measure the uncompressed size of a transaction that registers a farcaster account

main.go

package main

import (
	"context"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/ethclient"
	"github.com/ethereum/go-ethereum/rlp"
	"log"
)

// This will measure the uncompressed size of a transaction that registers a farcaster account on OP mainnet
func main() {
	rpc_url := "https://mainnet.optimism.io"

	// this is a recent transaction to the farcaster bundler contract
	tx_hash := "0x19537dcc9d39f3e058903ce32543458d35ecd23f11d64e9b960574ce66657ec5"

	ctx := context.Background()
	c, err := ethclient.Dial(rpc_url)
	if err != nil {
		log.Fatal(err)
	}
	tx, _, err := c.TransactionByHash(ctx, common.HexToHash(tx_hash))
	if err != nil {
		log.Fatal(err)
	}
	data, err := rlp.EncodeToBytes(tx)
	if err != nil {
		log.Fatal(err)
	}

	// print result
	println(len(data))
}