Some captcha bot on Telegram requires you to pay to be used on groups with 1000+ members. Some is just so bad, bots can bypass through them.
We made something that's can't be bypassed by bots and free of cost.
The full-version one has more dependencies, database connections (CockroachDB, MongoDB, and Redis), and a constant worker that logs the group. Yet, it only runs on a free VM on fly.io which only has 1 shared vCPU, 3GB volume storage, and 256 MB of RAM.
Well, the point is: if the full-blown version is running on a very low-end VM and still be able to handle lots and lots of traffic (yes, we had an encounter of spam bots joining our server before), this one should use even less resources!
Before you deploy the bot, you'll need to setup some environment variables to make everything works. See Environment Variables section.
The easiest way to deploy the bot is through Docker.
docker build -t teknologi-umum/captcha-lite .
docker run teknologi-umum/captcha-lite
You can use Heroku or Fly.io to deploy the app. We've provided the corresponding configuration file.
Or if you prefer to build everything from source.
# We assume you've installed Go 1.18 or higher (https://go.dev/dl)
go build .
./teknologi-umum-bot
Or run the teknologi-umum-bot binary file through systemd or supervisord.
- ENVIRONMENT: denotes the environment stage. Available options: "development" / "production"
- BOT_TOKEN: Your Telegram bot token that is acquired from BotFather
- LANGUAGE: The language of the bot. Available options: "ID" (for Indonesian) / "EN" (for English) Defaults to "EN"
- LOG_PROVIDER: Error log provider.
Available options:
- "noop" -- stands for no-operation. It literally do nothing.
- "sentry" -- See https://sentry.io/
- "rollbar" -- See https://rollbar.com/
- SENTRY_DSN: Sentry's DSN URL. Required if using "sentry" as the LOG_RPOVIDER
- ROLLBAR_TOKEN: Rollbar's token. Required if using "rollbar" as the LOG_PROVIDER
- ROLLBAR_SERVERHOST: Rollbar's server host. Required if using "rollbar" as the LOG_PROVIDER
- ROLLBAR_SERVERROOT: Rollbar's server root. Required if using "rollbar" as the LOG_PROVIDER
MIT License
Copyright © 2022 Teknologi Umum <opensource@teknologiumum.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.