Retry failed Stripe Webhook events

retry_stripe_webhook.rb

# frozen_string_literal: true

# Stripe will retry failed webhooks seven times with exponential backoff. If that has been exceeded
# then the webhook event is marked "failed" and won't be retried. We can resend the event by [retrieving
# the event data and posting it to the 
# webhook](https://groups.google.com/a/lists.stripe.com/forum/#!topic/api-discuss/N33ZXqp3NzI).
#
# To use this, configure your endpoint URL below, then run this in providing event IDs on the command line.

WEB_HOOK = "YOUR ENDPOINT HERE"
SECRET   = StripeEvent.signing_secrets.first   # Hard-code this if you don't have the secret in this environment

event_ids = ARGV  # Or hard-code a list of event IDs

def sign_event(data)
  time = Time.now.to_i
  payload = "#{time}.#{data}"
  signature = Stripe::Webhook::Signature.send(:compute_signature, payload, SECRET)
  "t=#{time},v1=#{signature},v0=thisdoesntmatter"
end

event_ids.each do |event_id|
  event_data = Stripe::Event.retrieve(event_id).to_json
  response = Excon.post(
      WEB_HOOK,
      headers: {
          "Content-Type"     => "application/json; charset=utf8",
          "Cache-Control"    => "no-cache",
          "User-Agent"       => "Stripe/1.0 (+https://stripe.com/docs/webhooks)",
          "Stripe-Signature" => sign_event(event_data)
      },
      body:    event_data
  )
  puts "#{event_id}: (#{response.status})\n#{response.body}"
end