About OFX connection

[Yue Yuanyuan]

hi,
  Right now I have one project need the OFX connection to the Bank. I am new
to this area. Checked the documentation, but still not sure where to start.
I want to set up one server which could download data from bank using OFX
and transfer money to pay a bill.
  Is there any documentation about how to implement this function? And in
GNUCash, which part of code finishes this function?
  Thank you so much.
Best,
Gavin Yue