SIP-26: Account Router Snap

[danroc]

Abstract

This SIP proposes a new API to be implemented by a new Account Router, allowing the forwarding of signing requests to the appropriate account Snap (i.e., Snaps that implement the Keyring API).

Motivation

The Keyring API is being modified to support non-EVM chains. However, a challenge arises in identifying the correct account Snap that should receive the signing request, as this information is often only obtainable from the request itself, which varies based on method and chain.