Unlike the old HTLC scripts, we now need to handle the various control
block interactions. As is, we opt to simply re-compute the entire tree
when needed, as the tree only has two leaves.
In this commit, we add GenTaprootFundingScript, which'll return the
taproot pkScript and output for a taproot+musig2 channel. This uses
musig2 key aggregation with sorting activated.
The final key produced uses a bip86 tweak, meaning that the output key
provably doesn't commit to any script path. In the future, we may want
to permit this, as then it allows for a greater degree of
programmability of the funding output.
The default allocation of 500 bytes for the script that is
used in NewScriptBuilder is way too much for most of our scripts.
With the new functional option we can tune the allocation to exactly
what we need.
Because the original dcrec secp256k1 library that is used for the
Schnorr signature primitives uses different hash algorithms than the
btcd secp256k1 library. Therefore pulling in the wrong library can lead
to weird and unexpected errors. We try to make it harder to make the
mistake by not using the library directly in lnd in the first place.
Note that it is still indirectly needed by the btcd secp256k1 library,
therefore the module dependency is still expected to be there, just
moved to the indirect section.
This commit was previously split into the following parts to ease
review:
- 2d746f68: replace imports
- 4008f0fd: use ecdsa.Signature
- 849e33d1: remove btcec.S256()
- b8f6ebbd: use v2 library correctly
- fa80bca9: bump go modules
The new commitment type consists of adding an additional CLTV
requirement to guarantee a leased channel's expiration on any commitment
and HTLC outputs that pay directly to the channel initiator.
This commit updates call-sites to use the proper dust limits for
various script types. This also updates the default dust limit used
in the funding flow to be 354 satoshis instead of 573 satoshis.
This commit introduces the Signature interface which will be used by our
witness construction methods instead of passing in raw byte slices. This
will be used later to inject various kinds of mock signatures, e.g.
73-byte signatures for simulating worst-case witness weight.
We also increase the witness size for these types to account for the 3
extra bytes. The size won't be correct in all cases, but it is just an
upper bound in any case.
In this commit, we update the `CommitSpendNoDelay` method to be aware of
the alternate spending mechanism for commitments that don't have a tweak
for the remote party's non-delay output. We also add a new witness type
so callers can convey their expected signing path.
This commit is a step to split the lnwallet package. It puts the Input
interface and implementations in a separate package along with all their
dependencies from lnwallet.
