app/views/spree/admin/payments/source_views/_mollie.html.erb
<fieldset >
<legend align="center"><%= Spree.t(:transaction, :scope => :mollie) %></legend>
<div style="margin-bottom: 20px;">
<div>
<%= Spree.t(:transaction_id) %> : <%= payment.transaction_id %>
</div>
<div>
<%= Spree.t(:payment_state, :scope => :mollie) %> : <%= payment.state %>
</div>
<% if payment.refunds.empty? %>
<% if payment.state == 'completed' %>
<%= button_link_to Spree.t('actions.refund', scope: :mollie), spree.mollie_refund_admin_order_payment_path(@order, payment), icon: 'money' %>
<% end %>
<% else %>
<div>
<%= Spree.t(:refunded_at, :scope => :mollie) %> : <%= pretty_time(payment.refunds.last.created_at) %>
</div>
<% end %>
</div>
</fieldset>