diff --git a/src/main.py b/src/main.py
index fa6ed5e..d4fda4b 100644
--- a/src/main.py
+++ b/src/main.py
@@ -28,19 +28,10 @@ def parse_arguments():
 
     mempool = MemPool(args.mempool)
 
-    # TODO pokracovani
-    
+    block_transactions = []
 
-    #block_transactions = [COINBASE_TRANSACTION] + mempool.valid_transactions
-
-    # Initialize an empty list for transactions
-    block_transactions = [COINBASE_TRANSACTION]
-
-    # Initialize total weight and total fees
     total_weight = 0
     total_fees = 0
-
-    # Set the maximum block weight
     max_block_weight = 4000000
 
     # Sort the transactions by the fee in descending order
@@ -54,7 +45,7 @@ def parse_arguments():
         total_weight = total_weight + tx_weight
         total_fees = total_fees + tx.fee
 
-    transaction_hashes = [calculate_txid(COINBASE_TRANSACTION, True)] + [calculate_txid(transaction.json_transaction, transaction.has_witness) for transaction in block_transactions[1:]]
+    transaction_hashes = [calculate_txid(COINBASE_TRANSACTION, True)] + [calculate_txid(transaction.json_transaction, transaction.has_witness) for transaction in block_transactions]
     block_hash = block_mining(transaction_hashes).hex()
 
     wtxids =  ["0000000000000000000000000000000000000000000000000000000000000000"] + transaction_hashes[1:]
diff --git a/src/script.py b/src/script.py
index f3790b8..c0725b4 100644
--- a/src/script.py
+++ b/src/script.py
@@ -46,51 +46,6 @@ def __init__(self, script: bytes, json_transaction: dict = None, input_index: in
     def create_signature_hash(self, hash_type: int) -> bytes:
         data_signed = serialize_transaction(self.transaction, self.input_index, int(hash_type), self.segwit)
         return hashlib.sha256(data_signed).digest()
- 
-    def serialize_transaction(self, tx: dict) -> bytes:
-        """Serialize a transaction for signing/verification"""
-        result = bytearray()
-        
-        # Version
-        result.extend(tx['version'].to_bytes(4, 'little'))
-        
-        # Number of inputs
-        result.extend(len(tx['vin']).to_bytes(1, 'little'))
-        
-        # Inputs
-        for inp in tx['vin']:
-            # Previous transaction hash (reverse byte order)
-            prev_tx = bytes.fromhex(inp['txid'])[::-1]
-            result.extend(prev_tx)
-            
-            # Previous output index
-            result.extend(inp['vout'].to_bytes(4, 'little'))
-            
-            # Script
-            script_sig = bytes.fromhex(inp['scriptsig']) if inp['scriptsig'] else b''
-            result.extend(len(script_sig).to_bytes(1, 'little'))
-            result.extend(script_sig)
-            
-            # Sequence
-            result.extend(inp['sequence'].to_bytes(4, 'little'))
-            
-        # Number of outputs
-        result.extend(len(tx['vout']).to_bytes(1, 'little'))
-        
-        # Outputs
-        for out in tx['vout']:
-            # Amount in satoshis
-            result.extend(out['value'].to_bytes(8, 'little'))
-            
-            # Script
-            script_pubkey = bytes.fromhex(out['scriptpubkey'])
-            result.extend(len(script_pubkey).to_bytes(1, 'little'))
-            result.extend(script_pubkey)
-            
-        # Locktime
-        result.extend(tx['locktime'].to_bytes(4, 'little'))
-        
-        return bytes(result)
         
     def execute(self) -> bool:
         """Execute the script and return True if it executed successfully"""
@@ -317,4 +272,3 @@ def combine_scripts(*scripts: Union[bytes, 'Script'], json_transaction: dict, se
             else:
                 raise InvalidScriptException(f"Invalid script type: {type(script)}")
         return Script(bytes(combined), json_transaction, segwit=segwit)
-    
\ No newline at end of file
diff --git a/src/transaction.py b/src/transaction.py
index e432cde..42dd820 100644
--- a/src/transaction.py
+++ b/src/transaction.py
@@ -1,13 +1,12 @@
 import hashlib
 import json
 
-from ecdsa import VerifyingKey, SECP256k1, BadSignatureError
 from Crypto.Hash import RIPEMD160
 
-from src.script import Script, InvalidScriptException
+from src.script import Script
 from src.serialize import serialize_transaction
 from src.utils import decode_hex, get_filename_without_extension, hash160
-from src.verify import parse_der_signature_bytes, valid_transaction_syntax
+from src.verify import valid_transaction_syntax
 
 
 def calculate_txid(transaction_content, segwit=False):
diff --git a/src/verify.py b/src/verify.py
index 916149b..ad89e54 100644
--- a/src/verify.py
+++ b/src/verify.py
@@ -43,33 +43,3 @@ def valid_transaction_syntax(json_transaction):
             return False
         
     return True
-
-
-def parse_der_signature_bytes(der_signature):
-    # Parse the DER signature
-    if der_signature[0] != 0x30:
-        raise ValueError("Invalid DER signature format")
-
-    length = der_signature[1]
-    if length + 2 != len(der_signature):
-        raise ValueError("Invalid DER signature length")
-
-    if der_signature[2] != 0x02:
-        raise ValueError("Invalid DER signature format")
-
-    r_length = der_signature[3]
-    r = der_signature[4:4 + r_length]
-
-    if der_signature[4 + r_length] != 0x02:
-        raise ValueError("Invalid DER signature format")
-
-    s_length = der_signature[5 + r_length]
-    s = der_signature[6 + r_length:6 + r_length + s_length]
-
-    # Determine the hash type
-    if len(der_signature) > 6 + r_length + s_length:
-        hash_type = der_signature[-1]
-    else:
-        hash_type = 0x01  # Default to SIGHASH_ALL
-
-    return r, s, hash_type