React Native Breez SDK

The Breez SDK enables mobile developers to integrate Lightning and bitcoin payments into their apps with a very shallow learning curve. The use cases are endless – from social apps that want to integrate tipping between users to content-creation apps interested in adding bitcoin monetization. Crucially, this SDK is an end-to-end, non-custodial, drop-in solution powered by Greenlight, a built-in LSP, on-chain interoperability, third-party fiat on-ramps, and other services users and operators need.

The Breez SDK provides the following services:
* Sending payments (via various protocols such as: bolt11, keysend, lnurl-pay, lightning address, etc.)
* Receiving payments (via various protocols such as: bolt11, lnurl-withdraw, etc.)
* Fetching node status (e.g. balance, max allow to pay, max allow to receive, on-chain balance, etc.)
* Connecting to a new or existing node.

Installation

``bash
npm install @breeztech/react-native-breez-sdk
`
or

`bash
yarn add @breeztech/react-native-breez-sdk
`

$3

If your project uses a React Native version less < 0.71.0, and you want to build your app for Android, you might run into an error like this:

`
2 files found with path 'lib/arm64-v8a/libc++_shared.so' from inputs:
- /(...)/.gradle/caches/transforms-3/c476ede63d070b991438fe0d1c323931/transformed/jetified-react-native-0.68.6/jni/arm64-v8a/libc++_shared.so
- /(...)/.gradle/caches/transforms-3/7c318ac8dd87c1f0c7540616d6d47bd8/transformed/jetified-breez-sdk-0.1.3/jni/arm64-v8a/libc++_shared.so
`

To fix this you need to disambiguate which file to use by adding the following snippet to your app's android/app/build.gradle:

`gradle
android {
// ...
packagingOptions {
pickFirst 'lib/x86/libc++_shared.so'
pickFirst 'lib/x86_64/libc++_shared.so'
pickFirst 'lib/armeabi-v7a/libc++_shared.so'
pickFirst 'lib/arm64-v8a/libc++_shared.so'
}
}
`

Both the Breez SDK as well as React Native package the libc++_shared.so native library.
React Native versions below 0.71.0 have a bug where they cannot automatically handle multiple versions of this file.
This has been fixed in React Native 0.71.0 and thus the above snippet only needs to be added to projects using React Native < 0.71.0.

Usage

For a more in-depth look at using the Breez SDK, you can follow these examples in the SDK overview.

Please contact support@breez.technology to request a Breez API Key.
`ts
import React, { useEffect } from "react"
import {
BreezEvent,
defaultConfig,
EnvironmentType,
NodeConfigVariant,
sendPayment,
connect
} from "@breeztech/react-native-breez-sdk";
import BuildConfig from "react-native-build-config"

const App = () => (
...

const onEvent = (breezEvent: BreezEvent) => {
console.log(${JSON.stringify(breezEvent)})
}

const payInvoice = async (bolt11: string, amountMsat?: number) => {
// Pay invoice
const payment = await sendPayment({ bolt11, amountMsat });
}

useEffect(() => {
const asyncFn = async () => {
// Create the specific node configuration
const nodeConfig = {
type: NodeConfigVariant.GREENLIGHT,
config: {
partnerCredentials: {
deviceKey: null,
deviceCert: null
}
}
}

// Construct the sdk default config
const config = await defaultConfig(EnvironmentType.PRODUCTION, BuildConfig.BREEZ_API_KEY, nodeConfig)

// Connect to the Breez SDK make it ready to use
await connect(config, seed, onEvent)
}

asyncFn()
}, [])

...
)

export default App
`

Example

In the example folder of the Breez SDK repository you will find a basic application for using Breez SDK. Change directory into the folder and install the dependencies:
`bash
yarn
`
Then to run on android:
`bash
yarn android
`
or for iOS:
`bash
yarn pods && yarn ios
``