Android SPV wallets by Guarda

All Guarda single-currency wallets are available in open-source. The wallets are designed to store, manage, transfer and receive cryptocurrency. The applications also include an option to purchase coins with a banking card and top up wallets via the built-in Exchange service.

Guarda does not store any personal information, wallet data or private keys of our clients. The private key is stored in the mobile device’s secure memory and deletes itself if the user logs out from the wallet. In order to secure the funds, a backup of the private key or the json backup feature are created. A pin code access is also available.

How to install

Read the detailed instruction here.

About

Cryptocurrency wallets support:

• ZEC Shielded (Z-addresses, mainnet) - /APKs/zec-shielded-mainnet.apk

• ZEC Shielded (Z-addresses, testnet) - /APKs/zec-shielded-testnet.apk
• BTC (Bitcoin) - /APKs/btc-release.apk
• ETH (Ethereum) - /APKs/eth-release.apk
• BCH (Bitcoin Cash) - /APKs/bch-release.apk
• LTC (Litecoin) - /APKs/ltc-release.apk
• IOTA (Iota) - /APKs/iota-release.apk
• ETC (Ethereum Classic) - /APKs/etc-release.apk
• BTG (Bitcoin Gold) - /APKs/btg-release.apk
• QTUM (Qtum) - /APKs/qtum-release.apk
• BTS (BitShares) - /APKs/bts-release.apk
• DGB (DigiByte) - /APKs/dgb-release.apk
• KMD (Komodo) - /APKs/kmd-release.apk
• CLO (Callisto) - /APKs/clo-release.apk
• DCT (Decent) - /APKs/dct-release.apk
• SBTC (Super Bitcoin) - /APKs/sbtc-release.apk

Do not see your coin?

See below (pull-request section)

Installation

Just download a last version of APK-file from a link in About section and install on your device. Click the link and then Download button or right click on the link and choose Save link as....

Or build it yourself:

1. Download and install Java 7 or up (https://www.oracle.com/technetwork/java/javase/downloads/index.html)
2. Download and Install the latest Android studio (https://developer.android.com/studio/)
3. Clone or download the project
4. Clean\Rebuild\Build if needed
5. Open Build Variants and choose a wallet. For example “btcDebug” (all variants described in app/build.gradle).
6. For build on your device (or emulator) tap Run.
7. For build APK-file select menu Build -> Build APK(s)

Pull-requests

If you would like to contribute code you can do so through GitHub by forking the repository and sending a pull request.

If you want to add your own coin you need to discover of this files: app/src/btc/java/com/guarda/ethereum/managers/WalletManager.java - for BTC-like app/src/eth/java/com/guarda/ethereum/managers/WalletManager.java - for ETH-like

In other cases you need to follow the existing API of WalletManager.java and implement methods for creating and restore wallet, generating a public address and creating a transaction (or something else specific for your coin).

If you have any question create an issue.

License

Library are licensed under the GPL-3.0 License.

Enjoy! Guarda Team hopes you will like using our wallets as much as we liked creating them.