Beta channel

In order to receive updates quicker than others, you need to do two things:

Join the G+ group so you are eligible for testing
Then explicitly enable beta versions of the software in Google play

As Beta Testers, please make sure you have a recent backup of the masterseed and all private keys inside Mycelium. Beta testers will experience many bugs. So far, restoring the wallet from masterseed has never been necessary, but we offer no guarantees.

Building

To build everything from source, simply checkout the source and build using gradle on the build system you need.

JDK 1.7

Then you need to use the Android SDK manager to install the following components:

ANDROID_HOME environment variable pointing to the directory where the SDK is installed
Android SDK Tools 22.6.4
SDK Platform Tools 19.0.2
Android SDK build Tools 19.1.0
Android 4.4.2 (API 19) (at least SDK Platform Rev. 3)
Android Extras:
- Android Support Repository rev 5
- Android Support Library rev 19.1
- Google Play services for Froyo rev 12
- Google Play services rev 17
- Google Repository rev 8

The project layout is designed to be used with a recent version of Android Studio (currently 1.1.0)

Build commands

On the console type:

git clone https://github.com/mycelium-com/wallet.git
cd wallet

Linux/Mac type:

./gradlew build

Windows type:

gradlew.bat build

Voila, look into wallet/public/mbw/build/apk to see the generated apk. There are versions for both prodnet and testnet.

Alternatively you can install the latest version from the Play store at:

https://play.google.com/store/apps/details?id=com.mycelium.wallet

If you cannot access the Play store, you can obtain the apk directly from https://mycelium.com/bitcoinwallet

Deterministic builds

To validate the Mycelium image you obtain from Google Play Store, you can rebuild the Mycelium wallet yourself using Docker and compare both images following these steps:

Create your own Doker image
```
  $ docker build . --tag mycelium-wallet .
```
Check that this step succeeds by listing the available docker images:
```
  $ docker images 
```
Build Mycelium using Docker
```
  $ docker run --rm -v $(pwd):/project -w /project mycelium-wallet ./gradlew mbw::clean mbw::assembleProdnetRelease
```
After this step succeeds, the mycelium unsigned apk is in mbw/builds/outputs/apk. You may need to create a gradle.properties file and set
```
  org.gradle.jvmargs = -Xmx5120m
```

Retrieve Google Play Mycelium APK from your phone Gets package path:

  $ adb shell pm path com.mycelium.wallet
  package:/data/app/com.mycelium.wallet-1/base.apk

Retrieve file:

  $ adb pull /data/app/com.mycelium.wallet-1/base.apk mycelium-signed.apk

Compare signed apk with unsigned locally built apk using Signal apkdiff

  $ wget https://raw.githubusercontent.com/WhisperSystems/Signal-Android/master/apkdiff/apkdiff.py
  python apkdiff.py mycelium-signed.apk mbw/build/outputs/apk/.....your-prodnet.apk

You might have to sudo chown -R $USER:$USER . as the docker user might create files that you have no access to under your normal user.

This work is based on WhisperSystems Signal reproducible builds:

Features

With the Mycelium Bitcoin Wallet you can send and receive Bitcoins using your mobile phone.

HD enabled - manage multiple accounts and never reuse addresses (Bip32/Bip44 compatible)
Masterseed based - make one backup and be safe for ever. (Bip39)
100% control over your private keys, they never leave your device unless you export them
No block chain download - install and run in seconds
Ultra fast connection to the Bitcoin network through our super nodes
For enhanced privacy and availability you can connect to our super nodes via a tor-hidden service ( .onion address)
Watch-only addresses (single or xPub) & private key (single or xPriv) import for secure cold-storage integration
Directly spend from paper wallets (single key, xPriv or master seed)
Trezor enabled - directly spend from trezor-secured accounts.
Mycelium Entropy compatible Shamir-Secret-Shared 2-out-of-3 keys spending
Secure your wallet with a PIN
Compatible with other bitcoin services through the bitcoin: URI scheme

Please note that bitcoin is still experimental and this app comes with no warranty - while we make sure to adhere to the highest standards of software craftsmanship we can not exclude that the software contains bugs. Please make sure you have backups of your private keys and do not use this for more than you are willing to lose.

This application's source is published at https://github.com/mycelium-com/wallet We need your feedback. If you have a suggestion or a bug to report open an issue at: https://github.com/mycelium-com/wallet/issues

More features:

Sources available for review: https://github.com/mycelium-com/wallet
Multiple HD accounts, private keys, external xPub or xPriv accounts
Multiple Bitcoin denominations: BTC, mBTC, bits and uBTC
View your balance in multiple fiat currencies: USD, AUD, CAD, CHF, CNY, DKK, EUR, GBP, HKD, JPY, NZD, PLN, RUB, SEK, SGD, THB, and many more
Send and receive by specifying an amount in fiat and switch between fiat and BTC while entering the amount
Address book for commonly used addresses
Transaction history with detailed information and local stored comments
Import private keys using SIPA (the ones beginning with a 5) and mini private key format (Casascius private keys) from QR-codes or clipboard
Export private-, xPub- or xPriv-keys as QR-codes, on clipboard or share with other applications
Share your bitcoin address using Twitter, Facebook, email and more.
Integrated QR-code scanner
Client side load balancing between three 100% redundant server nodes located in different data centers.
Sign Messages using your private keys (compatible with bitcoin-qt)

Authors

Jan Møller
Andreas Petersson
Daniel Weigl
Jan Dreske
Dmitry Murashchik
Constantin Vennekel
Leo Wandersleb
Daniel Krawisz
Jerome Rousselot
Elvis Kurtnebiev
Sergey Dolgopolov

Credits

Thanks to all collaborators who provided us with code or helped us with integrations! Just to name a few:

Nicolas Bacca from Ledger
Sipa, Marek and others from Trezor
Jani and Aleš from Cashila
Kalle Rosenbaum, Bip120/121
David and Alex from Glidera
Wiz for helping us with KeepKey
Tom Bitton and Asa Zaidman from Simplex
(if you think you should be mentioned here, just notify us)

Thanks to Jethro for tirelessly testing the app during beta development.

Thanks to our numerous volunteer translators who provide high-quality translations in many languages. Your name should be listed here, please contact me so I know you want to be included.

Thanks to Johannes Zweng for his testing and providing pull requests for fixes.

Thanks to all beta testers to provide early feedback.

gkisiel / wallet-android