mirror of https://github.com/status-im/go-waku.git
526 lines
13 KiB
Go
526 lines
13 KiB
Go
package main
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import (
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"chat2/pb"
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"context"
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"crypto/sha256"
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"encoding/hex"
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"errors"
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/libp2p/go-libp2p/core/peer"
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"github.com/multiformats/go-multiaddr"
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"github.com/status-im/go-waku/waku/v2/dnsdisc"
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"github.com/status-im/go-waku/waku/v2/node"
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"github.com/status-im/go-waku/waku/v2/protocol"
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"github.com/status-im/go-waku/waku/v2/protocol/filter"
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"github.com/status-im/go-waku/waku/v2/protocol/lightpush"
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wpb "github.com/status-im/go-waku/waku/v2/protocol/pb"
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"github.com/status-im/go-waku/waku/v2/protocol/relay"
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"github.com/status-im/go-waku/waku/v2/protocol/store"
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"github.com/status-im/go-waku/waku/v2/utils"
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"github.com/waku-org/go-zerokit-rln/rln"
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"golang.org/x/crypto/pbkdf2"
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"google.golang.org/protobuf/proto"
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)
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// Chat represents a subscription to a single PubSub topic. Messages
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// can be published to the topic with Chat.Publish, and received
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// messages are pushed to the Messages channel.
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type Chat struct {
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ctx context.Context
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wg sync.WaitGroup
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node *node.WakuNode
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ui UI
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uiReady chan struct{}
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inputChan chan string
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options Options
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C chan *protocol.Envelope
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nick string
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}
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func NewChat(ctx context.Context, node *node.WakuNode, options Options) *Chat {
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chat := &Chat{
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ctx: ctx,
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node: node,
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options: options,
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nick: options.Nickname,
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uiReady: make(chan struct{}, 1),
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inputChan: make(chan string, 100),
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}
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chat.ui = NewUIModel(chat.uiReady, chat.inputChan)
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if options.Filter.Enable {
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cf := filter.ContentFilter{
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Topic: relay.DefaultWakuTopic,
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ContentTopics: []string{options.ContentTopic},
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}
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var err error
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var filterOpt filter.FilterSubscribeOption
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peerID, err := options.Filter.NodePeerID()
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if err != nil {
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filterOpt = filter.WithAutomaticPeerSelection()
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} else {
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filterOpt = filter.WithPeer(peerID)
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chat.ui.InfoMessage(fmt.Sprintf("Subscribing to filter node %s", peerID))
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}
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_, theFilter, err := node.Filter().Subscribe(ctx, cf, filterOpt)
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if err != nil {
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chat.ui.ErrorMessage(err)
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} else {
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chat.C = theFilter.Chan
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}
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} else {
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sub, err := node.Relay().Subscribe(ctx)
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if err != nil {
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chat.ui.ErrorMessage(err)
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} else {
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chat.C = sub.C
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}
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}
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chat.wg.Add(6)
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go chat.parseInput()
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go chat.receiveMessages()
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connectionWg := sync.WaitGroup{}
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connectionWg.Add(2)
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go chat.welcomeMessage()
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go chat.staticNodes(&connectionWg)
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go chat.discoverNodes(&connectionWg)
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go chat.retrieveHistory(&connectionWg)
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return chat
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}
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func (c *Chat) Stop() {
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c.wg.Wait()
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close(c.inputChan)
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}
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func (c *Chat) receiveMessages() {
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defer c.wg.Done()
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for {
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select {
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case <-c.ctx.Done():
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return
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case value := <-c.C:
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msgContentTopic := value.Message().ContentTopic
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if msgContentTopic != c.options.ContentTopic || (c.options.RLNRelay.Enable && msgContentTopic != c.options.RLNRelay.ContentTopic) {
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continue // Discard messages from other topics
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}
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msg, err := decodeMessage(c.options.UsePayloadV1, c.options.ContentTopic, value.Message())
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if err == nil {
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// send valid messages to the UI
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c.ui.ChatMessage(int64(msg.Timestamp), msg.Nick, string(msg.Payload))
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}
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}
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}
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}
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func (c *Chat) parseInput() {
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defer c.wg.Done()
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for {
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select {
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case <-c.ctx.Done():
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return
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case line := <-c.inputChan:
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c.ui.SetSending(true)
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go func() {
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defer c.ui.SetSending(false)
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// bail if requested
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if line == "/exit" {
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c.ui.Quit()
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fmt.Println("Bye!")
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return
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}
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// add peer
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if strings.HasPrefix(line, "/connect") {
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peer := strings.TrimPrefix(line, "/connect ")
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c.wg.Add(1)
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go func(peer string) {
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defer c.wg.Done()
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ma, err := multiaddr.NewMultiaddr(peer)
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if err != nil {
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c.ui.ErrorMessage(err)
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return
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}
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peerID, err := ma.ValueForProtocol(multiaddr.P_P2P)
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if err != nil {
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c.ui.ErrorMessage(err)
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return
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}
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c.ui.InfoMessage(fmt.Sprintf("Connecting to peer: %s", peerID))
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ctx, cancel := context.WithTimeout(c.ctx, time.Duration(10)*time.Second)
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defer cancel()
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err = c.node.DialPeerWithMultiAddress(ctx, ma)
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if err != nil {
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c.ui.ErrorMessage(err)
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} else {
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c.ui.InfoMessage(fmt.Sprintf("Connected to %s", peerID))
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}
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}(peer)
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return
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}
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// list peers
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if line == "/peers" {
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peers := c.node.Host().Network().Peers()
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if len(peers) == 0 {
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c.ui.InfoMessage("No peers available")
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} else {
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peerInfoMsg := "Peers: \n"
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for _, p := range peers {
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peerInfo := c.node.Host().Peerstore().PeerInfo(p)
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peerProtocols, err := c.node.Host().Peerstore().GetProtocols(p)
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if err != nil {
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c.ui.ErrorMessage(err)
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return
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}
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peerInfoMsg += fmt.Sprintf(" Protocols: %s\n", strings.Join(peerProtocols, ", "))
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peerInfoMsg += " Addresses:\n"
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peerInfoMsg += fmt.Sprintf(" - %s:\n", p.Pretty())
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for _, addr := range peerInfo.Addrs {
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peerInfoMsg += fmt.Sprintf(" %s/p2p/%s\n", addr.String(), p.Pretty())
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}
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}
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c.ui.InfoMessage(peerInfoMsg)
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}
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return
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}
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// change nick
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if strings.HasPrefix(line, "/nick") {
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newNick := strings.TrimSpace(strings.TrimPrefix(line, "/nick "))
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if newNick != "" {
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c.nick = newNick
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} else {
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c.ui.ErrorMessage(errors.New("invalid nickname"))
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}
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return
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}
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if line == "/help" {
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c.ui.InfoMessage(`Available commands:
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/connect multiaddress - dials a node adding it to the list of connected peers
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/peers - list of peers connected to this node
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/nick newNick - change the user's nickname
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/exit - closes the app`)
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return
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}
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c.SendMessage(line)
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}()
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}
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}
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}
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func (c *Chat) SendMessage(line string) {
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tCtx, cancel := context.WithTimeout(c.ctx, 3*time.Second)
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defer func() {
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cancel()
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}()
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err := c.publish(tCtx, line)
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if err != nil {
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if err.Error() == "validation failed" {
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err = errors.New("message rate violation!")
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}
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c.ui.ErrorMessage(err)
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}
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}
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func (c *Chat) publish(ctx context.Context, message string) error {
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msg := &pb.Chat2Message{
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Timestamp: uint64(time.Now().Unix()),
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Nick: c.nick,
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Payload: []byte(message),
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}
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msgBytes, err := proto.Marshal(msg)
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if err != nil {
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return err
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}
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var version uint32
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var t = time.Now()
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var timestamp int64 = utils.GetUnixEpochFrom(t)
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var keyInfo *node.KeyInfo = &node.KeyInfo{}
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if c.options.UsePayloadV1 { // Use WakuV1 encryption
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keyInfo.Kind = node.Symmetric
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keyInfo.SymKey = generateSymKey(c.options.ContentTopic)
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version = 1
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} else {
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keyInfo.Kind = node.None
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version = 0
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}
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p := new(node.Payload)
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p.Data = msgBytes
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p.Key = keyInfo
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payload, err := p.Encode(version)
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if err != nil {
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return err
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}
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wakuMsg := &wpb.WakuMessage{
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Payload: payload,
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Version: version,
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ContentTopic: options.ContentTopic,
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Timestamp: timestamp,
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}
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if c.options.RLNRelay.Enable {
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// for future version when we support more than one rln protected content topic,
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// we should check the message content topic as well
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err = c.node.RLNRelay().AppendRLNProof(wakuMsg, t)
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if err != nil {
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return err
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}
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c.ui.InfoMessage(fmt.Sprintf("RLN Epoch: %d", rln.BytesToEpoch(wakuMsg.RateLimitProof.Epoch).Uint64()))
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}
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if c.options.LightPush.Enable {
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var lightOpt lightpush.LightPushOption
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var peerID peer.ID
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peerID, err = options.LightPush.NodePeerID()
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if err != nil {
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lightOpt = lightpush.WithAutomaticPeerSelection()
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} else {
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lightOpt = lightpush.WithPeer(peerID)
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}
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_, err = c.node.Lightpush().Publish(c.ctx, wakuMsg, lightOpt)
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} else {
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_, err = c.node.Relay().Publish(ctx, wakuMsg)
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}
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return err
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}
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func decodeMessage(useV1Payload bool, contentTopic string, wakumsg *wpb.WakuMessage) (*pb.Chat2Message, error) {
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var keyInfo *node.KeyInfo = &node.KeyInfo{}
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if useV1Payload { // Use WakuV1 encryption
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keyInfo.Kind = node.Symmetric
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keyInfo.SymKey = generateSymKey(contentTopic)
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} else {
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keyInfo.Kind = node.None
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}
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payload, err := node.DecodePayload(wakumsg, keyInfo)
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if err != nil {
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return nil, err
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}
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msg := &pb.Chat2Message{}
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if err := proto.Unmarshal(payload.Data, msg); err != nil {
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return nil, err
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}
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return msg, nil
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}
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func generateSymKey(password string) []byte {
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// AesKeyLength represents the length (in bytes) of an private key
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AESKeyLength := 256 / 8
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return pbkdf2.Key([]byte(password), nil, 65356, AESKeyLength, sha256.New)
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}
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func (c *Chat) retrieveHistory(connectionWg *sync.WaitGroup) {
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defer c.wg.Done()
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connectionWg.Wait() // Wait until node connection operations are done
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if !c.options.Store.Enable {
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return
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}
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var storeOpt store.HistoryRequestOption
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if c.options.Store.Node == nil {
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c.ui.InfoMessage("No store node configured. Choosing one at random...")
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storeOpt = store.WithAutomaticPeerSelection()
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} else {
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peerID, err := (*c.options.Store.Node).ValueForProtocol(multiaddr.P_P2P)
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if err != nil {
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c.ui.ErrorMessage(err)
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return
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}
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pID, err := peer.Decode(peerID)
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if err != nil {
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c.ui.ErrorMessage(err)
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return
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}
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storeOpt = store.WithPeer(pID)
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c.ui.InfoMessage(fmt.Sprintf("Querying historic messages from %s", peerID))
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}
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tCtx, cancel := context.WithTimeout(c.ctx, 10*time.Second)
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defer cancel()
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q := store.Query{
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ContentTopics: []string{options.ContentTopic},
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}
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response, err := c.node.Store().Query(tCtx, q,
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store.WithAutomaticRequestId(),
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storeOpt,
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store.WithPaging(false, 100))
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if err != nil {
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c.ui.ErrorMessage(fmt.Errorf("could not query storenode: %w", err))
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} else {
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if len(response.Messages) == 0 {
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c.ui.InfoMessage("0 historic messages available")
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} else {
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for _, msg := range response.Messages {
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c.C <- protocol.NewEnvelope(msg, msg.Timestamp, relay.DefaultWakuTopic)
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}
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}
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}
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}
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func (c *Chat) staticNodes(connectionWg *sync.WaitGroup) {
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defer c.wg.Done()
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defer connectionWg.Done()
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<-c.uiReady // wait until UI is ready
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wg := sync.WaitGroup{}
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wg.Add(len(options.StaticNodes))
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for _, n := range options.StaticNodes {
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go func(addr multiaddr.Multiaddr) {
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defer wg.Done()
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ctx, cancel := context.WithTimeout(c.ctx, time.Duration(10)*time.Second)
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defer cancel()
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peerID, err := addr.ValueForProtocol(multiaddr.P_P2P)
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if err != nil {
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c.ui.ErrorMessage(err)
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return
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}
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c.ui.InfoMessage(fmt.Sprintf("Connecting to %s", addr.String()))
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err = c.node.DialPeerWithMultiAddress(ctx, addr)
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if err != nil {
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c.ui.ErrorMessage(err)
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} else {
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c.ui.InfoMessage(fmt.Sprintf("Connected to %s", peerID))
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}
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}(n)
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}
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wg.Wait()
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}
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func (c *Chat) welcomeMessage() {
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defer c.wg.Done()
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<-c.uiReady // wait until UI is ready
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c.ui.InfoMessage("Welcome, " + c.nick + "!")
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c.ui.InfoMessage("type /help to see available commands \n")
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addrMessage := "Listening on:\n"
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for _, addr := range c.node.ListenAddresses() {
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addrMessage += " -" + addr.String() + "\n"
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}
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c.ui.InfoMessage(addrMessage)
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if !c.options.RLNRelay.Enable {
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return
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}
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idKey := c.node.RLNRelay().MembershipKeyPair().IDKey
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idCommitment := c.node.RLNRelay().MembershipKeyPair().IDCommitment
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rlnMessage := "RLN config:\n"
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rlnMessage += fmt.Sprintf("- Your membership index is: %d\n", uint(c.node.RLNRelay().MembershipIndex()))
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rlnMessage += fmt.Sprintf("- Your rln identity key is: 0x%s\n", hex.EncodeToString(idKey[:]))
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rlnMessage += fmt.Sprintf("- Your rln identity commitment key is: 0x%s\n", hex.EncodeToString(idCommitment[:]))
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c.ui.InfoMessage(rlnMessage)
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}
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func (c *Chat) discoverNodes(connectionWg *sync.WaitGroup) {
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defer c.wg.Done()
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defer connectionWg.Done()
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<-c.uiReady // wait until UI is ready
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var dnsDiscoveryUrl string
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if options.Fleet != fleetNone {
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if options.Fleet == fleetTest {
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dnsDiscoveryUrl = "enrtree://AOGECG2SPND25EEFMAJ5WF3KSGJNSGV356DSTL2YVLLZWIV6SAYBM@test.waku.nodes.status.im"
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} else {
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// Connect to prod by default
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dnsDiscoveryUrl = "enrtree://AOGECG2SPND25EEFMAJ5WF3KSGJNSGV356DSTL2YVLLZWIV6SAYBM@prod.waku.nodes.status.im"
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}
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}
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if options.DNSDiscovery.Enable && options.DNSDiscovery.URL != "" {
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dnsDiscoveryUrl = options.DNSDiscovery.URL
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}
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if dnsDiscoveryUrl != "" {
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c.ui.InfoMessage(fmt.Sprintf("attempting DNS discovery with %s", dnsDiscoveryUrl))
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nodes, err := dnsdisc.RetrieveNodes(c.ctx, dnsDiscoveryUrl, dnsdisc.WithNameserver(options.DNSDiscovery.Nameserver))
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if err != nil {
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c.ui.ErrorMessage(errors.New(err.Error()))
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} else {
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var nodeList []multiaddr.Multiaddr
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for _, n := range nodes {
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nodeList = append(nodeList, n.Addresses...)
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}
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c.ui.InfoMessage(fmt.Sprintf("Discovered and connecting to %v ", nodeList))
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wg := sync.WaitGroup{}
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wg.Add(len(nodeList))
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for _, n := range nodeList {
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go func(ctx context.Context, addr multiaddr.Multiaddr) {
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defer wg.Done()
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peerID, err := addr.ValueForProtocol(multiaddr.P_P2P)
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if err != nil {
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c.ui.ErrorMessage(err)
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return
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}
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ctx, cancel := context.WithTimeout(ctx, time.Duration(10)*time.Second)
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defer cancel()
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err = c.node.DialPeerWithMultiAddress(ctx, addr)
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if err != nil {
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c.ui.ErrorMessage(fmt.Errorf("could not connect to %s: %w", peerID, err))
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} else {
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c.ui.InfoMessage(fmt.Sprintf("Connected to %s", peerID))
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}
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}(c.ctx, n)
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}
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wg.Wait()
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}
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}
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}
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