lnd.xprv/lntest/itest/lnd_switch_test.go

1193 lines
41 KiB
Go
Raw Normal View History

package itest
import (
"context"
"time"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lntest"
"github.com/lightningnetwork/lnd/lntest/wait"
)
// 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
// forward a response back from the receiver once back online.
//
// The general flow of this test:
// 1. Carol --> Dave --> Alice --> Bob forward payment
// 2. X X X Bob restart sender and intermediaries
// 3. Carol <-- Dave <-- Alice <-- Bob expect settle to propagate
func testSwitchCircuitPersistence(net *lntest.NetworkHarness, t *harnessTest) {
ctxb := context.Background()
const chanAmt = btcutil.Amount(1000000)
const pushAmt = btcutil.Amount(900000)
var networkChans []*lnrpc.ChannelPoint
// Open a channel with 100k satoshis between Alice and Bob with Alice
// being the sole funder of the channel.
ctxt, _ := context.WithTimeout(ctxb, channelOpenTimeout)
chanPointAlice := openChannelAndAssert(
ctxt, t, net, net.Alice, net.Bob,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointAlice)
aliceChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointAlice)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
aliceFundPoint := wire.OutPoint{
Hash: *aliceChanTXID,
Index: chanPointAlice.OutputIndex,
}
// As preliminary setup, we'll create two new nodes: Carol and Dave,
// such that we now have a 4 ndoe, 3 channel topology. Dave will make
// a channel with Alice, and Carol with Dave. After this setup, the
// network topology should now look like:
// Carol -> Dave -> Alice -> Bob
//
// First, we'll create Dave and establish a channel to Alice.
dave := net.NewNode(t.t, "Dave", nil)
defer shutdownAndAssert(net, t, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, dave, net.Alice)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.SendCoins(ctxt, t.t, btcutil.SatoshiPerBitcoin, dave)
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
chanPointDave := openChannelAndAssert(
ctxt, t, net, dave, net.Alice,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointDave)
daveChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointDave)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
daveFundPoint := wire.OutPoint{
Hash: *daveChanTXID,
Index: chanPointDave.OutputIndex,
}
// Next, we'll create Carol and establish a channel to from her to
// Dave. Carol is started in htlchodl mode so that we can disconnect the
// intermediary hops before starting the settle.
carol := net.NewNode(t.t, "Carol", []string{"--hodl.exit-settle"})
defer shutdownAndAssert(net, t, carol)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, carol, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.SendCoins(ctxt, t.t, btcutil.SatoshiPerBitcoin, carol)
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
chanPointCarol := openChannelAndAssert(
ctxt, t, net, carol, dave,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointCarol)
carolChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointCarol)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
carolFundPoint := wire.OutPoint{
Hash: *carolChanTXID,
Index: chanPointCarol.OutputIndex,
}
// Wait for all nodes to have seen all channels.
nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol, dave}
nodeNames := []string{"Alice", "Bob", "Carol", "Dave"}
for _, chanPoint := range networkChans {
for i, node := range nodes {
txid, err := lnrpc.GetChanPointFundingTxid(chanPoint)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
point := wire.OutPoint{
Hash: *txid,
Index: chanPoint.OutputIndex,
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = node.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("%s(%d): timeout waiting for "+
"channel(%s) open: %v", nodeNames[i],
node.NodeID, point, err)
}
}
}
// Create 5 invoices for Carol, which expect a payment from Bob for 1k
// satoshis with a different preimage each time.
const numPayments = 5
const paymentAmt = 1000
payReqs, _, _, err := createPayReqs(
carol, paymentAmt, numPayments,
)
if err != nil {
t.Fatalf("unable to create pay reqs: %v", err)
}
// We'll wait for all parties to recognize the new channels within the
// network.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = dave.WaitForNetworkChannelOpen(ctxt, chanPointDave)
if err != nil {
t.Fatalf("dave didn't advertise his channel: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = carol.WaitForNetworkChannelOpen(ctxt, chanPointCarol)
if err != nil {
t.Fatalf("carol didn't advertise her channel in time: %v",
err)
}
time.Sleep(time.Millisecond * 50)
// Using Carol as the source, pay to the 5 invoices from Bob created
// above.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = completePaymentRequests(
ctxt, net.Bob, net.Bob.RouterClient, payReqs, false,
)
if err != nil {
t.Fatalf("unable to send payments: %v", err)
}
// Wait until all nodes in the network have 5 outstanding htlcs.
var predErr error
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(nodes, numPayments)
2021-06-29 00:10:16 +03:00
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// Restart the intermediaries and the sender.
if err := net.RestartNode(dave, nil); err != nil {
t.Fatalf("Node restart failed: %v", err)
}
if err := net.RestartNode(net.Alice, nil); err != nil {
t.Fatalf("Node restart failed: %v", err)
}
if err := net.RestartNode(net.Bob, nil); err != nil {
t.Fatalf("Node restart failed: %v", err)
}
// Ensure all of the intermediate links are reconnected.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.EnsureConnected(ctxt, t.t, net.Alice, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.EnsureConnected(ctxt, t.t, net.Bob, net.Alice)
// Ensure all nodes in the network still have 5 outstanding htlcs.
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(nodes, numPayments)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// Now restart carol without hodl mode, to settle back the outstanding
// payments.
carol.SetExtraArgs(nil)
if err := net.RestartNode(carol, nil); err != nil {
t.Fatalf("Node restart failed: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.EnsureConnected(ctxt, t.t, dave, carol)
// After the payments settle, there should be no active htlcs on any of
// the nodes in the network.
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(nodes, 0)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// When asserting the amount of satoshis moved, we'll factor in the
// default base fee, as we didn't modify the fee structure when
// creating the seed nodes in the network.
const baseFee = 1
// At this point all the channels within our proto network should be
// shifted by 5k satoshis in the direction of Carol, the sink within the
// payment flow generated above. The order of asserts corresponds to
// increasing of time is needed to embed the HTLC in commitment
// transaction, in channel Bob->Alice->David->Carol, order is Carol,
// David, Alice, Bob.
var amountPaid = int64(5000)
assertAmountPaid(t, "Dave(local) => Carol(remote)", carol,
carolFundPoint, int64(0), amountPaid)
assertAmountPaid(t, "Dave(local) => Carol(remote)", dave,
carolFundPoint, amountPaid, int64(0))
assertAmountPaid(t, "Alice(local) => Dave(remote)", dave,
daveFundPoint, int64(0), amountPaid+(baseFee*numPayments))
assertAmountPaid(t, "Alice(local) => Dave(remote)", net.Alice,
daveFundPoint, amountPaid+(baseFee*numPayments), int64(0))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Alice,
aliceFundPoint, int64(0), amountPaid+((baseFee*numPayments)*2))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Bob,
aliceFundPoint, amountPaid+(baseFee*numPayments)*2, int64(0))
// Lastly, we will send one more payment to ensure all channels are
// still functioning properly.
finalInvoice := &lnrpc.Invoice{
Memo: "testing",
Value: paymentAmt,
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
resp, err := carol.AddInvoice(ctxt, finalInvoice)
if err != nil {
t.Fatalf("unable to add invoice: %v", err)
}
payReqs = []string{resp.PaymentRequest}
// Using Carol as the source, pay to the 5 invoices from Bob created
// above.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = completePaymentRequests(
ctxt, net.Bob, net.Bob.RouterClient, payReqs, true,
)
if err != nil {
t.Fatalf("unable to send payments: %v", err)
}
amountPaid = int64(6000)
assertAmountPaid(t, "Dave(local) => Carol(remote)", carol,
carolFundPoint, int64(0), amountPaid)
assertAmountPaid(t, "Dave(local) => Carol(remote)", dave,
carolFundPoint, amountPaid, int64(0))
assertAmountPaid(t, "Alice(local) => Dave(remote)", dave,
daveFundPoint, int64(0), amountPaid+(baseFee*(numPayments+1)))
assertAmountPaid(t, "Alice(local) => Dave(remote)", net.Alice,
daveFundPoint, amountPaid+(baseFee*(numPayments+1)), int64(0))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Alice,
aliceFundPoint, int64(0), amountPaid+((baseFee*(numPayments+1))*2))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Bob,
aliceFundPoint, amountPaid+(baseFee*(numPayments+1))*2, int64(0))
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPointAlice, false)
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, dave, chanPointDave, false)
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, carol, chanPointCarol, false)
}
// testSwitchOfflineDelivery constructs a set of multihop payments, and tests
// that the returning payments are not lost if a peer on the backwards path is
// offline when the settle/fails are received. We expect the payments to be
// buffered in memory, and transmitted as soon as the disconnect link comes back
// online.
//
// The general flow of this test:
// 1. Carol --> Dave --> Alice --> Bob forward payment
// 2. Carol --- Dave X Alice --- Bob disconnect intermediaries
// 3. Carol --- Dave X Alice <-- Bob settle last hop
// 4. Carol <-- Dave <-- Alice --- Bob reconnect, expect settle to propagate
func testSwitchOfflineDelivery(net *lntest.NetworkHarness, t *harnessTest) {
ctxb := context.Background()
const chanAmt = btcutil.Amount(1000000)
const pushAmt = btcutil.Amount(900000)
var networkChans []*lnrpc.ChannelPoint
// Open a channel with 100k satoshis between Alice and Bob with Alice
// being the sole funder of the channel.
ctxt, _ := context.WithTimeout(ctxb, channelOpenTimeout)
chanPointAlice := openChannelAndAssert(
ctxt, t, net, net.Alice, net.Bob,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointAlice)
aliceChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointAlice)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
aliceFundPoint := wire.OutPoint{
Hash: *aliceChanTXID,
Index: chanPointAlice.OutputIndex,
}
// As preliminary setup, we'll create two new nodes: Carol and Dave,
// such that we now have a 4 ndoe, 3 channel topology. Dave will make
// a channel with Alice, and Carol with Dave. After this setup, the
// network topology should now look like:
// Carol -> Dave -> Alice -> Bob
//
// First, we'll create Dave and establish a channel to Alice.
dave := net.NewNode(t.t, "Dave", nil)
defer shutdownAndAssert(net, t, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, dave, net.Alice)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.SendCoins(ctxt, t.t, btcutil.SatoshiPerBitcoin, dave)
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
chanPointDave := openChannelAndAssert(
ctxt, t, net, dave, net.Alice,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointDave)
daveChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointDave)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
daveFundPoint := wire.OutPoint{
Hash: *daveChanTXID,
Index: chanPointDave.OutputIndex,
}
// Next, we'll create Carol and establish a channel to from her to
// Dave. Carol is started in htlchodl mode so that we can disconnect the
// intermediary hops before starting the settle.
carol := net.NewNode(t.t, "Carol", []string{"--hodl.exit-settle"})
defer shutdownAndAssert(net, t, carol)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, carol, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.SendCoins(ctxt, t.t, btcutil.SatoshiPerBitcoin, carol)
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
chanPointCarol := openChannelAndAssert(
ctxt, t, net, carol, dave,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointCarol)
carolChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointCarol)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
carolFundPoint := wire.OutPoint{
Hash: *carolChanTXID,
Index: chanPointCarol.OutputIndex,
}
// Wait for all nodes to have seen all channels.
nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol, dave}
nodeNames := []string{"Alice", "Bob", "Carol", "Dave"}
for _, chanPoint := range networkChans {
for i, node := range nodes {
txid, err := lnrpc.GetChanPointFundingTxid(chanPoint)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
point := wire.OutPoint{
Hash: *txid,
Index: chanPoint.OutputIndex,
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = node.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("%s(%d): timeout waiting for "+
"channel(%s) open: %v", nodeNames[i],
node.NodeID, point, err)
}
}
}
// Create 5 invoices for Carol, which expect a payment from Bob for 1k
// satoshis with a different preimage each time.
const numPayments = 5
const paymentAmt = 1000
payReqs, _, _, err := createPayReqs(
carol, paymentAmt, numPayments,
)
if err != nil {
t.Fatalf("unable to create pay reqs: %v", err)
}
// We'll wait for all parties to recognize the new channels within the
// network.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = dave.WaitForNetworkChannelOpen(ctxt, chanPointDave)
if err != nil {
t.Fatalf("dave didn't advertise his channel: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = carol.WaitForNetworkChannelOpen(ctxt, chanPointCarol)
if err != nil {
t.Fatalf("carol didn't advertise her channel in time: %v",
err)
}
// Make sure all nodes are fully synced before we continue.
ctxt, cancel := context.WithTimeout(ctxb, defaultTimeout)
defer cancel()
for _, node := range nodes {
err := node.WaitForBlockchainSync(ctxt)
if err != nil {
t.Fatalf("unable to wait for sync: %v", err)
}
}
// Using Carol as the source, pay to the 5 invoices from Bob created
// above.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = completePaymentRequests(
ctxt, net.Bob, net.Bob.RouterClient, payReqs, false,
)
if err != nil {
t.Fatalf("unable to send payments: %v", err)
}
// Wait for all of the payments to reach Carol.
var predErr error
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(nodes, numPayments)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// First, disconnect Dave and Alice so that their link is broken.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
if err := net.DisconnectNodes(ctxt, dave, net.Alice); err != nil {
t.Fatalf("unable to disconnect alice from dave: %v", err)
}
// Then, reconnect them to ensure Dave doesn't just fail back the htlc.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, dave, net.Alice)
// Wait to ensure that the payment remain are not failed back after
// reconnecting. All node should report the number payments initiated
// for the duration of the interval.
err = wait.Invariant(func() bool {
predErr = assertNumActiveHtlcs(nodes, numPayments)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc change: %v", predErr)
}
// Now, disconnect Dave from Alice again before settling back the
// payment.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
if err := net.DisconnectNodes(ctxt, dave, net.Alice); err != nil {
t.Fatalf("unable to disconnect alice from dave: %v", err)
}
// Now restart carol without hodl mode, to settle back the outstanding
// payments.
carol.SetExtraArgs(nil)
if err := net.RestartNode(carol, nil); err != nil {
t.Fatalf("Node restart failed: %v", err)
}
// Wait for Carol to report no outstanding htlcs.
carolNode := []*lntest.HarnessNode{carol}
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(carolNode, 0)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// Make sure all nodes are fully synced again.
ctxt, cancel = context.WithTimeout(ctxb, defaultTimeout)
defer cancel()
for _, node := range nodes {
err := node.WaitForBlockchainSync(ctxt)
if err != nil {
t.Fatalf("unable to wait for sync: %v", err)
}
}
// Now that the settles have reached Dave, reconnect him with Alice,
// allowing the settles to return to the sender.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.EnsureConnected(ctxt, t.t, dave, net.Alice)
// Wait until all outstanding htlcs in the network have been settled.
err = wait.Predicate(func() bool {
return assertNumActiveHtlcs(nodes, 0) == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// When asserting the amount of satoshis moved, we'll factor in the
// default base fee, as we didn't modify the fee structure when
// creating the seed nodes in the network.
const baseFee = 1
// At this point all the channels within our proto network should be
// shifted by 5k satoshis in the direction of Carol, the sink within the
// payment flow generated above. The order of asserts corresponds to
// increasing of time is needed to embed the HTLC in commitment
// transaction, in channel Bob->Alice->David->Carol, order is Carol,
// David, Alice, Bob.
var amountPaid = int64(5000)
assertAmountPaid(t, "Dave(local) => Carol(remote)", carol,
carolFundPoint, int64(0), amountPaid)
assertAmountPaid(t, "Dave(local) => Carol(remote)", dave,
carolFundPoint, amountPaid, int64(0))
assertAmountPaid(t, "Alice(local) => Dave(remote)", dave,
daveFundPoint, int64(0), amountPaid+(baseFee*numPayments))
assertAmountPaid(t, "Alice(local) => Dave(remote)", net.Alice,
daveFundPoint, amountPaid+(baseFee*numPayments), int64(0))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Alice,
aliceFundPoint, int64(0), amountPaid+((baseFee*numPayments)*2))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Bob,
aliceFundPoint, amountPaid+(baseFee*numPayments)*2, int64(0))
// Lastly, we will send one more payment to ensure all channels are
// still functioning properly.
finalInvoice := &lnrpc.Invoice{
Memo: "testing",
Value: paymentAmt,
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
resp, err := carol.AddInvoice(ctxt, finalInvoice)
if err != nil {
t.Fatalf("unable to add invoice: %v", err)
}
payReqs = []string{resp.PaymentRequest}
// Using Carol as the source, pay to the 5 invoices from Bob created
// above.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = completePaymentRequests(
ctxt, net.Bob, net.Bob.RouterClient, payReqs, true,
)
if err != nil {
t.Fatalf("unable to send payments: %v", err)
}
amountPaid = int64(6000)
assertAmountPaid(t, "Dave(local) => Carol(remote)", carol,
carolFundPoint, int64(0), amountPaid)
assertAmountPaid(t, "Dave(local) => Carol(remote)", dave,
carolFundPoint, amountPaid, int64(0))
assertAmountPaid(t, "Alice(local) => Dave(remote)", dave,
daveFundPoint, int64(0), amountPaid+(baseFee*(numPayments+1)))
assertAmountPaid(t, "Alice(local) => Dave(remote)", net.Alice,
daveFundPoint, amountPaid+(baseFee*(numPayments+1)), int64(0))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Alice,
aliceFundPoint, int64(0), amountPaid+((baseFee*(numPayments+1))*2))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Bob,
aliceFundPoint, amountPaid+(baseFee*(numPayments+1))*2, int64(0))
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPointAlice, false)
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, dave, chanPointDave, false)
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, carol, chanPointCarol, false)
}
// testSwitchOfflineDeliveryPersistence constructs a set of multihop payments,
// and tests that the returning payments are not lost if a peer on the backwards
// path is offline when the settle/fails are received AND the peer buffering the
// responses is completely restarts. We expect the payments to be reloaded from
// disk, and transmitted as soon as the intermediaries are reconnected.
//
// The general flow of this test:
// 1. Carol --> Dave --> Alice --> Bob forward payment
// 2. Carol --- Dave X Alice --- Bob disconnect intermediaries
// 3. Carol --- Dave X Alice <-- Bob settle last hop
// 4. Carol --- Dave X X Bob restart Alice
// 5. Carol <-- Dave <-- Alice --- Bob expect settle to propagate
func testSwitchOfflineDeliveryPersistence(net *lntest.NetworkHarness, t *harnessTest) {
ctxb := context.Background()
const chanAmt = btcutil.Amount(1000000)
const pushAmt = btcutil.Amount(900000)
var networkChans []*lnrpc.ChannelPoint
// Open a channel with 100k satoshis between Alice and Bob with Alice
// being the sole funder of the channel.
ctxt, _ := context.WithTimeout(ctxb, channelOpenTimeout)
chanPointAlice := openChannelAndAssert(
ctxt, t, net, net.Alice, net.Bob,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointAlice)
aliceChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointAlice)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
aliceFundPoint := wire.OutPoint{
Hash: *aliceChanTXID,
Index: chanPointAlice.OutputIndex,
}
// As preliminary setup, we'll create two new nodes: Carol and Dave,
// such that we now have a 4 ndoe, 3 channel topology. Dave will make
// a channel with Alice, and Carol with Dave. After this setup, the
// network topology should now look like:
// Carol -> Dave -> Alice -> Bob
//
// First, we'll create Dave and establish a channel to Alice.
dave := net.NewNode(t.t, "Dave", nil)
defer shutdownAndAssert(net, t, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, dave, net.Alice)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.SendCoins(ctxt, t.t, btcutil.SatoshiPerBitcoin, dave)
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
chanPointDave := openChannelAndAssert(
ctxt, t, net, dave, net.Alice,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointDave)
daveChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointDave)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
daveFundPoint := wire.OutPoint{
Hash: *daveChanTXID,
Index: chanPointDave.OutputIndex,
}
// Next, we'll create Carol and establish a channel to from her to
// Dave. Carol is started in htlchodl mode so that we can disconnect the
// intermediary hops before starting the settle.
carol := net.NewNode(t.t, "Carol", []string{"--hodl.exit-settle"})
defer shutdownAndAssert(net, t, carol)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, carol, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.SendCoins(ctxt, t.t, btcutil.SatoshiPerBitcoin, carol)
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
chanPointCarol := openChannelAndAssert(
ctxt, t, net, carol, dave,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointCarol)
carolChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointCarol)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
carolFundPoint := wire.OutPoint{
Hash: *carolChanTXID,
Index: chanPointCarol.OutputIndex,
}
// Wait for all nodes to have seen all channels.
nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol, dave}
nodeNames := []string{"Alice", "Bob", "Carol", "Dave"}
for _, chanPoint := range networkChans {
for i, node := range nodes {
txid, err := lnrpc.GetChanPointFundingTxid(chanPoint)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
point := wire.OutPoint{
Hash: *txid,
Index: chanPoint.OutputIndex,
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = node.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("%s(%d): timeout waiting for "+
"channel(%s) open: %v", nodeNames[i],
node.NodeID, point, err)
}
}
}
// Create 5 invoices for Carol, which expect a payment from Bob for 1k
// satoshis with a different preimage each time.
const numPayments = 5
const paymentAmt = 1000
payReqs, _, _, err := createPayReqs(
carol, paymentAmt, numPayments,
)
if err != nil {
t.Fatalf("unable to create pay reqs: %v", err)
}
// We'll wait for all parties to recognize the new channels within the
// network.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = dave.WaitForNetworkChannelOpen(ctxt, chanPointDave)
if err != nil {
t.Fatalf("dave didn't advertise his channel: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = carol.WaitForNetworkChannelOpen(ctxt, chanPointCarol)
if err != nil {
t.Fatalf("carol didn't advertise her channel in time: %v",
err)
}
// Using Carol as the source, pay to the 5 invoices from Bob created
// above.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = completePaymentRequests(
ctxt, net.Bob, net.Bob.RouterClient, payReqs, false,
)
if err != nil {
t.Fatalf("unable to send payments: %v", err)
}
var predErr error
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(nodes, numPayments)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// Disconnect the two intermediaries, Alice and Dave, by shutting down
// Alice.
if err := net.StopNode(net.Alice); err != nil {
t.Fatalf("unable to shutdown alice: %v", err)
}
// Now restart carol without hodl mode, to settle back the outstanding
// payments.
carol.SetExtraArgs(nil)
if err := net.RestartNode(carol, nil); err != nil {
t.Fatalf("Node restart failed: %v", err)
}
// Make Carol and Dave are reconnected before waiting for the htlcs to
// clear.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.EnsureConnected(ctxt, t.t, dave, carol)
// Wait for Carol to report no outstanding htlcs, and also for Dav to
// receive all the settles from Carol.
carolNode := []*lntest.HarnessNode{carol}
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(carolNode, 0)
if predErr != nil {
return false
}
predErr = assertNumActiveHtlcsChanPoint(dave, carolFundPoint, 0)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// Finally, restart dave who received the settles, but was unable to
// deliver them to Alice since they were disconnected.
if err := net.RestartNode(dave, nil); err != nil {
t.Fatalf("unable to restart dave: %v", err)
}
if err = net.RestartNode(net.Alice, nil); err != nil {
t.Fatalf("unable to restart alice: %v", err)
}
// Force Dave and Alice to reconnect before waiting for the htlcs to
// clear.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.EnsureConnected(ctxt, t.t, dave, net.Alice)
// After reconnection succeeds, the settles should be propagated all
// the way back to the sender. All nodes should report no active htlcs.
err = wait.Predicate(func() bool {
return assertNumActiveHtlcs(nodes, 0) == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// When asserting the amount of satoshis moved, we'll factor in the
// default base fee, as we didn't modify the fee structure when
// creating the seed nodes in the network.
const baseFee = 1
// At this point all the channels within our proto network should be
// shifted by 5k satoshis in the direction of Carol, the sink within the
// payment flow generated above. The order of asserts corresponds to
// increasing of time is needed to embed the HTLC in commitment
// transaction, in channel Bob->Alice->David->Carol, order is Carol,
// David, Alice, Bob.
var amountPaid = int64(5000)
assertAmountPaid(t, "Dave(local) => Carol(remote)", carol,
carolFundPoint, int64(0), amountPaid)
assertAmountPaid(t, "Dave(local) => Carol(remote)", dave,
carolFundPoint, amountPaid, int64(0))
assertAmountPaid(t, "Alice(local) => Dave(remote)", dave,
daveFundPoint, int64(0), amountPaid+(baseFee*numPayments))
assertAmountPaid(t, "Alice(local) => Dave(remote)", net.Alice,
daveFundPoint, amountPaid+(baseFee*numPayments), int64(0))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Alice,
aliceFundPoint, int64(0), amountPaid+((baseFee*numPayments)*2))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Bob,
aliceFundPoint, amountPaid+(baseFee*numPayments)*2, int64(0))
// Lastly, we will send one more payment to ensure all channels are
// still functioning properly.
finalInvoice := &lnrpc.Invoice{
Memo: "testing",
Value: paymentAmt,
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
resp, err := carol.AddInvoice(ctxt, finalInvoice)
if err != nil {
t.Fatalf("unable to add invoice: %v", err)
}
payReqs = []string{resp.PaymentRequest}
// Before completing the final payment request, ensure that the
// connection between Dave and Carol has been healed.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.EnsureConnected(ctxt, t.t, dave, carol)
// Using Carol as the source, pay to the 5 invoices from Bob created
// above.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = completePaymentRequests(
ctxt, net.Bob, net.Bob.RouterClient, payReqs, true,
)
if err != nil {
t.Fatalf("unable to send payments: %v", err)
}
amountPaid = int64(6000)
assertAmountPaid(t, "Dave(local) => Carol(remote)", carol,
carolFundPoint, int64(0), amountPaid)
assertAmountPaid(t, "Dave(local) => Carol(remote)", dave,
carolFundPoint, amountPaid, int64(0))
assertAmountPaid(t, "Alice(local) => Dave(remote)", dave,
daveFundPoint, int64(0), amountPaid+(baseFee*(numPayments+1)))
assertAmountPaid(t, "Alice(local) => Dave(remote)", net.Alice,
daveFundPoint, amountPaid+(baseFee*(numPayments+1)), int64(0))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Alice,
aliceFundPoint, int64(0), amountPaid+((baseFee*(numPayments+1))*2))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Bob,
aliceFundPoint, amountPaid+(baseFee*(numPayments+1))*2, int64(0))
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPointAlice, false)
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, dave, chanPointDave, false)
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, carol, chanPointCarol, false)
}
// testSwitchOfflineDeliveryOutgoingOffline constructs a set of multihop payments,
// and tests that the returning payments are not lost if a peer on the backwards
// path is offline when the settle/fails are received AND the peer buffering the
// responses is completely restarts. We expect the payments to be reloaded from
// disk, and transmitted as soon as the intermediaries are reconnected.
//
// The general flow of this test:
// 1. Carol --> Dave --> Alice --> Bob forward payment
// 2. Carol --- Dave X Alice --- Bob disconnect intermediaries
// 3. Carol --- Dave X Alice <-- Bob settle last hop
// 4. Carol --- Dave X X shutdown Bob, restart Alice
// 5. Carol <-- Dave <-- Alice X expect settle to propagate
func testSwitchOfflineDeliveryOutgoingOffline(
net *lntest.NetworkHarness, t *harnessTest) {
ctxb := context.Background()
const chanAmt = btcutil.Amount(1000000)
const pushAmt = btcutil.Amount(900000)
var networkChans []*lnrpc.ChannelPoint
// Open a channel with 100k satoshis between Alice and Bob with Alice
// being the sole funder of the channel.
ctxt, _ := context.WithTimeout(ctxb, channelOpenTimeout)
chanPointAlice := openChannelAndAssert(
ctxt, t, net, net.Alice, net.Bob,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointAlice)
aliceChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointAlice)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
aliceFundPoint := wire.OutPoint{
Hash: *aliceChanTXID,
Index: chanPointAlice.OutputIndex,
}
// As preliminary setup, we'll create two new nodes: Carol and Dave,
// such that we now have a 4 ndoe, 3 channel topology. Dave will make
// a channel with Alice, and Carol with Dave. After this setup, the
// network topology should now look like:
// Carol -> Dave -> Alice -> Bob
//
// First, we'll create Dave and establish a channel to Alice.
dave := net.NewNode(t.t, "Dave", nil)
defer shutdownAndAssert(net, t, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, dave, net.Alice)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.SendCoins(ctxt, t.t, btcutil.SatoshiPerBitcoin, dave)
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
chanPointDave := openChannelAndAssert(
ctxt, t, net, dave, net.Alice,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointDave)
daveChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointDave)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
daveFundPoint := wire.OutPoint{
Hash: *daveChanTXID,
Index: chanPointDave.OutputIndex,
}
// Next, we'll create Carol and establish a channel to from her to
// Dave. Carol is started in htlchodl mode so that we can disconnect the
// intermediary hops before starting the settle.
carol := net.NewNode(t.t, "Carol", []string{"--hodl.exit-settle"})
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.ConnectNodes(ctxt, t.t, carol, dave)
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.SendCoins(ctxt, t.t, btcutil.SatoshiPerBitcoin, carol)
ctxt, _ = context.WithTimeout(ctxb, channelOpenTimeout)
chanPointCarol := openChannelAndAssert(
ctxt, t, net, carol, dave,
lntest.OpenChannelParams{
Amt: chanAmt,
PushAmt: pushAmt,
},
)
networkChans = append(networkChans, chanPointCarol)
carolChanTXID, err := lnrpc.GetChanPointFundingTxid(chanPointCarol)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
carolFundPoint := wire.OutPoint{
Hash: *carolChanTXID,
Index: chanPointCarol.OutputIndex,
}
// Wait for all nodes to have seen all channels.
nodes := []*lntest.HarnessNode{net.Alice, net.Bob, carol, dave}
nodeNames := []string{"Alice", "Bob", "Carol", "Dave"}
for _, chanPoint := range networkChans {
for i, node := range nodes {
txid, err := lnrpc.GetChanPointFundingTxid(chanPoint)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
point := wire.OutPoint{
Hash: *txid,
Index: chanPoint.OutputIndex,
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = node.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("%s(%d): timeout waiting for "+
"channel(%s) open: %v", nodeNames[i],
node.NodeID, point, err)
}
}
}
// Create 5 invoices for Carol, which expect a payment from Bob for 1k
// satoshis with a different preimage each time.
const numPayments = 5
const paymentAmt = 1000
payReqs, _, _, err := createPayReqs(
carol, paymentAmt, numPayments,
)
if err != nil {
t.Fatalf("unable to create pay reqs: %v", err)
}
// We'll wait for all parties to recognize the new channels within the
// network.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = dave.WaitForNetworkChannelOpen(ctxt, chanPointDave)
if err != nil {
t.Fatalf("dave didn't advertise his channel: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = carol.WaitForNetworkChannelOpen(ctxt, chanPointCarol)
if err != nil {
t.Fatalf("carol didn't advertise her channel in time: %v",
err)
}
// Using Carol as the source, pay to the 5 invoices from Bob created
// above.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = completePaymentRequests(
ctxt, net.Bob, net.Bob.RouterClient, payReqs, false,
)
if err != nil {
t.Fatalf("unable to send payments: %v", err)
}
// Wait for all payments to reach Carol.
var predErr error
err = wait.Predicate(func() bool {
return assertNumActiveHtlcs(nodes, numPayments) == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// Disconnect the two intermediaries, Alice and Dave, so that when carol
// restarts, the response will be held by Dave.
if err := net.StopNode(net.Alice); err != nil {
t.Fatalf("unable to shutdown alice: %v", err)
}
// Now restart carol without hodl mode, to settle back the outstanding
// payments.
carol.SetExtraArgs(nil)
if err := net.RestartNode(carol, nil); err != nil {
t.Fatalf("Node restart failed: %v", err)
}
// Wait for Carol to report no outstanding htlcs.
carolNode := []*lntest.HarnessNode{carol}
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(carolNode, 0)
if predErr != nil {
return false
}
predErr = assertNumActiveHtlcsChanPoint(dave, carolFundPoint, 0)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// Now check that the total amount was transferred from Dave to Carol.
// The amount transferred should be exactly equal to the invoice total
// payment amount, 5k satsohis.
const amountPaid = int64(5000)
assertAmountPaid(t, "Dave(local) => Carol(remote)", carol,
carolFundPoint, int64(0), amountPaid)
assertAmountPaid(t, "Dave(local) => Carol(remote)", dave,
carolFundPoint, amountPaid, int64(0))
// Shutdown carol and leave her offline for the rest of the test. This
// is critical, as we wish to see if Dave can propragate settles even if
// the outgoing link is never revived.
shutdownAndAssert(net, t, carol)
// Now restart Dave, ensuring he is both persisting the settles, and is
// able to reforward them to Alice after recovering from a restart.
if err := net.RestartNode(dave, nil); err != nil {
t.Fatalf("unable to restart dave: %v", err)
}
if err = net.RestartNode(net.Alice, nil); err != nil {
t.Fatalf("unable to restart alice: %v", err)
}
// Ensure that Dave is reconnected to Alice before waiting for the
// htlcs to clear.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
net.EnsureConnected(ctxt, t.t, dave, net.Alice)
// Since Carol has been shutdown permanently, we will wait until all
// other nodes in the network report no active htlcs.
nodesMinusCarol := []*lntest.HarnessNode{net.Bob, net.Alice, dave}
err = wait.Predicate(func() bool {
predErr = assertNumActiveHtlcs(nodesMinusCarol, 0)
return predErr == nil
}, defaultTimeout)
if err != nil {
t.Fatalf("htlc mismatch: %v", predErr)
}
// When asserting the amount of satoshis moved, we'll factor in the
// default base fee, as we didn't modify the fee structure when
// creating the seed nodes in the network.
const baseFee = 1
// At this point, all channels (minus Carol, who is shutdown) should
// show a shift of 5k satoshis towards Carol. The order of asserts
// corresponds to increasing of time is needed to embed the HTLC in
// commitment transaction, in channel Bob->Alice->David, order is
// David, Alice, Bob.
assertAmountPaid(t, "Alice(local) => Dave(remote)", dave,
daveFundPoint, int64(0), amountPaid+(baseFee*numPayments))
assertAmountPaid(t, "Alice(local) => Dave(remote)", net.Alice,
daveFundPoint, amountPaid+(baseFee*numPayments), int64(0))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Alice,
aliceFundPoint, int64(0), amountPaid+((baseFee*numPayments)*2))
assertAmountPaid(t, "Bob(local) => Alice(remote)", net.Bob,
aliceFundPoint, amountPaid+(baseFee*numPayments)*2, int64(0))
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPointAlice, false)
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, dave, chanPointDave, false)
}