Breez Mobile Client

Breez is a Lightning Network mobile client and a hub. It provides a platform for simple, instantaneous bitcoin payments.
Breez is currently in a public beta, available on Android and on iOS.
To learn more about it, please read Introducing Breez.

Features

• [x] lnd on Android
• [x] Neutrino on Android
• [x] Seamless hub channel creation
• [x] Adding funds using on-chain tx
• [x] BTC & Satoshi units
• [x] Random avatars
• [x] Connect to Pay: simple interface to execute payments between users
• [x] A full lncli interface to query and execute ln commands
• [x] Filter tx by type
• [x] Filter tx by date
• [x] Pay invoice (link or QR) from other ln wallets
• [x] Create invoice (link or QR) to be paid by other ln wallets
• [x] Removing funds to an on-chain address
• [x] SubmarineSwaps for adding on-chain funds including refund functionality
• [x] End-to-end encryption of Connect-to-Pay session
• [x] Make Connect-to-Pay links work for users that didn't yet install Breez
• [x] Ability to Backup/Restore the ln node
• [x] Mainnet support
• [x] Support zero-sat invoices
• [x] Startup optimizations
• [x] Background sync via FCM
• [x] Marketplace w/ Bitrefill
• [x] Adding funds via vouchers
• [x] Backup improvements
• [x] Add background ChannelsWatcher job
• [x] Expose Bitcoin Node (BIP157) configuration
• [x] iOS support
• [x] Add webLN support
• [x] Fiat units
• [x] Optional PIN
• [x] Adding funds via credit card
• [x] Add stronger encryption to cloud backup
• [x] iCloud backup option
• [x] Dark mode
• [x] Export payments to .csv
• [x] Support 3rd-party LSPs
• [x] Biometric login
• [x] Fast onboarding
• [x] Pay w/o full sync
• [x] Implement lnurl-withdraw
• [x] Send on-chain via reverse Submarine Swaps
• [x] Improve hodl invoice support
• [x] POS POC release
• [x] Spontaneous payments to node id (nodes running with --accept-keysend)
• [x] Fast graph sync
• [x] Scan QR code from an image
• [x] Import/export POS items
• [x] Support zero-conf channels
• [x] 'On-the-fly' channel creation (increase limit)
• [x] Remove reserve working using Breez channels
• [x] Support additional fiat currencies
• [x] Support LNURL-Auth & LNURL-Fallback
• [x] Print POS transactions
• [x] Hide balance
• [x] Read NFC tags on Android
• [x] In-app podcast player (podcasting 2.0)
• [x] Backup to WebDav servers (e.g. Nextcloud)
• [x] Support LNURL-Pay (bounty redeemed)
• [x] Send to a Lightning address
• [x] Boostagrams
• [x] WebDav backups
• [x] Sales reports
• [x] Top podcasts
• [x] NFC checkout
• [x] Tor support (Android)
• [x] Neutrino sync optimizations
• [x] Co-operative Close Channels
• [ ] Async payments

System Requirements

• Android 7+ 64bit
• iPhone 6+

Setting up the environment

Prerequisites

Make sure you have Flutter 3 installed on your system before continuing the setup process.

Setting up for Android

1. Build breez.aar as described in https://github.com/breez/breez
2. Create a symlink from the breez.aar to android/app/libs directory.
3. Create an Android app on Firebase and download google-services.json file.

• Package name (for debugging): com.breez.client.debug

4. Copy the downloaded google-services.json file to android/app/src/client folder.

Setting up for iOS

1. Build and bindings.xcframework as described in https://github.com/breez/breez
2. Copy the bindings.xcframework directory to the ios directory.
3. Create an iOS app on Firebase and download GoogleServices-info.plist file.
4. Copy the downloaded GoogleServices-info.plist file to ios/Runner folder.
5. Run pod install from breezmobile/ios

Building and Running

# Install dependencies for building
flutter pub get

# Run a client app on the connected device
flutter run --flavor=client

# Build a client app as APK file
flutter build apk --target-platform=android-arm64 --flavor=client --debug

Overview for Developers

Running Breez in simnet