Add support and migration for lndhub.go

Slightly WIP

.env.production

@@ -1,4 +1,7 @@
 EJABBERD_API_URL='https://xmpp.kosmos.org:5443/api'
+
 BTCPAY_API_URL='http://10.1.1.163:23001/api/v1'
-LNDHUB_API_URL='http://10.1.1.163:3023'
+
+LNDHUB_LEGACY_API_URL='http://10.1.1.163:3023'
+LNDHUB_API_URL='http://10.1.1.163:3026'
 LNDHUB_PUBLIC_URL='https://lndhub.kosmos.org'

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

config/credentials.yml.enc

@@ -1 +1 @@
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--Lij/n0+cpstyZD28--FOUhwW3y+0jdaYkKvG2xrg==

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