From dab115c9b27a14e516ac522338436b607cf2e59f Mon Sep 17 00:00:00 2001
From: Igor Artamonov <igor@artamonov.ru>
Date: Wed, 3 Jul 2019 23:02:19 -0400
Subject: [PATCH] problem: OutOfBound array access

---
 .../emeraldpay/dshackle/upstream/ChainConnect.kt   | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ChainConnect.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ChainConnect.kt
index 91d3915b..0434e72a 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ChainConnect.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ChainConnect.kt
@@ -48,10 +48,10 @@ class ChainConnect(
     }
 
     class SingleApi(
-            val quorumApi: QuorumApi
+            private val quorumApi: QuorumApi
     ): Iterator<EthereumApi> {
 
-        var consumed = false
+        private var consumed = false
 
         override fun hasNext(): Boolean {
             return !consumed && quorumApi.hasNext()
@@ -64,12 +64,12 @@ class ChainConnect(
     }
 
     class QuorumApi(
-            val apis: List<Upstream>,
-            val quorum: Int,
-            var pos: Int
+            private val apis: List<Upstream>,
+            private val quorum: Int,
+            private var pos: Int
     ): Iterator<EthereumApi> {
 
-        var consumed = 0
+        private var consumed = 0
 
         override fun hasNext(): Boolean {
             return consumed < quorum
@@ -78,7 +78,7 @@ class ChainConnect(
         override fun next(): EthereumApi {
             val start = pos
             while (pos < start + apis.size) {
-                val api = apis[pos++]
+                val api = apis[pos++ % apis.size]
                 if (api.isAvailable()) {
                     consumed++
                     return api.api