fix some issues after merge

src/main/kotlin/io/emeraldpay/dshackle/config/UpstreamsConfigReader.kt

@@ -101,7 +101,7 @@ class UpstreamsConfigReader(
                 val connConfigNode = getMapping(connNode, "grpc")!!
                 val upstream = UpstreamsConfig.Upstream<UpstreamsConfig.GrpcConnection>()
                 readUpstreamCommon(upNode, upstream)
-                readUpstreamGrpc(upNode, upstream)
+                readUpstreamGrpc(upNode)
                 if (isValid(upstream)) {
                     config.upstreams.add(upstream)
                     val connection = UpstreamsConfig.GrpcConnection()
@@ -245,7 +245,6 @@ class UpstreamsConfigReader(
 
     internal fun readUpstreamGrpc(
         upNode: MappingNode,
-        upstream: UpstreamsConfig.Upstream<UpstreamsConfig.GrpcConnection>
     ) {
         // Dshackle gRPC connection dispatches requests to different upstreams, which may
         // be on different blockchains, and each may have different set of labels.

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

@@ -48,7 +48,7 @@ open class EthereumPosGrpcUpstream(
     private val parentId: String,
     role: UpstreamsConfig.UpstreamRole,
     private val chain: Chain,
-    remote: ReactorBlockchainGrpc.ReactorBlockchainStub,
+    private val remote: ReactorBlockchainGrpc.ReactorBlockchainStub,
     client: JsonRpcGrpcClient,
     nodeRating: Int
 ) : EthereumPosUpstream(
@@ -121,6 +121,10 @@ open class EthereumPosGrpcUpstream(
         return upstreamStatus.getNodes()
     }
 
+    override fun getBlockchainApi(): ReactorBlockchainGrpc.ReactorBlockchainStub {
+        return remote
+    }
+
     // ------------------------------------------------------------------------------------------
 
     override fun getLabels(): Collection<UpstreamsConfig.Labels> {