext)
if err != nil {
return err
}
if m.MessageType != pb.Message_OFFLINE_ACK {
pointer.Purpose = ipfs.MESSAGE
pointer.CancelID = &p
err = n.Datastore.Pointers().Put(pointer)
if err != nil {
return err
}
}
log.Debugf("Sending offline message to: %s, Message Type: %s, PointerID: %s, Location: %s", p.Pretty(), m.MessageType.String(), pointer.Cid.String(), pointer.Value.Addrs[0].String())
OfflineMessageWaitGroup.Add(1)
go func() {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err := ipfs.PublishPointer(n.IpfsNode, ctx, pointer)
if err != nil {
log.Error(err)
}
// Push provider to our push nodes for redundancy
for _, p := range n.PushNodes {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err := ipfs.PutPointerToPeer(n.IpfsNode, ctx, p, pointer)
if err != nil {
log.Error(err)
}
}
OfflineMessageWaitGroup.Done()
}()
return nil
}
func (n *OpenBazaarNode) SendOfflineAck(peerId string, pointerID peer.ID) error {
a := &any.Any{Value: []byte(pointerID.Pretty())}
m := pb.Message{
MessageType: pb.Message_OFFLINE_ACK,
Payload: a}
return n.sendMessage(peerId, nil, m)
}
func (n *OpenBazaarNode) GetPeerStatus(peerId string) (string, error) {
p, err := peer.IDB58Decode(peerId)
if err != nil {
return "", err
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
m := pb.Message{MessageType: pb.Message_PING}
_, err = n.Service.SendRequest(ctx, p, &m)
if err != nil {
return "offline", nil
}
return "online", nil
}
func (n *OpenBazaarNode) Follow(peerId string) error {
m := pb.Message{MessageType: pb.Message_FOLLOW}
pubkey := n.IpfsNode.PrivateKey.GetPublic()
pubkeyBytes, err := pubkey.Bytes()
if err != nil {
return err
}
ts, err := ptypes.TimestampProto(time.Now())
if err != nil {
return err
}
data := &pb.SignedData_Command{
PeerID: peerId,
Type: pb.Message_FOLLOW,
Timestamp: ts,
}
ser, err := proto.Marshal(data)
if err != nil {
return err
}
sig, err := n.IpfsNode.PrivateKey.Sign(ser)
if err != nil {
return err
}
sd := &pb.SignedData{
SerializedData: ser,
SenderPubkey: pubkeyBytes,
Signature: sig,
}
any, err := ptypes.MarshalAny(sd)
if err != nil {
return err
}
m.Payload = any
err = n.sendMessage(peerId, nil, m)
if err != nil {
return err
}
err = n.Datastore.Following().Put(peerId)
if err != nil {
return err
}
err = n.UpdateFollow()
if err != nil {
return err
}
return nil
}
func (n *OpenBazaarNode) Unfollow(peerId string) error {
m := pb.Message{MessageType: pb.Message_UNFOLLOW}
pubkey := n.IpfsNode.PrivateKey.GetPublic()
pubkeyBytes, err := pubkey.Bytes()
if err != nil {
return err
}
ts, err := ptypes.TimestampProto(time.Now())
if err != nil {
return err
}
data := &pb.SignedData_Command{
PeerID: peerId,
Type: pb.Message_UNFOLLOW,
Timestamp: ts,
}
ser, err := proto.Marshal(data)
if err != nil {
return err
}
sig, err := n.IpfsNode.PrivateKey.Sign(ser)
if err != nil {
return err
}
sd := &pb.SignedData{
SerializedData: ser,
SenderPubkey: pubkeyBytes,
Signature: sig,
}
any, err := ptypes.MarshalAny(sd)
if err != nil {
return err
}
m.Payload = any
err = n.sendMessage(peerId, nil, m)
if err != nil {
return err
}
err = n.Datastore.Following().Delete(peerId)
if err != nil {
return err
}
err = n.UpdateFollow()
if err != nil {
return err
}
return nil
}
func (n *OpenBazaarNode) SendOrder(peerId string, contract *pb.RicardianContract) (resp *pb.Message, err error) {
p, err := peer.IDB58Decode(peerId)
if err != nil {
return resp, err
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
any, err := ptypes.MarshalAny(contract)
if err != nil {
return resp, err
}
m := pb.Message{
MessageType: pb.Message_ORDER,
Payload: any,
}
resp, err = n.Service.SendRequest(ctx, p, &m)
if err != nil {
return resp, err
}
return resp, nil
}
func (n *OpenBazaarNode) SendError(peerId string, k *libp2p.PubKey, errorMessage pb.Message) error {
return n.sendMessage(peerId, k, errorMessage)
}
func (n *OpenBazaarNode) SendOrderConfirmation(peerId string, contract *pb.RicardianContract) error {
a, err := ptypes.MarshalAny(contract)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_ORDER_CONFIRMATION,
Payload: a,
}
k, err := libp2p.UnmarshalPublicKey(contract.GetBuyerOrder().GetBuyerID().GetPubkeys().Identity)
if err != nil {
return err
}
return n.sendMessage(peerId, &k, m)
}
func (n *OpenBazaarNode) SendCancel(peerId, orderId string) error {
a := &any.Any{Value: []byte(orderId)}
m := pb.Message{
MessageType: pb.Message_ORDER_CANCEL,
Payload: a,
}
//try to get public key from order
order, _, _, _, _, err := n.Datastore.Purchases().GetByOrderId(orderId)
var kp *libp2p.PubKey
if err != nil { //probably implies we can't find the order in the Datastore
kp = nil //instead SendOfflineMessage can try to get the key from the peerId
} else {
k, err := libp2p.UnmarshalPublicKey(order.GetVendorListings()[0].GetVendorID().GetPubkeys().Identity)
if err != nil {
return err
}
kp = &k
}
return n.sendMessage(peerId, kp, m)
}
func (n *OpenBazaarNode) SendReject(peerId string, rejectMessage *pb.OrderReject) error {
a, err := ptypes.MarshalAny(rejectMessage)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_ORDER_REJECT,
Payload: a,
}
var kp *libp2p.PubKey
//try to get public key from order
order, _, _, _, _, err := n.Datastore.Sales().GetByOrderId(rejectMessage.OrderID)
if err != nil { //probably implies we can't find the order in the Datastore
kp = nil //instead SendOfflineMessage can try to get the key from the peerId
} else {
k, err := libp2p.UnmarshalPublicKey(order.GetBuyerOrder().GetBuyerID().GetPubkeys().Identity)
if err != nil {
return err
}
kp = &k
}
return n.sendMessage(peerId, kp, m)
}
func (n *OpenBazaarNode) SendRefund(peerId string, refundMessage *pb.RicardianContract) error {
a, err := ptypes.MarshalAny(refundMessage)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_REFUND,
Payload: a,
}
k, err := libp2p.UnmarshalPublicKey(refundMessage.GetBuyerOrder().GetBuyerID().GetPubkeys().Identity)
if err != nil {
return err
}
return n.sendMessage(peerId, &k, m)
}
func (n *OpenBazaarNode) SendOrderFulfillment(peerId string, k *libp2p.PubKey, fulfillmentMessage *pb.RicardianContract) error {
a, err := ptypes.MarshalAny(fulfillmentMessage)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_ORDER_FULFILLMENT,
Payload: a,
}
return n.sendMessage(peerId, k, m)
}
func (n *OpenBazaarNode) SendOrderCompletion(peerId string, k *libp2p.PubKey, completionMessage *pb.RicardianContract) error {
a, err := ptypes.MarshalAny(completionMessage)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_ORDER_COMPLETION,
Payload: a,
}
if err != nil {
return err
}
return n.sendMessage(peerId, k, m)
}
func (n *OpenBazaarNode) SendDisputeOpen(peerId string, k *libp2p.PubKey, disputeMessage *pb.RicardianContract) error {
a, err := ptypes.MarshalAny(disputeMessage)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_DISPUTE_OPEN,
Payload: a,
}
return n.sendMessage(peerId, k, m)
}
func (n *OpenBazaarNode) SendDisputeUpdate(peerId string, updateMessage *pb.DisputeUpdate) error {
a, err := ptypes.MarshalAny(updateMessage)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_DISPUTE_UPDATE,
Payload: a,
}
return n.sendMessage(peerId, nil, m)
}
func (n *OpenBazaarNode) SendDisputeClose(peerId string, k *libp2p.PubKey, resolutionMessage *pb.RicardianContract) error {
a, err := ptypes.MarshalAny(resolutionMessage)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_DISPUTE_CLOSE,
Payload: a,
}
return n.sendMessage(peerId, k, m)
}
func (n *OpenBazaarNode) SendChat(peerId string, chatMessage *pb.Chat) error {
a, err := ptypes.MarshalAny(chatMessage)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_CHAT,
Payload: a,
}
p, err := peer.IDB58Decode(peerId)
if err != nil {
return err
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err = n.Service.SendMessage(ctx, p, &m)
if err != nil && chatMessage.Flag != pb.Chat_TYPING {
if err := n.SendOfflineMessage(p, nil, &m); err != nil {
return err
}
}
return nil
}
func (n *OpenBazaarNode) SendModeratorAdd(peerId string) error {
m := pb.Message{MessageType: pb.Message_MODERATOR_ADD}
pubkey := n.IpfsNode.PrivateKey.GetPublic()
pubkeyBytes, err := pubkey.Bytes()
if err != nil {
return err
}
ts, err := ptypes.TimestampProto(time.Now())
if err != nil {
return err
}
data := &pb.SignedData_Command{
PeerID: peerId,
Type: pb.Message_MODERATOR_ADD,
Timestamp: ts,
}
ser, err := proto.Marshal(data)
if err != nil {
return err
}
sig, err := n.IpfsNode.PrivateKey.Sign(ser)
if err != nil {
return err
}
sd := &pb.SignedData{
SerializedData: ser,
SenderPubkey: pubkeyBytes,
Signature: sig,
}
any, err := ptypes.MarshalAny(sd)
if err != nil {
return err
}
m.Payload = any
err = n.sendMessage(peerId, nil, m)
if err != nil {
return err
}
return nil
}
func (n *OpenBazaarNode) SendModeratorRemove(peerId string) error {
m := pb.Message{MessageType: pb.Message_MODERATOR_REMOVE}
pubkey := n.IpfsNode.PrivateKey.GetPublic()
pubkeyBytes, err := pubkey.Bytes()
if err != nil {
return err
}
ts, err := ptypes.TimestampProto(time.Now())
if err != nil {
return err
}
data := &pb.SignedData_Command{
PeerID: peerId,
Type: pb.Message_MODERATOR_REMOVE,
Timestamp: ts,
}
ser, err := proto.Marshal(data)
if err != nil {
return err
}
sig, err := n.IpfsNode.PrivateKey.Sign(ser)
if err != nil {
return err
}
sd := &pb.SignedData{
SerializedData: ser,
SenderPubkey: pubkeyBytes,
Signature: sig,
}
any, err := ptypes.MarshalAny(sd)
if err != nil {
return err
}
m.Payload = any
err = n.sendMessage(peerId, nil, m)
if err != nil {
return err
}
return nil
}
func (n *OpenBazaarNode) SendBlock(peerId string, id cid.Cid) error {
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
block, err := n.IpfsNode.Blocks.GetBlock(ctx, &id)
if err != nil {
return err
}
b := &pb.Block{
Cid: block.Cid().String(),
RawData: block.RawData(),
}
a, err := ptypes.MarshalAny(b)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_BLOCK,
Payload: a,
}
p, err := peer.IDB58Decode(peerId)
if err != nil {
return err
}
return n.Service.SendMessage(context.Background(), p, &m)
}
func (n *OpenBazaarNode) SendStore(peerId string, ids []cid.Cid) error {
var s []string
for _, d := range ids {
s = append(s, d.String())
}
cList := new(pb.CidList)
cList.Cids = s
a, err := ptypes.MarshalAny(cList)
if err != nil {
return err
}
m := pb.Message{
MessageType: pb.Message_STORE,
Payload: a,
}
p, err := peer.IDB58Decode(peerId)
if err != nil {
return err
}
pmes, err := n.Service.SendRequest(context.Background(), p, &m)
if err != nil {
return err
}
defer n.Service.DisconnectFromPeer(p)
if pmes.Payload == nil {
return errors.New("Peer responded with nil payload")
}
if pmes.MessageType == pb.Message_ERROR {
log.Errorf("Error response from %s: %s", peerId, string(pmes.Payload.Value))
return errors.New("Peer responded with error message")
}
resp := new(pb.CidList)
err = ptypes.UnmarshalAny(pmes.Payload, resp)
if err != nil {
return err
}
if len(resp.Cids) == 0 {
log.Debugf("Peer %s requested no blocks", peerId)
return nil
}
log.Debugf("Sending %d blocks to %s", len(resp.Cids), peerId)
for _, id := range resp.Cids {
decoded, err := cid.Decode(id)
if err != nil {
continue
}
n.SendBlock(peerId, *decoded)
}
return nil
}