starting to support zsweepexclude functionality

src/init.cpp

@@ -471,6 +471,7 @@ std::string HelpMessage(HelpMessageMode mode)
     // By default we only allow sweeping to the current wallet which must have the spending key of the sweep zaddr
     // This hopefully will make it harder for people to accidentally sweep funds to a wrong zaddr and lose funds
     strUsage += HelpMessageOpt("-zsweepexternal", _("Enable sweeping to an external wallet (default false)"));
+    strUsage += HelpMessageOpt("-zsweepexclude", _("Addresses to exclude from sweeping (default none)"));
 
     strUsage += HelpMessageOpt("-deletetx", _("Enable Old Transaction Deletion"));
     strUsage += HelpMessageOpt("-deleteinterval", strprintf(_("Delete transaction every <n> blocks during inital block download (default: %i)"), DEFAULT_TX_DELETE_INTERVAL));
@@ -2094,6 +2095,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
 
             //Validate Sapling Addresses
             vector<string>& vSweep = mapMultiArgs["-zsweepaddress"];
+            vector<string>& vSweepExclude = mapMultiArgs["-zsweepexclude"];
             if (vSweep.size() != 1) {
                 return InitError("A single zsweep address must be specified.");
             }
@@ -2117,6 +2119,20 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
                 }
             }
 
+            for (int i = 0; i < vSweepExclude.size(); i++) {
+                // LogPrintf("Sweep Excluded Address: %s\n", vSweepExclude[i]);
+                auto zSweepExcluded = DecodePaymentAddress(vSweepExclude[i]);
+                if (!IsValidPaymentAddress(zSweepExcluded)) {
+                    return InitError("Invalid zsweep address");
+                }
+                auto hasSpendingKey = boost::apply_visitor(HaveSpendingKeyForPaymentAddress(pwalletMain), zSweepExcluded);
+                pwalletMain->sweepExcludeAddress = vSweepExclude[i];
+
+                if (!hasSpendingKey) {
+                    return InitError("Wallet must have the spending key of zsweepexclude address");
+                }
+            }
+
             if (pwalletMain->fSaplingConsolidationEnabled) {
                 //Validate 1 Consolidation address only that matches the sweep address
                 vector<string>& vaddresses = mapMultiArgs["-consolidatesaplingaddress"];

src/wallet/wallet.h

@@ -815,6 +815,7 @@ public:
     int sweepFee                      = 10000;
     int sweepMaxInputs                = 200;
     std::string sweepAddress          = "";
+    std::string sweepExcludeAddress   = "";
     std::string consolidationAddress  = "";
 
     void ClearNoteWitnessCache();