diff --git a/functionality/filesharing/filesharing_functionality.go b/functionality/filesharing/filesharing_functionality.go
index b3436f4..8d76ddf 100644
--- a/functionality/filesharing/filesharing_functionality.go
+++ b/functionality/filesharing/filesharing_functionality.go
@@ -36,8 +36,9 @@ func FunctionalityGate(experimentMap map[string]bool) (*Functionality, error) {
 	return nil, errors.New("filesharing is not enabled")
 }
 
+// PreviewFunctionalityGate returns filesharing if image previews are enabled
 func PreviewFunctionalityGate(experimentMap map[string]bool) (*Functionality, error) {
-	if experimentMap[constants.FileSharingExperiment] == true && experimentMap[constants.ImagePreviewsExperiment] == true {
+	if experimentMap[constants.FileSharingExperiment] && experimentMap[constants.ImagePreviewsExperiment] {
 		return new(Functionality), nil
 	}
 	return nil, errors.New("image previews are not enabled")
@@ -52,17 +53,18 @@ type OverlayMessage struct {
 	Size  uint64 `json:"s"`
 }
 
+// FileKey is the unique reference to a file offer
 func (om *OverlayMessage) FileKey() string {
 	return fmt.Sprintf("%s.%s", om.Hash, om.Nonce)
 }
 
-// checks file size and file name. *DOES NOT* check user settings or contact state
+// ShouldAutoDL checks file size and file name. *DOES NOT* check user settings or contact state
 func (om *OverlayMessage) ShouldAutoDL() bool {
 	if om.Size > constants.ImagePreviewMaxSizeInBytes {
 		return false
 	}
 	lname := strings.ToLower(om.Name)
-	for _, s := range constants.AUTODL_FILE_EXTS {
+	for _, s := range constants.AutoDLFileExts {
 		if strings.HasSuffix(lname, s) {
 			return true
 		}
@@ -133,6 +135,7 @@ func (f *Functionality) ShareFile(filepath string, profile peer.CwtchPeer, conve
 	return nil
 }
 
+// GenerateDownloadPath creates a file path that doesn't currently exist on the filesystem
 func GenerateDownloadPath(basePath, fileName string) (filePath, manifestPath string) {
 	// avoid all kina funky shit
 	re := regexp.MustCompile(`[^A-Za-z0-9._-]`)
diff --git a/model/constants/experiments.go b/model/constants/experiments.go
index 9adb50e..665a856 100644
--- a/model/constants/experiments.go
+++ b/model/constants/experiments.go
@@ -1,14 +1,14 @@
 package constants
 
-// Allows file sharing
+// FileSharingExperiment Allows file sharing
 const FileSharingExperiment = "filesharing"
 
-// Causes images (up to ImagePreviewMaxSizeInBytes, from accepted contacts) to auto-dl and preview
+// ImagePreviewsExperiment Causes images (up to ImagePreviewMaxSizeInBytes, from accepted contacts) to auto-dl and preview
 // requires FileSharingExperiment to be enabled
 const ImagePreviewsExperiment = "filesharing-images"
 
-// Files up to this size will be autodownloaded using ImagePreviewsExperiment
+// ImagePreviewMaxSizeInBytes Files up to this size will be autodownloaded using ImagePreviewsExperiment
 const ImagePreviewMaxSizeInBytes = 20971520
 
-// Files with these extensions will be autodownloaded using ImagePreviewsExperiment
-var AUTODL_FILE_EXTS = [...]string{".jpg", ".jpeg", ".png", ".gif", ".webp", ".bmp"}
+// AutoDLFileExts Files with these extensions will be autodownloaded using ImagePreviewsExperiment
+var AutoDLFileExts = [...]string{".jpg", ".jpeg", ".png", ".gif", ".webp", ".bmp"}