WIP donation

src/wallet/asyncrpcoperation_shieldcoinbase.h

@@ -49,6 +49,7 @@ public:
         std::vector<ShieldCoinbaseUTXO> inputs,
         std::string toAddress,
         CAmount fee = SHIELD_COINBASE_DEFAULT_MINERS_FEE,
+        CAmount donation,
         UniValue contextInfo = NullUniValue);
     virtual ~AsyncRPCOperation_shieldcoinbase();
 
@@ -73,9 +74,6 @@ private:
     CAmount fee_;
     PaymentAddress tozaddr_;
 
-    uint256 joinSplitPubKey_;
-    unsigned char joinSplitPrivKey_[crypto_sign_SECRETKEYBYTES];
-
     std::vector<ShieldCoinbaseUTXO> inputs_;
 
     TransactionBuilder builder_;