As more and more L2s launch promising to scale Ethereum, they end up competing for the same market share, userbase and liquidity. Apart from this harsh reality, crosschain interactions should be as seamless as possible in order to bridge different L2 ecosystems. Polygon envisions a scalable future in which various zero knowledge rollups post their proofs on an aggregation layer before settling on Ethereum, thus lowering latency and transaction costs as crosschain interactions take place expeditiously, without involving the L1 mainnet.

We were joined by Sandeep Nailwal & Brendan Farmer, to discuss Polygon’s aggregation layer and how it aims to solve the current fragmentation of Ethereum L2 scaling solutions.

Topics covered in this episode:

• Polygon’s ZK expansion and the acquisition of Mir Protocol
• Polygon’s aggregation layer
• Block building between different L2s
• Shared sequencing & asynchronous sequencing
• Security guarantees of the aggregation layer
• Sequencer decentralisation & censorship resistance
• Chains using Polygon’s aggregation layer
• Pessimistic proofs
• Can optimistic rollups be included in the aggregation layer?
• Type 1 prover and Plonky3
• The evolution of ZKP systems
• Ensuring ZK rollup integrity
• The future of scalability

Episode links:

• Sandeep Nailwal on Twitter
• Brendan Farmer on Twitter
• Polygon on Twitter

Sponsors:

• Gnosis: Gnosis builds decentralized infrastructure for the Ethereum ecosystem, since 2015. This year marks the launch of Gnosis Pay— the world's first Decentralized Payment Network. Get started today at - gnosis.io
• Chorus One: Chorus One is one of the largest node operators worldwide, supporting more than 100,000 delegators, across 45 networks. The recently launched OPUS allows staking up to 8,000 ETH in a single transaction. Enjoy the highest yields and institutional grade security at - chorus.one

This episode is hosted by Friederike Ernst.