next (#5)

Co-authored-by: sneak <sneak@sneak.berlin>
Reviewed-on: #5

mfer/mf.proto

@@ -1,26 +1,34 @@
 syntax = "proto3";
 
-option go_package = "git.eeqj.de/sneak/mfer";
+option go_package = "git.eeqj.de/sneak/mfer/mfer";
 
 message Timestamp {
   int64 seconds = 1;
   int32 nanos = 2;
 }
 
-message MFFile {
+message MFFileOuter {
     enum Version {
-        NONE = 0;
-        ONE = 1; // only one for now
+        VERSION_NONE = 0;
+        VERSION_ONE = 1; // only one for now
     }
 
     // required mffile root attributes 1xx
     Version version = 101;
-    bytes innerMessage = 102;
+
+    enum CompressionType {
+        COMPRESSION_NONE = 0;
+        COMPRESSION_GZIP = 1;
+    }
+
+    CompressionType compressionType = 102;
+
     // these are used solely to detect corruption/truncation
     // and not for cryptographic integrity.
     int64 size = 103;
     bytes sha256 = 104;
 
+    bytes innerMessage = 199;
     // 2xx for optional manifest root attributes
     // think we might use gosignify instead of gpg:
     // github.com/frankbraun/gosignify
@@ -54,10 +62,10 @@ message MFFileChecksum {
     bytes multiHash = 1;
 }
 
-message MFFileInner {
+message MFFile {
     enum Version {
-        NONE = 0;
-        ONE = 1; // only one for now
+        VERSION_NONE = 0;
+        VERSION_ONE = 1; // only one for now
     }
     Version version = 100;