Refactor BTCPay service and API, add lightning balance

app/controllers/api/btcpay_controller.rb

@@ -0,0 +1,21 @@
+class Api::BtcpayController < Api::BaseController
+
+  def onchain_btc_balance
+    balance = BtcpayManager::FetchOnchainWalletBalance.call
+    render json: balance
+  rescue => error
+    Rails.logger.warn "Failed to fetch BTC wallet balance: #{error.message}"
+    render json: { error: 'Failed to fetch wallet balance' },
+           status: 500
+  end
+
+  def lightning_btc_balance
+    balance = BtcpayManager::FetchLightningWalletBalance.call
+    render json: balance
+  rescue => error
+    Rails.logger.warn "Failed to fetch BTC lightning balance: #{error.message}"
+    render json: { error: 'Failed to fetch wallet balance' },
+           status: 500
+  end
+
+end

app/controllers/api/kredits_controller.rb

@@ -1,13 +0,0 @@
-class Api::KreditsController < Api::BaseController
-
-  def onchain_btc_balance
-    btcpay = BtcPay.new
-    balance = btcpay.onchain_wallet_balance
-    render json: balance
-  rescue => error
-    Rails.logger.warn "Failed to fetch kredits BTC wallet balance: #{error.message}"
-    render json: { error: 'Failed to fetch wallet balance' },
-           status: 500
-  end
-
-end