Use assertReturn to cleanup (#2804)

* Use assertReturn to cleanup

* Remove Uint/Int duplication

* Adjust

* ws errors, part 2

* .

* Adj. manual

* adj

* switchMap

* Revert "switchMap"

This reverts commit edfa4a2258f09042b61a27fd3812f0c53039fe4f.

* Revert.

* Revert.

* protected constructor

* Correct isHexJson flag

* Remove isHexJson (always detect)

* Adjust

* Flags

packages/typegen/package.json

@@ -40,7 +40,7 @@
     "@polkadot/metadata": "^2.4.2-12",
     "@polkadot/rpc-provider": "^2.4.2-12",
     "@polkadot/types": "^2.4.2-12",
-    "@polkadot/util": "^3.6.2-8",
+    "@polkadot/util": "^3.6.2-10",
     "handlebars": "^4.7.6",
     "websocket": "^1.0.32",
     "yargs": "^16.1.0"

packages/typegen/src/generate/tsDef.ts

@@ -122,7 +122,7 @@ function tsSet (definitions: Record<string, ModuleTypes>, { name: setName, sub }
   setImports(definitions, imports, ['Set']);
 
   const types = (sub as TypeDef[]).map(({ name }): string => {
-    assert(!!name, 'Invalid TypeDef found, no name specified');
+    assert(name, 'Invalid TypeDef found, no name specified');
 
     return createGetter(definitions, `is${name}`, 'boolean', imports);
   });