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lnwire+feature: new zero-conf, scid-alias feature bit + chantypes

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This defines the zero-conf feature bit, the scid-alias feature bit,
the zero-conf channel type, and the scid-alias channel type. It also
defines the dependency "tree" that exists for the feature bits.

The scid-alias feature bit signals that the node requires an alias
short channel id to be sent in funding_locked. The scid-alias channel
type requires that the channel is private, in addition to some other
forwarding-related privacy measures.
This commit is contained in:
eugene
2022-04-04 15:16:13 -04:00
parent dc35f78ebc
commit a6c62eb71e
4 changed files with 54 additions and 1 deletions
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24
lnwire/features.go
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@@ -155,6 +155,16 @@ const (
// TODO: Decide on actual feature bit value.
ExplicitChannelTypeOptional = 45
// ScidAliasRequired is a required feature bit that signals that the
// node requires understanding of ShortChannelID aliases in the TLV
// segment of the funding_locked message.
ScidAliasRequired FeatureBit = 46
// ScidAliasOptional is an optional feature bit that signals that the
// node understands ShortChannelID aliases in the TLV segment of the
// funding_locked message.
ScidAliasOptional FeatureBit = 47
// PaymentMetadataRequired is a required bit that denotes that if an
// invoice contains metadata, it must be passed along with the payment
// htlc(s).
@@ -165,6 +175,14 @@ const (
// htlc(s).
PaymentMetadataOptional = 49
// ZeroConfRequired is a required feature bit that signals that the
// node requires understanding of the zero-conf channel_type.
ZeroConfRequired FeatureBit = 50
// ZeroConfOptional is an optional feature bit that signals that the
// node understands the zero-conf channel type.
ZeroConfOptional FeatureBit = 51
// KeysendRequired is a required bit that indicates that the node is
// able and willing to accept keysend payments.
KeysendRequired = 54
@@ -173,7 +191,7 @@ const (
// able and willing to accept keysend payments.
KeysendOptional = 55
// ScriptEnforcedLeaseRequired is a required feature bit that signals
// ScriptEnforcedLeaseOptional is an optional feature bit that signals
// that the node requires channels having zero-fee second-level HTLC
// transactions, which also imply anchor commitments, along with an
// additional CLTV constraint of a channel lease's expiration height
@@ -244,6 +262,10 @@ var Features = map[FeatureBit]string{
KeysendRequired: "keysend",
ScriptEnforcedLeaseRequired: "script-enforced-lease",
ScriptEnforcedLeaseOptional: "script-enforced-lease",
ScidAliasRequired: "scid-alias",
ScidAliasOptional: "scid-alias",
ZeroConfRequired: "zero-conf",
ZeroConfOptional: "zero-conf",
}
// RawFeatureVector represents a set of feature bits as defined in BOLT-09. A