pub trait U2FToken {
// Required method
fn perform_u2f_sign(
&mut self,
app_bytes: Vec<u8>,
chal_bytes: Vec<u8>,
timeout_ms: u64,
allowed_credentials: &[AllowCredentials],
user_verification: bool,
) -> Result<U2FSignData, WebauthnCError>;
}Available on crate feature
softtoken only.