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