bip174

What is bip174?

The bip174 npm package is a library for handling Partially Signed Bitcoin Transactions (PSBT) as defined by BIP 174. It provides tools to create, modify, and finalize PSBTs, which are useful for multi-party transaction signing and other advanced Bitcoin transaction workflows.

What are bip174's main functionalities?

Create a PSBT

This feature allows you to create a new PSBT by adding inputs and outputs. The code sample demonstrates how to initialize a PSBT, add an input with a transaction hash and index, and add an output with a recipient address and value.

const { Psbt } = require('bip174');
const psbt = new Psbt();
psbt.addInput({
  hash: 'transactionHash',
  index: 0,
  nonWitnessUtxo: Buffer.from('hexString', 'hex')
});
psbt.addOutput({
  address: 'recipientAddress',
  value: 1000
});
console.log(psbt.toBase64());

Sign a PSBT

This feature allows you to sign a PSBT. The code sample demonstrates how to load a PSBT from a base64 string, create a key pair, and sign the first input of the PSBT.

const { Psbt } = require('bip174');
const psbt = Psbt.fromBase64('base64PsbtString');
const keyPair = { publicKey: Buffer.from('publicKeyHex', 'hex'), privateKey: Buffer.from('privateKeyHex', 'hex') };
psbt.signInput(0, keyPair);
console.log(psbt.toBase64());

Finalize a PSBT

This feature allows you to finalize a PSBT and extract the final transaction. The code sample demonstrates how to load a PSBT from a base64 string, finalize all inputs, and extract the final transaction in hexadecimal format.

const { Psbt } = require('bip174');
const psbt = Psbt.fromBase64('base64PsbtString');
psbt.finalizeAllInputs();
const tx = psbt.extractTransaction();
console.log(tx.toHex());

Other packages similar to bip174

bitcoinjs-lib

The bitcoinjs-lib package is a comprehensive library for Bitcoin-related operations, including transaction creation, signing, and verification. It provides more general functionality compared to bip174, which is specifically focused on PSBT handling.

bcoin

The bcoin package is a full Bitcoin node implementation written in JavaScript. It includes extensive functionality for transaction creation, signing, and network communication. While it supports PSBT, it is a more heavyweight solution compared to the focused bip174 package.

bitcore-lib

The bitcore-lib package is a library for Bitcoin and blockchain-related operations. It provides tools for creating and signing transactions, as well as interacting with the Bitcoin network. It offers broader functionality than bip174, which is specialized for PSBT.

README

bip174

WIP

Example

let bip174 = require('bip174')

// ...

LICENSE ISC