problem: WS connection still breaks with very large frames

solution: increase default limit and make it configurable

src/test/groovy/io/emeraldpay/dshackle/config/UpstreamsConfigReaderSpec.groovy

@@ -99,6 +99,32 @@ class UpstreamsConfigReaderSpec extends Specification {
         }
     }
 
+    def "Parse full defined websocket config"() {
+        setup:
+        def config = this.class.getClassLoader().getResourceAsStream("upstreams-ws-full.yaml")
+        when:
+        def act = reader.read(config)
+        then:
+        act != null
+        act.upstreams.size() == 1
+        with(act.upstreams.get(0)) {
+            id == "local"
+            chain == "ethereum"
+            connection instanceof UpstreamsConfig.EthereumConnection
+            with((UpstreamsConfig.EthereumConnection) connection) {
+                rpc == null
+                ws != null
+                ws.url == new URI("ws://localhost:8546")
+                ws.basicAuth != null
+                with(ws.basicAuth) {
+                    username == "9c199ad8f281f20154fc258fe41a6814"
+                    password == "258fe4149c199ad8f2811a68f20154fc"
+                }
+                ws.frameSize == 10 * 1024 * 1024
+                ws.msgSize == 25 * 1024 * 1024
+            }
+        }
+    }
 
     def "Parse bitcoin upstreams"() {
         setup:

src/test/groovy/io/emeraldpay/dshackle/config/YamlConfigReaderSpec.groovy

@@ -0,0 +1,45 @@
+/**
+ * Copyright (c) 2021 EmeraldPay, Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.emeraldpay.dshackle.config
+
+import org.yaml.snakeyaml.Yaml
+import org.yaml.snakeyaml.nodes.MappingNode
+import spock.lang.Specification
+
+class YamlConfigReaderSpec extends Specification {
+
+    def "reads bytes values"() {
+        setup:
+        def rdr = new Impl()
+        expect:
+        rdr.getValueAsBytes(asNode("test", input), "test") == exp
+        where:
+        input  | exp
+        "1024" | 1024
+        "1k"   | 1024
+        "1kb"  | 1024
+        "1K"   | 1024
+        "16kb" | 16 * 1024
+        "1M"   | 1024 * 1024
+        "4mb"  | 4 * 1024 * 1024
+    }
+
+    private MappingNode asNode(String key, String value) {
+        return new Yaml().compose(new StringReader("$key: $value")) as MappingNode
+    }
+
+    class Impl extends YamlConfigReader {}
+}

src/test/resources/upstreams-ws-full.yaml

@@ -0,0 +1,15 @@
+version: v1
+
+upstreams:
+  - id: local
+    chain: ethereum
+    connection:
+      ethereum:
+        ws:
+          url: "ws://localhost:8546"
+          origin: "http://localhost"
+          frameSize: 10Mb
+          msgSize: 25Mb
+          basic-auth:
+            username: 9c199ad8f281f20154fc258fe41a6814
+            password: 258fe4149c199ad8f2811a68f20154fc