def load_file(filename) -> bytes:
    with open(filename, 'rb') as file:
        content = file.read()
    return content


def load_key(filename) -> "RsaKey":
    try:
        # Crypto | Cryptodome on Debian
        from Crypto.PublicKey import RSA
        from Crypto.PublicKey.RSA import RsaKey
    except ModuleNotFoundError:
        from Cryptodome.PublicKey import RSA
        from Cryptodome.PublicKey.RSA import RsaKey

    return RSA.import_key(extern_key=load_file(filename), passphrase=None)


def generate_key() -> "RsaKey":
    try:
        # Crypto | Cryptodome on Debian
        from Crypto.PublicKey import RSA
        from Crypto.PublicKey.RSA import RsaKey
    except ModuleNotFoundError:
        from Cryptodome.PublicKey import RSA
        from Cryptodome.PublicKey.RSA import RsaKey

    return RSA.generate(bits=2048)


def ha_replicate(logger: "logging.Logger", ha_replicate: str, ha_role: str, version: str, dls_url: str, dls_port: int, site_key_xid: str, instance_ref: str, origins: list["Origin"], leases: list["Lease"]):
    from datetime import datetime
    import httpx

    data = {
        'VERSION': str(version),
        'HA_REPLICATE': f'{dls_url}:{dls_port}',
        'SITE_KEY_XID': str(site_key_xid),
        'INSTANCE_REF': str(instance_ref),
        'origins': [origin.serialize() for origin in origins],
        'leases': [lease.serialize() for lease in leases],
        'cur_time': datetime.utcnow(),
    }

    r = httpx.put(f'https://{ha_replicate}/-/ha/replicate', json=data)
    if r.status_code == 202:
        logger.info(f'Successfully replicated this node ({ha_role}) to "{ha_replicate}".')
    else:
        logger.error(f'Failed to replicate this node ({ha_role}) to "{ha_replicate}": {r.status_code} - {r.content}')