Spend unconfirmed utxos if minconfs=0

cln_client.go

@@ -76,7 +76,11 @@ func (c *ClnClient) IsConnected(destination []byte) (bool, error) {
 
 func (c *ClnClient) OpenChannel(req *OpenChannelRequest) (*wire.OutPoint, error) {
 	pubkey := hex.EncodeToString(req.Destination)
-	minConfs := uint16(req.MinConfs)
+	var minConfs *uint16
+	if req.MinConfs != nil {
+		m := uint16(*req.MinConfs)
+		minConfs = &m
+	}
 	var minDepth *uint16
 	if req.IsZeroConf {
 		var d uint16 = 0
@@ -110,7 +114,7 @@ func (c *ClnClient) OpenChannel(req *OpenChannelRequest) (*wire.OutPoint, error)
 		glightning.NewSat(int(req.CapacitySat)),
 		rate,
 		!req.IsPrivate,
-		&minConfs,
+		minConfs,
 		glightning.NewMsat(0),
 		minDepth,
 		glightning.NewSat(0),

cln_interceptor.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"github.com/breez/lspd/cln_plugin/proto"
+	"github.com/breez/lspd/config"
 	sphinx "github.com/lightningnetwork/lightning-onion"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/record"
@@ -23,7 +24,7 @@ import (
 )
 
 type ClnHtlcInterceptor struct {
-	config        *NodeConfig
+	config        *config.NodeConfig
 	pluginAddress string
 	client        *ClnClient
 	pluginClient  proto.ClnPluginClient
@@ -34,7 +35,7 @@ type ClnHtlcInterceptor struct {
 	cancel        context.CancelFunc
 }
 
-func NewClnHtlcInterceptor(conf *NodeConfig) (*ClnHtlcInterceptor, error) {
+func NewClnHtlcInterceptor(conf *config.NodeConfig) (*ClnHtlcInterceptor, error) {
 	if conf.Cln == nil {
 		return nil, fmt.Errorf("missing cln config")
 	}

config/config.go

@@ -1,4 +1,4 @@
-package main
+package config
 
 type NodeConfig struct {
 	// Name of the LSP. If empty, the node's alias will be taken instead.
@@ -35,7 +35,7 @@ type NodeConfig struct {
 
 	// Minimum number of confirmations inputs for zero conf channel opens should
 	// have.
-	MinConfs uint32 `json:"minConfs,string"`
+	MinConfs *uint32 `json:"minConfs,string"`
 
 	// Smallest htlc amount routed over channels opened with the OpenChannel
 	// rpc call.

go.mod

@@ -4,7 +4,7 @@ go 1.19
 
 require (
 	github.com/aws/aws-sdk-go v1.30.20
-	github.com/breez/lntest v0.0.18
+	github.com/breez/lntest v0.0.19
 	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

intercept.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"github.com/breez/lspd/chain"
+	"github.com/breez/lspd/config"
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/wire"
 	sphinx "github.com/lightningnetwork/lightning-onion"
@@ -49,7 +50,7 @@ type interceptResult struct {
 	onionBlob    []byte
 }
 
-func intercept(client LightningClient, config *NodeConfig, nextHop string, reqPaymentHash []byte, reqOutgoingAmountMsat uint64, reqOutgoingExpiry uint32, reqIncomingExpiry uint32) interceptResult {
+func intercept(client LightningClient, config *config.NodeConfig, nextHop string, reqPaymentHash []byte, reqOutgoingAmountMsat uint64, reqOutgoingExpiry uint32, reqIncomingExpiry uint32) interceptResult {
 	reqPaymentHashStr := hex.EncodeToString(reqPaymentHash)
 	resp, _, _ := payHashGroup.Do(reqPaymentHashStr, func() (interface{}, error) {
 		paymentHash, paymentSecret, destination, incomingAmountMsat, outgoingAmountMsat, channelPoint, err := paymentInfo(reqPaymentHash)
@@ -224,7 +225,7 @@ func intercept(client LightningClient, config *NodeConfig, nextHop string, reqPa
 	return resp.(interceptResult)
 }
 
-func checkPayment(config *NodeConfig, incomingAmountMsat, outgoingAmountMsat int64) error {
+func checkPayment(config *config.NodeConfig, incomingAmountMsat, outgoingAmountMsat int64) error {
 	fees := incomingAmountMsat * config.ChannelFeePermyriad / 10_000 / 1_000 * 1_000
 	if fees < config.ChannelMinimumFeeMsat {
 		fees = config.ChannelMinimumFeeMsat
@@ -235,7 +236,7 @@ func checkPayment(config *NodeConfig, incomingAmountMsat, outgoingAmountMsat int
 	return nil
 }
 
-func openChannel(client LightningClient, config *NodeConfig, paymentHash, destination []byte, incomingAmountMsat int64) (*wire.OutPoint, error) {
+func openChannel(client LightningClient, config *config.NodeConfig, paymentHash, destination []byte, incomingAmountMsat int64) (*wire.OutPoint, error) {
 	capacity := incomingAmountMsat/1000 + config.AdditionalChannelCapacity
 	if capacity == config.PublicChannelAmount {
 		capacity++

itest/cln_lspd_node.go

@@ -11,6 +11,7 @@ import (
 	"syscall"
 
 	"github.com/breez/lntest"
+	"github.com/breez/lspd/config"
 	lspd "github.com/breez/lspd/rpc"
 	"github.com/btcsuite/btcd/btcec/v2"
 	ecies "github.com/ecies/go/v2"
@@ -41,7 +42,7 @@ type clnLspNodeRuntime struct {
 	cleanups []*lntest.Cleanup
 }
 
-func NewClnLspdNode(h *lntest.TestHarness, m *lntest.Miner, name string) LspNode {
+func NewClnLspdNode(h *lntest.TestHarness, m *lntest.Miner, name string, nodeConfig *config.NodeConfig) LspNode {
 	scriptDir := h.GetDirectory("lspd")
 	pluginBinary := *clnPluginExec
 	pluginPort, err := lntest.GetPort()
@@ -60,12 +61,11 @@ func NewClnLspdNode(h *lntest.TestHarness, m *lntest.Miner, name string) LspNode
 		"--dev-allowdustreserve=true",
 	}
 	lightningNode := lntest.NewClnNode(h, m, name, args...)
-	cln := fmt.Sprintf(
+	cln := &config.ClnConfig{
-		`{ "pluginAddress": "%s", "socketPath": "%s" }`,
+		PluginAddress: pluginAddress,
-		pluginAddress,
+		SocketPath:    filepath.Join(lightningNode.SocketDir(), lightningNode.SocketFile()),
-		filepath.Join(lightningNode.SocketDir(), lightningNode.SocketFile()),
+	}
-	)
+	lspbase, err := newLspd(h, name, nodeConfig, nil, cln)
-	lspbase, err := newLspd(h, name, nil, &cln)
 	if err != nil {
 		h.T.Fatalf("failed to initialize lspd")
 	}

itest/config_test.go

@@ -19,7 +19,7 @@ func TestConfigParameters(t *testing.T) {
 	m := lntest.NewMiner(h)
 	m.Start()
 
-	lsp := NewClnLspdNode(h, m, "lsp")
+	lsp := NewClnLspdNode(h, m, "lsp", nil)
 	lsp.Start()
 
 	log.Printf("Waiting %v to allow lsp server to activate.", htlcInterceptorDelay)

itest/lnd_lspd_node.go

@@ -13,6 +13,7 @@ import (
 	"syscall"
 
 	"github.com/breez/lntest"
+	"github.com/breez/lspd/config"
 	lspd "github.com/breez/lspd/rpc"
 	"github.com/btcsuite/btcd/btcec/v2"
 	ecies "github.com/ecies/go/v2"
@@ -37,7 +38,7 @@ type lndLspNodeRuntime struct {
 	cleanups []*lntest.Cleanup
 }
 
-func NewLndLspdNode(h *lntest.TestHarness, m *lntest.Miner, name string) LspNode {
+func NewLndLspdNode(h *lntest.TestHarness, m *lntest.Miner, name string, nodeConfig *config.NodeConfig) LspNode {
 	args := []string{
 		"--protocol.zero-conf",
 		"--protocol.option-scid-alias",
@@ -50,12 +51,12 @@ func NewLndLspdNode(h *lntest.TestHarness, m *lntest.Miner, name string) LspNode
 	}
 
 	lightningNode := lntest.NewLndNode(h, m, name, args...)
-	j, _ := json.Marshal(map[string]string{
+	lnd := &config.LndConfig{
-		"address":  lightningNode.GrpcHost(),
+		Address:  lightningNode.GrpcHost(),
-		"cert":     string(lightningNode.TlsCert()),
+		Cert:     string(lightningNode.TlsCert()),
-		"macaroon": hex.EncodeToString(lightningNode.Macaroon())})
+		Macaroon: hex.EncodeToString(lightningNode.Macaroon()),
-	lnd := string(j)
+	}
-	lspBase, err := newLspd(h, name, &lnd, nil)
+	lspBase, err := newLspd(h, name, nodeConfig, lnd, nil)
 	if err != nil {
 		h.T.Fatalf("failed to initialize lspd")
 	}

itest/lspd_node.go

@@ -3,6 +3,8 @@ package itest
 import (
 	"bufio"
 	"context"
+	"encoding/hex"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"log"
@@ -11,6 +13,7 @@ import (
 	"path/filepath"
 
 	"github.com/breez/lntest"
+	"github.com/breez/lspd/config"
 	lspd "github.com/breez/lspd/rpc"
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4"
@@ -58,7 +61,7 @@ type lspBase struct {
 	postgresBackend *PostgresContainer
 }
 
-func newLspd(h *lntest.TestHarness, name string, lnd *string, cln *string, envExt ...string) (*lspBase, error) {
+func newLspd(h *lntest.TestHarness, name string, nodeConfig *config.NodeConfig, lnd *config.LndConfig, cln *config.ClnConfig, envExt ...string) (*lspBase, error) {
 	scriptDir := h.GetDirectory(fmt.Sprintf("lspd-%s", name))
 	log.Printf("%s: Creating LSPD in dir %s", name, scriptDir)
 
@@ -88,32 +91,45 @@ func newLspd(h *lntest.TestHarness, name string, lnd *string, cln *string, envEx
 	eciesPubl := ecies.NewPrivateKeyFromBytes(lspdPrivateKeyBytes).PublicKey
 	host := "localhost"
 	grpcAddress := fmt.Sprintf("%s:%d", host, lspdPort)
-	var ext string
+	minConfs := uint32(1)
-	if lnd != nil {
+	conf := &config.NodeConfig{
-		ext = fmt.Sprintf(`"lnd": %s`, *lnd)
+		Name:                      name,
-	} else if cln != nil {
+		LspdPrivateKey:            hex.EncodeToString(lspdPrivateKeyBytes),
-		ext = fmt.Sprintf(`"cln": %s`, *cln)
+		Token:                     "hello",
-	} else {
+		Host:                      "host:port",
-		h.T.Fatalf("%s: need either lnd or cln config", name)
+		PublicChannelAmount:       1000183,
+		ChannelAmount:             100000,
+		ChannelPrivate:            false,
+		TargetConf:                6,
+		MinConfs:                  &minConfs,
+		MinHtlcMsat:               600,
+		BaseFeeMsat:               1000,
+		FeeRate:                   0.000001,
+		TimeLockDelta:             144,
+		ChannelFeePermyriad:       40,
+		ChannelMinimumFeeMsat:     2000000,
+		AdditionalChannelCapacity: 100000,
+		MaxInactiveDuration:       3888000,
+		Lnd:                       lnd,
+		Cln:                       cln,
 	}
 
-	nodes := fmt.Sprintf(
+	if nodeConfig != nil {
-		`NODES='[ { "name": "%s", "lspdPrivateKey": "%x", "token": "hello", "host": "host:port",`+
+		if nodeConfig.MinConfs != nil {
-			` "publicChannelAmount": "1000183", "channelAmount": "100000", "channelPrivate": false,`+
+			conf.MinConfs = nodeConfig.MinConfs
-			` "targetConf": "6", "minConfs": "1", "minHtlcMsat": "600", "baseFeeMsat": "1000", "feeRate": "0.000001",`+
+		}
-			` "timeLockDelta": "144", "channelFeePermyriad": "40", "channelMinimumFeeMsat": "2000000",`+
+	}
-			` "additionalChannelCapacity": "100000", "maxInactiveDuration": "3888000", %s}]'`,
+
-		name,
+	log.Printf("%+v", conf)
-		lspdPrivateKeyBytes,
+	confJson, _ := json.Marshal(conf)
-		ext,
+	nodes := fmt.Sprintf(`NODES='[%s]'`, string(confJson))
-	)
 	env := []string{
 		nodes,
 		fmt.Sprintf("DATABASE_URL=%s", postgresBackend.ConnectionString()),
 		fmt.Sprintf("LISTEN_ADDRESS=%s", grpcAddress),
-		fmt.Sprintf("USE_MEMPOOL_FEE_ESTIMATION=true"),
+		"USE_MEMPOOL_FEE_ESTIMATION=true",
-		fmt.Sprintf("MEMPOOL_API_BASE_URL=https://mempool.space/api/v1/"),
+		"MEMPOOL_API_BASE_URL=https://mempool.space/api/v1/",
-		fmt.Sprintf("MEMPOOL_PRIORITY=economy"),
+		"MEMPOOL_PRIORITY=economy",
 	}
 
 	env = append(env, envExt...)

itest/lspd_test.go

@@ -7,31 +7,55 @@ import (
 	"time"
 
 	"github.com/breez/lntest"
+	"github.com/breez/lspd/config"
 )
 
 var defaultTimeout time.Duration = time.Second * 120
 
 func TestLspd(t *testing.T) {
 	testCases := allTestCases
-	runTests(t, testCases, "LND-lspd", func(h *lntest.TestHarness, m *lntest.Miner) (LspNode, BreezClient) {
+	runTests(t, testCases, "LND-lspd", lndLspFunc, lndClientFunc)
-		return NewLndLspdNode(h, m, "lsp"), newLndBreezClient(h, m, "breez-client")
+	runTests(t, testCases, "CLN-lspd", clnLspFunc, clnClientFunc)
-	})
-
-	runTests(t, testCases, "CLN-lspd", func(h *lntest.TestHarness, m *lntest.Miner) (LspNode, BreezClient) {
-		return NewClnLspdNode(h, m, "lsp"), newClnBreezClient(h, m, "breez-client")
-	})
 }
 
-func runTests(t *testing.T, testCases []*testCase, prefix string, nodesFunc func(h *lntest.TestHarness, m *lntest.Miner) (LspNode, BreezClient)) {
+func lndLspFunc(h *lntest.TestHarness, m *lntest.Miner, c *config.NodeConfig) LspNode {
+	return NewLndLspdNode(h, m, "lsp", c)
+}
+
+func clnLspFunc(h *lntest.TestHarness, m *lntest.Miner, c *config.NodeConfig) LspNode {
+	return NewClnLspdNode(h, m, "lsp", c)
+}
+
+func lndClientFunc(h *lntest.TestHarness, m *lntest.Miner) BreezClient {
+	return newLndBreezClient(h, m, "breez-client")
+}
+
+func clnClientFunc(h *lntest.TestHarness, m *lntest.Miner) BreezClient {
+	return newClnBreezClient(h, m, "breez-client")
+}
+
+func runTests(
+	t *testing.T,
+	testCases []*testCase,
+	prefix string,
+	lspFunc LspFunc,
+	clientFunc ClientFunc,
+) {
 	for _, testCase := range testCases {
 		testCase := testCase
 		t.Run(fmt.Sprintf("%s: %s", prefix, testCase.name), func(t *testing.T) {
-			runTest(t, testCase, prefix, nodesFunc)
+			runTest(t, testCase, prefix, lspFunc, clientFunc)
 		})
 	}
 }
 
-func runTest(t *testing.T, testCase *testCase, prefix string, nodesFunc func(h *lntest.TestHarness, m *lntest.Miner) (LspNode, BreezClient)) {
+func runTest(
+	t *testing.T,
+	testCase *testCase,
+	prefix string,
+	lspFunc LspFunc,
+	clientFunc ClientFunc,
+) {
 	log.Printf("%s: Running test case '%s'", prefix, testCase.name)
 	var dd time.Duration
 	to := testCase.timeout
@@ -49,8 +73,12 @@ func runTest(t *testing.T, testCase *testCase, prefix string, nodesFunc func(h *
 	miner := lntest.NewMiner(h)
 	miner.Start()
 	log.Printf("Creating lsp")
-	lsp, c := nodesFunc(h, miner)
+	var lsp LspNode
+	if !testCase.skipCreateLsp {
+		lsp = lspFunc(h, miner, nil)
 		lsp.Start()
+	}
+	c := clientFunc(h, miner)
 	c.Start()
 	log.Printf("Run testcase")
 	testCase.test(&testParams{
@@ -59,12 +87,15 @@ func runTest(t *testing.T, testCase *testCase, prefix string, nodesFunc func(h *
 		m:          miner,
 		c:          c,
 		lsp:        lsp,
+		lspFunc:    lspFunc,
+		clientFunc: clientFunc,
 	})
 }
 
 type testCase struct {
 	name          string
 	test          func(t *testParams)
+	skipCreateLsp bool
 	timeout       time.Duration
 }
 
@@ -105,4 +136,9 @@ var allTestCases = []*testCase{
 		name: "registerPaymentWithTag",
 		test: registerPaymentWithTag,
 	},
+	{
+		name:          "testOpenZeroConfUtxo",
+		test:          testOpenZeroConfUtxo,
+		skipCreateLsp: true,
+	},
 }

itest/test_params.go

@@ -4,14 +4,20 @@ import (
 	"testing"
 
 	"github.com/breez/lntest"
+	"github.com/breez/lspd/config"
 )
 
+type LspFunc func(h *lntest.TestHarness, m *lntest.Miner, c *config.NodeConfig) LspNode
+type ClientFunc func(h *lntest.TestHarness, m *lntest.Miner) BreezClient
+
 type testParams struct {
 	t          *testing.T
 	h          *lntest.TestHarness
 	m          *lntest.Miner
 	c          BreezClient
 	lsp        LspNode
+	lspFunc    LspFunc
+	clientFunc ClientFunc
 }
 
 func (h *testParams) T() *testing.T {

itest/zero_conf_utxo_test.go

@@ -0,0 +1,72 @@
+package itest
+
+import (
+	"log"
+	"time"
+
+	"github.com/breez/lntest"
+	"github.com/breez/lspd/config"
+	lspd "github.com/breez/lspd/rpc"
+	"github.com/stretchr/testify/assert"
+)
+
+func testOpenZeroConfUtxo(p *testParams) {
+	alice := lntest.NewClnNode(p.h, p.m, "Alice")
+	alice.Start()
+	alice.Fund(10000000)
+
+	minConfs := uint32(0)
+	lsp := p.lspFunc(p.h, p.m, &config.NodeConfig{MinConfs: &minConfs})
+	lsp.Start()
+
+	log.Print("Opening channel between Alice and the lsp")
+	channel := alice.OpenChannel(lsp.LightningNode(), &lntest.OpenChannelOptions{
+		AmountSat: publicChanAmount,
+	})
+	channelId := alice.WaitForChannelReady(channel)
+
+	// Send an unconfirmed utxo to the lsp
+	initialHeight := p.m.GetBlockHeight()
+	addr := lsp.LightningNode().GetNewAddress()
+	p.m.SendToAddress(addr, 200000)
+
+	log.Printf("Adding bob's invoices")
+	outerAmountMsat := uint64(2100000)
+	innerAmountMsat, lspAmountMsat := calculateInnerAmountMsat(lsp, outerAmountMsat)
+	description := "Please pay me"
+	innerInvoice, outerInvoice := GenerateInvoices(p.BreezClient(),
+		generateInvoicesRequest{
+			innerAmountMsat: innerAmountMsat,
+			outerAmountMsat: outerAmountMsat,
+			description:     description,
+			lsp:             lsp,
+		})
+
+	log.Print("Connecting bob to lspd")
+	p.BreezClient().Node().ConnectPeer(lsp.LightningNode())
+
+	log.Printf("Registering payment with lsp")
+	RegisterPayment(lsp, &lspd.PaymentInformation{
+		PaymentHash:        innerInvoice.paymentHash,
+		PaymentSecret:      innerInvoice.paymentSecret,
+		Destination:        p.BreezClient().Node().NodeId(),
+		IncomingAmountMsat: int64(outerAmountMsat),
+		OutgoingAmountMsat: int64(lspAmountMsat),
+	})
+
+	// TODO: Fix race waiting for htlc interceptor.
+	log.Printf("Waiting %v to allow htlc interceptor to activate.", htlcInterceptorDelay)
+	<-time.After(htlcInterceptorDelay)
+	log.Printf("Alice paying")
+	route := constructRoute(lsp.LightningNode(), p.BreezClient().Node(), channelId, lntest.NewShortChanIDFromString("1x0x0"), outerAmountMsat)
+	payResp, err := alice.PayViaRoute(outerAmountMsat, outerInvoice.paymentHash, outerInvoice.paymentSecret, route)
+	lntest.CheckError(p.t, err)
+	bobInvoice := p.BreezClient().Node().GetInvoice(payResp.PaymentHash)
+
+	assert.Equal(p.t, payResp.PaymentPreimage, bobInvoice.PaymentPreimage)
+	assert.Equal(p.t, innerAmountMsat, bobInvoice.AmountReceivedMsat)
+
+	// Make sure there's not accidently a block mined in between
+	finalHeight := p.m.GetBlockHeight()
+	assert.Equal(p.t, initialHeight, finalHeight)
+}

lightning_client.go

@@ -21,7 +21,7 @@ type OpenChannelRequest struct {
 	MinHtlcMsat    uint64
 	IsPrivate      bool
 	IsZeroConf     bool
-	MinConfs       uint32
+	MinConfs       *uint32
 	FeeSatPerVByte *float64
 	TargetConf     *uint32
 }

lnd_client.go

@@ -8,6 +8,7 @@ import (
 	"log"
 
 	"github.com/breez/lspd/basetypes"
+	"github.com/breez/lspd/config"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/lightningnetwork/lnd/htlcswitch/hop"
 	"github.com/lightningnetwork/lnd/lnrpc"
@@ -24,7 +25,7 @@ type LndClient struct {
 	conn                *grpc.ClientConn
 }
 
-func NewLndClient(conf *LndConfig) (*LndClient, error) {
+func NewLndClient(conf *config.LndConfig) (*LndClient, error) {
 	_, err := hex.DecodeString(conf.Macaroon)
 	if err != nil {
 		return nil, fmt.Errorf("failed to decode macaroon: %w", err)
@@ -103,7 +104,14 @@ func (c *LndClient) OpenChannel(req *OpenChannelRequest) (*wire.OutPoint, error)
 		Private:            req.IsPrivate,
 		CommitmentType:     lnrpc.CommitmentType_ANCHORS,
 		ZeroConf:           req.IsZeroConf,
-		MinConfs:           int32(req.MinConfs),
+	}
+
+	if req.MinConfs != nil {
+		minConfs := *req.MinConfs
+		lnReq.MinConfs = int32(minConfs)
+		if minConfs == 0 {
+			lnReq.SpendUnconfirmed = true
+		}
 	}
 
 	if req.FeeSatPerVByte != nil {

lnd_interceptor.go

@@ -7,6 +7,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/breez/lspd/config"
 	"github.com/lightningnetwork/lnd/lnrpc"
 	"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
 	"google.golang.org/grpc/codes"
@@ -14,7 +15,7 @@ import (
 )
 
 type LndHtlcInterceptor struct {
-	config        *NodeConfig
+	config        *config.NodeConfig
 	client        *LndClient
 	stopRequested bool
 	initWg        sync.WaitGroup
@@ -23,7 +24,7 @@ type LndHtlcInterceptor struct {
 	cancel        context.CancelFunc
 }
 
-func NewLndHtlcInterceptor(conf *NodeConfig) (*LndHtlcInterceptor, error) {
+func NewLndHtlcInterceptor(conf *config.NodeConfig) (*LndHtlcInterceptor, error) {
 	if conf.Lnd == nil {
 		return nil, fmt.Errorf("missing lnd configuration")
 	}

main.go

@@ -11,6 +11,7 @@ import (
 	"syscall"
 
 	"github.com/breez/lspd/chain"
+	"github.com/breez/lspd/config"
 	"github.com/breez/lspd/mempool"
 	"github.com/btcsuite/btcd/btcec/v2"
 )
@@ -26,7 +27,7 @@ func main() {
 	}
 
 	n := os.Getenv("NODES")
-	var nodes []*NodeConfig
+	var nodes []*config.NodeConfig
 	err := json.Unmarshal([]byte(n), &nodes)
 	if err != nil {
 		log.Fatalf("failed to unmarshal NODES env: %v", err)

server.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/breez/lspd/btceclegacy"
+	"github.com/breez/lspd/config"
 	lspdrpc "github.com/breez/lspd/rpc"
 	ecies "github.com/ecies/go/v2"
 	"github.com/golang/protobuf/proto"
@@ -39,7 +40,7 @@ type server struct {
 
 type node struct {
 	client              LightningClient
-	nodeConfig          *NodeConfig
+	nodeConfig          *config.NodeConfig
 	privateKey          *btcec.PrivateKey
 	publicKey           *btcec.PublicKey
 	eciesPrivateKey     *ecies.PrivateKey
@@ -259,7 +260,7 @@ func (s *server) CheckChannels(ctx context.Context, in *lspdrpc.Encrypted) (*lsp
 	return &lspdrpc.Encrypted{Data: encrypted}, nil
 }
 
-func NewGrpcServer(configs []*NodeConfig, address string, certmagicDomain string) (*server, error) {
+func NewGrpcServer(configs []*config.NodeConfig, address string, certmagicDomain string) (*server, error) {
 	if len(configs) == 0 {
 		return nil, fmt.Errorf("no nodes supplied")
 	}