(PureBasic) Amazon Pay - Create Refund

See more Amazon Pay Examples

Initiate a full or partial refund for a charge.

Note: This example requires Chilkat v9.5.0.89 or later. Contact support@chilkatsoft.com to get a v9.5.0.89 pre-release for testing.

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

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkHttpResponse.pb"
IncludeFile "CkHttp.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkPrivateKey.pb"

Procedure ChilkatExample()

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

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i

    ; Implements the following CURL command:

    ; curl "https://pay-api.amazon.com/:version/refunds/" \
    ; -X POST
    ; -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
    ; -H "x-amz-pay-date:20201012T235046Z"
    ; -H "x-amz-pay-idempotency-key:AVLo5tI10BHgEk2jEXAMPLEKEY"
    ; -d '{
    ;     "chargeId": "CHARGE_ID",
    ;     "refundAmount": {
    ;         "amount": "14.00",
    ;         "currencyCode": "USD"
    ;     },
    ;     "softDescriptor": "Descriptor"
    ; }'

    ; 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.

    ; {
    ;     "chargeId": "CHARGE_ID",
    ;     "refundAmount": {
    ;         "amount": "14.00",
    ;         "currencyCode": "USD"
    ;     },
    ;     "softDescriptor": "Descriptor"
    ; }

    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckUpdateString(json,"chargeId","CHARGE_ID")
    CkJsonObject::ckUpdateString(json,"refundAmount.amount","14.00")
    CkJsonObject::ckUpdateString(json,"refundAmount.currencyCode","USD")
    CkJsonObject::ckUpdateString(json,"softDescriptor","Descriptor")

    ; 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.
    privKey.i = CkPrivateKey::ckCreate()
    If privKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkPrivateKey::ckLoadPemFile(privKey,"C:/someDir/myAmazonPayPrivateKey.pem")
    If success = 0
        Debug CkPrivateKey::ckLastErrorText(privKey)
        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(json)
        CkPrivateKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    ; 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
    publicKeyId.s = "SANDBOX-AHEGSJCM3L2S637RBGABLAFW"
    success = CkHttp::ckSetAuthPrivateKey(http,publicKeyId,privKey)
    If success = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(json)
        CkPrivateKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    ; 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
    ; x-amz-pay-idempotency-key
    ; Authorization

    CkHttp::setCkAccept(http, "application/json")

    ; To use the live system, replace "sandbox" with "live" in the URL passed to PostJson3.
    ; Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
    resp.i = CkHttp::ckPostJson3(http,"https://pay-api.amazon.eu/sandbox/v2/refunds/","application/json",json)
    If CkHttp::ckLastMethodSuccess(http) = 0
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(json)
        CkPrivateKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    sbResponseBody.i = CkStringBuilder::ckCreate()
    If sbResponseBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkHttpResponse::ckGetBodySb(resp,sbResponseBody)
    jResp.i = CkJsonObject::ckCreate()
    If jResp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoadSb(jResp,sbResponseBody)
    CkJsonObject::setCkEmitCompact(jResp, 0)

    ; If the status code is not equal to 201, this will display error information.
    Debug "Response Body:"
    Debug CkJsonObject::ckEmit(jResp)

    respStatusCode.i = CkHttpResponse::ckStatusCode(resp)
    Debug "Response Status Code = " + Str(respStatusCode)
    If respStatusCode <> 201
        Debug "Failed."
        CkHttpResponse::ckDispose(resp)

        CkHttp::ckDispose(http)
        CkJsonObject::ckDispose(json)
        CkPrivateKey::ckDispose(privKey)
        CkStringBuilder::ckDispose(sbResponseBody)
        CkJsonObject::ckDispose(jResp)
        ProcedureReturn
    EndIf

    CkHttpResponse::ckDispose(resp)

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

    ; {
    ;      "refundId": "S01-5105180-3221187-R022311",
    ;      "chargeId": "S01-5105180-3221187-C056351",
    ;      "refundAmount": {
    ;          "amount": "14.00",
    ;          "currencyCode": "USD"
    ;      },
    ;      "softDescriptor": "Descriptor",
    ;      "creationTimestamp": "20190714T155300Z",
    ;      "statusDetails": {
    ;          "state": "RefundInitiated",
    ;          "reasonCode": null,
    ;          "reasonDescription": null,
    ;          "lastUpdatedTimestamp": "20190714T155300Z"
    ;      },
    ;      "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

    refundId.s = CkJsonObject::ckStringOf(jResp,"refundId")
    chargeId.s = CkJsonObject::ckStringOf(jResp,"chargeId")
    refundAmountAmount.s = CkJsonObject::ckStringOf(jResp,"refundAmount.amount")
    refundAmountCurrencyCode.s = CkJsonObject::ckStringOf(jResp,"refundAmount.currencyCode")
    softDescriptor.s = CkJsonObject::ckStringOf(jResp,"softDescriptor")
    creationTimestamp.s = CkJsonObject::ckStringOf(jResp,"creationTimestamp")
    statusDetailsState.s = CkJsonObject::ckStringOf(jResp,"statusDetails.state")
    statusDetailsReasonCode.s = CkJsonObject::ckStringOf(jResp,"statusDetails.reasonCode")
    statusDetailsReasonDescription.s = CkJsonObject::ckStringOf(jResp,"statusDetails.reasonDescription")
    statusDetailsLastUpdatedTimestamp.s = CkJsonObject::ckStringOf(jResp,"statusDetails.lastUpdatedTimestamp")
    releaseEnvironment.s = CkJsonObject::ckStringOf(jResp,"releaseEnvironment")


    CkHttp::ckDispose(http)
    CkJsonObject::ckDispose(json)
    CkPrivateKey::ckDispose(privKey)
    CkStringBuilder::ckDispose(sbResponseBody)
    CkJsonObject::ckDispose(jResp)


    ProcedureReturn
EndProcedure