Format and style user donations

spec/helpers/application_helper_spec.rb

@@ -0,0 +1,9 @@
+require 'rails_helper'
+
+describe ApplicationHelper do
+  describe "sats_to_btc" do
+    it "converts satoshis to BTC" do
+      expect(helper.sats_to_btc(120000000)).to eq(1.2)
+    end
+  end
+end