(Go) 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.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    crypt := chilkat.NewCrypt2()
    prng := chilkat.NewPrng()
    var success bool

    // An API key such as y6pWAJNyJyjGv66IsVuWnklkKUPFbb0a
    apiKey := "my_api_key"
    // An API secret such as 86fbae7030253af3cd15faef2a1f4b67353e41fb6799f576b5093ae52901e6f7
    apiSecret := "my_api_secret"
    // A token such as fdoa-a480ce8951daa73262734cf102641994c1e55e7cdf4c02b6
    token := "my_merchant_token"

    // The nonce is a random number (bytes), something like "6057786719490086000"
    nonce := prng.GenRandom(8,"decimal")
    fmt.Println("nonce = ", *nonce)

    dtNow := chilkat.NewCkDateTime()
    dtNow.SetFromCurrentSystemTime()
    sbTimestamp := chilkat.NewStringBuilder()
    // Get the epoch timestamp in seconds
    sbTimestamp.Append(*dtNow.GetAsUnixTimeStr(false))
    // Change it to milliseconds
    sbTimestamp.Append("000")
    // The timestamp is a number similar to this: 1546011905000 (which is a timestamp taken on 28-Dec-2018).
    timestamp := sbTimestamp.GetAsString()
    fmt.Println("timestamp = ", *timestamp)

    // 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"
    //   }
    // }

    json := chilkat.NewJsonObject()
    json.UpdateString("merchant_ref","Astonishing-Sale")
    json.UpdateString("transaction_type","authorize")
    json.UpdateString("method","credit_card")
    json.UpdateString("amount","1299")
    json.UpdateString("currency_code","USD")
    json.UpdateString("credit_card.type","visa")
    json.UpdateString("credit_card.cardholder_name","John Smith")
    json.UpdateString("credit_card.card_number","4788250000028291")
    json.UpdateString("credit_card.exp_date","1020")
    json.UpdateString("credit_card.cvv","123")
    json.SetEmitCompact(false)
    fmt.Println(*json.Emit())

    // string hashData = apiKey + nonce + timestamp + token + jsonString;
    sbHmacData := chilkat.NewStringBuilder()
    sbHmacData.Append(apiKey)
    sbHmacData.Append(*nonce)
    sbHmacData.Append(*timestamp)
    sbHmacData.Append(token)
    sbHmacData.Append(*json.Emit())

    // HMAC the data to produce a hex string.
    crypt.SetEncodingMode("hexlower")
    crypt.SetMacAlgorithm("hmac")
    crypt.SetMacKeyString(apiSecret)
    crypt.SetHashAlgorithm("sha256")
    crypt.SetCharset("utf-8")
    hexHash := crypt.MacStringENC(*sbHmacData.GetAsString())
    fmt.Println("hexHash = ", *hexHash)

    // Now base64 encode the hex string:
    sbBase64Hash := chilkat.NewStringBuilder()
    sbBase64Hash.Append(*hexHash)
    sbBase64Hash.Encode("base64","utf-8")

    fmt.Println("This is the Authorization header to be sent with the payeezy request:")
    fmt.Println("Authorization: ", *sbBase64Hash.GetAsString())

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

    http := chilkat.NewHttp()

    http.SetAccept("*/*")
    http.SetUserAgent("")
    http.SetRequestHeader("Authorization",*sbBase64Hash.GetAsString())
    http.SetRequestHeader("apikey",apiKey)
    http.SetRequestHeader("nonce",*nonce)
    http.SetRequestHeader("timestamp",*timestamp)
    http.SetRequestHeader("token",token)

    http.SetSessionLogFilename("qa_output/payeezy.txt")

    url := "https://api-cert.payeezy.com/v1/transactions"
    resp := http.PostJson2(url,"application/json",*json.Emit())
    if http.LastMethodSuccess() != true {
        fmt.Println(http.LastErrorText())
        crypt.DisposeCrypt2()
        prng.DisposePrng()
        dtNow.DisposeCkDateTime()
        sbTimestamp.DisposeStringBuilder()
        json.DisposeJsonObject()
        sbHmacData.DisposeStringBuilder()
        sbBase64Hash.DisposeStringBuilder()
        http.DisposeHttp()
        return
    }

    fmt.Println("response status code = ", resp.StatusCode())
    json.Load(resp.BodyStr())
    fmt.Println(*json.Emit())
    resp.DisposeHttpResponse()

    // 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"
    // }
    // 

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

    crypt.DisposeCrypt2()
    prng.DisposePrng()
    dtNow.DisposeCkDateTime()
    sbTimestamp.DisposeStringBuilder()
    json.DisposeJsonObject()
    sbHmacData.DisposeStringBuilder()
    sbBase64Hash.DisposeStringBuilder()
    http.DisposeHttp()