diff --git a/kittens/transfer/ftc.go b/kittens/transfer/ftc.go
index 3708fb1f1..5c740f1af 100644
--- a/kittens/transfer/ftc.go
+++ b/kittens/transfer/ftc.go
@@ -214,45 +214,44 @@ func (self *FileTransmissionCommand) Serialize(prefix_with_osc_code ...bool) str
 		found = true
 	}
 	for _, field := range fields {
-		if name := field.Tag.Get("name"); name != "" {
+		if name := field.Tag.Get("name"); name != "" && field.IsExported() {
 			val := v.FieldByIndex(field.Index)
 			encoded_val := ""
 			switch val.Kind() {
 			case reflect.String:
-				sval := val.String()
-				if sval != "" {
+				if sval := val.String(); sval != "" {
 					enc := field.Tag.Get("encoding")
 					switch enc {
 					case "base64":
-						encoded_val = base64.StdEncoding.EncodeToString(utils.UnsafeStringToBytes(sval))
+						encoded_val = base64.RawStdEncoding.EncodeToString(utils.UnsafeStringToBytes(sval))
 					default:
 						encoded_val = escape_semicolons(wcswidth.StripEscapeCodes(sval))
 					}
 				}
 			case reflect.Slice:
-				switch val.Elem().Type().Kind() {
+				switch val.Type().Elem().Kind() {
 				case reflect.Uint8:
-					bval := val.Bytes()
-					if len(bval) > 0 {
-						encoded_val = base64.StdEncoding.EncodeToString(bval)
+					if bval := val.Bytes(); len(bval) > 0 {
+						encoded_val = base64.RawStdEncoding.EncodeToString(bval)
 					}
 				}
 			case reflect.Uint64:
-				encoded_val = strconv.FormatUint(val.Uint(), 10)
+				if uival := val.Uint(); uival != 0 {
+					encoded_val = strconv.FormatUint(uival, 10)
+				}
 			default:
 				if val.CanInterface() {
-					i := val.Interface()
-					if field, ok := i.(Field); ok {
+					switch field := val.Interface().(type) {
+					case Field:
 						if !field.IsDefault() {
 							encoded_val = field.Serialize()
 						}
-					} else if field, ok := i.(time.Duration); ok {
+					case time.Duration:
 						if field != 0 {
 							encoded_val = strconv.FormatInt(int64(field), 10)
 						}
-					} else if field, ok := i.(fs.FileMode); ok {
-						field = field.Perm()
-						if field != 0 {
+					case fs.FileMode:
+						if field = field.Perm(); field != 0 {
 							encoded_val = strconv.FormatInt(int64(field), 10)
 						}
 					}
diff --git a/kittens/transfer/ftc_test.go b/kittens/transfer/ftc_test.go
new file mode 100644
index 000000000..83a2d3c81
--- /dev/null
+++ b/kittens/transfer/ftc_test.go
@@ -0,0 +1,32 @@
+// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package transfer
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+var _ = fmt.Print
+
+func TestFTCSerialization(t *testing.T) {
+	ftc := FileTransmissionCommand{}
+	q := func(expected string) {
+		actual := ftc.Serialize()
+		if diff := cmp.Diff(expected, actual); diff != "" {
+			t.Fatalf("Failed to Serialize:\n%s", diff)
+		}
+	}
+	q("")
+	ftc.Action = Action_send
+	q("ac=send")
+	ftc.File_id = "fid"
+	ftc.Name = "moose"
+	ftc.Mtime = time.Second
+	ftc.Permissions = 0o600
+	ftc.Data = []byte("moose")
+	q("ac=send;fid=fid;n=bW9vc2U;mod=1000000000;prm=384;d=bW9vc2U")
+}
diff --git a/kittens/transfer/send.go b/kittens/transfer/send.go
index 217116506..c35d7a5f7 100644
--- a/kittens/transfer/send.go
+++ b/kittens/transfer/send.go
@@ -305,6 +305,10 @@ type SendManager struct {
 	progress_tracker                                           *ProgressTracker
 }
 
+func (self *SendManager) start_transfer() string {
+	panic("TODO: Implement this")
+}
+
 func (self *SendManager) initialize() {
 	if self.bypass != "" {
 		self.bypass = encode_bypass(self.request_id, self.bypass)
@@ -341,6 +345,11 @@ type SendHandler struct {
 	progress_update_timer                loop.IdType
 }
 
+func (self *SendHandler) refresh_progress(timer_id loop.IdType) (err error) {
+	self.progress_update_timer = 0
+	panic("TODO: Implement this")
+}
+
 func (self *SendHandler) schedule_progress_update(delay time.Duration) {
 	if self.progress_update_timer != 0 {
 		self.lp.RemoveTimer(self.progress_update_timer)
@@ -370,12 +379,16 @@ func (self *SendHandler) send_payload(payload string) {
 	self.lp.QueueWriteString(self.manager.suffix)
 }
 
+func (self *SendHandler) send_file_metadata() error {
+	panic("TODO: Implement this")
+}
+
 func (self *SendHandler) initialize() error {
 	self.manager.initialize()
 	self.send_payload(self.manager.start_transfer())
 	if self.opts.PermissionsBypass != "" {
 		// dont wait for permission, not needed with a bypass and avoids a roundtrip
-		self.send_file_metadata()
+		return self.send_file_metadata()
 	}
 	return nil
 }
diff --git a/kittens/transfer/send_test.go b/kittens/transfer/send_test.go
index 275603847..fd2ab95b3 100644
--- a/kittens/transfer/send_test.go
+++ b/kittens/transfer/send_test.go
@@ -93,10 +93,10 @@ func TestPathMappingSend(t *testing.T) {
 		f = first_file(filepath.Join(b, "s"), filepath.Join(b, "r"), "dest")
 		ae(f.symbolic_link_target, "fid:2")
 		f = first_file(filepath.Join(b, "h"), "dest")
-		ae(f.file_type, REGULAR_FILE)
+		ae(f.file_type, FileType_regular)
 		file_idx = 1
 		f = first_file(filepath.Join(b, "h"), filepath.Join(b, "r"), "dest")
 		ae(f.hard_link_target, "1")
-		ae(f.file_type, LINK_FILE)
+		ae(f.file_type, FileType_link)
 	})
 }