solution: refactoring, make ObjectMapper as a global object, not bean

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

@@ -73,20 +73,6 @@ open class Config(
         return target
     }
 
-    @Bean
-    open fun objectMapper(): ObjectMapper {
-        val module = SimpleModule("EmeraldDshackle", Version(1, 0, 0, null, null, null))
-
-        val objectMapper = ObjectMapper()
-        objectMapper.registerModule(module)
-        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
-        objectMapper
-                .setDateFormat(SimpleDateFormat("yyyy-MM-dd\'T\'HH:mm:ss.SSS"))
-                .setTimeZone(TimeZone.getTimeZone("UTC"))
-
-        return objectMapper
-    }
-
     @Bean @Qualifier("upstreamScheduler")
     open fun upstreamScheduler(): Scheduler {
         return Schedulers.fromExecutorService(Executors.newFixedThreadPool(16))

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

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) 2020 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
+
+import com.fasterxml.jackson.core.Version
+import com.fasterxml.jackson.databind.DeserializationFeature
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.databind.module.SimpleModule
+import java.text.SimpleDateFormat
+import java.util.*
+
+class Global {
+
+    companion object {
+
+        @JvmStatic
+        val objectMapper: ObjectMapper = createObjectMapper()
+
+        private fun createObjectMapper(): ObjectMapper {
+            val module = SimpleModule("EmeraldDshackle", Version(1, 0, 0, null, null, null))
+
+            val objectMapper = ObjectMapper()
+            objectMapper.registerModule(module)
+            objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
+            objectMapper
+                    .setDateFormat(SimpleDateFormat("yyyy-MM-dd\'T\'HH:mm:ss.SSS"))
+                    .setTimeZone(TimeZone.getTimeZone("UTC"))
+
+            return objectMapper
+        }
+
+    }
+
+}

src/main/kotlin/io/emeraldpay/dshackle/cache/Caches.kt

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.cache
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxContainer
@@ -34,8 +35,7 @@ open class Caches(
         private val blocksByHeight: HeightCache,
         private val memTxsByHash: TxMemCache,
         private val redisBlocksByHash: BlocksRedisCache?,
-        private val redisTxsByHash: TxRedisCache?,
+        private val redisTxsByHash: TxRedisCache?
-        private val objectMapper: ObjectMapper
 ) {
 
     companion object {
@@ -47,8 +47,8 @@ open class Caches(
         }
 
         @JvmStatic
-        fun default(objectMapper: ObjectMapper): Caches {
+        fun default(): Caches {
-            return newBuilder().setObjectMapper(objectMapper).build()
+            return newBuilder().build()
         }
     }
 
@@ -113,10 +113,10 @@ open class Caches(
             var blockOnlyContainer: BlockContainer? = null
             var jsonValue: BlockJson<*>? = null
             if (block.full) {
-                jsonValue = objectMapper.readValue<BlockJson<*>>(block.json, BlockJson::class.java)
+                jsonValue = Global.objectMapper.readValue<BlockJson<*>>(block.json, BlockJson::class.java)
                 //shouldn't cache block json with transactions, separate txes and blocks with refs
                 val blockOnly = jsonValue.withoutTransactionDetails()
-                blockOnlyContainer = BlockContainer.from(blockOnly, objectMapper)
+                blockOnlyContainer = BlockContainer.from(blockOnly)
             } else {
                 blockOnlyContainer = block
             }
@@ -128,7 +128,7 @@ open class Caches(
                 val plainTransactions = jsonValue.transactions.filterIsInstance<TransactionJson>()
                 if (plainTransactions.isNotEmpty()) {
                     val transactions = plainTransactions.map { tx ->
-                        TxContainer.from(tx, objectMapper)
+                        TxContainer.from(tx)
                     }
                     transactions.forEach {
                         cache(Tag.REQUESTED, it)
@@ -159,11 +159,11 @@ open class Caches(
     }
 
     fun getFullBlocks(): Reader<BlockId, BlockContainer> {
-        return EthereumFullBlocksReader(objectMapper, blocksByHash, txsByHash)
+        return EthereumFullBlocksReader(blocksByHash, txsByHash)
     }
 
     fun getFullBlocksByHeight(): Reader<Long, BlockContainer> {
-        return BlockByHeight(blocksByHeight, EthereumFullBlocksReader(objectMapper, blocksByHash, txsByHash))
+        return BlockByHeight(blocksByHeight, EthereumFullBlocksReader(blocksByHash, txsByHash))
     }
 
     enum class Tag {
@@ -184,7 +184,6 @@ open class Caches(
         private var txsByHash: TxMemCache? = null
         private var redisBlocksByHash: BlocksRedisCache? = null
         private var redisTxsByHash: TxRedisCache? = null
-        private var objectMapper: ObjectMapper? = null
 
         fun setBlockByHash(cache: BlocksMemCache): Builder {
             blocksByHash = cache
@@ -211,11 +210,6 @@ open class Caches(
             return this
         }
 
-        fun setObjectMapper(value: ObjectMapper): Builder {
-            objectMapper = value
-            return this
-        }
-
         fun build(): Caches {
             if (blocksByHash == null) {
                 blocksByHash = BlocksMemCache()
@@ -226,10 +220,7 @@ open class Caches(
             if (txsByHash == null) {
                 txsByHash = TxMemCache()
             }
-            if (objectMapper == null) {
+            return Caches(blocksByHash!!, blocksByHeight!!, txsByHash!!, redisBlocksByHash, redisTxsByHash)
-                throw IllegalStateException("ObjectMapper is not set")
-            }
-            return Caches(blocksByHash!!, blocksByHeight!!, txsByHash!!, redisBlocksByHash, redisTxsByHash, objectMapper!!)
         }
     }
 }

src/main/kotlin/io/emeraldpay/dshackle/cache/CachesFactory.kt

@@ -33,7 +33,6 @@ import javax.annotation.PostConstruct
 
 @Repository
 class CachesFactory(
-        @Autowired private val objectMapper: ObjectMapper,
         @Autowired private val cacheConfig: CacheConfig
 ) {
 
@@ -74,7 +73,6 @@ class CachesFactory(
 
     private fun initCache(chain: Chain): Caches {
         val caches = Caches.newBuilder()
-                .setObjectMapper(objectMapper)
         redis?.let { redis ->
             caches.setBlockByHash(BlocksRedisCache(redis.reactive(), chain))
             caches.setTxByHash(TxRedisCache(redis.reactive(), chain))

src/main/kotlin/io/emeraldpay/dshackle/data/BlockContainer.kt

@@ -16,11 +16,9 @@
  */
 package io.emeraldpay.dshackle.data
 
-import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.infinitape.etherjar.rpc.json.BlockJson
 import io.infinitape.etherjar.rpc.json.TransactionJson
-import io.infinitape.etherjar.rpc.json.TransactionRefJson
-import org.apache.commons.codec.binary.Hex
 import java.math.BigInteger
 import java.time.Instant
 
@@ -52,13 +50,13 @@ class BlockContainer(
         }
 
         @JvmStatic
-        fun from(block: BlockJson<*>, objectMapper: ObjectMapper): BlockContainer {
+        fun from(block: BlockJson<*>): BlockContainer {
-            return from(block, objectMapper.writeValueAsBytes(block))
+            return from(block, Global.objectMapper.writeValueAsBytes(block))
         }
 
         @JvmStatic
-        fun from(raw: ByteArray, objectMapper: ObjectMapper): BlockContainer {
+        fun from(raw: ByteArray): BlockContainer {
-            val block = objectMapper.readValue(raw, BlockJson::class.java)
+            val block = Global.objectMapper.readValue(raw, BlockJson::class.java)
             return from(block, raw)
         }
     }

src/main/kotlin/io/emeraldpay/dshackle/data/TxContainer.kt

@@ -17,6 +17,7 @@
 package io.emeraldpay.dshackle.data
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.infinitape.etherjar.rpc.json.TransactionJson
 
 class TxContainer(
@@ -29,8 +30,8 @@ class TxContainer(
 
     companion object {
         @JvmStatic
-        fun from(tx: TransactionJson, objectMapper: ObjectMapper): TxContainer {
+        fun from(tx: TransactionJson): TxContainer {
-            return from(tx, objectMapper.writeValueAsBytes(tx))
+            return from(tx, Global.objectMapper.writeValueAsBytes(tx))
         }
 
         fun from(tx: TransactionJson, raw: ByteArray): TxContainer {

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

@@ -19,6 +19,7 @@ package io.emeraldpay.dshackle.proxy
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.google.protobuf.ByteString
 import io.emeraldpay.api.proto.BlockchainOuterClass
+import io.emeraldpay.dshackle.Global
 import io.infinitape.etherjar.rpc.RpcException
 import io.infinitape.etherjar.rpc.RpcResponseError
 import io.infinitape.etherjar.rpc.json.RequestJson
@@ -36,7 +37,6 @@ import java.util.stream.Collectors
  */
 @Service
 open class ReadRpcJson(
-        @Autowired private val objectMapper: ObjectMapper
 ) : Function<ByteArray, ProxyCall> {
 
     companion object {
@@ -45,6 +45,7 @@ open class ReadRpcJson(
     }
 
     private val jsonExtractor: Function<Map<*, *>, RequestJson<Any>>
+    private val objectMapper: ObjectMapper = Global.objectMapper
 
     init {
         jsonExtractor = Function { json ->

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

@@ -18,6 +18,7 @@ package io.emeraldpay.dshackle.proxy
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.api.proto.BlockchainOuterClass
+import io.emeraldpay.dshackle.Global
 import io.infinitape.etherjar.rpc.RpcResponseError
 import io.infinitape.etherjar.rpc.json.ResponseJson
 import org.slf4j.LoggerFactory
@@ -33,14 +34,14 @@ import java.util.function.Function
  * Writer for JSON RPC requests
  */
 @Service
-open class WriteRpcJson(
+open class WriteRpcJson() {
-        @Autowired private val objectMapper: ObjectMapper
-) {
 
     companion object {
         private val log = LoggerFactory.getLogger(WriteRpcJson::class.java)
     }
 
+    private val objectMapper: ObjectMapper = Global.objectMapper
+
     /**
      * Convert Dshackle protobuf based responses to JSON RPC formatted as strings
      */

src/main/kotlin/io/emeraldpay/dshackle/quorum/BroadcastQuorum.kt

@@ -22,9 +22,8 @@ import io.emeraldpay.dshackle.upstream.Upstream
 import io.infinitape.etherjar.rpc.JacksonRpcConverter
 
 open class BroadcastQuorum(
-        objectMapper: ObjectMapper,
         val quorum: Int = 3
-) : CallQuorum, ValueAwareQuorum<String>(objectMapper, String::class.java) {
+) : CallQuorum, ValueAwareQuorum<String>(String::class.java) {
 
     private var result: ByteArray? = null
     private var txid: String? = null

src/main/kotlin/io/emeraldpay/dshackle/quorum/NonEmptyQuorum.kt

@@ -23,9 +23,8 @@ import io.infinitape.etherjar.rpc.JacksonRpcConverter
 import io.infinitape.etherjar.rpc.RpcException
 
 open class NonEmptyQuorum(
-        objectMapper: ObjectMapper,
         val maxTries: Int = 3
-) : CallQuorum, ValueAwareQuorum<Any>(objectMapper, Any::class.java) {
+) : CallQuorum, ValueAwareQuorum<Any>(Any::class.java) {
 
     private var result: ByteArray? = null
     private var tries: Int = 0

src/main/kotlin/io/emeraldpay/dshackle/quorum/NonceQuorum.kt

@@ -26,9 +26,8 @@ import java.util.concurrent.locks.ReentrantLock
 import kotlin.concurrent.withLock
 
 open class NonceQuorum(
-        objectMapper: ObjectMapper,
         val tries: Int = 3
-) : CallQuorum, ValueAwareQuorum<String>(objectMapper, String::class.java) {
+) : CallQuorum, ValueAwareQuorum<String>(String::class.java) {
 
     private val lock = ReentrantLock()
     private var resultValue = 0L

src/main/kotlin/io/emeraldpay/dshackle/quorum/ValueAwareQuorum.kt

@@ -17,20 +17,20 @@
 package io.emeraldpay.dshackle.quorum
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.upstream.Upstream
 import io.infinitape.etherjar.rpc.JacksonRpcConverter
 import io.infinitape.etherjar.rpc.RpcException
 import org.slf4j.LoggerFactory
 
 abstract class ValueAwareQuorum<T>(
-        val objectMapper: ObjectMapper,
         val clazz: Class<T>
 ): CallQuorum {
 
     private val log = LoggerFactory.getLogger(ValueAwareQuorum::class.java)
 
     fun extractValue(response: ByteArray, clazz: Class<T>): T? {
-        return objectMapper.readValue(response.inputStream(), clazz)
+        return Global.objectMapper.readValue(response.inputStream(), clazz)
     }
 
     override fun record(response: ByteArray, upstream: Upstream): Boolean {

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

@@ -20,6 +20,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import com.google.protobuf.ByteString
 import io.emeraldpay.api.proto.BlockchainOuterClass
 import io.emeraldpay.dshackle.BlockchainType
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.SilentException
 import io.emeraldpay.dshackle.upstream.*
 import io.emeraldpay.dshackle.quorum.AlwaysQuorum
@@ -42,11 +43,11 @@ import java.lang.Exception
 
 @Service
 open class NativeCall(
-        @Autowired private val multistreamHolder: MultistreamHolder,
+        @Autowired private val multistreamHolder: MultistreamHolder
-        @Autowired private val objectMapper: ObjectMapper
 ) {
 
     private val log = LoggerFactory.getLogger(NativeCall::class.java)
+    private val objectMapper: ObjectMapper = Global.objectMapper
 
     var quorumReaderFactory: QuorumReaderFactory = QuorumReaderFactory.default()
 

src/main/kotlin/io/emeraldpay/dshackle/startup/ConfiguredUpstreams.kt

@@ -19,6 +19,7 @@ package io.emeraldpay.dshackle.startup
 import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.dshackle.BlockchainType
 import io.emeraldpay.dshackle.FileResolver
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.cache.CachesFactory
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.reader.Reader
@@ -44,7 +45,6 @@ import kotlin.collections.HashMap
 
 @Repository
 open class ConfiguredUpstreams(
-        @Autowired private val objectMapper: ObjectMapper,
         @Autowired private val currentUpstreams: CurrentMultistreamHolder,
         @Autowired private val fileResolver: FileResolver,
         @Autowired private val config: UpstreamsConfig,
@@ -146,7 +146,7 @@ open class ConfiguredUpstreams(
         val upstream = BitcoinUpstream(config.id
                 ?: "bitcoin-${seq.getAndIncrement()}", chain, directApi,
                 options, QuorumForLabels.QuorumItem(1, config.labels),
-                objectMapper, methods)
+                methods)
 
         upstream.start()
         currentUpstreams.update(UpstreamChange(chain, upstream, UpstreamChange.ChangeType.ADDED))
@@ -171,8 +171,7 @@ open class ConfiguredUpstreams(
         val wsFactoryApi: EthereumWsFactory? = conn.ws?.let { endpoint ->
             val wsApi = EthereumWsFactory(
                     endpoint.url,
-                    endpoint.origin ?: URI("http://localhost"),
+                    endpoint.origin ?: URI("http://localhost")
-                    objectMapper
             )
             endpoint.basicAuth?.let { auth ->
                 wsApi.basicAuth = auth
@@ -186,8 +185,7 @@ open class ConfiguredUpstreams(
                 config.id!!,
                 chain, directApi, wsFactoryApi, options,
                 QuorumForLabels.QuorumItem(1, config.labels),
-                methods,
+                methods
-                objectMapper
         )
         ethereumUpstream.start()
         currentUpstreams.update(UpstreamChange(chain, ethereumUpstream, UpstreamChange.ChangeType.ADDED))
@@ -199,7 +197,6 @@ open class ConfiguredUpstreams(
                 config.id!!,
                 endpoint.host!!,
                 endpoint.port ?: 2449,
-                objectMapper,
                 endpoint.auth,
                 fileResolver
         ).apply {
@@ -225,7 +222,6 @@ open class ConfiguredUpstreams(
             urls.add(endpoint.url)
             JsonRpcHttpClient(
                     endpoint.url.toString(),
-                    objectMapper,
                     conn.rpc?.basicAuth,
                     tls
             )

src/main/kotlin/io/emeraldpay/dshackle/upstream/CurrentMultistreamHolder.kt

@@ -18,6 +18,7 @@ package io.emeraldpay.dshackle.upstream
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.dshackle.BlockchainType
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.cache.CachesEnabled
 import io.emeraldpay.dshackle.cache.CachesFactory
 import io.emeraldpay.dshackle.startup.UpstreamChange
@@ -43,12 +44,13 @@ import kotlin.concurrent.withLock
 
 @Repository
 class CurrentMultistreamHolder(
-        @Autowired private val objectMapper: ObjectMapper,
         @Autowired private val cachesFactory: CachesFactory
 ) : MultistreamHolder {
 
     private val log = LoggerFactory.getLogger(CurrentMultistreamHolder::class.java)
 
+    private val objectMapper: ObjectMapper = Global.objectMapper
+
     private val chainMapping = ConcurrentHashMap<Chain, Multistream>()
     private val chainsBus = TopicProcessor.create<Chain>()
     private val callTargets = HashMap<Chain, CallMethods>()
@@ -62,7 +64,7 @@ class CurrentMultistreamHolder(
                     val up = change.upstream.cast(EthereumUpstream::class.java)
                     val current = chainMapping[chain] as Multistream?
                     val factory = Callable {
-                        EthereumMultistream(chain, ArrayList(), cachesFactory.getCaches(chain), objectMapper) as Multistream
+                        EthereumMultistream(chain, ArrayList(), cachesFactory.getCaches(chain)) as Multistream
                     }
                     processUpdate(change, up, current, factory)
                 }
@@ -70,7 +72,7 @@ class CurrentMultistreamHolder(
                     val up = change.upstream.cast(BitcoinUpstream::class.java)
                     val current = chainMapping[chain] as Multistream?
                     val factory = Callable {
-                        BitcoinMultistream(chain, ArrayList(), cachesFactory.getCaches(chain), objectMapper) as Multistream
+                        BitcoinMultistream(chain, ArrayList(), cachesFactory.getCaches(chain)) as Multistream
                     }
                     processUpdate(change, up, current, factory)
                 }
@@ -135,8 +137,8 @@ class CurrentMultistreamHolder(
 
     fun setupDefaultMethods(chain: Chain): CallMethods {
         val created = when (BlockchainType.fromBlockchain(chain)) {
-            BlockchainType.ETHEREUM -> DefaultEthereumMethods(objectMapper, chain)
+            BlockchainType.ETHEREUM -> DefaultEthereumMethods(chain)
-            BlockchainType.BITCOIN -> DefaultBitcoinMethods(objectMapper)
+            BlockchainType.BITCOIN -> DefaultBitcoinMethods()
             else -> throw IllegalStateException("Unsupported chain: $chain")
         }
         callTargets[chain] = created

src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinMultistream.kt

@@ -31,8 +31,7 @@ import reactor.core.publisher.Mono
 open class BitcoinMultistream(
         chain: Chain,
         val upstreams: MutableList<BitcoinUpstream>,
-        caches: Caches,
+        caches: Caches
-        private val objectMapper: ObjectMapper
 ) : Multistream(chain, upstreams as MutableList<Upstream>, caches), Lifecycle {
 
     companion object {
@@ -40,7 +39,7 @@ open class BitcoinMultistream(
     }
 
     private var head: Head? = null
-    private var reader = BitcoinReader(this, EmptyHead(), objectMapper)
+    private var reader = BitcoinReader(this, EmptyHead())
 
     override fun init() {
         if (upstreams.size > 0) {
@@ -84,7 +83,7 @@ open class BitcoinMultistream(
 
     override fun setHead(head: Head) {
         this.head = head
-        reader = BitcoinReader(this, head, objectMapper)
+        reader = BitcoinReader(this, head)
     }
 
     override fun getHead(): Head {

src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinReader.kt

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.upstream.bitcoin
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
@@ -27,15 +28,15 @@ import reactor.kotlin.core.publisher.cast
 
 open class BitcoinReader(
         private val upstreams: BitcoinMultistream,
-        head: Head,
+        head: Head
-        private val objectMapper: ObjectMapper
 ) : Lifecycle {
 
     companion object {
         private val log = LoggerFactory.getLogger(BitcoinReader::class.java)
     }
 
-    private val mempool = CachingMempoolData(upstreams, head, objectMapper)
+    private val objectMapper: ObjectMapper = Global.objectMapper
+    private val mempool = CachingMempoolData(upstreams, head)
 
     open fun getMempool(): CachingMempoolData {
         return mempool

src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinUpstream.kt

@@ -35,7 +35,6 @@ open class BitcoinUpstream(
         private val directApi: Reader<JsonRpcRequest, JsonRpcResponse>,
         options: UpstreamsConfig.Options,
         val node: QuorumForLabels.QuorumItem,
-        private val objectMapper: ObjectMapper,
         callMethods: CallMethods
 ) : DefaultUpstream(id, options, callMethods), Lifecycle {
 
@@ -49,7 +48,7 @@ open class BitcoinUpstream(
     private fun createHead(): Head {
         return BitcoinRpcHead(
                 directApi,
-                ExtractBlock(objectMapper)
+                ExtractBlock()
         )
     }
 

src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/CachingMempoolData.kt

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.upstream.bitcoin
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
@@ -31,8 +32,7 @@ import java.util.concurrent.locks.ReentrantLock
 
 open class CachingMempoolData(
         private val upstreams: BitcoinMultistream,
-        private val head: Head,
+        private val head: Head
-        private val objectMapper: ObjectMapper
 ) : Lifecycle {
 
     companion object {
@@ -40,6 +40,8 @@ open class CachingMempoolData(
         private val TTL = Duration.ofSeconds(15)
     }
 
+    private val objectMapper: ObjectMapper = Global.objectMapper
+
     private val current = AtomicReference<Container>(Container.empty())
     private val updateLock = ReentrantLock()
     private var headListener: Disposable? = null

src/main/kotlin/io/emeraldpay/dshackle/upstream/bitcoin/ExtractBlock.kt

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.upstream.bitcoin
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxId
@@ -24,9 +25,7 @@ import org.slf4j.LoggerFactory
 import java.math.BigInteger
 import java.time.Instant
 
-class ExtractBlock(
+class ExtractBlock() {
-        private val objectMapper: ObjectMapper
-) {
 
     companion object {
         private val log = LoggerFactory.getLogger(ExtractBlock::class.java)
@@ -50,6 +49,8 @@ class ExtractBlock(
         }
     }
 
+    private val objectMapper: ObjectMapper = Global.objectMapper
+
     fun extract(json: ByteArray): BlockContainer {
         val data = objectMapper.readValue(json, Map::class.java) as Map<String, Any>
 

src/main/kotlin/io/emeraldpay/dshackle/upstream/calls/DefaultBitcoinMethods.kt

@@ -20,9 +20,7 @@ import io.emeraldpay.dshackle.quorum.*
 import io.infinitape.etherjar.rpc.RpcException
 import java.util.*
 
-class DefaultBitcoinMethods(
+class DefaultBitcoinMethods() : CallMethods {
-        private val objectMapper: ObjectMapper
-) : CallMethods {
 
     private val anyResponseMethods = listOf(
             "getblock",
@@ -50,7 +48,7 @@ class DefaultBitcoinMethods(
             Collections.binarySearch(hardcodedMethods, method) >= 0 -> AlwaysQuorum()
             Collections.binarySearch(anyResponseMethods, method) >= 0 -> NotLaggingQuorum(2)
             Collections.binarySearch(headVerifiedMethods, method) >= 0 -> NotLaggingQuorum(0)
-            Collections.binarySearch(broadcastMethods, method) >= 0 -> BroadcastQuorum(objectMapper)
+            Collections.binarySearch(broadcastMethods, method) >= 0 -> BroadcastQuorum()
             else -> AlwaysQuorum()
         }
     }

src/main/kotlin/io/emeraldpay/dshackle/upstream/calls/DefaultEthereumMethods.kt

@@ -28,7 +28,6 @@ import java.util.*
  * hardcoded results for base methods, such as `net_version`, `web3_clientVersion` and similar
  */
 class DefaultEthereumMethods(
-        private val objectMapper: ObjectMapper,
         private val chain: Chain
 ) : CallMethods {
 
@@ -88,9 +87,9 @@ class DefaultEthereumMethods(
             headVerifiedMethods.contains(method) -> NotLaggingQuorum(1)
             specialMethods.contains(method) -> {
                 when (method) {
-                    "eth_getTransactionCount" -> NonceQuorum(objectMapper)
+                    "eth_getTransactionCount" -> NonceQuorum()
                     "eth_getBalance" -> NotLaggingQuorum(1)
-                    "eth_sendRawTransaction" -> BroadcastQuorum(objectMapper)
+                    "eth_sendRawTransaction" -> BroadcastQuorum()
                     else -> AlwaysQuorum()
                 }
             }

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

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxContainer
@@ -37,7 +38,6 @@ import reactor.core.publisher.Mono
  * If any of the expected block transactions is not available it returns empty
  */
 class EthereumFullBlocksReader(
-        private val objectMapper: ObjectMapper,
         private val blocks: Reader<BlockId, BlockContainer>,
         private val txes: Reader<TxId, TxContainer>
 ) : Reader<BlockId, BlockContainer> {
@@ -48,7 +48,7 @@ class EthereumFullBlocksReader(
 
     override fun read(key: BlockId): Mono<BlockContainer> {
         return blocks.read(key).flatMap { block ->
-            val block = objectMapper.readValue(block.json, BlockJson::class.java) as BlockJson<TransactionRefJson>
+            val block = Global.objectMapper.readValue(block.json, BlockJson::class.java) as BlockJson<TransactionRefJson>
             val fullBlock = if (block.transactions == null || block.transactions.isEmpty()) {
                 // in fact it's not necessary to create a copy, made just for code clarity but it may be a performance loss
                 val fullBlock = BlockJson<TransactionJson>()
@@ -66,7 +66,7 @@ class EthereumFullBlocksReader(
                                 val fullBlock = BlockJson<TransactionJson>()
                                 BeanUtils.copyProperties(block, fullBlock)
                                 fullBlock.transactions = list.map {
-                                    objectMapper.readValue(it.json, TransactionJson::class.java)
+                                    Global.objectMapper.readValue(it.json, TransactionJson::class.java)
                                 }
                                 Mono.just(fullBlock)
                             }
@@ -75,7 +75,7 @@ class EthereumFullBlocksReader(
             fullBlock
                     .map { block ->
                         BlockContainer(block.number, BlockId.from(block.hash), block.totalDifficulty, block.timestamp, true,
-                                objectMapper.writeValueAsBytes(block),
+                                Global.objectMapper.writeValueAsBytes(block),
                                 block.transactions.map { tx -> TxId.from(tx) }
                         )
                     }

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

@@ -17,6 +17,7 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.cache.Caches
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.reader.Reader
@@ -31,17 +32,17 @@ import reactor.core.publisher.Mono
 open class EthereumMultistream(
         chain: Chain,
         val upstreams: MutableList<EthereumUpstream>,
-        caches: Caches,
+        caches: Caches
-        private val objectMapper: ObjectMapper
 ) : Multistream(chain, upstreams as MutableList<Upstream>, caches) {
 
     companion object {
         private val log = LoggerFactory.getLogger(EthereumMultistream::class.java)
     }
 
+    private val objectMapper: ObjectMapper = Global.objectMapper
     private var head: Head? = null
 
-    private val reader: EthereumReader = EthereumReader(this, this.caches, objectMapper)
+    private val reader: EthereumReader = EthereumReader(this, this.caches)
 
     init {
         this.init()
@@ -119,7 +120,7 @@ open class EthereumMultistream(
     }
 
     override fun getRoutedApi(matcher: Selector.Matcher): Mono<Reader<JsonRpcRequest, JsonRpcResponse>> {
-        return Mono.just(NativeCallRouter(objectMapper, reader, getMethods()))
+        return Mono.just(NativeCallRouter(reader, getMethods()))
     }
 
 }

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

@@ -17,6 +17,7 @@ package io.emeraldpay.dshackle.upstream.ethereum
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.dshackle.Defaults
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.cache.Caches
 import io.emeraldpay.dshackle.cache.CurrentBlockCache
 import io.emeraldpay.dshackle.data.*
@@ -46,14 +47,14 @@ import java.util.function.Function
 
 open class EthereumReader(
         private val up: Multistream,
-        private val caches: Caches,
+        private val caches: Caches
-        private val objectMapper: ObjectMapper
 ) : Lifecycle {
 
     companion object {
         private val log = LoggerFactory.getLogger(EthereumReader::class.java)
     }
 
+    private val objectMapper: ObjectMapper = Global.objectMapper
     private val balanceCache = CurrentBlockCache<Address, Wei>()
 
     val extractBlock = Function<BlockContainer, BlockJson<TransactionRefJson>> { block ->
@@ -80,10 +81,10 @@ open class EthereumReader(
     }
 
     val blockAsContainer = Function<BlockJson<*>, BlockContainer> { block ->
-        BlockContainer.from(block.withoutTransactionDetails(), objectMapper)
+        BlockContainer.from(block.withoutTransactionDetails())
     }
     val txAsContainer = Function<TransactionJson, TxContainer> { tx ->
-        TxContainer.from(tx, objectMapper)
+        TxContainer.from(tx)
     }
 
     private val blocksDirect: Reader<BlockHash, BlockContainer>
@@ -150,9 +151,13 @@ open class EthereumReader(
                             .timeout(Defaults.timeoutInternal, Mono.error(TimeoutException("Tx not read $key")))
                             .map(directResponseBytes)
                             .retryWhen(Retry.backoff(3, Duration.ofSeconds(1)))
-                            .map { txbytes ->
+                            .flatMap { txbytes ->
                                 val tx = objectMapper.readValue(txbytes, TransactionJson::class.java)
-                                TxContainer.from(tx, txbytes)
+                                if (tx == null) {
+                                    Mono.empty()
+                                } else {
+                                    Mono.just(TxContainer.from(tx, txbytes))
+                                }
                             }
                             .doOnNext { tx ->
                                 if (tx.blockId != null) {

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

@@ -35,8 +35,7 @@ import java.time.Duration
 import java.util.concurrent.Executors
 
 class EthereumRpcHead(
-        private val api: Reader<in JsonRpcRequest, out JsonRpcResponse>,
+        private val api: Reader<JsonRpcRequest, JsonRpcResponse>,
-        private val objectMapper: ObjectMapper,
         private val interval: Duration = Duration.ofSeconds(10)
 ): DefaultEthereumHead(), Lifecycle {
 
@@ -72,7 +71,7 @@ class EthereumRpcHead(
                             .timeout(Defaults.timeout, Mono.error(Exception("Block data not received")))
                 }
                 .map {
-                    BlockContainer.from(it.getResult(), objectMapper)
+                    BlockContainer.from(it.getResult())
                 }
                 .onErrorContinue { err, _ ->
                     log.debug("RPC error ${err.message}")

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

@@ -41,13 +41,12 @@ open class EthereumUpstream(
         private val ethereumWsFactory: EthereumWsFactory? = null,
         options: UpstreamsConfig.Options,
         val node: QuorumForLabels.QuorumItem,
-        targets: CallMethods,
+        targets: CallMethods
-        private val objectMapper: ObjectMapper
 ) : DefaultUpstream(id, options, targets), Upstream, CachesEnabled, Lifecycle {
 
-    constructor(id: String, chain: Chain, api: Reader<JsonRpcRequest, JsonRpcResponse>, objectMapper: ObjectMapper) : this(id, chain, api, null,
+    constructor(id: String, chain: Chain, api: Reader<JsonRpcRequest, JsonRpcResponse>) : this(id, chain, api, null,
             UpstreamsConfig.Options.getDefaults(), QuorumForLabels.QuorumItem(1, UpstreamsConfig.Labels()),
-            DirectCallMethods(), objectMapper)
+            DirectCallMethods())
 
 
     private val log = LoggerFactory.getLogger(EthereumUpstream::class.java)
@@ -68,7 +67,7 @@ open class EthereumUpstream(
             this.setLag(0)
             this.setStatus(UpstreamAvailability.OK)
         } else {
-            val validator = EthereumUpstreamValidator(this, getOptions(), objectMapper)
+            val validator = EthereumUpstreamValidator(this, getOptions())
             validatorSubscription = validator.start()
                     .subscribe(this::setStatus)
         }
@@ -95,7 +94,7 @@ open class EthereumUpstream(
                 start()
             }
             // receive bew blocks through WebSockets, but also periodically verify with RPC in case if WS failed
-            val rpcHead = EthereumRpcHead(getApi(), objectMapper, Duration.ofSeconds(60)).apply {
+            val rpcHead = EthereumRpcHead(getApi(), Duration.ofSeconds(60)).apply {
                 start()
             }
             MergedHead(listOf(rpcHead, wsHead)).apply {
@@ -103,7 +102,7 @@ open class EthereumUpstream(
             }
         } else {
             log.warn("Setting up upstream ${this.getId()} with RPC-only access, less effective than WS+RPC")
-            EthereumRpcHead(getApi(), objectMapper).apply {
+            EthereumRpcHead(getApi()).apply {
                 start()
             }
         }

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

@@ -18,6 +18,7 @@ package io.emeraldpay.dshackle.upstream.ethereum
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.dshackle.Defaults
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.upstream.UpstreamAvailability
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
@@ -33,14 +34,15 @@ import java.util.concurrent.Executors
 
 class EthereumUpstreamValidator(
         private val upstream: EthereumUpstream,
-        private val options: UpstreamsConfig.Options,
+        private val options: UpstreamsConfig.Options
-        private val objectMapper: ObjectMapper
 ) {
     companion object {
         private val log = LoggerFactory.getLogger(EthereumUpstreamValidator::class.java)
         val scheduler = Schedulers.fromExecutor(Executors.newCachedThreadPool(CustomizableThreadFactory("ethereum-validator")))
     }
 
+    private val objectMapper: ObjectMapper = Global.objectMapper
+
     fun validate(): Mono<UpstreamAvailability> {
         return upstream
                 .getApi()

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

@@ -18,6 +18,7 @@ package io.emeraldpay.dshackle.upstream.ethereum
 
 import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.dshackle.Defaults
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.SilentException
 import io.emeraldpay.dshackle.config.AuthConfig
 import io.emeraldpay.dshackle.data.BlockContainer
@@ -37,21 +38,19 @@ import java.time.Duration
 
 class EthereumWsFactory(
         private val uri: URI,
-        private val origin: URI,
+        private val origin: URI
-        private val objectMapper: ObjectMapper
 ) {
 
     var basicAuth: AuthConfig.ClientBasicAuth? = null
 
     fun create(upstream: EthereumUpstream): EthereumWs {
-        return EthereumWs(uri, origin, upstream, objectMapper, basicAuth)
+        return EthereumWs(uri, origin, upstream, basicAuth)
     }
 
     class EthereumWs(
             private val uri: URI,
             private val origin: URI,
             private val upstream: EthereumUpstream,
-            private val objectMapper: ObjectMapper,
             private val basicAuth: AuthConfig.ClientBasicAuth?
     ) {
 
@@ -96,7 +95,7 @@ class EthereumWsFactory(
                                         }
                                     }
                                     .flatMap(JsonRpcResponse::requireResult)
-                                    .map { BlockContainer.from(it, objectMapper) }
+                                    .map { BlockContainer.from(it) }
                         }.repeatWhenEmpty { n ->
                             Repeat.times<Any>(5)
                                     .exponentialBackoff(Duration.ofMillis(50), Duration.ofMillis(500))
@@ -107,7 +106,7 @@ class EthereumWsFactory(
                         .subscribe(topic::onNext)
 
             } else {
-                topic.onNext(BlockContainer.from(block, objectMapper))
+                topic.onNext(BlockContainer.from(block))
             }
         }
 

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

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxId
 import io.emeraldpay.dshackle.reader.Reader
@@ -30,7 +31,6 @@ import reactor.core.publisher.Mono
 import java.math.BigInteger
 
 class NativeCallRouter(
-        private val objectMapper: ObjectMapper,
         private val reader: EthereumReader,
         private val methods: CallMethods
 ) : Reader<JsonRpcRequest, JsonRpcResponse> {
@@ -40,7 +40,6 @@ class NativeCallRouter(
     }
 
     private val fullBlocksReader = EthereumFullBlocksReader(
-            objectMapper,
             reader.blocksByIdAsCont(),
             reader.txByHashAsCont()
     )

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

@@ -56,7 +56,6 @@ open class EthereumGrpcUpstream(
         private val parentId: String,
         private val chain: Chain,
         private val blockchainStub: ReactorBlockchainGrpc.ReactorBlockchainStub,
-        private val objectMapper: ObjectMapper,
         private val client: JsonRpcGrpcClient
 ) : DefaultUpstream(
         "$parentId/${chain.chainCode}",
@@ -125,7 +124,7 @@ open class EthereumGrpcUpstream(
             defaultReader.read(JsonRpcRequest("eth_getBlockByHash", listOf(it.hash.toHexWithPrefix(), false)))
                     .flatMap(JsonRpcResponse::requireResult)
                     .map {
-                        BlockContainer.from(it, objectMapper)
+                        BlockContainer.from(it)
                     }
                     .timeout(timeout, Mono.error(TimeoutException("Timeout from upstream")))
                     .doOnError { t ->

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

@@ -46,7 +46,6 @@ class GrpcUpstreams(
         private val id: String,
         private val host: String,
         private val port: Int,
-        private val objectMapper: ObjectMapper,
         private val auth: AuthConfig.ClientTlsAuth? = null,
         private val fileResolver: FileResolver
 ) {
@@ -157,8 +156,8 @@ class GrpcUpstreams(
         lock.withLock {
             val current = known[chain]
             return if (current == null) {
-                val rpcClient = JsonRpcGrpcClient(client!!, chain, objectMapper)
+                val rpcClient = JsonRpcGrpcClient(client!!, chain)
-                val created = EthereumGrpcUpstream(id, chain, client!!, objectMapper, rpcClient)
+                val created = EthereumGrpcUpstream(id, chain, client!!, rpcClient)
                 created.timeout = this.timeout
                 known[chain] = created
                 created.start()

src/main/kotlin/io/emeraldpay/dshackle/upstream/rpcclient/JsonRpcGrpcClient.kt

@@ -19,6 +19,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import com.google.protobuf.ByteString
 import io.emeraldpay.api.proto.BlockchainOuterClass
 import io.emeraldpay.api.proto.ReactorBlockchainGrpc
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.upstream.Selector
 import io.emeraldpay.grpc.Chain
@@ -30,8 +31,7 @@ import reactor.core.publisher.Mono
 
 class JsonRpcGrpcClient(
         private val stub: ReactorBlockchainGrpc.ReactorBlockchainStub,
-        private val chain: Chain,
+        private val chain: Chain
-        private val objectMapper: ObjectMapper
 ) {
 
     companion object {
@@ -39,14 +39,13 @@ class JsonRpcGrpcClient(
     }
 
     fun forSelector(matcher: Selector.Matcher): Reader<JsonRpcRequest, JsonRpcResponse> {
-        return Executor(stub, chain, matcher, objectMapper)
+        return Executor(stub, chain, matcher)
     }
 
     class Executor(
             private val stub: ReactorBlockchainGrpc.ReactorBlockchainStub,
             private val chain: Chain,
-            private val matcher: Selector.Matcher,
+            private val matcher: Selector.Matcher
-            private val objectMapper: ObjectMapper
     ) : Reader<JsonRpcRequest, JsonRpcResponse> {
 
         private val parser = JsonRpcParser()
@@ -64,7 +63,7 @@ class JsonRpcGrpcClient(
             BlockchainOuterClass.NativeCallItem.newBuilder()
                     .setId(1)
                     .setMethod(key.method)
-                    .setPayload(ByteString.copyFrom(objectMapper.writeValueAsBytes(key.params)))
+                    .setPayload(ByteString.copyFrom(Global.objectMapper.writeValueAsBytes(key.params)))
                     .build().let {
                         req.addItems(it)
                     }

src/main/kotlin/io/emeraldpay/dshackle/upstream/rpcclient/JsonRpcHttpClient.kt

@@ -38,7 +38,6 @@ import java.util.function.Consumer
  */
 class JsonRpcHttpClient(
         private val target: String,
-        private val objectMapper: ObjectMapper,
         basicAuth: AuthConfig.ClientBasicAuth? = null,
         tlsCAAuth: ByteArray? = null
 ) : Reader<JsonRpcRequest, JsonRpcResponse> {
@@ -94,7 +93,7 @@ class JsonRpcHttpClient(
 
     override fun read(key: JsonRpcRequest): Mono<JsonRpcResponse> {
         return Mono.just(key)
-                .map { it.toJson(objectMapper) }
+                .map(JsonRpcRequest::toJson)
                 .flatMap(this@JsonRpcHttpClient::execute)
                 .map(parser::parse)
     }

src/main/kotlin/io/emeraldpay/dshackle/upstream/rpcclient/JsonRpcRequest.kt

@@ -15,21 +15,21 @@
  */
 package io.emeraldpay.dshackle.upstream.rpcclient
 
-import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 
 class JsonRpcRequest(
         val method: String,
         val params: List<Any>
 ) {
 
-    fun toJson(objectMapper: ObjectMapper): ByteArray {
+    fun toJson(): ByteArray {
         val json = mapOf(
                 "jsonrpc" to "2.0",
                 "id" to 1,
                 "method" to method,
                 "params" to params
         )
-        return objectMapper.writeValueAsBytes(json)
+        return Global.objectMapper.writeValueAsBytes(json)
     }
 
     override fun equals(other: Any?): Boolean {

src/test/groovy/io/emeraldpay/dshackle/cache/BlockByHeightSpec.groovy

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.cache
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.test.TestingCommons
 import io.infinitape.etherjar.domain.BlockHash
@@ -31,7 +32,7 @@ class BlockByHeightSpec extends Specification {
     String hash1 = "0xd3f34def3c56ba4e701540d15edaff9acd2a1c968a7ff83b3300ab5dfd5f6aab"
     String hash2 = "0x4aabdaff9acd2f30d15e00ab5dfd5f6c56ba4ea1c968a7ff8d3f34de70153b33"
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def "Fetch with all data available"() {
         setup:
@@ -46,7 +47,7 @@ class BlockByHeightSpec extends Specification {
         block.uncles = []
         block.transactions = []
 
-        BlockContainer.from(block, objectMapper).with {
+        BlockContainer.from(block).with {
             blocks.add(it)
             heights.add(it)
         }
@@ -81,11 +82,11 @@ class BlockByHeightSpec extends Specification {
         block2.transactions = []
 
 
-        BlockContainer.from(block1, objectMapper).with {
+        BlockContainer.from(block1).with {
             blocks.add(it)
             heights.add(it)
         }
-        BlockContainer.from(block2, objectMapper).with {
+        BlockContainer.from(block2).with {
             blocks.add(it)
             heights.add(it)
         }
@@ -124,11 +125,11 @@ class BlockByHeightSpec extends Specification {
         block2.uncles = []
         block2.transactions = []
 
-        BlockContainer.from(block1, objectMapper).with {
+        BlockContainer.from(block1).with {
             blocks.add(it)
             heights.add(it)
         }
-        BlockContainer.from(block2, objectMapper).with {
+        BlockContainer.from(block2).with {
             blocks.add(it)
             heights.add(it)
         }
@@ -153,7 +154,7 @@ class BlockByHeightSpec extends Specification {
         block.timestamp = Instant.now()
 
         // add only to heights
-        BlockContainer.from(block, objectMapper).with {
+        BlockContainer.from(block).with {
             heights.add(it)
         }
 
@@ -177,7 +178,7 @@ class BlockByHeightSpec extends Specification {
         block.timestamp = Instant.now()
 
         // add only to blocks
-        BlockContainer.from(block, objectMapper).with {
+        BlockContainer.from(block).with {
             blocks.add(it)
         }
 

src/test/groovy/io/emeraldpay/dshackle/cache/BlocksMemCacheSpec.groovy

@@ -17,6 +17,7 @@
 package io.emeraldpay.dshackle.cache
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.test.TestingCommons
@@ -35,8 +36,6 @@ class BlocksMemCacheSpec extends Specification {
     String hash3 = "0x40d15edaff9acdabd2a1c96fd5f683b3300aad34e7015f34def3c56ba8a7ffb5"
     String hash4 = "0xa4e7a75dfd5f6a83b3304dc56bfa0abfd3fef01540d15edafc9683f9acd2a13b"
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
-
     def "Add and read"() {
         setup:
         def cache = new BlocksMemCache()
@@ -49,10 +48,10 @@ class BlocksMemCacheSpec extends Specification {
         block.transactions = []
 
         when:
-        cache.add(BlockContainer.from(block, objectMapper))
+        cache.add(BlockContainer.from(block))
         def act = cache.read(BlockId.from(hash1)).block()
         then:
-        objectMapper.readValue(act.json, BlockJson) == block
+        Global.objectMapper.readValue(act.json, BlockJson) == block
     }
 
     def "Keeps only configured amount"() {
@@ -70,7 +69,7 @@ class BlocksMemCacheSpec extends Specification {
             block.uncles = []
             block.transactions = []
 
-            cache.add(BlockContainer.from(block, objectMapper))
+            cache.add(BlockContainer.from(block))
         }
 
         def act1 = cache.read(BlockId.from(hash1)).block()

src/test/groovy/io/emeraldpay/dshackle/cache/BlocksRedisCacheSpec.groovy

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.cache
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxId
@@ -44,7 +45,7 @@ class BlocksRedisCacheSpec extends Specification {
     String hash3 = "0x40d15edaff9acdabd2a1c96fd5f683b3300aad34e7015f34def3c56ba8a7ffb5"
     String hash4 = "0xa4e7a75dfd5f6a83b3304dc56bfa0abfd3fef01540d15edafc9683f9acd2a13b"
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def setup() {
         redis = IntegrationTestingCommons.redisConnection()
@@ -94,7 +95,7 @@ class BlocksRedisCacheSpec extends Specification {
         block.uncles = []
 
         when:
-        cache.add(BlockContainer.from(block, objectMapper)).subscribe()
+        cache.add(BlockContainer.from(block)).subscribe()
         def act = cache.read(BlockId.from(hash1)).block()
         then:
         act != null
@@ -112,7 +113,7 @@ class BlocksRedisCacheSpec extends Specification {
         block.uncles = []
 
         when:
-        cache.add(BlockContainer.from(block, objectMapper)).subscribe()
+        cache.add(BlockContainer.from(block)).subscribe()
         def act = cache.read(BlockId.from(hash2)).block()
         then:
         objectMapper.readValue(act.json, BlockJson) == block
@@ -136,7 +137,7 @@ class BlocksRedisCacheSpec extends Specification {
         block.uncles = []
 
         when:
-        cache.add(BlockContainer.from(block, objectMapper)).subscribe()
+        cache.add(BlockContainer.from(block)).subscribe()
         def act = cache.read(BlockId.from(hash2)).block()
         then:
         act != null

src/test/groovy/io/emeraldpay/dshackle/cache/CachesSpec.groovy

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.cache
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.TxContainer
 import io.emeraldpay.dshackle.test.TestingCommons
@@ -33,15 +34,12 @@ class CachesSpec extends Specification {
     String hash1 = "0xd3f34def3c56ba4e701540d15edaff9acd2a1c968a7ff83b3300ab5dfd5f6aab"
     String hash2 = "0x4aabdaff9acd2f30d15e00ab5dfd5f6c56ba4ea1c968a7ff8d3f34de70153b33"
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
-
     def "Evict txes if block updated"() {
         setup:
         TxMemCache txCache = Mock()
         HeightCache heightCache = Mock()
         BlocksMemCache blocksCache = Mock()
         def caches = Caches.newBuilder()
-                .setObjectMapper(objectMapper)
                 .setTxByHash(txCache)
                 .setBlockByHeight(heightCache)
                 .setBlockByHash(blocksCache)
@@ -53,7 +51,7 @@ class CachesSpec extends Specification {
         block1.totalDifficulty = BigInteger.ONE
         block1.timestamp = Instant.now()
         block1.transactions = []
-        block1 = BlockContainer.from(block1, objectMapper)
+        block1 = BlockContainer.from(block1)
 
         def block2 = new BlockJson()
         block2.number = 100
@@ -61,7 +59,7 @@ class CachesSpec extends Specification {
         block2.totalDifficulty = BigInteger.ONE
         block2.timestamp = Instant.now()
         block2.transactions = []
-        block2 = BlockContainer.from(block2, objectMapper)
+        block2 = BlockContainer.from(block2)
 
         when:
         caches.cache(Caches.Tag.LATEST, block1)
@@ -84,7 +82,6 @@ class CachesSpec extends Specification {
         HeightCache heightCache = Mock()
         BlocksMemCache blocksCache = Mock()
         def caches = Caches.newBuilder()
-                .setObjectMapper(objectMapper)
                 .setTxByHash(txCache)
                 .setBlockByHeight(heightCache)
                 .setBlockByHash(blocksCache)
@@ -95,14 +92,14 @@ class CachesSpec extends Specification {
         block1.hash = BlockHash.from(hash1)
         block1.totalDifficulty = BigInteger.ONE
         block1.timestamp = Instant.now()
-        block1 = BlockContainer.from(block1, objectMapper)
+        block1 = BlockContainer.from(block1)
 
         def block2 = new BlockJson()
         block2.number = 100
         block2.hash = BlockHash.from(hash2)
         block2.totalDifficulty = BigInteger.ONE
         block2.timestamp = Instant.now()
-        block2 = BlockContainer.from(block2, objectMapper)
+        block2 = BlockContainer.from(block2)
 
         when:
         caches.cache(Caches.Tag.LATEST, block1)
@@ -125,7 +122,6 @@ class CachesSpec extends Specification {
         HeightCache heightCache = Mock()
         BlocksMemCache blocksCache = Mock()
         def caches = Caches.newBuilder()
-                .setObjectMapper(TestingCommons.objectMapper())
                 .setTxByHash(txCache)
                 .setBlockByHeight(heightCache)
                 .setBlockByHash(blocksCache)
@@ -142,7 +138,7 @@ class CachesSpec extends Specification {
         ]
 
         when:
-        caches.cache(Caches.Tag.REQUESTED, BlockContainer.from(block, objectMapper))
+        caches.cache(Caches.Tag.REQUESTED, BlockContainer.from(block))
         then:
         0 * txCache.add(_)
     }
@@ -153,7 +149,6 @@ class CachesSpec extends Specification {
         HeightCache heightCache = Mock()
         BlocksMemCache blocksCache = Mock()
         def caches = Caches.newBuilder()
-                .setObjectMapper(TestingCommons.objectMapper())
                 .setTxByHash(txCache)
                 .setBlockByHeight(heightCache)
                 .setBlockByHash(blocksCache)
@@ -179,12 +174,12 @@ class CachesSpec extends Specification {
         block.totalDifficulty = BigInteger.ONE
         block.transactions = [tx1, tx2]
         block.timestamp = Instant.now()
-        block = BlockContainer.from(block, objectMapper)
+        block = BlockContainer.from(block)
 
         when:
         caches.cache(Caches.Tag.REQUESTED, block)
         then:
-        1 * txCache.add(TxContainer.from(tx1, objectMapper))
+        1 * txCache.add(TxContainer.from(tx1))
-        1 * txCache.add(TxContainer.from(tx2, objectMapper))
+        1 * txCache.add(TxContainer.from(tx2))
     }
 }

src/test/groovy/io/emeraldpay/dshackle/cache/HeightCacheSpec.groovy

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.cache
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.test.TestingCommons
 import io.infinitape.etherjar.domain.BlockHash
@@ -32,8 +33,6 @@ class HeightCacheSpec extends Specification {
     String hash3 = "0x40d15edaff9acdabd2a1c96fd5f683b3300aad34e7015f34def3c56ba8a7ffb5"
     String hash4 = "0xa4e7a75dfd5f6a83b3304dc56bfa0abfd3fef01540d15edafc9683f9acd2a13b"
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
-
     def "Add and read"() {
         setup:
         def cache = new HeightCache()
@@ -45,7 +44,7 @@ class HeightCacheSpec extends Specification {
             block.hash = BlockHash.from(hash)
             block.totalDifficulty = BigInteger.ONE
             block.timestamp = Instant.now()
-            cache.add(BlockContainer.from(block, objectMapper))
+            cache.add(BlockContainer.from(block))
         }
 
         def act1 = cache.read(100).block()
@@ -71,7 +70,7 @@ class HeightCacheSpec extends Specification {
             block.hash = BlockHash.from(hash)
             block.totalDifficulty = BigInteger.ONE
             block.timestamp = Instant.now()
-            cache.add(BlockContainer.from(block, objectMapper))
+            cache.add(BlockContainer.from(block))
         }
 
         def act1 = cache.read(100).block()

src/test/groovy/io/emeraldpay/dshackle/cache/TxMemCacheSpec.groovy

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.cache
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxContainer
@@ -37,7 +38,7 @@ class TxMemCacheSpec extends Specification {
     String hash3 = "0x40d15edaff9acdabd2a1c96fd5f683b3300aad34e7015f34def3c56ba8a7ffb5"
     String hash4 = "0xa4e7a75dfd5f6a83b3304dc56bfa0abfd3fef01540d15edafc9683f9acd2a13b"
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def "Add and read"() {
         setup:
@@ -48,7 +49,7 @@ class TxMemCacheSpec extends Specification {
         tx.blockNumber = 100
 
         when:
-        cache.add(TxContainer.from(tx, objectMapper))
+        cache.add(TxContainer.from(tx))
         def act = cache.read(TxId.from(hash1)).block()
         then:
         objectMapper.readValue(act.json, TransactionJson.class) == tx
@@ -64,7 +65,7 @@ class TxMemCacheSpec extends Specification {
             tx.blockNumber = 100 + i
             tx.blockHash = BlockHash.from(hash)
             tx.hash = TransactionId.from(hash)
-            cache.add(TxContainer.from(tx, objectMapper))
+            cache.add(TxContainer.from(tx))
         }
 
         def act1 = cache.read(TxId.from(hash1)).block()
@@ -88,14 +89,14 @@ class TxMemCacheSpec extends Specification {
             tx.blockNumber = 100
             tx.blockHash = BlockHash.from(hash1)
             tx.hash = TransactionId.from(hash)
-            cache.add(TxContainer.from(tx, objectMapper))
+            cache.add(TxContainer.from(tx))
         }
         [hash3, hash4].eachWithIndex { String hash, int i ->
             def tx = new TransactionJson()
             tx.blockNumber = 101
             tx.blockHash = BlockHash.from(hash2)
             tx.hash = TransactionId.from(hash)
-            cache.add(TxContainer.from(tx, objectMapper))
+            cache.add(TxContainer.from(tx))
         }
 
         cache.evict(BlockId.from(hash1))
@@ -122,14 +123,14 @@ class TxMemCacheSpec extends Specification {
             tx.blockNumber = 100
             tx.blockHash = BlockHash.from(hash1)
             tx.hash = TransactionId.from(hash)
-            cache.add(TxContainer.from(tx, objectMapper))
+            cache.add(TxContainer.from(tx))
         }
         [hash3, hash4].eachWithIndex{ String hash, int i ->
             def tx = new TransactionJson()
             tx.blockNumber = 100
             tx.blockHash = BlockHash.from(hash2)
             tx.hash = TransactionId.from(hash)
-            cache.add(TxContainer.from(tx, objectMapper))
+            cache.add(TxContainer.from(tx))
         }
 
         def block = new BlockJson<TransactionRefJson>()
@@ -142,7 +143,7 @@ class TxMemCacheSpec extends Specification {
                 new TransactionRefJson(TransactionId.from(hash2)),
         ]
 
-        cache.evict(BlockContainer.from(block, objectMapper))
+        cache.evict(BlockContainer.from(block))
 
         def act1 = cache.read(TxId.from(hash1)).block()
         def act2 = cache.read(TxId.from(hash2)).block()

src/test/groovy/io/emeraldpay/dshackle/cache/TxRedisCacheSpec.groovy

@@ -15,7 +15,8 @@
  */
 package io.emeraldpay.dshackle.cache
 
-
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.data.TxContainer
@@ -49,7 +50,7 @@ class TxRedisCacheSpec extends Specification {
     String hash4 = "0xa4e7a75dfd5f6a83b3304dc56bfa0abfd3fef01540d15edafc9683f9acd2a13b"
     TxRedisCache cache
 
-    def objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def setup() {
         StatefulRedisConnection<String, byte[]> redis = IntegrationTestingCommons.redisConnection()
@@ -96,7 +97,7 @@ class TxRedisCacheSpec extends Specification {
         tx.nonce = 0
 
         when:
-        cache.add(TxContainer.from(tx, objectMapper), BlockContainer.from(block, objectMapper)).subscribe()
+        cache.add(TxContainer.from(tx), BlockContainer.from(block)).subscribe()
         def act = cache.read(TxId.from(hash1)).block()
         then:
         act != null
@@ -121,7 +122,7 @@ class TxRedisCacheSpec extends Specification {
         tx.nonce = 0
 
         when:
-        cache.add(TxContainer.from(tx, objectMapper), BlockContainer.from(block, objectMapper)).subscribe()
+        cache.add(TxContainer.from(tx), BlockContainer.from(block)).subscribe()
         def act = cache.read(TxId.from(tx.hash)).block()
         then:
         act != null
@@ -162,7 +163,7 @@ class TxRedisCacheSpec extends Specification {
             tx.hash = TransactionId.from(hash)
             tx.value = Wei.ofEthers(i)
             tx.nonce = 0
-            cache.add(TxContainer.from(tx, objectMapper), BlockContainer.from(block1, objectMapper)).subscribe()
+            cache.add(TxContainer.from(tx), BlockContainer.from(block1)).subscribe()
         }
         [hash3, hash4].eachWithIndex{ String hash, int i ->
             def tx = new TransactionJson()
@@ -171,11 +172,11 @@ class TxRedisCacheSpec extends Specification {
             tx.hash = TransactionId.from(hash)
             tx.value = Wei.ofEthers(i)
             tx.nonce = 0
-            cache.add(TxContainer.from(tx, objectMapper), BlockContainer.from(block2, objectMapper)).subscribe()
+            cache.add(TxContainer.from(tx), BlockContainer.from(block2)).subscribe()
         }
 
 
-        cache.evict(BlockContainer.from(block1, objectMapper)).subscribe()
+        cache.evict(BlockContainer.from(block1)).subscribe()
 
         def act1 = cache.read(TxId.from(hash1)).block()
         def act2 = cache.read(TxId.from(hash2)).block()

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

@@ -42,7 +42,7 @@ class ProxyServerSpec extends Specification {
 
         ProxyServer server = new ProxyServer(
                 new ProxyConfig(),
-                new ReadRpcJson(TestingCommons.objectMapper()),
+                new ReadRpcJson(),
                 writeRpcJson,
                 nativeCall,
                 new TlsSetup(TestingCommons.fileResolver())

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

@@ -22,7 +22,7 @@ import spock.lang.Specification
 
 class ReadRpcJsonSpec extends Specification {
 
-    ReadRpcJson reader = new ReadRpcJson(TestingCommons.objectMapper())
+    ReadRpcJson reader = new ReadRpcJson()
 
     def "Get first symbol"() {
         expect:

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

@@ -26,7 +26,7 @@ import java.time.Duration
 
 class WriteRpcJsonSpec extends Specification {
 
-    WriteRpcJson writer = new WriteRpcJson(TestingCommons.objectMapper())
+    WriteRpcJson writer = new WriteRpcJson()
 
     def "Write empty array"() {
         when:

src/test/groovy/io/emeraldpay/dshackle/quorum/BroadcastQuorumSpec.groovy

@@ -16,6 +16,8 @@
  */
 package io.emeraldpay.dshackle.quorum
 
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.test.TestingCommons
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.Upstream
@@ -25,11 +27,11 @@ import spock.lang.Specification
 
 class BroadcastQuorumSpec extends Specification {
 
-    def objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def "Resolved with first after 3 tries"() {
         setup:
-        def q = Spy(new BroadcastQuorum(objectMapper, 3))
+        def q = Spy(new BroadcastQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)
@@ -61,7 +63,7 @@ class BroadcastQuorumSpec extends Specification {
 
     def "Remembers first response"() {
         setup:
-        def q = Spy(new BroadcastQuorum(objectMapper, 3))
+        def q = Spy(new BroadcastQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)

src/test/groovy/io/emeraldpay/dshackle/quorum/NonEmptyQuorumSpec.groovy

@@ -25,7 +25,7 @@ class NonEmptyQuorumSpec extends Specification {
 
     def "Fail if too many errors"() {
         setup:
-        def q = Spy(new NonEmptyQuorum(TestingCommons.objectMapper(), 3))
+        def q = Spy(new NonEmptyQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)
@@ -57,7 +57,7 @@ class NonEmptyQuorumSpec extends Specification {
 
     def "Fail first if not error"() {
         setup:
-        def q = Spy(new NonEmptyQuorum(TestingCommons.objectMapper(), 3))
+        def q = Spy(new NonEmptyQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)
@@ -77,7 +77,7 @@ class NonEmptyQuorumSpec extends Specification {
 
     def "Fail second if first is error"() {
         setup:
-        def q = Spy(new NonEmptyQuorum(TestingCommons.objectMapper(), 3))
+        def q = Spy(new NonEmptyQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)
@@ -104,7 +104,7 @@ class NonEmptyQuorumSpec extends Specification {
 
     def "Fail second if first is null"() {
         setup:
-        def q = Spy(new NonEmptyQuorum(TestingCommons.objectMapper(), 3))
+        def q = Spy(new NonEmptyQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)

src/test/groovy/io/emeraldpay/dshackle/quorum/NonceQuorumSpec.groovy

@@ -16,6 +16,8 @@
  */
 package io.emeraldpay.dshackle.quorum
 
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.test.TestingCommons
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.Upstream
@@ -25,11 +27,11 @@ import spock.lang.Specification
 
 class NonceQuorumSpec extends Specification {
 
-    def objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def "Gets max value"() {
         setup:
-        def q = Spy(new NonceQuorum(objectMapper, 3))
+        def q = Spy(new NonceQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)
@@ -61,7 +63,7 @@ class NonceQuorumSpec extends Specification {
 
     def "Ignores errors"() {
         setup:
-        def q = Spy(new NonceQuorum(objectMapper, 3))
+        def q = Spy(new NonceQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)
@@ -99,7 +101,7 @@ class NonceQuorumSpec extends Specification {
 
     def "Fail if too many errors"() {
         setup:
-        def q = Spy(new NonceQuorum(objectMapper, 3))
+        def q = Spy(new NonceQuorum(3))
         def upstream1 = Stub(Upstream)
         def upstream2 = Stub(Upstream)
         def upstream3 = Stub(Upstream)

src/test/groovy/io/emeraldpay/dshackle/quorum/QuorumRpcReaderSpec.groovy

@@ -99,7 +99,7 @@ class QuorumRpcReaderSpec extends Specification {
         def apis = new FilteredApis(
                 [up], Selector.empty
         )
-        def reader = new QuorumRpcReader(apis, new NonEmptyQuorum(TestingCommons.objectMapper(), 3))
+        def reader = new QuorumRpcReader(apis, new NonEmptyQuorum(3))
 
         when:
         def act = reader.read(new JsonRpcRequest("eth_test", []))
@@ -129,7 +129,7 @@ class QuorumRpcReaderSpec extends Specification {
         def apis = new FilteredApis(
                 [up], Selector.empty
         )
-        def reader = new QuorumRpcReader(apis, new NonEmptyQuorum(TestingCommons.objectMapper(), 3))
+        def reader = new QuorumRpcReader(apis, new NonEmptyQuorum(3))
 
         when:
         def act = reader.read(new JsonRpcRequest("eth_test", []))
@@ -159,7 +159,7 @@ class QuorumRpcReaderSpec extends Specification {
         def apis = new FilteredApis(
                 [up], Selector.empty
         )
-        def reader = new QuorumRpcReader(apis, new NonEmptyQuorum(TestingCommons.objectMapper(), 3))
+        def reader = new QuorumRpcReader(apis, new NonEmptyQuorum(3))
 
         when:
         def act = reader.read(new JsonRpcRequest("eth_test", []))
@@ -189,7 +189,7 @@ class QuorumRpcReaderSpec extends Specification {
         def apis = new FilteredApis(
                 [up], Selector.empty
         )
-        def reader = new QuorumRpcReader(apis, new NonEmptyQuorum(TestingCommons.objectMapper(), 3))
+        def reader = new QuorumRpcReader(apis, new NonEmptyQuorum(3))
 
         when:
         def act = reader.read(new JsonRpcRequest("eth_test", []))

src/test/groovy/io/emeraldpay/dshackle/quorum/ValueAwareQuorumSpec.groovy

@@ -62,7 +62,7 @@ class ValueAwareQuorumSpec extends Specification {
 
     class ValueAwareQuorumImpl extends ValueAwareQuorum {
         ValueAwareQuorumImpl() {
-            super(TestingCommons.objectMapper(), Object)
+            super(Object)
         }
 
         @Override

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

@@ -16,8 +16,9 @@
  */
 package io.emeraldpay.dshackle.rpc
 
-
+import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.api.proto.BlockchainOuterClass
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.quorum.BroadcastQuorum
 import io.emeraldpay.dshackle.quorum.QuorumReaderFactory
 import io.emeraldpay.dshackle.quorum.QuorumRpcReader
@@ -45,7 +46,7 @@ import java.util.concurrent.TimeoutException
 
 class NativeCallSpec extends Specification {
 
-    def objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def "Tries router first"() {
         def routedApi = Mock(Reader) {
@@ -56,7 +57,7 @@ class NativeCallSpec extends Specification {
         }
         def upstreams = Stub(MultistreamHolder)
 
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
         def ctx = new NativeCall.CallContext<NativeCall.ParsedCallDetails>(
                 1, upstream, Selector.empty, new AlwaysQuorum(),
                 new NativeCall.ParsedCallDetails("eth_test", [])
@@ -77,7 +78,7 @@ class NativeCallSpec extends Specification {
         }
         def upstreams = Stub(MultistreamHolder)
 
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
         def ctx = new NativeCall.CallContext<NativeCall.ParsedCallDetails>(
                 15, upstream, Selector.empty, new AlwaysQuorum(),
                 new NativeCall.ParsedCallDetails("eth_test", [])
@@ -100,7 +101,7 @@ class NativeCallSpec extends Specification {
         setup:
         def quorum = new AlwaysQuorum()
 
-        def nativeCall = new NativeCall(Stub(MultistreamHolder), TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(Stub(MultistreamHolder))
         nativeCall.quorumReaderFactory = Mock(QuorumReaderFactory) {
             1 * create(_, _) >> Mock(Reader) {
                 1 * read(_) >> Mono.just(new QuorumRpcReader.Result("\"foo\"".bytes, 1))
@@ -120,7 +121,7 @@ class NativeCallSpec extends Specification {
         setup:
         def quorum = new AlwaysQuorum()
 
-        def nativeCall = new NativeCall(Stub(MultistreamHolder), TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(Stub(MultistreamHolder))
         nativeCall.quorumReaderFactory = Mock(QuorumReaderFactory) {
             1 * create(_, _) >> Mock(Reader) {
                 1 * read(_) >> Mono.empty()
@@ -140,7 +141,7 @@ class NativeCallSpec extends Specification {
     def "Packs call exception into response with id"() {
         setup:
         def upstreams = Stub(MultistreamHolder)
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
         when:
         def resp = nativeCall.processException(new NativeCall.CallFailure(5, new IllegalArgumentException("test test")))
         then:
@@ -157,7 +158,7 @@ class NativeCallSpec extends Specification {
     def "Packs unknown exception into response"() {
         setup:
         def upstreams = Stub(MultistreamHolder)
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
         when:
         def resp = nativeCall.processException(new IllegalArgumentException("test test"))
         then:
@@ -173,7 +174,7 @@ class NativeCallSpec extends Specification {
     def "Builds normal response"() {
         setup:
         def upstreams = Stub(MultistreamHolder)
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
         def json = [jsonrpc:"2.0", id:1, result: "foo"]
 
         when:
@@ -189,7 +190,7 @@ class NativeCallSpec extends Specification {
     def "Returns error for invalid chain"() {
         setup:
         def upstreams = Stub(MultistreamHolder)
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
 
         def req = BlockchainOuterClass.NativeCallRequest.newBuilder()
             .setChainValue(0)
@@ -212,7 +213,7 @@ class NativeCallSpec extends Specification {
     def "Returns error for unsupported chain"() {
         setup:
         def upstreams = Mock(MultistreamHolder)
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
 
         def req = BlockchainOuterClass.NativeCallRequest.newBuilder()
                 .setChainValue(Chain.TESTNET_MORDEN.id)
@@ -238,7 +239,7 @@ class NativeCallSpec extends Specification {
     def "Calls cache before remote"() {
         setup:
         def upstreams = Stub(MultistreamHolder)
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
         def api = TestingCommons.api()
         def upstream = TestingCommons.aggregatedUpstream(api)
 
@@ -257,7 +258,7 @@ class NativeCallSpec extends Specification {
     def "Uses cached value"() {
         setup:
         def upstreams = Stub(MultistreamHolder)
-        def nativeCall = new NativeCall(upstreams, TestingCommons.objectMapper())
+        def nativeCall = new NativeCall(upstreams)
         def upstream = TestingCommons.aggregatedUpstream(TestingCommons.api())
 
         def ctx = new NativeCall.CallContext<NativeCall.ParsedCallDetails>(10,

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

@@ -20,6 +20,7 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import com.google.protobuf.ByteString
 import io.emeraldpay.api.proto.BlockchainOuterClass
 import io.emeraldpay.api.proto.Common
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.test.EthereumUpstreamMock
 import io.emeraldpay.dshackle.test.TestingCommons
@@ -38,7 +39,7 @@ import java.time.Instant
 
 class StreamHeadSpec extends Specification {
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def "Errors on unavailable chain"() {
         setup:
@@ -86,9 +87,9 @@ class StreamHeadSpec extends Specification {
         )
         then:
         StepVerifier.create(flux.take(2))
-                .then { upstream.nextBlock(BlockContainer.from(blocks[0], objectMapper)) }
+                .then { upstream.nextBlock(BlockContainer.from(blocks[0])) }
                 .expectNext(heads[0])
-                .then { upstream.nextBlock(BlockContainer.from(blocks[1], objectMapper)) }
+                .then { upstream.nextBlock(BlockContainer.from(blocks[1])) }
                 .expectNext(heads[1])
                 .expectComplete()
                 .verify(Duration.ofSeconds(1))

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

@@ -15,8 +15,10 @@
  */
 package io.emeraldpay.dshackle.rpc
 
+import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.api.proto.BlockchainOuterClass
 import io.emeraldpay.api.proto.Common
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.test.TestingCommons
@@ -38,11 +40,12 @@ import java.time.Instant
 class TrackBitcoinAddressSpec extends Specification {
 
     String hash1 = "0xa0e65cbc1b52a8ca60562112c6060552d882f16f34a9dba2ccdc05c0a6a27c22"
+    ObjectMapper objectMapper = Global.objectMapper
 
     def "Correct sum from multiple"() {
         setup:
         def json = this.class.getClassLoader().getResourceAsStream("bitcoin/unspent-one-addr.json")
-        def unspents = TestingCommons.objectMapper().readValue(json, List)
+        def unspents = objectMapper.readValue(json, List)
         TrackBitcoinAddress track = new TrackBitcoinAddress(Stub(MultistreamHolder))
         when:
         def total = track.getTotal(Chain.BITCOIN, ["1K7xkspJg7DDKNwzXgoRSDCUxiFsRegsSK"], unspents)
@@ -57,7 +60,7 @@ class TrackBitcoinAddressSpec extends Specification {
     def "Correct sum when other addresses"() {
         setup:
         def json = this.class.getClassLoader().getResourceAsStream("bitcoin/unspent-two-addr.json")
-        def unspents = TestingCommons.objectMapper().readValue(json, List)
+        def unspents = objectMapper.readValue(json, List)
         TrackBitcoinAddress track = new TrackBitcoinAddress(Stub(MultistreamHolder))
         when:
         def total = track.getTotal(Chain.BITCOIN, ["1K7xkspJg7DDKNwzXgoRSDCUxiFsRegsSK"], unspents)
@@ -72,7 +75,7 @@ class TrackBitcoinAddressSpec extends Specification {
     def "Sum for two addresses"() {
         setup:
         def json = this.class.getClassLoader().getResourceAsStream("bitcoin/unspent-two-addr.json")
-        def unspents = TestingCommons.objectMapper().readValue(json, List)
+        def unspents = objectMapper.readValue(json, List)
         TrackBitcoinAddress track = new TrackBitcoinAddress(Stub(MultistreamHolder))
         when:
         def total = track.getTotal(Chain.BITCOIN, ["1K7xkspJg7DDKNwzXgoRSDCUxiFsRegsSK", "35hK24tcLEWcgNA4JxpvbkNkoAcDGqQPsP"], unspents).sort { it.address.address }
@@ -107,7 +110,7 @@ class TrackBitcoinAddressSpec extends Specification {
     def "Zero for unknown address"() {
         setup:
         def json = this.class.getClassLoader().getResourceAsStream("bitcoin/unspent-two-addr.json")
-        def unspents = TestingCommons.objectMapper().readValue(json, List)
+        def unspents = objectMapper.readValue(json, List)
         TrackBitcoinAddress track = new TrackBitcoinAddress(Stub(MultistreamHolder))
         when:
         def total = track.getTotal(Chain.BITCOIN, ["16rCmCmbuWDhPjWTrpQGaU3EPdZF7MTdUk", "1K7xkspJg7DDKNwzXgoRSDCUxiFsRegsSK"], unspents).sort { it.address.address }

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

@@ -108,7 +108,7 @@ class TrackEthereumAddressSpec extends Specification {
         StepVerifier.create(flux)
                 .expectNext(exp1).as("First block")
                 .then {
-                    upstreamMock.nextBlock(BlockContainer.from(block2, TestingCommons.objectMapper()))
+                    upstreamMock.nextBlock(BlockContainer.from(block2))
                 }
                 .expectNext(exp2).as("Second block")
                 .thenCancel()

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

@@ -103,7 +103,7 @@ class TrackEthereumTxSpec extends Specification {
 
         apiMock.answer("eth_getTransactionByHash", [txId], txJson)
         apiMock.answer("eth_getBlockByHash", [blockJson.hash.toHex(), false], blockJson)
-        upstreamMock.nextBlock(BlockContainer.from(blockHeadJson, TestingCommons.objectMapper()))
+        upstreamMock.nextBlock(BlockContainer.from(blockHeadJson))
 
         when:
         def flux = trackTx.subscribe(req)
@@ -301,7 +301,7 @@ class TrackEthereumTxSpec extends Specification {
 
         upstreamMock.blocks = Flux.fromIterable(blocks)
                 .map { block ->
-                    BlockContainer.from(block, TestingCommons.objectMapper())
+                    BlockContainer.from(block)
                 }
 
         when:

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

@@ -19,6 +19,7 @@ package io.emeraldpay.dshackle.test
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.google.protobuf.ByteString
 import io.emeraldpay.api.proto.BlockchainOuterClass
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.reader.Reader
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcResponse
@@ -37,12 +38,11 @@ class EthereumApiMock implements Reader<JsonRpcRequest, JsonRpcResponse> {
 
     private static final Logger log = LoggerFactory.getLogger(this)
     List<PredefinedResponse> predefined = []
-    private ObjectMapper objectMapper
+    private final ObjectMapper objectMapper = Global.objectMapper
 
     String id = "default"
 
-    EthereumApiMock(@NotNull ObjectMapper objectMapper) {
+    EthereumApiMock() {
-        this.objectMapper = objectMapper
     }
 
     EthereumApiMock answerOnce(@NotNull String method, List<Object> params, Object result) {

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

@@ -41,8 +41,8 @@ class EthereumUpstreamMock extends EthereumUpstream {
 
     static CallMethods allMethods() {
         new AggregatedCallMethods([
-                new DefaultEthereumMethods(TestingCommons.objectMapper(), Chain.ETHEREUM),
+                new DefaultEthereumMethods(Chain.ETHEREUM),
-                new DefaultBitcoinMethods(TestingCommons.objectMapper()),
+                new DefaultBitcoinMethods(),
                 new DirectCallMethods(["eth_test"])
         ])
     }
@@ -62,7 +62,7 @@ class EthereumUpstreamMock extends EthereumUpstream {
     EthereumUpstreamMock(@NotNull String id, @NotNull Chain chain, @NotNull Reader<JsonRpcRequest, JsonRpcResponse> api, CallMethods methods) {
         super(id, chain, api, null,
                 UpstreamsConfig.Options.getDefaults(), new QuorumForLabels.QuorumItem(1, new UpstreamsConfig.Labels()),
-                methods, TestingCommons.objectMapper())
+                methods)
         setLag(0)
         setStatus(UpstreamAvailability.OK)
         start()

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

@@ -47,7 +47,7 @@ class MultistreamHolderMock implements MultistreamHolder {
                 if (up instanceof EthereumMultistream) {
                     upstreams[chain] = up
                 } else if (up instanceof EthereumUpstream) {
-                    upstreams[chain] = new EthereumMultistreamMock(chain, [up as EthereumUpstream], Caches.default(TestingCommons.objectMapper()))
+                    upstreams[chain] = new EthereumMultistreamMock(chain, [up as EthereumUpstream], Caches.default())
                 } else {
                     throw new IllegalArgumentException("Unsupported upstream type ${up.class}")
                 }
@@ -56,7 +56,7 @@ class MultistreamHolderMock implements MultistreamHolder {
                 if (up instanceof BitcoinMultistream) {
                     upstreams[chain] = up
                 } else if (up instanceof BitcoinUpstream) {
-                    upstreams[chain] = new BitcoinMultistream(chain, [up as BitcoinUpstream], Caches.default(TestingCommons.objectMapper()), TestingCommons.objectMapper())
+                    upstreams[chain] = new BitcoinMultistream(chain, [up as BitcoinUpstream], Caches.default())
                 } else {
                     throw new IllegalArgumentException("Unsupported upstream type ${up.class}")
                 }
@@ -86,7 +86,7 @@ class MultistreamHolderMock implements MultistreamHolder {
     @Override
     DefaultEthereumMethods getDefaultMethods(@NotNull Chain chain) {
         if (target[chain] == null) {
-            DefaultEthereumMethods targets = new DefaultEthereumMethods(TestingCommons.objectMapper(), chain)
+            DefaultEthereumMethods targets = new DefaultEthereumMethods(chain)
             target[chain] = targets
         }
         return target[chain]
@@ -102,7 +102,7 @@ class MultistreamHolderMock implements MultistreamHolder {
         EthereumReader customReader = null
 
         EthereumMultistreamMock(@NotNull Chain chain, @NotNull List<EthereumUpstream> upstreams, @NotNull Caches caches) {
-            super(chain, upstreams, caches, TestingCommons.objectMapper())
+            super(chain, upstreams, caches)
         }
 
         @Override

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

@@ -21,6 +21,7 @@ import com.fasterxml.jackson.databind.DeserializationFeature
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.module.SimpleModule
 import io.emeraldpay.dshackle.FileResolver
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.cache.Caches
 import io.emeraldpay.dshackle.cache.CachesFactory
 import io.emeraldpay.dshackle.config.CacheConfig
@@ -38,27 +39,9 @@ import java.text.SimpleDateFormat
 
 class TestingCommons {
 
-    static ObjectMapper objectMapper() {
-        def module = new SimpleModule("EmeraldDShackle", new Version(1, 0, 0, null, null, null))
-
-        def objectMapper = new ObjectMapper()
-        objectMapper.registerModule(module)
-        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
-        objectMapper
-                .setDateFormat(new SimpleDateFormat("yyyy-MM-dd\'T\'HH:mm:ss.SSS"))
-                .setTimeZone(TimeZone.getTimeZone("UTC"))
-
-        return objectMapper
-    }
-
     static EthereumApiMock api() {
-        return new EthereumApiMock(objectMapper())
+        return new EthereumApiMock()
     }
-
-    static JacksonRpcConverter rpcConverter() {
-        return new JacksonRpcConverter(objectMapper())
-    }
-
     static EthereumUpstreamMock upstream(Reader<JsonRpcRequest, JsonRpcResponse> api) {
         return new EthereumUpstreamMock(Chain.ETHEREUM, api)
     }
@@ -76,13 +59,13 @@ class TestingCommons {
     }
 
     static Multistream aggregatedUpstream(EthereumUpstream up) {
-        return new EthereumMultistream(Chain.ETHEREUM, [up], Caches.default(objectMapper()), objectMapper()).tap {
+        return new EthereumMultistream(Chain.ETHEREUM, [up], Caches.default()).tap {
             start()
         }
     }
 
     static CachesFactory emptyCaches() {
-        return new CachesFactory(objectMapper(), new CacheConfig())
+        return new CachesFactory(new CacheConfig())
     }
 
     static FileResolver fileResolver() {

src/test/groovy/io/emeraldpay/dshackle/upstream/CurrentMultistreamHolderSpec.groovy

@@ -25,7 +25,7 @@ class CurrentMultistreamHolderSpec extends Specification {
 
     def "add upstream"() {
         setup:
-        def current = new CurrentMultistreamHolder(TestingCommons.objectMapper(), TestingCommons.emptyCaches())
+        def current = new CurrentMultistreamHolder(TestingCommons.emptyCaches())
         def up = new EthereumUpstreamMock("test", Chain.ETHEREUM, TestingCommons.api())
         when:
         current.update(new UpstreamChange(Chain.ETHEREUM, up, UpstreamChange.ChangeType.ADDED))
@@ -36,7 +36,7 @@ class CurrentMultistreamHolderSpec extends Specification {
 
     def "add multiple upstreams"() {
         setup:
-        def current = new CurrentMultistreamHolder(TestingCommons.objectMapper(), TestingCommons.emptyCaches())
+        def current = new CurrentMultistreamHolder(TestingCommons.emptyCaches())
         def up1 = new EthereumUpstreamMock("test1", Chain.ETHEREUM, TestingCommons.api())
         def up2 = new EthereumUpstreamMock("test2", Chain.ETHEREUM_CLASSIC, TestingCommons.api())
         def up3 = new EthereumUpstreamMock("test3", Chain.ETHEREUM, TestingCommons.api())
@@ -52,7 +52,7 @@ class CurrentMultistreamHolderSpec extends Specification {
 
     def "remove upstream"() {
         setup:
-        def current = new CurrentMultistreamHolder(TestingCommons.objectMapper(), TestingCommons.emptyCaches())
+        def current = new CurrentMultistreamHolder(TestingCommons.emptyCaches())
         def up1 = new EthereumUpstreamMock("test1", Chain.ETHEREUM, TestingCommons.api())
         def up2 = new EthereumUpstreamMock("test2", Chain.ETHEREUM_CLASSIC, TestingCommons.api())
         def up3 = new EthereumUpstreamMock("test3", Chain.ETHEREUM, TestingCommons.api())
@@ -70,7 +70,7 @@ class CurrentMultistreamHolderSpec extends Specification {
 
     def "available after adding"() {
         setup:
-        def current = new CurrentMultistreamHolder(TestingCommons.objectMapper(), TestingCommons.emptyCaches())
+        def current = new CurrentMultistreamHolder(TestingCommons.emptyCaches())
         def up1 = new EthereumUpstreamMock("test1", Chain.ETHEREUM, TestingCommons.api())
 
         when:

src/test/groovy/io/emeraldpay/dshackle/upstream/FilteredApisSpec.groovy

@@ -16,7 +16,6 @@
  */
 package io.emeraldpay.dshackle.upstream
 
-import io.emeraldpay.dshackle.cache.Caches
 import io.emeraldpay.dshackle.config.UpstreamsConfig
 import io.emeraldpay.dshackle.startup.QuorumForLabels
 import io.emeraldpay.dshackle.test.EthereumApiStub
@@ -25,7 +24,6 @@ import io.emeraldpay.dshackle.upstream.calls.DefaultEthereumMethods
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumUpstream
 import io.emeraldpay.dshackle.upstream.ethereum.EthereumWsFactory
 import io.emeraldpay.grpc.Chain
-import io.infinitape.etherjar.rpc.ReactorRpcClient
 import reactor.test.StepVerifier
 import spock.lang.Retry
 import spock.lang.Specification
@@ -34,9 +32,7 @@ import java.time.Duration
 
 class FilteredApisSpec extends Specification {
 
-    def rpcClient = Stub(ReactorRpcClient)
+    def ethereumTargets = new DefaultEthereumMethods(Chain.ETHEREUM)
-    def objectMapper = TestingCommons.objectMapper()
-    def ethereumTargets = new DefaultEthereumMethods(objectMapper, Chain.ETHEREUM)
 
     def "Verifies labels"() {
         setup:
@@ -55,7 +51,7 @@ class FilteredApisSpec extends Specification {
                     (EthereumWsFactory) null,
                     new UpstreamsConfig.Options(),
                     new QuorumForLabels.QuorumItem(1, UpstreamsConfig.Labels.fromMap(it)),
-                    ethereumTargets, TestingCommons.objectMapper()
+                    ethereumTargets
             )
         }
         def matcher = new Selector.LabelMatcher("test", ["foo"])

src/test/groovy/io/emeraldpay/dshackle/upstream/MultistreamSpec.groovy

@@ -31,7 +31,7 @@ class MultistreamSpec extends Specification {
         setup:
         def up1 = new EthereumUpstreamMock("test1", Chain.ETHEREUM, TestingCommons.api(), new DirectCallMethods(["eth_test1", "eth_test2"]))
         def up2 = new EthereumUpstreamMock("test1", Chain.ETHEREUM, TestingCommons.api(), new DirectCallMethods(["eth_test2", "eth_test3"]))
-        def aggr = new EthereumMultistream(Chain.ETHEREUM, [up1, up2], Caches.default(TestingCommons.objectMapper()), TestingCommons.objectMapper())
+        def aggr = new EthereumMultistream(Chain.ETHEREUM, [up1, up2], Caches.default())
         when:
         aggr.onUpstreamsUpdated()
         def act = aggr.getMethods()

src/test/groovy/io/emeraldpay/dshackle/upstream/bitcoin/BitcoinRpcHeadSpec.groovy

@@ -86,7 +86,7 @@ class BitcoinRpcHeadSpec extends Specification {
             _ * read(new JsonRpcRequest("getblock", [hash1])) >> Mono.just(new JsonRpcResponse(block1.bytes, null))
             _ * read(new JsonRpcRequest("getblock", [hash2])) >> Mono.just(new JsonRpcResponse(block2.bytes, null))
         }
-        BitcoinRpcHead head = new BitcoinRpcHead(api, new ExtractBlock(TestingCommons.objectMapper()), Duration.ofMillis(200))
+        BitcoinRpcHead head = new BitcoinRpcHead(api, new ExtractBlock(), Duration.ofMillis(200))
 
         when:
         def act = head.flux.take(2)

src/test/groovy/io/emeraldpay/dshackle/upstream/bitcoin/ExtractBlockSpec.groovy

@@ -20,7 +20,7 @@ import spock.lang.Specification
 
 class ExtractBlockSpec extends Specification {
 
-    ExtractBlock extractBlock = new ExtractBlock(TestingCommons.objectMapper())
+    ExtractBlock extractBlock = new ExtractBlock()
 
     def "Extract standard block"() {
         setup:

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/DefaultEthereumHeadSpec.groovy

@@ -17,6 +17,7 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockContainer
 import io.emeraldpay.dshackle.test.TestingCommons
 import io.infinitape.etherjar.domain.BlockHash
@@ -30,17 +31,16 @@ import java.time.Instant
 class DefaultEthereumHeadSpec extends Specification {
 
     DefaultEthereumHead head = new DefaultEthereumHead()
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def blocks = (10L..20L).collect { i ->
         BlockContainer.from(
-                new BlockJson().with {
+                new BlockJson().tap {
                     it.number = 10000L + i
                     it.hash = BlockHash.from("0x3ec2ebf5d0ec474d0ac6bc50d2770d8409ad76e119968e7919f85d5ec89152" + i)
                     it.totalDifficulty = 11 * i
                     it.timestamp = Instant.now()
-                    return it
+                })
-                }, objectMapper)
     }
 
     def "Starts to follow"() {
@@ -90,13 +90,12 @@ class DefaultEthereumHeadSpec extends Specification {
     def "Ignores less difficult"() {
         when:
         def block3less = BlockContainer.from(
-                new BlockJson().with {
+                new BlockJson().tap {
                     it.number = blocks[3].height
                     it.hash = BlockHash.from(blocks[3].hash.value)
                     it.totalDifficulty = blocks[3].difficulty - 1
                     it.timestamp = Instant.now()
-                    return it
+                })
-                }, objectMapper)
         head.follow(Flux.just(blocks[0], blocks[3], block3less))
         def act = head.flux
         then:
@@ -109,13 +108,12 @@ class DefaultEthereumHeadSpec extends Specification {
     def "Replaces with more difficult"() {
         when:
         def block3less = BlockContainer.from(
-                new BlockJson().with {
+                new BlockJson().tap {
                     it.number = blocks[3].height
                     it.hash = BlockHash.from(blocks[3].hash.value)
                     it.totalDifficulty = blocks[3].difficulty + 1
                     it.timestamp = Instant.now()
-                    return it
+                })
-                }, objectMapper)
         head.follow(Flux.just(blocks[0], blocks[3], block3less))
         def act = head.flux
         then:

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/EthereumFullBlocksReaderSpec.groovy

@@ -16,6 +16,7 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.cache.BlocksMemCache
 import io.emeraldpay.dshackle.cache.TxMemCache
 import io.emeraldpay.dshackle.data.BlockContainer
@@ -39,7 +40,7 @@ class EthereumFullBlocksReaderSpec extends Specification {
     String hash3 = "0xa4e7a75dfd5f6a83b3304dc56bfa0abfd3fef01540d15edafc9683f9acd2a13b"
     String hash4 = "0xd3f34def3c56ba4e701540d15edaff9acd2a1c968a7ff83b3300ab5dfd5f6aab"
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def tx1 = new TransactionJson().with {
         it.blockNumber = 100
@@ -113,15 +114,15 @@ class EthereumFullBlocksReaderSpec extends Specification {
         def txes = new TxMemCache()
         def blocks = new BlocksMemCache()
 
-        txes.add(TxContainer.from(tx1, objectMapper))
+        txes.add(TxContainer.from(tx1))
-        txes.add(TxContainer.from(tx2, objectMapper))
+        txes.add(TxContainer.from(tx2))
-        txes.add(TxContainer.from(tx3, objectMapper))
+        txes.add(TxContainer.from(tx3))
-        txes.add(TxContainer.from(tx4, objectMapper))
+        txes.add(TxContainer.from(tx4))
-        blocks.add(BlockContainer.from(block1, objectMapper))
+        blocks.add(BlockContainer.from(block1))
-        blocks.add(BlockContainer.from(block2, objectMapper))
+        blocks.add(BlockContainer.from(block2))
-        blocks.add(BlockContainer.from(block3, objectMapper))
+        blocks.add(BlockContainer.from(block3))
 
-        def full = new EthereumFullBlocksReader(objectMapper, blocks, txes)
+        def full = new EthereumFullBlocksReader(blocks, txes)
 
         when:
         def act = full.read(BlockId.from(block1.hash)).block()
@@ -179,15 +180,15 @@ class EthereumFullBlocksReaderSpec extends Specification {
         def txes = new TxMemCache()
         def blocks = new BlocksMemCache()
 
-        txes.add(TxContainer.from(tx1, objectMapper))
+        txes.add(TxContainer.from(tx1))
-        txes.add(TxContainer.from(tx2, objectMapper))
+        txes.add(TxContainer.from(tx2))
-        txes.add(TxContainer.from(tx3, objectMapper))
+        txes.add(TxContainer.from(tx3))
-        txes.add(TxContainer.from(tx4, objectMapper))
+        txes.add(TxContainer.from(tx4))
-        blocks.add(BlockContainer.from(block1, objectMapper))
+        blocks.add(BlockContainer.from(block1))
-        blocks.add(BlockContainer.from(block2, objectMapper))
+        blocks.add(BlockContainer.from(block2))
-        blocks.add(BlockContainer.from(block3, objectMapper))
+        blocks.add(BlockContainer.from(block3))
 
-        def full = new EthereumFullBlocksReader(objectMapper, blocks, txes)
+        def full = new EthereumFullBlocksReader(blocks, txes)
 
         when:
         def act = full.read(BlockId.from(block3.hash)).block()
@@ -204,10 +205,10 @@ class EthereumFullBlocksReaderSpec extends Specification {
         def txes = new TxMemCache()
         def blocks = new BlocksMemCache()
 
-        txes.add(TxContainer.from(tx1, objectMapper))
+        txes.add(TxContainer.from(tx1))
-        blocks.add(BlockContainer.from(block1, objectMapper)) //missing tx2 in cache
+        blocks.add(BlockContainer.from(block1)) //missing tx2 in cache
 
-        def full = new EthereumFullBlocksReader(objectMapper, blocks, txes)
+        def full = new EthereumFullBlocksReader(blocks, txes)
 
         when:
         def act = full.read(BlockId.from(block1.hash)).block()
@@ -221,11 +222,11 @@ class EthereumFullBlocksReaderSpec extends Specification {
         def txes = new TxMemCache()
         def blocks = new BlocksMemCache()
 
-        txes.add(TxContainer.from(tx1, objectMapper))
+        txes.add(TxContainer.from(tx1))
-        txes.add(TxContainer.from(tx2, objectMapper))
+        txes.add(TxContainer.from(tx2))
-        txes.add(TxContainer.from(tx3, objectMapper))
+        txes.add(TxContainer.from(tx3))
 
-        def full = new EthereumFullBlocksReader(objectMapper, blocks, txes)
+        def full = new EthereumFullBlocksReader(blocks, txes)
 
         when:
         def act = full.read(BlockId.from(block1.hash)).block()

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/EthereumHeadLagObserverSpec.groovy

@@ -16,9 +16,7 @@
  */
 package io.emeraldpay.dshackle.upstream.ethereum
 
-import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.dshackle.data.BlockContainer
-import io.emeraldpay.dshackle.test.TestingCommons
 import io.emeraldpay.dshackle.upstream.Head
 import io.emeraldpay.dshackle.upstream.HeadLagObserver
 import io.emeraldpay.dshackle.upstream.Upstream
@@ -35,8 +33,6 @@ import java.time.Instant
 
 class EthereumHeadLagObserverSpec extends Specification {
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
-
     def "Updates lag distance"() {
         setup:
         Head master = Mock()
@@ -53,14 +49,12 @@ class EthereumHeadLagObserverSpec extends Specification {
 
         def blocks = [100, 101, 102].collect { i ->
             return BlockContainer.from(
-                    new BlockJson().with {
+                    new BlockJson().tap {
                         it.number = i
                         it.totalDifficulty = 2000 + i
                         it.hash = BlockHash.from("0x3ec2ebf5d0ec474d0ac6bc50d2770d8409ad76e119968e7919f85d5ec8915" + i)
                         it.timestamp = Instant.now()
-                        return it
+                    })
-                    },
-                    objectMapper)
         }
 
         def masterBus = TopicProcessor.create()
@@ -97,14 +91,12 @@ class EthereumHeadLagObserverSpec extends Specification {
 
         def blocks = [100, 101, 102].collect { i ->
             return BlockContainer.from(
-                    new BlockJson().with {
+                    new BlockJson().tap {
                         it.number = i
                         it.totalDifficulty = 2000 + i
                         it.hash = BlockHash.from("0x3ec2ebf5d0ec474d0ac6bc50d2770d8409ad76e119968e7919f85d5ec8915" + i)
                         it.timestamp = Instant.now()
-                        return it
+                    })
-                    },
-                    objectMapper)
         }
 
         def upblocks = Flux.fromIterable(blocks)
@@ -137,7 +129,7 @@ class EthereumHeadLagObserverSpec extends Specification {
             it.timestamp = Instant.now()
             return it
         }
-        delta as Long == observer.extractDistance(BlockContainer.from(top, objectMapper), BlockContainer.from(curr, objectMapper))
+        delta as Long == observer.extractDistance(BlockContainer.from(top), BlockContainer.from(curr))
         where:
         topHeight | topDiff | currHeight | currDiff | delta
         100       | 1000    | 100        | 1000     | 0

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/EthereumReaderSpec.groovy

@@ -58,13 +58,12 @@ class EthereumReaderSpec extends Specification {
     def "Block by Id reads from cache"() {
         setup:
         def memCache = Mock(BlocksMemCache) {
-            1 * read(blockId) >> Mono.just(BlockContainer.from(blockJson, TestingCommons.objectMapper()))
+            1 * read(blockId) >> Mono.just(BlockContainer.from(blockJson))
         }
         def caches = Caches.newBuilder()
                 .setBlockByHash(memCache)
-                .setObjectMapper(TestingCommons.objectMapper())
                 .build()
-        def reader = new EthereumReader(Stub(Multistream), caches, TestingCommons.objectMapper())
+        def reader = new EthereumReader(Stub(Multistream), caches)
 
         when:
         def act = reader.blocksById().read(blockId).block()
@@ -80,13 +79,12 @@ class EthereumReaderSpec extends Specification {
         }
         def caches = Caches.newBuilder()
                 .setBlockByHash(memCache)
-                .setObjectMapper(TestingCommons.objectMapper())
                 .build()
         def api = TestingCommons.api()
         api.answer("eth_getBlockByHash", ["0xf85b826fdf98ee0f48f7db001be00472e63ceb056846f4ecac5f0c32878b8ab2", false], blockJson)
 
         def upstream = TestingCommons.aggregatedUpstream(api)
-        def reader = new EthereumReader(upstream, caches, TestingCommons.objectMapper())
+        def reader = new EthereumReader(upstream, caches)
 
         when:
         def act = reader.blocksById().read(blockId).block()
@@ -102,13 +100,12 @@ class EthereumReaderSpec extends Specification {
         }
         def caches = Caches.newBuilder()
                 .setBlockByHash(memCache)
-                .setObjectMapper(TestingCommons.objectMapper())
                 .build()
         def api = TestingCommons.api()
         api.answer("eth_getBlockByHash", ["0xf85b826fdf98ee0f48f7db001be00472e63ceb056846f4ecac5f0c32878b8ab2", false], blockJson)
 
         def upstream = TestingCommons.aggregatedUpstream(api)
-        def reader = new EthereumReader(upstream, caches, TestingCommons.objectMapper())
+        def reader = new EthereumReader(upstream, caches)
 
         when:
         def act = reader.blocksById().read(blockId).block()
@@ -120,13 +117,12 @@ class EthereumReaderSpec extends Specification {
     def "Block by Hash reads from cache"() {
         setup:
         def memCache = Mock(BlocksMemCache) {
-            1 * read(blockId) >> Mono.just(BlockContainer.from(blockJson, TestingCommons.objectMapper()))
+            1 * read(blockId) >> Mono.just(BlockContainer.from(blockJson))
         }
         def caches = Caches.newBuilder()
                 .setBlockByHash(memCache)
-                .setObjectMapper(TestingCommons.objectMapper())
                 .build()
-        def reader = new EthereumReader(Stub(Multistream), caches, TestingCommons.objectMapper())
+        def reader = new EthereumReader(Stub(Multistream), caches)
 
         when:
         def act = reader.blocksByHash().read(blockJson.hash).block()
@@ -142,12 +138,11 @@ class EthereumReaderSpec extends Specification {
         }
         def caches = Caches.newBuilder()
                 .setBlockByHash(memCache)
-                .setObjectMapper(TestingCommons.objectMapper())
                 .build()
         def api = TestingCommons.api()
         api.answer("eth_getBlockByHash", ["0xf85b826fdf98ee0f48f7db001be00472e63ceb056846f4ecac5f0c32878b8ab2", false], blockJson)
         def upstream = TestingCommons.aggregatedUpstream(api)
-        def reader = new EthereumReader(upstream, caches, TestingCommons.objectMapper())
+        def reader = new EthereumReader(upstream, caches)
 
         when:
         def act = reader.blocksByHash().read(blockJson.hash).block()
@@ -159,13 +154,12 @@ class EthereumReaderSpec extends Specification {
     def "Tx by Hash reads from cache"() {
         setup:
         def memCache = Mock(TxMemCache) {
-            1 * read(txId) >> Mono.just(TxContainer.from(txJson, TestingCommons.objectMapper()))
+            1 * read(txId) >> Mono.just(TxContainer.from(txJson))
         }
         def caches = Caches.newBuilder()
                 .setTxByHash(memCache)
-                .setObjectMapper(TestingCommons.objectMapper())
                 .build()
-        def reader = new EthereumReader(Stub(Multistream), caches, TestingCommons.objectMapper())
+        def reader = new EthereumReader(Stub(Multistream), caches)
 
         when:
         def act = reader.txByHash().read(txJson.hash).block()
@@ -181,13 +175,12 @@ class EthereumReaderSpec extends Specification {
         }
         def caches = Caches.newBuilder()
                 .setTxByHash(memCache)
-                .setObjectMapper(TestingCommons.objectMapper())
                 .build()
 
         def api = TestingCommons.api()
         api.answer("eth_getTransactionByHash", [txJson.hash.toHex()], txJson)
         def upstream = TestingCommons.aggregatedUpstream(api)
-        def reader = new EthereumReader(upstream, caches, TestingCommons.objectMapper())
+        def reader = new EthereumReader(upstream, caches)
 
         when:
         def act = reader.txByHash().read(txJson.hash).block()
@@ -203,7 +196,7 @@ class EthereumReaderSpec extends Specification {
         api.answerOnce("eth_getBalance", ["0x70b91ff87a902b53dc6e2f6bda8bb9b330ccd30c", "latest"], "0xff")
         EthereumUpstreamMock upstream = new EthereumUpstreamMock(Chain.ETHEREUM, api)
         def upstreams = TestingCommons.aggregatedUpstream(upstream)
-        def reader = new EthereumReader(upstreams, Caches.default(TestingCommons.objectMapper()), TestingCommons.objectMapper())
+        def reader = new EthereumReader(upstreams, Caches.default())
         reader.start()
 
         when:
@@ -225,7 +218,7 @@ class EthereumReaderSpec extends Specification {
             it.number++
             it.totalDifficulty = BigInteger.TWO
         }
-        upstream.nextBlock(BlockContainer.from(block2, TestingCommons.objectMapper()))
+        upstream.nextBlock(BlockContainer.from(block2))
         Thread.sleep(50)
         act = reader.balance().read(Address.from("0x70b91ff87a902b53dc6e2f6bda8bb9b330ccd30c")).block()
 

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/EthereumWsFactorySpec.groovy

@@ -15,17 +15,12 @@
  */
 package io.emeraldpay.dshackle.upstream.ethereum
 
-import com.fasterxml.jackson.databind.ObjectMapper
 import io.emeraldpay.dshackle.cache.BlocksMemCache
-import io.emeraldpay.dshackle.cache.Caches
 import io.emeraldpay.dshackle.data.BlockContainer
-import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.test.TestingCommons
 import io.infinitape.etherjar.domain.BlockHash
-import io.infinitape.etherjar.rpc.ReactorRpcClient
 import io.infinitape.etherjar.rpc.json.BlockJson
 import io.infinitape.etherjar.rpc.json.TransactionRefJson
-import reactor.core.publisher.Mono
 import reactor.test.StepVerifier
 import spock.lang.Specification
 
@@ -35,11 +30,9 @@ import java.time.temporal.ChronoUnit
 
 class EthereumWsFactorySpec extends Specification {
 
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
-
     def "Fetch block"() {
         setup:
-        def wsf = new EthereumWsFactory(new URI("http://localhost"), new URI("http://localhost"), objectMapper)
+        def wsf = new EthereumWsFactory(new URI("http://localhost"), new URI("http://localhost"))
         def blocksCache = Mock(BlocksMemCache)
 
         def block = new BlockJson<TransactionRefJson>()
@@ -61,7 +54,7 @@ class EthereumWsFactorySpec extends Specification {
 
         then:
         StepVerifier.create(ws.flux.take(1))
-                .expectNext(BlockContainer.from(block, objectMapper))
+                .expectNext(BlockContainer.from(block))
                 .expectComplete()
                 .verify(Duration.ofSeconds(1))
     }

src/test/groovy/io/emeraldpay/dshackle/upstream/ethereum/NativeCallRouterSpec.groovy

@@ -1,11 +1,9 @@
 package io.emeraldpay.dshackle.upstream.ethereum
 
 import io.emeraldpay.dshackle.cache.Caches
-import io.emeraldpay.dshackle.reader.EmptyReader
 import io.emeraldpay.dshackle.test.TestingCommons
 import io.emeraldpay.dshackle.upstream.calls.DefaultEthereumMethods
 import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcRequest
-import io.emeraldpay.dshackle.upstream.rpcclient.JsonRpcResponse
 import io.emeraldpay.grpc.Chain
 import spock.lang.Specification
 
@@ -15,13 +13,11 @@ class NativeCallRouterSpec extends Specification {
 
     def "Calls hardcoded"() {
         setup:
-        def methods = new DefaultEthereumMethods(TestingCommons.objectMapper(), Chain.ETHEREUM)
+        def methods = new DefaultEthereumMethods(Chain.ETHEREUM)
         def router = new NativeCallRouter(
-                TestingCommons.objectMapper(),
                 new EthereumReader(
                         TestingCommons.aggregatedUpstream(TestingCommons.api()),
-                        Caches.default(TestingCommons.objectMapper()),
+                        Caches.default()
-                        TestingCommons.objectMapper()
                 ),
                 methods
         )

src/test/groovy/io/emeraldpay/dshackle/upstream/grpc/EthereumGrpcUpstreamSpec.groovy

@@ -21,6 +21,7 @@ import com.google.protobuf.ByteString
 import io.emeraldpay.api.proto.BlockchainGrpc
 import io.emeraldpay.api.proto.BlockchainOuterClass
 import io.emeraldpay.api.proto.Common
+import io.emeraldpay.dshackle.Global
 import io.emeraldpay.dshackle.data.BlockId
 import io.emeraldpay.dshackle.test.MockGrpcServer
 import io.emeraldpay.dshackle.test.TestingCommons
@@ -39,7 +40,7 @@ import java.util.concurrent.CompletableFuture
 class EthereumGrpcUpstreamSpec extends Specification {
 
     MockGrpcServer mockServer = new MockGrpcServer()
-    ObjectMapper objectMapper = TestingCommons.objectMapper()
+    ObjectMapper objectMapper = Global.objectMapper
 
     def "Subscribe to head"() {
         setup:
@@ -72,7 +73,7 @@ class EthereumGrpcUpstreamSpec extends Specification {
                 )
             }
         })
-        def upstream = new EthereumGrpcUpstream("test", chain, client, objectMapper, new JsonRpcGrpcClient(client, chain, objectMapper))
+        def upstream = new EthereumGrpcUpstream("test", chain, client, new JsonRpcGrpcClient(client, chain))
         upstream.setLag(0)
         upstream.init(BlockchainOuterClass.DescribeChain.newBuilder()
                 .addAllSupportedMethods(["eth_getBlockByHash"])
@@ -129,7 +130,7 @@ class EthereumGrpcUpstreamSpec extends Specification {
                 )
             }
         })
-        def upstream = new EthereumGrpcUpstream("test", Chain.ETHEREUM, client, objectMapper, new JsonRpcGrpcClient(client, Chain.ETHEREUM, objectMapper))
+        def upstream = new EthereumGrpcUpstream("test", Chain.ETHEREUM, client, new JsonRpcGrpcClient(client, Chain.ETHEREUM))
         upstream.setLag(0)
         upstream.init(BlockchainOuterClass.DescribeChain.newBuilder()
                 .addAllSupportedMethods(["eth_getBlockByHash"])
@@ -190,7 +191,7 @@ class EthereumGrpcUpstreamSpec extends Specification {
                 finished.complete(true)
             }
         })
-        def upstream = new EthereumGrpcUpstream("test", chain, client, objectMapper, new JsonRpcGrpcClient(client, chain, objectMapper))
+        def upstream = new EthereumGrpcUpstream("test", chain, client, new JsonRpcGrpcClient(client, chain))
         upstream.setLag(0)
         upstream.init(BlockchainOuterClass.DescribeChain.newBuilder()
                 .addAllSupportedMethods(["eth_getBlockByHash"])

src/test/groovy/io/emeraldpay/dshackle/upstream/rpcclient/JsonRpcHttpClientSpec.groovy

@@ -40,7 +40,7 @@ class JsonRpcHttpClientSpec extends Specification {
 
     def "Make a request"() {
         setup:
-        JsonRpcHttpClient client = new JsonRpcHttpClient("localhost:18332", TestingCommons.objectMapper(), null, null)
+        JsonRpcHttpClient client = new JsonRpcHttpClient("localhost:18332", null, null)
         def resp = '{' +
                 '  "jsonrpc": "2.0",' +
                 '  "result": "0x98de45",' +
@@ -62,7 +62,7 @@ class JsonRpcHttpClientSpec extends Specification {
     def "Make request with basic auth"() {
         setup:
         def auth = new AuthConfig.ClientBasicAuth("user", "passwd")
-        def client = new JsonRpcHttpClient("localhost:18332", TestingCommons.objectMapper(), auth, null)
+        def client = new JsonRpcHttpClient("localhost:18332", auth, null)
 
         mockServer.when(
                 HttpRequest.request()

src/test/groovy/io/emeraldpay/dshackle/upstream/rpcclient/JsonRpcRequestSpec.groovy

@@ -24,7 +24,7 @@ class JsonRpcRequestSpec extends Specification {
         setup:
         def req = new JsonRpcRequest("test_foo", [])
         when:
-        def act = req.toJson(TestingCommons.objectMapper())
+        def act = req.toJson()
         then:
         new String(act) == '{"jsonrpc":"2.0","id":1,"method":"test_foo","params":[]}'
     }
@@ -33,7 +33,7 @@ class JsonRpcRequestSpec extends Specification {
         setup:
         def req = new JsonRpcRequest("test_foo", ["0x0000"])
         when:
-        def act = req.toJson(TestingCommons.objectMapper())
+        def act = req.toJson()
         then:
         new String(act) == '{"jsonrpc":"2.0","id":1,"method":"test_foo","params":["0x0000"]}'
     }
@@ -42,7 +42,7 @@ class JsonRpcRequestSpec extends Specification {
         setup:
         def req = new JsonRpcRequest("test_foo", ["0x0000", false])
         when:
-        def act = req.toJson(TestingCommons.objectMapper())
+        def act = req.toJson()
         then:
         new String(act) == '{"jsonrpc":"2.0","id":1,"method":"test_foo","params":["0x0000",false]}'
     }