zcsigner

Zcash watch only wallet and offline signer.

Use case

Keep the watch only wallet on your phone. You can receive coins and monitor your wallet balance.

Make secure transactions: Start a transaction from your watch-only wallet, sign it on your air gapped phone (in airplane mode), publish it on your first phone. All data transfers are through QR codes and cameras.

Demo: https://www.youtube.com/watch?v=gi99-NRUv1o

Requirements

• Install flutter 2+,
• Requirements android SDK, NDK
• xcode for iOS (not tested)
• Download sapling-output.params and sapling-send.params or copy them from .zcash-params, into assets/

Build/Run development

• cargo make
• flutter run

Build release / install

Follow the instructions https://flutter.dev/docs/deployment/android

• cargo make --profile release
• flutter build apk or flutter build appbundle
• flutter install

Testnet/Mainnet

Currently builds for mainnet. To use testnet instead, edit native/zc_api_ffi/Cargo.toml and remove features: ["mainnet"]

On mainnet, USE AT YOUR OWN RISK. I'm not responsible for any potential loss of money.