feat: open explorer via deep link after social login

[LautaroPetaccio]

Summary

When a user logs in via an OAuth provider (Google, Discord, etc.) and returns to /auth/callback, they currently get redirected to the redirectTo URL. When no explicit redirect destination is set and the OPEN_EXPLORER_AFTER_LOGIN feature flag (dapps-open-explorer-after-login) is enabled, the callback now navigates to a new /auth/open-explorer page that posts the identity to the auth server and opens the explorer via a deep link.

How it works

CallbackPage changes

After successful login in handleContinue, checks whether OPEN_EXPLORER_AFTER_LOGIN is enabled and no explicit redirectTo path was provided (pathname is /). If both conditions hold, marks the user as returning and navigates to /open-explorer with history replace. Otherwise, the existing redirect flow proceeds unchanged.

OpenExplorerPage (new, self-contained)

1. Reads account from ConnectionProvider context (persists across navigation)
2. Gets the identity from localStorageGetIdentity(account)
3. Posts it to the auth server via postIdentity endpoint
4. Constructs a deep link: decentraland://?dclenv={env}&signin={identityId} where env is zone/today/org for dev/stg/prod
5. Shows a 3-second countdown, then attempts to launch the deep link
6. On deep link failure: shows "Try again" (retries with fresh countdown) and "Go back to login" buttons
7. On postIdentity failure or missing account/identity: shows error with "Go back to login"

Feature flag

OPEN_EXPLORER_AFTER_LOGIN (dapps-open-explorer-after-login) — when disabled (default), behavior is completely unchanged.

Test plan

• With flag enabled + no redirectTo: complete OAuth login → callback navigates to /open-explorer → shows countdown → launches deep link
• With flag enabled + redirectTo=/marketplace: callback redirects to /marketplace as usual
• With flag disabled: callback redirects as before (no behavior change)
• Deep link fails: shows "Try again" + "Go back to login" buttons
• "Try again" restarts the countdown and re-attempts the deep link
• "Go back to login" navigates to /login
• No account in context: redirects to /login

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Project	Deployment	Actions	Updated (UTC)
auth	Ready	Preview, Comment	Apr 10, 2026 2:15pm