Episode 179: Diving into Arbitrum’s Optimistic Rollup

This week, Anna and James host Ed Felten and Steven Goldfeder, co-founders of Arbitrum, an Optimistic Rollup project born before the term “Optimistic Rollup” was even coined.

Ed and Steven tell Arbitrum’s story, from its beginnings as a chain-agnostic university project in 2014 to become an Ethereum-based Optimistic L2 Rollup solution based on fraud proofs. They cover Arbitrum’s interactive fraud proofs, how they differ from other solutions like Optimism, and how Arbitrum and the Optimistic Rollup helps Ethereum scale.

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If you're looking to work in blockchain and the zk space, check out the ZK Jobs board! You'll find great opportunities to work at the forefront of blockchain tech, divided into business, engineering and cryptography positions.

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Thanks to this episode’s sponsor, Aave

Aave is an open source, decentralised non-custodial liquidity protocol on Ethereum.

With Aave, users can participate as depositors meaning they provide liquidity to earn a passive income. or they can also act as borrowers to borrow in an overcollateralized way or undercollateralized way (think: one-block liquidity Flash Loan).

Aave recently deployed a new market on Polygon’s sidechain to let users pay much lower gas fees. Assets can be transferred from Ethereum with the Polygon Bridge and put to use on Aave’s Polygon markets.

Learn more about it here.

So thanks again, Aave!


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Previous Episodes

Episode 208: Digging into Data Availability with Ismail Khoffi from Celestia

This week Anna chats with Ismail Khoffi from Celestia about how and why they’re focusing on building a data availability-first L1 blockchain. Ismail takes us through how data availability can be a problem, primarily with light clients and breaks down the components necessary to understanding the data availability problem such as state changes, the separation of consensus from execution and how Celestia aims to be a pluggable consensus layer.

Episode 207: Journey Through the Cosmos Ecosystem with Billy Rennekamp

This week, Anna chats with Billy Rennekamp about the Cosmos Hub ecosystem, ICF and some of the latest innovations he is watching. They discuss his early experiments with NFTs that led to the Clovers Network and his move into the Cosmos ecosystem. Through this, they cover how the space has evolved and the game changing potential of the IBC paradigm. Billy explains how the Cosmos Hub aims to support innovative modular development and shares the latest research into Interchain security, bridges, governance and much more.

Episode 206: Distilling DeFi Primitives with Guillermo, Alex and Tarun

This week, Anna catches up with Guillermo Angeris, Alex Evans and Tarun. The conversation charts their research on CFMMs, AMMs and related primitives and explores the goals and methodology of this work. They also revisit the topic of private AMMs and specifically their recent work on using differential privacy to achieve a more private system.

Episode 205: Curating JPEGs with JPG

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Episode 204: Keeping Up with the Kusama Network

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Episode 203: MPC and DAGs with Aleph Zero’s Adam Gagol & Matthew Niemerg

This week Anna speaks with Adam Gągol and Matthew Niemerg about Aleph Zero – an L1 project mixing ZKPs and MPCs with a DAG consensus algorithm. They explore their underlying DAG structure and their privacy solutions that leverage zero-knowledge proofs (zk-SNARKs) and Secure Multiparty Computation (sMPC).

Episode 202: Stateless Ethereum & Verkle Tries with Dankrad Feist

This week, Anna speaks with Dankrad Feist, a researcher at the Ethereum Foundation. They talk about the future of the ETH client infrastructure, the Merge, Verkle Tries, and more. They also explore how concepts that originated in the ZK research space have made their way into the ETH client stack.

Episode 201: DeFi’s Multichain Future with Zaki Manian from Sommelier

This week, Anna catches up with Zaki Manian and his new project Sommelier. They explore how Sommelier aims to develop strategies to better serve the more complex emerging DeFi projects like Uniswap V3, and how this would allow the average user to benefit from these new powerful tools. They also discuss Zaki’s vision for multichain DeFi and how the space has evolved over the last few years.

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