make cln client recoverable after cln connection loss

itest/restart_lsp_node_test.go

@@ -0,0 +1,75 @@
+package itest
+
+import (
+	"log"
+	"time"
+
+	"github.com/breez/lntest"
+	lspd "github.com/breez/lspd/rpc"
+	"github.com/stretchr/testify/assert"
+)
+
+func testRestartLspNode(p *testParams) {
+	alice := lntest.NewClnNode(p.h, p.m, "Alice")
+	alice.Start()
+	alice.Fund(10000000)
+	p.lsp.LightningNode().Fund(10000000)
+
+	log.Print("Opening channel between Alice and the lsp")
+	channel := alice.OpenChannel(p.lsp.LightningNode(), &lntest.OpenChannelOptions{
+		AmountSat: publicChanAmount,
+	})
+	alice.WaitForChannelReady(channel)
+
+	log.Printf("Adding bob's invoices")
+	outerAmountMsat := uint64(2100000)
+	innerAmountMsat := calculateInnerAmountMsat(p.lsp, outerAmountMsat, nil)
+	description := "Please pay me"
+	innerInvoice, outerInvoice := GenerateInvoices(p.BreezClient(),
+		generateInvoicesRequest{
+			innerAmountMsat: innerAmountMsat,
+			outerAmountMsat: outerAmountMsat,
+			description:     description,
+			lsp:             p.lsp,
+		})
+	p.BreezClient().SetHtlcAcceptor(innerAmountMsat)
+
+	log.Print("Connecting bob to lspd")
+	p.BreezClient().Node().ConnectPeer(p.lsp.LightningNode())
+
+	log.Printf("Registering payment with lsp")
+	RegisterPayment(p.lsp, &lspd.PaymentInformation{
+		PaymentHash:        innerInvoice.paymentHash,
+		PaymentSecret:      innerInvoice.paymentSecret,
+		Destination:        p.BreezClient().Node().NodeId(),
+		IncomingAmountMsat: int64(outerAmountMsat),
+		OutgoingAmountMsat: int64(innerAmountMsat),
+	}, false)
+
+	log.Printf("stopping lsp lightning node")
+	p.lsp.LightningNode().Stop()
+	log.Printf("waiting %v to allow lsp lightning node to stop completely", htlcInterceptorDelay)
+	<-time.After(htlcInterceptorDelay)
+	log.Printf("starting lsp lightning node again")
+	p.lsp.LightningNode().Start()
+
+	// TODO: Fix race waiting for htlc interceptor.
+	log.Printf("Waiting %v to allow htlc interceptor to activate.", htlcInterceptorDelay)
+	<-time.After(htlcInterceptorDelay)
+
+	log.Printf("Connect Bob to LSP again")
+	p.BreezClient().Node().ConnectPeer(p.lsp.LightningNode())
+
+	log.Printf("Alice paying")
+	payResp := alice.Pay(outerInvoice.bolt11)
+	bobInvoice := p.BreezClient().Node().GetInvoice(payResp.PaymentHash)
+
+	assert.Equal(p.t, payResp.PaymentPreimage, bobInvoice.PaymentPreimage)
+	assert.Equal(p.t, innerAmountMsat, bobInvoice.AmountReceivedMsat)
+
+	// Make sure capacity is correct
+	chans := p.BreezClient().Node().GetChannels()
+	assert.Equal(p.t, 1, len(chans))
+	c := chans[0]
+	AssertChannelCapacity(p.t, outerAmountMsat, c.CapacityMsat)
+}