Existing V3 web-checkout integrations continue to work against https://v4pay.pokeapay.com/checkout with the documented parameters and the legacy hash — byte-for-byte compatible:
// V3 legacy checkout hash (frozen — do not use for new builds)
$message = $live . $oref . $amt . $tel . $eml . $cc;
$hash = hash_hmac('sha1', $message, $secretKey);
| Param | Meaning |
|---|
live | "1" live / "0" demo (V3 semantics; V4 credentials derive this instead) |
oref | Your order reference |
amt | Amount as a decimal string (V3 semantics) |
tel | Customer phone |
eml | Customer email |
cc | Customer/merchant code |
hash | The HMAC-SHA1 above |
SHA-1 is deprecated. This surface is retained only so existing links keep working during the V3 deprecation window and will not be extended. New integrations must use the V4 hash or payment links. See the deprecation schedule.