only tested on firefox (which has additional security for content scripts and thus user scripts)
to build, do yarn install, then do yarn rollup -c
remove the "(function () {" from the start of twitch.js and "})();" from the end, then prepend the following:
// ==UserScript==
// @name Quick Redeem Rewards
// @version 1
// @match https://www.twitch.tv/*/
// @match https://www.twitch.tv/*
// @grant none
// ==/UserScript==
to use, call "window.redeemRewardNTimes" from your browser console with the channel name as the first parameter, the name of the reward as the second parameter, and number of redeems as the third parameter
abusing this is a great way to get banned from twitch, by the way - it's plainly obvious from timing it's done by a script