# BitGo UTXO library

This library is a wrapper around [bitcoinjs-lib](https://github.com/bitcoinjs/bitcoinjs-lib) adding altcoin support.

## Features
- Multicoin support: Configurable behaviour based on [network](https://github.com/BitGo/bitgo-utxo-lib/blob/master/src/networks.js) objects.
- Backed by [BitGo](https://www.bitgo.com/info/)

## Installation

``` bash
# using npm
npm install @bitgo/utxo-lib

# using yarn
yarn add @bitgo/utxo-lib
```

## Setup

JavaScript (ESM)
``` javascript
import * as utxolib from '@bitgo/utxo-lib'
```

NodeJS (CJS)
``` javascript
const utxolib = require('@bitgo/utxo-lib')
```

## Usage

Support for parsing and building altcoin transactions is provided by the following methods

``` typescript
utxolib.bitgo.createTransactionFromBuffer(buffer, network): UtxoTransaction
// (similarly `createTransactionFromHex(string, network)`)

utxolib.bitgo.createTransactionBuilderForNetwork(network): UtxoTransactionBuilder

utxolib.bitgo.createTransactionBuilderFromTransaction(tx): UtxoTransactionBuilder
```

The `UtxoTransaction(Builder)` classes have the same interface as the `Transaction` type in `bitcoinjs-lib` .

## Supported coins

|Network|Mainnet|Testnet|
|---|---|---|
|Bitcoin|`utxolib.networks.bitcoin`|`utxolib.networks.testnet`|
|Bitcoin Cash|`utxolib.networks.bitcoincash`|`utxolib.networks.bitcoincashTestnet`|
|Bitcoin Gold|`utxolib.networks.bitcoingold`|`utxolib.networks.bitcoingoldTestnet`|
|Bitcoin SV (Satoshi Vision)|`utxolib.networks.bitcoinsv`|`utxolib.networks.bitcoinsvTestnet`|
|Dash|`utxolib.networks.dash`|`utxolib.networks.dash`|
|Litecoin|`utxolib.networks.litecoin`|`utxolib.networks.litecoinTest`|
|Zcash|`utxolib.networks.zcash`|`utxolib.networks.zcashTest`|

> [Bitcoin SV](https://blog.bitgo.com/bsv-deprecation-6b3fff4df34c) no longer supports sending funds to BitGo wallets. Existing customers with Bitcoin SV in BitGo wallets will still be able to access and sweep funds to an external Bitcoin SV wallet.