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This is the source code repository for muun's android wallet. Muun is a non-custodial 2-of-2 multisig wallet with a special focus on security and ease of use.


The app follows the clean architecture pattern, and has three layers:

  • Data: handles the data backends, such as the database, the operating system, or the network.
  • Domain: contains the models and business logic (use cases in clean architecture lingo).
  • Presentation: contains the UI code.

There's also a pure java common module with code shared all over.


For instructions on how to build Muun Wallet please refer to


  • Most of the key handling and transaction crafting operations happen in the common module.
  • All the keystore and data handling happens in the data layer.
  • All the business logic that decides when to sign what happens in the domain layer.
  • The presentation layer only depends on the domain layer, it never references data directly.

Responsible Disclosure

Send us an email to report any security related bugs or vulnerabilities at

You can encrypt your email message using our public PGP key.

Public key fingerprint: 1299 28C1 E79F E011 6DA4 C80F 8DB7 FD0F 61E6 ED76