wip rpc for nullifiers

src/rpc/server.cpp

@@ -667,6 +667,7 @@ static const CRPCCommand vRPCCommands[] =
     { "wallet",             "z_listoperationids",     &z_listoperationids,     true  },
     { "wallet",             "z_getnewaddress",        &z_getnewaddress,        true  },
     { "wallet",             "z_listaddresses",        &z_listaddresses,        true  },
+    { "wallet",             "z_listnullifiers",       &z_listnullifiers,       true  },
     { "wallet",             "z_exportkey",            &z_exportkey,            true  },
     { "wallet",             "z_importkey",            &z_importkey,            true  },
     { "wallet",             "z_exportviewingkey",     &z_exportviewingkey,     true  },

src/wallet/rpcwallet.cpp

@@ -3743,6 +3743,34 @@ UniValue z_getnewaddress(const UniValue& params, bool fHelp, const CPubKey& mypk
     }
 }
 
+UniValue z_listnullifiers(const UniValue& params, bool fHelp, const CPubKey& mypk)
+{
+    if (!EnsureWalletIsAvailable(fHelp))
+        return NullUniValue;
+
+    if (fHelp || params.size() > 1)
+        throw runtime_error(
+            "z_listaddresses ( includeWatchonly )\n"
+            "\nReturns the list of Sprout and Sapling shielded addresses belonging to the wallet.\n"
+            "\nArguments:\n"
+            "1. includeWatchonly (bool, optional, default=false) Also include watchonly addresses (see 'z_importviewingkey')\n"
+            "\nResult:\n"
+            "[                     (json array of string)\n"
+            "  \"zaddr\"           (string) a zaddr belonging to the wallet\n"
+            "  ,...\n"
+            "]\n"
+            "\nExamples:\n"
+            + HelpExampleCli("z_listaddresses", "")
+            + HelpExampleRpc("z_listaddresses", "")
+        );
+
+    LOCK2(cs_main, pwalletMain->cs_wallet);
+    UniValue ret(UniValue::VARR);
+    for (auto nullifier: Nullifiers){
+        ret.push_back(EncodePaymentAddress(addr));
+    }
+    return ret;
+}
 
 UniValue z_listaddresses(const UniValue& params, bool fHelp, const CPubKey& mypk)
 {
@@ -3752,7 +3780,7 @@ UniValue z_listaddresses(const UniValue& params, bool fHelp, const CPubKey& mypk
     if (fHelp || params.size() > 1)
         throw runtime_error(
             "z_listaddresses ( includeWatchonly )\n"
-            "\nReturns the list of Sprout and Sapling shielded addresses belonging to the wallet.\n"
+            "\nReturns the list of Sapling shielded addresses belonging to the wallet.\n"
             "\nArguments:\n"
             "1. includeWatchonly (bool, optional, default=false) Also include watchonly addresses (see 'z_importviewingkey')\n"
             "\nResult:\n"