akovalenko/lnd.xprv
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

htlcswitch+lnwallet+peer: default max htlc in fwding policy of new chans

Browse Source 
In this commit, we set a default max HTLC in the forwarding
policies of newly open channels.

The ForwardingPolicy's MaxHTLC field (added in this commit)
will later be used to decide whether an HTLC satisfies our policy before
forwarding it.

To ensure the ForwardingPolicy's MaxHTLC default matches the max HTLC
advertised in the ChannelUpdate sent out for this channel,  we also add
a MaxPendingAmount() function to the lnwallet.Channel.
This commit is contained in:
Valentine Wallace 2018-12-07 18:39:34 -08:00
parent cbe0bf6a22
commit 20b3114100
3 changed files with 16 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
htlcswitch/link.go
View File

@ -71,6 +71,9 @@ type ForwardingPolicy struct {
// lifetime of the channel.
MinHTLC lnwire.MilliSatoshi
// MaxHTLC is the largest HTLC that is to be forwarded.
MaxHTLC lnwire.MilliSatoshi
// BaseFee is the base fee, expressed in milli-satoshi that must be
// paid for each incoming HTLC. This field, combined with FeeRate is
// used to compute the required fee for a given HTLC.

6
lnwallet/channel.go
View File

@ -6336,3 +6336,9 @@ func (lc *LightningChannel) RemoteCommitHeight() uint64 {
func (lc *LightningChannel) FwdMinHtlc() lnwire.MilliSatoshi {
return lc.localChanCfg.MinHTLC
}
// MaxPendingAmount returns the maximum HTLC value that can be pending at
// any time over this channel.
func (lc *LightningChannel) MaxPendingAmount() lnwire.MilliSatoshi {
return lc.localChanCfg.MaxPendingAmount
}

12
peer.go
View File

@ -1670,15 +1670,17 @@ out:
continue
}
// We'll query the localChanCfg of the new channel to
// determine the minimum HTLC value that can be
// forwarded. For fees we'll use the default values, as
// they currently are always set to the default values
// at initial channel creation.
// We'll query the localChanCfg of the new channel to determine the
// minimum HTLC value that can be forwarded. For the maximum HTLC
// value that can be forwarded and fees we'll use the default
// values, as they currently are always set to the default values
// at initial channel creation. Note that the maximum HTLC value
// defaults to the cap on the total value of outstanding HTLCs.
fwdMinHtlc := lnChan.FwdMinHtlc()
defaultPolicy := p.server.cc.routingPolicy
forwardingPolicy := &htlcswitch.ForwardingPolicy{
MinHTLC: fwdMinHtlc,
MaxHTLC: lnChan.MaxPendingAmount(),
BaseFee: defaultPolicy.BaseFee,
FeeRate: defaultPolicy.FeeRate,
TimeLockDelta: defaultPolicy.TimeLockDelta,