Jordi Baylina: Hermez – ZK Technology for Scaling Ethereum


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Hermez is an open-source ZK-Rollup optimised for secure, low-cost and usable token transfers on the wings of Ethereum. The Hermez network team is currently developing the next version of the decentralised ZK-Rollup with full support of Ethereum Virtual Machine (EVM) by making a full set of zkEVM opcodes.

Jordi Baylina, the Technical Lead at Hermez, joined us to chat about how the protocol works, the recent merge with Polygon, and the roadmap leading to Eth2.0.

Topics covered in this episode:

  • Jordi's involvement in the infamous DAO hack
  • The Giveth community he created with Griff Green
  • How Hermez use EVM opcodes to combine zk and EVM
  • How the protocol works as a user
  • How do token transfers work?
  • Currently the advantage is in scaling, could this also translate to privacy?
  • Hermez's merge with Polygon - how the joint model will look
  • The Hermez roadmap and how it fits with Eth2.0
  • Jordi's views on the future of blockchain

Episode links:


  • CowSwap: CowSwap is a Meta-Dex Aggregator built by Gnosis. It taps into all on-chain liquidity offering the best prices on all trades and provides some UX perks (no gas costs for failed transactions!) and protects traders against MEV -

This episode is hosted by Friederike Ernst. Show notes and listening options:

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