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Revert "funding+lnwallet: ensure max_htlc_value_in_flight smaller than capacity"

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This reverts commit 4aa52d267f.

It turns out that the other implementations set values for this field
which aren't based on the actual capacity of the channel. As a result,
we'll no reject most of their channel offerings, since they may offer a
value of a max `uint64` or something else hard coded that's above the
size of the channel. As a result, we're reverting this check for now to
maintain proper compatibility.
This commit is contained in:
Olaoluwa Osuntokun 2019-01-29 17:56:28 -08:00
parent fd1bbe63cf
commit b220c47ce7
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GPG key ID: CE58F7F8E20FD9A2
4 changed files with 8 additions and 38 deletions
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6
fundingmanager.go
View file

@ -1090,7 +1090,7 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
MaxAcceptedHtlcs: msg.MaxAcceptedHTLCs,
CsvDelay: msg.CsvDelay,
}
err = reservation.CommitConstraints(channelConstraints, amt)
err = reservation.CommitConstraints(channelConstraints)
if err != nil {
fndgLog.Errorf("Unacceptable channel constraints: %v", err)
f.failFundingFlow(fmsg.peer, fmsg.msg.PendingChannelID, err)
@ -1254,9 +1254,7 @@ func (f *fundingManager) handleFundingAccept(fmsg *fundingAcceptMsg) {
MaxAcceptedHtlcs: msg.MaxAcceptedHTLCs,
CsvDelay: msg.CsvDelay,
}
err = resCtx.reservation.CommitConstraints(
channelConstraints, resCtx.chanAmt,
)
err = resCtx.reservation.CommitConstraints(channelConstraints)
if err != nil {
fndgLog.Warnf("Unacceptable channel constraints: %v", err)
f.failFundingFlow(fmsg.peer, fmsg.msg.PendingChannelID, err)

10
lnwallet/errors.go
View file

@ -132,16 +132,6 @@ func ErrNumConfsTooLarge(numConfs, maxNumConfs uint32) error {
}
}
// ErrMaxValueInFlightTooLarge returns an error indicating that the 'max HTLC
// value in flight' the remote required is too large to be accepted.
func ErrMaxValueInFlightTooLarge(maxValInFlight,
maxMaxValInFlight lnwire.MilliSatoshi) ReservationError {
return ReservationError{
fmt.Errorf("maxValueInFlight too large: %v, max is %v",
maxValInFlight, maxMaxValInFlight),
}
}
// ErrChanTooSmall returns an error indicating that an incoming channel request
// was too small. We'll reject any incoming channels if they're below our
// configured value for the min channel size we'll accept.

16
lnwallet/interface_test.go
View file

@ -437,9 +437,7 @@ func testDualFundingReservationWorkflow(miner *rpctest.Harness,
MaxAcceptedHtlcs: lnwallet.MaxHTLCNumber / 2,
CsvDelay: csvDelay,
}
err = aliceChanReservation.CommitConstraints(
channelConstraints, fundingAmount*2,
)
err = aliceChanReservation.CommitConstraints(channelConstraints)
if err != nil {
t.Fatalf("unable to verify constraints: %v", err)
}
@ -473,9 +471,7 @@ func testDualFundingReservationWorkflow(miner *rpctest.Harness,
if err != nil {
t.Fatalf("bob unable to init channel reservation: %v", err)
}
err = bobChanReservation.CommitConstraints(
channelConstraints, fundingAmount*2,
)
err = bobChanReservation.CommitConstraints(channelConstraints)
if err != nil {
t.Fatalf("unable to verify constraints: %v", err)
}
@ -873,9 +869,7 @@ func testSingleFunderReservationWorkflow(miner *rpctest.Harness,
MaxAcceptedHtlcs: lnwallet.MaxHTLCNumber / 2,
CsvDelay: csvDelay,
}
err = aliceChanReservation.CommitConstraints(
channelConstraints, fundingAmt,
)
err = aliceChanReservation.CommitConstraints(channelConstraints)
if err != nil {
t.Fatalf("unable to verify constraints: %v", err)
}
@ -909,9 +903,7 @@ func testSingleFunderReservationWorkflow(miner *rpctest.Harness,
if err != nil {
t.Fatalf("unable to create bob reservation: %v", err)
}
err = bobChanReservation.CommitConstraints(
channelConstraints, fundingAmt,
)
err = bobChanReservation.CommitConstraints(channelConstraints)
if err != nil {
t.Fatalf("unable to verify constraints: %v", err)
}

14
lnwallet/reservation.go
View file

@ -286,9 +286,7 @@ func (r *ChannelReservation) SetNumConfsRequired(numConfs uint16) {
// of satoshis that can be transferred in a single commitment. This function
// will also attempt to verify the constraints for sanity, returning an error
// if the parameters are seemed unsound.
func (r *ChannelReservation) CommitConstraints(c *channeldb.ChannelConstraints,
capacity btcutil.Amount) error {
func (r *ChannelReservation) CommitConstraints(c *channeldb.ChannelConstraints) error {
r.Lock()
defer r.Unlock()
@ -343,15 +341,7 @@ func (r *ChannelReservation) CommitConstraints(c *channeldb.ChannelConstraints,
)
}
// Fail if the maxValueInFlight is greater than the channel capacity.
capacityMsat := lnwire.NewMSatFromSatoshis(capacity)
if c.MaxPendingAmount > capacityMsat {
return ErrMaxValueInFlightTooLarge(
c.MaxPendingAmount, capacityMsat,
)
}
// Our dust limit should always be less than or equal our proposed
// Our dust limit should always be less than or equal to our proposed
// channel reserve.
if r.ourContribution.DustLimit > c.ChanReserve {
r.ourContribution.DustLimit = c.ChanReserve