James Prestwich

James Prestwich is a blockchain engineer and researcher best known as a recurring co-host of the Zero Knowledge Podcast around 2020 to 2022. He founded Summa, a firm designing cross-chain financial contracts that famously ran a trustless Dutch auction spanning the Bitcoin and Ethereum blockchains, and later worked at cLabs on the Celo platform. His writing on cross-chain systems, including a widely cited guide to transaction sequencing, helped shape early thinking on interoperability and ordering.

32 talks by James Prestwich

• ZKPodcast: Tarun and James talk Flashloans & more
• Panel: Bridges to...Somewhere? (Devcon5)
• zkSummit - Roll-up and Roll-out - James Prestwich (Co-founder, Summa)
• Why Dapp Users Will Hate Cross-Shard Communication (and What You Can Do About It) - Devcon5
• ZKPodcast: Post-Devcon5 catch-up with Tarun, James & Georgios
• All Core Devs - Execution #62
• ZKPodcast: Blockchain 101 - What are smart contracts?
• #265 James Prestwich: Summa One – Cross-chain Financial Instruments and Contracts