In this commit, we add awareness of the option_shutdown_anysegwit that
permits both sides to send newer segwit based addresses. This'll
eventually enable us to send taproot addresses for co-op close.
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.
If these bits are present, then both sides can examine the new
CommitmentType TLV field that's present and use this in place of the
existing implicit commiment type negotiation. With this change, it's now
possible to actually deprecate old unsupported commitment types
properly.
In this commit, we move to start requiring the payment addr feature bit
in the invoices we produce. With this change, if a user attempts to pay
one of our invoices (assuming they're also an lnd node), then they'll
receive an error when they attempt to pay. At this point, *most* lnd
nodes should be on v0.11 at this point, and this change will notify any
lagging wallet authors to update, as these payments are generally more
secure.
It's been sometime since we introduced this new safety enhancing feature
bit. At this point, we're now moving to require it as it makes our SCB
recovery system more robust, and it's also an implicit feature bit for
for anchor commitments as they're defined now.
This commit introduces a feature.Manager, which derives feature vectors
for various contexts within the daemon. The sets can be described via a
staticly compiled format, which makes any runtime adjustments to the
feature sets when the manager is initialized.
