(VB.NET) Amazon Pay - Cancel Charge

See more Amazon Pay Examples

Moves Charge to Canceled state and releases any authorized payments.

For more information, see https://developer.amazon.com/docs/amazon-pay-api-v2/charge.html#cancel-charge

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Dim http As New Chilkat.Http
Dim success As Boolean

' Implements the following CURL command:

' curl "https://pay-api.amazon.com/:version/charges/:chargeId/cancel" \
' -X DELETE
' -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
' -H "x-amz-pay-date:20201012T235046Z"
' -d '{
'     "cancellationReason": "REASON DESCRIPTION"
' }'

' 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.

' {
'   "cancellationReason": "REASON DESCRIPTION"
' }

Dim json As New Chilkat.JsonObject
json.UpdateString("cancellationReason","REASON DESCRIPTION")

Dim sbRequestBody As New Chilkat.StringBuilder
json.EmitSb(sbRequestBody)

' Load your Amazon Pay private key.  
' There are many other ways to load private keys into the Chilkat private key object, such as from different formats,
' or from in-memory strings or bytes.
Dim privKey As New Chilkat.PrivateKey
success = privKey.LoadPemFile("C:/someDir/myAmazonPayPrivateKey.pem")
If (success = False) Then
    Debug.WriteLine(privKey.LastErrorText)
    Exit Sub
End If


' Provide your Amazon Pay private key and Public Key ID 
' Use your public key ID here.  It must be the one associated with the private key.
' Note: The SetAuthPrivateKey method was added in Chilkat v9.5.0.89
Dim publicKeyId As String = "SANDBOX-AHEGSJCM3L2S637RBGABLAFW"
success = http.SetAuthPrivateKey(publicKeyId,privKey)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


' Note: When the private key is provided as shown above, Chilkat will automatically add the required x-amz-pay-* headers to the HTTP request,
' and will also sign the request.  Nothing more is needed.
' Chilkat automatically generates and adds the following headers:
' 
' x-amz-pay-date
' x-amz-pay-host
' x-amz-pay-region
' Authorization

http.Accept = "application/json"

' Use the actual chargeId here:
success = http.SetUrlVar("chargeId","bd504926-f659-4ad7-a1a9-9a747aaf5275")
' To use the live system, replace "sandbox" with "live" in the URL passed to PTextSb.
' Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
Dim resp As Chilkat.HttpResponse = http.PTextSb("DELETE","https://pay-api.amazon.eu/sandbox/v2/charges/{$chargeId}/cancel",sbRequestBody,"utf-8","application/json",False,False)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim sbResponseBody As New Chilkat.StringBuilder
resp.GetBodySb(sbResponseBody)
Dim jResp As New Chilkat.JsonObject
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

' If the status code is not equal to 200, this will display error information.
Debug.WriteLine("Response Body:")
Debug.WriteLine(jResp.Emit())

Dim respStatusCode As Integer = resp.StatusCode
Debug.WriteLine("Response Status Code = " & respStatusCode)
If (respStatusCode <> 200) Then
    Debug.WriteLine("Failed.")

    Exit Sub
End If




' Sample JSON response:
' (Sample code for parsing the JSON response is shown below)

' {
'   "chargeId": "P21-1111111-1111111-C111111",
'   "chargePermissionId": "P21-1111111-1111111",
'   "chargeAmount": {
'     "amount": "14.00",
'     "currencyCode": "USD"
'   },
'   "captureAmount": {
'     "amount": "14.00",
'     "currencyCode": "USD"
'   },
'   "refundedAmount": {
'     "amount": "0.00",
'     "currencyCode": "USD"
'   },
'   "convertedAmount": "14.00",
'   "conversionRate": "1.00",
'   "softDescriptor": "SOFT DESCRIPTOR",
'   "merchantMetadata": null,
'   "providerMetadata": {
'     "providerReferenceId": null
'   },
'   "statusDetails": {
'     "state": "Canceled",
'     "reasonCode": null,
'     "reasonDescription": null,
'     "lastUpdatedTimestamp": "20190714T155300Z"
'   },
'   "creationTimestamp": "20190714T155300Z",
'   "expirationTimestamp": "20190715T155300Z",
'   "releaseEnvironment": "Sandbox"
' }

' Sample code for parsing the JSON response...
' Use the following online tool to generate parsing code from sample JSON:
' Generate Parsing Code from JSON




Dim chargeId As String = jResp.StringOf("chargeId")
Dim chargePermissionId As String = jResp.StringOf("chargePermissionId")
Dim chargeAmountAmount As String = jResp.StringOf("chargeAmount.amount")
Dim chargeAmountCurrencyCode As String = jResp.StringOf("chargeAmount.currencyCode")
Dim captureAmountAmount As String = jResp.StringOf("captureAmount.amount")
Dim captureAmountCurrencyCode As String = jResp.StringOf("captureAmount.currencyCode")
Dim refundedAmountAmount As String = jResp.StringOf("refundedAmount.amount")
Dim refundedAmountCurrencyCode As String = jResp.StringOf("refundedAmount.currencyCode")
Dim convertedAmount As String = jResp.StringOf("convertedAmount")
Dim conversionRate As String = jResp.StringOf("conversionRate")
Dim softDescriptor As String = jResp.StringOf("softDescriptor")
Dim merchantMetadata As String = jResp.StringOf("merchantMetadata")
Dim providerMetadataProviderReferenceId As String = jResp.StringOf("providerMetadata.providerReferenceId")
Dim statusDetailsState As String = jResp.StringOf("statusDetails.state")
Dim statusDetailsReasonCode As String = jResp.StringOf("statusDetails.reasonCode")
Dim statusDetailsReasonDescription As String = jResp.StringOf("statusDetails.reasonDescription")
Dim statusDetailsLastUpdatedTimestamp As String = jResp.StringOf("statusDetails.lastUpdatedTimestamp")
Dim creationTimestamp As String = jResp.StringOf("creationTimestamp")
Dim expirationTimestamp As String = jResp.StringOf("expirationTimestamp")
Dim releaseEnvironment As String = jResp.StringOf("releaseEnvironment")