initTransaction method

dynamic initTransaction({ String? merchantTransactionId, required String customerMobile, required double amount, required RedirectType redirectType, })

Implementation

initTransaction({
  String? merchantTransactionId,
  required String customerMobile,
  required double amount,
  required RedirectType redirectType,
}) async {
  Map<String, dynamic> body = {
    "merchantId": merchantId,
    "merchantTransactionId": merchantTransactionId ?? uuid.v1(),
    "merchantUserId": merchantUserId,
    "amount": amount,
    "redirectUrl": redirectUrl,
    "redirectMode":
        redirectType == RedirectType.REDIRECT ? "REDIRECT" : "POST",
    "callbackUrl": callbackUrl,
    "mobileNumber": customerMobile,
    "paymentInstrument": {"type": "PAY_PAGE"}
  };
  String base64String = base64.encode(utf8.encode(jsonEncode(body)));
  String toEncodeToSha256 = '$base64String/pg/v1/pay$salt';
  final String sha256String =
      crypto.sha256.convert(utf8.encode(toEncodeToSha256)).toString();

  final String finalString = '$sha256String###$saltIndex';

  Uri url = Uri.parse(debug
      ? "https://api-preprod.phonepe.com/apis/pg-sandbox/pg/v1/pay"
      : "https://api.phonepe.com/apis/hermes/pg/v1/pay");

  http.Response response = await http
      .post(url, body: json.encode({"request": base64String}), headers: {
    "Content-Type": "application/json",
    "X-VERIFY": finalString,
    "Access-Control-Allow-Credentials": "true",
    'Access-Control-Allow-Origin': '*',
    "Access-Control-Allow-Methods": 'GET, DELETE, HEAD, OPTIONS',
    "Origin": 'api-preprod.phonepe.com',
  });

  print(response.body);

  PaymentResponse paymentResponse =
      PaymentResponse.fromJson(json.decode(response.body));

  await launchUrl(
      Uri.parse(paymentResponse.data.instrumentResponse.redirectInfo.url));

  return paymentResponse;
}