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lnwallet: add support for taproot chans to createHtlcRetribution

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As these are revoked HTLCs, we need to set the taptweak since the
revocation case is just a keyspend.
This commit is contained in:
Olaoluwa Osuntokun 2023-03-01 21:44:47 -08:00
parent 52b122a8bb
commit 1f887a1b14
No known key found for this signature in database
GPG Key ID: 3BBD59E99B280306
1 changed files with 23 additions and 11 deletions
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34
lnwallet/channel.go
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@ -2583,18 +2583,30 @@ func createHtlcRetribution(chanState *channeldb.OpenChannel,
return emptyRetribution, err
}
return HtlcRetribution{
SignDesc: input.SignDescriptor{
KeyDesc: chanState.LocalChanCfg.
RevocationBasePoint,
DoubleTweak: commitmentSecret,
WitnessScript: scriptInfo.WitnessScript,
Output: &wire.TxOut{
PkScript: scriptInfo.PkScript,
Value: int64(htlc.Amt),
},
HashType: txscript.SigHashAll,
signDesc := input.SignDescriptor{
KeyDesc: chanState.LocalChanCfg.
RevocationBasePoint,
DoubleTweak: commitmentSecret,
WitnessScript: scriptInfo.WitnessScript,
Output: &wire.TxOut{
PkScript: scriptInfo.PkScript,
Value: int64(htlc.Amt),
},
HashType: txscript.SigHashAll,
}
// For taproot HTLC outputs, we need to set the sign method to key
// spend, and also set the tap tweak root needed to derive the proper
// private key.
if chanState.ChanType.IsTaproot() {
signDesc.SignMethod = input.TaprootKeySpendSignMethod
tapscriptRoot := scriptInfo.ScriptTree.RootNode.TapHash()
signDesc.TapTweak = tapscriptRoot[:]
}
return HtlcRetribution{
SignDesc: signDesc,
OutPoint: wire.OutPoint{
Hash: commitHash,
Index: uint32(htlc.OutputIndex),