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htlcswitch: adopt test for dust threshold

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ziggie 2024-10-31 17:35:53 +01:00
parent cfa073e6ec
commit 5fe9bb2cff
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1 changed files with 16 additions and 4 deletions
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20
htlcswitch/switch_test.go
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@ -4295,10 +4295,16 @@ func TestSwitchDustForwarding(t *testing.T) {
amt := lnwire.NewMSatFromSatoshis(700)
aliceBobFirstHop := n.aliceChannelLink.ShortChanID()
// Alice will send 51 HTLC's of 700sats. Bob will also send 51 HTLC's
// We decreased the max number of inflight HTLCs therefore we also need
// do decrease the max fee exposure.
maxFeeExposure := lnwire.NewMSatFromSatoshis(74500)
n.aliceChannelLink.cfg.MaxFeeExposure = maxFeeExposure
n.firstBobChannelLink.cfg.MaxFeeExposure = maxFeeExposure
// Alice will send 50 HTLC's of 700sats. Bob will also send 50 HTLC's
// of 700sats.
sendDustHtlcs(t, n, true, amt, aliceBobFirstHop, numHTLCs+1)
sendDustHtlcs(t, n, false, amt, aliceBobFirstHop, numHTLCs+1)
sendDustHtlcs(t, n, true, amt, aliceBobFirstHop, numHTLCs)
sendDustHtlcs(t, n, false, amt, aliceBobFirstHop, numHTLCs)
// Generate the parameters needed for Bob to send another dust HTLC.
_, timelock, hops := generateHops(
@ -4318,6 +4324,7 @@ func TestSwitchDustForwarding(t *testing.T) {
OnionBlob: blob,
}
// This is the expected dust without taking the commitfee into account.
expectedDust := maxInflightHtlcs * 2 * amt
assertAlmostDust := func(link *channelLink, mbox MailBox,
@ -4354,7 +4361,12 @@ func TestSwitchDustForwarding(t *testing.T) {
assertAlmostDust(n.firstBobChannelLink, bobMbox, lntypes.Local)
// Sending one more HTLC should fail. SendHTLC won't error, but the
// HTLC should be failed backwards.
// HTLC should be failed backwards. When sending we only check for the
// dust amount without the commitment fee. When the HTLC is added to the
// commitment state (link) we also take into account the commitment fee
// and with a fee of 6000 sat/kw and a commitment size of 724 (non
// anchor channel) we are overexposed in fees (maxFeeExposure) that's
// why the HTLC is failed back.
err = n.bobServer.htlcSwitch.SendHTLC(
aliceBobFirstHop, uint64(bobAttemptID), failingHtlc,
)