diff --git a/sf-writer/src/ImageAssembler.cpp b/sf-writer/src/ImageAssembler.cpp
index f654fd4..3d9b6c2 100644
--- a/sf-writer/src/ImageAssembler.cpp
+++ b/sf-writer/src/ImageAssembler.cpp
@@ -16,6 +16,11 @@ ImageAssembler::~ImageAssembler()
     delete[] metadata_buffer_;
 }
 
+int ImageAssembler::get_free_slot()
+{
+
+}
+
 void ImageAssembler::process(
         const int slot_id,
         const int i_module,
@@ -24,17 +29,22 @@ void ImageAssembler::process(
 
 }
 
+int ImageAssembler::get_full_slot()
+{
+
+}
+
 void ImageAssembler::free_slot(const int slot_id)
 {
 
 }
 
-char* ImageAssembler::get_data_buffer(const int slot_id)
-{
-
-}
-
 ImageMetadataBlock* ImageAssembler::get_metadata_buffer(const int slot_id)
 {
+    return &(metadata_buffer_[slot_id]);
+}
 
-}
\ No newline at end of file
+char* ImageAssembler::get_data_buffer(const int slot_id)
+{
+    return image_buffer_ + (slot_id * MODULE_N_BYTES * n_modules_);
+}