diff --git a/src/main/java/bdledger/api/Client.java b/src/main/java/bdledger/api/Client.java
index efa43a8..ee81af4 100644
--- a/src/main/java/bdledger/api/Client.java
+++ b/src/main/java/bdledger/api/Client.java
@@ -328,11 +328,11 @@ public class Client {
   public ListenableFuture<GetBlocksResponse> getBlocks(String ledger, long startUnixTime, long endUnixTime) {
 
     info(
-        "*** getBlock: ledger={0} startUnixTime={1} endUnixTime={2}",
+        "*** getBlocks: ledger={0} startUnixTime={1} endUnixTime={2}",
         ledger, startUnixTime, endUnixTime);
 
     try {
-      return queryFutureStub.getBlocks(getBlocksRequest(ledger, startUnixTime, endUnixTime));
+      return queryFutureStub.getBlocks(blocksRequest(ledger, startUnixTime, endUnixTime));
     } catch (StatusRuntimeException e) {
       warning("RPC failed: {0}", e.getStatus());
       return null;
@@ -356,11 +356,11 @@ public class Client {
   public GetBlocksResponse getBlocksSync(String ledger, long startUnixTime, long endUnixTime) {
 
     info(
-        "*** getBlockSync: ledger={0} startUnixTime={1} endUnixTime={2}",
+        "*** getBlocksSync: ledger={0} startUnixTime={1} endUnixTime={2}",
         ledger, startUnixTime, endUnixTime);
 
     try {
-      return queryBlockingStub.getBlocks(getBlocksRequest(ledger, startUnixTime, endUnixTime));
+      return queryBlockingStub.getBlocks(blocksRequest(ledger, startUnixTime, endUnixTime));
     } catch (StatusRuntimeException e) {
       warning("RPC failed: {0}", e.getStatus());
       return null;
@@ -377,7 +377,7 @@ public class Client {
     info("*** blockNumber: ledger={0}", ledger);
 
     try {
-      return queryFutureStub.countBlocks(getBlocksRequest(ledger, -1, -1));
+      return queryFutureStub.countBlocks(blocksRequest(ledger, -1, -1));
     } catch (StatusRuntimeException e) {
       warning("RPC failed: {0}", e.getStatus());
       return null;
@@ -394,14 +394,14 @@ public class Client {
     info("*** blockNumberSync: ledger={0}", ledger);
 
     try {
-      return queryBlockingStub.countBlocks(getBlocksRequest(ledger, -1, -1));
+      return queryBlockingStub.countBlocks(blocksRequest(ledger, -1, -1));
     } catch (StatusRuntimeException e) {
       warning("RPC failed: {0}", e.getStatus());
       return null;
     }
   }
 
-  private BlocksRequest getBlocksRequest(String ledger, long startTimestamp, long endTimestamp) {
+  private BlocksRequest blocksRequest(String ledger, long startTimestamp, long endTimestamp) {
 
     BlocksRequest.Builder reqBuilder =
         BlocksRequest.newBuilder().setLedger(ledger);
@@ -515,6 +515,98 @@ public class Client {
     return reqBuilder.build();
   }
 
+  /**
+   * <a
+   * href="#">返回时间范围内的事务</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<GetTransactionsResponse> getTransactions(String ledger, ZonedDateTime startDateTime) {
+    return getTransactions(ledger, startDateTime.toEpochSecond());
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的事务</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<GetTransactionsResponse> getTransactions(String ledger, ZonedDateTime startDateTime, ZonedDateTime endDateTime) {
+    return getTransactions(ledger, startDateTime.toEpochSecond(), endDateTime.toEpochSecond());
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的事务</a>
+   * （阻塞）
+   */
+  public GetTransactionsResponse getTransactionsSync(String ledger, ZonedDateTime startDateTime) {
+    return getTransactionsSync(ledger, startDateTime.toEpochSecond());
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的事务</a>
+   * （阻塞）
+   */
+  public GetTransactionsResponse getTransactionsSync(String ledger, ZonedDateTime startDateTime, ZonedDateTime endDateTime) {
+    return getTransactionsSync(ledger, startDateTime.toEpochSecond(), endDateTime.toEpochSecond());
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的事务</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<GetTransactionsResponse> getTransactions(String ledger, long startUnixTime) {
+    return getTransactions(ledger, startUnixTime, -1);
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的事务</a>
+   * （非阻塞）
+   */
+  public ListenableFuture<GetTransactionsResponse> getTransactions(String ledger, long startUnixTime, long endUnixTime) {
+
+    info(
+        "*** getTransactions: ledger={0} startUnixTime={1} endUnixTime={2}",
+        ledger, startUnixTime, endUnixTime);
+
+    try {
+      return queryFutureStub.getTransactions(transactionsRequest(ledger, startUnixTime, endUnixTime));
+    } catch (StatusRuntimeException e) {
+      warning("RPC failed: {0}", e.getStatus());
+      return null;
+    }
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的事务</a>
+   * （阻塞）
+   */
+  public GetTransactionsResponse getTransactionsSync(String ledger, long startUnixTime) {
+    return getTransactionsSync(ledger, startUnixTime, -1);
+  }
+
+  /**
+   * <a
+   * href="#">返回时间范围内的事务</a>
+   * （阻塞）
+   */
+  public GetTransactionsResponse getTransactionsSync(String ledger, long startUnixTime, long endUnixTime) {
+
+    info(
+        "*** getTransactionsSync: ledger={0} startUnixTime={1} endUnixTime={2}",
+        ledger, startUnixTime, endUnixTime);
+
+    try {
+      return queryBlockingStub.getTransactions(transactionsRequest(ledger, startUnixTime, endUnixTime));
+    } catch (StatusRuntimeException e) {
+      warning("RPC failed: {0}", e.getStatus());
+      return null;
+    }
+  }
+
   /**
    * <a
    * href="#">返回账本中的事务数量</a>
@@ -525,7 +617,7 @@ public class Client {
     info("*** blockNumber: ledger={0}", ledger);
 
     try {
-      return queryFutureStub.countTransactions(transactionsRequest(ledger));
+      return queryFutureStub.countTransactions(transactionsRequest(ledger, -1, -1));
     } catch (StatusRuntimeException e) {
       warning("RPC failed: {0}", e.getStatus());
       return null;
@@ -542,15 +634,25 @@ public class Client {
     info("*** blockNumberSync: ledger={0}", ledger);
 
     try {
-      return queryBlockingStub.countTransactions(transactionsRequest(ledger));
+      return queryBlockingStub.countTransactions(transactionsRequest(ledger, -1, -1));
     } catch (StatusRuntimeException e) {
       warning("RPC failed: {0}", e.getStatus());
       return null;
     }
   }
 
-  private TransactionsRequest transactionsRequest(String ledger) {
-    return TransactionsRequest.newBuilder().setLedger(ledger).build();
+  private TransactionsRequest transactionsRequest(String ledger, long startTimestamp, long endTimestamp) {
+
+    TransactionsRequest.Builder reqBuilder =
+        TransactionsRequest.newBuilder().setLedger(ledger);
+    if (startTimestamp != -1) {
+      reqBuilder.setStartTimestamp(startTimestamp);
+    }
+    if (endTimestamp != -1) {
+      reqBuilder.setEndTimestamp(endTimestamp);
+    }
+
+    return reqBuilder.build();
   }
 
   private void info(String msg, Object... params) {
diff --git a/src/main/java/bdledger/api/grpc/query/BlocksRequest.java b/src/main/java/bdledger/api/grpc/query/BlocksRequest.java
index f24a5dd..921397e 100644
--- a/src/main/java/bdledger/api/grpc/query/BlocksRequest.java
+++ b/src/main/java/bdledger/api/grpc/query/BlocksRequest.java
@@ -150,10 +150,6 @@ private static final long serialVersionUID = 0L;
   public static final int START_TIMESTAMP_FIELD_NUMBER = 2;
   private long startTimestamp_;
   /**
-   * <pre>
-   * required
-   * </pre>
-   *
    * <code>int64 start_timestamp = 2;</code>
    * @return The startTimestamp.
    */
@@ -679,10 +675,6 @@ private static final long serialVersionUID = 0L;
 
     private long startTimestamp_ ;
     /**
-     * <pre>
-     * required
-     * </pre>
-     *
      * <code>int64 start_timestamp = 2;</code>
      * @return The startTimestamp.
      */
@@ -690,10 +682,6 @@ private static final long serialVersionUID = 0L;
       return startTimestamp_;
     }
     /**
-     * <pre>
-     * required
-     * </pre>
-     *
      * <code>int64 start_timestamp = 2;</code>
      * @param value The startTimestamp to set.
      * @return This builder for chaining.
@@ -705,10 +693,6 @@ private static final long serialVersionUID = 0L;
       return this;
     }
     /**
-     * <pre>
-     * required
-     * </pre>
-     *
      * <code>int64 start_timestamp = 2;</code>
      * @return This builder for chaining.
      */
diff --git a/src/main/java/bdledger/api/grpc/query/BlocksRequestOrBuilder.java b/src/main/java/bdledger/api/grpc/query/BlocksRequestOrBuilder.java
index 77ecc59..3cbefda 100644
--- a/src/main/java/bdledger/api/grpc/query/BlocksRequestOrBuilder.java
+++ b/src/main/java/bdledger/api/grpc/query/BlocksRequestOrBuilder.java
@@ -20,10 +20,6 @@ public interface BlocksRequestOrBuilder extends
       getLedgerBytes();
 
   /**
-   * <pre>
-   * required
-   * </pre>
-   *
    * <code>int64 start_timestamp = 2;</code>
    * @return The startTimestamp.
    */
diff --git a/src/main/java/bdledger/api/grpc/query/QueryGrpc.java b/src/main/java/bdledger/api/grpc/query/QueryGrpc.java
index 05a1074..00b5260 100644
--- a/src/main/java/bdledger/api/grpc/query/QueryGrpc.java
+++ b/src/main/java/bdledger/api/grpc/query/QueryGrpc.java
@@ -300,6 +300,9 @@ public final class QueryGrpc {
     }
 
     /**
+     * <pre>
+     * start_timestamp is required
+     * </pre>
      */
     public void getBlocks(bdledger.api.grpc.query.BlocksRequest request,
         io.grpc.stub.StreamObserver<bdledger.api.grpc.query.GetBlocksResponse> responseObserver) {
@@ -419,6 +422,9 @@ public final class QueryGrpc {
     }
 
     /**
+     * <pre>
+     * start_timestamp is required
+     * </pre>
      */
     public void getBlocks(bdledger.api.grpc.query.BlocksRequest request,
         io.grpc.stub.StreamObserver<bdledger.api.grpc.query.GetBlocksResponse> responseObserver) {
@@ -489,6 +495,9 @@ public final class QueryGrpc {
     }
 
     /**
+     * <pre>
+     * start_timestamp is required
+     * </pre>
      */
     public bdledger.api.grpc.query.GetBlocksResponse getBlocks(bdledger.api.grpc.query.BlocksRequest request) {
       return blockingUnaryCall(
@@ -554,6 +563,9 @@ public final class QueryGrpc {
     }
 
     /**
+     * <pre>
+     * start_timestamp is required
+     * </pre>
      */
     public com.google.common.util.concurrent.ListenableFuture<bdledger.api.grpc.query.GetBlocksResponse> getBlocks(
         bdledger.api.grpc.query.BlocksRequest request) {
diff --git a/src/test/java/bdledger/api/ClientTests.java b/src/test/java/bdledger/api/ClientTests.java
index 28902fb..2fb7493 100644
--- a/src/test/java/bdledger/api/ClientTests.java
+++ b/src/test/java/bdledger/api/ClientTests.java
@@ -226,6 +226,29 @@ class ClientTests {
     assertEquals(tx, t);
   }
 
+  // TODO
+  @Test
+  @DisplayName("getTransactions#1")
+  void getTransactions1() throws ExecutionException, InterruptedException {
+    client.getTransactions(ledger, 0).get();
+  }
+
+  // TODO
+  @Test
+  @DisplayName("getTransactions#2")
+  void getTransactions2() throws ExecutionException, InterruptedException {
+    client.getTransactions(ledger, 0, 0).get();
+  }
+
+  @Test
+  @DisplayName("getTransactions#3")
+  void getTransactions3() {
+    Throwable e = assertThrows(Exception.class, () -> client.getTransactions("", 0, 0).get());
+    Status s = Status.fromThrowable(e);
+    assertEquals(Status.Code.INVALID_ARGUMENT, s.getCode());
+    assertEquals("ledger must not be empty", s.getDescription());
+  }
+
   @Test
   @DisplayName("CountTransactions#1")
   void CountTransactions1() throws ExecutionException, InterruptedException {