To switch CactuShop to use WorldPay, you must edit the 

paymentsystem

config setting (see 7.4.14.4) to include `worldpay' (lower case). 

8.1.2 

Config settings   WorldPay 

8.1.2.1 WP_AuthCode 

This can be set to `A' for a full authorization (card is authorized and billed 

immediately) or `E' for a pre authorization (the card is authorized but payment 

is not taken until you choose to bill the card from WorldPay's back end). Pre 

authorization is used when you will need to manually check whether stock is 

available or the order passes extra fraud detection measures you may have in 

place, for example. To use pre authorization, you will need to contact 

WorldPay and request that this facility is set up at their end. 

8.1.2.2 WP_CallbackPassword 

This is an added security measure. Set a password or phrase here and then 

set up the corresponding phrase in the WorldPay merchant management 

system. WorldPay passes this back to CactuShop after the transaction has 

completed. 

8.1.2.3 WP_EmailCustomer 

Whether you want CactuShop to email the customer when an order goes 

through. Alternatively you can get WorldPay to send the emails (see 

WorldPay s Merchant Management System).

8.1.2.4 WP_EmailMerchant 

Whether you want CactuShop to email you when an order goes through. 

Alternatively you can get WorldPay to send the emails (see WorldPay s 

Merchant Management System).

8.1.2.5 WP_InstallID 

The Install ID given to you by WorldPay 

8.1.2.6 WP_ProcessCurrency 

If you wish all orders to be processed in one currency as opposed to the 

currency that the customer was viewing the site in, enter the ISO code for the 

currency here, e.g. GBP. If you leave this blank, the orders will be processed 

in the currency that the user selected to view the site in. Note that not all 

currencies you set up on CactuShop may be supported by this gateway. 

8.1.2.7 WP_ReturnURL 

This is where you want the user to return after the transaction has completed 

(most likely your homepage). The purchaser will be given a hyperlink to 

return to this location. Do not confuse this with the callback set up at 

WorldPay's site (which will be the full URL to 

WORLDPAY_callback.asp

.

8.1.2.8 WP_testmode 

If this is set to 100 whilst you are testing, then all transactions will succeed. If 

set to 101 all transactions will fail. See WorldPay's documentation for more 

information.

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