package main

import (
	"context"
	"encoding/json"
	"io/ioutil"
	"log"
	"math/big"
	"time"

	"git.grassecon.net/chaintool/gorge/pkg/block"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/lmittmann/w3"
)

func main() {
	client := w3.MustDial("https://rpc.ankr.com/eth")
	defer client.Close()

	defer traceExecTime(time.Now())
	blockFetcher := block.NewBlockFetcher(block.BlockFetcherOpts{
		W3Client: client,
		Signer:   types.NewEIP155Signer(big.NewInt(1)),
	})

	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
	defer cancel()

	// https://etherscan.io/block/16031266
	res, err := blockFetcher.FetchBlock(ctx, big.NewInt(5000000))
	if err != nil {
		log.Fatalf("Could not fetch block: %v", err)
	}

	resJson, err := json.Marshal(res)
	if err != nil {
		log.Fatalf("json.Marshal failed: %v", err)
	}

	if err := ioutil.WriteFile("block.json", resJson, 0644); err != nil {
		log.Fatalf("Write file failed: %v", err)
	}

	log.Printf("Block successfully obtained")
}