Commit Graph

33 Commits

Author SHA1 Message Date
Conner Fromknecht
c1b9b272cd
input/size: assert witness size constants
This commit introduces a new test case that asserts all of the witness
size constants currently in the codebase. We also reintroduce the
AcceptedHtlcSuccessWitnessSize and OfferedHtlcTimeoutWitnessSize
constants that were recently removed for the sake of completeness.

In asserting the witnes sizes, there were three uncovered discrepancies:
 * OfferedHtlcSuccessWitnessSize overestimated by about 30% because it
   included an extra signature in the calculation.

 * ToLocalPenaltyWitnessSize was underestimated by one byte, because it
   was missing the length byte for the OP_TRUE. This has implications
   the watchtower protocol since the client and server are assumed to
   share the same weight estimates used for signing. This commit keeps
   the current behavior, with the intention of rolling out negotiation
   for which weight estimate to use for a given session.

 * AcceptedHtlcScriptSize was underestimated by one byte because it was
   missing a length byte for the value 32 pushed on the stack when
   asserting the preimage's length. This affects all AcceptedHtlc*
   witness sizes.
2020-04-10 15:34:27 -07:00
Conner Fromknecht
f2b6e2af04
input: pass input.Signature to multisig spend
Modifies SpendMultiSig to accept input.Signature, so that we can
ultimately assert the size of multisig witnesses.
2020-04-10 14:27:35 -07:00
Conner Fromknecht
0f94b8dc62
multi: return input.Signature from SignOutputRaw 2020-04-10 14:27:35 -07:00
Conner Fromknecht
37dffb225a
input: introduce Signature iface
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.
2020-04-09 12:49:11 -07:00
Joost Jager
c376cdb733
input: add anchor witness type 2020-03-17 16:25:35 +01:00
Olaoluwa Osuntokun
113c5c2054
Merge pull request #4062 from cfromknecht/size-typo
input/size: correct NestedP2WSHSize comment
2020-03-10 17:40:44 -07:00
Conner Fromknecht
ae815f221f
input/size: correct NestedP2WSHSize comment 2020-03-10 11:53:58 -07:00
Olaoluwa Osuntokun
3dda93e30d
Merge pull request #3821 from halseth/pluggable-anchors-lnwallet
[anchor] pluggable anchor commitments
2020-03-09 19:49:05 -07:00
Johan T. Halseth
b7885dbbae
lnwallet+size: select HTLC fees based on channel type 2020-03-09 12:59:35 +01:00
Johan T. Halseth
92af2342da
lnwallet+nursery+input: set sequence=1 for direct HTLC spends 2020-03-09 12:59:33 +01:00
Johan T. Halseth
bddd3e128c
lnwallet: make second level sigs using sighash single|anyonecanpay 2020-03-09 12:59:33 +01:00
Johan T. Halseth
d1089fb449
input/test_utils: make mockSigner use SigHashType from sign descriptor 2020-03-09 12:59:33 +01:00
Johan T. Halseth
ea94dbbe34
input+lnwallet: use individual commit weight calculations for channel type
Based on the channel type, the commitment weight will be calculated.
2020-03-09 12:10:59 +01:00
Johan T. Halseth
50199aeaf3
input/script_utils: add anchor scripts + tests 2020-03-09 12:10:59 +01:00
Johan T. Halseth
6deb913a8d
input: add CommitmentToRemoteConfirmed witness type 2020-03-09 12:10:59 +01:00
Johan T. Halseth
990992ce94
input/script_utils: add delayed to_remote script + tests 2020-03-09 12:10:59 +01:00
Johan T. Halseth
a309132253
input/script_utils test: add test cases for delayed HTLC receiver scrpts 2020-03-09 12:10:59 +01:00
Johan T. Halseth
dc271a80cb
input/script_utils test: add test cases for delayed HTLC sender script 2020-03-09 12:10:58 +01:00
Johan T. Halseth
8c0deb81c2
input+lnwallet: Add scripts for CSV delayed HTLC outputs
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.
2020-03-09 12:10:58 +01:00
Johan T. Halseth
b228681a02
input/script_utils_test: refactor TestHTLCSenderSpendValidation
To be able to change more than the witness used for each test case, we
extract commit and sweep tx generation into own methods that can be
called from each test case.

We do the same for TestHTLCReceiverSpendValidation
2020-03-09 12:10:58 +01:00
Johan T. Halseth
b56c7e308b
input/script_utils_test: extract script execution into assert method
This fixes an error case that wouldn't have been caught, since
vm.Execute applies more rules than the individual steps (most notably
the clean stack rule).

Instead we execute the engine as normal, and only step through if we
decide that the outcome is unexpected.
2020-03-09 12:10:58 +01:00
Johan T. Halseth
02dd8d23fd
input/size: remove unused constants
Since we never attempt to sweep an HTLC we offered with the preimage on
the remote's commitment, we never use the constant
AcceptedHtlcSuccessWitnessSize for weight estimation. Similarly, we
never timout an HTLC offered by the remote on our own commitment, and
don't need the constant OfferedHtlcTimeoutWitnessSize.
2020-03-09 12:10:57 +01:00
Conner Fromknecht
4c2bc7bc79
lnwallet+input: move size_test.go to input pkg 2020-03-04 08:01:37 -08:00
Conner Fromknecht
6eb7f2800d
input/size: correct NP2WKH and NP2SH input count
This commit corrects a bug in TxWeightEstimator that could result in
underestimations for transactions involving NestedP2WPKH and NestedP2WSH
inputs. The scriptSig data push is now accounted for in a proper size
constant, and the input count is now incremented in both. This would
only be detectable in the event that the number of non-nested inputs and
the total number of inputs straddle the discontinuities in the
CompactSize encoding, e.g. 253, 2^16-1, or 2^32-1.
2020-03-04 08:00:33 -08:00
Johan T. Halseth
3711597fef
input: remove duplicate commit weight constant 2020-01-06 12:08:25 +01:00
Johan T. Halseth
9b5809a884
input: update SignDescriptor doc to note only segwit is supported
Also update the WitnessScript doc to note it should be set also for
p2wkh.
2020-01-06 12:08:14 +01:00
Joost Jager
7e472c9e8c
input: add constructor for csv-locked inputs 2019-11-13 10:17:26 +01:00
Oliver Gugger
05096b0c2d
input+sweep: log input witness types instead of CSV/CLTV count 2019-10-23 17:09:31 +02:00
Oliver Gugger
fb0051a318
input+sweep: rework witness type into an interface 2019-10-14 15:32:54 +02:00
Olaoluwa Osuntokun
bee777ab5f
input: update CommitSpendNoDelay to be aware of tweakless commits, add new witness type
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.
2019-09-25 18:25:37 -07:00
AdamISZ
6e054886d8 Typo corrections in various comments 2019-05-10 17:15:54 +02:00
Conner Fromknecht
f1f52410ab
sweep/input: adds NewBaseInput to return reference 2019-02-05 18:27:07 -08:00
Joost Jager
9e012ecc93
multi: move Input interface and related code
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.
2019-01-31 13:25:33 +01:00