-/// The context in which a Feature object appears determines which bits of features the node
-/// supports will be set. We use this when creating our own Feature objects to select which bits to
-/// set and when passing around Feature objects to ensure the bits we're checking for are
-/// available.
-///
-/// This Context represents when the Feature appears in the init message, sent between peers and not
-/// rumored around the P2P network.
-pub struct FeatureContextInit {}
-/// The context in which a Feature object appears determines which bits of features the node
-/// supports will be set. We use this when creating our own Feature objects to select which bits to
-/// set and when passing around Feature objects to ensure the bits we're checking for are
-/// available.
-///
-/// This Context represents when the Feature appears in the node_announcement message, as it is
-/// rumored around the P2P network.
-pub struct FeatureContextNode {}
-/// The context in which a Feature object appears determines which bits of features the node
-/// supports will be set. We use this when creating our own Feature objects to select which bits to
-/// set and when passing around Feature objects to ensure the bits we're checking for are
-/// available.
-///
-/// This Context represents when the Feature appears in the ChannelAnnouncement message, as it is
-/// rumored around the P2P network.
-pub struct FeatureContextChannel {}
-/// The context in which a Feature object appears determines which bits of features the node
-/// supports will be set. We use this when creating our own Feature objects to select which bits to
-/// set and when passing around Feature objects to ensure the bits we're checking for are
-/// available.
-///
-/// This Context represents when the Feature appears in an invoice, used to determine the different
-/// options available for routing a payment.
-///
-/// Note that this is currently unused as invoices come to us via a different crate and are not
-/// native to rust-lightning directly.
-pub struct FeatureContextInvoice {}
-
-/// An internal trait capturing the various future context types
-pub trait FeatureContext {}
-impl FeatureContext for FeatureContextInit {}
-impl FeatureContext for FeatureContextNode {}
-impl FeatureContext for FeatureContextChannel {}
-impl FeatureContext for FeatureContextInvoice {}
-
-/// An internal trait capturing FeatureContextInit and FeatureContextNode
-pub trait FeatureContextInitNode : FeatureContext {}
-impl FeatureContextInitNode for FeatureContextInit {}
-impl FeatureContextInitNode for FeatureContextNode {}
+mod sealed { // You should just use the type aliases instead.
+ pub struct InitContext {}
+ pub struct NodeContext {}
+ pub struct ChannelContext {}
+
+ /// An internal trait capturing the various feature context types
+ pub trait Context {}
+ impl Context for InitContext {}
+ impl Context for NodeContext {}
+ impl Context for ChannelContext {}
+
+ pub trait DataLossProtect: Context {}
+ impl DataLossProtect for InitContext {}
+ impl DataLossProtect for NodeContext {}
+
+ pub trait InitialRoutingSync: Context {}
+ impl InitialRoutingSync for InitContext {}
+
+ pub trait UpfrontShutdownScript: Context {}
+ impl UpfrontShutdownScript for InitContext {}
+ impl UpfrontShutdownScript for NodeContext {}
+
+ pub trait VariableLengthOnion: Context {}
+ impl VariableLengthOnion for InitContext {}
+ impl VariableLengthOnion for NodeContext {}
+}