ruby script that deletes all messages from a defined channel

clear_channel.rb

require 'slack'
require 'json'

Slack.configure do |config|
  config.token = ENV['SLACK_TOKEN']
end

Slack.auth_test

general = "C06S8GRSL"

channel_history = Slack.channels_history(channel: general, count: 1000)["messages"]

channel_history.each do |message|
  response = Slack.chat_delete(ts: message["ts"], channel: general)
  puts "Deleted Message : #{response["ts"]}"
end