Fix sendtomainchain with pak when subtracting fee from output

Author: instagibbs

src/wallet/rpcwallet.cpp

@@ -5195,7 +5195,7 @@ UniValue sendtomainchain_pak(const JSONRPCRequest& request)
 
     bool subtract_fee = false;
     if (request.params.size() > 2) {
-        subtract_fee = request.params[1].get_bool();
+        subtract_fee = request.params[2].get_bool();
     }
 
     CPAKList paklist = g_paklist_blockchain;

test/functional/feature_pak.py

@@ -410,6 +410,10 @@ def compare(actual, expected):
                     raise Exception("Found unexpected peg-out output")
         assert(peg_out_found)
 
+        # Test that subtracting fee from output works
+        self.nodes[i_pak1].sendtomainchain("", self.nodes[i_pak1].getbalance()["bitcoin"], True)
+        assert_equal(self.nodes[i_pak1].getbalance()["bitcoin"], 0)
+
         # TODO: create rawsendtomainchain to do transaction surgery for testing
 
 if __name__ == '__main__':