Implement bitcoin donations via BTCPay

app/jobs/btcpay_check_donation_job.rb

@@ -0,0 +1,24 @@
+class BtcpayCheckDonationJob < ApplicationJob
+  queue_as :default
+
+  def perform(donation)
+    return if donation.completed?
+
+    invoice = BtcpayManager::FetchInvoice.call(invoice_id: donation.btcpay_invoice_id)
+
+    case invoice["status"]
+    when "Settled"
+      # TODO use time from actual payment confirmation
+      donation.paid_at = DateTime.now
+      donation.payment_status = "settled"
+      donation.save!
+      # TODO send email
+    when "Processing"
+      re_enqueue_job(donation)
+    end
+  end
+
+  def re_enqueue_job(donation)
+    self.class.set(wait: 20.seconds).perform_later(donation)
+  end
+end