RPC Mode type inference breaks with @hono/zod-openapi when given an `.optional()` field on the schema about middleware

[yusukebe]

@pallydotgg

Thanks. I'll check them later.

[pallydotgg]

It seems related to this: https://github.com/honojs/hono/blob/bd00d284693e2079bb3be7ee762bcde53b194c73/src/client/types.ts#L29C1-L33C10

Short example:

type A = BlankRecordToNever<{ id: string; optional?: string }>;

A gets typed as never

[pallydotgg]

Submitted an issue here as it seems to stem from core library: honojs/hono#1766

[pallydotgg]

Fixed with honojs/hono#1769

Thanks @yusukebe!

[yusukebe]

You are welcome!