$ npm install @line/bot-sdk discord.js express axios

constexpress=require('express');constaxios=require('axios');constline=require('@line/bot-sdk');constPORT=process.env.PORT||5000;constlineConfig={channelAccessToken:process.env.LINE_CHANNEL_ACCESS_TOKEN,channelSecret:process.env.LINE_CHANNEL_SECRET,};constlineClient=newline.Client(lineConfig);constdiscordWebhookUrl=process.env.DISCORD_WEBHOOK_URL;constdiscordWebhookConfig={headers:{'Accept':'application/json','Content-type':'application/json',},};constgeneratePostData=(event,profile)=>{consttype=event.message.type;if(type!=='text'){return{username:profile.displayName,avatar_url:`${profile.pictureUrl}.png`,content:'テキスト以外のメッセージを送信しました。',};}return{username:profile.displayName,avatar_url:`${profile.pictureUrl}.png`,content:event.message.text,};};constlineBot=async(req,res)=>{res.status(200).end();// 'status 200'をLINEのAPIに送信constevents=req.body.events;events.forEach(async(event)=>{try{constprofile=awaitlineClient.getProfile(event.source.userId);constpostData=awaitgeneratePostData(event,profile);// DiscordのWebHookにPOSTawaitaxios.post(discordWebhookUrl,postData,discordWebhookConfig);}catch(error){console.error(error);}});};constapp=express();app.post('/linehook/',line.middleware(lineConfig),(req,res)=>lineBot(req,res));app.listen(PORT,()=>console.log(`Listening on ${PORT} for LINE Messaging API.`));

constline=require('@line/bot-sdk');constdiscord=require('discord.js');constlineConfig={channelAccessToken:process.env.LINE_CHANNEL_ACCESS_TOKEN,channelSecret:process.env.LINE_CHANNEL_SECRET,};constlineClient=newline.Client(lineConfig);constdiscordClient=newdiscord.Client();constgenerateMessage=(event)=>{constcontent=event.content;if(content.length===0){return{type:'text',text:'Discordで非対応の形式のメッセージを送信しました。',sender:{name:event.author.username,iconUrl:event.author.displayAvatarURL().replace('.webp','.png'),},};}return{type:'text',text:`${content}`,sender:{name:event.author.username,iconUrl:event.author.displayAvatarURL().replace('.webp','.png'),},};};discordClient.on('message',async(event)=>{try{// BOTのメッセージはスルーif(!event.author.bot){constmessage=generateMessage(event);awaitlineClient.pushMessage(// 送信先のトークルームのグループ/ユーザーIDprocess.env.LINE_TARGET_ID,message,);}}catch(error){console.error(error);}});discordClient.login(process.env.DISCORD_ACCESS_TOKEN);

line: node linebot.js
dicord: node discordbot.js