package qwhisper import ( "time" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/whisper" "gopkg.in/qml.v1" ) var qlogger = logger.NewLogger("QSHH") func fromHex(s string) []byte { if len(s) > 1 { return ethutil.Hex2Bytes(s[2:]) } return nil } func toHex(b []byte) string { return "0x" + ethutil.Bytes2Hex(b) } type Whisper struct { *whisper.Whisper view qml.Object watches map[int]*Watch } func New(w *whisper.Whisper) *Whisper { return &Whisper{w, nil, make(map[int]*Watch)} } func (self *Whisper) SetView(view qml.Object) { self.view = view } func (self *Whisper) Post(payload []string, to, from string, topics []string, priority, ttl uint32) { var data []byte for _, d := range payload { data = append(data, fromHex(d)...) } pk := crypto.ToECDSAPub(fromHex(from)) if key := self.Whisper.GetIdentity(pk); key != nil { msg := whisper.NewMessage(data) envelope, err := msg.Seal(time.Duration(priority*100000), whisper.Opts{ Ttl: time.Duration(ttl) * time.Second, To: crypto.ToECDSAPub(fromHex(to)), From: key, Topics: whisper.TopicsFromString(topics...), }) if err != nil { qlogger.Infoln(err) // handle error return } if err := self.Whisper.Send(envelope); err != nil { qlogger.Infoln(err) // handle error return } } else { qlogger.Infoln("unmatched pub / priv for seal") } } func (self *Whisper) NewIdentity() string { key := self.Whisper.NewIdentity() return toHex(crypto.FromECDSAPub(&key.PublicKey)) } func (self *Whisper) HasIdentity(key string) bool { return self.Whisper.HasIdentity(crypto.ToECDSAPub(fromHex(key))) } func (self *Whisper) Watch(opts map[string]interface{}, view *qml.Common) int { filter := filterFromMap(opts) var i int filter.Fn = func(msg *whisper.Message) { if view != nil { view.Call("onShhMessage", ToQMessage(msg), i) } } i = self.Whisper.Watch(filter) self.watches[i] = &Watch{} return i } func (self *Whisper) Messages(id int) (messages *ethutil.List) { msgs := self.Whisper.Messages(id) messages = ethutil.EmptyList() for _, message := range msgs { messages.Append(ToQMessage(message)) } return } func filterFromMap(opts map[string]interface{}) (f whisper.Filter) { if to, ok := opts["to"].(string); ok { f.To = crypto.ToECDSA(fromHex(to)) } if from, ok := opts["from"].(string); ok { f.From = crypto.ToECDSAPub(fromHex(from)) } if topicList, ok := opts["topics"].(*qml.List); ok { var topics []string topicList.Convert(&topics) f.Topics = whisper.TopicsFromString(topics...) } return }