add a test to verify tag is persisted

itest/cln_lspd_node.go

@@ -217,3 +217,6 @@ func (l *ClnLspNode) LightningNode() lntest.LightningNode {
 func (l *ClnLspNode) SupportsChargingFees() bool {
 	return false
 }
+func (l *ClnLspNode) PostgresBackend() *PostgresContainer {
+	return l.lspBase.postgresBackend
+}

itest/lnd_lspd_node.go

@@ -240,3 +240,7 @@ func (l *LndLspNode) NodeId() []byte {
 func (l *LndLspNode) LightningNode() lntest.LightningNode {
 	return l.lightningNode
 }
+
+func (l *LndLspNode) PostgresBackend() *PostgresContainer {
+	return l.lspBase.postgresBackend
+}

itest/lspd_node.go

@@ -43,6 +43,7 @@ type LspNode interface {
 	NodeId() []byte
 	LightningNode() lntest.LightningNode
 	SupportsChargingFees() bool
+	PostgresBackend() *PostgresContainer
 }
 
 type lspBase struct {

itest/lspd_test.go

@@ -101,4 +101,8 @@ var allTestCases = []*testCase{
 		name: "testInvalidCltv",
 		test: testInvalidCltv,
 	},
+	{
+		name: "registerPaymentWithTag",
+		test: registerPaymentWithTag,
+	},
 }

itest/tag_test.go

@@ -0,0 +1,55 @@
+package itest
+
+import (
+	"log"
+
+	"github.com/breez/lntest"
+	lspd "github.com/breez/lspd/rpc"
+	"github.com/jackc/pgx/v4/pgxpool"
+	"github.com/stretchr/testify/assert"
+)
+
+func registerPaymentWithTag(p *testParams) {
+	expected := "{\"apiKey\": \"11111111111111\"}"
+	i := p.BreezClient().Node().CreateBolt11Invoice(&lntest.CreateInvoiceOptions{
+		AmountMsat: 25000000,
+	})
+
+	log.Printf("Registering payment with lsp")
+	RegisterPayment(p.lsp, &lspd.PaymentInformation{
+		PaymentHash:        i.PaymentHash,
+		PaymentSecret:      i.PaymentSecret,
+		Destination:        p.BreezClient().Node().NodeId(),
+		IncomingAmountMsat: int64(25000000),
+		OutgoingAmountMsat: int64(21000000),
+		Tag:                expected,
+	})
+
+	pgxPool, err := pgxpool.Connect(p.h.Ctx, p.lsp.PostgresBackend().ConnectionString())
+	if err != nil {
+		p.h.T.Fatalf("Failed to connect to postgres backend: %v", err)
+	}
+	defer pgxPool.Close()
+
+	rows, err := pgxPool.Query(
+		p.h.Ctx,
+		"SELECT tag FROM public.payments WHERE payment_hash=$1",
+		i.PaymentHash,
+	)
+	if err != nil {
+		p.h.T.Fatalf("Failed to query tag: %v", err)
+	}
+
+	defer rows.Close()
+	if !rows.Next() {
+		p.h.T.Fatal("No rows found")
+	}
+
+	var actual string
+	err = rows.Scan(&actual)
+	if err != nil {
+		p.h.T.Fatalf("Failed to get tag from row: %v", err)
+	}
+
+	assert.Equal(p.h.T, expected, actual)
+}