Lite wallet server
https://hush.is
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
1.7 KiB
82 lines
1.7 KiB
package main
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import (
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"encoding/binary"
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"log"
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"github.com/gtank/ctxd/parser"
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zmq "github.com/pebbe/zmq4"
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"github.com/pkg/errors"
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)
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const (
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PORT = 28332
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)
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func main() {
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ctx, err := zmq.NewContext()
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if err != nil {
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log.Fatal(err)
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}
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defer ctx.Term()
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// WARNING: The Socket is not thread safe. This means that you cannot
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// access the same Socket from different goroutines without using something
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// like a mutex.
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sock, err := ctx.NewSocket(zmq.SUB)
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if err != nil {
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log.Fatal(errors.Wrap(err, "creating socket"))
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}
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err = sock.SetSubscribe("rawblock")
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if err != nil {
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log.Fatal(errors.Wrap(err, "subscribing"))
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}
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err = sock.Connect("tcp://127.0.0.1:28332")
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if err != nil {
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log.Fatal(errors.Wrap(err, "connecting"))
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}
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defer sock.Close()
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for {
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msg, err := sock.RecvMessageBytes(0)
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if err != nil {
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log.Println(errors.Wrap(err, "on message receipt"))
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continue
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}
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if len(msg) < 3 {
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log.Printf("got unknown msg: %v", msg)
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continue
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}
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topic, body := msg[0], msg[1]
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var sequence int
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if len(msg[2]) == 4 {
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sequence = int(binary.LittleEndian.Uint32(msg[len(msg)-1]))
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}
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switch string(topic) {
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case "rawblock":
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log.Printf("got block (%d): %x\n", sequence, body[:80])
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go handleBlock(sequence, body)
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default:
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log.Printf("unexpected topic: %s (%d)", topic, sequence)
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}
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}
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}
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func handleBlock(sequence int, blockData []byte) {
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block := parser.NewBlock()
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rest, err := block.ParseFromSlice(blockData)
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if err != nil {
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log.Println("Error parsing block (%d): %v", err)
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return
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}
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if len(rest) != 0 {
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log.Println("Received overlong message:\n%x", rest)
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return
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}
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log.Printf("Received a version %d block with %d transactions.", block.GetVersion(), block.GetTxCount())
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}
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