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// QWhisper package. This package is temporarily on hold until QML DApp dev will reemerge.
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"
"github.com/obscuren/qml"
)
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
}
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