Send config on every request; fix rlp decoding

Author: Łukasz Gąsior

src/main/scala/io/iohk/ethereum/extvm/VMClient.scala

@@ -129,11 +129,11 @@ class VMClient(
     import msg.CallContext.Config
     val blockHeader = buildBlockHeaderMsg(ctx.blockHeader)
 
-    val ethereumConfig =
-      if (testMode)
-        Config.EthereumConfig(buildEthereumConfigMsg(ctx.evmConfig.blockchainConfig))
-      else
-        Config.Empty
+    val config = externalVmConfig.vmType match {
+      case VmConfig.ExternalConfig.VmTypeIele => Config.IeleConfig(buildIeleConfigMsg()) // always pass config for IELE
+      case _ if testMode => Config.EthereumConfig(buildEthereumConfigMsg(ctx.evmConfig.blockchainConfig))
+      case _ => Config.Empty
+    }
 
     msg.CallContext(
       callerAddr = ctx.callerAddr,
@@ -143,7 +143,7 @@ class VMClient(
       gasPrice = ctx.gasPrice,
       gasProvided = ctx.startGas,
       blockHeader = Some(blockHeader),
-      config = ethereumConfig
+      config = config
     )
   }
 

src/main/scala/io/iohk/ethereum/jsonrpc/EthService.scala

@@ -581,7 +581,7 @@ class EthService(
     dataEither match {
       case Right(data) =>
         call(CallRequest(CallTx(tx.from, tx.to, tx.gas, tx.gasPrice, tx.value, ByteString(data)), req.block))
-          .map(_.right.map { callResponse => IeleCallResponse(rlp.decode[Seq[ByteString]](callResponse.returnData)(seqEncDec[ByteString])) })
+          .map(_.right.map { callResponse => IeleCallResponse(rlp.decode[Seq[ByteString]](callResponse.returnData.toArray[Byte])(seqEncDec[ByteString])) })
       case Left(error) => Future.successful(Left(error))
     }
   }