//! (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
+// 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
//! (see [BOLT-2](https://github.com/lightning/bolts/blob/master/02-peer-protocol.md) for more information).
+//! - `PaymentMetadata` - include additional data in invoices which is passed to recipients in the
+//! onion.
+//! (see [BOLT-11](https://github.com/lightning/bolts/blob/master/11-payment-encoding.md) for
+//! more).
+//! - `ZeroConf` - supports accepting HTLCs and using channels prior to funding confirmation
+//! (see
+//! [BOLT-2](https://github.com/lightning/bolts/blob/master/02-peer-protocol.md#the-channel_ready-message)
+//! for more info).
//! - `Keysend` - send funds to a node without an invoice
//! (see the [`Keysend` feature assignment proposal](https://github.com/lightning/bolts/issues/605#issuecomment-606679798) for more information).
//! - `AnchorsZeroFeeHtlcTx` - requires/supports that commitment transactions include anchor outputs
-//! and HTLC transactions are pre-signed with zero fee (see
-//! [BOLT-3](https://github.com/lightning/bolts/blob/master/03-transactions.md) for more
-//! information).
+//! and HTLC transactions are pre-signed with zero fee (see
+//! [BOLT-3](https://github.com/lightning/bolts/blob/master/03-transactions.md) for more
+//! information).
//!
//! [BOLT #9]: https://github.com/lightning/bolts/blob/master/09-features.md
//! [messages]: crate::ln::msgs
VariableLengthOnion | PaymentSecret,
// Byte 2
BasicMPP,
+ // Byte 3
+ ,
+ // Byte 4
+ ,
+ // Byte 5
+ ,
+ // Byte 6
+ PaymentMetadata,
]);
define_context!(OfferContext, []);
define_context!(InvoiceRequestContext, []);
}
flags[Self::BYTE_OFFSET] |= Self::REQUIRED_MASK;
+ flags[Self::BYTE_OFFSET] &= !Self::OPTIONAL_MASK;
}
/// Sets the feature's optional (odd) bit in the given flags.
define_feature!(47, SCIDPrivacy, [InitContext, NodeContext, ChannelTypeContext],
"Feature flags for only forwarding with SCID aliasing. Called `option_scid_alias` in the BOLTs",
set_scid_privacy_optional, set_scid_privacy_required, supports_scid_privacy, requires_scid_privacy);
+ define_feature!(49, PaymentMetadata, [InvoiceContext],
+ "Feature flags for payment metadata in invoices.", set_payment_metadata_optional,
+ set_payment_metadata_required, supports_payment_metadata, requires_payment_metadata);
define_feature!(51, ZeroConf, [InitContext, NodeContext, ChannelTypeContext],
"Feature flags for accepting channels with zero confirmations. Called `option_zeroconf` in the BOLTs",
set_zero_conf_optional, set_zero_conf_required, supports_zero_conf, requires_zero_conf);
define_feature!(55, Keysend, [NodeContext],
"Feature flags for keysend payments.", set_keysend_optional, set_keysend_required,
supports_keysend, requires_keysend);
+ // Note: update the module-level docs when a new feature bit is added!
#[cfg(test)]
define_feature!(123456789, UnknownFeature,
/// Tracks the set of features which a node implements, templated by the context in which it
/// appears.
///
-/// (C-not exported) as we map the concrete feature types below directly instead
+/// This is not exported to bindings users as we map the concrete feature types below directly instead
#[derive(Eq)]
pub struct Features<T: sealed::Context> {
/// Note that, for convenience, flags is LITTLE endian (despite being big-endian on the wire)
/// Create a Features given a set of flags, in little-endian. This is in reverse byte order from
/// most on-the-wire encodings.
- /// (C-not exported) as we don't support export across multiple T
+ ///
+ /// This is not exported to bindings users as we don't support export across multiple T
pub fn from_le_bytes(flags: Vec<u8>) -> Features<T> {
Features {
flags,
// Set a bunch of features we use, plus initial_routing_sync_required (which shouldn't get
// converted as it's only relevant in an init context).
init_features.set_initial_routing_sync_required();
- init_features.set_data_loss_protect_optional();
+ init_features.set_data_loss_protect_required();
init_features.set_variable_length_onion_required();
init_features.set_static_remote_key_required();
init_features.set_payment_secret_required();
let node_features: NodeFeatures = init_features.to_context();
{
// Check that the flags are as expected:
- // - option_data_loss_protect
+ // - option_data_loss_protect (req)
// - var_onion_optin (req) | static_remote_key (req) | payment_secret(req)
// - basic_mpp | wumbo
// - opt_shutdown_anysegwit
// - option_channel_type | option_scid_alias
// - option_zeroconf
assert_eq!(node_features.flags.len(), 7);
- assert_eq!(node_features.flags[0], 0b00000010);
+ assert_eq!(node_features.flags[0], 0b00000001);
assert_eq!(node_features.flags[1], 0b01010001);
assert_eq!(node_features.flags[2], 0b10001010);
assert_eq!(node_features.flags[3], 0b00001000);
#[test]
fn convert_to_context_with_unknown_flags() {
// Ensure the `from` context has fewer known feature bytes than the `to` context.
- assert!(<sealed::InvoiceContext as sealed::Context>::KNOWN_FEATURE_MASK.len() <
- <sealed::NodeContext as sealed::Context>::KNOWN_FEATURE_MASK.len());
- let mut invoice_features = InvoiceFeatures::empty();
- invoice_features.set_unknown_feature_optional();
- assert!(invoice_features.supports_unknown_bits());
- let node_features: NodeFeatures = invoice_features.to_context();
- assert!(!node_features.supports_unknown_bits());
+ assert!(<sealed::ChannelContext as sealed::Context>::KNOWN_FEATURE_MASK.len() <
+ <sealed::InvoiceContext as sealed::Context>::KNOWN_FEATURE_MASK.len());
+ let mut channel_features = ChannelFeatures::empty();
+ channel_features.set_unknown_feature_optional();
+ assert!(channel_features.supports_unknown_bits());
+ let invoice_features: InvoiceFeatures = channel_features.to_context_internal();
+ assert!(!invoice_features.supports_unknown_bits());
}
#[test]
projects / rust-lightning / blobdiff