import json
import os

KEY_FILE = "keys.json"

def load_keys():
    if os.path.exists(KEY_FILE):
        with open(KEY_FILE, "r") as f:
            return json.load(f)
    return {}

def save_keys(keys):
    with open(KEY_FILE, "w") as f:
        json.dump(keys, f, indent=2)

def revoke_key(key):
    keys = load_keys()
    if key in keys:
        del keys[key]
        save_keys(keys)
        return True
    return False

def validate_key_format(key):
    return key.startswith("aw-ay-") and len(key.split("-")) == 3