Update ListPaymentsRequest message block

resources/rpc.proto

@@ -2359,12 +2359,32 @@ message Payment {
 }
 
 message ListPaymentsRequest {
-    /**
+    /*
     If true, then return payments that have not yet fully completed. This means
     that pending payments, as well as failed payments will show up if this
-    field is set to True.
+    field is set to true. This flag doesn't change the meaning of the indices,
+    which are tied to individual payments.
     */
     bool include_incomplete = 1;
+
+    /*
+    The index of a payment that will be used as either the start or end of a
+    query to determine which payments should be returned in the response. The
+    index_offset is exclusive. In the case of a zero index_offset, the query
+    will start with the oldest payment when paginating forwards, or will end
+    with the most recent payment when paginating backwards.
+    */
+    uint64 index_offset = 2;
+
+    // The maximal number of payments returned in the response to this query.
+    uint64 max_payments = 3;
+
+    /*
+    If set, the payments returned will result from seeking backwards from the
+    specified index offset. This can be used to paginate backwards. The order
+    of the returned payments is always oldest first (ascending index order).
+    */
+    bool reversed = 4;
 }
 
 message ListPaymentsResponse {