diff --git a/herodb/README.md b/herodb/README.md
index 4ac2b11..edbc14c 100644
--- a/herodb/README.md
+++ b/herodb/README.md
@@ -2,6 +2,14 @@
 
 A database library built on top of sled with model support.
 
+
+
+## example
+
+```bash
+cargo run --bin dbexample2
+```
+
 ## Features
 
 - Type-safe database operations
diff --git a/herodb/readme.md b/herodb/readme.md
deleted file mode 100644
index cc7c647..0000000
--- a/herodb/readme.md
+++ /dev/null
@@ -1,5 +0,0 @@
-
-
-```bash
-cargo test zaz::tests -- --test-threads=1
-```
\ No newline at end of file
diff --git a/herodb/src/models/biz/currency.rs b/herodb/src/models/biz/currency.rs
index cdc7a01..28464a0 100644
--- a/herodb/src/models/biz/currency.rs
+++ b/herodb/src/models/biz/currency.rs
@@ -1,6 +1,6 @@
 use chrono::{DateTime, Utc, Duration};
 use serde::{Deserialize, Serialize};
-use crate::core::{SledModel, Storable}; // Import Sled traits from new location
+use crate::db::base::{SledModel, Storable}; // Import Sled traits from db module
 
 /// Currency represents a monetary value with amount and currency code
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -54,3 +54,18 @@ impl CurrencyBuilder {
         })
     }
 }
+
+// Implement Storable trait (provides default dump/load)
+impl Storable for Currency {}
+
+// Implement SledModel trait
+impl SledModel for Currency {
+    fn get_id(&self) -> String {
+        // Use the currency code as the ID
+        self.currency_code.clone()
+    }
+
+    fn db_prefix() -> &'static str {
+        "currency"
+    }
+}
diff --git a/herodb/src/models/biz/product.rs b/herodb/src/models/biz/product.rs
index b6ca886..678f601 100644
--- a/herodb/src/models/biz/product.rs
+++ b/herodb/src/models/biz/product.rs
@@ -1,6 +1,6 @@
 use chrono::{DateTime, Utc, Duration};
 use serde::{Deserialize, Serialize};
-use crate::core::{SledModel, Storable}; // Import Sled traits from new location
+use crate::db::base::{SledModel, Storable}; // Import Sled traits from db module
 
 
 /// ProductType represents the type of a product
@@ -355,4 +355,4 @@ impl SledModel for Product {
 }
 
 // Import Currency from the currency module
-use super::Currency;
+use crate::models::biz::Currency;
diff --git a/herodb/src/models/biz/sale.rs b/herodb/src/models/biz/sale.rs
index 9e49b11..bcfede1 100644
--- a/herodb/src/models/biz/sale.rs
+++ b/herodb/src/models/biz/sale.rs
@@ -1,5 +1,5 @@
-use super::product::Currency; // Use super:: for sibling module
-use crate::core::{SledModel, Storable}; // Import Sled traits from new location
+use crate::models::biz::Currency; // Use crate:: for importing from the module
+use crate::db::base::{SledModel, Storable}; // Import Sled traits from db module
 // use super::db::Model; // Removed old Model trait import
 use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
diff --git a/herodb/tmp/dbexample2/currency/conf b/herodb/tmp/dbexample2/currency/conf
new file mode 100644
index 0000000..4154d7c
--- /dev/null
+++ b/herodb/tmp/dbexample2/currency/conf
@@ -0,0 +1,4 @@
+segment_size: 524288
+use_compression: false
+version: 0.34
+vQÁ
\ No newline at end of file
diff --git a/herodb/tmp/dbexample2/currency/db b/herodb/tmp/dbexample2/currency/db
new file mode 100644
index 0000000..d580733
Binary files /dev/null and b/herodb/tmp/dbexample2/currency/db differ
diff --git a/herodb/tmp/dbexample2/product/conf b/herodb/tmp/dbexample2/product/conf
new file mode 100644
index 0000000..4154d7c
--- /dev/null
+++ b/herodb/tmp/dbexample2/product/conf
@@ -0,0 +1,4 @@
+segment_size: 524288
+use_compression: false
+version: 0.34
+vQÁ
\ No newline at end of file
diff --git a/herodb/tmp/dbexample2/product/db b/herodb/tmp/dbexample2/product/db
new file mode 100644
index 0000000..3e682e3
Binary files /dev/null and b/herodb/tmp/dbexample2/product/db differ
diff --git a/herodb/tmp/dbexample2/sale/conf b/herodb/tmp/dbexample2/sale/conf
new file mode 100644
index 0000000..4154d7c
--- /dev/null
+++ b/herodb/tmp/dbexample2/sale/conf
@@ -0,0 +1,4 @@
+segment_size: 524288
+use_compression: false
+version: 0.34
+vQÁ
\ No newline at end of file
diff --git a/herodb/tmp/dbexample2/sale/db b/herodb/tmp/dbexample2/sale/db
new file mode 100644
index 0000000..a2c7114
Binary files /dev/null and b/herodb/tmp/dbexample2/sale/db differ