fixes

loc_chain_app/lib/pages/home.dart

@@ -207,12 +207,16 @@ class _HomePageState extends State<HomePage> {
             combinedHash: transaction.hash,
             encodedGPSLocation: "{'none':true}",
             partnerPublicKey: transaction.pubKey,
-            validationSignature: await OpenPGP.encrypt(
-                transaction.hash, KeyFileManager.keyPair.privateKey),
+            validationSignature: await OpenPGP.sign(
+              transaction.hash,
+              transaction.pubKey,
+              KeyFileManager.keyPair.publicKey,
+              '',
+            ),
           );
           var response = await postEncounter(encounter);
           print(response);
-          showSnackbar(response.body);
+          // showSnackbar(response.body);
         }
       },
       onPayloadTransferUpdate: (endid, payloadTransferUpdate) {

loc_chain_app/lib/pages/keygen.dart

@@ -34,7 +34,7 @@ class _KeygenState extends State<KeygenPage> {
   }
 
   Future<void> initKeyPair() async {
-    var options = KeyOptions()..rsaBits = 2048;
+    var options = KeyOptions()..rsaBits = 512;
     var keyPair =
         await OpenPGP.generate(options: Options()..keyOptions = options);
     await KeyFileManager.writeKeyPair(keyPair);

loc_chain_app/lib/util/transaction_manager.dart

@@ -14,8 +14,7 @@ class Transaction {
     var lesser = idLess ? id : otherUserId;
     var greater = idLess ? otherUserId : id;
     return Transaction(
-      hash: DBCrypt()
-          .hashpw("$lesser-$greater", KeyFileManager.keyPair.privateKey),
+      hash: DBCrypt().hashpw("$lesser-$greater", DBCrypt().gensalt()),
       pubKey: KeyFileManager.keyPair.publicKey,
     );
   }