# abc-bench / task_cornflourblue_dotnet_6_jwt_refresh_tokens_api__users - taskset: [abc-bench](https://harnessreport.com/tasks/abc-bench.md) - difficulty: hard - category: Identity - language: - runnable from the site: no - agent timeout: 3600s ## Results by harness _none yet_ ## Instruction ``` You are a backend development expert. Please inspect the backend project located in the current directory, determine its programming language and architectural style, and then complete the following code implementation. Implement the user-domain service methods that back the Users API endpoints. Context - Work within `Services/UserService.cs`. The helper methods at the bottom of the class (`getUserByRefreshToken`, `rotateRefreshToken`, `removeOldRefreshTokens`, `revokeDescendantRefreshTokens`, `revokeRefreshToken`) are already implemented and must be used where appropriate. Required behavior 1. `Authenticate(AuthenticateRequest model, string ipAddress)` - Locate the user by `Username` from `_context.Users` and validate the supplied password with BCrypt. - On invalid credentials, throw `AppException` with the same message currently used elsewhere in the project. - On success, issue a JWT via `_jwtUtils.GenerateJwtToken(user)` and a new refresh token via `_jwtUtils.GenerateRefreshToken(ipAddress)`. - Attach the refresh token to the user, prune expired inactive tokens using `_appSettings.RefreshTokenTTL`, persist the user (`_context.Update` + `_context.SaveChanges`), and return an `AuthenticateResponse` that includes the new JWT and refresh token string. 2. `RefreshToken(string token, string ipAddress)` - Use `getUserByRefreshToken` to resolve the user and fetch the matching refresh token. - If the token is revoked, ensure all descendant tokens are revoked via `revokeDescendantRefreshTokens`, then persist the user before proceeding. - Reject inactive tokens with `AppException`. - Rotate the token by calling `rotateRefreshToken`, append the replacement token to the user’s list, remove expired inactive tokens, update the data store, and issue a fresh JWT. Return an `AuthenticateResponse` with the JWT and replacement refresh token value. 3. `RevokeToken(string token, string ipAddress)` - Resolve the owning user/refresh token pair, ensure the token is active, then revoke it using `revokeRefreshToken` with the provided IP and a descriptive reason (as in the original behavior) before persisting changes. 4. `GetAll()` - Return the enumerable of users tracked by the in-memory `_context`. 5. `GetById(int id)` - Fetch the matching user from `_context.Users`; throw `KeyNotFoundException` with the existing message when the user does not exist. Framework considerations - The service is invoked by ASP.NET Core controllers, so make sure to leave method signatures intact and ensure Entity Framework’s in-memory context is updated before saving. - The refresh token collection resides on `User.RefreshTokens`; be careful to maintain its consistency in all flows. - The returned `AuthenticateResponse` must match the fields expected by `UsersController` (JWT plus refresh token string) so that cookies can be written. Edge cases - Multiple refresh tokens per user require removing inactive tokens that have exceeded the configured TTL. - Reuse of revoked tokens should trigger recursive revocation before issuing replacements. - Attempting to revoke or refresh an inactive token must result in `AppException`. Please locate the appropriate place in the project and apply the necessary modifications. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp