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Working solution straight away. Just replace merchantId and merchantKey. #2

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Working solution straight away. Just replace merchantId and merchantKey. #2

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2 changes: 1 addition & 1 deletion pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@
<description>payment integration with paytm</description>

<properties>
<java.version>1.8</java.version>
<java.version>11</java.version>
</properties>

<dependencies>
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155 changes: 76 additions & 79 deletions src/main/java/com/javatechie/spring/paytm/api/PaymentController.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@

import javax.servlet.http.HttpServletRequest;

import com.paytm.pg.merchant.PaytmChecksum;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Controller;
Expand All @@ -14,85 +15,81 @@
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import com.paytm.pg.merchant.CheckSumServiceHelper;

@Controller
public class PaymentController {

@Autowired
private PaytmDetails paytmDetails;
@Autowired
private Environment env;

@GetMapping("/")
public String home() {
return "home";
}

@PostMapping(value = "/pgredirect")
public ModelAndView getRedirect(@RequestParam(name = "CUST_ID") String customerId,
@RequestParam(name = "TXN_AMOUNT") String transactionAmount,
@RequestParam(name = "ORDER_ID") String orderId) throws Exception {

ModelAndView modelAndView = new ModelAndView("redirect:" + paytmDetails.getPaytmUrl());
TreeMap<String, String> parameters = new TreeMap<>();
paytmDetails.getDetails().forEach((k, v) -> parameters.put(k, v));
parameters.put("MOBILE_NO", env.getProperty("paytm.mobile"));
parameters.put("EMAIL", env.getProperty("paytm.email"));
parameters.put("ORDER_ID", orderId);
parameters.put("TXN_AMOUNT", transactionAmount);
parameters.put("CUST_ID", customerId);
String checkSum = getCheckSum(parameters);
parameters.put("CHECKSUMHASH", checkSum);
modelAndView.addAllObjects(parameters);
return modelAndView;
}


@PostMapping(value = "/pgresponse")
public String getResponseRedirect(HttpServletRequest request, Model model) {

Map<String, String[]> mapData = request.getParameterMap();
TreeMap<String, String> parameters = new TreeMap<String, String>();
mapData.forEach((key, val) -> parameters.put(key, val[0]));
String paytmChecksum = "";
if (mapData.containsKey("CHECKSUMHASH")) {
paytmChecksum = mapData.get("CHECKSUMHASH")[0];
}
String result;

boolean isValideChecksum = false;
System.out.println("RESULT : "+parameters.toString());
try {
isValideChecksum = validateCheckSum(parameters, paytmChecksum);
if (isValideChecksum && parameters.containsKey("RESPCODE")) {
if (parameters.get("RESPCODE").equals("01")) {
result = "Payment Successful";
} else {
result = "Payment Failed";
}
} else {
result = "Checksum mismatched";
}
} catch (Exception e) {
result = e.toString();
}
model.addAttribute("result",result);
parameters.remove("CHECKSUMHASH");
model.addAttribute("parameters",parameters);
return "report";
}

private boolean validateCheckSum(TreeMap<String, String> parameters, String paytmChecksum) throws Exception {
return CheckSumServiceHelper.getCheckSumServiceHelper().verifycheckSum(paytmDetails.getMerchantKey(),
parameters, paytmChecksum);
}


private String getCheckSum(TreeMap<String, String> parameters) throws Exception {
return CheckSumServiceHelper.getCheckSumServiceHelper().genrateCheckSum(paytmDetails.getMerchantKey(), parameters);
}




@Autowired
private PaytmDetails paytmDetails;
@Autowired
private Environment env;

@GetMapping("/")
public String home() {
return "home";
}

@PostMapping(value = "/pgredirect")
public ModelAndView getRedirect(@RequestParam(name = "CUST_ID") String customerId,
@RequestParam(name = "TXN_AMOUNT") String transactionAmount,
@RequestParam(name = "ORDER_ID") String orderId) throws Exception {

ModelAndView modelAndView = new ModelAndView("redirect:" + paytmDetails.getPaytmUrl());
TreeMap<String, String> parameters = new TreeMap<>();
paytmDetails.getDetails().forEach((k, v) -> parameters.put(k, v));
parameters.put("MOBILE_NO", env.getProperty("paytm.mobile"));
parameters.put("EMAIL", env.getProperty("paytm.email"));
parameters.put("ORDER_ID", orderId);
parameters.put("TXN_AMOUNT", transactionAmount);
parameters.put("CUST_ID", customerId);
String checkSum = getCheckSum(parameters);
parameters.put("CHECKSUMHASH", checkSum);
modelAndView.addAllObjects(parameters);
return modelAndView;
}


@PostMapping(value = "/pgresponse")
public String getResponseRedirect(HttpServletRequest request, Model model) {

Map<String, String[]> mapData = request.getParameterMap();
TreeMap<String, String> parameters = new TreeMap<String, String>();
mapData.forEach((key, val) -> parameters.put(key, val[0]));
String paytmChecksum = "";
if (mapData.containsKey("CHECKSUMHASH")) {
paytmChecksum = mapData.get("CHECKSUMHASH")[0];
}
String result;

boolean isValideChecksum = false;
System.out.println("RESULT : " + parameters.toString());
try {
isValideChecksum = validateCheckSum(parameters, paytmChecksum);
if (isValideChecksum && parameters.containsKey("RESPCODE")) {
if (parameters.get("RESPCODE").equals("01")) {
result = "Payment Successful";
} else {
result = "Payment Failed";
}
} else {
result = "Checksum mismatched";
}
} catch (Exception e) {
result = e.toString();
}
model.addAttribute("result", result);
parameters.remove("CHECKSUMHASH");
model.addAttribute("parameters", parameters);
return "report";
}

private boolean validateCheckSum(TreeMap<String, String> parameters, String paytmChecksum) throws Exception {
return PaytmChecksum.verifySignature(parameters, paytmDetails.getMerchantKey(), paytmChecksum);
}


private String getCheckSum(TreeMap<String, String> parameters) throws Exception {
return PaytmChecksum.generateSignature(parameters, paytmDetails.getMerchantKey());
}


}
4 changes: 2 additions & 2 deletions src/main/resources/application.properties
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Original file line number Diff line number Diff line change
@@ -1,3 +1,3 @@
server.port=9090
paytm.email=Enter your Email id
paytm.mobile=Enter your mobile number
paytm.email=[email protected]
paytm.mobile=9676964105
8 changes: 4 additions & 4 deletions src/main/resources/application.yml
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Original file line number Diff line number Diff line change
@@ -1,11 +1,11 @@
paytm.payment:
sandbox:
merchantId: {generate your own merchantId}
merchantKey: {generate your merchantKey}
merchantId:
merchantKey:
channelId: WEB
website: WEBSTAGING
website: DEFAULT
industryTypeId: Retail
paytmUrl: https://securegw-stage.paytm.in/order/process
paytmUrl: https://securegw.paytm.in/order/process
callbackUrl: http://localhost:9090/pgresponse
details:
MID: ${paytm.payment.sandbox.merchantid}
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