(Swift 3,4,5...) 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 Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let crypt = CkoCrypt2()!
    let prng = CkoPrng()!
    var success: Bool

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

    // The nonce is a random number (bytes), something like "6057786719490086000"
    var nonce: String? = prng.genRandom(8, encoding: "decimal")
    print("nonce = \(nonce!)")

    let dtNow = CkoDateTime()!
    dtNow.setFromCurrentSystemTime()
    let sbTimestamp = CkoStringBuilder()!
    // 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).
    var timestamp: String? = sbTimestamp.getAsString()
    print("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"
    //   }
    // }

    let json = CkoJsonObject()!
    json.update("merchant_ref", value: "Astonishing-Sale")
    json.update("transaction_type", value: "authorize")
    json.update("method", value: "credit_card")
    json.update("amount", value: "1299")
    json.update("currency_code", value: "USD")
    json.update("credit_card.type", value: "visa")
    json.update("credit_card.cardholder_name", value: "John Smith")
    json.update("credit_card.card_number", value: "4788250000028291")
    json.update("credit_card.exp_date", value: "1020")
    json.update("credit_card.cvv", value: "123")
    json.emitCompact = false
    print("\(json.emit()!)")

    // string hashData = apiKey + nonce + timestamp + token + jsonString;
    let sbHmacData = CkoStringBuilder()!
    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"
    var hexHash: String? = crypt.macStringENC(sbHmacData.getAsString())
    print("hexHash = \(hexHash!)")

    // Now base64 encode the hex string:
    let sbBase64Hash = CkoStringBuilder()!
    sbBase64Hash.append(hexHash)
    sbBase64Hash.encode("base64", charset: "utf-8")

    print("This is the Authorization header to be sent with the payeezy request:")
    print("Authorization: \(sbBase64Hash.getAsString()!)")

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

    let http = CkoHttp()!

    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"

    var url: String? = "https://api-cert.payeezy.com/v1/transactions"
    var resp: CkoHttpResponse? = http.postJson2(url, contentType: "application/json", jsonText: json.emit())
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    print("response status code = \(resp!.statusCode.intValue)")
    json.load(resp!.bodyStr)
    print("\(json.emit()!)")
    resp = nil

    // 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"
    // }
    // 

    print("\(json.string(of: "correlation_id")!)")
    print("\(json.string(of: "transaction_status")!)")
    print("\(json.string(of: "validation_status")!)")
    print("\(json.string(of: "transaction_type")!)")
    print("\(json.string(of: "transaction_id")!)")
    print("\(json.string(of: "transaction_tag")!)")
    print("\(json.string(of: "method")!)")
    print("\(json.string(of: "amount")!)")
    print("\(json.string(of: "currency")!)")
    print("\(json.string(of: "cvv2")!)")
    print("\(json.string(of: "token.token_type")!)")
    print("\(json.string(of: "token.token_data.value")!)")
    print("\(json.string(of: "card.type")!)")
    print("\(json.string(of: "card.cardholder_name")!)")
    print("\(json.string(of: "card.card_number")!)")
    print("\(json.string(of: "card.exp_date")!)")
    print("\(json.string(of: "bank_resp_code")!)")
    print("\(json.string(of: "bank_message")!)")
    print("\(json.string(of: "gateway_resp_code")!)")
    print("\(json.string(of: "gateway_message")!)")

}