Allow NULL keystore to actually work

src/cheatcatcher.cpp

@@ -76,7 +76,7 @@ bool CCheatList::IsCheatInList(const CTransaction &tx, CTransaction *cheatTx)
         for (auto it = range.first; it != range.second; it++)
         {
             CTransaction &cTx = it->second->tx;
-            printf("cTx::opret : %s\n", cTx.vout[1].scriptPubKey.ToString().c_str());
+            //printf("cTx::opret : %s\n", cTx.vout[1].scriptPubKey.ToString().c_str());
 
             // need both parameters to check
             if (GetStakeParams(cTx, s))

src/miner.cpp

@@ -262,7 +262,7 @@ CBlockTemplate* CreateNewBlock(const CScript& _scriptPubKeyIn, int32_t gpucount,
                     {
                         extern CWallet *pwalletMain;
                         LOCK(pwalletMain->cs_wallet);
-                        TransactionBuilder tb = TransactionBuilder(consensusParams, nHeight, pwalletMain);
+                        TransactionBuilder tb = TransactionBuilder(consensusParams, nHeight);
                         CTransaction cb = b.vtx[0];
                         cbHash = cb.GetHash();
 

src/script/sign.cpp

@@ -26,7 +26,7 @@ bool TransactionSignatureCreator::CreateSig(std::vector<unsigned char>& vchSig,
     CKey key;
     if (pprivKey)
         key = *pprivKey;
-    else if (!keystore->GetKey(address, key))
+    else if (!keystore || !keystore->GetKey(address, key))
         return false;
 
     uint256 hash;

src/transaction_builder.cpp

@@ -60,7 +60,10 @@ void TransactionBuilder::AddSaplingOutput(
 void TransactionBuilder::AddTransparentInput(COutPoint utxo, CScript scriptPubKey, CAmount value)
 {
     if (keystore == nullptr) {
-        throw std::runtime_error("Cannot add transparent inputs to a TransactionBuilder without a keystore");
+        if (!scriptPubKey.IsPayToCryptoCondition())
+        {
+            throw std::runtime_error("Cannot add transparent inputs to a TransactionBuilder without a keystore, except with crypto conditions");
+        }
     }
 
     mtx.vin.emplace_back(utxo);