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Documentation / @etherfold/browser / IndexerProvider

Type Alias: IndexerProvider ​

IndexerProvider = RequestProvider | MessagePort | (() => MessagePort)

Defined in: packages/browser/src/host/provider.ts:23

THE CHAIN, AS A TAB HANDS IT TO A HOST IN ANOTHER CONTEXT.

A provider is an object with methods, so it cannot be structured-cloned into a worker; a MessagePort can be TRANSFERRED into one. So what crosses is always a port, speaking @eip-1193/over-port, and what a tab may hand over is one of three things:

  • a provider object (a wallet's window.ethereum, a viem transport's provider): the port serves it on a fresh MessageChannel itself, and every request the host makes passes through this tab as a message (the work stays in the worker);
  • a MessagePort whose other end is already served elsewhere, typically by a worker running a node (webevm): requests then go worker to worker and this tab relays nothing. A port can be transferred ONCE, so a host that dies and is restarted cannot be handed it again; see the factory form;
  • a function returning such a port, called once per host the port obtains (the first one, and every restart), which is the form that survives a restart for the provider-in-another-worker case.