Visual FoxPro
Payeezy Place Temp Authorization Hold on Buyer’s Credit Card

Demonstrates how to place a temporary authorization hold for the desired amount on the buyer’s credit card. You can Capture the authorized amount on completion of service or Void/Refund the transaction as required.
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LOCAL lnSuccess
LOCAL loCrypt
LOCAL loPrng
LOCAL lcApiKey
LOCAL lcApiSecret
LOCAL lcToken
LOCAL lcNonce
LOCAL loDtNow
LOCAL loSbTimestamp
LOCAL lcTimestamp
LOCAL loJson
LOCAL loSbHmacData
LOCAL lcHexHash
LOCAL loSbBase64Hash
LOCAL loHttp
LOCAL lcUrl
LOCAL loResp

lnSuccess = 0

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

loCrypt = CreateObject('Chilkat.Crypt2')
loPrng = CreateObject('Chilkat.Prng')

* An API key such as y6pWAJNyJyjGv66IsVuWnklkKUPFbb0a
lcApiKey = "my_api_key"
* An API secret such as 86fbae7030253af3cd15faef2a1f4b67353e41fb6799f576b5093ae52901e6f7
lcApiSecret = "my_api_secret"
* A token such as fdoa-a480ce8951daa73262734cf102641994c1e55e7cdf4c02b6
lcToken = "my_merchant_token"

* The nonce is a random number (bytes), something like "6057786719490086000"
lcNonce = loPrng.GenRandom(8,"decimal")
? "nonce = " + lcNonce

loDtNow = CreateObject('Chilkat.CkDateTime')
loDtNow.SetFromCurrentSystemTime()
loSbTimestamp = CreateObject('Chilkat.StringBuilder')
* Get the epoch timestamp in seconds
loSbTimestamp.Append(loDtNow.GetAsUnixTimeStr(0))
* Change it to milliseconds
loSbTimestamp.Append("000")
* The timestamp is a number similar to this: 1546011905000 (which is a timestamp taken on 28-Dec-2018).
lcTimestamp = loSbTimestamp.GetAsString()
? "timestamp = " + lcTimestamp

* Generate the following JSON request body:
* {
*   "merchant_ref": "Astonishing-Sale",
*   "transaction_type": "authorize",
*   "method": "credit_card",
*   "amount": "1299",
*   "currency_code": "USD",
*   "credit_card": {
*     "type": "visa",
*     "cardholder_name": "John Smith",
*     "card_number": "4788250000028291",
*     "exp_date": "1020",
*     "cvv": "123"
*   }
* }

loJson = CreateObject('Chilkat.JsonObject')
loJson.UpdateString("merchant_ref","Astonishing-Sale")
loJson.UpdateString("transaction_type","authorize")
loJson.UpdateString("method","credit_card")
loJson.UpdateString("amount","1299")
loJson.UpdateString("currency_code","USD")
loJson.UpdateString("credit_card.type","visa")
loJson.UpdateString("credit_card.cardholder_name","John Smith")
loJson.UpdateString("credit_card.card_number","4788250000028291")
loJson.UpdateString("credit_card.exp_date","1020")
loJson.UpdateString("credit_card.cvv","123")
loJson.EmitCompact = 0
? loJson.Emit()

* string hashData = apiKey + nonce + timestamp + token + jsonString;
loSbHmacData = CreateObject('Chilkat.StringBuilder')
loSbHmacData.Append(lcApiKey)
loSbHmacData.Append(lcNonce)
loSbHmacData.Append(lcTimestamp)
loSbHmacData.Append(lcToken)
loSbHmacData.Append(loJson.Emit())

* HMAC the data to produce a hex string.
loCrypt.EncodingMode = "hexlower"
loCrypt.MacAlgorithm = "hmac"
loCrypt.SetMacKeyString(lcApiSecret)
loCrypt.HashAlgorithm = "sha256"
loCrypt.Charset = "utf-8"
lcHexHash = loCrypt.MacStringENC(loSbHmacData.GetAsString())
? "hexHash = " + lcHexHash

* Now base64 encode the hex string:
loSbBase64Hash = CreateObject('Chilkat.StringBuilder')
loSbBase64Hash.Append(lcHexHash)
loSbBase64Hash.Encode("base64","utf-8")

? "This is the Authorization header to be sent with the payeezy request:"
? "Authorization: " + loSbBase64Hash.GetAsString()

* -----------------------------------------------------------
* Now that we have the value for the Authorization header, send the POST containing the JSON.

loHttp = CreateObject('Chilkat.Http')

loHttp.Accept = "*/*"
loHttp.UserAgent = ""
loHttp.SetRequestHeader("Authorization",loSbBase64Hash.GetAsString())
loHttp.SetRequestHeader("apikey",lcApiKey)
loHttp.SetRequestHeader("nonce",lcNonce)
loHttp.SetRequestHeader("timestamp",lcTimestamp)
loHttp.SetRequestHeader("token",lcToken)

loHttp.SessionLogFilename = "qa_output/payeezy.txt"

lcUrl = "https://api-cert.payeezy.com/v1/transactions"
loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpJson("POST",lcUrl,loJson,"application/json",loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loCrypt
    RELEASE loPrng
    RELEASE loDtNow
    RELEASE loSbTimestamp
    RELEASE loJson
    RELEASE loSbHmacData
    RELEASE loSbBase64Hash
    RELEASE loHttp
    RELEASE loResp
    CANCEL
ENDIF

? "response status code = " + STR(loResp.StatusCode)
loJson.Load(loResp.BodyStr)
? loJson.Emit()

* Sample JSON response:

* {
*   "correlation_id": "228.4604632998994",
*   "transaction_status": "approved",
*   "validation_status": "success",
*   "transaction_type": "authorize",
*   "transaction_id": "ET175628",
*   "transaction_tag": "2313721985",
*   "method": "credit_card",
*   "amount": "1299",
*   "currency": "USD",
*   "cvv2": "M",
*   "token": {
*     "token_type": "FDToken",
*     "token_data": {
*       "value": "9732261336638291"
*     }
*   },
*   "card": {
*     "type": "visa",
*     "cardholder_name": "John Smith",
*     "card_number": "8291",
*     "exp_date": "1020"
*   },
*   "bank_resp_code": "100",
*   "bank_message": "Approved",
*   "gateway_resp_code": "00",
*   "gateway_message": "Transaction Normal"
* }
* 

? loJson.StringOf("correlation_id")
? loJson.StringOf("transaction_status")
? loJson.StringOf("validation_status")
? loJson.StringOf("transaction_type")
? loJson.StringOf("transaction_id")
? loJson.StringOf("transaction_tag")
? loJson.StringOf("method")
? loJson.StringOf("amount")
? loJson.StringOf("currency")
? loJson.StringOf("cvv2")
? loJson.StringOf("token.token_type")
? loJson.StringOf("token.token_data.value")
? loJson.StringOf("card.type")
? loJson.StringOf("card.cardholder_name")
? loJson.StringOf("card.card_number")
? loJson.StringOf("card.exp_date")
? loJson.StringOf("bank_resp_code")
? loJson.StringOf("bank_message")
? loJson.StringOf("gateway_resp_code")
? loJson.StringOf("gateway_message")

RELEASE loCrypt
RELEASE loPrng
RELEASE loDtNow
RELEASE loSbTimestamp
RELEASE loJson
RELEASE loSbHmacData
RELEASE loSbBase64Hash
RELEASE loHttp
RELEASE loResp