Dedoo CoinJS Library (dedoo-coinjs-lib)

A blockchain-agnostic JavaScript library for Bitcoin-like cryptocurrencies. Built for node.js and browsers with full TypeScript support.

🚀 Key Features:

• Blockchain Agnostic: Works with Bitcoin, Junkcoin, Craftcoin, DogecoinEV, Lebowski, and any Bitcoin-like blockchain
• Dynamic Network Registry: Add new blockchain support without modifying the library
• TypeScript Support: Full type definitions included
• Multi-Chain Wallet Support: Perfect for multi-blockchain wallets
• Production Ready: Thoroughly tested and battle-tested

Released under the terms of the MIT LICENSE.

🌟 Why Choose dedoo-coinjs-lib?

Unlike traditional Bitcoin libraries that are hardcoded for specific networks, dedoo-coinjs-lib provides true blockchain agnosticism:

• ✅ No Hardcoded Networks: All network parameters are configurable
• ✅ Runtime Network Registration: Add new blockchains dynamically
• ✅ Consistent API: Same interface across all supported blockchains
• ✅ Future Proof: Easy to extend for new Bitcoin-like cryptocurrencies

📦 Installation

npm install dedoo-coinjs-lib

🔧 Quick Start

Basic Usage

import { networks, payments } from 'dedoo-coinjs-lib';

// Register a custom blockchain
networks.register('mycoin', {
  messagePrefix: '\\x19MyCoin Signed Message:\\n',
  bech32: 'mc',
  bip32: {
    public: 0x0488b21e,
    private: 0x0488ade4,
  },
  pubKeyHash: 0,
  scriptHash: 5,
  wif: 128,
  pchMessageStart: [0xf9, 0xbe, 0xb4, 0xd9]
});

// Use the registered network
const network = networks.get('mycoin');
const payment = payments.p2pkh({ pubkey: Buffer.from('...'), network });

🔗 Ecosystem

dedoo-coinjs-lib is part of the Dedoo blockchain-agnostic ecosystem:

• dedoopair - ECPair key management
• dedoohdw - HD wallet functionality
• dedoo-inscriber - Inscription support
• dedoo-wallet-sdk - Provider SDK
• dedoo-ordutils - Ordinals utilities

🤝 Contributing

We welcome contributions! Please see our Contributing Guide for details.

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🔗 Links

• NPM Package: https://www.npmjs.com/package/dedoo-coinjs-lib
• GitHub Repository: https://github.com/dedooxyz/dedoo-coinjs-lib
• Documentation: https://docs.dedoo.xyz
• Website: https://dedoo.xyz

🆘 Support

• GitHub Issues: https://github.com/dedooxyz/dedoo-coinjs-lib/issues
• Community: https://discord.gg/dedoo
• Email: support@dedoo.xyz

---

Built with ❤️ by the Dedoo Development Team

No we will not make a Discord.

Installation

npm install bitcoinjs-lib
# optionally, install a key derivation library as well
npm install ecpair bip32
# ecpair is the ECPair class for single keys
# bip32 is for generating HD keys

Previous versions of the library included classes for key management (ECPair, HDNode(->"bip32")) but now these have been separated into different libraries. This lowers the bundle size significantly if you don't need to perform any crypto functions (converting private to public keys and deriving HD keys).

Typically we support the Node Maintenance LTS version. TypeScript target will be set to the ECMAScript version in which all features are fully supported by current Active Node LTS. However, depending on adoption among other environments (browsers etc.) we may keep the target back a year or two. If in doubt, see the main_ci.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.

Usage

Crypto is hard.

When working with private keys, the random number generator is fundamentally one of the most important parts of any software you write. For random number generation, we default to the randombytes module, which uses window.crypto.getRandomValues in the browser, or Node js' crypto.randomBytes, depending on your build system. Although this default is ~OK, there is no simple way to detect if the underlying RNG provided is good enough, or if it is catastrophically bad. You should always verify this yourself to your own standards.

This library uses tiny-secp256k1, which uses RFC6979 to help prevent k re-use and exploitation. Unfortunately, this isn't a silver bullet. Often, Javascript itself is working against us by bypassing these counter-measures.

Problems in Buffer (UInt8Array), for example, can trivially result in catastrophic fund loss without any warning. It can do this through undermining your random number generation, accidentally producing a duplicate k value, sending Bitcoin to a malformed output script, or any of a million different ways. Running tests in your target environment is important and a recommended step to verify continuously.

Finally, adhere to best practice. We are not an authoritative source of best practice, but, at the very least:

• Don't reuse addresses.
• Don't share BIP32 extended public keys ('xpubs'). They are a liability, and it only takes 1 misplaced private key (or a buggy implementation!) and you are vulnerable to catastrophic fund loss.
• Don't use Math.random - in any way - don't.
• Enforce that users always verify (manually) a freshly-decoded human-readable version of their intended transaction before broadcast.
• Don't ask users to generate mnemonics, or 'brain wallets', humans are terrible random number generators.
• Lastly, if you can, use Typescript or similar.

Browser

The recommended method of using bitcoinjs-lib in your browser is through browserify.

If you'd like to use a different (more modern) build tool than browserify, you can compile just this library and its dependencies into a single JavaScript file:

$ npm install bitcoinjs-lib browserify
$ npx browserify --standalone bitcoin - -o bitcoinjs-lib.js <<<"module.exports = require('bitcoinjs-lib');"

Which you can then import as an ESM module:

<script type="module">import "/scripts/bitcoinjs-lib.js"</script>

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).

WARNING: iOS devices have problems, use at least buffer@5.0.5 or greater, and enforce the test suites (for Buffer, and any other dependency) pass before use.

Typescript or VSCode users

Type declarations for Typescript are included in this library. Normal installation should include all the needed type information.

Examples

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).

• Taproot Key Spend
• Generate a random address
• Import an address via WIF
• Generate a 2-of-3 P2SH multisig address
• Generate a SegWit address
• Generate a SegWit P2SH address
• Generate a SegWit 3-of-4 multisig address
• Generate a SegWit 2-of-2 P2SH multisig address
• Support the retrieval of transactions for an address (3rd party blockchain)
• Generate a Testnet address
• Generate a Litecoin address
• Create a 1-to-1 Transaction
• Create (and broadcast via 3PBP) a typical Transaction
• Create (and broadcast via 3PBP) a Transaction with an OP_RETURN output
• Create (and broadcast via 3PBP) a Transaction with a 2-of-4 P2SH(multisig) input
• Create (and broadcast via 3PBP) a Transaction with a SegWit P2SH(P2WPKH) input
• Create (and broadcast via 3PBP) a Transaction with a SegWit P2WPKH input
• Create (and broadcast via 3PBP) a Transaction with a SegWit P2PK input
• Create (and broadcast via 3PBP) a Transaction with a SegWit 3-of-4 P2SH(P2WSH(multisig)) input
• Create (and broadcast via 3PBP) a Transaction and sign with an HDSigner interface (bip32)
• Import a BIP32 testnet xpriv and export to WIF
• Export a BIP32 xpriv, then import it
• Export a BIP32 xpub
• Create a BIP32, bitcoin, account 0, external address
• Create a BIP44, bitcoin, account 0, external address
• Create a BIP49, bitcoin testnet, account 0, external address
• Use BIP39 to generate BIP32 addresses
• Create (and broadcast via 3PBP) a Transaction where Alice can redeem the output after the expiry (in the past)
• Create (and broadcast via 3PBP) a Transaction where Alice can redeem the output after the expiry (in the future)
• Create (and broadcast via 3PBP) a Transaction where Alice and Bob can redeem the output at any time
• Create (but fail to broadcast via 3PBP) a Transaction where Alice attempts to redeem before the expiry
• Create (and broadcast via 3PBP) a Transaction where Alice can redeem the output after the expiry (in the future) (simple CHECKSEQUENCEVERIFY)
• Create (but fail to broadcast via 3PBP) a Transaction where Alice attempts to redeem before the expiry (simple CHECKSEQUENCEVERIFY)
• Create (and broadcast via 3PBP) a Transaction where Bob and Charles can send (complex CHECKSEQUENCEVERIFY)
• Create (and broadcast via 3PBP) a Transaction where Alice (mediator) and Bob can send after 2 blocks (complex CHECKSEQUENCEVERIFY)
• Create (and broadcast via 3PBP) a Transaction where Alice (mediator) can send after 5 blocks (complex CHECKSEQUENCEVERIFY)

If you have a use case that you feel could be listed here, please ask for it!

Contributing

See CONTRIBUTING.md.

Running the test suite

npm test
npm run-script coverage

Complementing Libraries

• BIP21 - A BIP21 compatible URL encoding library
• BIP38 - Passphrase-protected private keys
• BIP39 - Mnemonic generation for deterministic keys
• BIP32-Utils - A set of utilities for working with BIP32
• BIP66 - Strict DER signature decoding
• BIP68 - Relative lock-time encoding library
• BIP69 - Lexicographical Indexing of Transaction Inputs and Outputs
• Base58 - Base58 encoding/decoding
• Base58 Check - Base58 check encoding/decoding
• Bech32 - A BIP173/BIP350 compliant Bech32/Bech32m encoding library
• coinselect - A fee-optimizing, transaction input selection module for bitcoinjs-lib.
• merkle-lib - A performance conscious library for merkle root and tree calculations.
• minimaldata - A module to check bitcoin policy: SCRIPT_VERIFY_MINIMALDATA

Alternatives

• BCoin
• Bitcore
• Cryptocoin

LICENSE MIT