Request: Include detailed request definitions per channel

[jdiazmartin]

Hi Fiuu team,

Thanks for the comprehensive documentation for the Direct Server API. While integrating across multiple channels, I found it difficult to clearly determine which fields are required, optional, or conditional for each specific channel.

The current Payment Request Parameters section provides a global list of parameters with M/O/C (Mandatory/Optional/Conditional) tags, but the conditional logic per TxnChannel is not clearly outlined.

On the parameter TxnChannelExt there is a reference to a Channel API Spec. Where can I find this documentation?

Suggestion

It would be extremely helpful if the documentation included:
A channel-specific request field matrix, showing the required, optional, and conditional fields per TxnChannel.
If possible, sample requests per channel.

Paramater name	Channel A	Channel B
MerchantID	M	M
ReferenceNo	M	M
TxnCurrency	M (SGD)	M (PHP, MYR)
...	...	...

This addition would:

• Improve developer experience
• Minimize guesswork and errors in integration
• Clarify compliance requirements (e.g., PCI-DSS relevant fields)
• Decreases support load, as many common questions would be clarified directly in the documentation

Let me know if this can be considered for a future release of the API documentation. Happy to help test or contribute samples if useful.

Thanks!