fix: Add error message when wrong key entered from terminal ct download <downloadKey>

Author: pxor

src/ct/launch/launch.nim

@@ -108,7 +108,7 @@ proc runInitial*(conf: CodetracerConf) =
         conf.uploadTraceFolder,
         replayInteractive)
     of StartupCommand.download:
-      downloadCommand(conf.traceRegistryId)
+      downloadTraceCommand(conf.traceRegistryId)
     of StartupCommand.cmdDelete:
       deleteTraceCommand(conf.traceId, conf.controlId)
       # eventually enable?

src/ct/online_sharing/trace_manager.nim

@@ -46,10 +46,11 @@ proc unzipFile(zipFile: string, outputDir: string): (string, int) =
   zip.close()
   return (outPath, traceId)
 
-proc downloadCommand*(traceRegistryId: string) =
+proc downloadTraceCommand*(traceRegistryId: string) =
   # We expect a traceRegistryId to have <downloadId>::<passwordKey>
   let stringSplit = traceRegistryId.split("//")
   if stringSplit.len() != 3:
+    echo "error: Wrong download key! Should be <program_name>//<download_id>//<encryption_password>"
     quit(1)
   else:
     let downloadId = stringSplit[1]