Combine the content of multiple contracts

In this tutorial, you'll learn how to do the following tasks:

• Retrieve a draft of the most up-to-date contract information for a subscription billing cycle
• Combine multiple contracts to the same subscription draft
• Commit the combined contract information
• Fetch the combined contract information on a subscription billing cycle
• Create an order for a subscription billing cycle

• Your app can make authenticated requests to the GraphQL Admin API.
• Your app has the read_own_subscription_contracts and write_own_subscription_contracts access scopes. Learn how to configure your access scopes using Shopify CLI.

• You've created products and product variants in your development store.

• You've created at least two active subscription contracts for the same customer with recurring billing and delivery policies.

• You've familiarized yourself with managing billing cycle contracts.

The following diagram shows a preview of how combining contracts works:

In this example, the buyer has two contracts, one weekly and one bi-weekly for coffee and tea. Both contracts have billing cycles and share similar billing cycles 01/01, 01/15, and 01/29. Merchants might want to combine these subscription orders to consolidate fulfillment and shipping costs into one order.

You can use the subscriptionBillingCycleContractEdit mutation to create a subscription draft with the most up-to-date contract information on a specified billing cycle. Choose any one of the subscription contracts to be combined, and pass the contract ID and either the index or a date belonging to the billing cycle to specify the billing cycle.

Make note of the subscription contract draft ID. You'll use it to join additional contracts in the next step.

After retrieving the draft ID, you can combine other contracts to the draft by passing their billing cycles and the draft ID to the subscriptionBillingCycleContractDraftConcatenate mutation:

After combining the contracts together, you can update the subscription draft if needed. For example, you might want to add a discount to reward the customer for having multiple subscriptions.

For more information about updating the subscription draft, refer to Manage billing cycle contracts.

When you commit the subscription draft, the changes that you've made become active on the billing cycles for which the draft was created and for which the contracts were combined. You can call the subscriptionDraft query to review the information on the subscription draft before committing it.

After you're satisfied with your updates, you can call the subscriptionBillingCycleContractDraftCommit mutation to commit the changes for all the respective billing cycles for each contract:

After committing the subscription draft, you might want to fetch the information on your edited contract. You can do so using subscriptionBillingCycle query.

When the billing date comes, you can use subscriptionBillingAttemptCreate mutation on any of the combined contracts to create an order.

If no billingCycleSelector was specified, Shopify will create an order based on the current billing cycle's contract information by default.

If you want to create an order for a certain billing cycle, you must specify billingCycleSelector.

• Learn how to manage orders and fulfillments for prepaid subscriptions.