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htlcswitch: thread through packet's inbound wire records

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For calculating the available auxiliary bandwidth of a channel, we need
access to the inbound custom wire records of the HTLC packet, which
might contain auxiliary information about the worth of the HTLC packet
apart from the BTC value being transported.
This commit is contained in:
Oliver Gugger
2024-12-04 12:02:24 +01:00
parent 117c6bc781
commit a2e78c3984
5 changed files with 55 additions and 48 deletions
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20
htlcswitch/link.go
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@@ -3233,11 +3233,11 @@ func (l *channelLink) UpdateForwardingPolicy(
// issue.
//
// NOTE: Part of the ChannelLink interface.
func (l *channelLink) CheckHtlcForward(payHash [32]byte,
incomingHtlcAmt, amtToForward lnwire.MilliSatoshi,
incomingTimeout, outgoingTimeout uint32,
inboundFee models.InboundFee,
heightNow uint32, originalScid lnwire.ShortChannelID) *LinkError {
func (l *channelLink) CheckHtlcForward(payHash [32]byte, incomingHtlcAmt,
amtToForward lnwire.MilliSatoshi, incomingTimeout,
outgoingTimeout uint32, inboundFee models.InboundFee,
heightNow uint32, originalScid lnwire.ShortChannelID,
customRecords lnwire.CustomRecords) *LinkError {
l.RLock()
policy := l.cfg.FwrdingPolicy
@@ -3286,7 +3286,7 @@ func (l *channelLink) CheckHtlcForward(payHash [32]byte,
// Check whether the outgoing htlc satisfies the channel policy.
err := l.canSendHtlc(
policy, payHash, amtToForward, outgoingTimeout, heightNow,
originalScid,
originalScid, customRecords,
)
if err != nil {
return err
@@ -3322,8 +3322,8 @@ func (l *channelLink) CheckHtlcForward(payHash [32]byte,
// the violation. This call is intended to be used for locally initiated
// payments for which there is no corresponding incoming htlc.
func (l *channelLink) CheckHtlcTransit(payHash [32]byte,
amt lnwire.MilliSatoshi, timeout uint32,
heightNow uint32) *LinkError {
amt lnwire.MilliSatoshi, timeout uint32, heightNow uint32,
customRecords lnwire.CustomRecords) *LinkError {
l.RLock()
policy := l.cfg.FwrdingPolicy
@@ -3334,6 +3334,7 @@ func (l *channelLink) CheckHtlcTransit(payHash [32]byte,
// to occur.
return l.canSendHtlc(
policy, payHash, amt, timeout, heightNow, hop.Source,
customRecords,
)
}
@@ -3341,7 +3342,8 @@ func (l *channelLink) CheckHtlcTransit(payHash [32]byte,
// the channel's amount and time lock constraints.
func (l *channelLink) canSendHtlc(policy models.ForwardingPolicy,
payHash [32]byte, amt lnwire.MilliSatoshi, timeout uint32,
heightNow uint32, originalScid lnwire.ShortChannelID) *LinkError {
heightNow uint32, originalScid lnwire.ShortChannelID,
customRecords lnwire.CustomRecords) *LinkError {
// As our first sanity check, we'll ensure that the passed HTLC isn't
// too small for the next hop. If so, then we'll cancel the HTLC