Payments API

Summary

This documentation page contains everything you need to know about integrating to Klasha’s Payment Gateway. Once integration is done, you can begin to process payments from anywhere in the world in seconds.

Whilst you start your integration, please remember to reach out to our Compliance team to go through the KYB process and get your business verified. This is a mandatory process before you can start using our production platform.

If you are going to be implementing the direct charge API, you would require additional verification as this is only available to businesses that are PCI-DSS certified.

Payment collection

As a business owner, here is a way we make it possible for you to collect payments from customers all over the world:

In all the following APIs, you can simply substitute the desired currency to the path variable {{gateway}}.

Before you begin

Get your API keys

Find your keys on the Klasha Dashboard → Settings → Generate API Keys (here)
Klasha Dashboard, Generate API Keys page

Encryption algorithm

Since we are treating payment data, the communication from merchant to APIs must be encrypted. We are using a standard 3DES technology with Padding. Please find some code snippets below for the 3DES encryption:

public static String Encrypt3DES(String messageToEncrypt, byte[] secret) throws NoSuchPaddingException, NoSuchAlgorithmException,
            InvalidAlgorithmParameterException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
    SecretKeySpec secretKeySpec = new SecretKeySpec(secret, "TripleDES");
    byte[] iv = Arrays.copyOfRange(secret, 0, 8);
    IvParameterSpec ivSpec = new IvParameterSpec(iv);

    Cipher encryptCipher =Cipher.getInstance("TripleDES/CBC/PKCS5Padding");
    encryptCipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);

    byte[] secretMessagesBytes=      messageToEncrypt.getBytes(StandardCharsets.UTF_8);
    byte[] encryptedMessageBytes = encryptCipher.doFinal(secretMessagesBytes);

    return Base64.getEncoder().encodeToString(encryptedMessageBytes);
}

public static string Encrypt3DES(string message, string secret)
{
    byte[] secretByte = Encoding.UTF8.GetBytes(secret.Trim());

    using (TripleDESCryptoServiceProvider tripleDES = new TripleDESCryptoServiceProvider())
    {
        tripleDES.Key = secretByte;
        byte[] iv = new byte[8];
        Buffer.BlockCopy(secretByte, 0, iv, 0, 8);
        tripleDES.IV = iv;
        tripleDES.Mode = CipherMode.CBC;
        tripleDES.Padding = PaddingMode.PKCS7;

        ICryptoTransform encryptor = tripleDES.CreateEncryptor(tripleDES.Key, tripleDES.IV);

        byte[] messageBytes = Encoding.UTF8.GetBytes(message);
        byte[] encryptedMessageBytes = encryptor.TransformFinalBlock(messageBytes, 0, messageBytes.Length);

        return Convert.ToBase64String(encryptedMessageBytes);
    }
}

#Ensure you have the pyDes library installed (pip install pyDes)

from pyDes import triple_des, PAD_PKCS5, CBC
import base64

def encrypt_3des(data, key):
    des = triple_des(key, CBC, pad=None, padmode=PAD_PKCS5)

    encrypted_data = des.encrypt(data)
   
    return base64.b64encode(encrypted_data).decode()

# Example usgae:
if __name__ == "__main__":
    # key (24 bytes)
    key = b'Use your 24 bytes key here'
    data = "Hello, Klasha!"
    encrypted_text = encrypt_3des(data, key)
    print("Encrypted text:", encrypted_text)

Card payments

To accept a card payment, you need to integrate with the following flow:

First, initiate the card payment
Then charge the card
And at the end validate the payment (to provide OTP and/or PIN)

Initiate card payment

POST {{env_url}}/pay/aggregators/{{gateway}}/card/payment/v2

You can find more information on the Postman link as well as other APIs.

You’d need to pass, as header the x-auth-token. This can be obtained from your merchant dashboard → Settings → Generate API keys → Merchant public key.

Headers

Name

Value

Request Body (encrypted)

{
    "message": "encrypted-body"
}

Request Body (plain)

{
   "card_number": "507850785078507812",
   "cvv": "081",
   "expiry_month": "05",
   "expiry_year": "25",
   "currency": "NGN",
   "country": "NG",
   "amount": "200",
   "rate": 1,
   "paymentType": "woo",
   "sourceCurrency": "NGN",
   "sourceAmount": 200,
   "rememberMe": true,
   "phone_number": "080344006699",
   "email": "email@klasha.com",
   "fullname": "John Doe",
   "tx_ref": "test910-on2007u047e-2910tytrr76"
}

Response

{
    "message": "success",
    "error": null,
    "data": {
        "tx_ref": null,
        "data": {
           "status": "success",
            "message": "Charge authorization data required",
            "meta": {
                "authorization": {
                    "mode": "pin",
                    "fields": [
                        "pin"
                    ]
                }
            }
        }
    }
}

This is for cards that are covered by 3DS flows.
{
    "tx_ref": "klasha-add-bank-card-1697954ttt947238348",
    "redirectUrl": "https://coreflutterwavestaging.com/flwmpgs/trxauth?hid=712b85a8542649e68c19b1c80d81aadc",
    "data": {
        "meta": {
            "authorization": {
                "mode": "redirect",
                "redirect": "https://coreflutterwavestaging.com/flwmpgs/trxauth?hid=712b85a8542649e68c19b1c80d81aadc"
            }
        }
    }
}

{
    "message": "success",
    "error": null,
    "data": {
        "tx_ref": null,
        "data": {
           "status": "success",
            "message": "Charge authorization data required",
            "meta": {
                "authorization": {
                    "mode": "avs_noauth",
                    "fields": [
                        "city",
                        "address",
                        "state",
                        "country",
                        "zipcode"
                    ]
                }
            }
        }
    }
}

{
    "status": "error",
    "message": "Card number is invalid",
    "data": null,
    "tx_ref": "klasha-add-bank-card-1697954ttt947238348"
}

Charge card

POST {{env_url}}/pay/aggregators/{{gateway}}/charge/card/v2

You can find more information on the Postman link as well as other APIs.

You’d need to pass, as header the x-auth-token. This can be obtained from your merchant dashboard → Settings → Generate API keys → Merchant public key.

Headers

Name

Value

Request Body (encrypted)

{
    "message": "encrypted-body"
}

Request Body (plain)

The tx-ref is contained in the successful response of the initiate payment call.

{
    "mode": "pin",
    "pin": "1111",
    "tx_ref": "test910-on2007u047e-2910tytrr76"
}

{
    "mode": "avs_noauth",
    "city": "city",
    "address": "address",
    "state": "state",
    "country": "country",
    "zipcode": "zipcode",
    "tx_ref": "test910-on2007u047e-2910tytrr76"
}

Response

{
    "message": "success",
    "error": null,
    "data": {
       "tx_ref": "test910-on2007u047e-2910tytrr76",
       "message": "Please enter the OTP sent to your mobile number 080****** and email te**@rave**.com",
       "status": "pending"
    }
}

{
    "status": "error",
    "message": "Invalid Pin",
    "data": null,
    "tx_ref": "klasha-add-bank-card-odochi_test_test11"
}

Validate card

POST {{env_url}}/pay/aggregators/{{gateway}}/validate/card/v2

You can find more information on the Postman link as well as other APIs.

You would need to pass, as header the x-auth-token. This can be obtained from your merchant dashboard → Settings → Generate API keys → Merchant public key.

Headers

Name

Value

Request Body (encrypted)

{
    "message": "encrypted-body"
}

Request Body (plain)

The tx-ref is contained in the successful response of the initiate payment call.

{
  "otp": "123456",
  "tx_ref": "test910-on2007u047e-291076",
  "type": "card"
}

Response

{
    "message": "success",
    "error": null,
    "data": {
       "tx_ref": "test910-on2007u047e-291076",
       "amount": 200.0,
       "processor_response": "successful",
       "message": "Charge validated",
       "status": "successful"
    }
}

{
    "status": "error",
    "message": "Invalid OTP",
    "data": null,
    "tx_ref": "klasha-add-bank-card-odochi_test_test11"
}

Bank transfer

POST {{env_url}}/pay/aggregators/{{gateway}}/banktransfer/v2

You can find more information on the Postman link as well as other APIs.

You’d need to pass, as header the x-auth-token. This can be obtained from your merchant dashboard → Settings → Generate API keys → Merchant public key.

Headers

Name

Value

Request Body (encrypted)

{
    "message": "encrypted-body"
}

Request Body (plain)

{
   "tx_ref": "MC-15856767458ffdgddfefhqweert",
   "amount": "500",
   "email": "email@gmail.com",
   "phone_number": "054709929220",
   "currency": "NGN",
   "narration": "A payment",
   "rate": 1.0,
   "paymentType": "woo",
   "sourceCurrency": "NGN",
   "sourceAmount": 500,
   "fullname": "Test"
}

Response

{
    "message": "success",
    "error": null,
    "data": {
        "tx_ref": "MC-15856767458ffdgddfefhqweert",
        "meta": {
            "authorization": {
                "mode": "banktransfer",
                "transfer_note": "Please make a bank transfer to Klasha - Collection",
                "transfer_amount": 500.0,
                "transfer_bank": "WEMA BANK",
                "account_expiration": "2024-05-23T13:55:13.105",
                "transfer_account": "8574551243"
            }
        },
        "message": "Charge initiated",
        "status": "success"
    }
}

M-Pesa

POST {{env_url}}/pay/aggregators/{{gateway}}/card/payment/v2

You can find more information on the Postman link as well as other APIs.

You would need to pass, as header the x-auth-token. This can be obtained from your merchant dashboard → Settings → Generate API keys → Merchant public key.

Headers

Name

Value

Request Body (encrypted)

{
    "message": "encrypted-body"
}

Request Body (plain)

{
   "currency": "KES",
   "country": "KE",
   "amount": "10",
   "rate": 680,
   "paymentType": "woo",
   "sourceCurrency": "USD",
   "sourceAmount": 1,
   "rememberMe": true,
   "option": "mpesa",
   "phone_number": "+254710000000",
   "email": "email@klasha.com",
   "fullname": "John Doe",
   "tx_ref": "test910-on2007u047e-291076"
}

Response

{
    "message": "success",
    "error": null,
    "data": {
        "tx_ref": "test910-on2007u047e-291076",
        "data": {
            "amount": "10",
            "charged_amount": "10",
            "currency": "KES",
            "customer": {
                "name": "John Doe",
                "phone_number": "+254710000000",
                "email": "email@klasha.com"
            },
            "status": "pending"
        },
        "message": "Transaction in progress",
        "status": "pending"
    }
}

{
    "tx_ref": "test910-on2007u047e-mcnvmlbhgmjfo",
    "data": null,
    "message": "Invalid phone number format",
    "status": "error"
}

Mobile money

POST {{env_url}}/pay/aggregators/{{gateway}}/mobilemoney/v2

You can find more information on the Postman link as well as other APIs.

You would need to pass, as header the x-auth-token. This can be obtained from your merchant dashboard → Settings → Generate API keys → Merchant public key.

Headers

Name

Value

Request Body (encrypted)

{
    "message": "encrypted-body"
}

Request Body (plain)

{
   "currency": "UGX",
   "amount":"100",
   "paymentType": "woo",
   "sourceCurrency": "UGX",
   "sourceAmount": 100,
   "rate": 100,
   "phone_number": "080344006699",
   "email":"stephen@klasha.com",
   "fullname":"John Doe",
   "tx_ref":"test910-on2007u047e-291076"
}

Response

{
    "message": "success",
    "error": null,
    "data": {
        "status": "success",
        "message": "Charge initiated",
        "tx_ref": "test910-on2007u047e-iwmqimenrUMM",
        "data": {
            "amount": 100.0,
            "charged_amount": 100.0,
            "currency": "UGX",
            "status": "pending",
            "customer": {
                "id": 2433975.0,
                "phone_number": "080344006699",
                "name": "John Doe",
                "email": "stephen@klasha.com",
                "created_at": "2024-06-21T13:19:30.000Z"
            }
        }
    }
}

{
    "tx_ref": "test910-on2007u047e-291076",
    "data": null,
    "message": "Invalid phone number format",
    "status": "error"
}

Initiate a refund

POST {{env_url}}/nucleus/refund/initiate/v3

You would need to pass, as header the x-auth-token. This can be obtained from your merchant dashboard → Settings → Generate API keys → Merchant public key.

Headers

Name

Value

Request Body (encrypted)

{
    "message": "encrypted-body"
}

Request Body (plain)

{
    "txRef": "txRef",
    "amount": 500,
    "refundType": "partial"
}

Name

Description

Response

{
    "message": "success",
    "error": null,
    "data": {
        "txRef": "txRef",
        "refundTnxId": 12222,
        "businessId": 133,
        "refundedAmount": 500,
        "status": "pending"
    }
}

{
    "message": "Given final block not properly padded. Such issues can arise if a bad key is used during decryption.",
    "error": "Bad Request",
    "data": null
}

Get a refund

GET {{env_url}}/nucleus/refund/status/{{txRef}}/v2

Headers

Name

Value

Response

{
    "message": "success",
    "error": null,
    "data": [
        {
            "refundType": "full",
            "txRef": "txRef",
            "refundTnxId": null,
            "businessId": 133,
            "refundedAmount": null,
            "status": "pending"
        }
    ]
}

{
    "message": "Given final block not properly padded. Such issues can arise if a bad key is used during decryption.",
    "error": "Bad Request",
    "data": null
}

Generate a bearer token

Token Generation

Exchange rate

POST {{env_url}}/nucleus/general/exchange/

Make a POST call to the exchange rate API.

Headers

Name

Value

Request Body

Name

Description

Response

{
    "message": "success",
    "error": null,
    "data": {
        "amount": 1557632.40,
        "rate": 0.000642,
        "buyingRate": 0.000676,
        "destinationCurrency": "NGN",
        "sourceCurrency": "USD",
        "cards": null
    }
}

{
    "message": "No exchange found",
    "error": "Not Found",
    "data": null
}

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