Merge asyncdispatch2 let->var changes

eth-rpc/client.nim

@@ -19,7 +19,7 @@ proc call*(self: RpcClient, name: string,
   ## Remotely calls the specified RPC method.
   let id = $self.nextId
   self.nextId.inc
-  let msg = $ %{"jsonrpc": %"2.0", "method": %name, "params": params,
+  var msg = $ %{"jsonrpc": %"2.0", "method": %name, "params": params,
                 "id": %id} & "\c\l"
   let res = await self.transp.write(msg)
   # TODO: Add actions when not full packet was send, e.g. disconnect peer.

eth-rpc/server.nim

@@ -85,7 +85,8 @@ proc sendError*(client: StreamTransport, code: int, msg: string, id: JsonNode,
   ## Send error message to client
   let error = %{"code": %(code), "message": %msg, "data": data}
   debug "Error generated", error = error, id = id
-  result = client.write(wrapReply(id, newJNull(), error))
+  var res = wrapReply(id, newJNull(), error)
+  result = client.write(res)
 
 proc sendJsonError*(state: RpcJsonError, client: StreamTransport, id: JsonNode,
                     data = newJNull()) {.async.} =
@@ -117,7 +118,8 @@ proc processMessage(server: RpcServer, client: StreamTransport,
                               %(methodName & " is not a registered method."))
     else:
       let callRes = await server.procs[methodName](node["params"])
-      discard await client.write(wrapReply(id, callRes, newJNull()))
+      var res = wrapReply(id, callRes, newJNull())
+      discard await client.write(res)
 
 proc processClient(server: StreamServer, client: StreamTransport) {.async, gcsafe.} =
   var rpc = getUserData[RpcServer](server)