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dump: include close tx, commit sig, commit height
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That will add the new data to the output of chantools dumpbackup.
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guggero authored and starius committed Sep 20, 2024
1 parent 0c4445e commit 9474fe1
Showing 1 changed file with 43 additions and 0 deletions.
43 changes: 43 additions & 0 deletions dump/dump.go
Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,16 @@ type BackupSingle struct {
LocalChanCfg ChannelConfig
RemoteChanCfg ChannelConfig
ShaChainRootDesc KeyDescriptor
CloseTxInputs *CloseTxInputs
}

// CloseTxInputs is a struct that contains data needed to produce a force close
// transaction from a channel backup as a last resort recovery method.
type CloseTxInputs struct {
CommitTx string
CommitSig string
CommitHeight uint64
TapscriptRoot string
}

// OpenChannel is the information we want to dump from an open channel in lnd's
Expand Down Expand Up @@ -406,7 +416,40 @@ func BackupDump(multi *chanbackup.Multi,
params, single.ShaChainRootDesc,
),
}

single.CloseTxInputs.WhenSome(
func(inputs chanbackup.CloseTxInputs) {
// Serialize unsigned transaction.
var buf bytes.Buffer
err := inputs.CommitTx.Serialize(&buf)
if err != nil {
buf.WriteString("error serializing " +
"commit tx: " + err.Error())
}
tx := buf.Bytes()

// Serialize TapscriptRoot if present.
var tapscriptRoot string
inputs.TapscriptRoot.WhenSome(
func(tr chainhash.Hash) {
tapscriptRoot = tr.String()
},
)

// Put all CloseTxInputs to dump in human
// readable form.
dumpSingles[idx].CloseTxInputs = &CloseTxInputs{
CommitTx: hex.EncodeToString(tx),
CommitSig: hex.EncodeToString(
inputs.CommitSig,
),
CommitHeight: inputs.CommitHeight,
TapscriptRoot: tapscriptRoot,
}
},
)
}

return dumpSingles
}

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