[Script] PearlBlockThrow ?

Q13

who can implement a script that allows the use of pearls where prohibited?
ThunderHack-Recode/src

commandblock2

This is a somewhat faithful transplation of the original source code, which would not work on 1.8.x, this should desync your inventory too.


function __require(path) {
    if (path.startsWith("@embedded")) {
        return globalThis
    }

    if (path.startsWith("@minecraft-yarn-definitions/types/")) {
        return {
            [path.substring(path.lastIndexOf("/") + 1)]: Java.type(path
                .replaceAll("@minecraft-yarn-definitions/types/", "")
                .replaceAll("/", ".")
            )
        }
    }
    return require(path);
}
var exports = {}

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
// imports
/* eslint-disable unused-imports/no-unused-imports */
const _embedded_1 = __require("@embedded");
/* eslint-enable unused-imports/no-unused-imports */
// DO NOT TOUCH ANYTHING ABOVE THIS LINE, also not sure why it didn't work
const PlayerInteractItemC2SPacket_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/network/packet/c2s/play/PlayerInteractItemC2SPacket");
const UpdateSelectedSlotC2SPacket_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/network/packet/c2s/play/UpdateSelectedSlotC2SPacket");
const UpdateSelectedSlotS2CPacket_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/network/packet/s2c/play/UpdateSelectedSlotS2CPacket");
const Items_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/item/Items");
const Hand_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/util/Hand");
const script = _embedded_1.registerScript.apply({
    name: "no-pearl-use",
    version: "1.0.0",
    authors: ["commandblock2"]
});
script.registerModule({
    name: "no-pearl-use",
    description: "cancels ender pearl use",
    category: "Player",
}, (mod) => {
    var slot = 0;
    mod.on("enable", () => {
        var _a, _b;
        slot = (_b = (_a = _embedded_1.mc.player) === null || _a === void 0 ? void 0 : _a.inventory.selectedSlot) !== null && _b !== void 0 ? _b : 0;
    });
    mod.on("packet", (event) => {
        var _a;
        if (event.packet instanceof UpdateSelectedSlotS2CPacket_1.UpdateSelectedSlotS2CPacket) {
            slot = event.packet.slot();
        }
        if (event.packet instanceof UpdateSelectedSlotC2SPacket_1.UpdateSelectedSlotC2SPacket) {
            slot = event.packet.selectedSlot;
        }
        if (event.packet instanceof PlayerInteractItemC2SPacket_1.PlayerInteractItemC2SPacket &&
            ((_a = _embedded_1.mc.player) === null || _a === void 0 ? void 0 : _a.inventory.main[slot].item) == Items_1.Items.ENDER_PEARL) {
            // use reflection to set the hand to offhand
            const field = event.packet.class.getDeclaredField("hand");
            field.setAccessible(true);
            field.set(event.packet, Hand_1.Hand.OFF_HAND);
            _embedded_1.Client.displayChatMessage(`§cPearl use changed to hand ${event.packet.hand}`);
        }
    });
});

original typescript code

// imports
/* eslint-disable unused-imports/no-unused-imports */
import {
    Setting,
    Vec3i,
    Vec3d,
    MathHelper,
    BlockPos,
    Hand,
    RotationAxis,
    mc,
    Client,
    RotationUtil,
    ItemUtil,
    NetworkUtil,
    InteractionUtil,
    BlockUtil,
    MovementUtil,
    ReflectionUtil,
    ParameterValidator,
    UnsafeThread,
    registerScript
} from "@embedded";
/* eslint-enable unused-imports/no-unused-imports */
// DO NOT TOUCH ANYTHING ABOVE THIS LINE, also not sure why it didn't work

import { PlayerInteractItemC2SPacket } from "@minecraft-yarn-definitions/types/net/minecraft/network/packet/c2s/play/PlayerInteractItemC2SPacket";
import { UpdateSelectedSlotC2SPacket } from "@minecraft-yarn-definitions/types/net/minecraft/network/packet/c2s/play/UpdateSelectedSlotC2SPacket";
import { UpdateSelectedSlotS2CPacket } from "@minecraft-yarn-definitions/types/net/minecraft/network/packet/s2c/play/UpdateSelectedSlotS2CPacket";
import { Items } from "@minecraft-yarn-definitions/types/net/minecraft/item/Items";
import { Hand as MCHand } from "@minecraft-yarn-definitions/types/net/minecraft/util/Hand";

const script = registerScript.apply({
    name: "no-pearl-use",
    version: "1.0.0",
    authors: ["commandblock2"]
});

script.registerModule({
    name: "no-pearl-use",
    description: "cancels ender pearl use", 
    category: "Player",
}, (mod) => {

    var slot = 0

    mod.on("enable", () => {
        slot = mc.player?.inventory.selectedSlot ?? 0;
    })

    mod.on("packet", (event) => {

        if (event.packet instanceof UpdateSelectedSlotS2CPacket) {
            slot = event.packet.slot();
        }

        if (event.packet instanceof UpdateSelectedSlotC2SPacket) {
            slot = event.packet.selectedSlot;
        }


        if (event.packet instanceof PlayerInteractItemC2SPacket &&
            mc.player?.inventory.main[slot].item == Items.ENDER_PEARL
        ) {
            // use reflection to set the hand to offhand
            const field = (event.packet as any).class.getDeclaredField("hand"); 
            field.setAccessible(true);
            field.set(event.packet, MCHand.OFF_HAND);
            Client.displayChatMessage(`§cPearl use changed to hand ${event.packet.hand}`);
        }
    })
})

This will indeed cancel the usage of the pearl on 1.8.x protocols



function __require(path) {
    if (path.startsWith("@embedded")) {
        return globalThis
    }

    if (path.startsWith("@minecraft-yarn-definitions/types/")) {
        return {
            [path.substring(path.lastIndexOf("/") + 1)]: Java.type(path
                .replaceAll("@minecraft-yarn-definitions/types/", "")
                .replaceAll("/", ".")
            )
        }
    }
    return require(path);
}
var exports = {}

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
// imports
/* eslint-disable unused-imports/no-unused-imports */
const _embedded_1 = __require("@embedded");
/* eslint-enable unused-imports/no-unused-imports */
// DO NOT TOUCH ANYTHING ABOVE THIS LINE, also not sure why it didn't work
const PlayerInteractItemC2SPacket_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/network/packet/c2s/play/PlayerInteractItemC2SPacket");
const UpdateSelectedSlotC2SPacket_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/network/packet/c2s/play/UpdateSelectedSlotC2SPacket");
const UpdateSelectedSlotS2CPacket_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/network/packet/s2c/play/UpdateSelectedSlotS2CPacket");
const Items_1 = __require("@minecraft-yarn-definitions/types/net/minecraft/item/Items");
const script = _embedded_1.registerScript.apply({
    name: "no-pearl-use",
    version: "1.0.0",
    authors: ["commandblock2"]
});
script.registerModule({
    name: "no-pearl-use",
    description: "cancels ender pearl use",
    category: "Player",
}, (mod) => {
    var slot = 0;
    mod.on("enable", () => {
        var _a, _b;
        slot = (_b = (_a = _embedded_1.mc.player) === null || _a === void 0 ? void 0 : _a.inventory.selectedSlot) !== null && _b !== void 0 ? _b : 0;
    });
    mod.on("packet", (event) => {
        var _a;
        if (event.packet instanceof UpdateSelectedSlotS2CPacket_1.UpdateSelectedSlotS2CPacket) {
            slot = event.packet.slot();
        }
        if (event.packet instanceof UpdateSelectedSlotC2SPacket_1.UpdateSelectedSlotC2SPacket) {
            slot = event.packet.selectedSlot;
        }
        if (event.packet instanceof PlayerInteractItemC2SPacket_1.PlayerInteractItemC2SPacket &&
            ((_a = _embedded_1.mc.player) === null || _a === void 0 ? void 0 : _a.inventory.main[slot].item) == Items_1.Items.ENDER_PEARL) {
            event.cancelEvent();
        }
    });
});

This will desync your inventory with the server anyway, but it is true that no end pearl will be thrown if you have one in your hand (unless u have a pearl in server side but not client side). Can be used as a example.
Later is the original ts file.

// imports
/* eslint-disable unused-imports/no-unused-imports */
import {
    Setting,
    Vec3i,
    Vec3d,
    MathHelper,
    BlockPos,
    Hand,
    RotationAxis,
    mc,
    Client,
    RotationUtil,
    ItemUtil,
    NetworkUtil,
    InteractionUtil,
    BlockUtil,
    MovementUtil,
    ReflectionUtil,
    ParameterValidator,
    UnsafeThread,
    registerScript
} from "@embedded";
/* eslint-enable unused-imports/no-unused-imports */
// DO NOT TOUCH ANYTHING ABOVE THIS LINE, also not sure why it didn't work

import { PlayerInteractItemC2SPacket } from "@minecraft-yarn-definitions/types/net/minecraft/network/packet/c2s/play/PlayerInteractItemC2SPacket";
import { UpdateSelectedSlotC2SPacket } from "@minecraft-yarn-definitions/types/net/minecraft/network/packet/c2s/play/UpdateSelectedSlotC2SPacket";
import { UpdateSelectedSlotS2CPacket } from "@minecraft-yarn-definitions/types/net/minecraft/network/packet/s2c/play/UpdateSelectedSlotS2CPacket";
import { Items } from "@minecraft-yarn-definitions/types/net/minecraft/item/Items";

const script = registerScript.apply({
    name: "no-pearl-use",
    version: "1.0.0",
    authors: ["commandblock2"]
});

script.registerModule({
    name: "no-pearl-use",
    description: "cancels ender pearl use", 
    category: "Player",
}, (mod) => {

    var slot = 0

    mod.on("enable", () => {
        slot = mc.player?.inventory.selectedSlot ?? 0;
    })

    mod.on("packet", (event) => {

        if (event.packet instanceof UpdateSelectedSlotS2CPacket) {
            slot = event.packet.slot();
        }

        if (event.packet instanceof UpdateSelectedSlotC2SPacket) {
            slot = event.packet.selectedSlot;
        }


        if (event.packet instanceof PlayerInteractItemC2SPacket &&
            mc.player?.inventory.main[slot].item == Items.ENDER_PEARL
        ) {
            event.cancelEvent();
        }
    })
})

LiquidBounce Forum

[Script] PearlBlockThrow ?

This will indeed cancel the usage of the pearl on 1.8.x protocols

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