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// +build rpctest
package main
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
&q
7292
uot;strings"
"testing"
"time"
"sync/atomic"
"encoding/hex"
"reflect"
"crypto/rand"
prand "math/rand"
"github.com/btcsuite/btclog"
"github.com/davecgh/go-spew/spew"
"github.com/go-errors/errors"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lntest"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/roasbeef/btcd/chaincfg"
"github.com/roasbeef/btcd/chaincfg/chainhash"
"github.com/roasbeef/btcd/integration/rpctest"
"github.com/roasbeef/btcd/rpcclient"
"github.com/roasbeef/btcd/wire"
"github.com/roasbeef/btcutil"
"golang.org/x/net/context"
"google.golang.org/grpc"
)
var (
harnessNetParams = &chaincfg.SimNetParams
)
// harnessTest wraps a regular testing.T providing enhanced error detection
// and propagation. All error will be augmented with a full stack-trace in
// order to aid in debugging. Additionally, any panics caused by active
// test cases will also be handled and represented as fatals.
type harnessTest struct {
t *testing.T
// testCase is populated during test execution and represents the
// current test case.
testCase *testCase
}
// newHarnessTest creates a new instance of a harnessTest from a regular
// testing.T instance.
func newHarnessTest(t *testing.T) *harnessTest {
return &harnessTest{t, nil}
}
// Fatalf causes the current active test case to fail with a fatal error. All
// integration tests should mark test failures solely with this method due to
// the error stack traces it produces.
func (h *harnessTest) Fatalf(format string, a ...interface{}) {
stacktrace := errors.Wrap(fmt.Sprintf(format, a...), 1).ErrorStack()
if h.testCase != nil {
h.t.Fatalf("Failed: (%v): exited with error: \n"+
"%v", h.testCase.name, stacktrace)
} else {
h.t.Fatalf("Error outside of test: %v", stacktrace)
}
}
// RunTestCase executes a harness test case. Any errors or panics will be
// represented as fatal.
func (h *harnessTest) RunTestCase(testCase *testCase,
net *lntest.NetworkHarness) {
h.testCase = testCase
defer func() {
h.testCase = nil
}()
defer func() {
if err := recover(); err != nil {
description := errors.Wrap(err, 2).ErrorStack()
h.t.Fatalf("Failed: (%v) panicked with: \n%v",
h.testCase.name, description)
}
}()
testCase.test(net, h)
return
}
func (h *harnessTest) Logf(format string, args ...interface{}) {
h.t.Logf(format, args...)
}
func (h *harnessTest) Log(args ...interface{}) {
h.t.Log(args...)
}
func assertTxInBlock(t *harnessTest, block *wire.MsgBlock, txid *chainhash.Hash) {
for _, tx := range block.Transactions {
sha := tx.TxHash()
if bytes.Equal(txid[:], sha[:]) {
return
}
}
t.Fatalf("funding tx was not included in block")
}
// mineBlocks mine 'num' of blocks and check that blocks are present in
// node blockchain.
func mineBlocks(t *harnessTest, net *lntest.NetworkHarness, num uint32) []*wire.MsgBlock {
blocks := make([]*wire.MsgBlock, num)
blockHashes, err := net.Miner.Node.Generate(num)
if err != nil {
t.Fatalf("unable to generate blocks: %v", err)
}
for i, blockHash := range blockHashes {
block, err := net.Miner.Node.GetBlock(blockHash)
if err != nil {
t.Fatalf("unable to get block: %v", err)
}
blocks[i] = block
}
return blocks
}
// openChannelAndAssert attempts to open a channel with the specified
// parameters extended from Alice to Bob. Additionally, two items are asserted
// after the channel is considered open: the funding transaction should be
// found within a block, and that Alice can report the status of the new
// channel.
func openChannelAndAssert(ctx context.Context, t *harnessTest,
net *lntest.NetworkHarness, alice, bob *lntest.HarnessNode,
fundingAmt btcutil.Amount, pushAmt btcutil.Amount) *lnrpc.ChannelPoint {
chanOpenUpdate, err := net.OpenChannel(ctx, alice, bob, fundingAmt,
pushAmt, false)
if err != nil {
t.Fatalf("unable to open channel: %v", err)
}
// Mine 6 blocks, then wait for Alice's node to notify us that the
// channel has been opened. The funding transaction should be found
// within the first newly mined block. We mine 6 blocks to make sure
// the channel is public, as it will not be announced to the network
// before the funding transaction is 6 blocks deep.
block := mineBlocks(t, net, 6)[0]
fundingChanPoint, err := net.WaitForChannelOpen(ctx, chanOpenUpdate)
if err != nil {
t.Fatalf("error while waiting for channel open: %v", err)
}
txidHash, err := getChanPointFundingTxid(fundingChanPoint)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
fundingTxID, err := chainhash.NewHash(txidHash)
if err != nil {
t.Fatalf("unable to create sha hash: %v", err)
}
assertTxInBlock(t, block, fundingTxID)
// The channel should be listed in the peer information returned by
// both peers.
chanPoint := wire.OutPoint{
Hash: *fundingTxID,
Index: fundingChanPoint.OutputIndex,
}
if err := net.AssertChannelExists(ctx, alice, &chanPoint); err != nil {
t.Fatalf("unable to assert channel existence: %v", err)
}
if err := net.AssertChannelExists(ctx, bob, &chanPoint); err != nil {
t.Fatalf("unable to assert channel existence: %v", err)
}
return fundingChanPoint
}
// closeChannelAndAssert attempts to close a channel identified by the passed
// channel point owned by the passed Lightning node. A fully blocking channel
// closure is attempted, therefore the passed context should be a child derived
// via timeout from a base parent. Additionally, once the channel has been
// detected as closed, an assertion checks that the transaction is found within
// a block.
func closeChannelAndAssert(ctx context.Context, t *harnessTest,
net *lntest.NetworkHarness, node *lntest.HarnessNode,
fundingChanPoint *lnrpc.ChannelPoint, force bool) *chainhash.Hash {
closeUpdates, _, err := net.CloseChannel(ctx, node, fundingChanPoint, force)
if err != nil {
t.Fatalf("unable to close channel: %v", err)
}
txidHash, err := getChanPointFundingTxid(fundingChanPoint)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
txid, err := chainhash.NewHash(txidHash)
if err != nil {
t.Fatalf("unable to convert to chainhash: %v", err)
}
chanPointStr := fmt.Sprintf("%v:%v", txid, fundingChanPoint.OutputIndex)
// If we didn't force close the transaction, at this point, the channel
// should now be marked as being in the state of "pending close".
if !force {
pendingChansRequest := &lnrpc.PendingChannelsRequest{}
pendingChanResp, err := node.PendingChannels(ctx, pendingChansRequest)
if err != nil {
t.Fatalf("unable to query for pending channels: %v", err)
}
var found bool
for _, pendingClose := range pendingChanResp.PendingClosingChannels {
if pendingClose.Channel.ChannelPoint == chanPointStr {
found = true
break
}
}
if !found {
t.Fatalf("channel not marked as pending close")
}
}
// Finally, generate a single block, wait for the final close status
// update, then ensure that the closing transaction was included in the
// block.
block := mineBlocks(t, net, 1)[0]
closingTxid, err := net.WaitForChannelClose(ctx, closeUpdates)
if err != nil {
t.Fatalf("error while waiting for channel close: %v", err)
}
assertTxInBlock(t, block, closingTxid)
return closingTxid
}
// numOpenChannelsPending sends an RPC request to a node to get a count of the
// node's channels that are currently in a pending state (with a broadcast, but
// not confirmed funding transaction).
func numOpenChannelsPending(ctxt context.Context, node *lntest.HarnessNode) (int, error) {
pendingChansRequest := &lnrpc.PendingChannelsRequest{}
resp, err := node.PendingChannels(ctxt, pendingChansRequest)
if err != nil {
return 0, err
}
return len(resp.PendingOpenChannels), nil
}
// assertNumOpenChannelsPending asserts that a pair of nodes have the expected
// number of pending channels between them.
func assertNumOpenChannelsPending(ctxt context.Context, t *harnessTest,
alice, bob *lntest.HarnessNode, expected int) {
const nPolls = 10
ticker := time.NewTicker(200 * time.Millisecond)
defer ticker.Stop()
for i := 0; i < nPolls; i++ {
aliceNumChans, err := numOpenChannelsPending(ctxt, alice)
if err != nil {
t.Fatalf("error fetching alice's node (%v) pending channels %v",
alice.NodeID, err)
}
bobNumChans, err := numOpenChannelsPending(ctxt, bob)
if err != nil {
t.Fatalf("error fetching bob's node (%v) pending channels %v",
bob.NodeID, err)
}
isLastIteration := i == nPolls-1
aliceStateCorrect := aliceNumChans == expected
if !aliceStateCorrect && isLastIteration {
t.Fatalf("number of pending channels for alice incorrect. "+
"expected %v, got %v", expected, aliceNumChans)
}
bobStateCorrect := bobNumChans == expected
if !bobStateCorrect && isLastIteration {
t.Fatalf("number of pending channels for bob incorrect. "+
"expected %v, got %v",
expected, bobNumChans)
}
if aliceStateCorrect && bobStateCorrect {
return
}
<-ticker.C
}
}
// assertNumConnections asserts number current connections between two peers.
func assertNumConnections(ctxt context.Context, t *harnessTest,
alice, bob *lntest.HarnessNode, expected int) {
const nPolls = 10
tick := time.NewTicker(300 * time.Millisecond)
defer tick.Stop()
for i := nPolls - 1; i >= 0; i-- {
select {
case <-tick.C:
aNumPeers, err := alice.ListPeers(ctxt, &lnrpc.ListPeersRequest{})
if err != nil {
t.Fatalf("unable to fetch alice's node (%v) list peers %v",
alice.NodeID, err)
}
bNumPeers, err := bob.ListPeers(ctxt, &lnrpc.ListPeersRequest{})
if err != nil {
t.Fatalf("unable to fetch bob's node (%v) list peers %v",
bob.NodeID, err)
}
if len(aNumPeers.Peers) != expected {
// Continue polling if this is not the final
// loop.
if i > 0 {
continue
}
t.Fatalf("number of peers connected to alice is incorrect: "+
"expected %v, got %v", expected, len(aNumPeers.Peers))
}
if len(bNumPeers.Peers) != expected {
// Continue polling if this is not the final
// loop.
if i > 0 {
continue
}
t.Fatalf("number of peers connected to bob is incorrect: "+
"expected %v, got %v", expected, len(bNumPeers.Peers))
}
// Alice and Bob both have the required number of
// peers, stop polling and return to caller.
return
}
}
}
// calcStaticFee calculates appropriate fees for commitment transactions. This
// function provides a simple way to allow test balance assertions to take fee
// calculations into account.
//
// TODO(bvu): Refactor when dynamic fee estimation is added.
// TODO(conner) remove code duplication
func calcStaticFee(numHTLCs int) btcutil.Amount {
const (
commitWeight = btcutil.Amount(724)
htlcWeight = 172
feePerKw = btcutil.Amount(50 * 1000 / 4)
)
return feePerKw * (commitWeight +
btcutil.Amount(htlcWeight*numHTLCs)) / 1000
}
// completePaymentRequests sends payments from a lightning node to complete all
// payment requests. If the awaitResponse parameter is true, this function
// does not return until all payments successfully complete without errors.
func completePaymentRequests(ctx context.Context, client lnrpc.LightningClient,
paymentRequests []string, awaitResponse bool) error {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
payStream, err := client.SendPayment(ctx)
if err != nil {
return err
}
for _, payReq := range paymentRequests {
sendReq := &lnrpc.SendRequest{PaymentRequest: payReq}
err := payStream.Send(sendReq)
if err != nil {
return err
}
}
if awaitResponse {
for range paymentRequests {
resp, err := payStream.Recv()
if err != nil {
return err
}
if resp.PaymentError != "" {
return fmt.Errorf("received payment error: %v",
resp.PaymentError)
}
}
} else {
// We are not waiting for feedback in the form of a response, but we
// should still wait long enough for the server to receive and handle
// the send before cancelling the request.
time.Sleep(200 * time.Millisecond)
}
return nil
}
// testBasicChannelFunding performs a test exercising expected behavior from a
// basic funding workflow. The test creates a new channel between Alice and
// Bob, then immediately closes the channel after asserting some expected post
// conditions. Finally, the chain itself is checked to ensure the closing
// transaction was mined.
func testBasicChannelFunding(net *lntest.NetworkHarness, t *harnessTest) {
timeout := time.Duration(time.Second * 5)
ctxb := context.Background()
chanAmt := maxFundingAmount
pushAmt := btcutil.Amount(100000)
// First establish a channel with a capacity of 0.5 BTC between Alice
// and Bob with Alice pushing 100k satoshis to Bob's side during
// funding. This function will block until the channel itself is fully
// open or an error occurs in the funding process. A series of
// assertions will be executed to ensure the funding process completed
// successfully.
ctxt, _ := context.WithTimeout(ctxb, timeout)
chanPoint := openChannelAndAssert(ctxt, t, net, net.Alice, net.Bob,
chanAmt, pushAmt)
ctxt, _ = context.WithTimeout(ctxb, time.Second*15)
err := net.Alice.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("alice didn't report channel: %v", err)
}
err = net.Bob.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("bob didn't report channel: %v", err)
}
// With then channel open, ensure that the amount specified above has
// properly been pushed to Bob.
balReq := &lnrpc.ChannelBalanceRequest{}
aliceBal, err := net.Alice.ChannelBalance(ctxb, balReq)
if err != nil {
t.Fatalf("unable to get alice's balance: %v", err)
}
bobBal, err := net.Bob.ChannelBalance(ctxb, balReq)
if err != nil {
t.Fatalf("unable to get bobs's balance: %v", err)
}
if aliceBal.Balance != int64(chanAmt-pushAmt-calcStaticFee(0)) {
t.Fatalf("alice's balance is incorrect: expected %v got %v",
chanAmt-pushAmt-calcStaticFee(0), aliceBal)
}
if bobBal.Balance != int64(pushAmt) {
t.Fatalf("bob's balance is incorrect: expected %v got %v",
pushAmt, bobBal.Balance)
}
// Finally, immediately close the channel. This function will also
// block until the channel is closed and will additionally assert the
// relevant channel closing post conditions.
ctxt, _ = context.WithTimeout(ctxb, timeout)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPoint, false)
}
// testUpdateChannelPolicy tests that policy updates made to a channel
// gets propagated to other nodes in the network.
func testUpdateChannelPolicy(net *lntest.NetworkHarness, t *harnessTest) {
timeout := time.Duration(time.Second * 5)
ctxb := context.Background()
// Launch notification clients for all nodes, such that we can
// get notified when they discover new c
436E
hannels and updates
// in the graph.
aliceUpdates, aQuit := subscribeGraphNotifications(t, ctxb, net.Alice)
defer close(aQuit)
bobUpdates, bQuit := subscribeGraphNotifications(t, ctxb, net.Bob)
defer close(bQuit)
chanAmt := maxFundingAmount
pushAmt := btcutil.Amount(100000)
// Create a channel Alice->Bob.
ctxt, _ := context.WithTimeout(ctxb, timeout)
chanPoint := openChannelAndAssert(ctxt, t, net, net.Alice, net.Bob,
chanAmt, pushAmt)
ctxt, _ = context.WithTimeout(ctxb, time.Second*15)
err := net.Alice.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("alice didn't report channel: %v", err)
}
err = net.Bob.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("bob didn't report channel: %v", err)
}
// Create Carol and a new channel Bob->Carol.
carol, err := net.NewNode(nil)
if err != nil {
t.Fatalf("unable to create new nodes: %v", err)
}
carolUpdates, cQuit := subscribeGraphNotifications(t, ctxb, carol)
defer close(cQuit)
if err := net.ConnectNodes(ctxb, carol, net.Bob); err != nil {
t.Fatalf("unable to connect dave to alice: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, timeout)
chanPoint2 := openChannelAndAssert(ctxt, t, net, net.Bob, carol,
chanAmt, pushAmt)
ctxt, _ = context.WithTimeout(ctxb, time.Second*15)
err = net.Bob.WaitForNetworkChannelOpen(ctxt, chanPoint2)
if err != nil {
t.Fatalf("bob didn't report channel: %v", err)
}
err = carol.WaitForNetworkChannelOpen(ctxt, chanPoint2)
if err != nil {
t.Fatalf("carol didn't report channel: %v", err)
}
// Update the fees for the channel Alice->Bob, and make sure
// all nodes learn about it.
const feeBase = 1000000
baseFee := int64(1500)
feeRate := int64(12)
timeLockDelta := uint32(66)
req := &lnrpc.PolicyUpdateRequest{
BaseFeeMsat: baseFee,
FeeRate: float64(feeRate),
TimeLockDelta: timeLockDelta,
}
req.Scope = &lnrpc.PolicyUpdateRequest_ChanPoint{
ChanPoint: chanPoint,
}
_, err = net.Alice.UpdateChannelPolicy(ctxb, req)
if err != nil {
t.Fatalf("unable to get alice's balance: %v", err)
}
// txStr returns the string representation of the channel's
// funding tx.
txStr := func(chanPoint *lnrpc.ChannelPoint) string {
txidHash, err := getChanPointFundingTxid(chanPoint)
if err != nil {
return ""
}
fundingTxID, err := chainhash.NewHash(txidHash)
if err != nil {
return ""
}
cp := wire.OutPoint{
Hash: *fundingTxID,
Index: chanPoint.OutputIndex,
}
return cp.String()
}
// A closure that is used to wait for a channel updates that matches
// the channel policy update done by Alice.
waitForChannelUpdate := func(graphUpdates chan *lnrpc.GraphTopologyUpdate,
chanPoints ...*lnrpc.ChannelPoint) {
// Create a map containing all the channel points we are
// waiting for updates for.
cps := make(map[string]bool)
for _, chanPoint := range chanPoints {
cps[txStr(chanPoint)] = true
}
Loop:
for {
select {
case graphUpdate := <-graphUpdates:
if len(graphUpdate.ChannelUpdates) == 0 {
continue
}
chanUpdate := graphUpdate.ChannelUpdates[0]
fundingTxStr := txStr(chanUpdate.ChanPoint)
if _, ok := cps[fundingTxStr]; !ok {
continue
}
if chanUpdate.AdvertisingNode != net.Alice.PubKeyStr {
continue
}
policy := chanUpdate.RoutingPolicy
if policy.FeeBaseMsat != baseFee {
continue
}
if policy.FeeRateMilliMsat != feeRate*feeBase {
continue
}
if policy.TimeLockDelta != timeLockDelta {
continue
}
// We got a policy update that matched the
// values and channel point of what we
// expected, delete it from the map.
delete(cps, fundingTxStr)
// If we have no more channel points we are
// waiting for, break out of the loop.
if len(cps) == 0 {
break Loop
}
case <-time.After(20 * time.Second):
t.Fatalf("did not receive channel update")
}
}
}
// Wait for all nodes to have seen the policy update done by Alice.
waitForChannelUpdate(aliceUpdates, chanPoint)
waitForChannelUpdate(bobUpdates, chanPoint)
waitForChannelUpdate(carolUpdates, chanPoint)
// assertChannelPolicy asserts that the passed node's known channel
// policy for the passed chanPoint is consistent with Alice's current
// expected policy values.
assertChannelPolicy := func(node *lntest.HarnessNode,
chanPoint *lnrpc.ChannelPoint) {
// Get a DescribeGraph from the node.
descReq := &lnrpc.ChannelGraphRequest{}
chanGraph, err := node.DescribeGraph(ctxb, descReq)
if err != nil {
t.Fatalf("unable to query for alice's routing table: %v",
err)
}
edgeFound := false
for _, e := range chanGraph.Edges {
if e.ChanPoint == txStr(chanPoint) {
edgeFound = true
if e.Node1Pub == net.Alice.PubKeyStr {
if e.Node1Policy.FeeBaseMsat != baseFee {
t.Fatalf("expected base fee "+
"%v, got %v", baseFee,
e.Node1Policy.FeeBaseMsat)
}
if e.Node1Policy.FeeRateMilliMsat != feeRate*feeBase {
t.Fatalf("expected fee rate "+
"%v, got %v", feeRate*feeBase,
e.Node1Policy.FeeRateMilliMsat)
}
if e.Node1Policy.TimeLockDelta != timeLockDelta {
t.Fatalf("expected time lock "+
"delta %v, got %v",
timeLockDelta,
e.Node1Policy.TimeLockDelta)
}
} else {
if e.Node2Policy.FeeBaseMsat != baseFee {
t.Fatalf("expected base fee "+
"%v, got %v", baseFee,
e.Node2Policy.FeeBaseMsat)
}
if e.Node2Policy.FeeRateMilliMsat != feeRate*feeBase {
t.Fatalf("expected fee rate "+
"%v, got %v", feeRate*feeBase,
e.Node2Policy.FeeRateMilliMsat)
}
if e.Node2Policy.TimeLockDelta != timeLockDelta {
t.Fatalf("expected time lock "+
"delta %v, got %v",
timeLockDelta,
e.Node2Policy.TimeLockDelta)
}
}
}
}
if !edgeFound {
t.Fatalf("did not find edge")
}
}
// Check that all nodes now know about Alice's updated policy.
assertChannelPolicy(net.Alice, chanPoint)
assertChannelPolicy(net.Bob, chanPoint)
assertChannelPolicy(carol, chanPoint)
// Open channel to Carol.
if err := net.ConnectNodes(ctxb, net.Alice, carol); err != nil {
t.Fatalf("unable to connect dave to alice: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, timeout)
chanPoint3 := openChannelAndAssert(ctxt, t, net, net.Alice, carol,
chanAmt, pushAmt)
ctxt, _ = context.WithTimeout(ctxb, time.Second*15)
err = net.Alice.WaitForNetworkChannelOpen(ctxt, chanPoint3)
if err != nil {
t.Fatalf("alice didn't report channel: %v", err)
}
err = carol.WaitForNetworkChannelOpen(ctxt, chanPoint3)
if err != nil {
t.Fatalf("bob didn't report channel: %v", err)
}
// Make a global update, and check that both channels'
// new policies get propagated.
baseFee = int64(800)
feeRate = int64(123)
timeLockDelta = uint32(22)
req = &lnrpc.PolicyUpdateRequest{
BaseFeeMsat: baseFee,
FeeRate: float64(feeRate),
TimeLockDelta: timeLockDelta,
}
req.Scope = &lnrpc.PolicyUpdateRequest_Global{}
_, err = net.Alice.UpdateChannelPolicy(ctxb, req)
if err != nil {
t.Fatalf("unable to get alice's balance: %v", err)
}
// Wait for all nodes to have seen the policy updates
// for both of Alice's channels.
waitForChannelUpdate(aliceUpdates, chanPoint, chanPoint3)
waitForChannelUpdate(bobUpdates, chanPoint, chanPoint3)
waitForChannelUpdate(carolUpdates, chanPoint, chanPoint3)
// And finally check that all nodes remembers the policy
// update they received.
assertChannelPolicy(net.Alice, chanPoint)
assertChannelPolicy(net.Bob, chanPoint)
assertChannelPolicy(carol, chanPoint)
assertChannelPolicy(net.Alice, chanPoint3)
assertChannelPolicy(net.Bob, chanPoint3)
assertChannelPolicy(carol, chanPoint3)
// Close the channels.
ctxt, _ = context.WithTimeout(ctxb, timeout)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPoint, false)
ctxt, _ = context.WithTimeout(ctxb, timeout)
closeChannelAndAssert(ctxt, t, net, net.Bob, chanPoint2, false)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPoint3, false)
ctxt, _ = context.WithTimeout(ctxb, timeout)
// Clean up carol's node.
if err := net.ShutdownNode(carol); err != nil {
t.Fatalf("unable to shutdown carol: %v", err)
}
}
// testOpenChannelAfterReorg tests that in the case where we have an open
// channel where the funding tx gets reorged out, the channel will no
// longer be present in the node's routing table.
func testOpenChannelAfterReorg(net *lntest.NetworkHarness, t *harnessTest) {
timeout := time.Duration(time.Second * 5)
ctxb := context.Background()
// Set up a new miner that we can use to cause a reorg.
args := []string{"--rejectnonstd"}
miner, err := rpctest.New(harnessNetParams,
&rpcclient.NotificationHandlers{}, args)
if err != nil {
t.Fatalf("unable to create mining node: %v", err)
}
if err := miner.SetUp(true, 50); err != nil {
t.Fatalf("unable to set up mining node: %v", err)
}
defer miner.TearDown()
if err := miner.Node.NotifyNewTransactions(false); err != nil {
t.Fatalf("unable to request transaction notifications: %v", err)
}
// We start by connecting the new miner to our original miner,
// such that it will sync to our original chain.
if err := rpctest.ConnectNode(net.Miner, miner); err != nil {
t.Fatalf("unable to connect harnesses: %v", err)
}
nodeSlice := []*rpctest.Harness{net.Miner, miner}
if err := rpctest.JoinNodes(nodeSlice, rpctest.Blocks); err != nil {
t.Fatalf("unable to join node on blocks: %v", err)
}
// The two should be on the same blockheight.
_, newNodeHeight, err := miner.Node.GetBestBlock()
if err != nil {
t.Fatalf("unable to get current blockheight %v", err)
}
_, orgNodeHeight, err := net.Miner.Node.GetBestBlock()
if err != nil {
t.Fatalf("unable to get current blockheight %v", err)
}
if newNodeHeight != orgNodeHeight {
t.Fatalf("expected new miner(%d) and original miner(%d) to "+
"be on the same height", newNodeHeight, orgNodeHeight)
}
// We disconnect the two nodes, such that we can start mining on them
// individually without the other one learning about the new blocks.
err = net.Miner.Node.AddNode(miner.P2PAddress(), rpcclient.ANRemove)
if err != nil {
t.Fatalf("unable to remove node: %v", err)
}
// Create a new channel that requires 1 confs before it's considered
// open, then broadcast the funding transaction
chanAmt := maxFundingAmount
pushAmt := btcutil.Amount(0)
ctxt, _ := context.WithTimeout(ctxb, timeout)
pendingUpdate, err := net.OpenPendingChannel(ctxt, net.Alice, net.Bob,
chanAmt, pushAmt)
if err != nil {
t.Fatalf("unable to open channel: %v", err)
}
// At this point, the channel's funding transaction will have been
// broadcast, but not confirmed, and the channel should be pending.
ctxt, _ = context.WithTimeout(ctxb, timeout)
assertNumOpenChannelsPending(ctxt, t, net.Alice, net.Bob, 1)
fundingTxID, err := chainhash.NewHash(pendingUpdate.Txid)
if err != nil {
t.Fatalf("unable to convert funding txid into chainhash.Hash:"+
" %v", err)
}
// We now cause a fork, by letting our original miner mine 10 blocks,
// and our new miner mine 15. This will also confirm our pending
// channel, which should be considered open.
block := mineBlocks(t, net, 10)[0]
assertTxInBlock(t, block, fundingTxID)
miner.Node.Generate(15)
// Ensure the chain lengths are what we expect.
_, newNodeHeight, err = miner.Node.GetBestBlock()
if err != nil {
t.Fatalf("unable to get current blockheight %v", err)
}
_, orgNodeHeight, err = net.Miner.Node.GetBestBlock()
if err != nil {
t.Fatalf("unable to get current blockheight %v", err)
}
if newNodeHeight != orgNodeHeight+5 {
t.Fatalf("expected new miner(%d) to be 5 blocks ahead of "+
"original miner(%d)", newNodeHeight, orgNodeHeight)
}
chanPoint := &lnrpc.ChannelPoint{
FundingTxid: &lnrpc.ChannelPoint_FundingTxidBytes{
FundingTxidBytes: pendingUpdate.Txid,
},
OutputIndex: pendingUpdate.OutputIndex,
}
// Ensure channel is no longer pending.
assertNumOpenChannelsPending(ctxt, t, net.Alice, net.Bob, 0)
// Wait for Alice and Bob to recognize and advertise the new channel
// generated above.
ctxt, _ = context.WithTimeout(ctxb, timeout)
err = net.Alice.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("alice didn't advertise channel before "+
"timeout: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, timeout)
err = net.Bob.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("bob didn't advertise channel before "+
"timeout: %v", err)
}
// Alice should now have 1 edge in her graph.
req := &lnrpc.ChannelGraphRequest{}
chanGraph, err := net.Alice.DescribeGraph(ctxb, req)
if err != nil {
t.Fatalf("unable to query for alice's routing table: %v", err)
}
numEdges := len(chanGraph.Edges)
if numEdges != 1 {
t.Fatalf("expected to find one edge in the graph, found %d",
numEdges)
}
// Connecting the two miners should now cause our original one to sync
// to the new, and longer chain.
if err := rpctest.ConnectNode(net.Miner, miner); err != nil {
t.Fatalf("unable to connect harnesses: %v", err)
}
if err := rpctest.JoinNodes(nodeSlice, rpctest.Blocks); err != nil {
t.Fatalf("unable to join node on blocks: %v", err)
}
// Once again they should be on the same chain.
_, newNodeHeight, err = miner.Node.GetBestBlock()
if err != nil {
t.Fatalf("unable to get current blockheight %v", err)
}
_, orgNodeHeight, err = net.Miner.Node.GetBestBlock()
if err != nil {
t.Fatalf("unable to get current blockheight %v", err)
}
if newNodeHeight != orgNodeHeight {
t.Fatalf("expected new miner(%d) and original miner(%d) to "+
"be on the same height", newNodeHeight, orgNodeHeight)
}
time.Sleep(time.Second * 2)
// Since the fundingtx was reorged out, Alice should now have no edges
// in her graph.
req = &lnrpc.ChannelGraphRequest{}
chanGraph, err = net.Alice.DescribeGraph(ctxb, req)
if err != nil {
t.Fatalf("unable to query for alice's routing table: %v", err)
}
numEdges = len(chanGraph.Edges)
if numEdges != 0 {
t.Fatalf("expected to find no edge in the graph, found %d",
numEdges)
}
ctxt, _ = context.WithTimeout(ctxb, timeout)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPoint, false)
}
// testDisconnectingTargetPeer performs a test which
// disconnects Alice-peer from Bob-peer and then re-connects them again
func testDisconnectingTargetPeer(net *lntest.NetworkHarness, t *harnessTest) {
ctxb := context.Background()
// Check existing connection.
assertNumConnections(ctxb, t, net.Alice, net.Bob, 1)
chanAmt := maxFundingAmount
pushAmt := btcutil.Amount(0)
timeout := time.Duration(time.Second * 10)
ctxt, _ := context.WithTimeout(ctxb, timeout)
// Create a new channel that requires 1 confs before it's considered
// open, then broadcast the funding transaction
const numConfs = 1
pendingUpdate, err := net.OpenPendingChannel(ctxt, net.Alice, net.Bob,
chanAmt, pushAmt)
if err != nil {
t.Fatalf("unable to open channel: %v", err)
}
// At this point, the channel's funding transaction will have
// been broadcast, but not confirmed. Alice and Bob's nodes
// should reflect this when queried via RPC.
ctxt, _ = context.WithTimeout(ctxb, timeout)
assertNumOpenChannelsPending(ctxt, t, net.Alice, net.Bob, 1)
// Disconnect Alice-peer from Bob-peer and get error
// causes by one pending channel with detach node is existing.
if err := net.DisconnectNodes(ctxt, net.Alice, net.Bob); err == nil {
t.Fatalf("Bob's peer was disconnected from Alice's"+
" while one pending channel is existing: err %v", err)
}
time.Sleep(time.Millisecond * 300)
// Check existing connection.
assertNumConnections(ctxb, t, net.Alice, net.Bob, 1)
fundingTxID, err := chainhash.NewHash(pendingUpdate.Txid)
if err != nil {
t.Fatalf("unable to convert funding txid into chainhash.Hash:"+
" %v", err)
}
// Mine a block, then wait for Alice's node to notify us that the
// channel has been opened. The funding transaction should be found
// within the newly mined block.
block := mineBlocks(t, net, numConfs)[0]
assertTxInBlock(t, block, fundingTxID)