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Using a Hybrid UTXO and Account-based State Model in a ZK Rollup

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Using a Hybrid UTXO and Account-based State Model in a ZK Rollup

Duration: 00:23:37

Speaker: Bobbin Threadbare

Type: Talk

Expertise: Intermediate

Event: Devcon 6

Date: Oct 2022

Many rollups choose to follow Ethereum’s account-based state model. We explore an alternative approach: a hybrid of a UTXO and an account-based model, specifically in a context of a ZK rollup. This approach offers a number of interesting properties including local transaction execution, support for privacy-preserving smart contracts, and reduced state bloat. In this talk we describe tradeoffs between different state models and cover the specific design choices we’ve made with Polygon Miden.

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BT

Bobbin Threadbare

Bobbin is a project lead of Polygon Miden - a STARK-based ZK-rollup being developed at Polygon. Prior to joining Polygon, Bobbin was ZK researcher at Facebook's Novi, where he led the development of Winterfell, as highly-performant general-purpose STARK prover. Besides Winterfell, Bobbin has made multiple contributions to the field of STARK-based proving systems, including a STARK-based virtual machine (Distaff) and AirScript/AirAssembly languages (work supported by the Ethereum Foundation).

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