Revert "Revert "Native subscribe filter""

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "emerald-java-client"]
 	path = emerald-java-client
-	url = git@github.com:p2p-org/emerald-java-client.git
+	url = https://github.com/p2p-org/emerald-java-client.git
 [submodule "dshackle-cli/grpc"]
 	path = dshackle-cli/grpc
-	url = https://github.com/emeraldpay/emerald-grpc.git
+	url = https://github.com/p2p-org/emerald-grpc.git

gradle/libs.versions.toml

@@ -31,7 +31,7 @@ cglib-nodep = "cglib:cglib-nodep:3.3.0"
 
 detekt-formatting = { module = "io.gitlab.arturbosch.detekt:detekt-formatting", version.ref = "detekt" }
 
-emerald-api = "io.emeraldpay:emerald-api:0.12-alpha.1"
+emerald-api = "io.emeraldpay:emerald-api:0.12-alpha.3"
 
 equals-verifier = "nl.jqno.equalsverifier:equalsverifier:3.3"
 
@@ -85,6 +85,7 @@ netty-codec-http2 = { module = "io.netty:netty-codec-http2", version.ref = "nett
 netty-buffer = { module = "io.netty:netty-buffer", version.ref = "netty" }
 netty-tcnative-core = { module = "io.netty:netty-tcnative", version.ref = "netty-tcnative" }
 netty-tcnative-boringssl = { module = "io.netty:netty-tcnative-boringssl-static", version.ref = "netty-tcnative" }
+netty-macos = "io.netty:netty-resolver-dns-native-macos:4.1.72.Final"
 
 zeromq = "org.zeromq:jeromq:0.5.2"
 

settings.gradle

@@ -3,6 +3,6 @@ enableFeaturePreview("TYPESAFE_PROJECT_ACCESSORS")
 
 includeBuild('./emerald-java-client') {
     dependencySubstitution {
-        substitute module('io.emeraldpay:emerald-api:0.12-alpha.1') using project(':')
+        substitute module('io.emeraldpay:emerald-api:0.12-alpha.3') using project(':')
     }
 }

src/main/kotlin/io/emeraldpay/dshackle/proxy/WebsocketHandler.kt

@@ -17,6 +17,7 @@ package io.emeraldpay.dshackle.proxy
 
 import com.google.protobuf.ByteString
 import io.emeraldpay.api.proto.BlockchainOuterClass
+import io.emeraldpay.api.proto.BlockchainOuterClass.Selector
 import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.config.ProxyConfig
 import io.emeraldpay.dshackle.monitoring.accesslog.AccessHandlerHttp
@@ -139,7 +140,7 @@ class WebsocketHandler(
                     }
                     // produce actual responses
                     val responses = nativeSubscribe
-                        .subscribe(blockchain, methodParams.first, methodParams.second)
+                        .subscribe(blockchain, methodParams.first, methodParams.second, io.emeraldpay.dshackle.upstream.Selector.empty)
                         .map { event ->
                             WsSubscriptionResponse(params = WsSubscriptionData(event, subscriptionId))
                         }

src/main/kotlin/io/emeraldpay/dshackle/rpc/NativeSubscribe.kt

@@ -20,6 +20,7 @@ import io.emeraldpay.api.proto.BlockchainOuterClass
 import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.SilentException
 import io.emeraldpay.dshackle.upstream.MultistreamHolder
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
 import io.emeraldpay.grpc.BlockchainType
 import io.emeraldpay.grpc.Chain
@@ -50,20 +51,17 @@ open class NativeSubscribe(
             .onErrorMap(this@NativeSubscribe::convertToStatus)
     }
 
-    fun start(it: BlockchainOuterClass.NativeSubscribeRequest): Publisher<out Any> {
+    fun start(request: BlockchainOuterClass.NativeSubscribeRequest): Publisher<out Any> {
-        val chain = Chain.byId(it.chainValue)
+        val chain = Chain.byId(request.chainValue)
         if (BlockchainType.from(chain) != BlockchainType.ETHEREUM_POS && BlockchainType.from(chain) != BlockchainType.ETHEREUM) {
             return Mono.error(UnsupportedOperationException("Native subscribe is not supported for ${chain.chainCode}"))
         }
-        val method = it.method
+        val method = request.method
-        val params: Any? = it.payload?.let { payload ->
+        val params: Any? = request.payload?.takeIf { !it.isEmpty }?.let {
-            if (payload.size() > 0) {
+            objectMapper.readValue(it.newInput(), Map::class.java)
-                objectMapper.readValue(payload.newInput(), Map::class.java)
-            } else {
-                null
-            }
         }
-        return subscribe(chain, method, params)
+        val matcher = Selector.convertToMatcher(request.selector)
+        return subscribe(chain, method, params, matcher)
     }
 
     fun convertToStatus(t: Throwable) = when (t) {
@@ -81,11 +79,11 @@ open class NativeSubscribe(
         }
     }
 
-    open fun subscribe(chain: Chain, method: String, params: Any?): Flux<out Any> {
+    open fun subscribe(chain: Chain, method: String, params: Any?, matcher: Selector.Matcher): Flux<out Any> {
         val up = multistreamHolder.getUpstream(chain) ?: return Flux.error(SilentException.UnsupportedBlockchain(chain))
         return (up as EthereumLikeMultistream)
             .getSubscribe()
-            .subscribe(method, params)
+            .subscribe(method, params, matcher)
     }
 
     fun convertToProto(value: Any): BlockchainOuterClass.NativeSubscribeReplyItem {

src/main/kotlin/io/emeraldpay/dshackle/rpc/TrackERC20Address.kt

@@ -20,6 +20,7 @@ import io.emeraldpay.api.proto.Common
 import io.emeraldpay.dshackle.SilentException
 import io.emeraldpay.dshackle.config.TokensConfig
 import io.emeraldpay.dshackle.upstream.MultistreamHolder
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.ERC20Balance
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumPosMultiStream
 import io.emeraldpay.etherjar.domain.Address
@@ -90,7 +91,8 @@ class TrackERC20Address(
             .getSubscribe().logs
             .start(
                 listOf(tokenDefinition.token.contract),
-                listOf(EventId.fromSignature("Transfer", "address", "address", "uint256"))
+                listOf(EventId.fromSignature("Transfer", "address", "address", "uint256")),
+                Selector.empty
             )
 
         return ethereumAddresses.extract(request.address)

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumLikeMultistream.kt

@@ -1,8 +1,12 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
+import io.emeraldpay.dshackle.upstream.Head
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.Upstream
 
 interface EthereumLikeMultistream : Upstream {
     fun getReader(): EthereumReader
     fun getSubscribe(): EthereumSubscribe
+
+    fun getHead(mather: Selector.Matcher): Head
 }

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumMultistream.kt

@@ -20,6 +20,7 @@ import io.emeraldpay.dshackle.cache.Caches
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.upstream.ChainFees
+import io.emeraldpay.dshackle.upstream.EmptyHead
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.MergedHead
 import io.emeraldpay.dshackle.upstream.Multistream
@@ -31,6 +32,7 @@ import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcResponse
 import io.emeraldpay.grpc.Chain
 import org.slf4j.LoggerFactory
 import org.springframework.context.Lifecycle
+import org.springframework.util.ConcurrentReferenceHashMap
 import reactor.core.publisher.Mono
 
 @Suppress("UNCHECKED_CAST")
@@ -45,6 +47,8 @@ open class EthereumMultistream(
     }
 
     private var head: Head? = null
+    private val filteredHeads: MutableMap<String, Head> =
+        ConcurrentReferenceHashMap(16, ConcurrentReferenceHashMap.ReferenceType.WEAK)
 
     private val reader: EthereumReader = EthereumReader(this, this.caches, getMethodsFactory())
     private val subscribe = EthereumSubscribe(this)
@@ -74,6 +78,7 @@ open class EthereumMultistream(
     override fun stop() {
         super.stop()
         reader.stop()
+        filteredHeads.clear()
     }
 
     override fun isRunning(): Boolean {
@@ -118,6 +123,7 @@ open class EthereumMultistream(
             lagObserver.start()
             newHead
         }
+        filteredHeads[Selector.AnyLabelMatcher().describeInternal()] = head
         onHeadUpdated(head)
         return head
     }
@@ -142,6 +148,24 @@ open class EthereumMultistream(
         return subscribe
     }
 
+    override fun getHead(mather: Selector.Matcher): Head =
+        filteredHeads.computeIfAbsent(mather.describeInternal().intern()) { _ ->
+            upstreams.filter { mather.matches(it) }
+                .apply {
+                    log.debug("Found $size upstreams matching [${mather.describeInternal()}]")
+                }
+                .map { it.getHead() }
+                .let {
+                    when (it.size) {
+                        0 -> EmptyHead()
+                        1 -> it.first()
+                        else -> MergedHead(it, MostWorkForkChoice()).apply {
+                            start()
+                        }
+                    }
+                }
+        }
+
     override fun getFeeEstimation(): ChainFees {
         return feeEstimation
     }

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/EthereumSubscribe.kt

@@ -1,5 +1,6 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.subscribe.ConnectLogs
 import io.emeraldpay.dshackle.upstream.ethereum.subscribe.ConnectNewHeads
 import io.emeraldpay.dshackle.upstream.ethereum.subscribe.ConnectSyncing
@@ -21,9 +22,9 @@ open class EthereumSubscribe(
     private val syncing = ConnectSyncing(upstream)
 
     @Suppress("UNCHECKED_CAST")
-    open fun subscribe(method: String, params: Any?): Flux<out Any> {
+    open fun subscribe(method: String, params: Any?, matcher: Selector.Matcher): Flux<out Any> {
         if (method == "newHeads") {
-            return newHeads.connect()
+            return newHeads.connect(matcher)
         }
         if (method == "logs") {
             val paramsMap = try {
@@ -35,7 +36,7 @@ open class EthereumSubscribe(
             } catch (t: Throwable) {
                 return Flux.error(UnsupportedOperationException("Invalid parameter for $method. Error: ${t.message}"))
             }
-            return logs.start(paramsMap.address, paramsMap.topics)
+            return logs.start(paramsMap.address, paramsMap.topics, matcher)
         }
         if (method == "syncing") {
             return syncing.connect()

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectBlockUpdates.kt

@@ -19,16 +19,16 @@ import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxId
 import io.emeraldpay.dshackle.upstream.Head
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
 import org.slf4j.LoggerFactory
 import reactor.core.publisher.Flux
 import reactor.core.scheduler.Schedulers
 import java.time.Duration
 import java.util.LinkedList
-import java.util.concurrent.locks.ReentrantLock
+import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.locks.ReentrantReadWriteLock
 import kotlin.concurrent.read
-import kotlin.concurrent.withLock
 import kotlin.concurrent.write
 
 class ConnectBlockUpdates(
@@ -46,30 +46,19 @@ class ConnectBlockUpdates(
      */
     private val history = LinkedList<BlockContainer>()
     private val historyUpdateLock = ReentrantReadWriteLock()
+    private val connected: MutableMap<String, Flux<Update>> = ConcurrentHashMap()
 
-    private var connected: Flux<Update>? = null
+    fun connect() = connect(Selector.empty)
-    private val connectLock = ReentrantLock()
+    fun connect(matcher: Selector.Matcher): Flux<Update> {
-
+        return connected.computeIfAbsent(matcher.describeInternal()) { key ->
-    fun connect(): Flux<Update> {
+            extract(upstream.getHead(matcher))
-        val current = connected
-        if (current != null) {
-            return current
-        }
-        connectLock.withLock {
-            val currentRecheck = connected
-            if (currentRecheck != null) {
-                return currentRecheck
-            }
-            val created = extract(upstream.getHead())
                 .publishOn(Schedulers.boundedElastic())
                 .publish()
                 .refCount(1, Duration.ofSeconds(60))
                 .doFinally {
                     // forget it on disconnect, so next time it's recreated
-                    connected = null
+                    connected.remove(key)
                 }
-            connected = created
-            return created
         }
     }
 

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectLogs.kt

@@ -15,6 +15,7 @@
  */
 package io.emeraldpay.dshackle.upstream.ethereum.subscribe
 
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
 import io.emeraldpay.dshackle.upstream.ethereum.subscribe.json.LogMessage
 import io.emeraldpay.etherjar.domain.Address
@@ -40,17 +41,17 @@ open class ConnectLogs(
 
     private val produceLogs = ProduceLogs(upstream)
 
-    fun start(): Flux<LogMessage> {
+    fun start(matcher: Selector.Matcher): Flux<LogMessage> {
-        return produceLogs.produce(connectBlockUpdates.connect())
+        return produceLogs.produce(connectBlockUpdates.connect(matcher))
     }
 
-    open fun start(addresses: List<Address>, topics: List<Hex32>): Flux<LogMessage> {
+    open fun start(addresses: List<Address>, topics: List<Hex32>, matcher: Selector.Matcher): Flux<LogMessage> {
         // shortcut to the whole output if we don't have any filters
         if (addresses.isEmpty() && topics.isEmpty()) {
-            return start()
+            return start(matcher)
         }
         // filtered output
-        return start()
+        return start(matcher)
             .transform(filtered(addresses, topics))
     }
 

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectNewHeads.kt

@@ -15,14 +15,14 @@
  */
 package io.emeraldpay.dshackle.upstream.ethereum.subscribe
 
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumLikeMultistream
 import io.emeraldpay.dshackle.upstream.ethereum.subscribe.json.NewHeadMessage
 import org.slf4j.LoggerFactory
 import reactor.core.publisher.Flux
 import reactor.core.scheduler.Schedulers
 import java.time.Duration
-import java.util.concurrent.locks.ReentrantLock
+import java.util.concurrent.ConcurrentHashMap
-import kotlin.concurrent.withLock
 
 /**
  * Connects/reconnects to the upstream to produce NewHeads messages
@@ -35,30 +35,18 @@ class ConnectNewHeads(
         private val log = LoggerFactory.getLogger(ConnectNewHeads::class.java)
     }
 
-    private var connected: Flux<NewHeadMessage>? = null
+    private val connected: MutableMap<String, Flux<NewHeadMessage>> = ConcurrentHashMap()
-    private val connectLock = ReentrantLock()
 
-    fun connect(): Flux<NewHeadMessage> {
+    fun connect(matcher: Selector.Matcher): Flux<NewHeadMessage> =
-        val current = connected
+        connected.computeIfAbsent(matcher.describeInternal()) { key ->
-        if (current != null) {
+            ProduceNewHeads(upstream.getHead(matcher))
-            return current
-        }
-        connectLock.withLock {
-            val currentRecheck = connected
-            if (currentRecheck != null) {
-                return currentRecheck
-            }
-            val created = ProduceNewHeads(upstream.getHead())
                 .start()
                 .publishOn(Schedulers.boundedElastic())
                 .publish()
                 .refCount(1, Duration.ofSeconds(60))
                 .doFinally {
                     // forget it on disconnect, so next time it's recreated
-                    connected = null
+                    connected.remove(key)
                 }
-            connected = created
-            return created
         }
-    }
 }

src/main/kotlin/io/emeraldpay/dshackle/upstream/ethereum_pos/EthereumPosMultiStream.kt

@@ -20,6 +20,7 @@ import io.emeraldpay.dshackle.cache.Caches
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.upstream.ChainFees
+import io.emeraldpay.dshackle.upstream.EmptyHead
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.MergedHead
 import io.emeraldpay.dshackle.upstream.Multistream
@@ -31,6 +32,7 @@ import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcResponse
 import io.emeraldpay.grpc.Chain
 import org.slf4j.LoggerFactory
 import org.springframework.context.Lifecycle
+import org.springframework.util.ConcurrentReferenceHashMap
 import reactor.core.publisher.Mono
 
 @Suppress("UNCHECKED_CAST")
@@ -49,6 +51,8 @@ open class EthereumPosMultiStream(
     private val reader: EthereumReader = EthereumReader(this, this.caches, getMethodsFactory())
     private val feeEstimation = EthereumPriorityFees(this, reader, 256)
     private val subscribe = EthereumSubscribe(this)
+    private val filteredHeads: MutableMap<String, Head> =
+        ConcurrentReferenceHashMap(16, ConcurrentReferenceHashMap.ReferenceType.WEAK)
 
     init {
         this.init()
@@ -69,6 +73,7 @@ open class EthereumPosMultiStream(
     override fun stop() {
         super.stop()
         reader.stop()
+        filteredHeads.clear()
     }
 
     override fun isRunning(): Boolean {
@@ -137,6 +142,24 @@ open class EthereumPosMultiStream(
         return subscribe
     }
 
+    override fun getHead(mather: Selector.Matcher): Head =
+        filteredHeads.computeIfAbsent(mather.describeInternal().intern()) { _ ->
+            upstreams.filter { mather.matches(it) }
+                .apply {
+                    log.debug("Found $size upstreams matching [${mather.describeInternal()}]")
+                }
+                .map { it.getHead() }
+                .let {
+                    when (it.size) {
+                        0 -> EmptyHead()
+                        1 -> it.first()
+                        else -> MergedHead(it, PriorityForkChoice()).apply {
+                            start()
+                        }
+                    }
+                }
+        }
+
     override fun getFeeEstimation(): ChainFees {
         return feeEstimation
     }

src/test/groovy/io/emeraldpay/dshackle/proxy/WebsocketHandlerSpec.groovy

@@ -18,6 +18,7 @@ package io.emeraldpay.dshackle.proxy
 import io.emeraldpay.dshackle.monitoring.accesslog.AccessHandlerHttp
 import io.emeraldpay.dshackle.rpc.NativeCall
 import io.emeraldpay.dshackle.rpc.NativeSubscribe
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.etherjar.rpc.json.RequestJson
 import io.emeraldpay.grpc.Chain
 import io.micrometer.core.instrument.Counter
@@ -108,7 +109,7 @@ class WebsocketHandlerSpec extends Specification {
         def response2 = [foo: 2]
 
         def nativeSubscribe = Mock(NativeSubscribe) {
-            1 * it.subscribe(Chain.ETHEREUM, "foo_test", null) >> Flux.fromIterable([response1, response2])
+            1 * it.subscribe(Chain.ETHEREUM, "foo_test", null, Selector.empty) >> Flux.fromIterable([response1, response2])
         }
         def handler = new WebsocketHandler(
                 new ReadRpcJson(), new WriteRpcJson(), Stub(NativeCall), nativeSubscribe, requestHandlerFactory, Stub(ProxyServer.RequestMetricsFactory)

src/test/groovy/io/emeraldpay/dshackle/rpc/NativeSubscribeSpec.groovy

@@ -18,6 +18,7 @@ package io.emeraldpay.dshackle.rpc
 import com.google.protobuf.ByteString
 import io.emeraldpay.api.proto.BlockchainOuterClass
 import io.emeraldpay.dshackle.test.MultistreamHolderMock
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumPosMultiStream
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumSubscribe
@@ -33,7 +34,7 @@ class NativeSubscribeSpec extends Specification {
     def "Call with empty params when not provided"() {
         setup:
         def subscribe = Mock(EthereumSubscribe) {
-            1 * it.subscribe("newHeads", null) >> Flux.just("{}")
+            1 * it.subscribe("newHeads", null, _ as Selector.AnyLabelMatcher) >> Flux.just("{}")
         }
         def up = Mock(EthereumPosMultiStream) {
             1 * it.getSubscribe() >> subscribe
@@ -65,7 +66,7 @@ class NativeSubscribeSpec extends Specification {
                         params["topics"][0] == "0x7fcf532c15f0a6db0bd6d0e038bea71d30d808c7d98cb3bf7268a95bf5081b65"
                 println("ok: $ok")
                 ok
-            }) >> Flux.just("{}")
+            }, _ as Selector.AnyLabelMatcher) >> Flux.just("{}")
         }
         def up = Mock(EthereumPosMultiStream) {
             1 * it.getSubscribe() >> subscribe

src/test/groovy/io/emeraldpay/dshackle/rpc/TrackERC20AddressSpec.groovy

@@ -4,6 +4,7 @@ import io.emeraldpay.api.proto.BlockchainOuterClass
 import io.emeraldpay.api.proto.Common
 import io.emeraldpay.dshackle.config.TokensConfig
 import io.emeraldpay.dshackle.upstream.MultistreamHolder
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.ERC20Balance
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumPosMultiStream
@@ -170,7 +171,8 @@ class TrackERC20AddressSpec extends Specification {
         def logs = Mock(ConnectLogs) {
             1 * start(
                     [Address.from("0x54EedeAC495271d0F6B175474E89094C44Da98b9")],
-                    [Hex32.from("0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef")]
+                    [Hex32.from("0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef")],
+                    Selector.empty
             ) >> { args ->
                 println("ConnectLogs.start $args")
                 Flux.fromIterable(events)

src/test/groovy/io/emeraldpay/dshackle/test/MultistreamHolderMock.groovy

@@ -20,6 +20,7 @@ package io.emeraldpay.dshackle.test
 import io.emeraldpay.dshackle.cache.Caches
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.Multistream
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.bitcoin.BitcoinMultistream
 import io.emeraldpay.dshackle.upstream.bitcoin.BitcoinRpcUpstream
 import io.emeraldpay.dshackle.upstream.calls.CallMethods
@@ -142,6 +143,14 @@ class MultistreamHolderMock implements MultistreamHolder {
             }
             return super.getHead()
         }
+
+        @Override
+        Head getHead(@NotNull Selector.Matcher mather) {
+            if (customHead != null) {
+                return customHead
+            }
+            return super.getHead(mather)
+        }
     }
 
 }

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectBlockUpdatesSpec.groovy

@@ -19,6 +19,7 @@ import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxId
 import io.emeraldpay.dshackle.upstream.Head
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import io.emeraldpay.etherjar.domain.BlockHash
 import io.emeraldpay.etherjar.domain.TransactionId
@@ -223,7 +224,7 @@ class ConnectBlockUpdatesSpec extends Specification {
             1 * getFlux() >> Flux.never()
         }
         def up = Mock(EthereumMultistream) {
-            1 * getHead() >> head
+            1 * getHead(Selector.empty) >> head
         }
         def connectBlockUpdates = new ConnectBlockUpdates(up)
 

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/subscribe/ConnectNewHeadsSpec.groovy

@@ -2,6 +2,7 @@ package io.emeraldpay.dshackle.upstream.ethereum.subscribe
 
 import io.emeraldpay.dshackle.test.TestingCommons
 import io.emeraldpay.dshackle.upstream.Head
+import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumMultistream
 import reactor.core.publisher.Flux
 import reactor.test.StepVerifier
@@ -17,12 +18,12 @@ class ConnectNewHeadsSpec extends Specification {
             ])
         }
         def up = Mock(EthereumMultistream) {
-            1 * getHead() >> head
+            1 * getHead(Selector.empty) >> head
         }
         ConnectNewHeads connectNewHeads = new ConnectNewHeads(up)
         when:
-        def act1 = connectNewHeads.connect()
+        def act1 = connectNewHeads.connect(Selector.empty)
-        def act2 = connectNewHeads.connect()
+        def act2 = connectNewHeads.connect(Selector.empty)
         then:
         StepVerifier.create(act1)
                 .expectNextCount(1)