--- a/src/bitcaviar_plus/search.py	Thu Jan 06 12:10:25 2022 +0000
+++ b/src/bitcaviar_plus/search.py	Wed Feb 02 21:16:10 2022 +0100
@@ -1,4 +1,74 @@
-
 """
 Search methods for LEVELDB database
-"""
\ No newline at end of file
+"""
+
+try:
+    # noinspection PyUnresolvedReferences
+    import plyvel
+except ImportError:
+    # Avoid import error running unit tests
+    print("Couldn't import plyvel package. Are you running unit tests?")
+
+import tempfile
+
+
+def search_block_with(block_hash):
+    """
+    Search block with a given hash and get value
+    :param block_hash: string, required
+    :return: string
+    """
+
+    db = level_db_connect()
+    search_type = bytes.fromhex('62')  # 'b' (block) in hex is 62
+    block_hash = bytes.fromhex(block_hash)[::-1]
+    key = search_type + block_hash
+    value = db.get(key)
+    db.close()
+
+    return value.hex()
+
+
+# ---- SECONDARY METHODS ----
+
+def deserialize_block_search(f):
+    """
+    Deserialize value (block search)
+    More info: https://bitcoin.stackexchange.com/questions/67515/format-of-a-block-keys-contents-in-bitcoinds-leveldb
+    :param f: buffer, required
+    :return: dict
+    """
+
+    client_number = f.read(3)
+    print('Client number: {}'.format(client_number.hex()))
+    block_height = f.read(1)  # Var int 128?
+    print('Block height: {}'.format(block_height.hex()))
+    status = f.read(1)  # var int 128?
+    print('Status: {}'.format(status.hex()))
+    number_of_transactions = f.read(1)  # var int 128?
+    print('Number of transactions: {}'.format(number_of_transactions.hex()))
+
+
+def create_file_with(binary):
+    with tempfile.TemporaryFile() as fp:
+        fp.write(binary)
+        fp.seek(0)
+
+    return fp
+
+
+# noinspection PyUnresolvedReferences
+def level_db_connect():
+    db = plyvel.DB('/bitcoin-node/.bitcoin/blocks/index/', create_if_missing=False)
+
+    return db
+
+
+def get_128_var_int(f):
+    """
+    This var int is different from helpers.get_var_int
+    :param f:
+    :return: string
+    """
+
+    pass