185 lines
8.9 KiB
Markdown
185 lines
8.9 KiB
Markdown
# BitcoinJS (bitcoinjs-lib)
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[](https://travis-ci.org/bitcoinjs/bitcoinjs-lib)
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[](https://www.npmjs.org/package/bitcoinjs-lib)
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[](http://tip4commit.com/projects/735)
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[](https://github.com/feross/standard)
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The pure JavaScript Bitcoin library for node.js and browsers.
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Used by over a million wallet users and the backbone for almost all Bitcoin web wallets in production today.
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## Features
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- Clean: Pure JavaScript, concise code, easy to read.
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- Tested: Coverage > 90%, third-party integration tests.
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- Careful: Two person approval process for small, focused pull requests.
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- Compatible: Works on Node.js and all modern browsers.
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- Powerful: Support for advanced features, such as multi-sig, HD Wallets.
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- Secure: Strong random number generation, PGP signed releases, trusted developers.
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- Principled: No support for browsers with crap RNG (IE < 11)
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- Standardized: Node community coding style, Browserify, Node's stdlib and Buffers.
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- Fast: Optimized code, uses typed arrays instead of byte arrays for performance.
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- Experiment-friendly: Bitcoin Mainnet and Testnet support.
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- Altcoin-ready: Capable of working with bitcoin-derived cryptocurrencies (such as Dogecoin).
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## Should I use this in production?
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If you are thinking of using the master branch of this library in production, **stop**.
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Master is not stable; it is our development branch, and [only tagged releases may be classified as stable](https://github.com/bitcoinjs/bitcoinjs-lib/tags).
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## Installation
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`npm install bitcoinjs-lib`
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## Setup
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### Node.js
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var bitcoin = require('bitcoinjs-lib')
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### Browser
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If you're familiar with how to use browserify, ignore this and proceed normally.
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These steps are advisory only, and may not be necessary for your application.
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[Browserify](https://github.com/substack/node-browserify) is assumed to be installed for these steps.
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From your repository, create an `index.js` file
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``` javascript
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module.exports = {
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base58: require('bs58'),
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bitcoin: require('bitcoinjs-lib'),
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ecurve: require('ecurve'),
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BigInteger: require('bigi'),
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Buffer: require('buffer')
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}
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```
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Install each of the above packages locally
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``` bash
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npm install bs58 bitcoinjs-lib ecurve bigi buffer
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```
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After installation, use browserify to compile `index.js` for use in the browser:
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``` bash
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$ browserify index.js --standalone foo > app.js
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```
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You will now be able to use `<script src="app.js" />` in your browser, with each of the above exports accessible via the global `foo` object (or whatever you chose for the `--standalone` parameter above).
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**NOTE**: See our package.json for the currently supported version of browserify used by this repository.
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**NOTE**: When uglifying the javascript, you must exclude the following variable names from being mangled: `Array`, `BigInteger`, `Boolean`, `Buffer`, `ECPair`, `Function`, `Number`, `Point` and `Script`.
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This is because of the function-name-duck-typing used in [typeforce](https://github.com/dcousens/typeforce).
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Example:
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``` bash
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uglifyjs ... --mangle --reserved 'Array,BigInteger,Boolean,Buffer,ECPair,Function,Number,Point'
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```
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### Flow
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Definitions for [Flow typechecker](https://flowtype.org/) are available in flow-typed repository.
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[You can either download them directly](https://github.com/flowtype/flow-typed/blob/master/definitions/npm/bitcoinjs-lib_v2.x.x/flow_%3E%3Dv0.17.x/bitcoinjs-lib_v2.x.x.js) from the repo, or with the flow-typed CLI
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# npm install -g flow-typed
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$ flow-typed install -f 0.27 bitcoinjs-lib@2.2.0 # 0.27 for flow version, 2.2.0 for bitcoinjs-lib version
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The definitions are complete and up to date with version 2.2.0. The definitions are maintained by [@runn1ng](https://github.com/runn1ng).
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## Examples
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The below examples are implemented as integration tests, they should be very easy to understand. Otherwise, pull requests are appreciated.
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- [Generate a random address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/basic.js#L9)
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- [Generate a address from a SHA256 hash](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/basic.js#L20)
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- [Generate a address and WIF for Litecoin](https://github.com/bitcoin/bitcoinjs-lib/blob/master/test/integration/basic.js#L29)
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- [Import an address via WIF](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/basic.js#L43)
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- [Create a Transaction](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/basic.js#L50)
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- [Create an OP RETURN transaction](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/advanced.js#L24)
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- [Create a 2-of-3 multisig P2SH address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/multisig.js#L9)
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- [Spend from a 2-of-4 multisig P2SH address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/multisig.js#L25)
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- [Generate a single-key stealth address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/stealth.js)
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- [Generate a dual-key stealth address](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/stealth.js)
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- [Recover a BIP32 parent private key from the parent public key and a derived non-hardened child private key](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/bip32.js)
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- [Recover a Private key from duplicate R values in a signature](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/crypto.js)
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- [Create a CLTV locked transaction where the expiry is past](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/cltv.js#L36)
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- [Create a CLTV locked transaction where the parties bypass the expiry](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/cltv.js#L70)
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- [Create a CLTV locked transaction which fails due to expiry in the future](https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/cltv.js#L102)
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If you have a use case that you feel could be listed here, please [ask for it](https://github.com/bitcoinjs/bitcoinjs-lib/issues/new)!
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## Projects utilizing BitcoinJS
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- [BitAddress](https://www.bitaddress.org)
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- [Blockchain.info](https://blockchain.info/wallet)
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- [Blocktrail](https://www.blocktrail.com/)
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- [Dark Wallet](https://www.darkwallet.is/)
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- [DecentralBank](http://decentralbank.com/)
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- [Dogechain Wallet](https://dogechain.info)
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- [EI8HT Wallet](http://ei8.ht/)
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- [GreenAddress](https://greenaddress.it)
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- [Robocoin](https://wallet.robocoin.com)
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- [Skyhook ATM](http://projectskyhook.com)
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## Contributors
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Stefan Thomas is the inventor and creator of this project. His pioneering work made Bitcoin web wallets possible.
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Daniel Cousens, Wei Lu, JP Richardson and Kyle Drake lead the major refactor of the library from 0.1.3 to 1.0.0.
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Since then, many people have contributed. [Click here](https://github.com/bitcoinjs/bitcoinjs-lib/graphs/contributors) to see the comprehensive list.
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## Contributing
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We are always accepting of pull requests, but we do adhere to specific standards in regards to coding style, test driven development and commit messages.
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Please make your best effort to adhere to these when contributing to save on trivial corrections.
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### Running the test suite
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$ npm test
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$ npm run-script coverage
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## Complementing Libraries
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- [BIP21](https://github.com/bitcoinjs/bip21) - A BIP21 compatible URL encoding utility library
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- [BIP38](https://github.com/bitcoinjs/bip38) - Passphrase-protected private keys
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- [BIP39](https://github.com/bitcoinjs/bip39) - Mnemonic generation for deterministic keys
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- [BIP32-Utils](https://github.com/bitcoinjs/bip32-utils) - A set of utilities for working with BIP32
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- [BIP66](https://github.com/bitcoinjs/bip66) - Strict DER signature decoding
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- [BIP69](https://github.com/bitcoinjs/bip69) - Lexicographical Indexing of Transaction Inputs and Outputs
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- [Base58](https://github.com/cryptocoinjs/bs58) - Base58 encoding/decoding
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- [Base58 Check](https://github.com/bitcoinjs/bs58check) - Base58 check encoding/decoding
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- [BCoin](https://github.com/indutny/bcoin) - BIP37 / Bloom Filters / SPV client
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- [coinselect](https://github.com/bitcoinjs/coinselect) - A fee-optimizing, transaction input selection module for bitcoinjs-lib.
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- [insight](https://github.com/bitpay/insight) - A bitcoin blockchain API for web wallets.
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- [merkle-lib](https://github.com/bitcoinjs/merkle-lib) - A performance conscious library for merkle root and tree calculations.
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- [minimaldata](https://github.com/bitcoinjs/minimaldata) - A module to check bitcoin policy: SCRIPT_VERIFY_MINIMALDATA
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## Alternatives
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- [Bitcore](https://github.com/bitpay/bitcore)
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- [Cryptocoin](https://github.com/cryptocoinjs/cryptocoin)
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## LICENSE [MIT](LICENSE)
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## Copyright
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BitcoinJS (c) 2011-2016 bitcoinjs-lib contributors
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Released under MIT license
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