diff --git a/src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfig.kt b/src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfig.kt
index f8cf5dd7..a3f88519 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfig.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfig.kt
@@ -116,8 +116,8 @@ open class UpstreamsConfig {
     }
 
     class EthereumPosConnection : UpstreamConnection() {
-        var execution : EthereumConnection? = null
-        var blockPriority : Int = 0
+        var execution: EthereumConnection? = null
+        var blockPriority: Int = 0
     }
 
     data class BitcoinZeroMq(
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfigReader.kt b/src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfigReader.kt
index 9ab5be40..71dd6704 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfigReader.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfigReader.kt
@@ -165,7 +165,7 @@ class UpstreamsConfigReader(
         return connection
     }
 
-    private fun readEthereumPosConnection(connConfigNode: MappingNode) : UpstreamsConfig.EthereumPosConnection {
+    private fun readEthereumPosConnection(connConfigNode: MappingNode): UpstreamsConfig.EthereumPosConnection {
         val connection = UpstreamsConfig.EthereumPosConnection()
         getMapping(connConfigNode, "execution")?.let {
             connection.execution = readEthereumConnection(it)
@@ -175,7 +175,7 @@ class UpstreamsConfigReader(
         }
         return connection
     }
-    private fun readEthereumConnection(connConfigNode : MappingNode) : UpstreamsConfig.EthereumConnection {
+    private fun readEthereumConnection(connConfigNode: MappingNode): UpstreamsConfig.EthereumConnection {
         val connection = UpstreamsConfig.EthereumConnection()
         getMapping(connConfigNode, "rpc")?.let { node ->
             getValueAsString(node, "url")?.let { url ->
@@ -211,7 +211,7 @@ class UpstreamsConfigReader(
         return connection
     }
 
-    private fun <T : UpstreamsConfig.UpstreamConnection>readUpstream(config: UpstreamsConfig, upNode: MappingNode, connFactory: () -> T) {
+    private fun <T : UpstreamsConfig.UpstreamConnection> readUpstream(config: UpstreamsConfig, upNode: MappingNode, connFactory: () -> T) {
         val upstream = UpstreamsConfig.Upstream<T>()
         readUpstreamCommon(upNode, upstream)
         readUpstreamStandard(upNode, upstream)
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/data/RingSet.kt b/src/main/kotlin/io/emeraldpay/dshackle/data/RingSet.kt
index a3e1815e..37b37af4 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/data/RingSet.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/data/RingSet.kt
@@ -4,7 +4,7 @@ import java.util.concurrent.atomic.AtomicReference
 
 class RingSet<T>(
     private val maxSize: Int
-): Set<T> {
+) : Set<T> {
     private var seqValues: AtomicReference<List<T>> = AtomicReference(emptyList())
     private var set: Set<T> = emptySet()
     override val size: Int
@@ -41,4 +41,4 @@ class RingSet<T>(
     override fun containsAll(elements: Collection<@UnsafeVariance T>): Boolean {
         return set.containsAll(elements)
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/rpc/NativeSubscribe.kt b/src/main/kotlin/io/emeraldpay/dshackle/rpc/NativeSubscribe.kt
index 6827735e..a2b7b3b2 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/rpc/NativeSubscribe.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/rpc/NativeSubscribe.kt
@@ -21,7 +21,6 @@ import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.SilentException
 import io.emeraldpay.dshackle.upstream.MultistreamHolder
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
-import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import io.emeraldpay.grpc.BlockchainType
 import io.emeraldpay.grpc.Chain
 import io.grpc.Status
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/startup/ConfiguredUpstreams.kt b/src/main/kotlin/io/emeraldpay/dshackle/startup/ConfiguredUpstreams.kt
index 0eba3a3b..994c42d1 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/startup/ConfiguredUpstreams.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/startup/ConfiguredUpstreams.kt
@@ -20,7 +20,11 @@ import io.emeraldpay.dshackle.FileResolver
 import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.reader.Reader
-import io.emeraldpay.dshackle.upstream.*
+import io.emeraldpay.dshackle.upstream.CurrentMultistreamHolder
+import io.emeraldpay.dshackle.upstream.Head
+import io.emeraldpay.dshackle.upstream.HttpRpcFactory
+import io.emeraldpay.dshackle.upstream.MergedHead
+import io.emeraldpay.dshackle.upstream.Upstream
 import io.emeraldpay.dshackle.upstream.bitcoin.BitcoinRpcHead
 import io.emeraldpay.dshackle.upstream.bitcoin.BitcoinRpcUpstream
 import io.emeraldpay.dshackle.upstream.bitcoin.BitcoinZMQHead
@@ -147,7 +151,7 @@ open class ConfiguredUpstreams(
         config: UpstreamsConfig.Upstream<UpstreamsConfig.EthereumPosConnection>,
         chain: Chain,
         options: UpstreamsConfig.Options
-    ) : Upstream? {
+    ): Upstream? {
         val conn = config.connection!!
         val execution = conn.execution
         if (execution == null) {
@@ -176,7 +180,7 @@ open class ConfiguredUpstreams(
         config: UpstreamsConfig.Upstream<UpstreamsConfig.BitcoinConnection>,
         chain: Chain,
         options: UpstreamsConfig.Options
-    ) : Upstream? {
+    ): Upstream? {
         val conn = config.connection!!
         val httpFactory = buildHttpFactory(conn)
         if (httpFactory == null) {
@@ -218,7 +222,7 @@ open class ConfiguredUpstreams(
         config: UpstreamsConfig.Upstream<UpstreamsConfig.EthereumConnection>,
         chain: Chain,
         options: UpstreamsConfig.Options
-    ) : EthereumRpcUpstream? {
+    ): EthereumRpcUpstream? {
         val conn = config.connection!!
 
         val urls = ArrayList<URI>()
@@ -291,7 +295,7 @@ open class ConfiguredUpstreams(
         }
     }
 
-    private fun buildEthereumConnectorFactory(conn: UpstreamsConfig.EthereumConnection, chain: Chain, urls: ArrayList<URI>, forkChoice: ForkChoice): EthereumConnectorFactory?  {
+    private fun buildEthereumConnectorFactory(conn: UpstreamsConfig.EthereumConnection, chain: Chain, urls: ArrayList<URI>, forkChoice: ForkChoice): EthereumConnectorFactory? {
         val wsFactoryApi = buildWsFactory(conn, urls)
         val httpFactory = buildHttpFactory(conn, urls)
         log.info("Using ${chain.chainName} upstream, at ${urls.joinToString()}")
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/AbstractHead.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/AbstractHead.kt
index ce4e7931..48ebfe63 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/AbstractHead.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/AbstractHead.kt
@@ -20,11 +20,9 @@ import io.emeraldpay.dshackle.upstream.forkchoice.ForkChoice
 import org.slf4j.LoggerFactory
 import reactor.core.Disposable
 import reactor.core.publisher.Flux
-import reactor.core.publisher.Mono
 import reactor.core.publisher.Sinks
 import reactor.core.scheduler.Schedulers
 import reactor.kotlin.core.publisher.toMono
-import java.util.concurrent.atomic.AtomicReference
 
 abstract class AbstractHead(
     private val forkChoice: ForkChoice
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/DistanceExtractor.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/DistanceExtractor.kt
index 77dc9b61..677d1e7f 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/DistanceExtractor.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/DistanceExtractor.kt
@@ -4,8 +4,8 @@ import io.emeraldpay.dshackle.data.BlockContainer
 
 class DistanceExtractor {
     sealed class ChainDistance {
-        data class Distance(val dist: Long): ChainDistance()
-        object Fork: ChainDistance()
+        data class Distance(val dist: Long) : ChainDistance()
+        object Fork : ChainDistance()
     }
 
     companion object {
@@ -25,4 +25,4 @@ class DistanceExtractor {
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/HttpFactory.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/HttpFactory.kt
index 10d99560..359476ed 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/HttpFactory.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/HttpFactory.kt
@@ -7,4 +7,4 @@ import io.emeraldpay.grpc.Chain
 
 interface HttpFactory {
     fun create(id: String?, chain: Chain): Reader<JsonRpcRequest, JsonRpcResponse>
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/HttpRpcFactory.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/HttpRpcFactory.kt
index 9261cc6c..adf0aafd 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/HttpRpcFactory.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/HttpRpcFactory.kt
@@ -42,4 +42,4 @@ open class HttpRpcFactory(
             tls
         )
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinMultistream.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinMultistream.kt
index 8a9054b7..3d8b0bba 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinMultistream.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinMultistream.kt
@@ -86,8 +86,8 @@ open class BitcoinMultistream(
             }
         } else {
             val newHead = MergedHead(upstreams.map { it.getHead() }, MostWorkForkChoice()).apply {
-                this.start()
-            }
+            this.start()
+        }
             val lagObserver = BitcoinHeadLagObserver(newHead, upstreams)
             this.lagObserver = lagObserver
             lagObserver.start()
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumRpcUpstream.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumRpcUpstream.kt
index e4b104cd..b071af41 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumRpcUpstream.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumRpcUpstream.kt
@@ -21,7 +21,9 @@ import io.emeraldpay.dshackle.cache.CachesEnabled
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.startup.QuorumForLabels
-import io.emeraldpay.dshackle.upstream.*
+import io.emeraldpay.dshackle.upstream.Head
+import io.emeraldpay.dshackle.upstream.Upstream
+import io.emeraldpay.dshackle.upstream.UpstreamAvailability
 import io.emeraldpay.dshackle.upstream.calls.CallMethods
 import io.emeraldpay.dshackle.upstream.ethereum.connectors.ConnectorFactory
 import io.emeraldpay.dshackle.upstream.ethereum.connectors.EthereumConnector
@@ -42,8 +44,8 @@ open class EthereumRpcUpstream(
     connectorFactory: ConnectorFactory
 ) : EthereumUpstream(id, options, role, targets, node), Lifecycle, Upstream, CachesEnabled {
     private val log = LoggerFactory.getLogger(EthereumRpcUpstream::class.java)
-    private val validator : EthereumUpstreamValidator = EthereumUpstreamValidator(this, getOptions())
-    private val connector : EthereumConnector = connectorFactory.create(this, validator, chain)
+    private val validator: EthereumUpstreamValidator = EthereumUpstreamValidator(this, getOptions())
+    private val connector: EthereumConnector = connectorFactory.create(this, validator, chain)
 
     private var validatorSubscription: Disposable? = null
 
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 0b50610e..c14bd120 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstream.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstream.kt
@@ -43,4 +43,4 @@ abstract class EthereumUpstream(
     override fun getLabels(): Collection<UpstreamsConfig.Labels> {
         return node?.let { listOf(it.labels) } ?: emptyList()
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstreamValidator.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstreamValidator.kt
index d8cbc7bd..d1fdc07c 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstreamValidator.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumUpstreamValidator.kt
@@ -22,7 +22,6 @@ import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.upstream.Upstream
 import io.emeraldpay.dshackle.upstream.UpstreamAvailability
-import io.emeraldpay.dshackle.upstream.ethereum.connectors.EthereumConnector
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcResponse
 import io.emeraldpay.etherjar.rpc.json.SyncingJson
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/ConnectorFactory.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/ConnectorFactory.kt
index 09c5f26d..0e0d21e5 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/ConnectorFactory.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/ConnectorFactory.kt
@@ -7,4 +7,4 @@ import io.emeraldpay.grpc.Chain
 interface ConnectorFactory {
     fun create(upstream: DefaultUpstream, validator: EthereumUpstreamValidator, chain: Chain): EthereumConnector
     fun isValid(): Boolean
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumConnector.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumConnector.kt
index dcd8f5b0..85ecf596 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumConnector.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumConnector.kt
@@ -10,4 +10,4 @@ interface EthereumConnector : Lifecycle {
     fun getHead(): Head
 
     fun getApi(): Reader<JsonRpcRequest, JsonRpcResponse>
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumConnectorFactory.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumConnectorFactory.kt
index 78f69556..2850ee10 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumConnectorFactory.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumConnectorFactory.kt
@@ -2,7 +2,6 @@ package io.emeraldpay.dshackle.upstream.ethereum.connectors
 
 import io.emeraldpay.dshackle.upstream.DefaultUpstream
 import io.emeraldpay.dshackle.upstream.HttpFactory
-import io.emeraldpay.dshackle.upstream.HttpRpcFactory
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumUpstreamValidator
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumWsFactory
 import io.emeraldpay.dshackle.upstream.forkchoice.ForkChoice
@@ -14,18 +13,18 @@ open class EthereumConnectorFactory(
     private val wsFactory: EthereumWsFactory?,
     private val httpFactory: HttpFactory?,
     private val forkChoice: ForkChoice
-): ConnectorFactory {
+) : ConnectorFactory {
     private val log = LoggerFactory.getLogger(EthereumConnectorFactory::class.java)
 
     override fun isValid(): Boolean {
         if (preferHttp && httpFactory == null) {
-            return false;
+            return false
         }
         return true
     }
 
     override fun create(upstream: DefaultUpstream, validator: EthereumUpstreamValidator, chain: Chain): EthereumConnector {
-        if (wsFactory!= null && !preferHttp) {
+        if (wsFactory != null && !preferHttp) {
             return EthereumWsConnector(wsFactory, upstream, validator, chain, forkChoice)
         }
         if (httpFactory == null) {
@@ -33,4 +32,4 @@ open class EthereumConnectorFactory(
         }
         return EthereumRpcConnector(httpFactory.create(upstream.getId(), chain), wsFactory, upstream.getId(), forkChoice)
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumRpcConnector.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumRpcConnector.kt
index 8ca9d135..03c541b1 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumRpcConnector.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumRpcConnector.kt
@@ -5,9 +5,11 @@ import io.emeraldpay.dshackle.cache.CachesEnabled
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.MergedHead
-import io.emeraldpay.dshackle.upstream.ethereum.*
+import io.emeraldpay.dshackle.upstream.ethereum.EthereumRpcHead
+import io.emeraldpay.dshackle.upstream.ethereum.EthereumWsFactory
+import io.emeraldpay.dshackle.upstream.ethereum.EthereumWsHead
+import io.emeraldpay.dshackle.upstream.ethereum.WsConnection
 import io.emeraldpay.dshackle.upstream.forkchoice.ForkChoice
-import io.emeraldpay.dshackle.upstream.forkchoice.MostWorkForkChoice
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcResponse
 import org.slf4j.LoggerFactory
@@ -15,13 +17,13 @@ import org.springframework.context.Lifecycle
 import java.time.Duration
 
 class EthereumRpcConnector(
-    private val directReader : Reader<JsonRpcRequest, JsonRpcResponse>,
+    private val directReader: Reader<JsonRpcRequest, JsonRpcResponse>,
     wsFactory: EthereumWsFactory?,
-    id : String,
+    id: String,
     forkChoice: ForkChoice
 ) : EthereumConnector, CachesEnabled {
-    private val conn : WsConnection?
-    private val head : Head
+    private val conn: WsConnection?
+    private val head: Head
 
     companion object {
         private val log = LoggerFactory.getLogger(EthereumRpcConnector::class.java)
@@ -76,4 +78,4 @@ class EthereumRpcConnector(
     override fun getHead(): Head {
         return head
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumWsConnector.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumWsConnector.kt
index 46bd437b..c4844dda 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumWsConnector.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/connectors/EthereumWsConnector.kt
@@ -58,7 +58,7 @@ class EthereumWsConnector(
     }
 
     override fun isRunning(): Boolean {
-       return head.isRunning
+        return head.isRunning
     }
 
     override fun stop() {
@@ -73,4 +73,4 @@ class EthereumWsConnector(
     override fun getHead(): Head {
         return head
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectBlockUpdates.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectBlockUpdates.kt
index 252276a7..0a424faf 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectBlockUpdates.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectBlockUpdates.kt
@@ -20,7 +20,6 @@ import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxId
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
-import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import org.slf4j.LoggerFactory
 import reactor.core.publisher.Flux
 import reactor.core.scheduler.Schedulers
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectLogs.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectLogs.kt
index ce99e941..9482a10f 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectLogs.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectLogs.kt
@@ -16,7 +16,6 @@
 package io.emeraldpay.dshackle.upstream.ethereum.subscribe
 
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
-import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import io.emeraldpay.dshackle.upstream.ethereum.subscribe.json.LogMessage
 import io.emeraldpay.etherjar.domain.Address
 import io.emeraldpay.etherjar.hex.Hex32
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectNewHeads.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectNewHeads.kt
index f5d1b052..c3b7bb4a 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectNewHeads.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectNewHeads.kt
@@ -16,7 +16,6 @@
 package io.emeraldpay.dshackle.upstream.ethereum.subscribe
 
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
-import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import io.emeraldpay.dshackle.upstream.ethereum.subscribe.json.NewHeadMessage
 import org.slf4j.LoggerFactory
 import reactor.core.publisher.Flux
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectSyncing.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectSyncing.kt
index fc0d7285..d65af1e7 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectSyncing.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectSyncing.kt
@@ -17,7 +17,6 @@ package io.emeraldpay.dshackle.upstream.ethereum.subscribe
 
 import io.emeraldpay.dshackle.upstream.UpstreamAvailability
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
-import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import org.slf4j.LoggerFactory
 import reactor.core.publisher.Flux
 import java.time.Duration
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ProduceLogs.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ProduceLogs.kt
index 374193e0..44da804d 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ProduceLogs.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ProduceLogs.kt
@@ -21,7 +21,6 @@ import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxId
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
-import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import io.emeraldpay.dshackle.upstream.ethereum.subscribe.json.LogMessage
 import io.emeraldpay.etherjar.hex.HexData
 import io.emeraldpay.etherjar.rpc.json.TransactionReceiptJson
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosRpcUpstream.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosRpcUpstream.kt
index 7838c08e..7cd6cca6 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosRpcUpstream.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosRpcUpstream.kt
@@ -21,7 +21,9 @@ import io.emeraldpay.dshackle.cache.CachesEnabled
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.startup.QuorumForLabels
-import io.emeraldpay.dshackle.upstream.*
+import io.emeraldpay.dshackle.upstream.Head
+import io.emeraldpay.dshackle.upstream.Upstream
+import io.emeraldpay.dshackle.upstream.UpstreamAvailability
 import io.emeraldpay.dshackle.upstream.calls.CallMethods
 import io.emeraldpay.dshackle.upstream.ethereum.connectors.ConnectorFactory
 import io.emeraldpay.dshackle.upstream.ethereum.connectors.EthereumConnector
@@ -42,8 +44,8 @@ open class EthereumPosRpcUpstream(
     connectorFactory: ConnectorFactory
 ) : EthereumPosUpstream(id, options, role, targets, node), Lifecycle, Upstream, CachesEnabled {
     private val log = LoggerFactory.getLogger(EthereumPosRpcUpstream::class.java)
-    private val validator : EthereumUpstreamValidator = EthereumUpstreamValidator(this, getOptions())
-    private val connector : EthereumConnector = connectorFactory.create(this, validator, chain)
+    private val validator: EthereumUpstreamValidator = EthereumUpstreamValidator(this, getOptions())
+    private val connector: EthereumConnector = connectorFactory.create(this, validator, chain)
 
     private var validatorSubscription: Disposable? = null
 
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosUpstream.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosUpstream.kt
index f98aa936..4ce8253a 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosUpstream.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosUpstream.kt
@@ -43,4 +43,4 @@ abstract class EthereumPosUpstream(
     override fun getLabels(): Collection<UpstreamsConfig.Labels> {
         return node?.let { listOf(it.labels) } ?: emptyList()
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/ForkChoice.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/ForkChoice.kt
index aa664241..2db6006a 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/ForkChoice.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/ForkChoice.kt
@@ -5,8 +5,8 @@ import io.emeraldpay.dshackle.data.BlockContainer
 interface ForkChoice {
 
     sealed class ChoiceResult {
-        data class Updated(val nwhead: BlockContainer): ChoiceResult()
-        data class Same(val head: BlockContainer?): ChoiceResult()
+        data class Updated(val nwhead: BlockContainer) : ChoiceResult()
+        data class Same(val head: BlockContainer?) : ChoiceResult()
     }
 
     fun getHead(): BlockContainer?
@@ -14,4 +14,4 @@ interface ForkChoice {
     fun filter(block: BlockContainer): Boolean
 
     fun choose(block: BlockContainer): ChoiceResult
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/MostWorkForkChoice.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/MostWorkForkChoice.kt
index d4c5e9c0..cc276b45 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/MostWorkForkChoice.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/MostWorkForkChoice.kt
@@ -6,7 +6,7 @@ import java.util.concurrent.atomic.AtomicReference
 class MostWorkForkChoice : ForkChoice {
     private val head = AtomicReference<BlockContainer>(null)
 
-    override fun getHead() : BlockContainer? {
+    override fun getHead(): BlockContainer? {
         return head.get()
     }
 
@@ -28,5 +28,4 @@ class MostWorkForkChoice : ForkChoice {
         }
         return ForkChoice.ChoiceResult.Same(nwhead)
     }
-
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/NoChoiceWithPriorityForkChoice.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/NoChoiceWithPriorityForkChoice.kt
index 523f4547..177ae220 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/NoChoiceWithPriorityForkChoice.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/NoChoiceWithPriorityForkChoice.kt
@@ -7,7 +7,7 @@ import java.util.concurrent.atomic.AtomicReference
 
 class NoChoiceWithPriorityForkChoice(
     private val nodeRating: Int
-): ForkChoice {
+) : ForkChoice {
     private val head = AtomicReference<BlockContainer>(null)
     private val seenBlocks = RingSet<BlockId>(10)
 
@@ -33,4 +33,4 @@ class NoChoiceWithPriorityForkChoice(
         }
         return ForkChoice.ChoiceResult.Same(nwhead)
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/PriorityForkChoice.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/PriorityForkChoice.kt
index e9ec338b..50685b3a 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/PriorityForkChoice.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/forkchoice/PriorityForkChoice.kt
@@ -5,7 +5,7 @@ import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.RingSet
 import java.util.concurrent.atomic.AtomicReference
 
-class PriorityForkChoice: ForkChoice {
+class PriorityForkChoice : ForkChoice {
     private val head = AtomicReference<BlockContainer>(null)
     private val seenBlocks = RingSet<BlockId>(10)
 
@@ -32,4 +32,4 @@ class PriorityForkChoice: ForkChoice {
         }
         return ForkChoice.ChoiceResult.Same(nwhead)
     }
-}
\ No newline at end of file
+}