plugeth/ui/qt/qwhisper/whisper.go

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package qwhisper
import (
"time"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/whisper"
"gopkg.in/qml.v1"
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)
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var qlogger = logger.NewLogger("QSHH")
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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
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watches map[int]*Watch
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}
func New(w *whisper.Whisper) *Whisper {
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return &Whisper{w, nil, make(map[int]*Watch)}
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}
func (self *Whisper) SetView(view qml.Object) {
self.view = view
}
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func (self *Whisper) Post(payload []string, to, from string, topics []string, priority, ttl uint32) {
var data []byte
for _, d := range payload {
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data = append(data, fromHex(d)...)
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}
msg := whisper.NewMessage(data)
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envelope, err := msg.Seal(time.Duration(priority*100000), whisper.Opts{
Ttl: time.Duration(ttl),
To: crypto.ToECDSAPub(fromHex(to)),
From: crypto.ToECDSA(fromHex(from)),
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Topics: whisper.TopicsFromString(topics...),
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})
if err != nil {
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qlogger.Infoln(err)
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// handle error
return
}
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if err := self.Whisper.Send(envelope); err != nil {
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qlogger.Infoln(err)
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// handle error
return
}
}
func (self *Whisper) NewIdentity() string {
return toHex(self.Whisper.NewIdentity().D.Bytes())
}
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func (self *Whisper) HasIdentity(key string) bool {
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return self.Whisper.HasIdentity(crypto.ToECDSA(fromHex(key)))
}
func (self *Whisper) Watch(opts map[string]interface{}, view *qml.Common) int {
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filter := filterFromMap(opts)
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var i int
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filter.Fn = func(msg *whisper.Message) {
if view != nil {
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view.Call("onShhMessage", ToQMessage(msg), i)
}
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}
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i = self.Whisper.Watch(filter)
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self.watches[i] = &Watch{}
return i
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}
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func filterFromMap(opts map[string]interface{}) (f whisper.Filter) {
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if to, ok := opts["to"].(string); ok {
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f.To = crypto.ToECDSA(fromHex(to))
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}
if from, ok := opts["from"].(string); ok {
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f.From = crypto.ToECDSAPub(fromHex(from))
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}
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if topicList, ok := opts["topics"].(*qml.List); ok {
var topics []string
topicList.Convert(&topics)
f.Topics = whisper.TopicsFromString(topics...)
}
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return
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}