SIP-36: enabling eth_sendTransaction from within Snaps

[smilingkylan]

The purpose of this task is to allow Snap developers to utilize the eth_sendTransaction method on the Ethereum provider to generate new transactions when necessary.

For the record I'm not 100% certain the specifics of which ETH JSON RPC call needs to be and in what manner, but the objective is to allow a Snap to present newly-created transactions to the user for signing.

---

Note

Adds draft SIP-36 specifying a new permission to let Snaps send transactions via eth_sendTransaction, with example usage and considerations.

• Docs: Add draft SIP in SIPS/sip-36.md proposing Snap-initiated transactions.
  • Introduces permission requirement endowment:eth_sendTransaction (alongside endowment:ethereum-provider).
  • Provides example onTransaction flow using ethereum.request({ method: "eth_sendTransaction", ... }) and UI with @metamask/snaps-sdk/jsx.
  • Notes security and user-experience considerations for presenting new transactions.
  • States no backwards-compatibility impact.

^{Written by Cursor Bugbot for commit 4db720c. This will update automatically on new commits. Configure here.}