lnd.xprv/lntest/itest/lnd_single_hop_invoice_test.go

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package itest
import (
"bytes"
"context"
"encoding/hex"
"time"
"github.com/btcsuite/btcutil"
"github.com/davecgh/go-spew/spew"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
"github.com/lightningnetwork/lnd/lntest"
"github.com/lightningnetwork/lnd/lntest/wait"
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"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/lnwire"
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"github.com/lightningnetwork/lnd/record"
"github.com/stretchr/testify/require"
)
func testSingleHopInvoice(net *lntest.NetworkHarness, t *harnessTest) {
ctxb := context.Background()
// Open a channel with 100k satoshis between Alice and Bob with Alice being
// the sole funder of the channel.
ctxt, _ := context.WithTimeout(ctxb, channelOpenTimeout)
chanAmt := btcutil.Amount(100000)
chanPoint := openChannelAndAssert(
ctxt, t, net, net.Alice, net.Bob,
lntest.OpenChannelParams{
Amt: chanAmt,
},
)
// Now that the channel is open, create an invoice for Bob which
// expects a payment of 1000 satoshis from Alice paid via a particular
// preimage.
const paymentAmt = 1000
preimage := bytes.Repeat([]byte("A"), 32)
invoice := &lnrpc.Invoice{
Memo: "testing",
RPreimage: preimage,
Value: paymentAmt,
}
invoiceResp, err := net.Bob.AddInvoice(ctxb, invoice)
if err != nil {
t.Fatalf("unable to add invoice: %v", err)
}
// Wait for Alice to recognize and advertise the new channel generated
// above.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
err = net.Alice.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("alice didn't advertise channel before "+
"timeout: %v", err)
}
err = net.Bob.WaitForNetworkChannelOpen(ctxt, chanPoint)
if err != nil {
t.Fatalf("bob didn't advertise channel before "+
"timeout: %v", err)
}
// With the invoice for Bob added, send a payment towards Alice paying
// to the above generated invoice.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
resp := sendAndAssertSuccess(
ctxt, t, net.Alice,
&routerrpc.SendPaymentRequest{
PaymentRequest: invoiceResp.PaymentRequest,
TimeoutSeconds: 60,
FeeLimitMsat: noFeeLimitMsat,
},
)
if hex.EncodeToString(preimage) != resp.PaymentPreimage {
t.Fatalf("preimage mismatch: expected %v, got %v", preimage,
resp.PaymentPreimage)
}
// Bob's invoice should now be found and marked as settled.
payHash := &lnrpc.PaymentHash{
RHash: invoiceResp.RHash,
}
ctxt, _ = context.WithTimeout(ctxt, defaultTimeout)
dbInvoice, err := net.Bob.LookupInvoice(ctxt, payHash)
if err != nil {
t.Fatalf("unable to lookup invoice: %v", err)
}
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if !dbInvoice.Settled { // nolint:staticcheck
t.Fatalf("bob's invoice should be marked as settled: %v",
spew.Sdump(dbInvoice))
}
// With the payment completed all balance related stats should be
// properly updated.
err = wait.NoError(
assertAmountSent(paymentAmt, net.Alice, net.Bob),
3*time.Second,
)
if err != nil {
t.Fatalf(err.Error())
}
// Create another invoice for Bob, this time leaving off the preimage
// to one will be randomly generated. We'll test the proper
// encoding/decoding of the zpay32 payment requests.
invoice = &lnrpc.Invoice{
Memo: "test3",
Value: paymentAmt,
}
ctxt, _ = context.WithTimeout(ctxt, defaultTimeout)
invoiceResp, err = net.Bob.AddInvoice(ctxt, invoice)
if err != nil {
t.Fatalf("unable to add invoice: %v", err)
}
// Next send another payment, but this time using a zpay32 encoded
// invoice rather than manually specifying the payment details.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
sendAndAssertSuccess(
ctxt, t, net.Alice,
&routerrpc.SendPaymentRequest{
PaymentRequest: invoiceResp.PaymentRequest,
TimeoutSeconds: 60,
FeeLimitMsat: noFeeLimitMsat,
},
)
// The second payment should also have succeeded, with the balances
// being update accordingly.
err = wait.NoError(
assertAmountSent(2*paymentAmt, net.Alice, net.Bob),
3*time.Second,
)
if err != nil {
t.Fatalf(err.Error())
}
// Next send a keysend payment.
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keySendPreimage := lntypes.Preimage{3, 4, 5, 11}
keySendHash := keySendPreimage.Hash()
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
sendAndAssertSuccess(
ctxt, t, net.Alice,
&routerrpc.SendPaymentRequest{
Dest: net.Bob.PubKey[:],
Amt: paymentAmt,
FinalCltvDelta: 40,
PaymentHash: keySendHash[:],
DestCustomRecords: map[uint64][]byte{
record.KeySendType: keySendPreimage[:],
},
TimeoutSeconds: 60,
FeeLimitMsat: noFeeLimitMsat,
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},
)
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// The keysend payment should also have succeeded, with the balances
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// being update accordingly.
err = wait.NoError(
assertAmountSent(3*paymentAmt, net.Alice, net.Bob),
3*time.Second,
)
if err != nil {
t.Fatalf(err.Error())
}
// Assert that the invoice has the proper AMP fields set, since the
// legacy keysend payment should have been promoted into an AMP payment
// internally.
ctxt, _ = context.WithTimeout(ctxb, defaultTimeout)
keysendInvoice, err := net.Bob.LookupInvoice(
ctxt, &lnrpc.PaymentHash{
RHash: keySendHash[:],
},
)
require.NoError(t.t, err)
require.Equal(t.t, 1, len(keysendInvoice.Htlcs))
htlc := keysendInvoice.Htlcs[0]
require.Equal(t.t, uint64(0), htlc.MppTotalAmtMsat)
require.Nil(t.t, htlc.Amp)
// Now create an invoice and specify routing hints.
// We will test that the routing hints are encoded properly.
hintChannel := lnwire.ShortChannelID{BlockHeight: 10}
bobPubKey := hex.EncodeToString(net.Bob.PubKey[:])
hints := []*lnrpc.RouteHint{
{
HopHints: []*lnrpc.HopHint{
{
NodeId: bobPubKey,
ChanId: hintChannel.ToUint64(),
FeeBaseMsat: 1,
FeeProportionalMillionths: 1000000,
CltvExpiryDelta: 20,
},
},
},
}
invoice = &lnrpc.Invoice{
Memo: "hints",
Value: paymentAmt,
RouteHints: hints,
}
ctxt, _ = context.WithTimeout(ctxt, defaultTimeout)
invoiceResp, err = net.Bob.AddInvoice(ctxt, invoice)
if err != nil {
t.Fatalf("unable to add invoice: %v", err)
}
payreq, err := net.Bob.DecodePayReq(ctxt, &lnrpc.PayReqString{PayReq: invoiceResp.PaymentRequest})
if err != nil {
t.Fatalf("failed to decode payment request %v", err)
}
if len(payreq.RouteHints) != 1 {
t.Fatalf("expected one routing hint")
}
routingHint := payreq.RouteHints[0]
if len(routingHint.HopHints) != 1 {
t.Fatalf("expected one hop hint")
}
hopHint := routingHint.HopHints[0]
if hopHint.FeeProportionalMillionths != 1000000 {
t.Fatalf("wrong FeeProportionalMillionths %v",
hopHint.FeeProportionalMillionths)
}
if hopHint.NodeId != bobPubKey {
t.Fatalf("wrong NodeId %v",
hopHint.NodeId)
}
if hopHint.ChanId != hintChannel.ToUint64() {
t.Fatalf("wrong ChanId %v",
hopHint.ChanId)
}
if hopHint.FeeBaseMsat != 1 {
t.Fatalf("wrong FeeBaseMsat %v",
hopHint.FeeBaseMsat)
}
if hopHint.CltvExpiryDelta != 20 {
t.Fatalf("wrong CltvExpiryDelta %v",
hopHint.CltvExpiryDelta)
}
ctxt, _ = context.WithTimeout(ctxb, channelCloseTimeout)
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPoint, false)
}