From db455a328f0ac6a67720c15c5e17be72653d9e0b Mon Sep 17 00:00:00 2001
From: Josh Rickmar <jrick@companyzero.com>
Date: Mon, 19 Aug 2019 21:40:17 -0400
Subject: [PATCH] Correct JSON-RPC passthrough parameters

The previous code would pass all parameters (including null and the
empty array) as the first parameter to all passthrough requests.
---
 rpc/jsonrpc/methods.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/rpc/jsonrpc/methods.go b/rpc/jsonrpc/methods.go
index 44ee09aa1..973071e73 100644
--- a/rpc/jsonrpc/methods.go
+++ b/rpc/jsonrpc/methods.go
@@ -197,7 +197,11 @@ func lazyApplyHandler(s *Server, ctx context.Context, request *dcrjson.Request)
 				return nil, rpcErrorf(dcrjson.ErrRPCClientNotConnected, "RPC passthrough requires dcrd RPC synchronization")
 			}
 			var resp json.RawMessage
-			err := rpc.Call(ctx, request.Method, &resp, request.Params)
+			var params = make([]interface{}, len(request.Params))
+			for i := range request.Params {
+				params[i] = request.Params[i]
+			}
+			err := rpc.Call(ctx, request.Method, &resp, params...)
 			if ctx.Err() != nil {
 				log.Warnf("Canceled RPC method %v invoked by %v: %v", request.Method, remoteAddr(ctx), err)
 				return nil, &dcrjson.RPCError{