Is it possible to get bytecode from the evm in golang?

Question

Imagine this scenario, I have a contract that has a function where I call with runtime.Call().

But this function returns an address of a newly created contract, but not the bytecode as runtime.Create does.

How would I access that bytecode?

Thanks!!

Answer 1

Yes it is! Use the client CodeAt method of the ethclient package to read the bytecode of a deployed smart contract. Here's a full example:

package main

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

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/ethclient"
)

func main() {
    client, err := ethclient.Dial("https://rinkeby.infura.io")
    if err != nil {
        log.Fatal(err)
    }

    contractAddress := common.HexToAddress("0x147B8eb97fD247D06C4006D269c90C1908Fb5D54")
    bytecode, err := client.CodeAt(context.Background(), contractAddress, nil) // nil is latest block
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println(hex.EncodeToString(bytecode)) // 60806...10029
}

It'll be the same result as seen on etherscan