# Configuration - UI

<p>Configuration properties from .env file used by Origin UI</p>

| Property                     | Example value                        | Additional description                                                                                     |
| ---------------------------- | ------------------------------------ | ---------------------------------------------------------------------------------------------------------- |
| MODE                         | dev                                  |
| BACKEND_URL                  | http://localhost                     |
| BACKEND_PORT                 | 3030                                 |
| UI_BASE_URL                  | http://localhost:3000                |
| WEB3                         | http://localhost:8545                |
| BLOCKCHAIN_EXPLORER_URL      | https://volta-explorer.energyweb.org | URL of service allowing to examine blockchain transactions from the platform                               |
| REGISTRATION_MESSAGE_TO_SIGN | I register as Origin user            | Registration message used by Metamask                                                                      |
| EXCHANGE_WALLET_PUB          | Public key of wallet                 | Public key for platform's exchange wallet                                                                  |
| DISABLED_UI_FEATURES         | DevicesImport;IRecUIApp              | All available feature flags are listed in `@energyweb/utils-general` package as `OriginFeature` enum.      |
| DEVICE_PROPERTIES_ENABLED    | GRID_OPERATOR,LOCATION               | Parts of device data that are used for creating and filtering devices. Used by `DeviceSelectors` component |
| ISSUER_ID                    | Issuer ID                            | Identifier for Issuer-specific devices                                                                     |
| SMART_METER_ID               | Smart Meter Readings API ID          | Identifier for smart meter connected to device                                                             |
| MARKET_UTC_OFFSET            | 420                                  | UTC offset for keeping precise time of trade in market timezone                                            |
| DEFAULT_ENERGY_IN_BASE_UNIT  | 1                                    | Default amount of energy in platform's energy unit                                                         |
| GOOGLE_MAPS_API_KEY          | API_KEY                              | Used for displaying device location on map                                                                 |