pub fn get_slatepack_secret_key<'a, L, C, K>(
    wallet_inst: Arc<Mutex<Box<dyn WalletInst<'a, L, C, K>>>>,
    keychain_mask: Option<&SecretKey>,
    index: u32
) -> Result<SecretKey, Error>
where L: WalletLCProvider<'a, C, K>, C: NodeClient + 'a, K: Keychain + 'a,
Expand description

Retrieve the decryption key for the current parent key the given index