buildBankUrl method

String buildBankUrl({ required String bankId, required String mobile, required int amount, required String productIdentity, required String productName, required PaymentType paymentType, required String returnUrl, String? productUrl, Map<String, Object>? additionalData, })

Constructs a bank payment URL.

bankId is the unique bank identifier which can be obtained from the bank list API

mobile : The Khalti registered mobile number of payer

amount : The amount value of payment. Amount must be in paisa and greater than equal to 1000 i.e Rs 10

productIdentity : A unique string to identify the product

productName : Descriptive name for the product

paymentType is one of the available PaymentType

returnUrl is the redirection url after successful payment. The redirected URL will be in the following format.

<returnUrl>/?<data>

An additionalData to be sent alongside the payment configuration. This is only for reporting purposes.

See: https://docs.khalti.com/checkout/diy-ebanking/#2-initiate-transaction

Implementation

String buildBankUrl({
  required String bankId,
  required String mobile,
  required int amount,
  required String productIdentity,
  required String productName,
  required PaymentType paymentType,
  required String returnUrl,
  String? productUrl,
  Map<String, Object>? additionalData,
}) {
  final params = {
    'bank': bankId,
    'public_key': publicKey,
    'amount': amount.toString(),
    'mobile': mobile,
    'product_identity': productIdentity,
    'product_name': productName,
    'source': 'custom',
    ...config.raw,
    if (productUrl != null) 'product_url': productUrl,
    if (additionalData != null) ...additionalData.map(_stringifyValue),
    'return_url': returnUrl,
    'payment_type': paymentType.value,
  };
  final uri = Uri.https('khalti.com', 'ebanking/initiate/', params);
  return uri.toString();
}