get retrieves the value from the disk and returns. If the key does not exist then it returns an empty string Args:

set stores the key and value on the disk Args: key (str): the key value (str): the value

decode_header decodes the bytes into header using the `HEADER_FORMAT` format string Args: data (bytes): byte object containing t

decode_kv decodes the data bytes into appropriate KV pair Args: data (bytes): byte object containing the encoded KV data Return

encode_header encodes the data into bytes using the `HEADER_FORMAT` format string Args: timestamp (int): Timestamp at which we w

encode_kv encodes the KV pair into bytes Args: timestamp (int): Timestamp at which we wrote the KV pair to the disk. The value