Function emptyStringAsDefault

apps/api/src/config.ts:15–16

(schema: T)

  z.preprocess(value => (value === "" ? undefined : value), schema.optional());

const emptyStringAsDefault = <T extends z.ZodTypeAny>(schema: T) =>
  z.preprocess(value => (value === "" ? undefined : value), schema);

// Ethereum address schema: validates 0x followed by 40 hex characters
const ethereumAddress = z