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Attention: We always welcome contributors to the project. Before adding your contribution, please carefully read our Code of Conduct.

Current features

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

Quick setup guide

Note: For support please join our Discord.

Requirements

• Java SE - 17 (link)

  Note: If you just want to run it, then jre only is fine.

• MongoDB (recommended 4.0+)

• Proxy daemon: mitmproxy (mitmdump, recommended), Fiddler Classic, etc.

Running

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

1. Get grasscutter.jar
   • Download from actions
   • Build by yourself
2. Create a resources folder in the directory where grasscutter.jar is located and move your BinOutput and ExcelBinOutput folders there (Check the wiki for more details how to get those.)
3. 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.

1. Redirect traffic: (choose one)

   • mitmdump: mitmdump -s proxy.py -k

     Trust CA certificate:

     ​ **Note:**The CA certificate is usually stored in % USERPROFILE%\ .mitmproxy, or you can download it from http://mitm.it

     ​ Double click for install or ...

     • Via command line

       certutil -addstore root %USERPROFILE%\.mitmproxy\mitmproxy-ca-cert.cer

   • 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. Set network proxy to 127.0.0.1:8080 or the proxy port you specified.

you can also use start.cmd to start servers and proxy daemons automatically

Building

Grasscutter uses Gradle to handle dependencies & building.

Requirements:

• Java SE Development Kits - 17
• Git

Windows

git clone https://github.com/Grasscutters/Grasscutter.git
cd Grasscutter
.\gradlew.bat # Setting up environments
.\gradlew jar # Compile

Linux

git clone https://github.com/Grasscutters/Grasscutter.git
cd Grasscutter
chmod +x gradlew
./gradlew jar # Compile

You can find the output jar in the root of the project folder.

Commands

You might want to use this command (java -jar grasscutter.jar -handbook) in a cmd that is in the grasscutter folder. It will create a handbook file (GM Handbook.txt) where you can find the item IDs for stuff you want

You may want to use this command (java -jar grasscutter.jar -gachamap) to generate a mapping file for the gacha record subsystem. The file will be generated to GRASSCUTTER_RESOURCE/gcstatic folder. Otherwise you may only see number IDs in the gacha record page.

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. to run commands ingame, you need to add prefix / or ! such as /pos

Targeting

1. For commands that target a Player, you can specify a target UID with @UID as an argument in any position to the command.
2. If you message a valid command at another player (instead of at the "Server" virtual player), they will be the target for that command if you didn't set one above.
3. If none of the above, it will default to a persistent target player you previously set using the command /target <UID>.
4. If none of the above, you will be the target of the command. If you are entering the command from the Server console, it will not work!

Note that performing commands on other players will usually require different a permission to the base permission node. e.g. player.give becomes player.give.others if used on another player.

Commands	Description	Alias	Targeting	Usage	Permission node
account	Creates an account with the specified username, and the in-game UID if specified.		Server only	account <create|delete> <username> [UID]
broadcast	Sends a message to all the players.	b	None	broadcast <message>	server.broadcast
coop	Forces someone to join the world of others.		Online Player	coop [host UID (default self)]	server.coop
changescene	Switch scenes by scene ID.	scene	Online Player	changescene <scene id>	player.changescene
clear	Deletes all unequipped and unlocked lvl0 artifacts(art)/weapons(wp)/material(mat) from inventory.		Online Player	clear <all|wp|art|mat>	player.clearinv
drop	Drops an item around you.	d dropitem	Online Player	drop <itemID|itemName> [amount]	server.drop
enterdungeon	Enter a dungeon by dungeon ID.		Online Player	enterdungeon <dungeon id>	player.enterdungeon
give	Gives item(s) to you or the specified player.	g item giveitem	Online Player	give <itemId|itemName> [amount] [level] [refinement]	player.give
giveall	Gives all items.	givea	Online Player	giveall [amount]	player.giveall
giveart	Gives the player a specified artifact.	gart	Online Player	giveart <artifactId> <mainPropId> [<appendPropId>[,<times>]]... [level]	player.giveart
givechar	Gives the player a specified character.	givec	Online Player	givechar <avatarId>	player.givechar
godmode	Prevents you from taking damage.		Online Player	godmode	player.godmode
heal	Heals all characters in your current team.	h	Online Player	heal	player.heal
help	Sends the help message or shows information about a specified command.		None	help [command]
kick	Kicks the specified player from the server.	k	Online Player	kick	server.kick
killall	Kills all entities in the current scene or specified scene of the corresponding player.		Online Player	killall [sceneId]	server.killall
list	Lists online players.		None	list
permission	Grants or removes a permission for a user.		Online Player	permission <add|remove> <permission>	permission
position	Sends your current coordinates.	pos	Online Player	position
reload	Reloads the server config.		None	reload	server.reload
resetconst	Resets currently selected (or all) character(s) to C0. Relog to see proper effects.	resetconstellation	Online Player	resetconst [all]	player.resetconstellation
restart	Restarts the current session.		None	restart
sendmessage	Sends a message to a player as the server.	say	Online Player	say <message>	server.sendmessage
setfetterlevel	Sets the friendship level for your currently selected character.	setfetterlvl	Online Player	setfetterlevel <level>	player.setfetterlevel
setstats	Sets a stat for your currently selected character.	stats	Online Player	setstats <stat> <value>	player.setstats
setworldlevel	Sets your world level. Relog to see proper effects.	setworldlvl	Online Player	setworldlevel <level>	player.setworldlevel
spawn	Spawns some entities around you.		Online Player	spawn <entityId> [amount] [level(monster only)]	server.spawn
stop	Stops the server.		None	stop	server.stop
talent	Sets talent level for your currently selected character		Online Player	talent <talentID> <value>	player.settalent
team	Add, remove, or swap avatars in your current team. Index start from 1.		Online Player	team <add|remove|set> [avatarId,...] [index	first
teleport	Change the player's position.	tp	Online Player	teleport <x> <y> <z> [sceneId]	player.teleport
tpall	Teleports all players in your world to your position.		Online Player	tpall	player.tpall
unlocktower	Unlock the all floors of abyss.	ut	Online Player	ut	player.tower
weather	Changes the weather.	w	Online Player	weather <weatherID> <climateID>	player.weather

Bonus

• Teleporting
  • When you want to teleport to somewhere, use the in-game marking function on Map.
    • Mark a point on the map using the fish hook marking (the last one.)
    • (Optional) rename the map marker to a number to override the default Y coordinate (height, default 300.)
    • Confirm and close the map.
    • You will see your character falling from a very high destination, exact location that you marked.

Quick Troubleshooting

• If compiling wasn't successful, please check your JDK installation (JDK 17 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 using Fiddler make sure it running on another port except 8888

• Startup sequence: Mongodb > Grasscutter > Proxy daemon (mitmdump, fiddler, etc.) > Game