Block Monitor

A Tezos node can notify applications when new blocks are attached to the chain. The Tezos RPC calls this monitor and technically it's a long-poll implementation. Here's how to use this feature in TzGo:

import "blockwatch.cc/tzgo/rpc"

// init SDK client
c, _ := rpc.NewClient("https://rpc.tzstats.com", nil)

// create block header monitor
mon := rpc.NewBlockHeaderMonitor()
defer mon.Close()

// all SDK functions take a context, here we just use a dummy
ctx := context.TODO()

// register the block monitor with our client
if err := c.MonitorBlockHeader(ctx, mon); err != nil {
	log.Fatalln(err)
}

// wait for new block headers
for {
	head, err := mon.Recv(ctx)
	if err != nil {
		log.Fatalln(err)
	}

	// do smth with the block header
	fmt.Printf("New block %s\n", head.Hash)
}