lbcd/rpcclient/examples/lbcdblocknotify/lbcdclient.go
Roy Lee f513fca6a7 lbcdblocknotify: reorganize the code with a few updates
1. Fixed a bug, which reads certs even TLS is disabled

2. Persists Stratum TCP connection with auto-reconnect.
   (retry backoff increases from 1s to 60s maximum)

3. Stratum update jobs on previous notifications are canceled
   when a new notification arrives.

   Usually, the jobs are so short and completed immediately.
   However, if the Stratum connection is broken, this prevents
   the bridge from accumulating stale jobs.
2022-10-17 00:03:13 -07:00

53 lines
1.2 KiB
Go

package main
import (
"io/ioutil"
"log"
"path/filepath"
"github.com/lbryio/lbcd/rpcclient"
)
func newLbcdClient(server, user, pass string, notls bool, adpt adapter) *rpcclient.Client {
ntfnHandlers := rpcclient.NotificationHandlers{
OnFilteredBlockConnected: adpt.onFilteredBlockConnected,
}
// Config lbcd RPC client with websockets.
connCfg := &rpcclient.ConnConfig{
Host: server,
Endpoint: "ws",
User: user,
Pass: pass,
DisableTLS: true,
}
if !notls {
cert, err := ioutil.ReadFile(filepath.Join(lbcdHomeDir, "rpc.cert"))
if err != nil {
log.Fatalf("can't read lbcd certificate: %s", err)
}
connCfg.Certificates = cert
connCfg.DisableTLS = false
}
client, err := rpcclient.New(connCfg, &ntfnHandlers)
if err != nil {
log.Fatalf("can't create rpc client: %s", err)
}
// Register for block connect and disconnect notifications.
if err = client.NotifyBlocks(); err != nil {
log.Fatalf("can't register block notification: %s", err)
}
// Get the current block count.
blockCount, err := client.GetBlockCount()
if err != nil {
log.Fatalf("can't get block count: %s", err)
}
log.Printf("Current block count: %d", blockCount)
return client
}