at_client_sdk
<a href="https://atsign.com#gh-light-mode-only"><img width=250px src="https://atsign.com/wp-content/uploads/2022/05/atsign-logo-horizontal-color2022.svg#gh-light-mode-only" alt="The Atsign Foundation"></a><a href="https://atsign.com#gh-dark-mode-only"><img width=250px src="https://atsign.com/wp-content/uploads/2023/08/atsign-logo-horizontal-reverse2022-Color.svg#gh-dark-mode-only" alt="The Atsign Foundation"></a> [](./LICENSE) [](https://securityscorecards.dev/viewer/?uri=github.com/atsign-foundation/at_client_sdk&sort_by=check-score&sort_direction=desc) [](https://www.bestpractices.dev/projects/8098) # at_client_sdk The main repository for libraries used to build applications on the Atsign Platform. Three categories: SDKs, libraries, and Flutter widgets. ## SDKs [](https://github.com/atsign-foundation/at_client_sdk/actions/workflows/at_client_sdk.yaml) - [at_client](./packages/at_client): the platform-neutral Dart SDK, for command-line apps, headless services, and Internet-of-Things devices. - [at_client_flutter](./packages/at_client_flutter): the Flutter layer on top of `at_client`, for mobile and desktop apps. Adds onboarding / authentication dialogs and device-keychain storage. Flutter web is not a supported target. ## Libraries [](https://github.com/atsign-foundation/at_client_sdk/actions/workflows/at_libraries.yaml) Dart libraries for building Atsign Platform applications. All are published on [pub.dev](https://pub.dev/publishers/atsign.org/packages). - [at_auth](./packages/at_auth): platform-neutral core of onboarding, authentication, and APKAM enrollment. - [at_chops](./packages/at_chops): cryptographic and hashing operations (encryption, decryption, signing, hashing) used by the rest of the SDK. - [at_cli_commons](./packages/at_cli_commons): helpers for Dart CLI / server programs that use `at_client`. Wraps the boilerplate of parsing flags, loading keys, and producing an authenticated `AtClient`. - [at_commons](./packages/at_commons): foundational types used across every package: keys, metadata, atSign validation, root-domain parsing, verb builders for the Atsign Protocol wire format, and the exception hierarchy. - [at_contact](./packages/at_contact): contacts library that persists across different Atsign Platform applications. - [at_lookup](./packages/at_lookup): low-level direct implementation of the Atsign Protocol verbs. Used by `at_client` and `at_client_mobile`. - [at_onboarding_cli](./packages/at_onboarding_cli): command-line tooling and library surface for registering, onboarding, and enrolling atSigns. Useful for headless / IoT applications. - [at_policy](./packages/at_policy): scaffolding for building policy-management services that talk to enforcement endpoints via the Atsign Protocol. - [at_server_status](./packages/at_server_status): logs the status of the root server and the atServer for an atSign of your choice. - [at_utils](./packages/at_utils): utility library: atSign, metadata, configuration, logger. - [base2e15](./packages/base2e15): fork of the upstream [base2e15](https://pub.dev/packages/base2e15) package, kept here for null-safety support. - [dart_utf7](./packages/dart_utf7): fork of the upstream [utf7](https://pub.dev/packages/utf7) package, kept here for null-safety support. ## Flutter packages [](https://github.com/atsign-foundation/at_client_sdk/actions/workflows/at_widgets.yml) > **Status:** Most of the `at_*_flutter` packages listed below are > in the process of being deprecated. Over the next few months > they'll be replaced by example application code rather than > reusable widget packages. The recommended path for new Flutter > work is to read the example app at > [`packages/at_client_flutter/examples/todos`](./packages/at_client_flutter/examples/todos) > and adapt it directly. The packages will continue to publish > until that migration completes. - [at_backupkey_flutter](./packages/at_backupkey_flutter): saves the backup key file for an onboarded atSign. - [at_chat_flutter](./packages/at_chat_flutter): chat feature using atSigns and the Atsign Protocol. - [at_common_flutter](./packages/at_common_flutter): common widgets used by other Atsign Flutter packages. **Already deprecated** in favour of `at_client_flutter`. - [at_contacts_flutter](./packages/at_contacts_flutter): contact-management widgets for atSign-based apps. - [at_contacts_group_flutter](./packages/at_contacts_group_flutter): group functionality on top of `at_contacts_flutter`. - [at_events_flutter](./packages/at_events_flutter): event management. - [at_follows_flutter](./packages/at_follows_flutter): a basic social "follows" feature for atSigns. - [at_invitation_flutter](./deprecated/flutter/at_invitation_flutter): deprecated; invite contacts via SMS or email using the [`at_client_flutter` snippet](./packages/at_client_flutter/example/lib/snippets/at_invitation.dart). - [at_location_flutter](./packages/at_location_flutter): share location between two atSigns and view on [OpenStreetMap](https://www.openstreetmap.org/). - [at_login_flutter](./packages/at_login_flutter): zero-trust logins using the Atsign Protocol. - [at_notify_flutter](./packages/at_notify_flutter): notification surface. - [at_sync_ui_flutter](./packages/at_sync_ui_flutter): UI indicator for the SDK's sync process. - [at_theme_flutter](./packages/at_theme_flutter): theme switching. ## Installation Each package's own README and pub.dev page have the installation details. Click any of the links above. ## Maintainers [Atsign Foundation core devs](https://github.com/orgs/atsign-foundation/teams/atcoredevs)