Change RPC and Network type checking approach

Author: pselle

eslint.config.js

@@ -7,7 +7,7 @@ import reactX from "eslint-plugin-react-x";
 import tseslint from "typescript-eslint";
 
 export default tseslint.config(
-  { ignores: ["dist", "packages"] },
+  { ignores: ["dist", "packages", "src/contracts"] },
   {
     extends: [
       js.configs.recommended,

src/contracts/util.ts

@@ -1,5 +1,9 @@
+const envRPC = import.meta.env.PUBLIC_SOROBAN_RPC_URL;
 export const rpcUrl =
-  import.meta.env.PUBLIC_SOROBAN_RPC_URL as string ?? "http://localhost:8000/rpc";
+  envRPC && typeof envRPC === "string"
+    ? envRPC : "http://localhost:8000/rpc";
+
+const envNetworkPassphrase = import.meta.env.PUBLIC_NETWORK_PASSPHRASE;
 export const networkPassphrase =
-  import.meta.env.PUBLIC_SOROBAN_NETWORK_PASSPHRASE as string ??
-  "Standalone Network ; February 2017";
+  envNetworkPassphrase && envNetworkPassphrase === "string"
+    ? envRPC : "Standalone Network ; February 2017";