server-validation.js

import {
  Forms,
  useSafeCallback
} from '@pricefx/unity-components';

const {
  useForm,
  Form,
  Field,
  error,
  success
} = Forms;

const MyForm = () => {
  const onSubmit = useCallback(({ validation }) => {
    console.log('validation results in on submit cb', validation);
  }, []);
  const { formId } = useForm({ onSubmit });
  const serverValidator = useCallback(async (value) => {
    try {
      await api.validatidate(..., value);
      return success();
    } catch (e) {
      return error(e);
    }
  }, []);
  
  return (
    <Form formId={formId}>
      <Field ... validator={serverValidator} />  
    </Form> 
  );
}