Polygon makes new sidechain developer stack opensource, supporting ZK-powered Layer 2s on Ethereum

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The Ethereum ( $1,881.48 ) (ETH) ecosystem could welcome a variety of new layer 2 (L2) protocols built on Polygon’s newly open sourced codebase Chain Development Kit, which harnesses zero-knowledge proof (ZK-proof) technology to ensure security and fast finality.

Jordi Baylina, technical lead of Polygon Hermez zkEVM, spoke to Cointelegraph exclusively about the new tool set which is publicly available on a Github repository:

“The motivating idea is simple: it should be easy and seamless for developers to launch a ZK-powered Layer 2 on Ethereum ( $1,881.48 ) , tailored to the requirements of their project.”

Baylina added that a key aspect is that Polygon CDK enables automatic access to liquidity across all of Polygon’s chains as well as the wider Ethereum ( $1,881.48 ) ecosystem, providing “on-demand scale, without fragmenting liquidity”.

The Ethereum ( $1,881.48 ) developer pointed to a number of different projects building CDK-powered chains across a variety of use cases, including from payment-specific L2s, DeFi, gaming, social-specific platforms, and creator or NFT platforms.

Baylina also highlighted the customizability of CDK for different appchains, featuring customizations for rollup or validium mode, zkEVM or another ZK-powered execution environment, various data availability solutions, native token and gas token customization, centralized or decentralized sequencer mode as well as permissioned networks with granular allowlists.

The importance of ZK-proof technology is another factor that Baylina stressed, highlighting Polygon Labs’ belief that zero-knowledge is the future of scaling Ethereum ( $1,881.48 ) . As the Hermez zkEVM lead explains, chains launched with Polygon CDK are automatically connected to a shared ZK bridge and plugged into an “interop layer,” which is a cross-chain communication protocol.

“Suppose there are 1000s of chains in the Polygon ecosystem. It’s inefficient for each of these to submit their proofs directly to Ethereum ( $1,881.48 ) . Instead, the interop layer will receive proofs from chains and submit a single ZK proof that proves the state of all Polygon chains.”

Baylina said the technology unlocks sub-minute cross-chain transactions and creates the perception of a single chain environment.

Cointelegraph also queried the key differences between CDK and other Ethereum ( $1,881.48 ) ecosystem programming languages like Zk-proof pioneers StarkWare’s Cairo codebase.

Baylina explains that the architecture unlocked by Polygon CDK is different in that it enables automatic access to shared liquidity through a ZK bridge and interop layer of an L2 ecosystem secured by working ZK-proofs.

He finished by reaffirming the belief in ZK-proofs as the future of Ethereum ( $1,881.48 ) scalability given its fast finality and withdrawal times, when compared to week-long delay by fraud proofs that feature in Optimistic rollup L2 solutions.

“ZK makes better bridges, but also secures chains by rigorous math, without a need for social-economic components required by fraud proofs.”

Cointelegraph previously explored the Ethereum ( $1,881.48 ) layer 2 ecosystem, unpacking the basics of Ethereum ( $1,881.48 ) rollups and the different approaches to scaling the smart contract blockchain.

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