Polygon Launches Final Testnet for zkEVM Before it Goes Live on the Blockchain

Polygon Launches Final Testnet for zkEVM

Layer-1 blockchain Polygon has released the second and final public testnet for its zkEVM scaling solution. The highly anticipated upgrade will exponentially increase transaction throughput on the Ethereum blockchain. 

Ethereum-based proof-of-stake (PoS) blockchain network Polygon (MATIC) has launched the second public testnet for its highly anticipated zkEVM solution, before the protocol goes live on its mainnet. Polygon zkEVM is the first of its kind to reach public testnet with an open-source zero knowledge (ZK) proving system. 

zkEVM, considered the “Holy Grail” of blockchain scaling solutions, is the third generation off-chain processing tech that aims to vastly improve transaction speeds, costs and security on Ethereum – the world’s largest blockchain network in terms of transaction volume. The technology is able to process multiple batches of Ethereum transactions by rolling them up in a single proof. Unlike first generation ‘Optimistic Rollups’, It makes use of a mechanism known as ‘Validity Proofs’ to verify and validate transactions on the instant without having to assume that a particular transaction is right until proven wrong. 

One of the major advantages zkEVM has over other scaling technologies is its ability to natively support decentralised applications (dApp) like DEXs (decentralised exchanges) and non-fungible tokens (NFT) that are deployed on Ethereum. Developers can easily port their EVM (Ethereum Virtual Machine) compatible dApps from Ethereum to Polygon using the tech. 

Polygon first launched a public testnet for its zkEVM in October, allowing its community to make use of the scaling protocol. To ensure optimal security of the scaling network, Polygon announced an audit which will be conducted by security firms, Spearbit and Hexens. The audit will evaluate security of the zkEVM’s source code which is designed to conceal on-chain transaction information in a trustless manner. 

Polygon Launches Final Testnet for zkEVM

With the latest zkEVM testnet, Polygon has brought major upgrades to its source code. Developers of the Layer-1 blockchain have introduced a mechanism called ‘recursion’, which could result in the Ethereum network achieving exponential scaling. With the planned update, Polygon’s scaling solution will be able to use one ZK validity proof to validate a batch of other ZK proofs, each of which can in turn validate multiple transactions. With recursion, any given proof can be aggregated and validated by a single, higher-level ZK proof – achieving increased levels of scalability on the blockchain.

“It’s a bit like an infinite regress of two mirrors facing one another, with profound implications for scaling Ethereum,” says Polygon. 

According to Polygon, an optimised ‘prover’ on its zkEVM is now able to generate proofs for a transaction batch in under 4 minutes, which is down from 10 minutes. The system supports multiple provers in parallel, achieving higher scalability for Polygon which leads to proofs being generated at a faster rate and a lower cost – less than $0.4 per transaction. Polygon developers have promised that they will be conducting more research into the area to bring down the fees charged by zkEVM even further.

The upgraded testnet will enable more signature verifications when creating batches, leading to an increase in the number of transactions that can be processed per second. The update will also improve the arithmetization and capacity of the batch to more than double (from 4 million to 10 million) the amount of gas throughput that can fit within a single transaction batch. This means increased transaction throughput with greatly reduced fees. Polygon also announced that its zkEVM testnet will add support for multi-signature smart contracts like Gnosis Safe. 

However, the development team has not revealed when the scaling technology will be deployed on the Polygon mainnet. At the time of writing, MATIC is trading at $0.79 – down 0.8% in the last 24-hours. 

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