- **protocol/socketapi/challenge.go**:
- Removed unused `GetListener` function and its associated logic.
- **protocol/socketapi/handleEvent.go**:
- Refactored `env.Id` references to `env.E.Id` to standardize access to event identifiers.
- **app/realy/server-impl.go**:
- Added `AuthRequired` method to expose server-level authentication configuration.
- **app/realy/handleRelayinfo.go**:
- Included `Authentication` in supported protocols.
- Updated relay information to expose `AuthRequired` status in `Limitation`.
- **encoders/envelopes/authenvelope/authenvelope.go**:
- Introduced `Id` method for `Response` type.
- **app/realy/server-publish.go**:
- Refined event saving logic by replacing `chk.E` with a direct `err` check.
- **app/realy/server.go**:
- Added `authRequired` field in `Server` struct and integrated it into relevant methods.
- **protocol/socketapi/socketapi.go**:
- Introduced authentication handling in WebSocket listeners if `AuthRequired` is enabled.
- **protocol/socketapi/handleAuth.go**:
- Implemented authentication response validation against challenges and server URLs.
- Supported logging of successes and failures.
- **app/config/config.go**:
- Added `AuthRequired` flag to configuration structure and environment variables.
- **encoders/envelopes/eventenvelope/eventenvelope.go**:
- Added `Id` method for `Submission` and `Result` types.
- **interfaces/server/server.go**:
- Added `AuthRequired` and `ServiceURL` methods to the interface.
- **protocol/ws/listener.go**:
- Added `authRequested` field and methods to track authentication requests.
- **protocol/socketapi/ok.go**:
- Introduced `Ok` utility functions for standard responses indicating reasons and types of errors.
- **app/realy/auth.go**:
- Added `ServiceURL` method to determine the relay's URL for authentication responses.
- **encoders/reason/reason.go**:
- Defined reusable reason templates for responses such as `auth-required` and `error`.
- **protocol/socketapi/ws.go**:
- Adjusted `NewListener` to handle `authRequired` flag and conditionally generate challenges.