Fix compile issues

src/rpcserver.h

@@ -179,6 +179,7 @@ extern UniValue getaddressutxos(const UniValue& params, bool fHelp);
 extern UniValue getaddressdeltas(const UniValue& params, bool fHelp);
 extern UniValue getaddresstxids(const UniValue& params, bool fHelp);
 extern UniValue getaddressbalance(const UniValue& params, bool fHelp);
+extern UniValue getsnapshot(const UniValue& params, bool fHelp);
 
 extern UniValue getpeerinfo(const UniValue& params, bool fHelp);
 extern UniValue ping(const UniValue& params, bool fHelp);

src/txdb.h

@@ -13,6 +13,7 @@
 #include <string>
 #include <utility>
 #include <vector>
+#include <univalue.h>
 
 class CBlockFileInfo;
 class CBlockIndex;
@@ -95,6 +96,7 @@ public:
     bool ReadFlag(const std::string &name, bool &fValue);
     bool LoadBlockIndexGuts();
     bool blockOnchainActive(const uint256 &hash);
+    UniValue Snapshot(int top);
 };
 
 #endif // BITCOIN_TXDB_H