Node Slack Sdk: @slack/oauth@4.0.0 Release

Major Changes

• fc98c8c: Drop Node.js 18 support. The minimum supported Node.js version is now 20.
• fc98c8c: Error classes now extend a new SlackOAuthError abstract base class (which extends Error), bringing @slack/oauth in line with the error handling in @slack/web-api and @slack/webhook. You can catch any error thrown by this package with if (error instanceof SlackOAuthError), in addition to the existing per-class instanceof checks (AuthorizationError, InstallerInitializationError, etc.).

AuthorizationError now populates the standard Error.cause property with the underlying error when one is available (for example, the failure that caused authorize() to reject). The existing original property is still present and carries the same value.

  import { AuthorizationError } from "@slack/oauth";

  try {
    await installer.authorize({ teamId, enterpriseId });
  } catch (error) {
    if (error instanceof AuthorizationError) {
      console.log(error.cause); // the underlying error
      console.log(error.original); // same value — kept for backward compat
    }
  }

The error.code property and ErrorCode enum values are unchanged, so existing error.code checks continue to work. The CodedError interface is retained (it is part of the public CallbackOptions#failure callback signature), but for new code we recommend instanceof checks against SlackOAuthError or a specific subclass.

Note: error.name now reflects the specific class name (e.g. 'AuthorizationError') instead of the generic 'Error'. If you branch on error.name, update those checks accordingly.

• fc98c8c: Updated the internal @slack/web-api dependency from ^7 to ^8. If you pass clientOptions to InstallProvider, the following options are no longer available:

  • clientOptions.agent — Use clientOptions.fetch with a custom fetch implementation instead.
  • clientOptions.tls — Configure TLS via clientOptions.fetch or the NODE_EXTRA_CA_CERTS environment variable.

  import { InstallProvider } from "@slack/oauth";
  import { fetch, Agent } from "undici";

  const installer = new InstallProvider({
    clientId: process.env.SLACK_CLIENT_ID,
    clientSecret: process.env.SLACK_CLIENT_SECRET,
    stateSecret: "my-secret",
    clientOptions: {
      fetch: (url, init) =>
        fetch(url, {
          ...init,
          dispatcher: new Agent({ connect: { ca: myCA } }),
        }),
    },
  });

See the @slack/web-api v8 changelog for the full list of breaking changes that affect clientOptions.

Patch Changes

• Updated dependencies [fc98c8c]
• Updated dependencies [fc98c8c]
• Updated dependencies [fc98c8c]
• Updated dependencies [bb49d99]
• Updated dependencies [fc98c8c]
• Updated dependencies [fc98c8c]
• Updated dependencies [fc98c8c]
  • @slack/logger@5.0.0
  • @slack/web-api@8.0.0