ltc payments

db/migrations/002_invoice_ltc.rb

@@ -0,0 +1,15 @@
+Sequel.migration do
+  change do
+    alter_table(:invoices) do
+      # LTC payout address captured at issue (defaults from LTC_ADDRESS env in the form).
+      # All three are nullable: LTC payment is opt-in per invoice.
+      add_column :ltc_address, String
+      # LTC price in the invoice currency at issue time (snapshot, like gel_rate).
+      # May be hand-entered or fetched from CoinGecko at form time.
+      add_column :ltc_rate,    BigDecimal, size: [18, 8]
+      # LTC amount due. Normally total / ltc_rate, but can be hand-overridden,
+      # so it is stored explicitly rather than recomputed.
+      add_column :ltc_amount,  BigDecimal, size: [18, 8]
+    end
+  end
+end