Creating actual invoices via Sage 200 REST API

[Aaron Trevena]

I'm trying to find an explanation or documentation of how to create invoices in sage 200 using the REST API - the invoices endpoint doesn't seem to create anything that can be used as an invoice, and https://www.sagecity.com/gb/sage-200/f/general-discussion/143666/api-endpoint-for-draft-invoices---with-line-items suggests creating a sales_order and using an undocumented process to go from there to an actual invoice.

So how, exactly, can a useful invoice, that our finance team can send to customers, be created through the REST api?  

[Aaron Trevena]

answering my own question based on feedback from the sagesoft developer team - there is no support currently or planned for being able to create invoices in sage 200 through the rest API, the only option is to create sales orders and manually create invoices from those following the process in Print invoices from sales orders (sage.co.uk)