OBW - The Open Bitcoin Wallet

The Open Bitcoin Wallet (OBW) is an Android Bitcoin and Lightning wallet, a fork of Simple Bitcoin Wallet focused on providing a pleasant and simple experience with advanced features.

How to install OBW

To install the Open Bitcoin Wallet you have 3 options right now:

1. Grab an APK from the releases page
2. Download from Google Play
3. Build from source (see instructions below)

OBW features

Some of the features OBW includes are:

• Lightweight Bitcoin wallet that uses Electrum servers
  • can use an Electrum server specified by the user or random ones
  • support for RBF and CPFP
  • coin control (select which UTXOs to spend or not)
  • payments to multiple addresses
• Standalone, autonomous Lightning capabilities:
  • can connect to any node
  • open channels, close channels, force-close channels, close channels to specific address
  • route payments without the use of any third-party service, all routing done on the wallet
  • offer to retry payments with increased fee tolerance if the first attempts fail
• Private by default
  • when connecting to Lightning peers, uses a different node identity for each peer
  • uses a random node identity for each invoice
  • full TOR support: built-in, no Orbot needed
• Hosted Channels
  • lightweight credit-based virtual channels that use an open and interoperable protocol
  • can open hosted channels to any node that supports the host side of the protocol
  • cannot be traced and do not require capital or chain fee costs
• Split-payments support
  • the same invoice from A can be paid by multiple wallets (B, C, D and so on) atomically
  • perfect for splitting bills at restaurants
• LNURL support
  • get channels with lnurl-channel, lnurl-hosted-channel
  • withdraw from services with lnurl-withdraw
  • login to websites with keyauth (lnurl-auth)
  • pay out to services with lnurl-pay and lightning address, possibly including
    • arbitrary comments
    • free names for tips
    • key and signed keyauth challenges that allow simultaneous payment and login or account referencing
    • unique public keys that allow later payer identification
    • reading successActions that can be
    • free messages from the service to the wallet
    • URLs sent from the service
    • AES-encrypted secrets decryptable only with the payment preimage
• NameDesc!
  • parse NameDesc invoices
  • optionally generate NameDesc invoices

How to build OBW from source

To build the Open Bitcoin Wallet run this:

git clone https://github.com/nbd-wtf/obw.git
cd obw
./gradlew assembleDebug

The APK will be at app/build/outputs/apk/debug.

Other commands: ./gradlew installDebug, ./gradlew assembleRelease, ./gradlew bundleRelease (with Gradle options -PSTORE_FILE=... -PSTORE_PASSWORD=... -PKEY_PASSWORD=... -PKEY_ALIAS=... when signing to publish to Google Play Store).

Immortan

Open Bitcoin Wallet (OBW) is based on Immortan, a versatile, flexible and reasonable library for building lightweight Bitcoin and Lightning wallets.

License

Apache.