mirror of
https://github.com/lightningnetwork/lnd.git
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itest: move multi hop tests to own files
PURE CODE MOVE.
This commit is contained in:
Johan T. Halseth
parent
d81c8bbda7
commit
4b5d91d24d
@ -498,3 +498,76 @@ func checkPaymentStatus(ctxt context.Context, node *lntest.HarnessNode,
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return nil
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}
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func createThreeHopNetwork(t *harnessTest, net *lntest.NetworkHarness,
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carolHodl bool) (*lnrpc.ChannelPoint, *lnrpc.ChannelPoint,
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*lntest.HarnessNode) {
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ctxb := context.Background()
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// We'll start the test by creating a channel between Alice and Bob,
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// which will act as the first leg for out multi-hop HTLC.
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const chanAmt = 1000000
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ctxt, _ := context.WithTimeout(ctxb, channelOpenTimeout)
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aliceChanPoint := openChannelAndAssert(
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ctxt, t, net, net.Alice, net.Bob,
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lntest.OpenChannelParams{
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Amt: chanAmt,
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},
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)
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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err := net.Alice.WaitForNetworkChannelOpen(ctxt, aliceChanPoint)
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if err != nil {
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t.Fatalf("alice didn't report channel: %v", err)
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}
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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err = net.Bob.WaitForNetworkChannelOpen(ctxt, aliceChanPoint)
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if err != nil {
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t.Fatalf("bob didn't report channel: %v", err)
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}
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// Next, we'll create a new node "carol" and have Bob connect to her. If
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// the carolHodl flag is set, we'll make carol always hold onto the
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// HTLC, this way it'll force Bob to go to chain to resolve the HTLC.
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carolFlags := []string{}
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if carolHodl {
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carolFlags = append(carolFlags, "--hodl.exit-settle")
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}
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carol, err := net.NewNode("Carol", carolFlags)
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if err != nil {
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t.Fatalf("unable to create new node: %v", err)
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}
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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if err := net.ConnectNodes(ctxt, net.Bob, carol); err != nil {
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t.Fatalf("unable to connect bob to carol: %v", err)
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}
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// We'll then create a channel from Bob to Carol. After this channel is
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// open, our topology looks like: A -> B -> C.
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ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
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bobChanPoint := openChannelAndAssert(
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ctxt, t, net, net.Bob, carol,
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lntest.OpenChannelParams{
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Amt: chanAmt,
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},
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)
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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err = net.Bob.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
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if err != nil {
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t.Fatalf("alice didn't report channel: %v", err)
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}
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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err = carol.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
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if err != nil {
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t.Fatalf("bob didn't report channel: %v", err)
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}
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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err = net.Alice.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
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if err != nil {
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t.Fatalf("bob didn't report channel: %v", err)
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}
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return aliceChanPoint, bobChanPoint, carol
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}
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250
lntest/itest/lnd_multi-hop_htlc_local_timeout_test.go
Normal file
250
lntest/itest/lnd_multi-hop_htlc_local_timeout_test.go
Normal file
@ -0,0 +1,250 @@
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// +build rpctest
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package itest
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import (
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"context"
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"fmt"
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"time"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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"github.com/davecgh/go-spew/spew"
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"github.com/lightningnetwork/lnd"
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"github.com/lightningnetwork/lnd/lnrpc"
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"github.com/lightningnetwork/lnd/lntest"
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"github.com/lightningnetwork/lnd/lntest/wait"
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)
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// testMultiHopHtlcLocalTimeout tests that in a multi-hop HTLC scenario, if the
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// outgoing HTLC is about to time out, then we'll go to chain in order to claim
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// it. Any dust HTLC's should be immediately canceled backwards. Once the
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// timeout has been reached, then we should sweep it on-chain, and cancel the
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// HTLC backwards.
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func testMultiHopHtlcLocalTimeout(net *lntest.NetworkHarness, t *harnessTest) {
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ctxb := context.Background()
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// First, we'll create a three hop network: Alice -> Bob -> Carol, with
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// Carol refusing to actually settle or directly cancel any HTLC's
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// self.
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aliceChanPoint, bobChanPoint, carol :=
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createThreeHopNetwork(t, net, true)
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// Clean up carol's node when the test finishes.
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defer shutdownAndAssert(net, t, carol)
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time.Sleep(time.Second * 1)
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// Now that our channels are set up, we'll send two HTLC's from Alice
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// to Carol. The first HTLC will be universally considered "dust",
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// while the second will be a proper fully valued HTLC.
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const (
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dustHtlcAmt = btcutil.Amount(100)
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htlcAmt = btcutil.Amount(30000)
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finalCltvDelta = 40
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)
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ctx, cancel := context.WithCancel(ctxb)
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defer cancel()
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alicePayStream, err := net.Alice.SendPayment(ctx)
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if err != nil {
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t.Fatalf("unable to create payment stream for alice: %v", err)
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}
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// We'll create two random payment hashes unknown to carol, then send
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// each of them by manually specifying the HTLC details.
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carolPubKey := carol.PubKey[:]
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dustPayHash := makeFakePayHash(t)
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payHash := makeFakePayHash(t)
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err = alicePayStream.Send(&lnrpc.SendRequest{
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Dest: carolPubKey,
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Amt: int64(dustHtlcAmt),
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PaymentHash: dustPayHash,
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FinalCltvDelta: finalCltvDelta,
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})
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if err != nil {
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t.Fatalf("unable to send alice htlc: %v", err)
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}
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err = alicePayStream.Send(&lnrpc.SendRequest{
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Dest: carolPubKey,
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Amt: int64(htlcAmt),
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PaymentHash: payHash,
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FinalCltvDelta: finalCltvDelta,
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})
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if err != nil {
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t.Fatalf("unable to send alice htlc: %v", err)
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}
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// Verify that all nodes in the path now have two HTLC's with the
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// proper parameters.
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var predErr error
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nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol}
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err = wait.Predicate(func() bool {
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predErr = assertActiveHtlcs(nodes, dustPayHash, payHash)
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if predErr != nil {
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return false
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}
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return true
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}, time.Second*15)
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if err != nil {
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t.Fatalf("htlc mismatch: %v", predErr)
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}
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// We'll now mine enough blocks to trigger Bob's broadcast of his
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// commitment transaction due to the fact that the HTLC is about to
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// timeout. With the default outgoing broadcast delta of zero, this will
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// be the same height as the htlc expiry height.
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numBlocks := padCLTV(
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uint32(finalCltvDelta - lnd.DefaultOutgoingBroadcastDelta),
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)
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if _, err := net.Miner.Node.Generate(numBlocks); err != nil {
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t.Fatalf("unable to generate blocks: %v", err)
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}
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// Bob's force close transaction should now be found in the mempool.
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bobFundingTxid, err := lnd.GetChanPointFundingTxid(bobChanPoint)
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if err != nil {
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t.Fatalf("unable to get txid: %v", err)
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}
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closeTxid, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
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if err != nil {
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t.Fatalf("unable to find closing txid: %v", err)
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}
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assertSpendingTxInMempool(
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t, net.Miner.Node, minerMempoolTimeout, wire.OutPoint{
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Hash: *bobFundingTxid,
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Index: bobChanPoint.OutputIndex,
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},
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)
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// Mine a block to confirm the closing transaction.
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mineBlocks(t, net, 1, 1)
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// At this point, Bob should have canceled backwards the dust HTLC
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// that we sent earlier. This means Alice should now only have a single
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// HTLC on her channel.
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nodes = []*lntest.HarnessNode{net.Alice}
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err = wait.Predicate(func() bool {
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predErr = assertActiveHtlcs(nodes, payHash)
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if predErr != nil {
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return false
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}
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return true
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}, time.Second*15)
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if err != nil {
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t.Fatalf("htlc mismatch: %v", predErr)
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}
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// With the closing transaction confirmed, we should expect Bob's HTLC
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// timeout transaction to be broadcast due to the expiry being reached.
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htlcTimeout, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
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if err != nil {
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t.Fatalf("unable to find bob's htlc timeout tx: %v", err)
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}
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// We'll mine the remaining blocks in order to generate the sweep
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// transaction of Bob's commitment output.
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mineBlocks(t, net, defaultCSV, 1)
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assertSpendingTxInMempool(
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t, net.Miner.Node, minerMempoolTimeout, wire.OutPoint{
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Hash: *closeTxid,
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Index: 1,
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},
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)
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// Bob's pending channel report should show that he has a commitment
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// output awaiting sweeping, and also that there's an outgoing HTLC
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// output pending.
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pendingChansRequest := &lnrpc.PendingChannelsRequest{}
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ctxt, _ := context.WithTimeout(ctxb, defaultTimeout)
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pendingChanResp, err := net.Bob.PendingChannels(ctxt, pendingChansRequest)
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if err != nil {
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t.Fatalf("unable to query for pending channels: %v", err)
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}
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if len(pendingChanResp.PendingForceClosingChannels) == 0 {
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t.Fatalf("bob should have pending for close chan but doesn't")
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}
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forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
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if forceCloseChan.LimboBalance == 0 {
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t.Fatalf("bob should have nonzero limbo balance instead "+
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"has: %v", forceCloseChan.LimboBalance)
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}
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if len(forceCloseChan.PendingHtlcs) == 0 {
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t.Fatalf("bob should have pending htlc but doesn't")
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}
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// Now we'll mine an additional block, which should confirm Bob's commit
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// sweep. This block should also prompt Bob to broadcast their second
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// layer sweep due to the CSV on the HTLC timeout output.
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mineBlocks(t, net, 1, 1)
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assertSpendingTxInMempool(
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t, net.Miner.Node, minerMempoolTimeout, wire.OutPoint{
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Hash: *htlcTimeout,
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Index: 0,
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},
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)
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// The block should have confirmed Bob's HTLC timeout transaction.
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// Therefore, at this point, there should be no active HTLC's on the
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// commitment transaction from Alice -> Bob.
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nodes = []*lntest.HarnessNode{net.Alice}
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err = wait.Predicate(func() bool {
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predErr = assertNumActiveHtlcs(nodes, 0)
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if predErr != nil {
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return false
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}
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return true
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}, time.Second*15)
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if err != nil {
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t.Fatalf("alice's channel still has active htlc's: %v", predErr)
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}
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// At this point, Bob should show that the pending HTLC has advanced to
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// the second stage and is to be swept.
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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pendingChanResp, err = net.Bob.PendingChannels(ctxt, pendingChansRequest)
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if err != nil {
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t.Fatalf("unable to query for pending channels: %v", err)
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}
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forceCloseChan = pendingChanResp.PendingForceClosingChannels[0]
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if forceCloseChan.PendingHtlcs[0].Stage != 2 {
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t.Fatalf("bob's htlc should have advanced to the second stage: %v", err)
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}
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// Next, we'll mine a final block that should confirm the second-layer
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// sweeping transaction.
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if _, err := net.Miner.Node.Generate(1); err != nil {
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t.Fatalf("unable to generate blocks: %v", err)
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}
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// Once this transaction has been confirmed, Bob should detect that he
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// no longer has any pending channels.
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err = wait.Predicate(func() bool {
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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pendingChanResp, err = net.Bob.PendingChannels(ctxt, pendingChansRequest)
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if err != nil {
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predErr = fmt.Errorf("unable to query for pending "+
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"channels: %v", err)
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return false
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}
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if len(pendingChanResp.PendingForceClosingChannels) != 0 {
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predErr = fmt.Errorf("bob still has pending "+
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"channels but shouldn't: %v",
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spew.Sdump(pendingChanResp))
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return false
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}
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return true
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}, time.Second*15)
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if err != nil {
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t.Fatalf(predErr.Error())
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}
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ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
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closeChannelAndAssert(ctxt, t, net, net.Alice, aliceChanPoint, false)
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}
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@ -0,0 +1,278 @@
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// +build rpctest
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package itest
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import (
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"context"
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"fmt"
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"time"
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"github.com/btcsuite/btcutil"
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"github.com/davecgh/go-spew/spew"
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"github.com/lightningnetwork/lnd/lnrpc"
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"github.com/lightningnetwork/lnd/lntest"
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"github.com/lightningnetwork/lnd/lntest/wait"
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)
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// testMultiHopLocalForceCloseOnChainHtlcTimeout tests that in a multi-hop HTLC
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// scenario, if the node that extended the HTLC to the final node closes their
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// commitment on-chain early, then it eventually recognizes this HTLC as one
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// that's timed out. At this point, the node should timeout the HTLC, then
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// cancel it backwards as normal.
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func testMultiHopLocalForceCloseOnChainHtlcTimeout(net *lntest.NetworkHarness,
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t *harnessTest) {
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ctxb := context.Background()
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// First, we'll create a three hop network: Alice -> Bob -> Carol, with
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// Carol refusing to actually settle or directly cancel any HTLC's
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// self.
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aliceChanPoint, bobChanPoint, carol :=
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createThreeHopNetwork(t, net, true)
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// Clean up carol's node when the test finishes.
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defer shutdownAndAssert(net, t, carol)
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// With our channels set up, we'll then send a single HTLC from Alice
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// to Carol. As Carol is in hodl mode, she won't settle this HTLC which
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// opens up the base for out tests.
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const (
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finalCltvDelta = 40
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htlcAmt = btcutil.Amount(30000)
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)
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ctx, cancel := context.WithCancel(ctxb)
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defer cancel()
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alicePayStream, err := net.Alice.SendPayment(ctx)
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if err != nil {
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t.Fatalf("unable to create payment stream for alice: %v", err)
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}
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// We'll now send a single HTLC across our multi-hop network.
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carolPubKey := carol.PubKey[:]
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payHash := makeFakePayHash(t)
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err = alicePayStream.Send(&lnrpc.SendRequest{
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Dest: carolPubKey,
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Amt: int64(htlcAmt),
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PaymentHash: payHash,
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FinalCltvDelta: finalCltvDelta,
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})
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if err != nil {
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t.Fatalf("unable to send alice htlc: %v", err)
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}
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// Once the HTLC has cleared, all channels in our mini network should
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// have the it locked in.
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var predErr error
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nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol}
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err = wait.Predicate(func() bool {
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predErr = assertActiveHtlcs(nodes, payHash)
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if predErr != nil {
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return false
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}
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return true
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}, time.Second*15)
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if err != nil {
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t.Fatalf("htlc mismatch: %v", err)
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}
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// Now that all parties have the HTLC locked in, we'll immediately
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// force close the Bob -> Carol channel. This should trigger contract
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// resolution mode for both of them.
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ctxt, _ := context.WithTimeout(ctxb, channelCloseTimeout)
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closeChannelAndAssert(ctxt, t, net, net.Bob, bobChanPoint, true)
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// At this point, Bob should have a pending force close channel as he
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// just went to chain.
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pendingChansRequest := &lnrpc.PendingChannelsRequest{}
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err = wait.Predicate(func() bool {
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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pendingChanResp, err := net.Bob.PendingChannels(ctxt,
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pendingChansRequest)
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if err != nil {
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predErr = fmt.Errorf("unable to query for pending "+
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"channels: %v", err)
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return false
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}
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if len(pendingChanResp.PendingForceClosingChannels) == 0 {
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predErr = fmt.Errorf("bob should have pending for " +
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"close chan but doesn't")
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return false
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}
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forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
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if forceCloseChan.LimboBalance == 0 {
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predErr = fmt.Errorf("bob should have nonzero limbo "+
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"balance instead has: %v",
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forceCloseChan.LimboBalance)
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return false
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}
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return true
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}, time.Second*15)
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if err != nil {
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t.Fatalf(predErr.Error())
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}
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// We'll mine defaultCSV blocks in order to generate the sweep transaction
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// of Bob's funding output.
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if _, err := net.Miner.Node.Generate(defaultCSV); err != nil {
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t.Fatalf("unable to generate blocks: %v", err)
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}
|
||||
|
||||
_, err = waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's funding output sweep tx: %v", err)
|
||||
}
|
||||
|
||||
// We'll now mine enough blocks for the HTLC to expire. After this, Bob
|
||||
// should hand off the now expired HTLC output to the utxo nursery.
|
||||
numBlocks := padCLTV(uint32(finalCltvDelta - defaultCSV - 1))
|
||||
if _, err := net.Miner.Node.Generate(numBlocks); err != nil {
|
||||
t.Fatalf("unable to generate blocks: %v", err)
|
||||
}
|
||||
|
||||
// Bob's pending channel report should show that he has a single HTLC
|
||||
// that's now in stage one.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending force " +
|
||||
"close chan but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
|
||||
if len(forceCloseChan.PendingHtlcs) != 1 {
|
||||
predErr = fmt.Errorf("bob should have pending htlc " +
|
||||
"but doesn't")
|
||||
return false
|
||||
}
|
||||
if forceCloseChan.PendingHtlcs[0].Stage != 1 {
|
||||
predErr = fmt.Errorf("bob's htlc should have "+
|
||||
"advanced to the first stage: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't hand off time-locked HTLC: %v", predErr)
|
||||
}
|
||||
|
||||
// We should also now find a transaction in the mempool, as Bob should
|
||||
// have broadcast his second layer timeout transaction.
|
||||
timeoutTx, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's htlc timeout tx: %v", err)
|
||||
}
|
||||
|
||||
// Next, we'll mine an additional block. This should serve to confirm
|
||||
// the second layer timeout transaction.
|
||||
block := mineBlocks(t, net, 1, 1)[0]
|
||||
assertTxInBlock(t, block, timeoutTx)
|
||||
|
||||
// With the second layer timeout transaction confirmed, Bob should have
|
||||
// canceled backwards the HTLC that carol sent.
|
||||
nodes = []*lntest.HarnessNode{net.Alice}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertNumActiveHtlcs(nodes, 0)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("alice's channel still has active htlc's: %v", predErr)
|
||||
}
|
||||
|
||||
// Additionally, Bob should now show that HTLC as being advanced to the
|
||||
// second stage.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending for " +
|
||||
"close chan but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
|
||||
if len(forceCloseChan.PendingHtlcs) != 1 {
|
||||
predErr = fmt.Errorf("bob should have pending htlc " +
|
||||
"but doesn't")
|
||||
return false
|
||||
}
|
||||
if forceCloseChan.PendingHtlcs[0].Stage != 2 {
|
||||
predErr = fmt.Errorf("bob's htlc should have "+
|
||||
"advanced to the second stage: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't hand off time-locked HTLC: %v", predErr)
|
||||
}
|
||||
|
||||
// We'll now mine 4 additional blocks. This should be enough for Bob's
|
||||
// CSV timelock to expire and the sweeping transaction of the HTLC to be
|
||||
// broadcast.
|
||||
if _, err := net.Miner.Node.Generate(defaultCSV); err != nil {
|
||||
t.Fatalf("unable to mine blocks: %v", err)
|
||||
}
|
||||
|
||||
sweepTx, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's htlc sweep tx: %v", err)
|
||||
}
|
||||
|
||||
// We'll then mine a final block which should confirm this second layer
|
||||
// sweep transaction.
|
||||
block = mineBlocks(t, net, 1, 1)[0]
|
||||
assertTxInBlock(t, block, sweepTx)
|
||||
|
||||
// At this point, Bob should no longer show any channels as pending
|
||||
// close.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
if len(pendingChanResp.PendingForceClosingChannels) != 0 {
|
||||
predErr = fmt.Errorf("bob still has pending channels "+
|
||||
"but shouldn't: %v", spew.Sdump(pendingChanResp))
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf(predErr.Error())
|
||||
}
|
||||
|
||||
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
|
||||
closeChannelAndAssert(ctxt, t, net, net.Alice, aliceChanPoint, false)
|
||||
}
|
||||
@ -0,0 +1,236 @@
|
||||
// +build rpctest
|
||||
|
||||
package itest
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"time"
|
||||
|
||||
"github.com/btcsuite/btcutil"
|
||||
"github.com/davecgh/go-spew/spew"
|
||||
"github.com/lightningnetwork/lnd/lnrpc"
|
||||
"github.com/lightningnetwork/lnd/lntest"
|
||||
"github.com/lightningnetwork/lnd/lntest/wait"
|
||||
)
|
||||
|
||||
// testMultiHopRemoteForceCloseOnChainHtlcTimeout tests that if we extend a
|
||||
// multi-hop HTLC, and the final destination of the HTLC force closes the
|
||||
// channel, then we properly timeout the HTLC on *their* commitment transaction
|
||||
// once the timeout has expired. Once we sweep the transaction, we should also
|
||||
// cancel back the initial HTLC.
|
||||
func testMultiHopRemoteForceCloseOnChainHtlcTimeout(net *lntest.NetworkHarness,
|
||||
t *harnessTest) {
|
||||
ctxb := context.Background()
|
||||
|
||||
// First, we'll create a three hop network: Alice -> Bob -> Carol, with
|
||||
// Carol refusing to actually settle or directly cancel any HTLC's
|
||||
// self.
|
||||
aliceChanPoint, bobChanPoint, carol :=
|
||||
createThreeHopNetwork(t, net, true)
|
||||
|
||||
// Clean up carol's node when the test finishes.
|
||||
defer shutdownAndAssert(net, t, carol)
|
||||
|
||||
// With our channels set up, we'll then send a single HTLC from Alice
|
||||
// to Carol. As Carol is in hodl mode, she won't settle this HTLC which
|
||||
// opens up the base for out tests.
|
||||
const (
|
||||
finalCltvDelta = 40
|
||||
htlcAmt = btcutil.Amount(30000)
|
||||
)
|
||||
|
||||
ctx, cancel := context.WithCancel(ctxb)
|
||||
defer cancel()
|
||||
|
||||
alicePayStream, err := net.Alice.SendPayment(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create payment stream for alice: %v", err)
|
||||
}
|
||||
|
||||
// We'll now send a single HTLC across our multi-hop network.
|
||||
carolPubKey := carol.PubKey[:]
|
||||
payHash := makeFakePayHash(t)
|
||||
err = alicePayStream.Send(&lnrpc.SendRequest{
|
||||
Dest: carolPubKey,
|
||||
Amt: int64(htlcAmt),
|
||||
PaymentHash: payHash,
|
||||
FinalCltvDelta: finalCltvDelta,
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatalf("unable to send alice htlc: %v", err)
|
||||
}
|
||||
|
||||
// Once the HTLC has cleared, all the nodes in our mini network should
|
||||
// show that the HTLC has been locked in.
|
||||
var predErr error
|
||||
nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertActiveHtlcs(nodes, payHash)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("htlc mismatch: %v", predErr)
|
||||
}
|
||||
|
||||
// At this point, we'll now instruct Carol to force close the
|
||||
// transaction. This will let us exercise that Bob is able to sweep the
|
||||
// expired HTLC on Carol's version of the commitment transaction.
|
||||
ctxt, _ := context.WithTimeout(ctxb, channelCloseTimeout)
|
||||
closeChannelAndAssert(ctxt, t, net, carol, bobChanPoint, true)
|
||||
|
||||
// At this point, Bob should have a pending force close channel as
|
||||
// Carol has gone directly to chain.
|
||||
pendingChansRequest := &lnrpc.PendingChannelsRequest{}
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for "+
|
||||
"pending channels: %v", err)
|
||||
return false
|
||||
}
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending " +
|
||||
"force close channels but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf(predErr.Error())
|
||||
}
|
||||
|
||||
// Bob can sweep his output immediately.
|
||||
_, err = waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's funding output sweep tx: %v",
|
||||
err)
|
||||
}
|
||||
|
||||
// Next, we'll mine enough blocks for the HTLC to expire. At this
|
||||
// point, Bob should hand off the output to his internal utxo nursery,
|
||||
// which will broadcast a sweep transaction.
|
||||
numBlocks := padCLTV(finalCltvDelta - 1)
|
||||
if _, err := net.Miner.Node.Generate(numBlocks); err != nil {
|
||||
t.Fatalf("unable to generate blocks: %v", err)
|
||||
}
|
||||
|
||||
// If we check Bob's pending channel report, it should show that he has
|
||||
// a single HTLC that's now in the second stage, as skip the initial
|
||||
// first stage since this is a direct HTLC.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending for " +
|
||||
"close chan but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
|
||||
if len(forceCloseChan.PendingHtlcs) != 1 {
|
||||
predErr = fmt.Errorf("bob should have pending htlc " +
|
||||
"but doesn't")
|
||||
return false
|
||||
}
|
||||
if forceCloseChan.PendingHtlcs[0].Stage != 2 {
|
||||
predErr = fmt.Errorf("bob's htlc should have "+
|
||||
"advanced to the second stage: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't hand off time-locked HTLC: %v", predErr)
|
||||
}
|
||||
|
||||
// Bob's sweeping transaction should now be found in the mempool at
|
||||
// this point.
|
||||
sweepTx, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
// If Bob's transaction isn't yet in the mempool, then due to
|
||||
// internal message passing and the low period between blocks
|
||||
// being mined, it may have been detected as a late
|
||||
// registration. As a result, we'll mine another block and
|
||||
// repeat the check. If it doesn't go through this time, then
|
||||
// we'll fail.
|
||||
// TODO(halseth): can we use waitForChannelPendingForceClose to
|
||||
// avoid this hack?
|
||||
if _, err := net.Miner.Node.Generate(1); err != nil {
|
||||
t.Fatalf("unable to generate block: %v", err)
|
||||
}
|
||||
sweepTx, err = waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's sweeping transaction: "+
|
||||
"%v", err)
|
||||
}
|
||||
}
|
||||
|
||||
// If we mine an additional block, then this should confirm Bob's
|
||||
// transaction which sweeps the direct HTLC output.
|
||||
block := mineBlocks(t, net, 1, 1)[0]
|
||||
assertTxInBlock(t, block, sweepTx)
|
||||
|
||||
// Now that the sweeping transaction has been confirmed, Bob should
|
||||
// cancel back that HTLC. As a result, Alice should not know of any
|
||||
// active HTLC's.
|
||||
nodes = []*lntest.HarnessNode{net.Alice}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertNumActiveHtlcs(nodes, 0)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("alice's channel still has active htlc's: %v", predErr)
|
||||
}
|
||||
|
||||
// Now we'll check Bob's pending channel report. Since this was Carol's
|
||||
// commitment, he doesn't have to wait for any CSV delays. As a result,
|
||||
// he should show no additional pending transactions.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
if len(pendingChanResp.PendingForceClosingChannels) != 0 {
|
||||
predErr = fmt.Errorf("bob still has pending channels "+
|
||||
"but shouldn't: %v", spew.Sdump(pendingChanResp))
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf(predErr.Error())
|
||||
}
|
||||
|
||||
// We'll close out the test by closing the channel from Alice to Bob,
|
||||
// and then shutting down the new node we created as its no longer
|
||||
// needed.
|
||||
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
|
||||
closeChannelAndAssert(ctxt, t, net, net.Alice, aliceChanPoint, false)
|
||||
}
|
||||
@ -10593,796 +10593,6 @@ func assertSpendingTxInMempool(t *harnessTest, miner *rpcclient.Client,
|
||||
}
|
||||
}
|
||||
|
||||
func createThreeHopNetwork(t *harnessTest, net *lntest.NetworkHarness,
|
||||
carolHodl bool) (*lnrpc.ChannelPoint, *lnrpc.ChannelPoint,
|
||||
*lntest.HarnessNode) {
|
||||
|
||||
ctxb := context.Background()
|
||||
|
||||
// We'll start the test by creating a channel between Alice and Bob,
|
||||
// which will act as the first leg for out multi-hop HTLC.
|
||||
const chanAmt = 1000000
|
||||
ctxt, _ := context.WithTimeout(ctxb, channelOpenTimeout)
|
||||
aliceChanPoint := openChannelAndAssert(
|
||||
ctxt, t, net, net.Alice, net.Bob,
|
||||
lntest.OpenChannelParams{
|
||||
Amt: chanAmt,
|
||||
},
|
||||
)
|
||||
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
err := net.Alice.WaitForNetworkChannelOpen(ctxt, aliceChanPoint)
|
||||
if err != nil {
|
||||
t.Fatalf("alice didn't report channel: %v", err)
|
||||
}
|
||||
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
err = net.Bob.WaitForNetworkChannelOpen(ctxt, aliceChanPoint)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't report channel: %v", err)
|
||||
}
|
||||
|
||||
// Next, we'll create a new node "carol" and have Bob connect to her. If
|
||||
// the carolHodl flag is set, we'll make carol always hold onto the
|
||||
// HTLC, this way it'll force Bob to go to chain to resolve the HTLC.
|
||||
carolFlags := []string{}
|
||||
if carolHodl {
|
||||
carolFlags = append(carolFlags, "--hodl.exit-settle")
|
||||
}
|
||||
carol, err := net.NewNode("Carol", carolFlags)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create new node: %v", err)
|
||||
}
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
if err := net.ConnectNodes(ctxt, net.Bob, carol); err != nil {
|
||||
t.Fatalf("unable to connect bob to carol: %v", err)
|
||||
}
|
||||
|
||||
// We'll then create a channel from Bob to Carol. After this channel is
|
||||
// open, our topology looks like: A -> B -> C.
|
||||
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
|
||||
bobChanPoint := openChannelAndAssert(
|
||||
ctxt, t, net, net.Bob, carol,
|
||||
lntest.OpenChannelParams{
|
||||
Amt: chanAmt,
|
||||
},
|
||||
)
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
err = net.Bob.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
|
||||
if err != nil {
|
||||
t.Fatalf("alice didn't report channel: %v", err)
|
||||
}
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
err = carol.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't report channel: %v", err)
|
||||
}
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
err = net.Alice.WaitForNetworkChannelOpen(ctxt, bobChanPoint)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't report channel: %v", err)
|
||||
}
|
||||
|
||||
return aliceChanPoint, bobChanPoint, carol
|
||||
}
|
||||
|
||||
// testMultiHopHtlcLocalTimeout tests that in a multi-hop HTLC scenario, if the
|
||||
// outgoing HTLC is about to time out, then we'll go to chain in order to claim
|
||||
// it. Any dust HTLC's should be immediately canceled backwards. Once the
|
||||
// timeout has been reached, then we should sweep it on-chain, and cancel the
|
||||
// HTLC backwards.
|
||||
func testMultiHopHtlcLocalTimeout(net *lntest.NetworkHarness, t *harnessTest) {
|
||||
ctxb := context.Background()
|
||||
|
||||
// First, we'll create a three hop network: Alice -> Bob -> Carol, with
|
||||
// Carol refusing to actually settle or directly cancel any HTLC's
|
||||
// self.
|
||||
aliceChanPoint, bobChanPoint, carol :=
|
||||
createThreeHopNetwork(t, net, true)
|
||||
|
||||
// Clean up carol's node when the test finishes.
|
||||
defer shutdownAndAssert(net, t, carol)
|
||||
|
||||
time.Sleep(time.Second * 1)
|
||||
|
||||
// Now that our channels are set up, we'll send two HTLC's from Alice
|
||||
// to Carol. The first HTLC will be universally considered "dust",
|
||||
// while the second will be a proper fully valued HTLC.
|
||||
const (
|
||||
dustHtlcAmt = btcutil.Amount(100)
|
||||
htlcAmt = btcutil.Amount(30000)
|
||||
finalCltvDelta = 40
|
||||
)
|
||||
|
||||
ctx, cancel := context.WithCancel(ctxb)
|
||||
defer cancel()
|
||||
|
||||
alicePayStream, err := net.Alice.SendPayment(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create payment stream for alice: %v", err)
|
||||
}
|
||||
|
||||
// We'll create two random payment hashes unknown to carol, then send
|
||||
// each of them by manually specifying the HTLC details.
|
||||
carolPubKey := carol.PubKey[:]
|
||||
dustPayHash := makeFakePayHash(t)
|
||||
payHash := makeFakePayHash(t)
|
||||
err = alicePayStream.Send(&lnrpc.SendRequest{
|
||||
Dest: carolPubKey,
|
||||
Amt: int64(dustHtlcAmt),
|
||||
PaymentHash: dustPayHash,
|
||||
FinalCltvDelta: finalCltvDelta,
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatalf("unable to send alice htlc: %v", err)
|
||||
}
|
||||
err = alicePayStream.Send(&lnrpc.SendRequest{
|
||||
Dest: carolPubKey,
|
||||
Amt: int64(htlcAmt),
|
||||
PaymentHash: payHash,
|
||||
FinalCltvDelta: finalCltvDelta,
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatalf("unable to send alice htlc: %v", err)
|
||||
}
|
||||
|
||||
// Verify that all nodes in the path now have two HTLC's with the
|
||||
// proper parameters.
|
||||
var predErr error
|
||||
nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertActiveHtlcs(nodes, dustPayHash, payHash)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("htlc mismatch: %v", predErr)
|
||||
}
|
||||
|
||||
// We'll now mine enough blocks to trigger Bob's broadcast of his
|
||||
// commitment transaction due to the fact that the HTLC is about to
|
||||
// timeout. With the default outgoing broadcast delta of zero, this will
|
||||
// be the same height as the htlc expiry height.
|
||||
numBlocks := padCLTV(
|
||||
uint32(finalCltvDelta - lnd.DefaultOutgoingBroadcastDelta),
|
||||
)
|
||||
if _, err := net.Miner.Node.Generate(numBlocks); err != nil {
|
||||
t.Fatalf("unable to generate blocks: %v", err)
|
||||
}
|
||||
|
||||
// Bob's force close transaction should now be found in the mempool.
|
||||
bobFundingTxid, err := lnd.GetChanPointFundingTxid(bobChanPoint)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to get txid: %v", err)
|
||||
}
|
||||
closeTxid, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find closing txid: %v", err)
|
||||
}
|
||||
assertSpendingTxInMempool(
|
||||
t, net.Miner.Node, minerMempoolTimeout, wire.OutPoint{
|
||||
Hash: *bobFundingTxid,
|
||||
Index: bobChanPoint.OutputIndex,
|
||||
},
|
||||
)
|
||||
|
||||
// Mine a block to confirm the closing transaction.
|
||||
mineBlocks(t, net, 1, 1)
|
||||
|
||||
// At this point, Bob should have canceled backwards the dust HTLC
|
||||
// that we sent earlier. This means Alice should now only have a single
|
||||
// HTLC on her channel.
|
||||
nodes = []*lntest.HarnessNode{net.Alice}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertActiveHtlcs(nodes, payHash)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("htlc mismatch: %v", predErr)
|
||||
}
|
||||
|
||||
// With the closing transaction confirmed, we should expect Bob's HTLC
|
||||
// timeout transaction to be broadcast due to the expiry being reached.
|
||||
htlcTimeout, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's htlc timeout tx: %v", err)
|
||||
}
|
||||
|
||||
// We'll mine the remaining blocks in order to generate the sweep
|
||||
// transaction of Bob's commitment output.
|
||||
mineBlocks(t, net, defaultCSV, 1)
|
||||
assertSpendingTxInMempool(
|
||||
t, net.Miner.Node, minerMempoolTimeout, wire.OutPoint{
|
||||
Hash: *closeTxid,
|
||||
Index: 1,
|
||||
},
|
||||
)
|
||||
|
||||
// Bob's pending channel report should show that he has a commitment
|
||||
// output awaiting sweeping, and also that there's an outgoing HTLC
|
||||
// output pending.
|
||||
pendingChansRequest := &lnrpc.PendingChannelsRequest{}
|
||||
ctxt, _ := context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(ctxt, pendingChansRequest)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to query for pending channels: %v", err)
|
||||
}
|
||||
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
t.Fatalf("bob should have pending for close chan but doesn't")
|
||||
}
|
||||
forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
|
||||
if forceCloseChan.LimboBalance == 0 {
|
||||
t.Fatalf("bob should have nonzero limbo balance instead "+
|
||||
"has: %v", forceCloseChan.LimboBalance)
|
||||
}
|
||||
if len(forceCloseChan.PendingHtlcs) == 0 {
|
||||
t.Fatalf("bob should have pending htlc but doesn't")
|
||||
}
|
||||
|
||||
// Now we'll mine an additional block, which should confirm Bob's commit
|
||||
// sweep. This block should also prompt Bob to broadcast their second
|
||||
// layer sweep due to the CSV on the HTLC timeout output.
|
||||
mineBlocks(t, net, 1, 1)
|
||||
assertSpendingTxInMempool(
|
||||
t, net.Miner.Node, minerMempoolTimeout, wire.OutPoint{
|
||||
Hash: *htlcTimeout,
|
||||
Index: 0,
|
||||
},
|
||||
)
|
||||
|
||||
// The block should have confirmed Bob's HTLC timeout transaction.
|
||||
// Therefore, at this point, there should be no active HTLC's on the
|
||||
// commitment transaction from Alice -> Bob.
|
||||
nodes = []*lntest.HarnessNode{net.Alice}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertNumActiveHtlcs(nodes, 0)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("alice's channel still has active htlc's: %v", predErr)
|
||||
}
|
||||
|
||||
// At this point, Bob should show that the pending HTLC has advanced to
|
||||
// the second stage and is to be swept.
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err = net.Bob.PendingChannels(ctxt, pendingChansRequest)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to query for pending channels: %v", err)
|
||||
}
|
||||
forceCloseChan = pendingChanResp.PendingForceClosingChannels[0]
|
||||
if forceCloseChan.PendingHtlcs[0].Stage != 2 {
|
||||
t.Fatalf("bob's htlc should have advanced to the second stage: %v", err)
|
||||
}
|
||||
|
||||
// Next, we'll mine a final block that should confirm the second-layer
|
||||
// sweeping transaction.
|
||||
if _, err := net.Miner.Node.Generate(1); err != nil {
|
||||
t.Fatalf("unable to generate blocks: %v", err)
|
||||
}
|
||||
|
||||
// Once this transaction has been confirmed, Bob should detect that he
|
||||
// no longer has any pending channels.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err = net.Bob.PendingChannels(ctxt, pendingChansRequest)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
if len(pendingChanResp.PendingForceClosingChannels) != 0 {
|
||||
predErr = fmt.Errorf("bob still has pending "+
|
||||
"channels but shouldn't: %v",
|
||||
spew.Sdump(pendingChanResp))
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf(predErr.Error())
|
||||
}
|
||||
|
||||
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
|
||||
closeChannelAndAssert(ctxt, t, net, net.Alice, aliceChanPoint, false)
|
||||
}
|
||||
|
||||
// testMultiHopLocalForceCloseOnChainHtlcTimeout tests that in a multi-hop HTLC
|
||||
// scenario, if the node that extended the HTLC to the final node closes their
|
||||
// commitment on-chain early, then it eventually recognizes this HTLC as one
|
||||
// that's timed out. At this point, the node should timeout the HTLC, then
|
||||
// cancel it backwards as normal.
|
||||
func testMultiHopLocalForceCloseOnChainHtlcTimeout(net *lntest.NetworkHarness,
|
||||
t *harnessTest) {
|
||||
ctxb := context.Background()
|
||||
|
||||
// First, we'll create a three hop network: Alice -> Bob -> Carol, with
|
||||
// Carol refusing to actually settle or directly cancel any HTLC's
|
||||
// self.
|
||||
aliceChanPoint, bobChanPoint, carol :=
|
||||
createThreeHopNetwork(t, net, true)
|
||||
|
||||
// Clean up carol's node when the test finishes.
|
||||
defer shutdownAndAssert(net, t, carol)
|
||||
|
||||
// With our channels set up, we'll then send a single HTLC from Alice
|
||||
// to Carol. As Carol is in hodl mode, she won't settle this HTLC which
|
||||
// opens up the base for out tests.
|
||||
const (
|
||||
finalCltvDelta = 40
|
||||
htlcAmt = btcutil.Amount(30000)
|
||||
)
|
||||
ctx, cancel := context.WithCancel(ctxb)
|
||||
defer cancel()
|
||||
|
||||
alicePayStream, err := net.Alice.SendPayment(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create payment stream for alice: %v", err)
|
||||
}
|
||||
|
||||
// We'll now send a single HTLC across our multi-hop network.
|
||||
carolPubKey := carol.PubKey[:]
|
||||
payHash := makeFakePayHash(t)
|
||||
err = alicePayStream.Send(&lnrpc.SendRequest{
|
||||
Dest: carolPubKey,
|
||||
Amt: int64(htlcAmt),
|
||||
PaymentHash: payHash,
|
||||
FinalCltvDelta: finalCltvDelta,
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatalf("unable to send alice htlc: %v", err)
|
||||
}
|
||||
|
||||
// Once the HTLC has cleared, all channels in our mini network should
|
||||
// have the it locked in.
|
||||
var predErr error
|
||||
nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertActiveHtlcs(nodes, payHash)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("htlc mismatch: %v", err)
|
||||
}
|
||||
|
||||
// Now that all parties have the HTLC locked in, we'll immediately
|
||||
// force close the Bob -> Carol channel. This should trigger contract
|
||||
// resolution mode for both of them.
|
||||
ctxt, _ := context.WithTimeout(ctxb, channelCloseTimeout)
|
||||
closeChannelAndAssert(ctxt, t, net, net.Bob, bobChanPoint, true)
|
||||
|
||||
// At this point, Bob should have a pending force close channel as he
|
||||
// just went to chain.
|
||||
pendingChansRequest := &lnrpc.PendingChannelsRequest{}
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(ctxt,
|
||||
pendingChansRequest)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending for " +
|
||||
"close chan but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
|
||||
if forceCloseChan.LimboBalance == 0 {
|
||||
predErr = fmt.Errorf("bob should have nonzero limbo "+
|
||||
"balance instead has: %v",
|
||||
forceCloseChan.LimboBalance)
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf(predErr.Error())
|
||||
}
|
||||
|
||||
// We'll mine defaultCSV blocks in order to generate the sweep transaction
|
||||
// of Bob's funding output.
|
||||
if _, err := net.Miner.Node.Generate(defaultCSV); err != nil {
|
||||
t.Fatalf("unable to generate blocks: %v", err)
|
||||
}
|
||||
|
||||
_, err = waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's funding output sweep tx: %v", err)
|
||||
}
|
||||
|
||||
// We'll now mine enough blocks for the HTLC to expire. After this, Bob
|
||||
// should hand off the now expired HTLC output to the utxo nursery.
|
||||
numBlocks := padCLTV(uint32(finalCltvDelta - defaultCSV - 1))
|
||||
if _, err := net.Miner.Node.Generate(numBlocks); err != nil {
|
||||
t.Fatalf("unable to generate blocks: %v", err)
|
||||
}
|
||||
|
||||
// Bob's pending channel report should show that he has a single HTLC
|
||||
// that's now in stage one.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending force " +
|
||||
"close chan but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
|
||||
if len(forceCloseChan.PendingHtlcs) != 1 {
|
||||
predErr = fmt.Errorf("bob should have pending htlc " +
|
||||
"but doesn't")
|
||||
return false
|
||||
}
|
||||
if forceCloseChan.PendingHtlcs[0].Stage != 1 {
|
||||
predErr = fmt.Errorf("bob's htlc should have "+
|
||||
"advanced to the first stage: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't hand off time-locked HTLC: %v", predErr)
|
||||
}
|
||||
|
||||
// We should also now find a transaction in the mempool, as Bob should
|
||||
// have broadcast his second layer timeout transaction.
|
||||
timeoutTx, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's htlc timeout tx: %v", err)
|
||||
}
|
||||
|
||||
// Next, we'll mine an additional block. This should serve to confirm
|
||||
// the second layer timeout transaction.
|
||||
block := mineBlocks(t, net, 1, 1)[0]
|
||||
assertTxInBlock(t, block, timeoutTx)
|
||||
|
||||
// With the second layer timeout transaction confirmed, Bob should have
|
||||
// canceled backwards the HTLC that carol sent.
|
||||
nodes = []*lntest.HarnessNode{net.Alice}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertNumActiveHtlcs(nodes, 0)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("alice's channel still has active htlc's: %v", predErr)
|
||||
}
|
||||
|
||||
// Additionally, Bob should now show that HTLC as being advanced to the
|
||||
// second stage.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending for " +
|
||||
"close chan but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
|
||||
if len(forceCloseChan.PendingHtlcs) != 1 {
|
||||
predErr = fmt.Errorf("bob should have pending htlc " +
|
||||
"but doesn't")
|
||||
return false
|
||||
}
|
||||
if forceCloseChan.PendingHtlcs[0].Stage != 2 {
|
||||
predErr = fmt.Errorf("bob's htlc should have "+
|
||||
"advanced to the second stage: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't hand off time-locked HTLC: %v", predErr)
|
||||
}
|
||||
|
||||
// We'll now mine 4 additional blocks. This should be enough for Bob's
|
||||
// CSV timelock to expire and the sweeping transaction of the HTLC to be
|
||||
// broadcast.
|
||||
if _, err := net.Miner.Node.Generate(defaultCSV); err != nil {
|
||||
t.Fatalf("unable to mine blocks: %v", err)
|
||||
}
|
||||
|
||||
sweepTx, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's htlc sweep tx: %v", err)
|
||||
}
|
||||
|
||||
// We'll then mine a final block which should confirm this second layer
|
||||
// sweep transaction.
|
||||
block = mineBlocks(t, net, 1, 1)[0]
|
||||
assertTxInBlock(t, block, sweepTx)
|
||||
|
||||
// At this point, Bob should no longer show any channels as pending
|
||||
// close.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
if len(pendingChanResp.PendingForceClosingChannels) != 0 {
|
||||
predErr = fmt.Errorf("bob still has pending channels "+
|
||||
"but shouldn't: %v", spew.Sdump(pendingChanResp))
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf(predErr.Error())
|
||||
}
|
||||
|
||||
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
|
||||
closeChannelAndAssert(ctxt, t, net, net.Alice, aliceChanPoint, false)
|
||||
}
|
||||
|
||||
// testMultiHopRemoteForceCloseOnChainHtlcTimeout tests that if we extend a
|
||||
// multi-hop HTLC, and the final destination of the HTLC force closes the
|
||||
// channel, then we properly timeout the HTLC on *their* commitment transaction
|
||||
// once the timeout has expired. Once we sweep the transaction, we should also
|
||||
// cancel back the initial HTLC.
|
||||
func testMultiHopRemoteForceCloseOnChainHtlcTimeout(net *lntest.NetworkHarness,
|
||||
t *harnessTest) {
|
||||
ctxb := context.Background()
|
||||
|
||||
// First, we'll create a three hop network: Alice -> Bob -> Carol, with
|
||||
// Carol refusing to actually settle or directly cancel any HTLC's
|
||||
// self.
|
||||
aliceChanPoint, bobChanPoint, carol :=
|
||||
createThreeHopNetwork(t, net, true)
|
||||
|
||||
// Clean up carol's node when the test finishes.
|
||||
defer shutdownAndAssert(net, t, carol)
|
||||
|
||||
// With our channels set up, we'll then send a single HTLC from Alice
|
||||
// to Carol. As Carol is in hodl mode, she won't settle this HTLC which
|
||||
// opens up the base for out tests.
|
||||
const (
|
||||
finalCltvDelta = 40
|
||||
htlcAmt = btcutil.Amount(30000)
|
||||
)
|
||||
|
||||
ctx, cancel := context.WithCancel(ctxb)
|
||||
defer cancel()
|
||||
|
||||
alicePayStream, err := net.Alice.SendPayment(ctx)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create payment stream for alice: %v", err)
|
||||
}
|
||||
|
||||
// We'll now send a single HTLC across our multi-hop network.
|
||||
carolPubKey := carol.PubKey[:]
|
||||
payHash := makeFakePayHash(t)
|
||||
err = alicePayStream.Send(&lnrpc.SendRequest{
|
||||
Dest: carolPubKey,
|
||||
Amt: int64(htlcAmt),
|
||||
PaymentHash: payHash,
|
||||
FinalCltvDelta: finalCltvDelta,
|
||||
})
|
||||
if err != nil {
|
||||
t.Fatalf("unable to send alice htlc: %v", err)
|
||||
}
|
||||
|
||||
// Once the HTLC has cleared, all the nodes in our mini network should
|
||||
// show that the HTLC has been locked in.
|
||||
var predErr error
|
||||
nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertActiveHtlcs(nodes, payHash)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("htlc mismatch: %v", predErr)
|
||||
}
|
||||
|
||||
// At this point, we'll now instruct Carol to force close the
|
||||
// transaction. This will let us exercise that Bob is able to sweep the
|
||||
// expired HTLC on Carol's version of the commitment transaction.
|
||||
ctxt, _ := context.WithTimeout(ctxb, channelCloseTimeout)
|
||||
closeChannelAndAssert(ctxt, t, net, carol, bobChanPoint, true)
|
||||
|
||||
// At this point, Bob should have a pending force close channel as
|
||||
// Carol has gone directly to chain.
|
||||
pendingChansRequest := &lnrpc.PendingChannelsRequest{}
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for "+
|
||||
"pending channels: %v", err)
|
||||
return false
|
||||
}
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending " +
|
||||
"force close channels but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf(predErr.Error())
|
||||
}
|
||||
|
||||
// Bob can sweep his output immediately.
|
||||
_, err = waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's funding output sweep tx: %v",
|
||||
err)
|
||||
}
|
||||
|
||||
// Next, we'll mine enough blocks for the HTLC to expire. At this
|
||||
// point, Bob should hand off the output to his internal utxo nursery,
|
||||
// which will broadcast a sweep transaction.
|
||||
numBlocks := padCLTV(finalCltvDelta - 1)
|
||||
if _, err := net.Miner.Node.Generate(numBlocks); err != nil {
|
||||
t.Fatalf("unable to generate blocks: %v", err)
|
||||
}
|
||||
|
||||
// If we check Bob's pending channel report, it should show that he has
|
||||
// a single HTLC that's now in the second stage, as skip the initial
|
||||
// first stage since this is a direct HTLC.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
if len(pendingChanResp.PendingForceClosingChannels) == 0 {
|
||||
predErr = fmt.Errorf("bob should have pending for " +
|
||||
"close chan but doesn't")
|
||||
return false
|
||||
}
|
||||
|
||||
forceCloseChan := pendingChanResp.PendingForceClosingChannels[0]
|
||||
if len(forceCloseChan.PendingHtlcs) != 1 {
|
||||
predErr = fmt.Errorf("bob should have pending htlc " +
|
||||
"but doesn't")
|
||||
return false
|
||||
}
|
||||
if forceCloseChan.PendingHtlcs[0].Stage != 2 {
|
||||
predErr = fmt.Errorf("bob's htlc should have "+
|
||||
"advanced to the second stage: %v", err)
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("bob didn't hand off time-locked HTLC: %v", predErr)
|
||||
}
|
||||
|
||||
// Bob's sweeping transaction should now be found in the mempool at
|
||||
// this point.
|
||||
sweepTx, err := waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
// If Bob's transaction isn't yet in the mempool, then due to
|
||||
// internal message passing and the low period between blocks
|
||||
// being mined, it may have been detected as a late
|
||||
// registration. As a result, we'll mine another block and
|
||||
// repeat the check. If it doesn't go through this time, then
|
||||
// we'll fail.
|
||||
// TODO(halseth): can we use waitForChannelPendingForceClose to
|
||||
// avoid this hack?
|
||||
if _, err := net.Miner.Node.Generate(1); err != nil {
|
||||
t.Fatalf("unable to generate block: %v", err)
|
||||
}
|
||||
sweepTx, err = waitForTxInMempool(net.Miner.Node, minerMempoolTimeout)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to find bob's sweeping transaction: "+
|
||||
"%v", err)
|
||||
}
|
||||
}
|
||||
|
||||
// If we mine an additional block, then this should confirm Bob's
|
||||
// transaction which sweeps the direct HTLC output.
|
||||
block := mineBlocks(t, net, 1, 1)[0]
|
||||
assertTxInBlock(t, block, sweepTx)
|
||||
|
||||
// Now that the sweeping transaction has been confirmed, Bob should
|
||||
// cancel back that HTLC. As a result, Alice should not know of any
|
||||
// active HTLC's.
|
||||
nodes = []*lntest.HarnessNode{net.Alice}
|
||||
err = wait.Predicate(func() bool {
|
||||
predErr = assertNumActiveHtlcs(nodes, 0)
|
||||
if predErr != nil {
|
||||
return false
|
||||
}
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf("alice's channel still has active htlc's: %v", predErr)
|
||||
}
|
||||
|
||||
// Now we'll check Bob's pending channel report. Since this was Carol's
|
||||
// commitment, he doesn't have to wait for any CSV delays. As a result,
|
||||
// he should show no additional pending transactions.
|
||||
err = wait.Predicate(func() bool {
|
||||
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
|
||||
pendingChanResp, err := net.Bob.PendingChannels(
|
||||
ctxt, pendingChansRequest,
|
||||
)
|
||||
if err != nil {
|
||||
predErr = fmt.Errorf("unable to query for pending "+
|
||||
"channels: %v", err)
|
||||
return false
|
||||
}
|
||||
if len(pendingChanResp.PendingForceClosingChannels) != 0 {
|
||||
predErr = fmt.Errorf("bob still has pending channels "+
|
||||
"but shouldn't: %v", spew.Sdump(pendingChanResp))
|
||||
return false
|
||||
}
|
||||
|
||||
return true
|
||||
}, time.Second*15)
|
||||
if err != nil {
|
||||
t.Fatalf(predErr.Error())
|
||||
}
|
||||
|
||||
// We'll close out the test by closing the channel from Alice to Bob,
|
||||
// and then shutting down the new node we created as its no longer
|
||||
// needed.
|
||||
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
|
||||
closeChannelAndAssert(ctxt, t, net, net.Alice, aliceChanPoint, false)
|
||||
}
|
||||
|
||||
// testSwitchCircuitPersistence creates a multihop network to ensure the sender
|
||||
// and intermediaries are persisting their open payment circuits. After
|
||||
// forwarding a packet via an outgoing link, all are restarted, and expected to
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user