diff --git a/blockchain.py b/blockchain.py
index e5f289a..807c560 100644
--- a/blockchain.py
+++ b/blockchain.py
@@ -84,6 +84,40 @@ class FullBlock:
             previous_block = blockchain.get_block(self.previous_hash)
             return previous_block.get_difficulty_info(steps-1, blockchain)
 
+@dataclass
+class Datastructure:
+    nonce:int
+    timestamp: int
+    previous_hash: bytes
+    message: bytes
+    difficulty_sum: int
+    miner_pubkey: bytes
+    transaction: int
+
+
+    def get_block_raw(self):
+            sender_pubkey_raw = Ed25519PublicKey.from_public_bytes(self.sender)
+            msg_raw =  self.nonce.to_bytes(8, "big") + \
+                        self.timestamp.to_bytes(8, "big") + \
+                        self.previous_hash + \
+                        self.message + \
+                        self.difficulty_sum.to_bytes(32, "big") + \
+                        self.miner_pubkey +\
+                        self.transaction.to_bytes(148, "big")      
+            try:
+                sender_pubkey_raw.verify(self.previous_hash,msg_raw)
+            except InvalidSignature:
+                return False
+            return self.transaction >=1
+    def is_valid_after_transaction(self.tansaction):
+        if(self.transaction is None):
+            return False
+        
+        
+
+
+
+
 class Blockchain:
     def __init__(self):
         # maps block hashes to block instances