The field is optional. It stores inputs needed to produce signed commit tx using
chantools scbforceclose, which calls function GetSignedCommitTx. New backups
have this field filled if commit tx is available (for all cases except when DLP
is active). If a backup has this data, the field is filled from it, otherwise it
is kept empty.
Modified test function genRandomOpenChannelShell to cover new types of channels
(simple taproot channel and custom channel) and to cover combinations of bits.
Make sure that TapscriptRoot field is properly packed and unpacked.
Previous to this change taproot assets channels and simple taproot channels were
considered the same in the context of chanbackup package, since they stored the
same data. In the following commits we are adding the data needed to produce a
signed commitment transaction from a SCB file and in order to do that we need to
add more fields and a custom channel gets one additional field (TapscriptRoot)
compared to a simple taproot channel. So now we have to distinguish these kinds
of channels in chanbackup package.
See PR https://github.com/lightningnetwork/lnd/pull/8183 for more details.
This pure function creates signed commit transaction, using various
inputs passed as struct TaprootSignedCommitTxInputs and a signer.
This is needed to be able to store the inputs without a signature
in SCB and sign the transaction in chantools scbforceclose.
See https://github.com/lightningnetwork/lnd/pull/8183/files#r1423959791
fix the signature of the Encode method so that it does in fact implement
the Serializable interface defined in the lnwire21 package. This differs
slightly from the interface defined in the main lnwire package.
Similar to the sweeper, when we're about to make a new breach
transaction, we ask the sweeper for a new change address, if it has one.
Then when we go to publish, we notify broadcast.
In this commit, we start to use the AuxSweeper (if present) to obtain a
new extra change addr we should add to the sweeping transaction. With
this, we'll take the set of inputs and our change addr, and then maybe
gain a new change addr to add to the sweep transaction.
The extra change addr will be treated as an extra required tx out,
shared across all the relevant inputs. This'll also be used in
NeedWalletInput to make sure that we add an extra input if needed to be
able to pay for the change addr.
In this commit, we add a new AuxSweeper interface. This'll take a set of
inputs, and a change addr for the sweep transaction, then optionally
return a new sweep output to be added to the sweep transaction.
We also add a new NotifyBroadcast method. This'll be used to notify
that we're _about_ to broadcast a sweeping transaction. The set of
inputs is passed in, which allows the caller to prepare for the ultimate
broadcast of the sweeping transaction.
We also add ExtraTxOut to BumpRequest pass fees to NotifyBroadcast. This
allows the callee to know the total fee of the sweeping transaction.
In this commit, we refactor all the other constructors for the input to
use MakeBaseInput. We also add a new set of functional options as well.
This'll be useful later on to ensure that new options are properly
applied to all the input types.
This will be used by external callers to modify the way we resolve
contracts on chain. For a given contract, we'll store an extra "blob",
that will later be presented during the sweeping phase.
