set gRPC message size limit 32M

src/main/kotlin/io/emeraldpay/dshackle/Defaults.kt

@@ -21,6 +21,7 @@ import java.time.Duration
 class Defaults {
 
     companion object {
+        const val maxMessageSize: Int = 32 * 1024 * 1024
         val timeout: Duration = Duration.ofSeconds(60)
         val timeoutInternal: Duration = timeout.dividedBy(4)
         val retryConnection: Duration = Duration.ofSeconds(10)

src/main/kotlin/io/emeraldpay/dshackle/GrpcServer.kt

@@ -46,7 +46,7 @@ open class GrpcServer(
         log.info("Listening Native gRPC on ${mainConfig.host}:${mainConfig.port}")
         val serverBuilder = NettyServerBuilder
             .forAddress(InetSocketAddress(mainConfig.host, mainConfig.port))
-            .maxInboundMessageSize(Int.MAX_VALUE)
+            .maxInboundMessageSize(Defaults.maxMessageSize)
             .let {
                 if (mainConfig.accessLogConfig.enabled) {
                     it.intercept(accessHandler)

src/main/kotlin/io/emeraldpay/dshackle/upstream/grpc/GrpcUpstreams.kt

@@ -71,7 +71,7 @@ class GrpcUpstreams(
     fun start(): Flux<UpstreamChangeEvent> {
         val chanelBuilder = NettyChannelBuilder.forAddress(host, port)
             // some messages are very large. many of them in megabytes, some even in gigabytes (ex. ETH Traces)
-            .maxInboundMessageSize(Int.MAX_VALUE)
+            .maxInboundMessageSize(Defaults.maxMessageSize)
             .enableRetry()
             .maxRetryAttempts(3)
         if (auth != null && StringUtils.isNotEmpty(auth.ca)) {