[AlphaCommerceHub] The maximum length of a payment description (`TxnDetails`) is 2000 characters

[dmitry_fedyuk (Dmitrii Fediuk)]

The TxnDetails parameter is documented on the «AlphaHPP» → «Request a Paypage Session» page.
This page says that the TxnDetails parameter accepts up to 2000 characters:

[dmitry_fedyuk (Dmitrii Fediuk)]

Today I have got a comment from the AlphaCommerceHub team:

This field is only accepting alphanumerics. The brackets are not supported.
We will look to extend this field for special characters but for now please remove the brackets and comma from your test string

[dmitry_fedyuk (Dmitrii Fediuk)]

See also:

• [AlphaCommerceHub] What does the «Alpha» type mean?
• [AlphaCommerceHub] What is the full set of characters treated as «alphanumeric» in the specification?
• Is it normal that AlphaCommerceHub treats a bracket in a payment description or in a product name as a critical error, and rejects the whole payment?