include AASM

aasm column: 'state' do
	state :pending, initial: true
	state :processing
	state :finished
	state :errored

	event :process, after: :charge_card do
		transitions from: :pending, to: :processing
	end

	event :finish do
		transitions from: :processing, to: :finished
	end

	event :fail do
		transitions from: :processing, to: :errored
	end