# Configuration variables

Your application will need to keep a configuration of variables to use for each distinct Toggle account (e.g. for each of our mutual shared customers/clients).

These are summarised below.

| Variable                         | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| -------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `sales_channel_id`               | For POS integrations, use `3` as the sales\_channel\_id when creating orders – this is a permanent ID used across all accounts for in-store transactions.                                                                                                                                                                                                                                                                                                                          |
| `fulfilment_method_id`           | <p>If you issue digital cards from your application, and would like Toggle to send the guest the gift card - this would be <code>1</code> (Email)</p><p></p><p>If you issue digital cards from your application, and would like Toggle to send the guest the gift card - this would be <code>2</code> (Postal)</p><p></p><p>If you want to issue the card from your application, this would be <code>8</code> (3rd Party)</p>                                                      |
| `currency`                       | Default to `GBP` (£ sterling), but leave this as something that can be configured as well, this will ensure the integration is future-proofed to handle other currency IDs in future.                                                                                                                                                                                                                                                                                              |
| `account_id`                     | `account_id` will be manually configured, and will be provided during onboarding of a new mutual customer. Email <support@usetoggle.com> to request an `account_id`.                                                                                                                                                                                                                                                                                                               |
| `merchant_id`                    | This identifies you as an an approved merchant on our platform. Email <support@usetoggle.com> to request this.                                                                                                                                                                                                                                                                                                                                                                     |
| `unit_epos_reference`            | This refers to the unique site location, passed to Toggle so its knows the location where the transaction was made. This needs to be matched with the configured EPOS references in each Toggle customer's account. If your transactions don't relate to a particular site, you will need a "head office" location reference on the Toggle account to use. [See here for more information](http://academy.usetoggle.com/en/articles/2892479-setting-up-toggle-for-multiple-sites). |
| `merchant_transaction_reference` | This refers to the unique reference created by the your platform when the transaction is made. You will generate and pass this to our API when handling transactions.                                                                                                                                                                                                                                                                                                              |