Merge pull request #91 from PaystackOSS/fix/java-webhook

fix webhook verification for Java

Author: Andrew-Paystack

dist/doc/payments/webhooks/verifying-transaction.js

@@ -63,7 +63,7 @@ public class HMacExample {
     Mac sha512_HMAC = Mac.getInstance(HMAC_SHA512);      
     sha512_HMAC.init(keySpec);
     byte [] mac_data = sha512_HMAC.
-    doFinal(body.toString().getBytes("UTF-8"));
+    doFinal(body.getBytes("UTF-8"));
     result = DatatypeConverter.printHexBinary(mac_data);
     if(result.toLowerCase().equals(xpaystackSignature)) {
       // you can trust the event, it came from paystack

src/doc/payments/webhooks/verifying-transaction/index.java

@@ -27,7 +27,7 @@ public static void main(String[] args) throws UnsupportedEncodingException, Inva
     Mac sha512_HMAC = Mac.getInstance(HMAC_SHA512);      
     sha512_HMAC.init(keySpec);
     byte [] mac_data = sha512_HMAC.
-    doFinal(body.toString().getBytes("UTF-8"));
+    doFinal(body.getBytes("UTF-8"));
     result = DatatypeConverter.printHexBinary(mac_data);
     if(result.toLowerCase().equals(xpaystackSignature)) {
       // you can trust the event, it came from paystack