secret-4-capturetheflag-solution.py

from ed25519_axolotl import (validate_signature, fast_signature)

# This is the master public key for the Secret-4 blockchain.
consensus_io_exchange_pubkey = \
    bytes.fromhex("083b1a03661211d5a4cc8d39a77795795862f7730645573b2bcc2c1920c53c04")

message = """
I have captured the Secret-4 consensus_seed flag!
Let's sign the logbook then dispose of this toxic waste.
   -- Andrew Miller
      Decentralized Systems Lab
      October 6, 2022
"""

signature = bytes.fromhex("e8a9ebb32e9670801d557038e60c07a8c7abc9dddddfca0a50b850cbf880e298"+
                          "a26647e7f77a72a222af2926ca13a4d71f997bcc64f7670f9a51c91ea502c903")

assert validate_signature(consensus_io_exchange_pubkey, message.encode('utf-8'), signature)
print(message)
print('Signature Ok')