transfers: accept incoming Transfers, create Transfer and post Transaction, perhaps create NSF, NOC/COR

[adamdecaf]

What were you trying to do?
PayGate will need to process incoming ACH files and create transfers for each. This means to debit/credit the account, save FileHeader information, and possibly create a NSF/return or NOC/COR if the file information is incorrect.

What did you expect to see?

PayGate should automatically handle incoming ACH files with admin endpoints for files which can't be automatically processed. These will be processed every day before the final cutoff.

Tasks

• Handle incoming files, create transfer and post to accounts
  • Create return/NOC when transaction can't post, fields are incorrect, or other errors occur.
• Admin endpoints for incoming files which can't be processed. They'll need flushed daily.

[adamdecaf]

Question: Should we have webhooks on these incoming transfers?

I was planning on updating Accounts (if enabled, for balance check and transaction post) on an incoming transfer. This is needed for NSF and related return creation.