Zod Sorcery from https://stackoverflow.com/questions/76123184/how-to-infer-type-from-a-schema-generated-by-a-generic-function-in-zod

sorcery.ts

type Leaf<T> = z.infer<ReturnType<typeof LeafSchema<z.ZodType<T>>>>
type NumberLeaf = Leaf<number>

const getLeafValue = <T>(leaf: Leaf<T>) => leaf.value;

const test = { 'value': 123 };
const val = getLeafValue(test);