[BA-3331] Update Farcaster social link domain to farcaster.xyz

[eric-ships]

What changed? Why?

Farcaster is transitioning from warpcast.com to farcaster.xyz as the canonical domain for user profiles. This change ensures that when users add their Farcaster handle to their Basename profile, the generated link points to the correct domain.

This change specifically targets user social profile links displayed on Basename profile pages. It does not affect:

• Platform navigation links (Base's official Farcaster links remain unchanged)
• Channel links or compose URLs
• Cast embed links

Notes to reviewers

The change is isolated to the formatSocialFieldUrl function which is used by the UsernameProfileCard component to render social links on user profiles

This only affects the Farcaster social field (UsernameTextRecordKeys.Farcaster) - other social platforms (Twitter, GitHub) remain unchanged.

The domain change maintains backward compatibility as farcaster.xyz properly redirects user profile URLs.

How has it been tested?

Tested it locally and verified the new link opens to the expected domain.

Have you tested the following pages?

BaseWeb

• [] base.org
• [] base.org/names
• [] base.org/builders
• [] base.org/ecosystem
• [] base.org/name/jesse
• [] base.org/manage-names
• [] base.org/resources

[linear]

BA-3331 Update FC link on Basenames

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Comments	Updated (UTC)
base-web	Ready	Preview	Comment	Nov 27, 2025 0:47am

[cb-heimdall]

✅ Heimdall Review Status

Requirement	Status	More Info
Reviews	✅ 2/2	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2