feat(nitroBypass): add sticker bypass (#184)

Co-authored-by: Vendicated <vendicated@riseup.net>

src/api/MessageEvents.ts

@@ -37,25 +37,33 @@ export interface MessageObject {
     validNonShortcutEmojis: Emoji[];
 }
 
-export type SendListener = (channelId: string, messageObj: MessageObject, extra: any) => void;
+export interface MessageExtra {
+    stickerIds?: string[];
+}
+
+export type SendListener = (channelId: string, messageObj: MessageObject, extra: MessageExtra) => void | { cancel: boolean };
 export type EditListener = (channelId: string, messageId: string, messageObj: MessageObject) => void;
 
 const sendListeners = new Set<SendListener>();
 const editListeners = new Set<EditListener>();
 
-export function _handlePreSend(channelId: string, messageObj: MessageObject, extra: any) {
+export function _handlePreSend(channelId: string, messageObj: MessageObject, extra: MessageExtra) {
     for (const listener of sendListeners) {
         try {
-            listener(channelId, messageObj, extra);
-        } catch (e) { MessageEventsLogger.error(`MessageSendHandler: Listener encoutered an unknown error. (${e})`); }
+            const result = listener(channelId, messageObj, extra);
+            if (result && result.cancel === true) {
+                return true;
+            }
+        } catch (e) { MessageEventsLogger.error("MessageSendHandler: Listener encountered an unknown error\n", e); }
     }
+    return false;
 }
 
-export function _handlePreEdit(channeld: string, messageId: string, messageObj: MessageObject) {
+export function _handlePreEdit(channelId: string, messageId: string, messageObj: MessageObject) {
     for (const listener of editListeners) {
         try {
-            listener(channeld, messageId, messageObj);
-        } catch (e) { MessageEventsLogger.error(`MessageEditHandler: Listener encoutered an unknown error. (${e})`); }
+            listener(channelId, messageId, messageObj);
+        } catch (e) { MessageEventsLogger.error("MessageEditHandler: Listener encountered an unknown error\n", e); }
     }
 }
 
@@ -90,7 +98,7 @@ export function _handleClick(message: Message, channel: Channel, event: MouseEve
     for (const listener of listeners) {
         try {
             listener(message, channel, event);
-        } catch (e) { MessageEventsLogger.error(`MessageClickHandler: Listener encoutered an unknown error. (${e})`); }
+        } catch (e) { MessageEventsLogger.error("MessageClickHandler: Listener encountered an unknown error\n", e); }
     }
 }
 

src/globals.d.ts

@@ -21,7 +21,7 @@ declare global {
     /**
      * This exists only at build time, so references to it in patches should insert it
      * via String interpolation OR use different replacement code based on this
-     * but NEVER refrence it inside the patched code
+     * but NEVER reference it inside the patched code
      *
      * @example
      * // BAD

src/plugins/apiMessageEvents.ts

@@ -28,7 +28,7 @@ export default definePlugin({
             find: "sendMessage:function",
             replacement: [{
                 match: /(?<=_sendMessage:function\([^)]+\)){/,
-                replace: "{Vencord.Api.MessageEvents._handlePreSend(...arguments);"
+                replace: "{if(Vencord.Api.MessageEvents._handlePreSend(...arguments)){return;};"
             }, {
                 match: /(?<=\beditMessage:function\([^)]+\)){/,
                 replace: "{Vencord.Api.MessageEvents._handlePreEdit(...arguments);"

src/plugins/nitroBypass.ts

@@ -16,18 +16,50 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { addPreEditListener, addPreSendListener, removePreEditListener,removePreSendListener } from "../api/MessageEvents";
+import { addPreEditListener, addPreSendListener, removePreEditListener, removePreSendListener } from "../api/MessageEvents";
+import { lazyWebpack } from "../utils";
 import { Devs } from "../utils/constants";
+import { ApngDisposeOp, getGifEncoder, importApngJs } from "../utils/dependencies";
 import definePlugin, { OptionType } from "../utils/types";
 import { Settings } from "../Vencord";
-import { findByProps } from "../webpack";
-import { UserStore } from "../webpack/common";
+import { filters } from "../webpack";
+import { ChannelStore, UserStore } from "../webpack/common";
+
+const DRAFT_TYPE = 0;
+const promptToUpload = lazyWebpack(filters.byCode("UPLOAD_FILE_LIMIT_ERROR"));
+
+interface Sticker {
+    available: boolean;
+    description: string;
+    format_type: number;
+    guild_id: string;
+    id: string;
+    name: string;
+    tags: string;
+    type: number;
+    _notAvailable?: boolean;
+}
+
+interface StickerPack {
+    id: string;
+    name: string;
+    sku_id: string;
+    description: string;
+    cover_sticker_id: string;
+    banner_asset_id: string;
+    stickers: Sticker[];
+}
 
 export default definePlugin({
     name: "NitroBypass",
-    authors: [Devs.Arjix],
-    description: "Allows you to stream in nitro quality and send fake emojis.",
+    authors: [
+        Devs.Arjix,
+        Devs.D3SOX,
+        Devs.Ven
+    ],
+    description: "Allows you to stream in nitro quality and send fake emojis/stickers.",
     dependencies: ["MessageEventsAPI"],
+
     patches: [
         {
             find: "canUseAnimatedEmojis:function",
@@ -38,10 +70,25 @@ export default definePlugin({
             ].map(func => {
                 return {
                     match: new RegExp(`${func}:function\\(.+?}`),
-                    replace: `${func}:function (e) { return true; }`
+                    replace: `${func}:function(e){return true;}`
                 };
             })
         },
+        {
+            find: "canUseAnimatedEmojis:function",
+            predicate: () => Settings.plugins.NitroBypass.enableStickerBypass === true,
+            replacement: {
+                match: /canUseStickersEverywhere:function\(.+?}/,
+                replace: "canUseStickersEverywhere:function(e){return true;}"
+            },
+        },
+        {
+            find: "\"SENDABLE\"",
+            replacement: {
+                match: /(\w+)\.available\?/,
+                replace: "true?"
+            }
+        },
         {
             find: "canUseAnimatedEmojis:function",
             predicate: () => Settings.plugins.NitroBypass.enableStreamQualityBypass === true,
@@ -52,7 +99,7 @@ export default definePlugin({
             ].map(func => {
                 return {
                     match: new RegExp(`${func}:function\\(.+?}`),
-                    replace: `${func}:function (e) { return true; }`
+                    replace: `${func}:function(e){return true;}`
                 };
             })
         },
@@ -63,8 +110,9 @@ export default definePlugin({
                 match: /(userPremiumType|guildPremiumTier):.{0,10}TIER_\d,?/g,
                 replace: ""
             }
-        }
+        },
     ],
+
     options: {
         enableEmojiBypass: {
             description: "Allow sending fake emojis",
@@ -72,6 +120,18 @@ export default definePlugin({
             default: true,
             restartNeeded: true,
         },
+        enableStickerBypass: {
+            description: "Allow sending fake stickers",
+            type: OptionType.BOOLEAN,
+            default: true,
+            restartNeeded: true,
+        },
+        stickerSize: {
+            description: "Size of the stickers when sending",
+            type: OptionType.SLIDER,
+            default: 160,
+            markers: [32, 64, 128, 160, 256, 512],
+        },
         enableStreamQualityBypass: {
             description: "Allow streaming in nitro quality",
             type: OptionType.BOOLEAN,
@@ -88,50 +148,162 @@ export default definePlugin({
         return Boolean(UserStore.getCurrentUser().premiumType);
     },
 
-    start() {
-        if (!Settings.plugins.NitroBypass.enableEmojiBypass) {
-            return;
+    getStickerLink(stickerId: string) {
+        return `https://media.discordapp.net/stickers/${stickerId}.png?size=${Settings.plugins.NitroBypass.stickerSize}`;
+    },
+
+    async sendAnimatedSticker(stickerLink: string, stickerId: string, channelId: string) {
+        const [{ parseURL }, {
+            GIFEncoder,
+            quantize,
+            applyPalette
+        }] = await Promise.all([importApngJs(), getGifEncoder()]);
+
+        const { frames, width, height } = await parseURL(stickerLink);
+
+        const gif = new GIFEncoder();
+        const resolution = Settings.plugins.NitroBypass.stickerSize;
+
+        const canvas = document.createElement("canvas");
+        canvas.width = width;
+        canvas.height = height;
+
+        const ctx = canvas.getContext("2d", {
+            willReadFrequently: true
+        })!;
+
+        const scale = resolution / width;
+        ctx.scale(scale, scale);
+
+        let lastImg: HTMLImageElement | null = null;
+        for (const { left, top, width, height, disposeOp, img, delay } of frames) {
+            if (disposeOp === ApngDisposeOp.BACKGROUND) {
+                ctx.clearRect(left, top, width, height);
+            }
+            ctx.drawImage(img, left, top, width, height);
+
+            const { data } = ctx.getImageData(0, 0, resolution, resolution);
+
+            const palette = quantize(data, 256);
+            const index = applyPalette(data, palette);
+
+            gif.writeFrame(index, resolution, resolution, {
+                transparent: true,
+                palette,
+                delay,
+            });
+
+            if (disposeOp === ApngDisposeOp.PREVIOUS && lastImg) {
+                ctx.drawImage(lastImg, left, top, width, height);
+            }
+            lastImg = img;
         }
 
-        if (this.canUseEmotes) {
-            console.info("[NitroBypass] Skipping start because you have nitro");
+        gif.finish();
+        const file = new File([gif.bytesView()], `${stickerId}.gif`, { type: "image/gif" });
+        promptToUpload([file], ChannelStore.getChannel(channelId), DRAFT_TYPE);
+    },
+
+    start() {
+        const settings = Settings.plugins.NitroBypass;
+        if (!settings.enableEmojiBypass && !settings.enableStickerBypass) {
             return;
         }
 
-        const { getCustomEmojiById } = findByProps("getCustomEmojiById");
+        const EmojiStore = lazyWebpack(filters.byProps("getCustomEmojiById"));
+        const StickerStore = lazyWebpack(filters.byProps("getAllGuildStickers")) as {
+            getPremiumPacks(): StickerPack[];
+            getAllGuildStickers(): Map<string, Sticker[]>;
+            getStickerById(id: string): Sticker | undefined;
+        };
 
-        function getWordBoundary(origStr, offset) {
+        function getWordBoundary(origStr: string, offset: number) {
             return (!origStr[offset] || /\s/.test(origStr[offset])) ? "" : " ";
         }
 
-        this.preSend = addPreSendListener((_, messageObj) => {
+        this.preSend = addPreSendListener((channelId, messageObj, extra) => {
             const { guildId } = this;
-            for (const emoji of messageObj.validNonShortcutEmojis) {
-                if (!emoji.require_colons) continue;
-                if (emoji.guildId === guildId && !emoji.animated) continue;
-
-                const emojiString = `<${emoji.animated ? "a" : ""}:${emoji.originalName || emoji.name}:${emoji.id}>`;
-                const url = emoji.url.replace(/\?size=[0-9]+/, "?size=48");
-                messageObj.content = messageObj.content.replace(emojiString, (match, offset, origStr) => {
-                    return `${getWordBoundary(origStr, offset - 1)}${url}${getWordBoundary(origStr, offset + match.length)}`;
-                });
-            }
-        });
 
-        this.preEdit = addPreEditListener((_, __, messageObj) => {
-            const { guildId } = this;
+            if (settings.enableStickerBypass) {
+                const stickerId = extra?.stickerIds?.[0];
+
+                if (stickerId) {
+                    let stickerLink = this.getStickerLink(stickerId);
+                    let sticker: Sticker | undefined;
+
+                    const discordStickerPack = StickerStore.getPremiumPacks().find(pack => {
+                        const discordSticker = pack.stickers.find(sticker => sticker.id === stickerId);
+                        if (discordSticker) {
+                            sticker = discordSticker;
+                        }
+                        return discordSticker;
+                    });
+
+                    if (discordStickerPack) {
+                        // discord stickers provided by the Distok project
+                        stickerLink = `https://distok.top/stickers/${discordStickerPack.id}/${stickerId}.gif`;
+                    } else {
+                        // guild stickers
+                        sticker = StickerStore.getStickerById(stickerId);
+                    }
+
+                    if (sticker) {
+                        // when the user has Nitro and the sticker is available, send the sticker normally
+                        if (this.canUseEmotes && sticker.available) {
+                            return { cancel: false };
+                        }
+
+                        // only modify if sticker is not from current guild
+                        if (sticker.guild_id !== guildId) {
+                            // if it's an animated guild sticker, download it, convert to gif and send it
+                            const isAnimated = sticker.format_type === 2;
+                            if (!discordStickerPack && isAnimated) {
+                                this.sendAnimatedSticker(stickerLink, stickerId, channelId);
+                                return { cancel: true };
+                            }
+
+                            if (messageObj.content)
+                                messageObj.content += " ";
+                            messageObj.content += stickerLink;
 
-            for (const [emojiStr, _, emojiId] of messageObj.content.matchAll(/(?<!\\)<a?:(\w+):(\d+)>/ig)) {
-                const emoji = getCustomEmojiById(emojiId);
-                if (emoji == null || (emoji.guildId === guildId && !emoji.animated)) continue;
-                if (!emoji.require_colons) continue;
+                            delete extra.stickerIds;
+                        }
+                    }
+                }
+            }
+
+            if (!this.canUseEmotes && settings.enableEmojiBypass) {
+                for (const emoji of messageObj.validNonShortcutEmojis) {
+                    if (!emoji.require_colons) continue;
+                    if (emoji.guildId === guildId && !emoji.animated) continue;
 
-                const url = emoji.url.replace(/\?size=[0-9]+/, "?size=48");
-                messageObj.content = messageObj.content.replace(emojiStr, (match, offset, origStr) => {
-                    return `${getWordBoundary(origStr, offset - 1)}${url}${getWordBoundary(origStr, offset + match.length)}`;
-                });
+                    const emojiString = `<${emoji.animated ? "a" : ""}:${emoji.originalName || emoji.name}:${emoji.id}>`;
+                    const url = emoji.url.replace(/\?size=\d+/, "?size=48");
+                    messageObj.content = messageObj.content.replace(emojiString, (match, offset, origStr) => {
+                        return `${getWordBoundary(origStr, offset - 1)}${url}${getWordBoundary(origStr, offset + match.length)}`;
+                    });
+                }
             }
+
+            return { cancel: false };
         });
+
+        if (!this.canUseEmotes && settings.enableEmojiBypass) {
+            this.preEdit = addPreEditListener((_, __, messageObj) => {
+                const { guildId } = this;
+
+                for (const [emojiStr, _, emojiId] of messageObj.content.matchAll(/(?<!\\)<a?:(\w+):(\d+)>/ig)) {
+                    const emoji = EmojiStore.getCustomEmojiById(emojiId);
+                    if (emoji == null || (emoji.guildId === guildId && !emoji.animated)) continue;
+                    if (!emoji.require_colons) continue;
+
+                    const url = emoji.url.replace(/\?size=\d+/, "?size=48");
+                    messageObj.content = messageObj.content.replace(emojiStr, (match, offset, origStr) => {
+                        return `${getWordBoundary(origStr, offset - 1)}${url}${getWordBoundary(origStr, offset + match.length)}`;
+                    });
+                }
+            });
+        }
     },
 
     stop() {

src/plugins/petpet.ts

@@ -17,8 +17,9 @@
 */
 
 import { ApplicationCommandInputType, ApplicationCommandOptionType, Argument, CommandContext, findOption } from "../api/Commands";
+import { lazyWebpack, makeLazy } from "../utils";
 import { Devs } from "../utils/constants";
-import { lazyWebpack, makeLazy } from "../utils/misc";
+import { getGifEncoder } from "../utils/dependencies";
 import definePlugin from "../utils/types";
 import { filters } from "../webpack";
 
@@ -27,11 +28,6 @@ const DEFAULT_DELAY = 20;
 const DEFAULT_RESOLUTION = 128;
 const FRAMES = 10;
 
-// https://github.com/mattdesl/gifenc
-// this lib is way better than gif.js and all other libs, they're all so terrible but this one is nice
-// @ts-ignore ts mad
-const getGifEncoder = makeLazy(() => import("https://unpkg.com/gifenc@1.0.3/dist/gifenc.esm.js"));
-
 const getFrames = makeLazy(() => Promise.all(
     Array.from(
         { length: FRAMES },

src/utils/dependencies.ts

@@ -0,0 +1,76 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2022 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { makeLazy } from "./misc";
+
+/*
+    Add dynamically loaded dependencies for plugins here.
+ */
+
+// https://github.com/mattdesl/gifenc
+// this lib is way better than gif.js and all other libs, they're all so terrible but this one is nice
+// @ts-ignore ts mad
+export const getGifEncoder = makeLazy(() => import("https://unpkg.com/gifenc@1.0.3/dist/gifenc.esm.js"));
+
+// needed to parse APNGs in the nitroBypass plugin
+export const importApngJs = makeLazy(async () => {
+    const exports = {};
+    const winProxy = new Proxy(window, { set: (_, k, v) => exports[k] = v });
+    Function("self", await fetch("https://cdnjs.cloudflare.com/ajax/libs/apng-canvas/2.1.1/apng-canvas.min.js").then(r => r.text()))(winProxy);
+    // @ts-ignore
+    return exports.APNG as { parseURL(url: string): Promise<ApngFrameData>; };
+});
+
+// https://wiki.mozilla.org/APNG_Specification#.60fcTL.60:_The_Frame_Control_Chunk
+export enum ApngDisposeOp {
+    /**
+     * no disposal is done on this frame before rendering the next; the contents of the output buffer are left as is.
+     */
+    NONE,
+    /**
+     * the frame's region of the output buffer is to be cleared to fully transparent black before rendering the next frame.
+     */
+    BACKGROUND,
+    /**
+     * the frame's region of the output buffer is to be reverted to the previous contents before rendering the next frame.
+     */
+    PREVIOUS
+}
+
+// TODO: Might need to somehow implement this
+export enum ApngBlendOp {
+    SOURCE,
+    OVER
+}
+export interface ApngFrame {
+    left: number;
+    top: number;
+    width: number;
+    height: number;
+    img: HTMLImageElement;
+    delay: number;
+    blendOp: ApngBlendOp;
+    disposeOp: ApngDisposeOp;
+}
+
+export interface ApngFrameData {
+    width: number;
+    height: number;
+    frames: ApngFrame[];
+    playTime: number;
+}