bitcoinjs-lib
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Package description
The bitcoinjs-lib npm package is a library for Bitcoin-related operations in JavaScript. It provides tools for creating, signing, and verifying Bitcoin transactions, as well as generating and managing Bitcoin addresses and keys.
Generate a Bitcoin Address
This feature allows you to generate a new Bitcoin address. The code creates a random key pair and derives a Bitcoin address from the public key.
const bitcoin = require('bitcoinjs-lib');
const keyPair = bitcoin.ECPair.makeRandom();
const { address } = bitcoin.payments.p2pkh({ pubkey: keyPair.publicKey });
console.log(address);Create a Bitcoin Transaction
This feature allows you to create a Bitcoin transaction. The code builds a transaction by adding inputs and outputs, and then signs it with the private key.
const bitcoin = require('bitcoinjs-lib');
const keyPair = bitcoin.ECPair.fromWIF('your-private-key');
const txb = new bitcoin.TransactionBuilder();
txb.addInput('previous-txid', 0); // Add input (previous transaction)
txb.addOutput('recipient-address', 100000); // Add output (recipient address and amount in satoshis)
txb.sign(0, keyPair); // Sign the transaction
const tx = txb.build().toHex();
console.log(tx);Verify a Bitcoin Transaction
This feature allows you to verify a Bitcoin transaction. The code parses a transaction from its hexadecimal representation and checks if all inputs have valid scripts.
const bitcoin = require('bitcoinjs-lib');
const tx = bitcoin.Transaction.fromHex('transaction-hex');
const txb = bitcoin.TransactionBuilder.fromTransaction(tx);
const isValid = txb.inputs.every(input => input.script && input.script.length > 0);
console.log(isValid);Bitcore-lib is another JavaScript library for Bitcoin-related operations. It offers similar functionalities to bitcoinjs-lib, such as creating and signing transactions, generating addresses, and managing keys. Bitcore-lib is part of the Bitcore project, which includes additional tools and services for Bitcoin development.
Bcoin is a full Bitcoin node implementation in JavaScript. It provides a comprehensive set of tools for Bitcoin development, including wallet management, transaction creation, and blockchain interaction. Bcoin is more feature-rich compared to bitcoinjs-lib, as it can run as a full node and participate in the Bitcoin network.
Bitcoin-core is a JavaScript library for interacting with Bitcoin Core, the reference implementation of the Bitcoin protocol. It allows developers to communicate with a Bitcoin Core node using RPC calls, enabling functionalities such as transaction creation, address management, and blockchain querying. Unlike bitcoinjs-lib, which is a standalone library, bitcoin-core relies on a running Bitcoin Core node.
Changelog
4.0.2
fixed
TransactionBuilder not throwing when payment type validation should fail (#1195)removed
package.json from src/payments (#1216)Readme
A javascript Bitcoin library for node.js and browsers.
Released under the terms of the MIT LICENSE.
If you are thinking of using the master branch of this library in production, stop. Master is not stable; it is our development branch, and only tagged releases may be classified as stable.
Don't trust. Verify.
We recommend every user of this library and the bitcoinjs ecosystem audit and verify any underlying code for its validity and suitability.
Mistakes and bugs happen, but with your help in resolving and reporting issues, together we can produce open source software that is:
Buffer's throughout, andPresently, we do not have any formal documentation other than our examples, please ask for help if our examples aren't enough to guide you.
npm install bitcoinjs-lib
Typically we support the Node Maintenance LTS version. If in doubt, see the .travis.yml for what versions are used by our continuous integration tests.
WARNING: We presently don't provide any tooling to verify that the release on npm matches GitHub. As such, you should verify anything downloaded by npm against your own verified copy.
The recommended method of using bitcoinjs-lib in your browser is through Browserify.
If you're familiar with how to use browserify, ignore this and carry on, otherwise, it is recommended to read the tutorial at http://browserify.org/.
NOTE: We use Node Maintenance LTS features, if you need strict ES5, use --transform babelify in conjunction with your browserify step (using an es2015 preset).
NOTE: If you expect this library to run on an iOS 10 device, ensure that you are using buffer@5.0.5 or greater.
Type declarations for Typescript are available for version ^3.0.0 of the library.
npm install @types/bitcoinjs-lib
For VSCode (and other editors), it is advised to install the type declarations, as Intellisense uses that information to help you code (autocompletion, static analysis).
WARNING: These Typescript definitions are not maintained by the maintainers of this repository, and are instead maintained at DefinitelyTyped. Please report any issues or problems there.
Flow-type definitions for are available in the flow-typed repository for version ^2.0.0 of the library.
You can download them directly, or using the flow-typed CLI:
npm install -g flow-typed
flow-typed install -f 0.27 bitcoinjs-lib@2.2.0
These definitions are maintained by @runn1ng.
The below examples are implemented as integration tests, they should be very easy to understand. Otherwise, pull requests are appreciated. Some examples interact (via HTTPS) with a 3rd Party Blockchain Provider (3PBP).
If you have a use case that you feel could be listed here, please ask for it!
See CONTRIBUTING.md.
npm test
npm run-script coverage
FAQs
Client-side Bitcoin JavaScript library
The npm package bitcoinjs-lib receives a total of 105,131 weekly downloads. As such, bitcoinjs-lib popularity was classified as popular.
We found that bitcoinjs-lib demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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