swap: add constructor for swap config

client.go

@@ -315,10 +315,7 @@ func (s *Client) Run(ctx context.Context,
 func (s *Client) resumeSwaps(ctx context.Context,
 	loopOutSwaps []*loopdb.LoopOut, loopInSwaps []*loopdb.LoopIn) {
 
-	swapCfg := &swapConfig{
-		lnd:   s.lndServices,
-		store: s.Store,
-	}
+	swapCfg := newSwapConfig(s.lndServices, s.Store, s.Server)
 
 	for _, pend := range loopOutSwaps {
 		if pend.State().State.Type() != loopdb.StateTypePending {
@@ -369,11 +366,7 @@ func (s *Client) LoopOut(globalCtx context.Context,
 
 	// Create a new swap object for this swap.
 	initiationHeight := s.executor.height()
-	swapCfg := &swapConfig{
-		lnd:    s.lndServices,
-		store:  s.Store,
-		server: s.Server,
-	}
+	swapCfg := newSwapConfig(s.lndServices, s.Store, s.Server)
 	swap, err := newLoopOutSwap(
 		globalCtx, swapCfg, initiationHeight, request,
 	)
@@ -486,13 +479,9 @@ func (s *Client) LoopIn(globalCtx context.Context,
 
 	// Create a new swap object for this swap.
 	initiationHeight := s.executor.height()
-	swapCfg := swapConfig{
-		lnd:    s.lndServices,
-		store:  s.Store,
-		server: s.Server,
-	}
+	swapCfg := newSwapConfig(s.lndServices, s.Store, s.Server)
 	swap, err := newLoopInSwap(
-		globalCtx, &swapCfg, initiationHeight, request,
+		globalCtx, swapCfg, initiationHeight, request,
 	)
 	if err != nil {
 		return nil, err

loopin_test.go

@@ -32,11 +32,7 @@ func TestLoopInSuccess(t *testing.T) {
 
 	height := int32(600)
 
-	cfg := &swapConfig{
-		lnd:    &ctx.lnd.LndServices,
-		store:  ctx.store,
-		server: ctx.server,
-	}
+	cfg := newSwapConfig(&ctx.lnd.LndServices, ctx.store, ctx.server)
 
 	swap, err := newLoopInSwap(
 		context.Background(), cfg,
@@ -151,11 +147,7 @@ func testLoopInTimeout(t *testing.T,
 
 	height := int32(600)
 
-	cfg := &swapConfig{
-		lnd:    &ctx.lnd.LndServices,
-		store:  ctx.store,
-		server: ctx.server,
-	}
+	cfg := newSwapConfig(&ctx.lnd.LndServices, ctx.store, ctx.server)
 
 	req := testLoopInRequest
 	if externalValue != 0 {
@@ -282,12 +274,7 @@ func testLoopInResume(t *testing.T, state loopdb.SwapState, expired bool) {
 	defer test.Guard(t)()
 
 	ctx := newLoopInTestContext(t)
-
-	cfg := &swapConfig{
-		lnd:    &ctx.lnd.LndServices,
-		store:  ctx.store,
-		server: ctx.server,
-	}
+	cfg := newSwapConfig(&ctx.lnd.LndServices, ctx.store, ctx.server)
 
 	senderKey := [33]byte{4}
 	receiverKey := [33]byte{5}

loopout_test.go

@@ -145,11 +145,7 @@ func TestLateHtlcPublish(t *testing.T) {
 
 	height := int32(600)
 
-	cfg := &swapConfig{
-		lnd:    &lnd.LndServices,
-		store:  store,
-		server: server,
-	}
+	cfg := newSwapConfig(&lnd.LndServices, store, server)
 
 	swap, err := newLoopOutSwap(
 		context.Background(), cfg, height, testRequest,
@@ -231,11 +227,10 @@ func TestCustomSweepConfTarget(t *testing.T) {
 	ctx.Lnd.SetFeeEstimate(testRequest.SweepConfTarget, 250)
 	ctx.Lnd.SetFeeEstimate(DefaultSweepConfTarget, 10000)
 
-	cfg := &swapConfig{
-		lnd:    &lnd.LndServices,
-		store:  newStoreMock(t),
-		server: newServerMock(),
-	}
+	cfg := newSwapConfig(
+		&lnd.LndServices, newStoreMock(t), newServerMock(),
+	)
+
 	swap, err := newLoopOutSwap(
 		context.Background(), cfg, ctx.Lnd.Height, testRequest,
 	)

swap.go

@@ -82,3 +82,13 @@ type swapConfig struct {
 	store  loopdb.SwapStore
 	server swapServerClient
 }
+
+func newSwapConfig(lnd *lndclient.LndServices, store loopdb.SwapStore,
+	server swapServerClient) *swapConfig {
+
+	return &swapConfig{
+		lnd:    lnd,
+		store:  store,
+		server: server,
+	}
+}