feat(BA-2133): ENSIP-19 updates for registration flow for EOAs

[amiecorso]

What changed? Why?
This adds the ability to register basenames (including signing to set the name as primary name in the L2ReverseRegistrar) for EOAs with the new ENSIP-19 compliant contracts.

Notes to reviewers

@arjun-dureja I branched from your SCW registration flow branch to avoid duplicate work, but when I change the base branch here to your branch I see too many changes (this may be because I have changed merged into my branch from master that aren't in yours)

hopefully will settle out when your branch merges down and/or picks up changes from master and we can see a clean diff

How has it been tested?

RegisterENSIP19EOA.mov

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-2133 Registration flow for EOAs in Web

[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 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 0 Sum 1

[vercel]

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

Project	Deployment	Preview	Comments	Updated (UTC)
base-web	Ready	Preview	Comment	Sep 9, 2025 10:33pm