Thanks for response,
I want to integrate the API related to order processing for which I have the done the following :-
1)Integrate the API for new order which is process.
/admin/orders.json?financial_status=pending&fulfillment_status=null
2)Integrate the API related to payment of that new order for that we use Transaction API
[POST /admin/orders/#{order_id}/transactions.json](https://help.shopify.com/api/reference/transaction#create)
3)For generating the invoice of particular order we use API of invoice from Draft order.
POST /admin/draft_orders/#{draft_order_id}/send_invoice.json[Here for generate the api for invoice, first we have to create a draft order for that? Because in API of send invoice the draft_oreder_id must be needed and it should me come when new draft order created ]
4)For fulfillment of particular order
/admin/orders/#{order_id}/fulfillments/#{fulfillment_id}/complete.json
Here, what is the difference between create a fulfillment and complete a fulfillment API.
5)When order has been fulfilled and paid then the last process is to archive the order for that API should be:-
POST /admin/orders/#{order_id}/close.json
**a)**For generate the shipping label and manifest I don’t found any type of API.
**b)**The API which I define above according to the Order Processing, correct me if I am wrong and give me suggestions with the correct API.
**c)**And also if I miss any of the process between the above mention process, please let me know the process.
**d)**And also clear my doubt as you define in your last reply that “The intent of Draft Orders is ultimately to send an invoice/order to a customer that turns into a real order after payment is made” that means for generate an invoice its not compulsory to create a draft order. only with the help of draft order we create invoice of that particular order.
Please give the suggestion for all a, b, c, d. Any suggestion regarding this is very helpful. 
Thank you
â– â– â– â– â– â– â– â–