diff --git a/Cargo.toml b/Cargo.toml
index 287f2ee..1e13cba 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,4 +6,8 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-byteorder = "1.4.3"
\ No newline at end of file
+byteorder = "1.4.3"
+
+[lib]
+name = "sqlighters"
+crate-type = ["lib"]
\ No newline at end of file
diff --git a/src/builder.rs b/src/builder.rs
index 3e1b4c5..c34069f 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -1,4 +1,5 @@
 use std::mem;
+use crate::database::{Database, SchemaRecord};
 use crate::page::{self, Page};
 use crate::record::Record;
 
@@ -6,6 +7,7 @@ struct Builder {
     current_page: Page,
     n_records_on_current_page: u16,
     leaf_pages: Vec<Page>,
+    schema: Option<SchemaRecord>,
 }
 
 
@@ -15,6 +17,7 @@ impl Builder {
             current_page: Page::new_leaf(),
             n_records_on_current_page: 0,
             leaf_pages: Vec::new(),
+            schema: None,
         }
     }
 
@@ -31,6 +34,23 @@ impl Builder {
         self.n_records_on_current_page += 1;
     }
 
+    pub fn schema(&mut self, schema: SchemaRecord) {
+        self.schema = Some(schema);
+    }
+
+    pub fn build(mut self) -> Database {
+        self.current_page.set_fw_position(page::POSITION_CELL_COUNT);
+        self.current_page.put_u16(self.n_records_on_current_page);
+
+        if self.n_records_on_current_page > 0 {
+            self.current_page.put_u16(self.current_page.get_bw_position());
+        } else {
+            self.current_page.put_u16(self.current_page.get_bw_position() - 1);
+        }
+
+        Database::new(self.schema.unwrap(), self.leaf_pages) //panics is schema is not set
+    }
+
     fn current_page_is_full(&self, record: &Record) -> bool {
         self.current_page.get_bw_position() - record.get_length() <= self.current_page.get_fw_position() + 5
     }
diff --git a/src/bytebuffer.rs b/src/bytebuffer.rs
index 9490de3..512ff92 100644
--- a/src/bytebuffer.rs
+++ b/src/bytebuffer.rs
@@ -20,14 +20,7 @@ impl ByteBuffer {
     }
 
     /// forward put unsigned byte array
-    pub fn put_u8a(&mut self, bytes: &[u8]) {
-        for v in bytes {
-            self.data[self.fw_position as usize] = *v;
-            self.fw_position += 1;
-        }
-    }
-
-    pub fn put_u8v(&mut self, bytes: &Vec<u8>) {
+    pub fn put_bytes(&mut self, bytes: &[u8]) {
         for v in bytes {
             self.data[self.fw_position as usize] = *v;
             self.fw_position += 1;
@@ -35,7 +28,7 @@ impl ByteBuffer {
     }
 
     /// backward put unsigned byte array
-    pub fn put_u8a_bw(&mut self, bytes: &[u8]) {
+    pub fn put_bytes_bw(&mut self, bytes: &[u8]) {
         self.bw_position -= bytes.len() as u16;
         for v in bytes {
             self.data[self.bw_position as usize] = *v;
@@ -43,50 +36,42 @@ impl ByteBuffer {
         }
     }
 
-    pub fn put_vec_u8_bw(&mut self, bytes: Vec<u8>) {
-        self.bw_position -= bytes.len() as u16;
-        for v in bytes {
-            self.data[self.bw_position as usize] = v;
-            self.bw_position += 1;
-        }
-    }
-
     /// forward put unsigned byte
     pub fn put_u8(&mut self, byte: u8) {
-        self.put_u8a(&[byte]);
+        self.put_bytes(&[byte]);
     }
 
     /// backward put unsigned byte
     pub fn put_u8_bw(&mut self, byte: u8) {
-        self.put_u8a_bw(&[byte]);
+        self.put_bytes_bw(&[byte]);
     }
 
     /// forward put unsigned 16bit integer
     pub fn put_u16(&mut self, val: u16) {
         let mut buf = [0; 2];
         BigEndian::write_u16(&mut buf, val);
-        self.put_u8a(&buf);
+        self.put_bytes(&buf);
     }
 
     /// backward put unsigned 16bit integer
     pub fn put_u16_bw(&mut self, val: u16) {
         let mut buf = [0; 2];
         BigEndian::write_u16(&mut buf, val);
-        self.put_u8a_bw(&buf);
+        self.put_bytes_bw(&buf);
     }
 
     /// forward put unsigned 16bit integer
     pub fn put_u32(&mut self, val: u32) {
         let mut buf = [0; 4];
         BigEndian::write_u32(&mut buf, val);
-        self.put_u8a(&buf);
+        self.put_bytes(&buf);
     }
 
     /// backward put unsigned 32bit integer
     pub fn put_u32_bw(&mut self, val: u32) {
         let mut buf = [0; 4];
         BigEndian::write_u32(&mut buf, val);
-        self.put_u8a_bw(&buf);
+        self.put_bytes_bw(&buf);
     }
 }
 
@@ -104,7 +89,7 @@ mod tests {
     #[test]
     fn test_u8a() {
         let mut b = ByteBuffer::new(2);
-        b.put_u8a(&[1, 2]);
+        b.put_bytes(&[1, 2]);
         assert_eq!(b.data[0], 1);
         assert_eq!(b.data[1], 2);
     }
diff --git a/src/database.rs b/src/database.rs
index 12ef7b5..ad2db64 100644
--- a/src/database.rs
+++ b/src/database.rs
@@ -1,5 +1,21 @@
 use crate::page::Page;
 
+pub struct Database {
+    schema: SchemaRecord,
+    leaf_pages: Vec<Page>,
+}
+
+impl Database {
+    pub fn new(schema: SchemaRecord, leaf_pages: Vec<Page>) -> Self {
+        Self {
+            schema,
+            leaf_pages,
+        }
+    }
+}
+
+pub struct SchemaRecord {}
+
 
 fn write_header(mut rootpage: Page, n_pages: u32) {
     rootpage.put_u8a(&MAGIC_HEADER);
diff --git a/src/lib.rs b/src/lib.rs
index 9a14b38..05edccd 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,5 @@
+#![allow(dead_code)]
+
 mod page;
 mod database;
 mod bytebuffer;
diff --git a/src/page.rs b/src/page.rs
index 9710d2b..074325b 100644
--- a/src/page.rs
+++ b/src/page.rs
@@ -61,15 +61,15 @@ impl Page {
     }
 
     pub fn put_u8a(&mut self, value: &[u8]) {
-        self.data.put_u8a(value);
+        self.data.put_bytes(value);
     }
 
     pub fn put_u8a_bw(&mut self, value: &[u8]) {
-        self.data.put_u8a_bw(value);
+        self.data.put_bytes_bw(value);
     }
 
     pub fn put_vec_u8_bw(&mut self, value: Vec<u8>) {
-        self.data.put_vec_u8_bw(value);
+        self.data.put_bytes_bw(&value);
     }
 
     pub fn put_u8(&mut self, value: u8) {
diff --git a/src/record.rs b/src/record.rs
index dd720b3..2ade232 100644
--- a/src/record.rs
+++ b/src/record.rs
@@ -26,23 +26,23 @@ impl Record {
         let rowid_bytes = varint::write(self.rowid);
 
         let mut buffer = ByteBuffer::new(length_bytes.len() as u16 + rowid_bytes.len() as u16 + record_length);
-        buffer.put_u8v(&length_bytes);
-        buffer.put_u8v(&rowid_bytes);
+        buffer.put_bytes(&length_bytes);
+        buffer.put_bytes(&rowid_bytes);
 
         // 'The initial portion of the payload that does not spill to overflow pages.'
         let length_of_encoded_column_types: usize = self.values.iter()
             .map(|v| v.datatype.len())
             .sum();
-        buffer.put_u8v(&varint::write((length_of_encoded_column_types + 1) as u64));
+        buffer.put_bytes(&varint::write((length_of_encoded_column_types + 1) as u64));
 
         //write all types
         for v in self.values.iter() {
-            buffer.put_u8v(&v.datatype)
+            buffer.put_bytes(&v.datatype)
         }
 
         //  write all values
         for v in self.values.iter() {
-            buffer.put_u8v(&v.data) //copies individual bytes into a buffer...should I avoid copying?
+            buffer.put_bytes(&v.data) //copies individual bytes into a buffer...should I avoid copying?
         }
         buffer.data
     }
diff --git a/src/values.rs b/src/values.rs
index e942b60..b26b3f2 100644
--- a/src/values.rs
+++ b/src/values.rs
@@ -27,7 +27,7 @@ pub fn integer(value: i64) -> Value {
 }
 
 pub fn float(value: f64) -> Value {
-    let mut buffer = [0 as u8; 8];
+    let mut buffer = [0_u8; 8];
     BigEndian::write_f64(&mut buffer, value);
     Value { datatype: vec![7], data: buffer.to_vec() }
 }
@@ -42,14 +42,14 @@ fn sqlite_integer_to_bytes(value: i64) -> Vec<u8> {
     if value == 0 || value == 1 {
         vec![]
     } else {
-        return i64_to_bytes(value, get_length_of_byte_encoding(value));
+        i64_to_bytes(value, get_length_of_byte_encoding(value))
     }
 }
 
 fn i64_to_bytes(n: i64, nbytes: u8) -> Vec<u8> {
     let mut bytes = vec![];
     for i in 0..nbytes {
-        bytes.push(((n >> (nbytes - i - 1) * 8) & 0xFF) as u8);
+        bytes.push(((n >> ((nbytes - i - 1) * 8)) & 0xFF) as u8);
     }
 
     bytes