(Visual FoxPro) Paynow.pl -- Make a Payment Request

Make a payment request POST with prepared message on Paynow payment request endpoint.

For more information, see https://docs.paynow.pl/#section/Payments/Make-a-payment

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loHttp
LOCAL lnSuccess
LOCAL loJson
LOCAL lcMyApiAccessKey
LOCAL lcMySigCalcKey
LOCAL loCrypt
LOCAL lcMessageBody
LOCAL lcSignature
LOCAL loResp
LOCAL loJsonResp
LOCAL lcRedirectUrl
LOCAL lcPaymentId
LOCAL lcStatus

* This example assumes the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')

* Implements the following CURL command:

* curl --request POST 'https://api.sandbox.paynow.pl/v1/payments' \
* -H 'Content-Type: application/json' \
* -H 'Api-Key: c12c386b-650b-43db-9430-d84fc05d9433' \
* -H 'Signature: aYPCytCoc+/wFgqHZJjgBCi20omXTn0yzm9LysJgnFo=' \
* -H 'Idempotency-Key: 59c6dd26-f905-487b-96c9-fd1d2bd76885' \
* --data-raw '{
*     "amount": 45671,
*     "externalId": "234567898654",
*     "description": "Test transaction",
*     "buyer": {
*         "email": "jan.kowalski@melements.pl"
*     }
* }'

* Use the following online tool to generate HTTP code from a CURL command
* Convert a cURL Command to HTTP Source Code

* Use this online tool to generate code from sample JSON:
* Generate Code to Create JSON

* The following JSON is sent in the request body.

* {
*   "amount": 45671,
*   "externalId": "234567898654",
*   "description": "Test transaction",
*   "buyer": {
*     "email": "jan.kowalski@melements.pl"
*   }
* }

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
loJson.UpdateInt("amount",45671)
loJson.UpdateString("externalId","234567898654")
loJson.UpdateString("description","Test transaction")
loJson.UpdateString("buyer.email","jan.kowalski@melements.pl")

lcMyApiAccessKey = "c12c386b-650b-43db-9430-d84fc05d9433"
lcMySigCalcKey = "b758f20d-ba92-44fa-acca-f57e99787b9d"

* Calculate the Signature header.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Crypt2')
loCrypt = CreateObject('Chilkat.Crypt2')
loCrypt.MacAlgorithm = "hmac"
loCrypt.EncodingMode = "base64"
loCrypt.SetMacKeyString(lcMySigCalcKey)
loCrypt.HashAlgorithm = "SHA-256"
lcMessageBody = loJson.Emit()
lcSignature = loCrypt.MacStringENC(lcMessageBody)

loHttp.SetRequestHeader("Idempotency-Key",loCrypt.GenerateUuid())
loHttp.SetRequestHeader("Api-Key",lcMyApiAccessKey)
loHttp.SetRequestHeader("Signature",lcSignature)
loHttp.SetRequestHeader("Content-Type","application/json")
loHttp.Accept = "application/json"

loResp = loHttp.PostJson3("https://api.sandbox.paynow.pl/v1/payments","application/json",loJson)
IF (loHttp.LastMethodSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loJson
    RELEASE loCrypt
    CANCEL
ENDIF

? "Response body:"
? loResp.BodyStr

* Sample response:
* {
*   "redirectUrl": "https://paywall.sandbox.paynow.pl/NOA0-YJ9-Y1P-29V?token=eyJraWQiOiJhMD ... L60wk",
*   "paymentId": "NOA0-YJ9-Y1P-29V",
*   "status": "NEW"
* }

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJsonResp = CreateObject('Chilkat.JsonObject')
loJsonResp.Load(loResp.BodyStr)
lcRedirectUrl = loJson.StringOf("redirectUrl")
lcPaymentId = loJson.StringOf("paymentId")
lcStatus = loJson.StringOf("status")

RELEASE loHttp
RELEASE loJson
RELEASE loCrypt
RELEASE loJsonResp