A javascript Bitcoin Vault library for node.js and browsers. Written in TypeScript, but committing the JS files to verify.

Released under the terms of the MIT LICENSE.

Presently, we do not have any formal documentation other than our examples.

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.

The recommended method of using btcvjs-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 https://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).

WARNING: iOS devices have problems, use atleast [email protected] or greater, and enforce the test suites (for Buffer, and any other dependency) pass before use.

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

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).

• 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)

See CONTRIBUTING.md.

npm test
npm run-script coverage

• 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 compliant Bech32 encoding library
• coinselect - A fee-optimizing, transaction input selection module for btcvjs-lib.
• merkle-lib - A performance conscious library for merkle root and tree calculations.
• minimaldata - A module to check bitcoin policy: SCRIPT_VERIFY_MINIMALDATA

• BCoin
• Bitcore
• Cryptocoin