Add support and migration for lndhub.go

Slightly WIP

lib/tasks/lndhub.rake

@@ -21,4 +21,31 @@ namespace :lndhub do
     end
     puts "--\nSum of user balances: #{sum} sats"
   end
+
+  desc "Migrate existing accounts to lndhub.go"
+  task :migrate => :environment do |t, args|
+    # user = User.find_by cn: "jimmy"
+    User.all.each do |user|
+      puts "Migrating #{user.cn}"
+      puts "Creating account..."
+      lndhub_v2 = LndhubV2.new
+      res = lndhub_v2.create_account login: user.ln_login, password: user.ln_password
+      puts res.inspect
+
+      lndhub = Lndhub.new
+      lndhub.authenticate(user)
+      data = lndhub.balance
+      balance = data["BTC"]["AvailableBalance"] rescue 0
+
+      if balance > 0
+        lndhub_v2.authenticate(user)
+        desc = "Balance migration from old Kosmos Lightning back-end"
+        res = lndhub_v2.create_invoice amount: balance, description: desc
+        puts "Payment request for #{user.cn} (#{balance} sats):"
+        puts res["payment_request"]
+      end
+
+      puts "---"
+    end
+  end
 end