Inventory Hunter

This bot helped me snag an RTX 3070... hopefully it will help you get your hands on your next CPU, GPU, or game console.

Requirements

Raspberry Pi 2 or newer (alternatively, you can use an always-on PC or Mac)
Docker (tutorial)

You will also need one of the following:

Quick Start

For instructions specific to Windows, please see this guide instead: Instructions for Windows

These steps should work on any supported Docker platform, but they have been specifically tested on Raspberry Pi OS with Docker already installed.

Clone this repository and pull the latest image from Docker Hub:

pi@raspberrypi:~
$ git clone https://github.com/EricJMarti/inventory-hunter

pi@raspberrypi:~
$ cd inventory-hunter

pi@raspberrypi:~/inventory-hunter
$ docker pull ericjmarti/inventory-hunter:latest

Create your own configuration file based on one of the provided examples:

Start the Docker container using the provided docker_run.bash script, specifying the required arguments.

If using Discord or Slack, the format of your command will look like this:

$ ./docker_run.bash -c <config_file> -a <discord_or_slack> -w <webhook_url>

# Discord example:
pi@raspberrypi:~/inventory-hunter
$ ./docker_run.bash -c ./config/newegg_rtx_3070.yaml -a discord -w https://discord.com/api/webhooks/...

If using an SMTP relay, the format of your command will look like this:

$ ./docker_run.bash -c <config_file> -e <email_address> -r <relay_ip_address>

# SMTP example:
pi@raspberrypi:~/inventory-hunter
$ ./docker_run.bash -c ./config/newegg_rtx_3070.yaml -e myemail@email.com -r 127.0.0.1

Getting New Code

First identify any running container names related to inventory-hunter
```
$ docker ps
```
Stop and remove all containers related to inventory-hunter
```
$ docker stop CONTAINER_NAME
$ docker rm CONTAINER_NAME
```
Pull repo updates
```
$ git pull
```

Rerun the docker_run.bash command to start containers back up with updates.

$ ./docker_run.bash -c <config_file> -a <discord_or_slack> -w <webhook_url>

Configuring Alerters

If you are interested in configuring multiple alerters or would like to keep your alerter settings saved in a file, you can configure inventory-hunter's alerting mechanism using a config file similar to the existing scraper configs.

Create a file called alerters.yaml in the config directory.

Configure the alerters you would like to use based on this example:

---
alerters:
  discord:
    webhook_url: https://discord.com/api/webhooks/XXXXXXXXXXXX...
    mentions:
      - XXXXXXXXXXXXXXX
      - XXXXXXXXXXXXXXX
  telegram:
    webhook_url: https://api.telegram.org/botXXXXXXXXXXXXXXXXXXXX/sendMessage
    chat_id: XXXXXXXX
  email:
    sender: myemail@email.com
    recipients:
      - myemail@email.com
      - myfriendsemail@email.com
    relay: 127.0.0.1
    password: XXXXXXXXXX   # optional
...

Add this config file to your run command:

pi@raspberrypi:~/inventory-hunter
$ ./docker_run.bash -c ./config/newegg_rtx_3070.yaml -q ./config/alerters.yaml

How it works

The general idea is if you can get notified as soon as a product becomes in stock, you might have a chance to purchase it before scalpers clear out inventory. This script continually refreshes a set of URLs, looking for the "add to cart" phrase. Once detected, an automated alert is sent, giving you an opportunity to react.

FAQ

How is this different from existing online inventory trackers?

Before developing inventory-hunter, I used several existing services without any luck. By the time I received an alert, the product had already been scalped. This bot alerts faster than existing trackers for several reasons:

it runs on your own hardware, so no processing time is spent servicing other users
you get to choose which products you want to track
you are in control of the refresh frequency

What if inventory-hunter gets used by scalpers?

I sure hope this doesn't happen... 2020 is bad enough already. My hope is that inventory-hunter levels the playing field a bit by giving real customers a better opportunity than they had previously. Serious scalpers will continue using automated checkout bots, and it is up to online retailers to combat this malarkey.

Do I really need Docker?

No, but I highly recommend it. If you know your way around python and pip/conda, then you should be able to replicate the environment I created using Docker.

hartmms/inventory-hunter