{$list->unserial($checkout.plugin_data, "plugin_data")}
{translate module=checkout} mode {/translate}
Merchant Account (the currency of the transaction is inferred from the account specified)
OptimalPayments Merchant ID (the account transaction processing ID associated with the merchant)
OptimalPayments Merchant Password (the account transaction processing password associated with the merchant ID specified)
{translate module=checkout} card_type {/translate}