100 lines
2.1 KiB
Go
100 lines
2.1 KiB
Go
package qwhisper
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import (
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"fmt"
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"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/whisper"
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"gopkg.in/qml.v1"
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)
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func fromHex(s string) []byte {
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if len(s) > 1 {
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return ethutil.Hex2Bytes(s[2:])
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}
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return nil
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}
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func toHex(b []byte) string { return "0x" + ethutil.Bytes2Hex(b) }
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type Whisper struct {
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*whisper.Whisper
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view qml.Object
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watches map[int]*Watch
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}
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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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}
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func (self *Whisper) SetView(view qml.Object) {
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self.view = view
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}
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func (self *Whisper) Post(payload []string, to, from string, topics []string, priority, ttl uint32) {
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var data []byte
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for _, d := range payload {
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data = append(data, fromHex(d)...)
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}
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msg := whisper.NewMessage(data)
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envelope, err := msg.Seal(time.Duration(priority*100000), whisper.Opts{
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Ttl: time.Duration(ttl),
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To: crypto.ToECDSAPub(fromHex(to)),
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From: crypto.ToECDSA(fromHex(from)),
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Topics: whisper.TopicsFromString(topics...),
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})
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if err != nil {
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fmt.Println(err)
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// handle error
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return
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}
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if err := self.Whisper.Send(envelope); err != nil {
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fmt.Println(err)
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// handle error
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return
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}
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}
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func (self *Whisper) NewIdentity() string {
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return toHex(self.Whisper.NewIdentity().D.Bytes())
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}
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func (self *Whisper) HasIdentity(key string) bool {
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return self.Whisper.HasIdentity(crypto.ToECDSA(fromHex(key)))
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}
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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) {
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if view != nil {
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view.Call("onShhMessage", ToQMessage(msg), i)
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}
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}
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i = self.Whisper.Watch(filter)
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self.watches[i] = &Watch{}
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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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}
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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 {
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var topics []string
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topicList.Convert(&topics)
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f.Topics = whisper.TopicsFromString(topics...)
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}
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return
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}
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