(Objective-C) 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 Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoCrypt2.h>
#import <CkoPrng.h>
#import <NSString.h>
#import <CkoDateTime.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <CkoHttpResponse.h>

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

CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init];
CkoPrng *prng = [[CkoPrng alloc] init];
BOOL success;

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

// The nonce is a random number (bytes), something like "6057786719490086000"
NSString *nonce = [prng GenRandom: [NSNumber numberWithInt: 8] encoding: @"decimal"];
NSLog(@"%@%@",@"nonce = ",nonce);

CkoDateTime *dtNow = [[CkoDateTime alloc] init];
[dtNow SetFromCurrentSystemTime];
CkoStringBuilder *sbTimestamp = [[CkoStringBuilder alloc] init];
// Get the epoch timestamp in seconds
[sbTimestamp Append: [dtNow GetAsUnixTimeStr: NO]];
// 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).
NSString *timestamp = [sbTimestamp GetAsString];
NSLog(@"%@%@",@"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"
//   }
// }

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"merchant_ref" value: @"Astonishing-Sale"];
[json UpdateString: @"transaction_type" value: @"authorize"];
[json UpdateString: @"method" value: @"credit_card"];
[json UpdateString: @"amount" value: @"1299"];
[json UpdateString: @"currency_code" value: @"USD"];
[json UpdateString: @"credit_card.type" value: @"visa"];
[json UpdateString: @"credit_card.cardholder_name" value: @"John Smith"];
[json UpdateString: @"credit_card.card_number" value: @"4788250000028291"];
[json UpdateString: @"credit_card.exp_date" value: @"1020"];
[json UpdateString: @"credit_card.cvv" value: @"123"];
json.EmitCompact = NO;
NSLog(@"%@",[json Emit]);

// string hashData = apiKey + nonce + timestamp + token + jsonString;
CkoStringBuilder *sbHmacData = [[CkoStringBuilder alloc] init];
[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.EncodingMode = @"hexlower";
crypt.MacAlgorithm = @"hmac";
[crypt SetMacKeyString: apiSecret];
crypt.HashAlgorithm = @"sha256";
crypt.Charset = @"utf-8";
NSString *hexHash = [crypt MacStringENC: [sbHmacData GetAsString]];
NSLog(@"%@%@",@"hexHash = ",hexHash);

// Now base64 encode the hex string:
CkoStringBuilder *sbBase64Hash = [[CkoStringBuilder alloc] init];
[sbBase64Hash Append: hexHash];
[sbBase64Hash Encode: @"base64" charset: @"utf-8"];

NSLog(@"%@",@"This is the Authorization header to be sent with the payeezy request:");
NSLog(@"%@%@",@"Authorization: ",[sbBase64Hash GetAsString]);

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

CkoHttp *http = [[CkoHttp alloc] init];

http.Accept = @"*/*";
http.UserAgent = @"";
[http SetRequestHeader: @"Authorization" value: [sbBase64Hash GetAsString]];
[http SetRequestHeader: @"apikey" value: apiKey];
[http SetRequestHeader: @"nonce" value: nonce];
[http SetRequestHeader: @"timestamp" value: timestamp];
[http SetRequestHeader: @"token" value: token];

http.SessionLogFilename = @"qa_output/payeezy.txt";

NSString *url = @"https://api-cert.payeezy.com/v1/transactions";
CkoHttpResponse *resp = [http PostJson2: url contentType: @"application/json" jsonText: [json Emit]];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@%d",@"response status code = ",[resp.StatusCode intValue]);
[json Load: resp.BodyStr];
NSLog(@"%@",[json 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"
// }
// 

NSLog(@"%@",[json StringOf: @"correlation_id"]);
NSLog(@"%@",[json StringOf: @"transaction_status"]);
NSLog(@"%@",[json StringOf: @"validation_status"]);
NSLog(@"%@",[json StringOf: @"transaction_type"]);
NSLog(@"%@",[json StringOf: @"transaction_id"]);
NSLog(@"%@",[json StringOf: @"transaction_tag"]);
NSLog(@"%@",[json StringOf: @"method"]);
NSLog(@"%@",[json StringOf: @"amount"]);
NSLog(@"%@",[json StringOf: @"currency"]);
NSLog(@"%@",[json StringOf: @"cvv2"]);
NSLog(@"%@",[json StringOf: @"token.token_type"]);
NSLog(@"%@",[json StringOf: @"token.token_data.value"]);
NSLog(@"%@",[json StringOf: @"card.type"]);
NSLog(@"%@",[json StringOf: @"card.cardholder_name"]);
NSLog(@"%@",[json StringOf: @"card.card_number"]);
NSLog(@"%@",[json StringOf: @"card.exp_date"]);
NSLog(@"%@",[json StringOf: @"bank_resp_code"]);
NSLog(@"%@",[json StringOf: @"bank_message"]);
NSLog(@"%@",[json StringOf: @"gateway_resp_code"]);
NSLog(@"%@",[json StringOf: @"gateway_message"]);