Ethereum: How to sign a SegWit transaction using NBitcoin?

Signing Ethereum Transactions Using SegWit with NBitcoin

Currently, most online resources only provide examples of signing transactions using the Legacy Ethereum protocol. However, we are excited to share a new approach using NBitcoin, a lightweight implementation of Bitcoin that supports SegWit (also known as Lightning Network).

In this article, we will walk you through the process of signing an Ethereum transaction using SegWit with NBitcoin.

What is SegWit?

Before we get into the details, let’s briefly explain what SegWit is. SegWit is a new standard for Bitcoin that enables more efficient and scalable transactions without the need for a Full-Node to verify them. It uses a new consensus algorithm called Lightning Network (LN) to facilitate peer-to-peer transactions.

NBitcoin: A lightweight Bitcoin implementation

NBitcoin is an open-source, decentralized implementation of Bitcoin, designed for small users and developers who want to use Bitcoin without the hassle of installing a full Node or managing a complex network. It supports a variety of programming languages ​​and has a relatively low barrier to entry.

Signing SegWit transactions with NBitcoin

To sign a transaction using SegWit with NBitcoin, follow these steps:

  • Install the NBitcoin library

    Ethereum: How to sign a SegWit transaction via NBitcoin?

    : First, you need to install the NBitcoin library on your computer. You can do this by running npm install nbitcoin (if you are using Node.js) or pip install nbitcoin.

  • Create a new transaction

    : Use the NBitcoin SDK to create a new transaction. Here is an example:

const nbt = require( 'nbitcoin');

// Create a new wallet

let myWallet = nbt.newWallet();

// Create a new transaction from another wallet

myWallet.from('1234567890abcdef')

.addAddress('1A1B2C3D4E5F6G7H8I9J10K11L12M13N14O15P16Q17R18S19T20U21V22W23X24Y25Z26') .

.setFee(0.00001) .

.addInput({

'from': {

'address': '1234567890abcdef',

'amount': 10,

'scriptsignature': {

'publickey': '1A1B2C3D4E5F6G7H8I9J10K11L12M13N14O15P16Q17R18S19T20U21V22W23X24Y25Z26',

'sequence': 0

} }

},

'keep': {

'address': '1A2B3C4D5E6F7G8H9I10J11K12L13M14N15O16P17Q18R19S20T21U22V23W24X25Y26Z2

} }

})

.sign('0x1234567890abcdef');

In this example, we create a new wallet using nbt.newWallet() and then add another wallet to transfer funds from. We set the fee to 1% of the transaction amount (in this case, 10 units) and specify the Sig script and inputs for the transaction.

  • Sign the transaction: Use the sign method to sign the transaction:

myWallet . sign ( ' 0x1234567890abcdef ' ) ;

A new signature will be created that can be used to verify the transaction on an NBitcoin node (LN node).

Important Notes

  • Please note that signing SegWit transactions using NBitcoin requires a valid and active wallet.
  • For this example to work, the necessary dependencies must be installed.
  • This is just an example. For more detailed information, please see the official NBitcoin documentation and the SegWit specification.

You can successfully sign Ethereum transactions using SegWit with NBitcoin by following these steps. Happy coding!

Comments are closed.