How to make a business process document approval?

Question

1C-Bitrix

Good afternoon!

Please tell me how to implement:
There is a business process for coordinating documents. The initiator of the process loads at the start of the PDF starts on the leader.

If the manager agreed, then you need to put the manager’s signature on the document (uploaded) (previously uploaded, this is a picture that is uploaded to the system)

I know that there is FPDF / FPDI, but I don’t understand how to tie it with the BP, I work with them not so long ago.

Answer 1

BP has a block of PHP code in which you can implement any logic within BP