In this episode of The Defiant podcast, Camila Russo sits down in Buenos Aires (Devconnect) with Marissa Foster (Product, Ethereum Foundation) and Yoav Weiss (security researcher, Ethereum Foundation) to unpack The Trustless Manifesto and the Ethereum Interop Layer (EIL), why “trust assumptions” are quietly creeping into Ethereum’s stack, and what it will take to preserve Ethereum’s core values while making UX actually usable.We dig into the hidden places users are forced to trust intermediaries, from cross-chain interoperability and solvers to something most people never question: RPCs. Then we get practical: the guests walk through the EIL, a new approach to cross-chain UX that aims to deliver one-signature interop without introducing new trust assumptions, plus why the wallet becomes the center of the user’s security model.

Finally, we zoom out: how should wallets warn users, what does “walkaway test” really mean, and why institutions may end up being one of the strongest forces pushing crypto toward less counterparty risk.

Topic list:

• Why Ethereum’s next phase is “mainstream adoption” — and why that raises the stakes

• The Trustless Manifesto: what it is, why it was written, and what it’s trying to prevent

• Where trust assumptions sneak in: bridges, interop protocols, sequencers, oracles

• RPCs as a giant blind spot: “we trust RPCs blindly” and why that can have real-world consequences

• Trustlessness vs UX: why “great values + bad UX” can still lose users

• “You can’t build something trustless on top of something that isn’t trustless”

• What users should demand — and why it can’t require everyone to be a security expert

• How “beat” frameworks help: L2BEAT, upcoming interop criteria, and Walletbeat

• The walkaway test: what happens if the team/server/intermediary disappears (or turns hostile)?

• L2 sequencers: permissioned vs permissionless, censorship risk, and practical exit paths

• Cloud dependencies (Cloudflare outage) and what it reveals about today’s “decentralized” apps

• Ethereum Interop Layer (EIL) explained: one-signature, wallet-centric, self-executing interop

• Why “solvers open the envelope” — and how EIL avoids that trust model

• Liquidity providers, vouchers, and how users pay gas cross-chain without the usual friction

• Standards and coordination: wallets, L2s, and dapps all need to meet in the middle

• The HTTP analogy: Ethereum today as the “pre-HTTP internet” and what seamless interop could unlock

• Institutions and counterparty risk: why big players may push hardest for trust-minimized infrastructure

• What’s next: testnet learnings, audits, standards, wallet integrations, and 2026 mainnet target

Ethereum’s “HTTP Moment” with Marissa Foster & Yoav Weiss

The Defiant - DeFi Podcast