I have a function below:

buildHandler({
    accepts: {
        userName: { type: 'string', required: true },
        age: { type: 'number' }
    },
    handler: ({ args }) =>
    {
        // code
    }
})

Or:

buildHandler({
    accepts: [
        { arg: 'userName', type: 'string', required: true },
        { arg: 'age', type: 'number' },
    ],
    handler: ({ args }) =>
    {
        // code
    }
})

I want the type of the param “args” like

type Args = {
    userName: string,
    age?: number
}

I tried doing this:

type ReformatType<T> =
    T extends 'string' ? string :
    T extends 'number' ? number :
    T extends 'boolean' ? boolean : T

type Schema<T extends Record<string, { type: any, required?: boolean }>> =
    { [key in keyof T]: T[keyof T]['required'] extends true ? ReformatType<T[keyof T]['type']> : (ReformatType<T[keyof T]['type']> | undefined) }

But the results aren’t what I expected.

type Args = {
    userName: string | number | undefined;
    age: string | number | undefined;
}