Fix issues with caches

- Fix read block
- Fix read not enrich blocks, refactoring read tx receipts

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

@@ -35,12 +35,13 @@ open class BlocksMemCache(
     }
 
     open fun get(key: BlockId): BlockContainer? {
-        return mapping.getIfPresent(key)?.let {
-            return@let if (it.enriched) it else null
-        }
+        return mapping.getIfPresent(key)
     }
 
     open fun add(block: BlockContainer) {
+        if (!block.enriched) {
+            return
+        }
         mapping.put(block.hash, block)
     }
 

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

@@ -121,10 +121,11 @@ class EthereumDirectReader(
                 return readWithQuorum(request)
                     .timeout(Defaults.timeoutInternal, Mono.error(TimeoutException("Receipt not read $key")))
                     .flatMap { json ->
-                        try {
-                            // Caching needs some additional data (ex. Height) to make a decision on how long and where to cache
-                            // So we have to parse the JSON here and extract reference data
-                            val receipt = objectMapper.readValue(json, TransactionReceiptJson::class.java)
+                        val receipt = objectMapper.readValue(json, TransactionReceiptJson::class.java)
+                        if (receipt == null) {
+                            log.debug("Empty receipt for txId $key")
+                            Mono.empty()
+                        } else {
                             caches.cacheReceipt(
                                 Caches.Tag.REQUESTED,
                                 DefaultContainer(
@@ -135,11 +136,8 @@ class EthereumDirectReader(
                                     parsed = receipt
                                 )
                             )
-                        } catch (t: Throwable) {
-                            log.warn("Failed to cache Tx Receipt", t)
-                            return@flatMap Mono.empty()
+                            Mono.just(json)
                         }
-                        Mono.just(json)
                     }
             }
         }

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

@@ -286,7 +286,7 @@ open class WsConnectionImpl(
         )
         val sender = currentRequests.remove(msg.id.asNumber().toInt())
         if (sender == null) {
-            log.warn("Unknown response received for ${msg.id} with body ${msg.value?.let { String(it) }}")
+            log.warn("Unknown response received for ${msg.id}")
         } else {
             try {
                 val emitResult = sender.tryEmitValue(rpcResponse)