Merge pull request 'Report Lndhub API errors to Sentry' (#133) from refactor/lndhub_integration into master

Reviewed-on: #133

app/controllers/services/lightning_controller.rb

@@ -37,8 +37,8 @@ class Services::LightningController < ApplicationController
       session[:ln_auth_token] = auth_token
       @ln_auth_token = auth_token
     end
-  rescue
+  rescue => e
-    # TODO add exception tracking
+    Sentry.capture_exception(e) if Setting.sentry_enabled?
   end
 
   def set_current_section
@@ -49,9 +49,9 @@ class Services::LightningController < ApplicationController
     lndhub = Lndhub.new
     data = lndhub.balance @ln_auth_token
     @balance = data["BTC"]["AvailableBalance"] rescue nil
-  rescue
+  rescue AuthError
     authenticate_with_lndhub(force_reauth: true)
-    return nil if @fetch_balance_retried
+    raise if @fetch_balance_retried
     @fetch_balance_retried = true
     fetch_balance
   end
@@ -61,9 +61,9 @@ class Services::LightningController < ApplicationController
     txs = lndhub.gettxs @ln_auth_token
     invoices = lndhub.getuserinvoices(@ln_auth_token).select{|i| i["ispaid"]}
     process_transactions(txs + invoices)
-  rescue
+  rescue AuthError
     authenticate_with_lndhub(force_reauth: true)
-    return [] if @fetch_transactions_retried
+    raise if @fetch_transactions_retried
     @fetch_transactions_retried = true
     fetch_transactions
   end

app/errors/auth_error.rb

@@ -0,0 +1 @@
+class AuthError < StandardError; end

app/services/lndhub.rb

@@ -12,12 +12,7 @@ class Lndhub
     end
 
     res = Faraday.post "#{@base_url}/#{endpoint}", payload.to_json, headers
-
+    log_error(res) if res.status != 200
-    if res.status != 200
-      Rails.logger.error "[lndhub] API request failed:"
-      Rails.logger.error res.body
-      #TODO add some kind of exception tracking/notifications
-    end
 
     JSON.parse(res.body)
   end
@@ -31,7 +26,7 @@ class Lndhub
     data = JSON.parse(res.body)
 
     if data.is_a?(Hash) && data["error"] && data["message"] == "bad auth"
-      raise "BAD_AUTH"
+      raise AuthError
     else
       data
     end
@@ -68,4 +63,13 @@ class Lndhub
 
     invoice["payment_request"]
   end
+
+  def log_error(res)
+    Rails.logger.error "[lndhub] API request failed:"
+    Rails.logger.error res.body
+
+    if Setting.sentry_enabled?
+      Sentry.capture_message("Lndhub API request failed: #{res.body}")
+    end
+  end
 end

app/services/lndhub_v2.rb

@@ -1,9 +1,4 @@
-class LndhubV2
+class LndhubV2 < Lndhub
-  attr_accessor :auth_token
-
-  def initialize
-    @base_url = ENV["LNDHUB_API_URL"]
-  end
 
   def post(endpoint, payload, options={})
     headers = { "Content-Type" => "application/json" }
@@ -12,64 +7,12 @@ class LndhubV2
     elsif options[:admin_token]
       headers.merge!({ "Authorization" => "Bearer #{options[:admin_token]}" })
     end
-
     res = Faraday.post "#{@base_url}/#{endpoint}", payload.to_json, headers
-
+    log_error(res) if res.status != 200
-    if res.status != 200
-      Rails.logger.error "[lndhub] API request failed:"
-      Rails.logger.error res.body
-      #TODO add some kind of exception tracking/notifications
-    end
 
     JSON.parse(res.body)
   end
 
-  def get(endpoint, auth_token)
-    res = Faraday.get("#{@base_url}/#{endpoint}", {}, {
-      "Content-Type" => "application/json",
-      "Accept" => "application/json",
-      "Authorization" => "Bearer #{auth_token}"
-    })
-
-    JSON.parse(res.body)
-  end
-
-  def create(payload)
-    post "create", payload
-  end
-
-  def authenticate(user)
-    credentials = post "auth?type=auth", { login: user.ln_account, password: user.ln_password }
-    self.auth_token = credentials["access_token"]
-    self.auth_token
-  end
-
-  def balance(user_token=nil)
-    get "balance", user_token || auth_token
-  end
-
-  def gettxs(user_token)
-    get "gettxs", user_token || auth_token
-  end
-
-  def getuserinvoices(user_token)
-    get "getuserinvoices", user_token || auth_token
-  end
-
-  def addinvoice(payload)
-    invoice = post "addinvoice", {
-      amt: payload[:amount],
-      memo: payload[:memo],
-      description_hash: payload[:description_hash]
-    }
-
-    invoice["payment_request"]
-  end
-
-  #
-  # V2
-  #
-
   def create_account(payload={})
     post "v2/users", payload, admin_token: Rails.application.credentials.lndhub[:admin_token]
   end
@@ -78,4 +21,5 @@ class LndhubV2
     # Payload: { amount: 1000, description: "", description_hash: "" }
     post "v2/invoices", payload
   end
+
 end