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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.