From 81ccfef0686a4cf721e773df7c381aee8644bdc9 Mon Sep 17 00:00:00 2001
From: Igor Artamonov <igor@artamonov.ru>
Date: Sun, 23 Feb 2020 22:01:11 -0500
Subject: [PATCH] solution: warn if WS is not configured for an upstream

---
 .../emeraldpay/dshackle/upstream/ethereum/EthereumUpstream.kt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstream.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstream.kt
index 89a20ad4..f2929b6a 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstream.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstream.kt
@@ -88,13 +88,15 @@ open class EthereumUpstream(
             val ws = EthereumWsHead(ethereumWs).apply {
                 this.start()
             }
-            val rpc = EthereumRpcHead(api, Duration.ofSeconds(20)).apply {
+            // receive bew blocks through Websockets, but periodically verify with RPC
+            val rpc = EthereumRpcHead(api, Duration.ofSeconds(30)).apply {
                 this.start()
             }
             EthereumHeadMerge(listOf(rpc.getFlux(), ws.getFlux())).apply {
                 this.start()
             }
         } else {
+            log.warn("Setting up upstream $id with RPC-only access, less effective than WS+RPC")
             EthereumRpcHead(api).apply {
                 this.start()
             }