Recursive schema

[macmillen]

How can I convert this type to a json-joy schema?

type Block = {
  id: string;
  children?: Block[];
} 

I have two problems:

1. how to define a recursive schema
2. how to define optional fields

When I try to do it by just using types without the schema builder:

type Block = n.obj<{
  id: n.con<string>;
  children: n.arr<Block[]>;
}>;

I get an error:

Type of property 'children' circularly references itself in mapped type '{ __id: string; children: any; }'

I checked how zod (a TypeScript schema library) is doing it and they do it asynchronously.
https://github.com/colinhacks/zod#recursive-types

[streamich]

Link to zod recursive types: https://github.com/colinhacks/zod/tree/v3?tab=readme-ov-file#recursive-types