lntest/itest: add new test for external chan point funding
This commit is contained in:
Olaoluwa Osuntokun
parent
be4db0ebca
commit
3de3ec8008
@ -33,9 +33,11 @@ import (
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"github.com/lightningnetwork/lnd"
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"github.com/lightningnetwork/lnd/chanbackup"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/input"
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"github.com/lightningnetwork/lnd/lnrpc"
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"github.com/lightningnetwork/lnd/lnrpc/invoicesrpc"
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"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
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"github.com/lightningnetwork/lnd/lnrpc/signrpc"
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"github.com/lightningnetwork/lnd/lnrpc/watchtowerrpc"
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"github.com/lightningnetwork/lnd/lnrpc/wtclientrpc"
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"github.com/lightningnetwork/lnd/lntest"
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@ -955,8 +957,8 @@ func testOnchainFundRecovery(net *lntest.NetworkHarness, t *harnessTest) {
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// then return a function closure that should be called to assert proper
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// channel closure.
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func basicChannelFundingTest(t *harnessTest, net *lntest.NetworkHarness,
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alice *lntest.HarnessNode,
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bob *lntest.HarnessNode) (*lnrpc.Channel, *lnrpc.Channel, func(), error) {
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alice *lntest.HarnessNode, bob *lntest.HarnessNode,
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fundingShim *lnrpc.FundingShim) (*lnrpc.Channel, *lnrpc.Channel, func(), error) {
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chanAmt := lnd.MaxBtcFundingAmount
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pushAmt := btcutil.Amount(100000)
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@ -974,6 +976,7 @@ func basicChannelFundingTest(t *harnessTest, net *lntest.NetworkHarness,
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lntest.OpenChannelParams{
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Amt: chanAmt,
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PushAmt: pushAmt,
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FundingShim: fundingShim,
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},
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)
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@ -1095,7 +1098,7 @@ test:
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ht := t
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success := t.t.Run(testName, func(t *testing.T) {
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carolChannel, daveChannel, closeChan, err := basicChannelFundingTest(
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ht, net, carol, dave,
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ht, net, carol, dave, nil,
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)
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if err != nil {
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t.Fatalf("failed funding flow: %v", err)
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@ -14907,6 +14910,181 @@ func testHoldInvoicePersistence(net *lntest.NetworkHarness, t *harnessTest) {
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}
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}
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// testExternalFundingChanPoint tests that we're able to carry out a normal
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// channel funding workflow given a channel point that was constructed outside
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// the main daemon.
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func testExternalFundingChanPoint(net *lntest.NetworkHarness, t *harnessTest) {
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ctxb := context.Background()
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// First, we'll create two new nodes that we'll use to open channel
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// between for this test.
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carol, err := net.NewNode("carol", nil)
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if err != nil {
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t.Fatalf("unable to start new node: %v", err)
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}
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defer shutdownAndAssert(net, t, carol)
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dave, err := net.NewNode("dave", nil)
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if err != nil {
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t.Fatalf("unable to start new node: %v", err)
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}
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defer shutdownAndAssert(net, t, dave)
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// Carol will be funding the channel, so we'll send some coins over to
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// her and ensure they have enough confirmations before we proceed.
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ctxt, _ := context.WithTimeout(ctxb, defaultTimeout)
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err = net.SendCoins(ctxt, btcutil.SatoshiPerBitcoin, carol)
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if err != nil {
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t.Fatalf("unable to send coins to carol: %v", err)
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}
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// Before we start the test, we'll ensure both sides are connected to
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// the funding flow can properly be executed.
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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err = net.EnsureConnected(ctxt, carol, dave)
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if err != nil {
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t.Fatalf("unable to connect peers: %v", err)
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}
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// At this point, we're ready to simulate our external channle funding
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// flow. To start with, we'll get to new keys from both sides which
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// will be used to create the multi-sig output for the external funding
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// transaction.
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keyLoc := &signrpc.KeyLocator{
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KeyFamily: 9999,
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KeyIndex: 1,
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}
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carolFundingKey, err := carol.WalletKitClient.DeriveKey(ctxb, keyLoc)
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if err != nil {
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t.Fatalf("unable to get carol funding key: %v", err)
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}
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daveFundingKey, err := dave.WalletKitClient.DeriveKey(ctxb, keyLoc)
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if err != nil {
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t.Fatalf("unable to get dave funding key: %v", err)
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}
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// Now that we have the multi-sig keys for each party, we can manually
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// construct the funding transaction. We'll instruct the backend to
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// immediately create and broadcast a transaction paying out an exact
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// amount. Normally this would reside in the mempool, but we just
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// confirm it now for simplicity.
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const chanSize = lnd.MaxBtcFundingAmount
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_, fundingOutput, err := input.GenFundingPkScript(
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carolFundingKey.RawKeyBytes, daveFundingKey.RawKeyBytes,
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int64(chanSize),
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)
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if err != nil {
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t.Fatalf("unable to create funding script: %v", err)
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}
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txid, err := net.Miner.SendOutputsWithoutChange(
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[]*wire.TxOut{fundingOutput}, 5,
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)
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if err != nil {
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t.Fatalf("unable to create funding output: %v", err)
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}
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// At this point, we can being our external channel funding workflow.
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// We'll start by generating a pending channel ID externally that will
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// be used to track this new funding type.
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var pendingChanID [32]byte
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if _, err := rand.Read(pendingChanID[:]); err != nil {
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t.Fatalf("unable to gen pending chan ID: %v", err)
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}
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// Now that we have the pending channel ID, Dave (our responder) will
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// register the intent to receive a new channel funding workflow using
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// the pending channel ID.
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chanPointShim := &lnrpc.ChanPointShim{
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Amt: int64(chanSize),
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ChanPoint: &lnrpc.ChannelPoint{
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FundingTxid: &lnrpc.ChannelPoint_FundingTxidBytes{
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FundingTxidBytes: txid[:],
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},
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},
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LocalKey: &lnrpc.KeyDescriptor{
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RawKeyBytes: daveFundingKey.RawKeyBytes,
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KeyLoc: &lnrpc.KeyLocator{
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KeyFamily: daveFundingKey.KeyLoc.KeyFamily,
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KeyIndex: daveFundingKey.KeyLoc.KeyIndex,
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},
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},
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RemoteKey: carolFundingKey.RawKeyBytes,
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PendingChanId: pendingChanID[:],
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}
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fundingShim := &lnrpc.FundingShim{
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Shim: &lnrpc.FundingShim_ChanPointShim{
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ChanPointShim: chanPointShim,
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},
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}
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_, err = dave.FundingStateStep(ctxb, &lnrpc.FundingTransitionMsg{
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Trigger: &lnrpc.FundingTransitionMsg_ShimRegister{
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ShimRegister: fundingShim,
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},
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})
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if err != nil {
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t.Fatalf("unable to walk funding state forward: %v", err)
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}
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// If we attempt to register the same shim (has the same pending chan
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// ID), then we should get an error.
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_, err = dave.FundingStateStep(ctxb, &lnrpc.FundingTransitionMsg{
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Trigger: &lnrpc.FundingTransitionMsg_ShimRegister{
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ShimRegister: fundingShim,
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},
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})
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if err == nil {
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t.Fatalf("duplicate pending channel ID funding shim " +
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"registration should trigger an error")
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}
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// We'll take the chan point shim we just registered for Dave (the
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// responder), and swap the local/remote keys before we feed it in as
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// Carol's funding shim as the initiator.
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fundingShim.GetChanPointShim().LocalKey = &lnrpc.KeyDescriptor{
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RawKeyBytes: carolFundingKey.RawKeyBytes,
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KeyLoc: &lnrpc.KeyLocator{
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KeyFamily: carolFundingKey.KeyLoc.KeyFamily,
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KeyIndex: carolFundingKey.KeyLoc.KeyIndex,
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},
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}
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fundingShim.GetChanPointShim().RemoteKey = daveFundingKey.RawKeyBytes
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// At this point, we'll now carry out the normal basic channel funding
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// test as everything should now proceed as normal (a regular channel
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// funding flow).
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_, _, closeChans, err := basicChannelFundingTest(
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t, net, carol, dave, fundingShim,
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)
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if err != nil {
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t.Fatalf("unable to open channels: %v", err)
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}
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// Next, to make sure the channel functions as normal, we'll make some
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// payments within the channel.
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payAmt := btcutil.Amount(100000)
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invoice := &lnrpc.Invoice{
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Memo: "new chans",
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Value: int64(payAmt),
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}
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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resp, err := dave.AddInvoice(ctxt, invoice)
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if err != nil {
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t.Fatalf("unable to add invoice: %v", err)
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}
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ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
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err = completePaymentRequests(
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ctxt, carol, []string{resp.PaymentRequest}, true,
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)
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if err != nil {
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t.Fatalf("unable to make payments between Carol and Dave")
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}
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// To conclude, we'll close the newly created channel between Carol and
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// Dave.
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closeChans()
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}
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type testCase struct {
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name string
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test func(net *lntest.NetworkHarness, t *harnessTest)
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@ -15170,6 +15348,10 @@ var testsCases = []*testCase{
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name: "immediate payment after channel opened",
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test: testPaymentFollowingChannelOpen,
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},
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{
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name: "external channel funding",
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test: testExternalFundingChanPoint,
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},
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}
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// TestLightningNetworkDaemon performs a series of integration tests amongst a
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