{
    "stream_maps": {
        "customers": { // Apply these transforms to the stream called 'customers'
            "email": null, // drop the PII field from RECORD and SCHEMA messages
            "email_domain": "owner_email.split('@')[-1]", // capture just the email domain
            "email_hash": "md5(config['hash_seed'] + owner_email)", // for uniqueness checks
        }
    },
    "stream_map_config": {
        // hash outputs are not able to be replicated without the original seed:
        "hash_seed": "01AWZh7A6DzGm6iJZZ2T"
    }
}