Sandbox environment for RMS hosted checkout api?

[20051231]

We are trying to integrate hosted checkout but the sandbox environment returns 404.

https://sandbox.merchant.razer.com/RMS/pay/

Production environment works but our account is not setuped for payment (with max transaction amount 0.01 MYR)

[Kheechieng]

Please pass the valid sandbox merchant ID which prefixed with SB_xxx, if you do not have a sandbox merchant ID kindly request from [email protected]

[20051231]

we can successfully integrate the hosted checkout now. but the channel parameter is not working as expected, if we pass something to it, it always return Sorry, you're not allowed to proceed due to Merchant account issue!. Without passing channel, it can correctly show the payment page with channel selector.

Also what is the hashing order the currency and channel if we enabled Use extended format for Verify Payment

Thank you