Most of this is straightforward. However, I have a couple questions:
1) When the 3PL service accepts a fulfillment request (with the Fulfillment Request - Accept endpoint), what changes will I see in the Shopify Admin screen on any accepted orders?
2) The FulfillmentService - Fetch_Tracking_Numbers endpoint purports to request (from the 3PL service) tracking numbers for completed fulfillments every hour. Now, in the endpoints listed above (their design) I don't see anything that will provide Shopify with an indication that they have completed the fulfillment of a specific order/orders. Am I correct? If so, would you suggest that they add the Fulfillment - Complete endpoint to the workflow?