Fiserv Payment Demo

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Transaction Origin
PHONE: Order received over phone, you enter payment details, Card Code required
ECI: Standard eCommerce, customer enters details, 3D Secure required
MAIL: Manual entry from written form, Card Code not allowed
Transaction Details
Order ID: 0349544f-eab7-4574-aa66-80704b054b03
Amount: £20.00
Currency: 826
Transaction Type: sale
Checkout Option: combinedpage
Store: 2220542147
Dynamic Merchant Name: Sample
Language: en_GB
Timezone: Europe/London
Timestamp: 2026:03:27-01:39:43
Email: john.doe@example.com
Hash Data String (What Gets Hashed)

String being hashed:

20.00|combinedpage|826|Sample|HMACSHA256|0349544f-eab7-4574-aa66-80704b054b03|https://fiservtest.leftoverbits.co.uk/PaymentResponse/Failed|https://fiservtest.leftoverbits.co.uk/PaymentResponse/Success|2220542147|Europe/London|https://fiservtest.leftoverbits.co.uk/PaymentResponse/Notify|PHONE|2026:03:27-01:39:43|sale

This string is hashed with your shared secret to create the hashExtended value.

Form Data Being Sent to Fiserv
Field Name Value
chargetotal 20.00
checkoutoption combinedpage
currency 826
dynamicMerchantName Sample
hash_algorithm HMACSHA256
oid 0349544f-eab7-4574-aa66-80704b054b03
responseFailURL https://fiservtest.leftoverbits.co.uk/PaymentResponse/Failed
responseSuccessURL https://fiservtest.leftoverbits.co.uk/PaymentResponse/Success
storename 2220542147
timezone Europe/London
transactionNotificationURL https://fiservtest.leftoverbits.co.uk/PaymentResponse/Notify
trxOrigin PHONE
txndatetime 2026:03:27-01:39:43
txntype sale
hashExtended l7qJN9ZmH3ll47ArRVIQJeEYo3BMFvIGXAu7Ht6ecyI=
Ready to Proceed

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