# Grasscutter A WIP server emulator for Genshin Impact 2.3-2.6 **Note**: For support please join the [Discord server](https://discord.gg/T5vZU6UyeG). # Current features * Logging in * Spawning monsters via console * Combat * Inventory features (recieving items/characters, upgrading items/characters, etc) * Co-op does work, but movement is kind of buggy and some player ults do not spawn properly * Friends list * Gacha system # Running the server and client ### Prerequisites * JDK-8u202 ([mirror link since Oracle required an account to download old builds](https://mirrors.huaweicloud.com/java/jdk/8u202-b08/)) * Mongodb (recommended 4.0+) * Proxy daemon: mitmproxy (mitmdump, recommended), Fiddler Classic, etc. ### Starting up the server (Assuming you are on Windows) 1. Setup compile environment `gradlew.bat` 2. Compile the server with `gradlew jar` 3. Create a folder named `resources` in your server directory, you will need to copy `BinOutput`, `ExcelBinOutput` folders and `TextMap*.json` which you can get from a repo like [https://github.com/Dimbreath/GenshinData](https://github.com/Dimbreath/GenshinData) into your resources folder. 4. Run the server with `java -jar grasscutter.jar`. Make sure mongodb is running as well. ### Connecting with the client ½. Create an account using command below 1. Run a proxy daemon: - mitmdump: `mitmdump -s proxy.py --ssl-insecure` - Fiddler Classic: Run Fiddler Classic, turn on `Decrypt https traffic` in setting and change the default port there (Tools -> Options -> Connections) to anything other than `8888`, load [this script](https://github.lunatic.moe/fiddlerscript). - hosts: Redirect at least `api-account-os.hoyoverse.com` and `dispatchosglobal.yuanshen.com` to your dispatch server ip. 2. Trust CA certificate: - mitmdump: `certutil -addstore root %USERPROFILE%\.mitmproxy\mitmproxy-ca-cert.cer` 2. Set network proxy to `127.0.0.1:8080` or the proxy port you specified. 4. yoink * or you can use `run.cmd` to start Server & Proxy daemon with one click ### Server console commands `account create [username] {playerid}` - Creates an account with the specified username and the in-game uid for that account. The playerid parameter is optional and will be auto generated if not set. ### In-Game commands There is a dummy user named "Server" in every player's friends list that you can message to use commands. Commands also work in other chat rooms, such as private/team chats. `!spawn [monster id] [level] [amount]` `!give [item id] [amount]` `!drop [item id] [amount]` `!killall` `!godmode` - Prevents you from taking damage `!resetconst` - Resets the constellation level on your current active character, will need to relog after using the command to see any changes. `!sethp [hp]` `!clearartifacts` - Deletes all unequipped and unlocked level 0 artifacts, **including yellow rarity ones** from your inventory ### Quick Troubleshooting * If compiling wasnt successful, please check your JDK installation (must be JDK 8 and JDK's bin PATH variable is correct) * My client doesn't connect, doesn't login, 4206, etc... - Mostly your fiddler is the issue, make sure it running on another port except 8888 * Startup sequence: Mongodb > The server > Proxy daemon (mitmdump, fiddler, etc.) > Client * If `4206` error constantly prompt up, try to use [jdk-8u202-b08](https://mirrors.huaweicloud.com/java/jdk/8u202-b08/) instead of other versions of JDK