mirror of https://github.com/status-im/go-waku.git
483 lines
12 KiB
Go
483 lines
12 KiB
Go
// Implements gomobile bindings for go-waku. Contains a set of functions that
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// are exported when go-waku is exported as libraries for mobile devices
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package gowaku
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import (
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"context"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"database/sql"
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"encoding/hex"
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"encoding/json"
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"errors"
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"fmt"
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"net"
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"time"
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"go.uber.org/zap/zapcore"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/crypto/secp256k1"
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"github.com/ethereum/go-ethereum/p2p/enode"
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pubsub "github.com/libp2p/go-libp2p-pubsub"
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"github.com/libp2p/go-libp2p/core/peer"
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libp2pProtocol "github.com/libp2p/go-libp2p/core/protocol"
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"github.com/multiformats/go-multiaddr"
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"github.com/waku-org/go-waku/waku/persistence"
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dbutils "github.com/waku-org/go-waku/waku/persistence/utils"
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"github.com/waku-org/go-waku/waku/v2/node"
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"github.com/waku-org/go-waku/waku/v2/payload"
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"github.com/waku-org/go-waku/waku/v2/peerstore"
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"github.com/waku-org/go-waku/waku/v2/protocol"
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"github.com/waku-org/go-waku/waku/v2/protocol/pb"
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"github.com/waku-org/go-waku/waku/v2/utils"
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)
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type WakuState struct {
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ctx context.Context
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cancel context.CancelFunc
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node *node.WakuNode
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relayTopics []string
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}
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var wakuState WakuState
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var errWakuNodeNotReady = errors.New("go-waku not initialized")
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func randomHex(n int) (string, error) {
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bytes := make([]byte, n)
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if _, err := rand.Read(bytes); err != nil {
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return "", err
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}
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return hex.EncodeToString(bytes), nil
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}
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func NewNode(configJSON string) string {
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if wakuState.node != nil {
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return MakeJSONResponse(errors.New("go-waku already initialized. stop it first"))
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}
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config, err := getConfig(configJSON)
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if err != nil {
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return MakeJSONResponse(err)
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}
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hostAddr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("%s:%d", *config.Host, *config.Port))
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if err != nil {
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return MakeJSONResponse(err)
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}
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var prvKey *ecdsa.PrivateKey
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if config.NodeKey != nil {
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prvKey, err = crypto.HexToECDSA(*config.NodeKey)
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if err != nil {
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return MakeJSONResponse(err)
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}
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} else {
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key, err := randomHex(32)
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if err != nil {
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return MakeJSONResponse(err)
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}
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prvKey, err = crypto.HexToECDSA(key)
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if err != nil {
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return MakeJSONResponse(err)
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}
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}
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opts := []node.WakuNodeOption{
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node.WithPrivateKey(prvKey),
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node.WithHostAddress(hostAddr),
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node.WithKeepAlive(time.Duration(*config.KeepAliveInterval) * time.Second),
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}
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if *config.EnableRelay {
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var pubsubOpt []pubsub.Option
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if config.GossipSubParams != nil {
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params := GetGossipSubParams(config.GossipSubParams)
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pubsubOpt = append(pubsubOpt, pubsub.WithGossipSubParams(params))
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}
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pubsubOpt = append(pubsubOpt, pubsub.WithSeenMessagesTTL(getSeenTTL(config)))
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opts = append(opts, node.WithWakuRelayAndMinPeers(*config.MinPeersToPublish, pubsubOpt...))
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}
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if config.DNS4DomainName != "" {
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opts = append(opts, node.WithDns4Domain(config.DNS4DomainName))
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}
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if config.Websockets.Enabled {
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if config.Websockets.Secure {
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if config.DNS4DomainName == "" {
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utils.Logger().Warn("using secure websockets without a dns4 domain name might indicate a misconfiguration")
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}
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opts = append(opts, node.WithSecureWebsockets(config.Websockets.Host, *config.Websockets.Port, config.Websockets.CertPath, config.Websockets.KeyPath))
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} else {
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opts = append(opts, node.WithWebsockets(config.Websockets.Host, *config.Websockets.Port))
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}
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}
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if *config.EnableLegacyFilter {
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opts = append(opts, node.WithLegacyWakuFilter(false))
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}
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opts = append(opts, node.WithWakuFilterLightNode())
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if *config.EnableStore {
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var db *sql.DB
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var migrationFn func(*sql.DB) error
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db, migrationFn, err = dbutils.ExtractDBAndMigration(*config.DatabaseURL)
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if err != nil {
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return MakeJSONResponse(err)
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}
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opts = append(opts, node.WithWakuStore())
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dbStore, err := persistence.NewDBStore(utils.Logger(),
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persistence.WithDB(db),
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persistence.WithMigrations(migrationFn),
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persistence.WithRetentionPolicy(*config.RetentionMaxMessages, time.Duration(*config.RetentionTimeSeconds)*time.Second),
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)
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if err != nil {
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return MakeJSONResponse(err)
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}
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opts = append(opts, node.WithMessageProvider(dbStore))
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}
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if *config.EnableDiscV5 {
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var bootnodes []*enode.Node
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for _, addr := range config.DiscV5BootstrapNodes {
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bootnode, err := enode.Parse(enode.ValidSchemes, addr)
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if err != nil {
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return MakeJSONResponse(err)
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}
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bootnodes = append(bootnodes, bootnode)
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}
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opts = append(opts, node.WithDiscoveryV5(*config.DiscV5UDPPort, bootnodes, true))
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}
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wakuState.relayTopics = config.RelayTopics
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lvl, err := zapcore.ParseLevel(*config.LogLevel)
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if err != nil {
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return MakeJSONResponse(err)
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}
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opts = append(opts, node.WithLogLevel(lvl))
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w, err := node.New(opts...)
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if err != nil {
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return MakeJSONResponse(err)
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}
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wakuState.node = w
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return MakeJSONResponse(nil)
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}
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func Start() string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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wakuState.ctx, wakuState.cancel = context.WithCancel(context.Background())
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if err := wakuState.node.Start(wakuState.ctx); err != nil {
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return MakeJSONResponse(err)
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}
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if wakuState.node.DiscV5() != nil {
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if err := wakuState.node.DiscV5().Start(context.Background()); err != nil {
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wakuState.node.Stop()
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return MakeJSONResponse(err)
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}
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}
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for _, topic := range wakuState.relayTopics {
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err := relaySubscribe(topic)
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if err != nil {
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wakuState.node.Stop()
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return MakeJSONResponse(err)
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}
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}
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return MakeJSONResponse(nil)
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}
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func Stop() string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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wakuState.node.Stop()
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wakuState.cancel()
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wakuState.node = nil
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return MakeJSONResponse(nil)
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}
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func IsStarted() string {
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return PrepareJSONResponse(wakuState.node != nil, nil)
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}
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func PeerID() string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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return PrepareJSONResponse(wakuState.node.ID(), nil)
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}
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func ListenAddresses() string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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var addresses []string
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for _, addr := range wakuState.node.ListenAddresses() {
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addresses = append(addresses, addr.String())
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}
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return PrepareJSONResponse(addresses, nil)
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}
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func AddPeer(address string, protocolID string) string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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ma, err := multiaddr.NewMultiaddr(address)
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if err != nil {
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return MakeJSONResponse(err)
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}
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peerID, err := wakuState.node.AddPeer(ma, peerstore.Static, libp2pProtocol.ID(protocolID))
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return PrepareJSONResponse(peerID, err)
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}
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func Connect(address string, ms int) string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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var ctx context.Context
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var cancel context.CancelFunc
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if ms > 0 {
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ctx, cancel = context.WithTimeout(context.Background(), time.Duration(int(ms))*time.Millisecond)
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defer cancel()
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} else {
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ctx = context.Background()
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}
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err := wakuState.node.DialPeer(ctx, address)
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return MakeJSONResponse(err)
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}
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func ConnectPeerID(peerID string, ms int) string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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var ctx context.Context
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var cancel context.CancelFunc
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pID, err := peer.Decode(peerID)
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if err != nil {
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return MakeJSONResponse(err)
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}
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if ms > 0 {
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ctx, cancel = context.WithTimeout(context.Background(), time.Duration(int(ms))*time.Millisecond)
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defer cancel()
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} else {
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ctx = context.Background()
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}
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err = wakuState.node.DialPeerByID(ctx, pID)
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return MakeJSONResponse(err)
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}
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func Disconnect(peerID string) string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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pID, err := peer.Decode(peerID)
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if err != nil {
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return MakeJSONResponse(err)
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}
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err = wakuState.node.ClosePeerById(pID)
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return MakeJSONResponse(err)
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}
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func PeerCnt() string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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return PrepareJSONResponse(wakuState.node.PeerCount(), nil)
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}
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func ContentTopic(applicationName string, applicationVersion int, contentTopicName string, encoding string) string {
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return protocol.NewContentTopic(applicationName, uint(applicationVersion), contentTopicName, encoding).String()
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}
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func PubsubTopic(name string, encoding string) string {
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return protocol.NewNamedShardingPubsubTopic(name + "/" + encoding).String()
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}
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func DefaultPubsubTopic() string {
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return protocol.DefaultPubsubTopic().String()
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}
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func getTopic(topic string) string {
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if topic == "" {
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return protocol.DefaultPubsubTopic().String()
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}
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return topic
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}
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type subscriptionMsg struct {
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MessageID string `json:"messageId"`
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PubsubTopic string `json:"pubsubTopic"`
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Message *pb.WakuMessage `json:"wakuMessage"`
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}
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func toSubscriptionMessage(msg *protocol.Envelope) *subscriptionMsg {
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return &subscriptionMsg{
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MessageID: hexutil.Encode(msg.Hash()),
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PubsubTopic: msg.PubsubTopic(),
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Message: msg.Message(),
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}
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}
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func Peers() string {
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if wakuState.node == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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peers, err := wakuState.node.Peers()
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return PrepareJSONResponse(peers, err)
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}
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func unmarshalPubkey(pub []byte) (ecdsa.PublicKey, error) {
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x, y := elliptic.Unmarshal(secp256k1.S256(), pub)
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if x == nil {
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return ecdsa.PublicKey{}, errors.New("invalid public key")
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}
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return ecdsa.PublicKey{Curve: secp256k1.S256(), X: x, Y: y}, nil
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}
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func extractPubKeyAndSignature(payload *payload.DecodedPayload) (pubkey string, signature string) {
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pkBytes := crypto.FromECDSAPub(payload.PubKey)
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if len(pkBytes) != 0 {
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pubkey = hexutil.Encode(pkBytes)
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}
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if len(payload.Signature) != 0 {
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signature = hexutil.Encode(payload.Signature)
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}
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return
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}
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func DecodeSymmetric(messageJSON string, symmetricKey string) string {
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var msg pb.WakuMessage
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err := json.Unmarshal([]byte(messageJSON), &msg)
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if err != nil {
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return MakeJSONResponse(err)
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}
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if msg.Version == 0 {
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return PrepareJSONResponse(msg.Payload, nil)
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} else if msg.Version > 1 {
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return MakeJSONResponse(errors.New("unsupported wakumessage version"))
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}
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keyInfo := &payload.KeyInfo{
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Kind: payload.Symmetric,
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}
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keyInfo.SymKey, err = utils.DecodeHexString(symmetricKey)
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if err != nil {
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return MakeJSONResponse(err)
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}
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payload, err := payload.DecodePayload(&msg, keyInfo)
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if err != nil {
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return MakeJSONResponse(err)
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}
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pubkey, signature := extractPubKeyAndSignature(payload)
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response := struct {
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PubKey string `json:"pubkey,omitempty"`
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Signature string `json:"signature,omitempty"`
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Data []byte `json:"data"`
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Padding []byte `json:"padding"`
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}{
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PubKey: pubkey,
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Signature: signature,
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Data: payload.Data,
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Padding: payload.Padding,
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}
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return PrepareJSONResponse(response, err)
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}
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func DecodeAsymmetric(messageJSON string, privateKey string) string {
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var msg pb.WakuMessage
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err := json.Unmarshal([]byte(messageJSON), &msg)
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if err != nil {
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return MakeJSONResponse(err)
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}
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if msg.Version == 0 {
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return PrepareJSONResponse(msg.Payload, nil)
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} else if msg.Version > 1 {
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return MakeJSONResponse(errors.New("unsupported wakumessage version"))
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}
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keyInfo := &payload.KeyInfo{
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Kind: payload.Asymmetric,
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}
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keyBytes, err := utils.DecodeHexString(privateKey)
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if err != nil {
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return MakeJSONResponse(err)
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}
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keyInfo.PrivKey, err = crypto.ToECDSA(keyBytes)
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if err != nil {
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return MakeJSONResponse(err)
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}
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payload, err := payload.DecodePayload(&msg, keyInfo)
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if err != nil {
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return MakeJSONResponse(err)
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}
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pubkey, signature := extractPubKeyAndSignature(payload)
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response := struct {
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PubKey string `json:"pubkey,omitempty"`
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Signature string `json:"signature,omitempty"`
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Data []byte `json:"data"`
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Padding []byte `json:"padding"`
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}{
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PubKey: pubkey,
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Signature: signature,
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Data: payload.Data,
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Padding: payload.Padding,
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}
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return PrepareJSONResponse(response, err)
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}
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