This is the silent payments backend for our flutter silent payments wallet Donationwallet.

Our wallet uses nakamoto (a BIP158 client) and rust-silentpayments. To communicate with flutter, we use flutter_rust_bridge.

Generating the binaries for android requires installing cargo-ndk. Install it by running cargo install cargo-ndk. You may also need to add your desired toolchains:

rustup target add \
    aarch64-linux-android \
    armv7-linux-androideabi \
    x86_64-linux-android \
    i686-linux-android

After these are installed, run just build-android (or just copy the command found in the justfile).

To bridge between flutter and rust, the interface in src/api.rs is exposed to flutter. Whenever this file is updated, you need to run flutter_rust_bridge_codegen. First install it using cargo install flutter_rust_bridge_codegen, then run just gen (or copy the command found in the justfile.