X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Ffeatures.rs;h=492cf5ccd198c2829b73b81ab4e5558b9cd14028;hb=288b93b3dada1f8b6f4a4359f0977d2a0c7c61fe;hp=507316d6b3b4612d1f9d5725e85dea956a87271b;hpb=1ec0232dc5081eebb5bd448a6a0963381f3c0fc6;p=rust-lightning diff --git a/lightning/src/ln/features.rs b/lightning/src/ln/features.rs index 507316d6..492cf5cc 100644 --- a/lightning/src/ln/features.rs +++ b/lightning/src/ln/features.rs @@ -22,8 +22,9 @@ //! [BOLT #9]: https://github.com/lightningnetwork/lightning-rfc/blob/master/09-features.md //! [messages]: crate::ln::msgs -use std::{cmp, fmt}; -use std::marker::PhantomData; +use prelude::*; +use core::{cmp, fmt}; +use core::marker::PhantomData; use bitcoin::bech32; use bitcoin::bech32::{Base32Len, FromBase32, ToBase32, u5, WriteBase32}; @@ -31,6 +32,7 @@ use ln::msgs::DecodeError; use util::ser::{Readable, Writeable, Writer}; mod sealed { + use prelude::*; use ln::features::Features; /// The context in which [`Features`] are applicable. Defines which features are required and @@ -122,6 +124,12 @@ mod sealed { , // Byte 3 , + // Byte 4 + , + // Byte 5 + , + // Byte 6 + , ], optional_features: [ // Byte 0 @@ -132,6 +140,12 @@ mod sealed { BasicMPP, // Byte 3 ShutdownAnySegwit, + // Byte 4 + , + // Byte 5 + , + // Byte 6 + Keysend, ], }); define_context!(ChannelContext { @@ -297,29 +311,11 @@ mod sealed { define_feature!(27, ShutdownAnySegwit, [InitContext, NodeContext], "Feature flags for `opt_shutdown_anysegwit`.", set_shutdown_any_segwit_optional, set_shutdown_any_segwit_required); + define_feature!(55, Keysend, [NodeContext], + "Feature flags for keysend payments.", set_keysend_optional, set_keysend_required); #[cfg(test)] - define_context!(TestingContext { - required_features: [ - // Byte 0 - , - // Byte 1 - , - // Byte 2 - UnknownFeature, - ], - optional_features: [ - // Byte 0 - , - // Byte 1 - , - // Byte 2 - , - ], - }); - - #[cfg(test)] - define_feature!(23, UnknownFeature, [TestingContext], + define_feature!(123456789, UnknownFeature, [NodeContext, ChannelContext, InvoiceContext], "Feature flags for an unknown feature used in testing.", set_unknown_feature_optional, set_unknown_feature_required); } @@ -488,13 +484,14 @@ impl Features { /// Converts `Features` to `Features`. Only known `T` features relevant to context `C` are /// included in the result. fn to_context_internal(&self) -> Features { - let byte_count = C::KNOWN_FEATURE_MASK.len(); + let from_byte_count = T::KNOWN_FEATURE_MASK.len(); + let to_byte_count = C::KNOWN_FEATURE_MASK.len(); let mut flags = Vec::new(); for (i, byte) in self.flags.iter().enumerate() { - if i < byte_count { - let known_source_features = T::KNOWN_FEATURE_MASK[i]; - let known_target_features = C::KNOWN_FEATURE_MASK[i]; - flags.push(byte & known_source_features & known_target_features); + if i < from_byte_count && i < to_byte_count { + let from_known_features = T::KNOWN_FEATURE_MASK[i]; + let to_known_features = C::KNOWN_FEATURE_MASK[i]; + flags.push(byte & from_known_features & to_known_features); } } Features:: { flags, mark: PhantomData, } @@ -550,21 +547,6 @@ impl Features { pub(crate) fn byte_count(&self) -> usize { self.flags.len() } - - #[cfg(test)] - pub(crate) fn set_required_unknown_bits(&mut self) { - ::set_required_bit(&mut self.flags); - } - - #[cfg(test)] - pub(crate) fn set_optional_unknown_bits(&mut self) { - ::set_optional_bit(&mut self.flags); - } - - #[cfg(test)] - pub(crate) fn clear_unknown_bits(&mut self) { - ::clear_bits(&mut self.flags); - } } impl Features { @@ -646,11 +628,8 @@ impl Features { pub(crate) fn requires_payment_secret(&self) -> bool { ::requires_feature(&self.flags) } - // Note that we never need to test this since what really matters is the invoice - iff the - // invoice provides a payment_secret, we assume that we can use it (ie that the recipient - // supports payment_secret). - #[allow(dead_code)] - pub(crate) fn supports_payment_secret(&self) -> bool { + /// Returns whether the `payment_secret` feature is supported. + pub fn supports_payment_secret(&self) -> bool { ::supports_feature(&self.flags) } } @@ -730,8 +709,10 @@ mod tests { assert!(InitFeatures::known().supports_variable_length_onion()); assert!(NodeFeatures::known().supports_variable_length_onion()); + assert!(InvoiceFeatures::known().supports_variable_length_onion()); assert!(InitFeatures::known().requires_variable_length_onion()); assert!(NodeFeatures::known().requires_variable_length_onion()); + assert!(InvoiceFeatures::known().requires_variable_length_onion()); assert!(InitFeatures::known().supports_static_remote_key()); assert!(NodeFeatures::known().supports_static_remote_key()); @@ -740,13 +721,17 @@ mod tests { assert!(InitFeatures::known().supports_payment_secret()); assert!(NodeFeatures::known().supports_payment_secret()); + assert!(InvoiceFeatures::known().supports_payment_secret()); assert!(InitFeatures::known().requires_payment_secret()); assert!(NodeFeatures::known().requires_payment_secret()); + assert!(InvoiceFeatures::known().requires_payment_secret()); assert!(InitFeatures::known().supports_basic_mpp()); assert!(NodeFeatures::known().supports_basic_mpp()); + assert!(InvoiceFeatures::known().supports_basic_mpp()); assert!(!InitFeatures::known().requires_basic_mpp()); assert!(!NodeFeatures::known().requires_basic_mpp()); + assert!(!InvoiceFeatures::known().requires_basic_mpp()); assert!(InitFeatures::known().supports_shutdown_anysegwit()); assert!(NodeFeatures::known().supports_shutdown_anysegwit()); @@ -759,19 +744,15 @@ mod tests { #[test] fn sanity_test_unknown_bits() { - let mut features = ChannelFeatures::empty(); + let features = ChannelFeatures::empty(); assert!(!features.requires_unknown_bits()); assert!(!features.supports_unknown_bits()); - features.set_required_unknown_bits(); + let features = ChannelFeatures::empty().set_unknown_feature_required(); assert!(features.requires_unknown_bits()); assert!(features.supports_unknown_bits()); - features.clear_unknown_bits(); - assert!(!features.requires_unknown_bits()); - assert!(!features.supports_unknown_bits()); - - features.set_optional_unknown_bits(); + let features = ChannelFeatures::empty().set_unknown_feature_optional(); assert!(!features.requires_unknown_bits()); assert!(features.supports_unknown_bits()); } @@ -807,6 +788,16 @@ mod tests { assert!(!init_features.supports_gossip_queries()); } + #[test] + fn convert_to_context_with_unknown_flags() { + // Ensure the `from` context has fewer known feature bytes than the `to` context. + assert!(InvoiceFeatures::known().byte_count() < NodeFeatures::known().byte_count()); + let invoice_features = InvoiceFeatures::known().set_unknown_feature_optional(); + assert!(invoice_features.supports_unknown_bits()); + let node_features: NodeFeatures = invoice_features.to_context(); + assert!(!node_features.supports_unknown_bits()); + } + #[test] fn set_feature_bits() { let features = InvoiceFeatures::empty()