(VB.NET UWP/WinRT) PayPal - Create Direct Credit Card Payment

Creates a direct credit card payment where your application passes the credit card, shipping, and payment information to PayPal.

Note: For sandbox calls, you can use the credit card numbers provided in your sandbox test accounts.

Note: This is an example where you handle the card data directly, and therefore you would need to ensure you are PCI compliant. There are other ways to create a payment where your application does NOT handle the credit card data directly.

Note: This example requires Chilkat v9.5.0.64 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

' Note: Requires Chilkat v9.5.0.64 or greater.

' This requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' Load our previously obtained access token. (see PayPal OAuth2 Access Token)
Dim jsonToken As New Chilkat.JsonObject
jsonToken.LoadFile("qa_data/tokens/paypal.json")

' Build the Authorization request header field value.
Dim sbAuth As New Chilkat.StringBuilder
' token_type should be "Bearer"
sbAuth.Append(jsonToken.StringOf("token_type"))
sbAuth.Append(" ")
sbAuth.Append(jsonToken.StringOf("access_token"))

' Make the initial connection.
' A single REST object, once connected, can be used for many PayPal REST API calls.
' The auto-reconnect indicates that if the already-established HTTPS connection is closed,
' then it will be automatically re-established as needed.
Dim rest As New Chilkat.Rest
Dim bAutoReconnect As Boolean = True
Dim success As Boolean = Await rest.ConnectAsync("api.sandbox.paypal.com",443,True,bAutoReconnect)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' ----------------------------------------------------------------------------------------------
' The code above this comment could be placed inside a function/subroutine within the application
' because the connection does not need to be made for every request.  Once the connection is made
' the app may send many requests..
' ----------------------------------------------------------------------------------------------

' Build the JSON containing the credit card data and transaction information.
Dim json As New Chilkat.JsonObject
json.EmitCompact = False
json.UpdateString("intent","sale")
json.UpdateString("payer.payment_method","credit_card")
json.UpdateString("payer.funding_instruments[0].credit_card.number","4032031087659974")
json.UpdateString("payer.funding_instruments[0].credit_card.type","visa")
' Do NOT include a leading zero.  For example, do not use "09" for the month.
json.UpdateNumber("payer.funding_instruments[0].credit_card.expire_month","9")
json.UpdateNumber("payer.funding_instruments[0].credit_card.expire_year","2021")
json.UpdateNumber("payer.funding_instruments[0].credit_card.cvv2","111")
json.UpdateString("payer.funding_instruments[0].credit_card.first_name","Joe")
json.UpdateString("payer.funding_instruments[0].credit_card.last_name","Buyer")
json.UpdateString("transactions[0].amount.total","7.47")
json.UpdateString("transactions[0].amount.currency","USD")
json.UpdateString("transactions[0].description","This is the payment transaction description.")

Debug.WriteLine(json.Emit())

' The JSON created by the above code is this:

' 	{ 
' 	  "intent": "sale",
' 	  "payer": { 
' 	    "payment_method": "credit_card",
' 	    "funding_instruments": [
' 	      { 
' 	        "credit_card": { 
' 	          "number": "4032031087659974",
' 	          "type": "visa",
' 	          "expire_month": 9,
' 	          "expire_year": 2021,
' 	          "cvv2": 111,
' 	          "first_name": "Joe",
' 	          "last_name": "Buyer"
' 	        }
' 	      }
' 	    ]
' 	  },
' 	  "transactions": [
' 	    { 
' 	      "amount": { 
' 	        "total": "7.47",
' 	        "currency": "USD"
' 	      },
' 	      "description": "This is the payment transaction description."
' 	    }
' 	  ]
' 	}

rest.AddHeader("Authorization",sbAuth.GetAsString())
rest.AddHeader("Content-Type","application/json")

' Send the POST request containign the JSON in the request body, and get the JSON response.
Dim sbJsonRequest As New Chilkat.StringBuilder
json.EmitCompact = True
json.EmitSb(sbJsonRequest)
Dim sbJsonResponse As New Chilkat.StringBuilder
success = Await rest.FullRequestSbAsync("POST","/v1/payments/payment",sbJsonRequest,sbJsonResponse)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


json.EmitCompact = False
json.LoadSb(sbJsonResponse)

Debug.WriteLine("Response Status Code = " & rest.ResponseStatusCode)

' Did we get a 201 success response?
If (rest.ResponseStatusCode <> 201) Then
    Debug.WriteLine(json.Emit())
    Debug.WriteLine("Failed.")
    Exit Sub
End If


' Sample response JSON is shown below.
Debug.WriteLine(json.Emit())

' Demonstrate how to access a few parts of the JSON response..
Debug.WriteLine("cc number: " & json.StringOf("payer.funding_instruments[0].credit_card.number"))
Debug.WriteLine("subtotal: " & json.StringOf("transactions[0].amount.details.subtotal"))
Debug.WriteLine("refund href: " & json.StringOf("transactions[0].related_resources[0].sale.links[1].href"))

' 	{ 
' 	  "id": "PAY-66A12106PU3254228LA3BYKI",
' 	  "create_time": "2016-11-23T22:46:01Z",
' 	  "update_time": "2016-11-23T22:46:07Z",
' 	  "state": "approved",
' 	  "intent": "sale",
' 	  "payer": { 
' 	    "payment_method": "credit_card",
' 	    "funding_instruments": [
' 	      { 
' 	        "credit_card": { 
' 	          "type": "visa",
' 	          "number": "xxxxxxxxxxxx9974",
' 	          "expire_month": "9",
' 	          "expire_year": "2021",
' 	          "first_name": "Joe",
' 	          "last_name": "Buyer"
' 	        }
' 	      }
' 	    ]
' 	  },
' 	  "transactions": [
' 	    { 
' 	      "amount": { 
' 	        "total": "7.47",
' 	        "currency": "USD",
' 	        "details": { 
' 	          "subtotal": "7.47"
' 	        }
' 	      },
' 	      "description": "This is the payment transaction description.",
' 	      "related_resources": [
' 	        { 
' 	          "sale": { 
' 	            "id": "70L88278E6781074B",
' 	            "create_time": "2016-11-23T22:46:01Z",
' 	            "update_time": "2016-11-23T22:46:07Z",
' 	            "amount": { 
' 	              "total": "7.47",
' 	              "currency": "USD"
' 	            },
' 	            "state": "completed",
' 	            "parent_payment": "PAY-66A12106PU3254228LA3BYKI",
' 	            "links": [
' 	              { 
' 	                "href": "https://api.sandbox.paypal.com/v1/payments/sale/70L88278E6781074B",
' 	                "rel": "self",
' 	                "method": "GET"
' 	              },
' 	              { 
' 	                "href": "https://api.sandbox.paypal.com/v1/payments/sale/70L88278E6781074B/refund",
' 	                "rel": "refund",
' 	                "method": "POST"
' 	              },
' 	              { 
' 	                "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-66A12106PU3254228LA3BYKI",
' 	                "rel": "parent_payment",
' 	                "method": "GET"
' 	              }
' 	            ],
' 	            "fmf_details": {},
' 	            "processor_response": { 
' 	              "avs_code": "X",
' 	              "cvv_code": "M"
' 	            }
' 	          }
' 	        }
' 	      ]
' 	    }
' 
' 	  ],
' 	  "links": [
' 	    { 
' 	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-66A12106PU3254228LA3BYKI",
' 	      "rel": "self",
' 	      "method": "GET"
' 	    }
' 	  ]
' 	}
'