diff --git a/common/src/block.rs b/common/src/block.rs
index 6ad1902..72d6ab7 100644
--- a/common/src/block.rs
+++ b/common/src/block.rs
@@ -65,12 +65,12 @@ impl From<HashableBlockData> for Block {
 impl From<Block> for HashableBlockData {
     fn from(value: Block) -> Self {
         Self {
-            block_id: value.block_id,
-            prev_block_id: value.prev_block_id,
-            prev_block_hash: value.prev_block_hash,
-            timestamp: value.timestamp,
-            signature: value.signature,
-            transactions: value.transactions,
+            block_id: value.header.block_id,
+            prev_block_id: value.header.prev_block_id,
+            prev_block_hash: value.header.prev_block_hash,
+            timestamp: value.header.timestamp,
+            signature: value.header.signature,
+            transactions: value.body.transactions,
         }
     }
 }
@@ -81,6 +81,8 @@ impl HashableBlockData {
         bytes.extend_from_slice(&self.block_id.to_le_bytes());
         bytes.extend_from_slice(&self.prev_block_id.to_le_bytes());
         bytes.extend_from_slice(&self.prev_block_hash);
+        bytes.extend_from_slice(&self.timestamp.to_le_bytes());
+        bytes.extend_from_slice(&self.signature.to_bytes());
         let num_transactions: u32 = self.transactions.len() as u32;
         bytes.extend_from_slice(&num_transactions.to_le_bytes());
         for tx in &self.transactions {
@@ -117,14 +119,14 @@ impl HashableBlockData {
 }
 
 // TODO: Improve error handling. Remove unwraps.
-fn u32_from_cursor(cursor: &mut Cursor<&[u8]>) -> u32 {
+pub fn u32_from_cursor(cursor: &mut Cursor<&[u8]>) -> u32 {
     let mut word_buf = [0u8; 4];
     cursor.read_exact(&mut word_buf).unwrap();
     u32::from_le_bytes(word_buf)
 }
 
 // TODO: Improve error handling. Remove unwraps.
-fn u64_from_cursor(cursor: &mut Cursor<&[u8]>) -> u64 {
+pub fn u64_from_cursor(cursor: &mut Cursor<&[u8]>) -> u64 {
     let mut word_buf = [0u8; 8];
     cursor.read_exact(&mut word_buf).unwrap();
     u64::from_le_bytes(word_buf)
diff --git a/common/src/transaction.rs b/common/src/transaction.rs
index ba2cc97..f451499 100644
--- a/common/src/transaction.rs
+++ b/common/src/transaction.rs
@@ -1,3 +1,5 @@
+use std::io::Cursor;
+
 use k256::ecdsa::{
     signature::{Signer, Verifier},
     Signature, SigningKey, VerifyingKey,
@@ -240,10 +242,48 @@ impl Transaction {
     }
 }
 
+impl Transaction {
+    pub fn to_bytes(&self) -> Vec<u8> {
+        let mut bytes = Vec::new();
+        let body_bytes = self.body.to_bytes();
+        let signature_bytes = self.signature.to_bytes();
+        let public_key_bytes = self.public_key.to_sec1_bytes();
+
+        let body_bytes_len = body_bytes.len() as u32;
+        let signature_bytes_len = signature_bytes.len() as u32;
+        let public_key_bytes_len = public_key_bytes.len() as u32;
+
+        bytes.extend_from_slice(&body_bytes_len.to_le_bytes());
+        bytes.extend_from_slice(&signature_bytes_len.to_le_bytes());
+        bytes.extend_from_slice(&public_key_bytes_len.to_le_bytes());
+
+        bytes.extend_from_slice(&self.body.to_bytes());
+        bytes.extend_from_slice(&self.signature.to_bytes());
+        bytes.extend_from_slice(&self.public_key.to_sec1_bytes());
+
+        bytes
+    }
+
+    // TODO: Improve error handling. Remove unwraps.
+    pub fn from_bytes(data: &[u8]) -> Self {
+        let mut cursor = Cursor::new(data);
+
+        let body_bytes_len = u32_from_cursor(&mut cursor) as usize;
+        let signature_bytes_len = u32_from_cursor(&mut cursor) as usize;
+        let public_key_bytes_len = u32_from_cursor(&mut cursor) as usize;
+
+        let body_bytes = Vec::with_capacity(body_bytes_len);
+        let signature_bytes = Vec::with_capacity(signature_bytes_len);
+        let public_key_bytes = Vec::with_capacity(public_key_bytes_len);
+
+        
+    }
+}
+
 /// A transaction with a valid signature over the hash of its body.
 /// Can only be constructed from an `Transaction`
 /// if the signature is valid
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct AuthenticatedTransaction {
     hash: TransactionHash,
     transaction: Transaction,
@@ -265,6 +305,15 @@ impl AuthenticatedTransaction {
     }
 }
 
+impl AuthenticatedTransaction {
+    pub fn to_bytes(&self) -> Vec<u8> {
+        let mut bytes = Vec::new();
+        bytes.extend_from_slice(&self.hash);
+        bytes.extend_from_slice(&self.transaction.to_bytes());
+        bytes
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/nssa/program_methods/guest/Cargo.lock b/nssa/program_methods/guest/Cargo.lock
index 924cbb0..eb5eb30 100644
--- a/nssa/program_methods/guest/Cargo.lock
+++ b/nssa/program_methods/guest/Cargo.lock
@@ -506,16 +506,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
 [[package]]
-name = "chrono"
-version = "0.4.41"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c469d952047f47f91b68d1cba3f10d63c11d73e4636f24f08daf0278abf01c4d"
-dependencies = [
- "android-tzdata",
- "iana-time-zone",
- "num-traits",
- "serde",
- "windows-link",
 name = "chacha20"
 version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/nssa/src/privacy_preserving_transaction/encoding.rs b/nssa/src/privacy_preserving_transaction/encoding.rs
index b5d4950..b3b7082 100644
--- a/nssa/src/privacy_preserving_transaction/encoding.rs
+++ b/nssa/src/privacy_preserving_transaction/encoding.rs
@@ -16,7 +16,7 @@ const MESSAGE_ENCODING_PREFIX_LEN: usize = 22;
 const MESSAGE_ENCODING_PREFIX: &[u8; MESSAGE_ENCODING_PREFIX_LEN] = b"\x01/NSSA/v0.1/TxMessage/";
 
 impl EncryptedAccountData {
-    pub(crate) fn to_bytes(&self) -> Vec<u8> {
+    pub fn to_bytes(&self) -> Vec<u8> {
         let mut bytes = self.ciphertext.to_bytes();
         bytes.extend_from_slice(&self.epk.to_bytes());
         bytes.push(self.view_tag);