Randomize signature for txpow

src/rpcrawtransaction.cpp

@@ -1111,6 +1111,7 @@ UniValue signrawtransaction(const UniValue& params, bool fHelp)
             uint256 txid = mergedTx.GetHash();
             if ( ((uint8_t *)&txid)[0] == 0 && ((uint8_t *)&txid)[31] == 0 )
                 break;
+            fprintf(stderr,"%d: tmp txid.%s\n",numiters,txid.GetHex().c_str());
         } else break;
         numiters++;
     }

src/script/sign.cpp

@@ -16,6 +16,7 @@
 using namespace std;
 
 typedef vector<unsigned char> valtype;
+extern uint8_t ASSETCHAINS_TXPOW;
 
 TransactionSignatureCreator::TransactionSignatureCreator(const CKeyStore* keystoreIn, const CTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, int nHashTypeIn) : BaseSignatureCreator(keystoreIn), txTo(txToIn), nIn(nInIn), nHashType(nHashTypeIn), amount(amountIn), checker(txTo, nIn, amountIn) {}
 
@@ -32,8 +33,16 @@ bool TransactionSignatureCreator::CreateSig(std::vector<unsigned char>& vchSig,
         return false;
     }
 
-    if (!key.Sign(hash, vchSig))
+    if ( ASSETCHAINS_TXPOW == 0 )
-        return false;
+    {
+        if (!key.Sign(hash, vchSig))
+            return false;
+    }
+    else
+    {
+        if (!key.Sign(hash, vchSig, rand()))
+            return false;
+    }
     vchSig.push_back((unsigned char)nHashType);
     return true;
 }