diff --git a/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/PollingChainTipService.java b/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/PollingChainTipService.java
index 5bce81b3e..d86a6a643 100644
--- a/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/PollingChainTipService.java
+++ b/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/PollingChainTipService.java
@@ -5,13 +5,17 @@
 import io.reactivex.rxjava3.core.Maybe;
 import io.reactivex.rxjava3.core.Observable;
 import org.consensusj.bitcoin.json.pojo.ChainTip;
+import org.consensusj.bitcoin.jsonrpc.ChainTipClient;
+import org.consensusj.bitcoin.rx.ChainTipService;
+import org.consensusj.rx.jsonrpc.RxJsonRpcClient;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+//TODO: Merge with PollingChainTipServiceImpl
 /**
  * Interface with {@link PollingChainTipService#pollForDistinctChainTip()} method.
  */
-public interface PollingChainTipService extends RxJsonChainTipClient {
+public interface PollingChainTipService extends ChainTipService, ChainTipClient, RxJsonRpcClient {
     Logger log = LoggerFactory.getLogger(PollingChainTipService.class);
 
     /**
diff --git a/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/PollingChainTipServiceImpl.java b/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/PollingChainTipServiceImpl.java
index 90895d610..180be862e 100644
--- a/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/PollingChainTipServiceImpl.java
+++ b/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/PollingChainTipServiceImpl.java
@@ -7,6 +7,7 @@
 import io.reactivex.rxjava3.processors.BehaviorProcessor;
 import io.reactivex.rxjava3.processors.FlowableProcessor;
 import org.consensusj.bitcoin.jsonrpc.BitcoinClient;
+import org.consensusj.bitcoin.rx.ChainTipService;
 import org.consensusj.jsonrpc.JsonRpcStatusException;
 import org.reactivestreams.Publisher;
 import org.slf4j.Logger;
@@ -18,11 +19,12 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.TimeUnit;
 
+//TODO: Merge with PollingChainTipService
 /**
  * Implementation of {@link PollingChainTipService} using a {@link BitcoinClient} and a polling interval.
  * This can be used as a fallback if ZeroMQ is not available
  */
-public class PollingChainTipServiceImpl implements Closeable, PollingChainTipService {
+public class PollingChainTipServiceImpl implements ChainTipService, PollingChainTipService, Closeable {
     private static final Logger log = LoggerFactory.getLogger(PollingChainTipServiceImpl.class);
     private final BitcoinClient client;
     private final Observable<Long> interval;
diff --git a/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/RxBitcoinClient.java b/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/RxBitcoinClient.java
index d9cedc28b..8031ba334 100644
--- a/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/RxBitcoinClient.java
+++ b/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/RxBitcoinClient.java
@@ -7,13 +7,14 @@
 import org.consensusj.bitcoin.jsonrpc.BitcoinExtendedClient;
 import org.consensusj.bitcoin.rx.ChainTipService;
 import org.consensusj.bitcoin.rx.zeromq.RxBitcoinZmqService;
+import org.consensusj.rx.jsonrpc.RxJsonRpcClient;
 
 import javax.net.ssl.SSLContext;
 import java.net.URI;
 
 /**
  * A {@link BitcoinClient} enhanced with Reactive features. Can use either ZeroMQ or polling
- * to implement {@link RxJsonChainTipClient}.
+ * to implement {@link ChainTipService}.
  * <p>
  * TODO: answer the below questions
  * <p>
@@ -23,7 +24,7 @@
  * Should this class be renamed to {@code RxBitcoinJsonRpcClient} and the {@code RxBitcoinClient} interface be moved
  * to {@code cj-btc-rx?}
  */
-public class RxBitcoinClient extends BitcoinExtendedClient implements RxJsonChainTipClient {
+public class RxBitcoinClient extends BitcoinExtendedClient implements ChainTipService, RxJsonRpcClient {
     private final ChainTipService chainTipService;
 
     public RxBitcoinClient(Network network, URI server, String rpcuser, String rpcpassword) {
diff --git a/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/RxJsonChainTipClient.java b/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/RxJsonChainTipClient.java
index 5f7ff159f..c21a53073 100644
--- a/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/RxJsonChainTipClient.java
+++ b/cj-btc-rx-jsonrpc/src/main/java/org/consensusj/bitcoin/rx/jsonrpc/RxJsonChainTipClient.java
@@ -1,7 +1,6 @@
 package org.consensusj.bitcoin.rx.jsonrpc;
 
 import io.reactivex.rxjava3.core.Flowable;
-import org.consensusj.bitcoin.jsonrpc.ChainTipClient;
 import org.consensusj.bitcoin.rx.ChainTipService;
 import org.consensusj.jsonrpc.AsyncSupport;
 import org.consensusj.rx.jsonrpc.RxJsonRpcClient;
@@ -12,7 +11,8 @@
 /**
  * A JSON-RPC client interface that provides ChainTipService
  */
-public interface RxJsonChainTipClient extends ChainTipService, ChainTipClient, RxJsonRpcClient {
+@Deprecated
+public interface RxJsonChainTipClient extends ChainTipService, RxJsonRpcClient {
 
     /**
      * Repeatedly once-per-new-block poll a method