Go-Ethereum – How to Create and Sign EIP1559 Transaction with Go

eip-1559go-ethereumraw-transactiontransactions

i am kinda new to golang and i would appreciate any help.

My main purpose is offline signing EIP1559 transactions based on a json using go-ethereum. I have managed to sign legacy transactions following docs and got success on eth transfers but my erc20 transactions were reverted.
I have used types.NewTransaction() method and saw that it was deprecated.

I have been digging around the web to find some examples of the new EIP1559 transaction creation using types.NewTx() but i have been unsuccessful.

Best Answer

I have managed to create and sign transactions:

tx := types.NewTx(&types.DynamicFeeTx{
    ChainID: chainID,
    Nonce: nonce,
    GasFeeCap: feeCap,
    GasTipCap: tip,
    Gas: gas,
    To: &toAddress,
    Value: value,
    Data: txData,
})

Related Solutions

Ethereum Transactions – Creating and Signing Offline Raw Transactions

ethereumjs-tx is a library with this example:

npm install ethereumjs-tx

const Tx = require('ethereumjs-tx').Transaction
var privateKey = new Buffer('e331b6d69882b4cb4ea581d88e0b604039a3de5967688d3dcffdd2270c0fd109', 'hex')

var rawTx = {
  nonce: '0x00',
  gasPrice: '0x09184e72a000', 
  gasLimit: '0x2710',
  to: '0x0000000000000000000000000000000000000000', 
  value: '0x00', 
  data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057'
}

var tx = new Tx(rawTx)
tx.sign(privateKey)

var serializedTx = tx.serialize()
console.log(serializedTx.toString('hex'))

Go Ethereum – How to Create and Sign a Transaction Locally Using Go

Richard's answer pointed me in the right direction, but I had to remove some cruft to get it to do what I wanted. Here's some code that works (just replace the hardcoded values):

package main

import (
    "bytes"
    "fmt"
    "math/big"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core/types"
    "github.com/ethereum/go-ethereum/crypto"
)

func main() {

    chainId := big.NewInt(3) // ropsten

    senderPrivKey, _ := crypto.HexToECDSA("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
    recipientAddr := common.HexToAddress("0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")

    nonce := uint64(7)
    amount := big.NewInt(1000000000000000000) // 1 ether
    gasLimit := big.NewInt(100000)
    gasPrice := big.NewInt(20000000000) // 20 gwei

    tx := types.NewTransaction(nonce, recipientAddr, amount, gasLimit, gasPrice, nil)

    signer := types.NewEIP155Signer(chainId)
    signedTx, _ := types.SignTx(tx, signer, senderPrivKey)
    fmt.Println(signedTx)

    var buff bytes.Buffer
    signedTx.EncodeRLP(&buff)
    fmt.Printf("0x%x\n", buff.Bytes())
}

Best Answer

Related Solutions

Ethereum Transactions – Creating and Signing Offline Raw Transactions

Go Ethereum – How to Create and Sign a Transaction Locally Using Go

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