Lib.rs

host-wallet — sr25519 key management with platform-native keychain storage.

The wallet holds a BIP-39 mnemonic and derives per-app sr25519 keypairs using Substrate-compatible hard derivation (//app//<app_id>//<index>).

Private key material never leaves this crate. SPAs interact through get_address(app_id) and sign(app_id, payload).