(MFC) 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 C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkCrypt2.h>
#include <CkPrng.h>
#include <CkDateTime.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.h>
#include <CkHttp.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkCrypt2 crypt;
    CkPrng prng;
    bool success;

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

    // The nonce is a random number (bytes), something like "6057786719490086000"
    const char *nonce = prng.genRandom(8,"decimal");
    strOut.append("nonce = ");
    strOut.append(nonce);
    strOut.append("\r\n");

    CkDateTime dtNow;
    dtNow.SetFromCurrentSystemTime();
    CkStringBuilder sbTimestamp;
    // 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).
    const char *timestamp = sbTimestamp.getAsString();
    strOut.append("timestamp = ");
    strOut.append(timestamp);
    strOut.append("\r\n");

    // 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"
    //   }
    // }

    CkJsonObject json;
    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.put_EmitCompact(false);
    strOut.append(json.emit());
    strOut.append("\r\n");

    // string hashData = apiKey + nonce + timestamp + token + jsonString;
    CkStringBuilder sbHmacData;
    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.put_EncodingMode("hexlower");
    crypt.put_MacAlgorithm("hmac");
    crypt.SetMacKeyString(apiSecret);
    crypt.put_HashAlgorithm("sha256");
    crypt.put_Charset("utf-8");
    const char *hexHash = crypt.macStringENC(sbHmacData.getAsString());
    strOut.append("hexHash = ");
    strOut.append(hexHash);
    strOut.append("\r\n");

    // Now base64 encode the hex string:
    CkStringBuilder sbBase64Hash;
    sbBase64Hash.Append(hexHash);
    sbBase64Hash.Encode("base64","utf-8");

    strOut.append("This is the Authorization header to be sent with the payeezy request:");
    strOut.append("\r\n");
    strOut.append("Authorization: ");
    strOut.append(sbBase64Hash.getAsString());
    strOut.append("\r\n");

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

    CkHttp http;

    http.put_Accept("*/*");
    http.put_UserAgent("");
    http.SetRequestHeader("Authorization",sbBase64Hash.getAsString());
    http.SetRequestHeader("apikey",apiKey);
    http.SetRequestHeader("nonce",nonce);
    http.SetRequestHeader("timestamp",timestamp);
    http.SetRequestHeader("token",token);

    http.put_SessionLogFilename("qa_output/payeezy.txt");

    const char *url = "https://api-cert.payeezy.com/v1/transactions";
    CkHttpResponse *resp = http.PostJson2(url,"application/json",json.emit());
    if (http.get_LastMethodSuccess() != true) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("response status code = ");
    strOut.appendInt(resp->get_StatusCode());
    strOut.append("\r\n");
    json.Load(resp->bodyStr());
    strOut.append(json.emit());
    strOut.append("\r\n");
    delete resp;

    // 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"
    // }
    // 

    strOut.append(json.stringOf("correlation_id"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("transaction_status"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("validation_status"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("transaction_type"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("transaction_id"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("transaction_tag"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("method"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("amount"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("currency"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("cvv2"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("token.token_type"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("token.token_data.value"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("card.type"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("card.cardholder_name"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("card.card_number"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("card.exp_date"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("bank_resp_code"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("bank_message"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("gateway_resp_code"));
    strOut.append("\r\n");
    strOut.append(json.stringOf("gateway_message"));
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }