feat: added more mature secrets handling

src/core/node/arguments.ts

@@ -1,9 +0,0 @@
-export const DISCORD_TOKEN = process.env.DISCORD_TOKEN!;
-export const WARGAMING_APPLICATION_ID = process.env.WARGAMING_APPLICATION_ID!;
-
-if (!DISCORD_TOKEN) {
-  throw new Error('No Discord token provided');
-}
-if (!WARGAMING_APPLICATION_ID) {
-  throw new Error('No Wargaming application id provided}');
-}

src/core/node/secrets.ts

@@ -0,0 +1,15 @@
+const SECRET_KEYS = ['DISCORD_TOKEN', 'WARGAMING_APPLICATION_ID'] as const;
+
+type SECRET_KEY = typeof SECRET_KEYS extends readonly (infer T)[] ? T : never;
+
+export const secrets = SECRET_KEYS.reduce<Partial<Record<SECRET_KEY, string>>>(
+  (accumulator, key) => ({
+    ...accumulator,
+
+    get [key](): string {
+      if (!(key in process.env)) throw new Error(`Key ${key} not provided`);
+      return process.env[key]!;
+    },
+  }),
+  {},
+) as Record<SECRET_KEY, string>;