feat(new-tool): RSA key pair generator

src/utils/defaults.ts

@@ -1,4 +1,4 @@
-export { withDefaultOnError };
+export { withDefaultOnError, withDefaultOnErrorAsync };
 
 function withDefaultOnError<A, B>(cb: () => A, defaultValue: B): A | B {
   try {
@@ -7,3 +7,11 @@ function withDefaultOnError<A, B>(cb: () => A, defaultValue: B): A | B {
     return defaultValue;
   }
 }
+
+async function withDefaultOnErrorAsync<A, B>(cb: () => A, defaultValue: B): Promise<Awaited<A> | B> {
+  try {
+    return await cb();
+  } catch (_) {
+    return defaultValue;
+  }
+}