Batch file for payments.
payment_{institution_id}_yyyymmdd_hhmmss.json
BatchPayments
required
Transaction amountrequired
The contract number to post transactions to.required
Pattern: [A-Z]{3}
Example: EUR
A valid ISO 4217 currency coderequired
First and last name of payer.required
Date of the transaction in ISO-8601 date format (YYYY-MM-DD).