pub(crate) fn requires_unknown_bits(&self) -> bool {
self.flags.iter().enumerate().any(|(idx, &byte)| {
(match idx {
- 0 => (byte & 0b00010100),
+ // Unknown bits are even bits which we don't understand, we list ones which we do
+ // here:
+ // unknown, upfront_shutdown_script, unknown (actually initial_routing_sync, but it
+ // is only valid as an optional feature), and data_loss_protect:
+ 0 => (byte & 0b01000100),
+ // unknown, unknown, unknown, var_onion_optin:
1 => (byte & 0b01010100),
+ // fallback, all even bits set:
_ => (byte & 0b01010101),
}) != 0
})
pub(crate) fn supports_unknown_bits(&self) -> bool {
self.flags.iter().enumerate().any(|(idx, &byte)| {
(match idx {
+ // unknown, upfront_shutdown_script, initial_routing_sync (is only valid as an
+ // optional feature), and data_loss_protect:
0 => (byte & 0b11000100),
+ // unknown, unknown, unknown, var_onion_optin:
1 => (byte & 0b11111100),
_ => byte,
}) != 0
})
}
}
+
+#[cfg(test)]
+mod tests {
+ use super::{ChannelFeatures, InitFeatures, NodeFeatures};
+
+ #[test]
+ fn sanity_test_our_features() {
+ assert!(!ChannelFeatures::supported().requires_unknown_bits());
+ assert!(!ChannelFeatures::supported().supports_unknown_bits());
+ assert!(!InitFeatures::supported().requires_unknown_bits());
+ assert!(!InitFeatures::supported().supports_unknown_bits());
+ assert!(!NodeFeatures::supported().requires_unknown_bits());
+ assert!(!NodeFeatures::supported().supports_unknown_bits());
+
+ assert!(InitFeatures::supported().supports_upfront_shutdown_script());
+ assert!(NodeFeatures::supported().supports_upfront_shutdown_script());
+
+ assert!(InitFeatures::supported().supports_data_loss_protect());
+ assert!(NodeFeatures::supported().supports_data_loss_protect());
+
+ assert!(InitFeatures::supported().supports_variable_length_onion());
+ assert!(NodeFeatures::supported().supports_variable_length_onion());
+
+ let mut init_features = InitFeatures::supported();
+ init_features.set_initial_routing_sync();
+ assert!(!init_features.requires_unknown_bits());
+ assert!(!init_features.supports_unknown_bits());
+ }
+
+ #[test]
+ fn sanity_test_unkown_bits_testing() {
+ let mut features = ChannelFeatures::supported();
+ features.set_require_unknown_bits();
+ assert!(features.requires_unknown_bits());
+ features.clear_require_unknown_bits();
+ assert!(!features.requires_unknown_bits());
+ }
+}