Rename Wallet to Lightning Network, move to Services

app/controllers/services/lightning_controller.rb

@@ -0,0 +1,91 @@
+require "rqrcode"
+
+class Services::LightningController < ApplicationController
+  before_action :require_user_signed_in
+  before_action :authenticate_with_lndhub
+  before_action :set_current_section
+  before_action :fetch_balance
+
+  def index
+    @wallet_url = "lndhub://#{current_user.ln_account}:#{current_user.ln_password}@#{ENV['LNDHUB_PUBLIC_URL']}"
+
+    qrcode = RQRCode::QRCode.new(@wallet_url)
+    @svg = qrcode.as_svg(
+      color: "000",
+      shape_rendering: "crispEdges",
+      module_size: 6,
+      standalone: true,
+      use_path: true,
+      svg_attributes: {
+        class: 'inline-block'
+      }
+    )
+  end
+
+  def transactions
+    @transactions = fetch_transactions
+  end
+
+  private
+
+  def authenticate_with_lndhub(options={})
+    if session[:ln_auth_token].present? && !options[:force_reauth]
+      @ln_auth_token = session[:ln_auth_token]
+    else
+      lndhub = Lndhub.new
+      auth_token = lndhub.authenticate(current_user)
+      session[:ln_auth_token] = auth_token
+      @ln_auth_token = auth_token
+    end
+  rescue
+    # TODO add exception tracking
+  end
+
+  def set_current_section
+    @current_section = :services
+  end
+
+  def fetch_balance
+    lndhub = Lndhub.new
+    data = lndhub.balance @ln_auth_token
+    @balance = data["BTC"]["AvailableBalance"] rescue nil
+  rescue
+    authenticate_with_lndhub(force_reauth: true)
+    return nil if @fetch_balance_retried
+    @fetch_balance_retried = true
+    fetch_balance
+  end
+
+  def fetch_transactions
+    lndhub = Lndhub.new
+    txs = lndhub.gettxs @ln_auth_token
+    invoices = lndhub.getuserinvoices(@ln_auth_token).select{|i| i["ispaid"]}
+    process_transactions(txs + invoices)
+  rescue
+    authenticate_with_lndhub(force_reauth: true)
+    return [] if @fetch_transactions_retried
+    @fetch_transactions_retried = true
+    fetch_transactions
+  end
+
+  def process_transactions(txs)
+    txs.collect do |tx|
+      if tx["type"] == "bitcoind_tx"
+        tx["amount_sats"] = (tx["amount"] * 100000000).to_i
+        tx["datetime"] = Time.at(tx["time"].to_i)
+        tx["title"] = "Received"
+        tx["description"] = "On-chain topup"
+        tx["received"] = true
+      else
+        tx["amount_sats"] = tx["value"] || tx["amt"]
+        tx["fee"] = tx["type"] == "paid_invoice" ? tx["fee"] : nil
+        tx["datetime"] = Time.at(tx["timestamp"].to_i)
+        tx["title"] = tx["type"] == "paid_invoice" ? "Sent" : "Received"
+        tx["description"] = tx["memo"] || tx["description"]
+        tx["received"] = tx["type"] == "user_invoice"
+      end
+    end
+
+    txs.sort{ |a,b| b["datetime"] <=> a["datetime"] }
+  end
+end