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Address normalizers

Address normalizers

Address management in the Storefront requires bidirectional normalization.

Retrieving Addresses

To map Commercetools Address into Unified Model, following normalizers are used:

  • normalizeAddress: This function is used to retrieve an address that has been saved in the checkout process.
  • normalizeCustomerAddress: When a customer retrieves one of the addresses they've saved, this function comes into play.

Saving Address

When a customer sets a shipping address during the checkout process, the SetCartAddress method is utilized. Here, a critical aspect arises in scenarios involving Commercetools. To ensure the correct handling of new addresses in Commercetools, a special unnormalization process is required.

  • unnormalizeAddress To accurately save a new address in Commercetools, we need to unnormalize the address data. This means mapping the unified SfCreateAddressBody format used within the Storefront into the specific structure required by Commercetools, known as Address. This unnormalization step ensures that the address is correctly processed and stored in Commercetools, maintaining data integrity between the Storefront and Commercetools.



NameTypeDefault valueDescription
contextNormalizerContextcontext needed for the normalizer
addressAddressCommercetools Address


NameTypeDefault valueDescription
contextNormalizerContextcontext needed for the normalizer
addressAddressCommercetools Address. If address does not contain the id, an error is thrown


NameTypeDefault valueDescription
contextNormalizerContextcontext needed for the normalizer
addressSfCreateAddressBodyUnified address body sent in the request from the Storefront


The SfCustomerAddress model represents a reusable address, which customer decided to store. It is used within customer address methods, as for example GetCustomerAddresses. If any of this models don't contain the information you need for your Storefront, you can extend its logic using the addCustomFields API. In the following example we extend the normalizeCustomerAddress with externalId field which is available on Commercetools Address.

export const unifiedApiExtension = createUnifiedExtension({
  normalizers: {
    addCustomFields: [
        normalizeCustomerAddress: (context, address) => ({
          externalId: address.externalId,
  config: {

Similarly if you want to change the mapping of normalizeCustomerAddress or unnormalizeAddress function you can customize it within addCustomFields.


import { maybe } from "@shared/utils";
import { defineNormalizer } from "../defineNormalizer";

export const normalizeAddress = defineNormalizer.normalizeAddress((context, address) => {
  return {
    address1: maybe(address?.streetName),
    address2: maybe(address?.streetNumber),
    city: maybe(address?.city),
    country: maybe(address?.country),
    firstName: maybe(address?.firstName),
    lastName: maybe(address?.lastName),
    phoneNumber: maybe(address?.phone),
    postalCode: maybe(address?.postalCode),
    state: maybe(address?.state) || maybe(address?.region),
    titleCode: maybe(address?.title),

export const normalizeCustomerAddress = defineNormalizer.normalizeCustomerAddress(
  (context, address) => {
    if (! {
      throw new Error("Address is not a valid customer address. `id` field is missing");

    return {

export const unnormalizeAddress = defineNormalizer.unnormalizeAddress((context, address) => {
  return {
    firstName: address.firstName,
    lastName: address.lastName,
    postalCode: address.postalCode,
    streetName: address.address1,
    streetNumber: address.address2,
    phone: address.phoneNumber,
    state: address.state,
    title: address.titleCode,