jirijakes / liana

The missing safety net for your coins

Liana

The missing safety net for your bitcoins.

About

Liana is a simple Bitcoin wallet. Like other Bitcoin wallets you have one key which can spend the funds in the wallet immediately. Unlike other wallets, Liana lets you in addition specify one key which can only spend the coins after the wallet has been inactive for some time.

We refer to these as the primary spending path (always accessible) and the recovery path (only available after some time of inactivity). You may have more than one key in either the primary or the recovery path (multisig). You may have more than one recovery path.

Here is an example of a Liana wallet configuration:

• Owner's key (can always spend)
• Any 2 keys from the owner's spouse and two kids (after 1 year)
• A third party, in case all else failed (after 1 year and 3 months)

The lockup period is enforced onchain by the Bitcoin network. This is achieved by leveraging timelock capabilities of Bitcoin smart contracts (Script).

Liana can be used for trustless inheritance, loss protection or safer backups. Visit our website for more information.

Usage

Liana is available on Windows, Mac and Linux. To install and start using it see doc/USAGE.md. A more accessible version of Liana is also available as a web application here.

If you just want to quickly try out Liana on Bitcoin Signet, see doc/TRY.md.

Hacking on Liana

Liana is an open source project. It is hosted at Github. Contributions are very welcome. See here for guidelines. Liana is separated in two main components: the daemon and the Graphical User Interface.

Liana daemon

The daemon contains the core logic of the wallet. It is both a library (a Rust crate) that exposes a command interface and a standalone UNIX daemon that exposes a JSONRPC API through a Unix Domain Socket.

The code for the daemon can be found in the src/ folder at the root of this repository.

Liana GUI

The GUI contains both an installer that guides a user through setting up a Liana wallet, as well as a graphical interface to the daemon using the iced library.

The code for the GUI can be found in the gui/src/ folder.

Security

See SECURITY.md for details about reporting a security vulnerability or any bug that could potentially impact the security of users' funds.

License

Released under the BSD 3-Clause Licence. See the LICENCE file.