EIPS_

A proposed Ethereum standard. ERC-8009 defines a stateless, singleton proxy that wraps arbitrary contract calls and enforces user-supplied balance-delta constraints, so a signer can verify exactly which tokens they will spend and receive before signing, instead of trusting a dApp UI. That closes the gap where opaque DeFi calldata, slippage and MEV produce outcomes the user never agreed to.

The proposal has its own organisation carrying the whole effort: a documentation site (erc8009.xyz), the reference frontend, and — the part worth showing a wallet client — a fork of Trezor firmware demonstrating how ERC-8009 integrates into a hardware wallet's signing screen.