Really small and simple script for downloading sticker sets from telegram

tg-stickers-downloader.js

const axios = require('axios')
const fs = require('fs')
const path = require('path')

const token = 'YOUR_BOT_TOKEN'

// vvv UNCOMMENT TO USE PROXY vvv
// const SocksProxyAgent = require('socks-proxy-agent')
// const agent = new SocksProxyAgent('socks5://127.0.0.1:9150')
// axios.defaults.httpAgent = agent
// axios.defaults.httpsAgent = agent

const sid = process.argv[2]
let out = process.argv[3]
if (!sid) {
    console.log('usage: ' + process.argv[1] + ' <pack name> [output dir]')
    process.exit(0)
}

const endpoint = `https://api.telegram.org/bot${token}`
const fileendpoint = `https://api.telegram.org/file/bot${token}/`

const downloadFile = async (fileid, filename) => {
    const { data } = await axios.get(endpoint + '/getFile?file_id=' + fileid)
    const { data: stream } = await axios.get(fileendpoint + data.result.file_path, {
        responseType: 'stream'
    })
    const outs = fs.createWriteStream(path.join(out, filename))
    const proc = stream.pipe(outs)
    return new Promise((res, rej) => {
        proc.on('error', e => rej(e.stack || e))
        proc.on('finish', res)
    })
}

const main = async () => {
    console.log('[i] Retrieving sticker set')
    const { data } = await axios.get(endpoint + `/getStickerSet?name=` + sid)
    if (!data.ok) {
        console.error(data.error)
        return
    }

    if (!out) {
        out = `${data.result.title} (${data.result.name})`
    }

    try {
        fs.mkdirSync(out)
    } catch (e) {
        if (e.code !== 'EEXIST') {
            console.error('Failed to create output directory:\n' + e.stack || e)
        }
    }

    console.log('[i] Downloading ' + data.result.stickers.length + ' stickers..')

    const ext = data.result.is_animated ? 'json' : 'webp'
    const proms = data.result.stickers.map((ii, i) => downloadFile(ii.file_id, `${i}.${ext}`))
    await Promise.all(proms)
    console.log('[v] Finished!')
}

main().catch(console.error)