Twitch Javascript injected script to simulate reward redemption.

twitch_redeem_reward.js

// Twitch Javascript injected script to simulate reward redemption.
// Note: Class names may need to be changed if outdated.

// Index of reward to click.
var rewardButtonIndex = 0
var amountOfRedeems = 1

// Class names for elements.
var rewardsListButtonClass = "ScCoreButton-sc-ocjdkq-0 ScCoreButtonText-sc-ocjdkq-3 ljgEdo fuXDrj"
var specificRewardButtonClass = "ScInteractableBase-sc-ofisyf-0 ScInteractableDefault-sc-ofisyf-1 dsnvLR etibmD tw-interactable"
var redeemButtonClass = "ScCoreButton-sc-ocjdkq-0 ScCoreButtonPrimary-sc-ocjdkq-1 ljgEdo gmCwLG"

// Offset by the bit power-up redeems.
var rewardButtonOffset = 3

for (var i = 0; i < Math.max(amountOfRedeems, 1); i++) {
	// Wait for previous redeem to process.
	if (i > 0)
		await new Promise(resolve => setTimeout(resolve, 500))

	// Click rewards button.
	document.getElementsByClassName(rewardsListButtonClass)[0].click()

	// Wait for reward popup to show.
	await new Promise(resolve => setTimeout(resolve, 20))

	// Click reward button. 
	document.getElementsByClassName(specificRewardButtonClass)[rewardButtonIndex + rewardButtonOffset].click()

	// Wait for reward confirmation.
	await new Promise(resolve => setTimeout(resolve, 20))

	// Click redeem button.
	var buttons = document.getElementsByClassName(redeemButtonClass)
	buttons[buttons.length-1].click()
}