[zPIV[Unit Test] Possible redundant denomination validation.

furszy · furszy · commit fdfd999d10bf · 2019-05-23T13:30:11.000+02:00
diff --git a/src/test/zerocoin_transactions_tests.cpp b/src/test/zerocoin_transactions_tests.cpp
@@ -109,6 +109,11 @@ BOOST_AUTO_TEST_CASE(zerocoin_public_spend_test)
     BOOST_CHECK_MESSAGE(publicSpendTest.HasValidSignature(), "Failed to validate public spend signature");
     BOOST_CHECK_MESSAGE(spend->HasValidSignature(), "Failed to validate spend signature");
 
+    // Verify that fails with a different denomination
+    in.nSequence = 500;
+    PublicCoinSpend publicSpend2(ZCParams);
+    BOOST_CHECK_MESSAGE(!ZPIVModule::validateInput(in, out, tx, publicSpend2), "Different denomination");
+
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/zpiv/zpivmodule.cpp b/src/zpiv/zpivmodule.cpp
@@ -103,10 +103,13 @@ namespace ZPIVModule {
     bool validateInput(const CTxIn &in, const CTxOut &prevOut, const CTransaction &tx, PublicCoinSpend &publicSpend) {
         // Now prove that the commitment value opens to the input
         if (!parseCoinSpend(in, tx, prevOut, publicSpend)) {
-            std::cout << "parse failed" << std::endl;
             return false;
         }
-        // TODO: Validate that the prev out has the same spend denom?
+        if (libzerocoin::ZerocoinDenominationToAmount(
+                libzerocoin::IntToZerocoinDenomination(in.nSequence)) != prevOut.nValue) {
+            return error("PublicCoinSpend validateInput :: input nSequence different to prevout value\n");
+        }
+
         return publicSpend.validate();
     }
 
