Workflow

Caddy handles e-payment in the two steps:

• Evaluation
• Transaction

In detail:

• data for e-payment are evaluated by JavaScript [1]

  • data will send to Paymill
  • if data are proper, Paymill sends back a token
  • if data aren’t proper, Paymill tries to send a qualified error prompt or Caddy tries to generate a qualified error prompt.

• if data for e-payment are proper, the customer can send the order to your server

  • the order doesn’t contain any e-payment account data but the Paymill token [2]

  • your server sends the token and some other data like the amount and the invoice number to the server of Paymill for transaction

  • if the transaction is successful, caddy

    • sends the confirmation e-mail to the shop owner and a copy to the customer
    • stores some order data in the database

  • if the transaction fails, caddy

    • outputs a HTML error page with a qualified prompt
    • the customer can go back to the order

• if data for e-payment aren’t proper, the customer can’t send the order to your server

[1]	Caddy is using the PAYMILL Javascript Bridge. The clients’ sensitive data is sent directly to PAYMILL and is never touches your servers.

[2]

dito