Exemple #1
0
// Post injects a message into the whisper network for distribution.
func (self *Whisper) Post(payload string, to, from string, topics []string, priority, ttl uint32) error {
	// Decode the topic strings
	topicsDecoded := make([][]byte, len(topics))
	for i, topic := range topics {
		topicsDecoded[i] = common.FromHex(topic)
	}
	// Construct the whisper message and transmission options
	message := whisper.NewMessage(common.FromHex(payload))
	options := whisper.Options{
		To:     crypto.ToECDSAPub(common.FromHex(to)),
		TTL:    time.Duration(ttl) * time.Second,
		Topics: whisper.NewTopics(topicsDecoded...),
	}
	if len(from) != 0 {
		if key := self.Whisper.GetIdentity(crypto.ToECDSAPub(common.FromHex(from))); key != nil {
			options.From = key
		} else {
			return fmt.Errorf("unknown identity to send from: %s", from)
		}
	}
	// Wrap and send the message
	pow := time.Duration(priority) * time.Millisecond
	envelope, err := message.Wrap(pow, options)
	if err != nil {
		return err
	}
	if err := self.Whisper.Send(envelope); err != nil {
		return err
	}
	return nil
}
Exemple #2
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// Watch installs a new message handler to run in case a matching packet arrives
// from the whisper network.
func (self *Whisper) Watch(to, from string, topics [][]string, fn func(WhisperMessage)) int {
	// Decode the topic strings
	topicsDecoded := make([][][]byte, len(topics))
	for i, condition := range topics {
		topicsDecoded[i] = make([][]byte, len(condition))
		for j, topic := range condition {
			topicsDecoded[i][j] = common.FromHex(topic)
		}
	}
	// Assemble and inject the filter into the whisper client
	filter := whisper.Filter{
		To:     crypto.ToECDSAPub(common.FromHex(to)),
		From:   crypto.ToECDSAPub(common.FromHex(from)),
		Topics: whisper.NewFilterTopics(topicsDecoded...),
	}
	filter.Fn = func(message *whisper.Message) {
		fn(NewWhisperMessage(message))
	}
	return self.Whisper.Watch(filter)
}
Exemple #3
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// importPublicKey unmarshals 512 bit public keys.
func importPublicKey(pubKey []byte) (*ecies.PublicKey, error) {
	var pubKey65 []byte
	switch len(pubKey) {
	case 64:
		// add 'uncompressed key' flag
		pubKey65 = append([]byte{0x04}, pubKey...)
	case 65:
		pubKey65 = pubKey
	default:
		return nil, fmt.Errorf("invalid public key length %v (expect 64/65)", len(pubKey))
	}
	// TODO: fewer pointless conversions
	return ecies.ImportECDSAPublic(crypto.ToECDSAPub(pubKey65)), nil
}
Exemple #4
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// HasIdentity checks if the the whisper node is configured with the private key
// of the specified public pair.
func (self *Whisper) HasIdentity(key string) bool {
	return self.Whisper.HasIdentity(crypto.ToECDSAPub(common.FromHex(key)))
}