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Simple integration with hi.direkteinreichung
Instead of integrating directly with our API to create order payments as outlined in server integration we also offer a simpler albeit slightly more manual integration process for hi.direkteinreichung in case your shop system is not that trivial to extend.
When a user wants to make a payment via hi.direct you forward him to hi.linkzahlung. Depending on your checkout flow you can either directly forward the user from your shop or the user can receive an email with a link to hi.linkzahlung. For this step, any solution that works with your flow is fine as long as you can forward the user to hi.linkzahlung, either directly or with a link the user receives somehow.
hi.linkzahlung landing page
On this page the user then has to fill out the order total, merchant reference and upload their invoice. When the user has completed the form they are redirected to hi.direkteinreichung where they can finish the payment process.
hi.linkzahlung also supports prefilling the order total and the merchant reference via query parameters to make it easier for your users.
merchantReference can be a string of up to 40 characters
total can be any number with up to 2 decimal places with either "." or "," as the decimal separator
Without integration with our API and webhooks we cannot offer realtime transaction status updates. Instead, we send out emails with a payment confirmation after each transaction.