X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Ffeatures.rs;h=642298f56ed52265952eb2b4642163a06f5b0474;hb=62236c70d863bf9456e28a3a1ba784b2e4680a88;hp=91922f1a45f26748f9fdaf8c7ba009a068f6d6b9;hpb=e94e403dda57e1443fdeda9f1d0b2cb8a9e7fb0f;p=rust-lightning diff --git a/lightning/src/ln/features.rs b/lightning/src/ln/features.rs index 91922f1a..642298f5 100644 --- a/lightning/src/ln/features.rs +++ b/lightning/src/ln/features.rs @@ -39,8 +39,13 @@ //! (see [BOLT-4](https://github.com/lightning/bolts/blob/master/04-onion-routing.md) for more information). //! - `BasicMPP` - requires/supports that a node can receive basic multi-part payments //! (see [BOLT-4](https://github.com/lightning/bolts/blob/master/04-onion-routing.md#basic-multi-part-payments) for more information). +//! - `Wumbo` - requires/supports that a node create large channels. Called `option_support_large_channel` in the spec. +//! (see [BOLT-2](https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#the-open_channel-message) for more information). //! - `ShutdownAnySegwit` - requires/supports that future segwit versions are allowed in `shutdown` //! (see [BOLT-2](https://github.com/lightning/bolts/blob/master/02-peer-protocol.md) for more information). +//! - `OnionMessages` - requires/supports forwarding onion messages +//! (see [BOLT-7](https://github.com/lightning/bolts/pull/759/files) for more information). +//! TODO: update link //! - `ChannelType` - node supports the channel_type field in open/accept //! (see [BOLT-2](https://github.com/lightning/bolts/blob/master/02-peer-protocol.md) for more information). //! - `SCIDPrivacy` - supply channel aliases for routing @@ -164,7 +169,8 @@ mod sealed { ], optional_features: [ // Note that if new "non-channel-related" flags are added here they should be - // explicitly cleared in InitFeatures::known_channel_features. + // explicitly cleared in InitFeatures::known_channel_features and + // NodeFeatures::known_channel_features. // Byte 0 DataLossProtect | InitialRoutingSync | UpfrontShutdownScript | GossipQueries, // Byte 1 @@ -174,7 +180,7 @@ mod sealed { // Byte 3 ShutdownAnySegwit, // Byte 4 - , + OnionMessages, // Byte 5 ChannelType | SCIDPrivacy, // Byte 6 @@ -208,7 +214,7 @@ mod sealed { // Byte 3 ShutdownAnySegwit, // Byte 4 - , + OnionMessages, // Byte 5 ChannelType | SCIDPrivacy, // Byte 6 @@ -435,8 +441,6 @@ mod sealed { define_feature!(27, ShutdownAnySegwit, [InitContext, NodeContext], "Feature flags for `opt_shutdown_anysegwit`.", set_shutdown_any_segwit_optional, set_shutdown_any_segwit_required, supports_shutdown_anysegwit, requires_shutdown_anysegwit); - // We do not yet advertise the onion messages feature bit, but we need to detect when peers - // support it. define_feature!(39, OnionMessages, [InitContext, NodeContext], "Feature flags for `option_onion_messages`.", set_onion_messages_optional, set_onion_messages_required, supports_onion_messages, requires_onion_messages); @@ -470,6 +474,17 @@ pub struct Features { mark: PhantomData, } +impl Features { + pub(crate) fn or(mut self, o: Self) -> Self { + let total_feature_len = cmp::max(self.flags.len(), o.flags.len()); + self.flags.resize(total_feature_len, 0u8); + for (byte, o_byte) in self.flags.iter_mut().zip(o.flags.iter()) { + *byte |= *o_byte; + } + self + } +} + impl Clone for Features { fn clone(&self) -> Self { Self { @@ -532,16 +547,6 @@ impl InitFeatures { Ok(()) } - /// or's another InitFeatures into this one. - pub(crate) fn or(mut self, o: InitFeatures) -> InitFeatures { - let total_feature_len = cmp::max(self.flags.len(), o.flags.len()); - self.flags.resize(total_feature_len, 0u8); - for (byte, o_byte) in self.flags.iter_mut().zip(o.flags.iter()) { - *byte |= *o_byte; - } - self - } - /// Converts `InitFeatures` to `Features`. Only known `InitFeatures` relevant to context `C` /// are included in the result. pub(crate) fn to_context(&self) -> Features { @@ -554,6 +559,16 @@ impl InitFeatures { Self::known() .clear_initial_routing_sync() .clear_gossip_queries() + .clear_onion_messages() + } +} + +impl NodeFeatures { + /// Returns the set of known node features that are related to channels. + pub fn known_channel_features() -> NodeFeatures { + Self::known() + .clear_gossip_queries() + .clear_onion_messages() } } @@ -787,6 +802,13 @@ impl Features { } } +impl Features { + pub(crate) fn clear_onion_messages(mut self) -> Self { + ::clear_bits(&mut self.flags); + self + } +} + impl Features { #[cfg(test)] pub(crate) fn clear_shutdown_anysegwit(mut self) -> Self { @@ -913,6 +935,11 @@ mod tests { assert!(!InitFeatures::known().requires_wumbo()); assert!(!NodeFeatures::known().requires_wumbo()); + assert!(InitFeatures::known().supports_onion_messages()); + assert!(NodeFeatures::known().supports_onion_messages()); + assert!(!InitFeatures::known().requires_onion_messages()); + assert!(!NodeFeatures::known().requires_onion_messages()); + assert!(InitFeatures::known().supports_zero_conf()); assert!(!InitFeatures::known().requires_zero_conf()); assert!(NodeFeatures::known().supports_zero_conf()); @@ -957,7 +984,7 @@ mod tests { // - var_onion_optin (req) | static_remote_key (req) | payment_secret(req) // - basic_mpp | wumbo // - opt_shutdown_anysegwit - // - + // - onion_messages // - option_channel_type | option_scid_alias // - option_zeroconf assert_eq!(node_features.flags.len(), 7); @@ -965,7 +992,7 @@ mod tests { assert_eq!(node_features.flags[1], 0b01010001); assert_eq!(node_features.flags[2], 0b00001010); assert_eq!(node_features.flags[3], 0b00001000); - assert_eq!(node_features.flags[4], 0b00000000); + assert_eq!(node_features.flags[4], 0b10000000); assert_eq!(node_features.flags[5], 0b10100000); assert_eq!(node_features.flags[6], 0b00001000); }