Add support and migration for lndhub.go

Slightly WIP

app/services/lndhub.rb

@@ -2,7 +2,7 @@ class Lndhub
   attr_accessor :auth_token
 
   def initialize
-    @base_url = ENV["LNDHUB_API_URL"]
+    @base_url = ENV["LNDHUB_LEGACY_API_URL"]
   end
 
   def post(endpoint, payload)
@@ -42,15 +42,15 @@ class Lndhub
     self.auth_token
   end
 
-  def balance(user_token)
+  def balance(user_token=nil)
     get "balance", user_token || auth_token
   end
 
-  def gettxs(user_token)
+  def gettxs(user_token=nil)
     get "gettxs", user_token || auth_token
   end
 
-  def getuserinvoices(user_token)
+  def getuserinvoices(user_token=nil)
     get "getuserinvoices", user_token || auth_token
   end
 

app/services/lndhub_v2.rb

@@ -0,0 +1,81 @@
+class LndhubV2
+  attr_accessor :auth_token
+
+  def initialize
+    @base_url = ENV["LNDHUB_API_URL"]
+  end
+
+  def post(endpoint, payload, options={})
+    headers = { "Content-Type" => "application/json" }
+    if auth_token
+      headers.merge!({ "Authorization" => "Bearer #{auth_token}" })
+    elsif options[:admin_token]
+      headers.merge!({ "Authorization" => "Bearer #{options[:admin_token]}" })
+    end
+
+    res = Faraday.post "#{@base_url}/#{endpoint}", payload.to_json, headers
+
+    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_login, 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
+
+  def create_invoice(payload)
+    # Payload: { amount: 1000, description: "", description_hash: "" }
+    post "v2/invoices", payload
+  end
+end