Add messages required for base Sui indexer implementation

Author: kPatch

coffee_ws/src/sui_indexer_msgs/CMakeLists.txt

@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.8)
+project(sui_indexer_msgs)
+
+if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  add_compile_options(-Wall -Wextra -Wpedantic)
+endif()
+
+find_package(ament_cmake REQUIRED)
+find_package(builtin_interfaces REQUIRED)
+find_package(rosidl_default_generators REQUIRED)
+
+rosidl_generate_interfaces(${PROJECT_NAME}
+  "msg/SuiEvent.msg"
+  "msg/IndexerStatus.msg"
+  DEPENDENCIES builtin_interfaces
+)
+
+ament_package() 

coffee_ws/src/sui_indexer_msgs/msg/IndexerStatus.msg

@@ -0,0 +1,4 @@
+builtin_interfaces/Time timestamp
+string status
+string message
+uint64 last_processed_seq 

coffee_ws/src/sui_indexer_msgs/msg/SuiEvent.msg

@@ -0,0 +1,7 @@
+builtin_interfaces/Time timestamp
+string event_type
+string event_data  # JSON-encoded event data
+string tx_digest
+uint64 event_seq
+string module_name  # The module that emitted the event
+string package_id  # The package ID of the module