steam-market:在Steam市场上寻找套利

# Steam Market [![Build status][build-image]][build] [![Updates][dependency-image]][pyup] [![Python 3][python3-image]][pyup] [![Code coverage][codecov-image]][codecov] [![Code Quality][codacy-image]][codacy] This repository contains Python code to find arbitrages on the Steam Market.  Arbitrages could consist in: - purchasing gems to craft booster packs, which are then immediately sold for more than their crafting cost, - purchasing items, typically foil cards, which are then immediately turned into more gems than they are worth, - purchasing games in order to produce the corresponding booster packs, with total profit greater than the game price, - turning normal cards into badges, if the expected value is positive, to create items worth more than the badge cost. ## Requirements - Install the latest version of [Python 3.X](https://www.python.org/downloads/). - Install the required packages: ```bash pip install -r requirements.txt ``` ## Data acquisition ### Cookie To relax the rate limits enforced by Steam API, fill-in your cookie information in a file called `personal_info.json`: 1. To do so, make sure you are connected to your Steam account on a Steam Community page, e.g. [Steam Market](https://steamcommunity.com/market/).<br/>  2. Press `<Shift-F9>` in your web browser to access the storage section of the developer tools.<br/>  3. Use the filtering option (in the top right of the storage section) to find the cookie value for `steamLoginSecure`.<br/>  4. Copy-paste this cookie value into a new file called `personal_info.json`, which will be read by [`personal_info.py`](personal_info.py).<br/> ```json { "steamLoginSecure": "PASTE_YOUR_COOKIE_VALUE_HERE" } ``` > **NB**: In the future, if you notice that the program bugs out due to seemingly very strict rate limits, then it may be a sign that the cookie value tied to your session has changed. In this case, try to fill-in your cookie information with its new value. > **NB²**: If you want to automate the creation and sale of booster packs, you may need: > 1. to have a [mobile authenticator app](https://github.com/Jessecar96/SteamDesktopAuthenticator) running in the background and auto-confirming market transactions, > 2. to fill-in more cookie information. I have been using the following entries, but you might not need to use all of them. Except for `steamLoginSecure` and `sessionid`, the values of the other entries are set in stone and do not need to be updated afterwards. > ```json > { > "browserid": "PASTE_YOUR_COOKIE_VALUE_HERE", > "steamMachineAuth_PASTE_YOUR_STEAM_ID_HERE": "PASTE_YOUR_COOKIE_VALUE_HERE", > "steamRememberLogin": "PASTE_YOUR_COOKIE_VALUE_HERE", > "sessionid": "PASTE_YOUR_COOKIE_VALUE_HERE", > "steamLoginSecure": "PASTE_YOUR_COOKIE_VALUE_HERE" > } > ``` ### Gem cost for crafting Booster Packs To have access to the gem cost for crafting Booster Packs, you will need to manually copy information available [here](https://steamcommunity.com/tradingcards/boostercreator/). There are two solutions: - solution A is my original solution, but it requires a browser extension called *Augmented Steam*, - solution B is a more recent solution, and does not require any third-party browser extension. #### Solution A 1. Install the browser extension called [*Augmented Steam*](https://es.isthereanydeal.com/), so that the number of gems required to craft a Booster Pack appears in the drop-down menu:<br/>  2. Then, right-click the drop-down menu and "inspect" the corresponding HTML code in your browser:<br/>  3. Copy the following line and paste it to `data/booster_game_creator.txt`:<br/>  4. Add line-breaks, so that the file is formatted in the following way:<br/>  For instance, with [Visual Studio Code](https://code.visualstudio.com/), press `<Ctrl-H>` and run:<br/>  5. Strip the following unnecessary lines: - three lines (including an empty line) at the beginning: ```html <select id="booster_game_selector"> <option value="">Select a game...</option> ``` - one line at the end: ```html </select> ``` #### Solution B Alternatively, if you wish not to install any browser extension: 1. Press `<Ctrl-U>` to display the HTML code of [the Booser Creation webpage](https://steamcommunity.com/tradingcards/boostercreator/). 2. At the end of the HTML code, find and copy the line below `CBoosterCreatorPage.Init`:<br/>  3. Paste the line to `data/booster_game_creator_from_javascript.txt`. 4. Strip mentions of packs unavailable because they were crafted less than 24 hours ago. For instance: ```json {"appid":996580,"name":"Spyro\u2122 Reignited Trilogy","series":1,"price":"400", "unavailable":true,"available_at_time":"4 Sep @ 7:06pm"} ``` should be replaced with: ```json {"appid":996580,"name":"Spyro\u2122 Reignited Trilogy","series":1,"price":"400"} ``` To do so, with [Visual Studio Code](https://code.visualstudio.com/), press `<Ctrl-H>` and remove occurences of :<br/>  ```regexp ,"unavailable":true,"available_at_time":"[\w ]*@[\w :]*" ``` ## Usage - To parse all the options to craft 'Booster Packs', for the games you own, run: ```bash python parsing_utils.py ``` - To retrieve all the listings of 'Booster Packs' on the Steam Market, along with the sell price and volume, run: ```bash python market_search.py ``` - To retrieve the price which sellers ask for a ['Sack of Gems'](https://steamcommunity.com/market/listings/753/753-Sack%20of%20Gems), run: ```bash python sack_of_gems.py ``` - To retrieve i) the "item name id" of a listing, and ii) whether a *crafted* item would really be marketable, run: ```bash python market_listing.py ``` - To match listing hashes with badge creation details, run: ```bash python market_utils.py ``` - To retrieve the ask and bid for 'Booster Packs', run: ```bash python market_order.py ``` - To look for **free** games which i) feature trading cards (and thus crafting of booster packs), and ii) which I do not own, run: ```bash python free_games_with_trading_cards.py ``` - To create packs for a **manual** selection of games, e.g. if you want to create these specific packs every day, run: ```bash python batch_create_packs.py ``` - To list appIDs of interest for which we can under-cut the lowest sell order and still hope to make a profit: ```bash python list_possible_lures.py ``` - To look for games which i) are likely to have high bid orders for their booster packs, and ii) which I may not own yet, run: ```bash python market_buzz_detector.py ``` - To look for potentially profitable gambles on profile backgrounds and emoticons of "Common" rarity, run: ```bash python market_gamble_detector.py ``` - To find market arbitrages, e.g. sell a pack for more (fee excluded) than the cost to craft it (fee included), run: ```bash python market_arbitrage.p