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Breez SDK

Overview

The Breez SDK enables 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 is free for developers.

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.

Download our one pager here.

To get started with the Breez SDK, follow these examples.

Note: in order to use the Breez SDK you need an API key from Breez, please email us at [email protected] for more information.

Demo

demo.mp4

For a higher resolution video, click here.

Features

Screenshot_2023-06-27-20-18-57-35_e2d5b3f32b79de1d45acd1fad96fbb0f

Using the SDK

To get started with the Breez SDK, follow these examples.

API

API documentation is here.

Support

Join this telegram group.

Architecture

This diagram is a high-level description of the Breez SDK:

SDK Architecture

Command line

Breez sdk-cli is a command line client that allows you to test the functionality of the Breez SDK.

Build & Test

The libs folder contains three sub folders and is a structured as a cargo workspace:

  • sdk-core: the core SDK rust library.
  • sdk-bindings: ffi bindings for Kotlin, Python, Swift, C# and Go.
  • sdk-flutter: a flutter plugin (includes ffi bindings for dart).
  • sdk-react-native: a react-native plugin.

The tools folder contains a simple command line interface (sdk-cli) to the SDK. See the instructions in each sub project readme on how to build, test and run.

TODOs

  • ‘On-the-fly’ channel creation
  • Send/receive bolt11
  • LNURL-Pay
  • LNURL-Withdraw
  • Backup/restore using mnemonics
  • Send zero-amount invoices
  • Fiat currencies
  • Send spontaneous payments
  • Send to a Lightning address
  • Send to BIP 21
  • cli inteface
  • Swift bindings
  • Kotlin bindings
  • API key
  • Receive via on-chain address
  • React Native bindings
  • LNURL-Auth
  • Send to an on-chain address
  • MoonPay fiat on-ramp
  • C# bindings
  • Python bindings
  • Spend all funds
  • Webhook for receiving payments
  • Offline receive via notifications
  • LSPS2 support
  • LSPS1 support
  • Send/receive bolt12
  • Simplifed key management (cloud key backup)
  • WebAssembly support
  • Improve key share
  • Close channels to a predefined address
  • Make mempool.space dependency optional
  • Receive 0 amount invoice via LSP (unified QR)
  • Async payments
  • LDK support
  • Splicing