23cc8389f2
In this commit, we update the `HopIterator` to gain awareness of the new TLV hop payload. The default `HopIterator` will now hide the details of the TLV from the caller, and return the same `ForwardingInfo` struct in a uniform manner. We also add a new method: `ExtraOnionBlob` to allow the caller to obtain the raw EOB (the serialized TLV stream) to pass around. Within the link, we'll now pass the EOB information into the invoice registry. This allows the registry to parse out any additional information from the EOB that it needs to settle the payment, such as a preimage shard in the AMP case.
499 lines
13 KiB
Go
499 lines
13 KiB
Go
package invoices
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import (
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"io/ioutil"
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"os"
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"testing"
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"time"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/lntypes"
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"github.com/lightningnetwork/lnd/lnwire"
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)
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var (
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testTimeout = 5 * time.Second
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preimage = lntypes.Preimage{
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
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}
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hash = preimage.Hash()
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testInvoiceExpiry = uint32(3)
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testCurrentHeight = int32(0)
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testFinalCltvRejectDelta = int32(3)
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)
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func decodeExpiry(payReq string) (uint32, error) {
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return uint32(testInvoiceExpiry), nil
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}
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var (
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testInvoice = &channeldb.Invoice{
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Terms: channeldb.ContractTerm{
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PaymentPreimage: preimage,
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Value: lnwire.MilliSatoshi(100000),
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},
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}
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)
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func newTestContext(t *testing.T) (*InvoiceRegistry, func()) {
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cdb, cleanup, err := newDB()
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if err != nil {
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t.Fatal(err)
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}
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// Instantiate and start the invoice registry.
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registry := NewRegistry(cdb, decodeExpiry, testFinalCltvRejectDelta)
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err = registry.Start()
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if err != nil {
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cleanup()
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t.Fatal(err)
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}
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return registry, func() {
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registry.Stop()
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cleanup()
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}
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}
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// TestSettleInvoice tests settling of an invoice and related notifications.
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func TestSettleInvoice(t *testing.T) {
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registry, cleanup := newTestContext(t)
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defer cleanup()
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allSubscriptions := registry.SubscribeNotifications(0, 0)
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defer allSubscriptions.Cancel()
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// Subscribe to the not yet existing invoice.
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subscription, err := registry.SubscribeSingleInvoice(hash)
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if err != nil {
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t.Fatal(err)
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}
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defer subscription.Cancel()
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if subscription.hash != hash {
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t.Fatalf("expected subscription for provided hash")
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}
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// Add the invoice.
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addIdx, err := registry.AddInvoice(testInvoice, hash)
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if err != nil {
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t.Fatal(err)
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}
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if addIdx != 1 {
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t.Fatalf("expected addIndex to start with 1, but got %v",
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addIdx)
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}
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// We expect the open state to be sent to the single invoice subscriber.
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select {
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case update := <-subscription.Updates:
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if update.Terms.State != channeldb.ContractOpen {
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t.Fatalf("expected state ContractOpen, but got %v",
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update.Terms.State)
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}
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case <-time.After(testTimeout):
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t.Fatal("no update received")
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}
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// We expect a new invoice notification to be sent out.
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select {
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case newInvoice := <-allSubscriptions.NewInvoices:
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if newInvoice.Terms.State != channeldb.ContractOpen {
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t.Fatalf("expected state ContractOpen, but got %v",
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newInvoice.Terms.State)
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}
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case <-time.After(testTimeout):
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t.Fatal("no update received")
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}
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hodlChan := make(chan interface{}, 1)
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// Settle invoice with a slightly higher amount.
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amtPaid := lnwire.MilliSatoshi(100500)
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_, err = registry.NotifyExitHopHtlc(
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hash, amtPaid, testInvoiceExpiry, 0, hodlChan, nil,
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)
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if err != nil {
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t.Fatal(err)
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}
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// We expect the settled state to be sent to the single invoice
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// subscriber.
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select {
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case update := <-subscription.Updates:
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if update.Terms.State != channeldb.ContractSettled {
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t.Fatalf("expected state ContractOpen, but got %v",
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update.Terms.State)
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}
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if update.AmtPaid != amtPaid {
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t.Fatal("invoice AmtPaid incorrect")
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}
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case <-time.After(testTimeout):
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t.Fatal("no update received")
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}
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// We expect a settled notification to be sent out.
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select {
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case settledInvoice := <-allSubscriptions.SettledInvoices:
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if settledInvoice.Terms.State != channeldb.ContractSettled {
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t.Fatalf("expected state ContractOpen, but got %v",
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settledInvoice.Terms.State)
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}
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case <-time.After(testTimeout):
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t.Fatal("no update received")
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}
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// Try to settle again. We need this idempotent behaviour after a
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// restart.
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event, err := registry.NotifyExitHopHtlc(
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hash, amtPaid, testInvoiceExpiry, testCurrentHeight, hodlChan,
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nil,
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)
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if err != nil {
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t.Fatalf("unexpected NotifyExitHopHtlc error: %v", err)
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}
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if event.Preimage == nil {
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t.Fatal("expected settle event")
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}
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// Try to settle again with a higher amount. This should result in a
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// cancel event because after a restart the amount should still be the
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// same. New HTLCs with a different amount should be rejected.
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event, err = registry.NotifyExitHopHtlc(
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hash, amtPaid+600, testInvoiceExpiry, testCurrentHeight,
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hodlChan, nil,
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)
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if err != nil {
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t.Fatalf("unexpected NotifyExitHopHtlc error: %v", err)
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}
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if event.Preimage != nil {
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t.Fatal("expected cancel event")
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}
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// Try to settle again with a lower amount. This should show the same
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// behaviour as settling with a higher amount.
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event, err = registry.NotifyExitHopHtlc(
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hash, amtPaid-600, testInvoiceExpiry, testCurrentHeight,
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hodlChan, nil,
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)
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if err != nil {
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t.Fatalf("unexpected NotifyExitHopHtlc error: %v", err)
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}
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if event.Preimage != nil {
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t.Fatal("expected cancel event")
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}
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// Check that settled amount remains unchanged.
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inv, _, err := registry.LookupInvoice(hash)
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if err != nil {
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t.Fatal(err)
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}
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if inv.AmtPaid != amtPaid {
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t.Fatal("expected amount to be unchanged")
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}
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// Try to cancel.
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err = registry.CancelInvoice(hash)
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if err != channeldb.ErrInvoiceAlreadySettled {
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t.Fatal("expected cancelation of a settled invoice to fail")
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}
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// As this is a direct sette, we expect nothing on the hodl chan.
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select {
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case <-hodlChan:
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t.Fatal("unexpected event")
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default:
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}
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}
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// TestCancelInvoice tests cancelation of an invoice and related notifications.
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func TestCancelInvoice(t *testing.T) {
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registry, cleanup := newTestContext(t)
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defer cleanup()
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allSubscriptions := registry.SubscribeNotifications(0, 0)
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defer allSubscriptions.Cancel()
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// Try to cancel the not yet existing invoice. This should fail.
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err := registry.CancelInvoice(hash)
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if err != channeldb.ErrInvoiceNotFound {
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t.Fatalf("expected ErrInvoiceNotFound, but got %v", err)
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}
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// Subscribe to the not yet existing invoice.
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subscription, err := registry.SubscribeSingleInvoice(hash)
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if err != nil {
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t.Fatal(err)
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}
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defer subscription.Cancel()
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if subscription.hash != hash {
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t.Fatalf("expected subscription for provided hash")
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}
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// Add the invoice.
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amt := lnwire.MilliSatoshi(100000)
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_, err = registry.AddInvoice(testInvoice, hash)
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if err != nil {
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t.Fatal(err)
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}
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// We expect the open state to be sent to the single invoice subscriber.
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select {
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case update := <-subscription.Updates:
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if update.Terms.State != channeldb.ContractOpen {
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t.Fatalf(
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"expected state ContractOpen, but got %v",
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update.Terms.State,
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)
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}
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case <-time.After(testTimeout):
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t.Fatal("no update received")
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}
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// We expect a new invoice notification to be sent out.
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select {
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case newInvoice := <-allSubscriptions.NewInvoices:
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if newInvoice.Terms.State != channeldb.ContractOpen {
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t.Fatalf(
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"expected state ContractOpen, but got %v",
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newInvoice.Terms.State,
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)
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}
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case <-time.After(testTimeout):
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t.Fatal("no update received")
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}
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// Cancel invoice.
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err = registry.CancelInvoice(hash)
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if err != nil {
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t.Fatal(err)
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}
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// We expect the canceled state to be sent to the single invoice
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// subscriber.
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select {
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case update := <-subscription.Updates:
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if update.Terms.State != channeldb.ContractCanceled {
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t.Fatalf(
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"expected state ContractCanceled, but got %v",
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update.Terms.State,
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)
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}
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case <-time.After(testTimeout):
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t.Fatal("no update received")
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}
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// We expect no cancel notification to be sent to all invoice
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// subscribers (backwards compatibility).
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// Try to cancel again.
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err = registry.CancelInvoice(hash)
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if err != nil {
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t.Fatal("expected cancelation of a canceled invoice to succeed")
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}
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// Notify arrival of a new htlc paying to this invoice. This should
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// succeed.
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hodlChan := make(chan interface{})
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event, err := registry.NotifyExitHopHtlc(
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hash, amt, testInvoiceExpiry, testCurrentHeight, hodlChan, nil,
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)
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if err != nil {
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t.Fatal("expected settlement of a canceled invoice to succeed")
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}
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if event.Preimage != nil {
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t.Fatal("expected cancel hodl event")
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}
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}
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// TestHoldInvoice tests settling of a hold invoice and related notifications.
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func TestHoldInvoice(t *testing.T) {
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defer timeout(t)()
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cdb, cleanup, err := newDB()
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defer cleanup()
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// Instantiate and start the invoice registry.
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registry := NewRegistry(cdb, decodeExpiry, testFinalCltvRejectDelta)
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err = registry.Start()
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if err != nil {
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t.Fatal(err)
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}
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defer registry.Stop()
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allSubscriptions := registry.SubscribeNotifications(0, 0)
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defer allSubscriptions.Cancel()
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// Subscribe to the not yet existing invoice.
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subscription, err := registry.SubscribeSingleInvoice(hash)
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if err != nil {
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t.Fatal(err)
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}
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defer subscription.Cancel()
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if subscription.hash != hash {
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t.Fatalf("expected subscription for provided hash")
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}
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// Add the invoice.
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invoice := &channeldb.Invoice{
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Terms: channeldb.ContractTerm{
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PaymentPreimage: channeldb.UnknownPreimage,
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Value: lnwire.MilliSatoshi(100000),
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},
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}
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_, err = registry.AddInvoice(invoice, hash)
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if err != nil {
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t.Fatal(err)
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}
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// We expect the open state to be sent to the single invoice subscriber.
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update := <-subscription.Updates
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if update.Terms.State != channeldb.ContractOpen {
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t.Fatalf("expected state ContractOpen, but got %v",
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update.Terms.State)
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}
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// We expect a new invoice notification to be sent out.
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newInvoice := <-allSubscriptions.NewInvoices
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if newInvoice.Terms.State != channeldb.ContractOpen {
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t.Fatalf("expected state ContractOpen, but got %v",
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newInvoice.Terms.State)
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}
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// Use slightly higher amount for accept/settle.
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amtPaid := lnwire.MilliSatoshi(100500)
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hodlChan := make(chan interface{}, 1)
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// NotifyExitHopHtlc without a preimage present in the invoice registry
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// should be possible.
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event, err := registry.NotifyExitHopHtlc(
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hash, amtPaid, testInvoiceExpiry, testCurrentHeight, hodlChan,
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nil,
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)
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if err != nil {
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t.Fatalf("expected settle to succeed but got %v", err)
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}
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if event != nil {
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t.Fatalf("unexpect direct settle")
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}
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// Test idempotency.
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event, err = registry.NotifyExitHopHtlc(
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hash, amtPaid, testInvoiceExpiry, testCurrentHeight, hodlChan,
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nil,
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)
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if err != nil {
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t.Fatalf("expected settle to succeed but got %v", err)
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}
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if event != nil {
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t.Fatalf("unexpect direct settle")
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}
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// We expect the accepted state to be sent to the single invoice
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// subscriber. For all invoice subscribers, we don't expect an update.
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// Those only get notified on settle.
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update = <-subscription.Updates
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if update.Terms.State != channeldb.ContractAccepted {
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t.Fatalf("expected state ContractAccepted, but got %v",
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update.Terms.State)
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}
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if update.AmtPaid != amtPaid {
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t.Fatal("invoice AmtPaid incorrect")
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}
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// Settling with preimage should succeed.
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err = registry.SettleHodlInvoice(preimage)
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if err != nil {
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t.Fatal("expected set preimage to succeed")
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}
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hodlEvent := (<-hodlChan).(HodlEvent)
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if *hodlEvent.Preimage != preimage {
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t.Fatal("unexpected preimage in hodl event")
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}
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// We expect a settled notification to be sent out for both all and
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// single invoice subscribers.
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settledInvoice := <-allSubscriptions.SettledInvoices
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if settledInvoice.Terms.State != channeldb.ContractSettled {
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t.Fatalf("expected state ContractSettled, but got %v",
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settledInvoice.Terms.State)
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}
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update = <-subscription.Updates
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if update.Terms.State != channeldb.ContractSettled {
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t.Fatalf("expected state ContractSettled, but got %v",
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update.Terms.State)
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}
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// Idempotency.
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err = registry.SettleHodlInvoice(preimage)
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if err != channeldb.ErrInvoiceAlreadySettled {
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t.Fatalf("expected ErrInvoiceAlreadySettled but got %v", err)
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}
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// Try to cancel.
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err = registry.CancelInvoice(hash)
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if err == nil {
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t.Fatal("expected cancelation of a settled invoice to fail")
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}
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}
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func newDB() (*channeldb.DB, func(), error) {
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// First, create a temporary directory to be used for the duration of
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// this test.
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tempDirName, err := ioutil.TempDir("", "channeldb")
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if err != nil {
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return nil, nil, err
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}
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// Next, create channeldb for the first time.
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cdb, err := channeldb.Open(tempDirName)
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if err != nil {
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os.RemoveAll(tempDirName)
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return nil, nil, err
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}
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cleanUp := func() {
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cdb.Close()
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os.RemoveAll(tempDirName)
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}
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return cdb, cleanUp, nil
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}
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// TestUnknownInvoice tests that invoice registry returns an error when the
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// invoice is unknown. This is to guard against returning a cancel hodl event
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// for forwarded htlcs. In the link, NotifyExitHopHtlc is only called if we are
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// the exit hop, but in htlcIncomingContestResolver it is called with forwarded
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// htlc hashes as well.
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func TestUnknownInvoice(t *testing.T) {
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registry, cleanup := newTestContext(t)
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defer cleanup()
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// Notify arrival of a new htlc paying to this invoice. This should
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// succeed.
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hodlChan := make(chan interface{})
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amt := lnwire.MilliSatoshi(100000)
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_, err := registry.NotifyExitHopHtlc(
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hash, amt, testInvoiceExpiry, testCurrentHeight, hodlChan, nil,
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)
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if err != channeldb.ErrInvoiceNotFound {
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t.Fatal("expected invoice not found error")
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}
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}
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