forked from cerc-io/plugeth
117 lines
2.5 KiB
Go
117 lines
2.5 KiB
Go
package xeth
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import (
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"errors"
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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/logger"
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"github.com/ethereum/go-ethereum/whisper"
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)
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var qlogger = logger.NewLogger("XSHH")
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type Whisper struct {
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*whisper.Whisper
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}
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func NewWhisper(w *whisper.Whisper) *Whisper {
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return &Whisper{w}
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}
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func (self *Whisper) Post(payload string, to, from string, topics []string, priority, ttl uint32) error {
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if priority == 0 {
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priority = 1000
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}
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if ttl == 0 {
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ttl = 100
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}
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pk := crypto.ToECDSAPub(fromHex(from))
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if key := self.Whisper.GetIdentity(pk); key != nil || len(from) == 0 {
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msg := whisper.NewMessage(fromHex(payload))
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envelope, err := msg.Seal(time.Duration(priority*100000), whisper.Opts{
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Ttl: time.Duration(ttl) * time.Second,
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To: crypto.ToECDSAPub(fromHex(to)),
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From: key,
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Topics: whisper.TopicsFromString(topics...),
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})
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if err != nil {
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return err
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}
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if err := self.Whisper.Send(envelope); err != nil {
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return err
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}
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} else {
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return errors.New("unmatched pub / priv for seal")
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}
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return nil
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}
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func (self *Whisper) NewIdentity() string {
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key := self.Whisper.NewIdentity()
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return toHex(crypto.FromECDSAPub(&key.PublicKey))
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}
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func (self *Whisper) HasIdentity(key string) bool {
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return self.Whisper.HasIdentity(crypto.ToECDSAPub(fromHex(key)))
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}
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func (self *Whisper) Watch(opts *Options) int {
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filter := whisper.Filter{
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To: crypto.ToECDSA(fromHex(opts.To)),
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From: crypto.ToECDSAPub(fromHex(opts.From)),
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Topics: whisper.TopicsFromString(opts.Topics...),
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}
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var i int
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filter.Fn = func(msg *whisper.Message) {
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opts.Fn(NewWhisperMessage(msg))
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}
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fmt.Println("new filter", filter)
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i = self.Whisper.Watch(filter)
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return i
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}
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func (self *Whisper) Messages(id int) (messages []WhisperMessage) {
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msgs := self.Whisper.Messages(id)
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messages = make([]WhisperMessage, len(msgs))
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for i, message := range msgs {
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messages[i] = NewWhisperMessage(message)
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}
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return
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}
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type Options struct {
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To string
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From string
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Topics []string
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Fn func(msg WhisperMessage)
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}
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type WhisperMessage struct {
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ref *whisper.Message
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Flags int32 `json:"flags"`
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Payload string `json:"payload"`
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From string `json:"from"`
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}
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func NewWhisperMessage(msg *whisper.Message) WhisperMessage {
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return WhisperMessage{
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ref: msg,
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Flags: int32(msg.Flags),
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Payload: "0x" + ethutil.Bytes2Hex(msg.Payload),
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From: "0x" + ethutil.Bytes2Hex(crypto.FromECDSAPub(msg.Recover())),
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}
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}
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