moving stuff around, stubbing interfaces

internal/cache/cache.go

@@ -17,3 +17,9 @@
 */
 
 package cache
+
+// Cache defines an in-memory cache that is safe to be wiped when the application is restarted
+type Cache interface {
+   Store(k string, v interface{}) error
+   Fetch(k string) (interface{}, error)
+}