]> git.bitcoin.ninja Git - rust-lightning/commitdiff
Define public getters for all feature flags
authorMatt Corallo <git@bluematt.me>
Fri, 23 Jul 2021 15:49:24 +0000 (15:49 +0000)
committerMatt Corallo <git@bluematt.me>
Tue, 30 Nov 2021 21:08:52 +0000 (21:08 +0000)
There's not a ton of reason not to do this, and moving it to the
macro removes some code.

lightning/src/ln/features.rs

index 32ba9de758632036942318c756f64708793e1b1a..07e1a3229443b312aceff86ae7cb270576257eba 100644 (file)
@@ -223,7 +223,7 @@ mod sealed {
        /// useful for manipulating feature flags.
        macro_rules! define_feature {
                ($odd_bit: expr, $feature: ident, [$($context: ty),+], $doc: expr, $optional_setter: ident,
-                $required_setter: ident) => {
+                $required_setter: ident, $supported_getter: ident) => {
                        #[doc = $doc]
                        ///
                        /// See [BOLT #9] for details.
@@ -320,6 +320,11 @@ mod sealed {
                                        <T as $feature>::set_required_bit(&mut self.flags);
                                        self
                                }
+
+                               /// Checks if this feature is supported.
+                               pub fn $supported_getter(&self) -> bool {
+                                       <T as $feature>::supports_feature(&self.flags)
+                               }
                        }
 
                        $(
@@ -331,41 +336,57 @@ mod sealed {
                                        const ASSERT_ODD_BIT_PARITY: usize = (<Self as $feature>::ODD_BIT % 2) - 1;
                                }
                        )*
-
+               };
+               ($odd_bit: expr, $feature: ident, [$($context: ty),+], $doc: expr, $optional_setter: ident,
+                $required_setter: ident, $supported_getter: ident, $required_getter: ident) => {
+                       define_feature!($odd_bit, $feature, [$($context),+], $doc, $optional_setter, $required_setter, $supported_getter);
+                       impl <T: $feature> Features<T> {
+                               /// Checks if this feature is required.
+                               pub fn $required_getter(&self) -> bool {
+                                       <T as $feature>::requires_feature(&self.flags)
+                               }
+                       }
                }
        }
 
        define_feature!(1, DataLossProtect, [InitContext, NodeContext],
                "Feature flags for `option_data_loss_protect`.", set_data_loss_protect_optional,
-               set_data_loss_protect_required);
+               set_data_loss_protect_required, supports_data_loss_protect, requires_data_loss_protect);
        // NOTE: Per Bolt #9, initial_routing_sync has no even bit.
        define_feature!(3, InitialRoutingSync, [InitContext], "Feature flags for `initial_routing_sync`.",
-               set_initial_routing_sync_optional, set_initial_routing_sync_required);
+               set_initial_routing_sync_optional, set_initial_routing_sync_required,
+               initial_routing_sync);
        define_feature!(5, UpfrontShutdownScript, [InitContext, NodeContext],
                "Feature flags for `option_upfront_shutdown_script`.", set_upfront_shutdown_script_optional,
-               set_upfront_shutdown_script_required);
+               set_upfront_shutdown_script_required, supports_upfront_shutdown_script,
+               requires_upfront_shutdown_script);
        define_feature!(7, GossipQueries, [InitContext, NodeContext],
-               "Feature flags for `gossip_queries`.", set_gossip_queries_optional, set_gossip_queries_required);
+               "Feature flags for `gossip_queries`.", set_gossip_queries_optional, set_gossip_queries_required,
+               supports_gossip_queries, requires_gossip_queries);
        define_feature!(9, VariableLengthOnion, [InitContext, NodeContext, InvoiceContext],
                "Feature flags for `var_onion_optin`.", set_variable_length_onion_optional,
-               set_variable_length_onion_required);
+               set_variable_length_onion_required, supports_variable_length_onion,
+               requires_variable_length_onion);
        define_feature!(13, StaticRemoteKey, [InitContext, NodeContext, ChannelTypeContext],
                "Feature flags for `option_static_remotekey`.", set_static_remote_key_optional,
-               set_static_remote_key_required);
+               set_static_remote_key_required, supports_static_remote_key, requires_static_remote_key);
        define_feature!(15, PaymentSecret, [InitContext, NodeContext, InvoiceContext],
-               "Feature flags for `payment_secret`.", set_payment_secret_optional, set_payment_secret_required);
+               "Feature flags for `payment_secret`.", set_payment_secret_optional, set_payment_secret_required,
+               supports_payment_secret, requires_payment_secret);
        define_feature!(17, BasicMPP, [InitContext, NodeContext, InvoiceContext],
-               "Feature flags for `basic_mpp`.", set_basic_mpp_optional, set_basic_mpp_required);
+               "Feature flags for `basic_mpp`.", set_basic_mpp_optional, set_basic_mpp_required,
+               supports_basic_mpp, requires_basic_mpp);
        define_feature!(27, ShutdownAnySegwit, [InitContext, NodeContext],
                "Feature flags for `opt_shutdown_anysegwit`.", set_shutdown_any_segwit_optional,
-               set_shutdown_any_segwit_required);
+               set_shutdown_any_segwit_required, supports_shutdown_anysegwit, requires_shutdown_anysegwit);
        define_feature!(55, Keysend, [NodeContext],
-               "Feature flags for keysend payments.", set_keysend_optional, set_keysend_required);
+               "Feature flags for keysend payments.", set_keysend_optional, set_keysend_required,
+               supports_keysend, requires_keysend);
 
        #[cfg(test)]
        define_feature!(123456789, UnknownFeature, [NodeContext, ChannelContext, InvoiceContext],
                "Feature flags for an unknown feature used in testing.", set_unknown_feature_optional,
-               set_unknown_feature_required);
+               set_unknown_feature_required, supports_unknown_test_feature, requires_unknown_test_feature);
 }
 
 /// Tracks the set of features which a node implements, templated by the context in which it
@@ -662,25 +683,7 @@ impl<T: sealed::Context> Features<T> {
        }
 }
 
-impl<T: sealed::DataLossProtect> Features<T> {
-       #[cfg(test)]
-       pub(crate) fn requires_data_loss_protect(&self) -> bool {
-               <T as sealed::DataLossProtect>::requires_feature(&self.flags)
-       }
-       #[cfg(test)]
-       pub(crate) fn supports_data_loss_protect(&self) -> bool {
-               <T as sealed::DataLossProtect>::supports_feature(&self.flags)
-       }
-}
-
 impl<T: sealed::UpfrontShutdownScript> Features<T> {
-       #[cfg(test)]
-       pub(crate) fn requires_upfront_shutdown_script(&self) -> bool {
-               <T as sealed::UpfrontShutdownScript>::requires_feature(&self.flags)
-       }
-       pub(crate) fn supports_upfront_shutdown_script(&self) -> bool {
-               <T as sealed::UpfrontShutdownScript>::supports_feature(&self.flags)
-       }
        #[cfg(test)]
        pub(crate) fn clear_upfront_shutdown_script(mut self) -> Self {
                <T as sealed::UpfrontShutdownScript>::clear_bits(&mut self.flags);
@@ -690,13 +693,6 @@ impl<T: sealed::UpfrontShutdownScript> Features<T> {
 
 
 impl<T: sealed::GossipQueries> Features<T> {
-       #[cfg(test)]
-       pub(crate) fn requires_gossip_queries(&self) -> bool {
-               <T as sealed::GossipQueries>::requires_feature(&self.flags)
-       }
-       pub(crate) fn supports_gossip_queries(&self) -> bool {
-               <T as sealed::GossipQueries>::supports_feature(&self.flags)
-       }
        #[cfg(test)]
        pub(crate) fn clear_gossip_queries(mut self) -> Self {
                <T as sealed::GossipQueries>::clear_bits(&mut self.flags);
@@ -704,30 +700,7 @@ impl<T: sealed::GossipQueries> Features<T> {
        }
 }
 
-impl<T: sealed::VariableLengthOnion> Features<T> {
-       #[cfg(test)]
-       pub(crate) fn requires_variable_length_onion(&self) -> bool {
-               <T as sealed::VariableLengthOnion>::requires_feature(&self.flags)
-       }
-       pub(crate) fn supports_variable_length_onion(&self) -> bool {
-               <T as sealed::VariableLengthOnion>::supports_feature(&self.flags)
-       }
-}
-
-impl<T: sealed::StaticRemoteKey> Features<T> {
-       pub(crate) fn supports_static_remote_key(&self) -> bool {
-               <T as sealed::StaticRemoteKey>::supports_feature(&self.flags)
-       }
-       #[cfg(test)]
-       pub(crate) fn requires_static_remote_key(&self) -> bool {
-               <T as sealed::StaticRemoteKey>::requires_feature(&self.flags)
-       }
-}
-
 impl<T: sealed::InitialRoutingSync> Features<T> {
-       pub(crate) fn initial_routing_sync(&self) -> bool {
-               <T as sealed::InitialRoutingSync>::supports_feature(&self.flags)
-       }
        // We are no longer setting initial_routing_sync now that gossip_queries
        // is enabled. This feature is ignored by a peer when gossip_queries has 
        // been negotiated.
@@ -737,32 +710,7 @@ impl<T: sealed::InitialRoutingSync> Features<T> {
        }
 }
 
-impl<T: sealed::PaymentSecret> Features<T> {
-       #[cfg(test)]
-       pub(crate) fn requires_payment_secret(&self) -> bool {
-               <T as sealed::PaymentSecret>::requires_feature(&self.flags)
-       }
-       /// Returns whether the `payment_secret` feature is supported.
-       pub fn supports_payment_secret(&self) -> bool {
-               <T as sealed::PaymentSecret>::supports_feature(&self.flags)
-       }
-}
-
-impl<T: sealed::BasicMPP> Features<T> {
-       #[cfg(test)]
-       pub(crate) fn requires_basic_mpp(&self) -> bool {
-               <T as sealed::BasicMPP>::requires_feature(&self.flags)
-       }
-       // We currently never test for this since we don't actually *generate* multipath routes.
-       pub(crate) fn supports_basic_mpp(&self) -> bool {
-               <T as sealed::BasicMPP>::supports_feature(&self.flags)
-       }
-}
-
 impl<T: sealed::ShutdownAnySegwit> Features<T> {
-       pub(crate) fn supports_shutdown_anysegwit(&self) -> bool {
-               <T as sealed::ShutdownAnySegwit>::supports_feature(&self.flags)
-       }
        #[cfg(test)]
        pub(crate) fn clear_shutdown_anysegwit(mut self) -> Self {
                <T as sealed::ShutdownAnySegwit>::clear_bits(&mut self.flags);