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- // Copyright (c) 2016 The btcsuite developers
- // Copyright (c) 2015-2016 The Decred developers
- // Use of this source code is governed by an ISC
- // license that can be found in the LICENSE file.
- package main
- import (
- "io/ioutil"
- "log"
- "os/exec"
- "path/filepath"
- "time"
- "github.com/decred/dcrd/chaincfg/chainhash"
- "github.com/decred/dcrrpcclient"
- "github.com/decred/dcrutil"
- )
- const (
- processName = "blocknotify"
- )
- func main() {
- // Only override the handlers for notifications you care about.
- // Also note most of these handlers will only be called if you register
- // for notifications. See the documentation of the dcrrpcclient
- // NotificationHandlers type for more details about each handler.
- ntfnHandlers := dcrrpcclient.NotificationHandlers{
- OnBlockConnected: func(hash *chainhash.Hash, height int32, time time.Time, vb uint16) {
- // Find the process path.
- cmd := exec.Command(processName, "1574", hash.String())
- if err := cmd.Run(); err != nil {
- log.Fatalln(err)
- }
- log.Printf("Block connected: %v (%d)", hash, height)
- },
- }
- // Connect to local dcrd RPC server using websockets.
- dcrdHomeDir := dcrutil.AppDataDir("dcrd", false)
- certs, err := ioutil.ReadFile(filepath.Join(dcrdHomeDir, "rpc.cert"))
- if err != nil {
- log.Fatal(err)
- }
- connCfg := &dcrrpcclient.ConnConfig{
- Host: "localhost:9109",
- Endpoint: "ws",
- User: "test",
- Pass: "tabc",
- Certificates: certs,
- }
- client, err := dcrrpcclient.New(connCfg, &ntfnHandlers)
- if err != nil {
- log.Fatalln(err)
- }
- // Register for block connect and disconnect notifications.
- if err := client.NotifyBlocks(); err != nil {
- log.Fatalln(err)
- }
- log.Println("NotifyBlocks: Registration Complete")
- // Wait until the client either shuts down gracefully (or the user
- // terminates the process with Ctrl+C).
- client.WaitForShutdown()
- }
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