add a test for regular forwards

go.mod

@@ -4,7 +4,7 @@ go 1.19
 
 require (
 	github.com/aws/aws-sdk-go v1.30.20
-	github.com/breez/lntest v0.0.13
+	github.com/breez/lntest v0.0.15
 	github.com/btcsuite/btcd v0.23.3
 	github.com/btcsuite/btcd/btcec/v2 v2.2.1
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1

itest/lspd_test.go

@@ -89,4 +89,8 @@ var allTestCases = []*testCase{
 		name: "testNoBalance",
 		test: testNoBalance,
 	},
+	{
+		name: "testRegularForward",
+		test: testRegularForward,
+	},
 }

itest/regular_forward_test.go

@@ -0,0 +1,53 @@
+package itest
+
+import (
+	"log"
+	"time"
+
+	"github.com/breez/lntest"
+	"github.com/stretchr/testify/assert"
+)
+
+func testRegularForward(p *testParams) {
+	alice := lntest.NewClnNode(p.h, p.m, "Alice")
+	alice.Start()
+	alice.Fund(10000000)
+	p.lsp.LightningNode().Fund(10000000)
+	p.BreezClient().Node().Fund(100000)
+
+	log.Print("Opening channel between Alice and the lsp")
+	channelAL := alice.OpenChannel(p.lsp.LightningNode(), &lntest.OpenChannelOptions{
+		AmountSat: publicChanAmount,
+		IsPublic:  true,
+	})
+
+	log.Print("Opening channel between lsp and Breez client")
+	channelLB := p.lsp.LightningNode().OpenChannel(p.BreezClient().Node(), &lntest.OpenChannelOptions{
+		AmountSat: 200000,
+		IsPublic:  false,
+	})
+
+	log.Print("Waiting for channel between Alice and the lsp to be ready.")
+	alice.WaitForChannelReady(channelAL)
+	log.Print("Waiting for channel between LSP and Bob to be ready.")
+	p.lsp.LightningNode().WaitForChannelReady(channelLB)
+	p.BreezClient().Node().WaitForChannelReady(channelLB)
+
+	// TODO: Fix race waiting for htlc interceptor.
+	log.Printf("Waiting %v to allow htlc interceptor to activate.", htlcInterceptorDelay)
+	<-time.After(htlcInterceptorDelay)
+
+	log.Printf("Adding bob's invoice")
+	amountMsat := uint64(2100000)
+	bobInvoice := p.BreezClient().Node().CreateBolt11Invoice(&lntest.CreateInvoiceOptions{
+		AmountMsat: amountMsat,
+	})
+	log.Printf(bobInvoice.Bolt11)
+
+	log.Printf("Alice paying")
+	payResp := alice.Pay(bobInvoice.Bolt11)
+	invoiceResult := p.BreezClient().Node().GetInvoice(bobInvoice.PaymentHash)
+
+	assert.Equal(p.t, payResp.PaymentPreimage, invoiceResult.PaymentPreimage)
+	assert.Equal(p.t, amountMsat, invoiceResult.AmountReceivedMsat)
+}