mirror of https://github.com/status-im/go-waku.git
491 lines
11 KiB
Go
491 lines
11 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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"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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logging "github.com/ipfs/go-log/v2"
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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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"github.com/libp2p/go-libp2p/core/peer"
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"github.com/multiformats/go-multiaddr"
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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/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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var wakuNode *node.WakuNode
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var wakuStarted = false
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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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type wakuConfig struct {
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Host *string `json:"host,omitempty"`
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Port *int `json:"port,omitempty"`
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AdvertiseAddress *string `json:"advertiseAddr,omitempty"`
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NodeKey *string `json:"nodeKey,omitempty"`
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LogLevel *string `json:"logLevel,omitempty"`
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KeepAliveInterval *int `json:"keepAliveInterval,omitempty"`
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EnableRelay *bool `json:"relay"`
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EnableFilter *bool `json:"filter"`
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MinPeersToPublish *int `json:"minPeersToPublish"`
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EnableDiscV5 *bool `json:"discV5"`
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DiscV5BootstrapNodes []string `json:"discV5BootstrapNodes"`
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DiscV5UDPPort *uint `json:"discV5UDPPort"`
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}
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var defaultHost = "0.0.0.0"
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var defaultPort = 60000
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var defaultKeepAliveInterval = 20
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var defaultEnableRelay = true
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var defaultMinPeersToPublish = 0
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var defaultEnableFilter = false
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var defaultEnableDiscV5 = false
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var defaultDiscV5UDPPort = uint(9000)
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var defaultLogLevel = "INFO"
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func getConfig(configJSON string) (wakuConfig, error) {
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var config wakuConfig
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if configJSON != "" {
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err := json.Unmarshal([]byte(configJSON), &config)
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if err != nil {
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return wakuConfig{}, err
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}
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}
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if config.Host == nil {
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config.Host = &defaultHost
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}
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if config.EnableRelay == nil {
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config.EnableRelay = &defaultEnableRelay
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}
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if config.EnableFilter == nil {
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config.EnableFilter = &defaultEnableFilter
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}
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if config.EnableDiscV5 == nil {
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config.EnableDiscV5 = &defaultEnableDiscV5
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}
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if config.Host == nil {
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config.Host = &defaultHost
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}
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if config.Port == nil {
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config.Port = &defaultPort
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}
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if config.DiscV5UDPPort == nil {
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config.DiscV5UDPPort = &defaultDiscV5UDPPort
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}
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if config.KeepAliveInterval == nil {
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config.KeepAliveInterval = &defaultKeepAliveInterval
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}
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if config.MinPeersToPublish == nil {
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config.MinPeersToPublish = &defaultMinPeersToPublish
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}
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if config.LogLevel == nil {
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config.LogLevel = &defaultLogLevel
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}
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return config, nil
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}
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func NewNode(configJSON string) string {
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if wakuNode != 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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opts = append(opts, node.WithWakuRelayAndMinPeers(*config.MinPeersToPublish))
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}
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if *config.EnableFilter {
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opts = append(opts, node.WithWakuFilter(false))
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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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// for go-libp2p loggers
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lvl, err := logging.LevelFromString(*config.LogLevel)
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if err != nil {
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return MakeJSONResponse(err)
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}
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logging.SetAllLoggers(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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wakuNode = w
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return MakeJSONResponse(nil)
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}
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func Start() string {
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if wakuNode == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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ctx := context.Background()
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if err := wakuNode.Start(ctx); err != nil {
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return MakeJSONResponse(err)
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}
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if wakuNode.DiscV5() != nil {
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if err := wakuNode.DiscV5().Start(context.Background()); err != nil {
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wakuNode.Stop()
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return MakeJSONResponse(err)
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}
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}
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wakuStarted = true
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return MakeJSONResponse(nil)
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}
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func Stop() string {
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if wakuNode == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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wakuNode.Stop()
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wakuStarted = false
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wakuNode = 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(wakuStarted, nil)
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}
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func PeerID() string {
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if wakuNode == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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return PrepareJSONResponse(wakuNode.ID(), nil)
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}
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func ListenAddresses() string {
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if wakuNode == 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 wakuNode.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 wakuNode == 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 := wakuNode.AddPeer(ma, 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 wakuNode == 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 := wakuNode.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 wakuNode == 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 = wakuNode.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 wakuNode == 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 = wakuNode.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 wakuNode == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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return PrepareJSONResponse(wakuNode.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.NewPubsubTopic(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 wakuNode == nil {
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return MakeJSONResponse(errWakuNodeNotReady)
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}
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peers, err := wakuNode.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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