Listen new blocks - Tendermint - Cosmos sdk

main.go

package main

import (
	"context"
	"encoding/hex"
	"fmt"
	"log"
	"time"

	rpchttp "github.com/tendermint/tendermint/rpc/client/http"
	"github.com/tendermint/tendermint/types"
)

func main() {
	client, err := rpchttp.New("tcp://127.0.0.1:26657", "/websocket")
	if err != nil {
		log.Fatal(err)
	}

	err = client.Start()
	if err != nil {
		log.Fatal(err)
	}
	defer client.Stop()
	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
	defer cancel()
	query := "tm.event = 'NewBlock'"
	txs, err := client.Subscribe(ctx, "test-client", query)
	if err != nil {
		log.Fatal(err)
	}

	for e := range txs {
		switch data := e.Data.(type) {
		case types.EventDataNewBlock:
			fmt.Printf("Block %s - Height: %d \n", hex.EncodeToString(data.Block.Hash()), data.Block.Height)
			break
		}
	}
}

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