fix: incorrect match length check in getGatewayUrl

[barajeel]

What changed? Why?
I fixed an issue in the getGatewayUrl function where match.length was being accessed. This was problematic because exec() can return null, and trying to check match.length would cause a TypeError. I replaced the check to ensure that match[2] exists, which is safer and prevents errors.

Notes to reviewers
Please review the change to ensure the check is now more robust and does not break functionality. It would be great if you could check other parts of the codebase that might rely on the getGatewayUrl function to confirm no other issues are present.

How has it been tested?
The code has been tested locally to confirm that the issue is resolved and no TypeErrors occur when match is null.

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

BaseDocs

• docs.base.org
• docs sub-pages

[vercel]

@barajeel is attempting to deploy a commit to the Coinbase Team on Vercel.

A member of the Team first needs to authorize it.

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 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 0 Sum 1