Grasscutter

A WIP server reimplementation for some anime game 2.3-2.6

Documentation: Grasscutter Wiki
Note: For support please join the Discord server.

Current features

• Logging in
• Combat
• Spawning monsters via console
• Inventory features (recieving items/characters, upgrading items/characters, etc)
• Gacha system
• Friends list
• Co-op partially works

Quick setup guide

Note

• If you updated from an older version, delete config.json to regenerate it.

Prerequisites

• Java 16
• Mongodb (recommended 4.0+)
• Proxy daemon: mitmproxy (mitmdump, recommended), Fiddler Classic, etc.

Starting up Grasscutter server (Assuming you are on Windows)

1. Setup the compile environment with gradlew.bat
2. Compile Grasscutter with gradlew jar
3. Create a folder named resources in your Grasscutter directory, move your BinOutput and ExcelBinOutput folders there (Check the wiki for more details on how to get those.)
4. Run Grasscutter with java -jar grasscutter.jar. Make sure mongodb service is running as well.

Connecting with the client

½. Create an account using server console command below

1. Run a proxy daemon: (choose either one)
   • mitmdump: mitmdump -s proxy.py -k --allow-hosts ".*\.yuanshen\.com|.*\.mihoyo\.com|.*\.hoyoverse\.com"
   • 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, and load this script.
   • Hosts file
2. Trust CA certificate:
   • mitmdump: certutil -addstore root %USERPROFILE%\.mitmproxy\mitmproxy-ca-cert.cer
3. Set network proxy to 127.0.0.1:8080 or the proxy port you specified.
4. yoink

• or you can use start.cmd to start Server & Proxy daemon with one click

Grasscutter 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.

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.

spawn [monster id] [level] [amount]

give [item id] [amount] [level]

givechar [avatar id] [level]

drop [item id] [amount]

killall

setworldlevel [level] - Changes your world level, relog to see effects properly

godmode - Prevents you from taking damage

resetconst - Resets the constellation level on your currently selected character, will need to relog after using the command to see any changes.

setstats [stats] [amount] - Changes the currently selected character's specified stat.

clearartifacts - Deletes all unequipped and unlocked level 0 artifacts, including 5-star rarity ones from your inventory

pos - Gets your current coordinates.

weather [weather id] [climate id] - Changes the current weather.

More commands will be updated in the wiki.

Bonus

When you want to teleport somewhere, use the in-game marking function on the Map, click Confirm. You will see your character falling from a very high spot at the exact location you marked.

Quick Troubleshooting

• If compiling wasn't successful, please check your JDK installation (must be JDK 8 and validated JDK's bin PATH variable)
• My client doesn't connect, doesn't login, 4206, etc... - Mostly your proxy daemon setup is the issue, if you're using Fiddler make sure it's running on a port other than 8888
• Startup sequence: Mongodb > Grasscutter > Proxy daemon (mitmdump, fiddler, etc.) > Client