anon-rpc demo

Watch an ETH balance through a hash-pinned worker running in a null-origin sandbox.

Connection

Bootstrap RPC URL

Worker RPC URL

Specifier contract

Watch

Address

idle

Balance

— ETH

Under the hood: the bootstrap RPC is used once to read workerHash() and workerResolvers() from the specifier contract; the worker bundle is fetched, its keccak256 verified against the pinned hash, and only then executed — inside a Web Worker in a null-origin sandboxed iframe with no access to this page. Balance queries flow through the worker's fetch. Settings persist in your browser.