fulfillment process and posting tracking numbers to the shopify api

Webship
Shopify Partner
6 0 5
Dear Support

 

We are a fulfillment company and use in-house developed WMS software. Currently we are working on the integration of customers that use the Shopify platform. Most of the work is done:
  • we get new ready-to-be-fulfilled orders from Shopify through the webhook
  • we successfully add and update products through the API (adding new products, setting stock, price, etc)
So far so good, however we are now stuck with the fulfillment process and can't seem to figure out how it works. We noticed it is possible to create a fulfillment service through the API and to provide Shopify with webhooks to obtain stock figures and transport tracking numbers from us. This approach is not practical for us however, as we want to keep full control of stock values, rather than letting Shopify fetch this information every hour or so, which can never yield accurate up-to-date stock info.

 

My question then is this: how can we give tracking numbers back to Shopify for a given orderline, based on the order id for example, or based on the FulfillmentOrder id? Without providing this information to Shopify through webhooks?

 

Thank you in advance for pointing us in the right direction.

 

Best Regards,
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