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utxonursery: add new absoluteMaturity field to kid outputs

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This new field is reserved for outgoing HTLC outputs on the commitment
transaction of the remote party. These outputs don’t have a CSV delay,
but instead have an absolute maturity time.
This commit is contained in:
Olaoluwa Osuntokun 2018-01-16 20:44:50 -08:00
parent eeb6ab0b17
commit 13b5019cc6
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GPG Key ID: 964EA263DD637C21
1 changed files with 49 additions and 4 deletions
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53
utxonursery.go
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@ -1546,22 +1546,49 @@ type kidOutput struct {
originChanPoint wire.OutPoint
// TODO(roasbeef): using block timeouts everywhere currently, will need
// to modify logic later to account for MTP based timeouts.
// isHtlc denotes if this kid output is an HTLC output or not. This
// value will be used to determine how to report this output within the
// nursery report.
isHtlc bool
// blocksToMaturity is the relative CSV delay required after initial
// confirmation of the commitment transaction before we can sweep this
// output.
//
// NOTE: This will be set for: commitment outputs, and incoming HTLC's.
// Otherwise, this will be zero.
blocksToMaturity uint32
confHeight uint32
// absoluteMaturity is the absolute height that this output will be
// mature at. In order to sweep the output after this height, the
// locktime of sweep transaction will need to be set to this value.
//
// NOTE: This will only be set for: outgoing HTLC's on the commitment
// transaction of the remote party.
absoluteMaturity uint32
confHeight uint32
}
func makeKidOutput(outpoint, originChanPoint *wire.OutPoint,
blocksToMaturity uint32, witnessType lnwallet.WitnessType,
signDescriptor *lnwallet.SignDescriptor) kidOutput {
signDescriptor *lnwallet.SignDescriptor,
absoluteMaturity uint32) kidOutput {
// This is an HTLC either if it's an incoming HTLC on our commitment
// transaction, or is an outgoing HTLC on the commitment transaction of
// the remote peer.
isHtlc := (witnessType == lnwallet.HtlcAcceptedSuccessSecondLevel ||
witnessType == lnwallet.HtlcOfferedRemoteTimeout)
return kidOutput{
breachedOutput: makeBreachedOutput(
outpoint, witnessType, signDescriptor,
),
isHtlc: isHtlc,
originChanPoint: *originChanPoint,
blocksToMaturity: blocksToMaturity,
absoluteMaturity: absoluteMaturity,
}
}
@ -1599,11 +1626,20 @@ func (k *kidOutput) Encode(w io.Writer) error {
return err
}
if err := binary.Write(w, byteOrder, k.isHtlc); err != nil {
return err
}
byteOrder.PutUint32(scratch[:4], k.BlocksToMaturity())
if _, err := w.Write(scratch[:4]); err != nil {
return err
}
byteOrder.PutUint32(scratch[:4], k.absoluteMaturity)
if _, err := w.Write(scratch[:4]); err != nil {
return err
}
byteOrder.PutUint32(scratch[:4], k.ConfHeight())
if _, err := w.Write(scratch[:4]); err != nil {
return err
@ -1637,11 +1673,20 @@ func (k *kidOutput) Decode(r io.Reader) error {
return err
}
if err := binary.Read(r, byteOrder, &k.isHtlc); err != nil {
return err
}
if _, err := r.Read(scratch[:4]); err != nil {
return err
}
k.blocksToMaturity = byteOrder.Uint32(scratch[:4])
if _, err := r.Read(scratch[:4]); err != nil {
return err
}
k.absoluteMaturity = byteOrder.Uint32(scratch[:4])
if _, err := r.Read(scratch[:4]); err != nil {
return err
}