greendou / grasscutter

A server software reimplementation for a certain anime game.

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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

Commands	Usage	Permission node	Availability	description	Alias
account	account <create|delete> <username> [UID]		Server only	Creates an account with the specified username and the in-game UID for that account. The UID will be auto generated if not set.
broadcast	broadcast <message>	server.broadcast	Both side	Sends a message to all the players.	b
coop	coop <playerId> <target playerId>	server.coop	Both side	Forces someone to join the world of others.
changescene	changescene <scene id>	player.changescene	Client only	Switch scenes by scene ID.	scene
clear	clear <all|wp|art|mat> [UID]	player.clearinv	Client only	Deletes all unequipped and unlocked level 0 artifacts(art)/weapons(wp)/material(all) or all, including 5-star rarity ones from your inventory.	clear
drop	drop <itemID|itemName> [amount]	server.drop	Client only	Drops an item around you.	d dropitem
enterdungeon	enterdungeon <dungeon id>	player.enterdungeon	Client only	Enter a dungeon by dungeon ID
give	give [player] <itemId|itemName> [amount] [level] [finement]	player.give	Both side	Gives item(s) to you or the specified player. (finement option only weapon.)	g item giveitem
givechar	givechar <uid> <avatarId>	player.givechar	Both side	Gives the player a specified character.	givec
giveart	giveart [player] <artifactId> <mainPropId> [<appendPropId>[,<times>]]... [level]	player.giveart	Both side	Gives the player a specified artifact.	gart
giveall	giveall [uid] [amount]	player.giveall	Both side	Gives all items.	givea
godmode	godmode [uid]	player.godmode	Client only	Prevents you from taking damage.
heal	heal	player.heal	Client only	Heals all characters in your current team.	h
help	help [command]		Both side	Sends the help message or shows information about a specified command.
kick	kick <player>	server.kick	Both side	Kicks the specified player from the server. (WIP)	k
killall	killall [playerUid] [sceneId]	server.killall	Both side	Kills all entities in the current scene or specified scene of the corresponding player.
list	list		Both side	Lists online players.
permission	permission <add|remove> <UID> <permission>	*	Both side	Grants or removes a permission for a user.
position	position		Client only	Sends your current coordinates.	pos
reload	reload	server.reload	Both side	Reloads the server config
resetconst	resetconst [all]	player.resetconstellation	Client only	Resets the constellation level on your currently selected character, will need to relog after using the command to see any changes.	resetconstellation
restart			Both side	Restarts the current session
say	say <player> <message>	server.sendmessage	Both side	Sends a message to a player as the server	sendservmsg sendservermessage sendmessage
setfetterlevel	setfetterlevel <level>	player.setfetterlevel	Client only	Sets the friendship level for your currently selected character	setfetterlvl
setstats	setstats <stat> <value>	player.setstats	Client only	Sets a stat for your currently selected character	stats
setworldlevel	setworldlevel <level>	player.setworldlevel	Client only	Sets your world level (Relog to see proper effects)	setworldlvl
spawn	spawn <entityId> [amount] [level(monster only)]	server.spawn	Client only	Spawns some entities around you
stop	stop	server.stop	Both side	Stops the server
talent	talent <talentID> <value>	player.settalent	Client only	Sets talent level for your currently selected character
teleport	teleport [@playerUid] <x> <y> <z> [sceneId]	player.teleport	Both side	Change the player's position.	tp
tpall		player.tpall	Client only	Teleports all players in your world to your position
weather	weather <weatherID> <climateID>	player.weather	Client only	Changes the weather	w

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