Some updates

Author: mcjazzyfunky

package.json

@@ -1,6 +1,6 @@
 {
   "name": "js-messages",
-  "version": "0.1.19",
+  "version": "0.1.20",
   "license": "LGPL-3.0",
   "homepage": "https://github.com/js-works/js-messages",
   "main": "index.js",

src/main/api/types/MessagesOf.ts

@@ -0,0 +1,20 @@
+// --- MessagesOf ---------------------------------------------------
+
+type MessagesOf<T extends { [k: string]: MessageCreator<any, any> }> =
+  { [K in keyof T]:
+      T[K] extends (...args: any[]) => infer R
+        ? R
+        : never
+  }
+
+// --- locals -------------------------------------------------------
+
+type MessageCreator<P, M> = (...args: any[]) => {
+  type: string,
+  payload?: P,
+  meta?: M 
+}
+
+// --- exports ------------------------------------------------------
+
+export default MessagesOf

src/main/index.ts

@@ -1,7 +1,3 @@
-import defineMessage from './api/defineMessage'
-import defineMessages from './api/defineMessages'
-
-export {
-  defineMessage,
-  defineMessages
-}
+export { default as defineMessage } from './api/defineMessage'
+export { default as defineMessages } from './api/defineMessages'
+export { default as MessagesOf } from './api/types/MessagesOf'