add bitget service

app/services/bitget_spots_service.rb

@@ -0,0 +1,70 @@
+require 'openssl'
+require 'rest-client'
+
+class BitgetSpotsService
+  BASE_URL = ENV['BITGET_API_URL']
+  attr_reader :user_id
+
+  def initialize(user_id: nil)
+    @user = User.find_by id: user_id
+
+    if @user.present?
+      @api_key = @user.bitget_api_key
+      @secret_key = Base64.decode64(@user.bitget_secret_key) rescue nil
+      @passphrase = Base64.decode64(@user.bitget_passphrase) rescue nil
+    else
+      @api_key = ENV["BITGET_KEY"]
+      @secret_key = ENV["BITGET_SECRET"]
+      @passphrase = ENV["BITGET_PASSPHRASE"]
+    end
+  end
+
+  def get_orders(start_time: nil, end_time: DateTime.now)
+    begin
+      start_time ||= end_time - 2.weeks
+      request_path = "/api/v2/tax/spot-record?endTime=#{end_time.strftime('%Q')}&startTime=#{start_time.strftime('%Q')}"
+      do_request("get", request_path)
+    rescue => e
+      format_error_msg(e)
+    end
+  end
+
+  def get_price(instId)
+    begin
+      request_path = "/api/v5/market/ticker?instId=#{instId}"
+      do_request("get", request_path)
+    rescue => e
+      format_error_msg(e)
+    end
+  end
+
+  private
+  def do_request(method, request_path)
+    url = BASE_URL + request_path
+    timestamp = '1685013478665' #get_timestamp
+    sign = signed_data("#{timestamp}#{method.upcase}#{request_path}")
+    headers = {
+      "ACCESS-KEY" => @api_key,
+      "ACCESS-SIGN" => sign,
+      "ACCESS-TIMESTAMP" => timestamp,
+      "ACCESS-PASSPHRASE" => @passphrase,
+      "Content-Type" => "application/json",
+      "locale" => "en-US"
+    }
+
+    response = RestClient.get(url, headers)
+    JSON.parse(response)
+  end
+
+  def signed_data(data)
+    Base64.strict_encode64(OpenSSL::HMAC.digest(OpenSSL::Digest.new('sha256'), @secret_key, data))
+  end
+
+  def get_timestamp
+    DateTime.now.strftime('%Q')
+  end
+
+  def format_error_msg(e)
+    "Error: #{e}"
+  end
+end