What is a Layer 2 solution?

A Layer 2 solution is a secondary framework built on top of a blockchain that enhances its scalability and efficiency by processing transactions off the main chain.

zk-Rollups are a Layer 2 scaling solution that uses zero-knowledge proofs to bundle multiple transactions into a single proof, reducing the load on the main blockchain.

What is interoperability in blockchain?

Interoperability in blockchain refers to the ability of different blockchain networks to communicate and exchange data or value seamlessly.

What is a decentralized application (dApp)?

A decentralized application (dApp) is an application that runs on a blockchain network, allowing for peer-to-peer interactions without a central authority.

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Technology

Five Layer 2 Developments to Watch Out For

Published by Jessica Weisman-Pitts

Posted on August 19, 2024

3 min read

Last updated: January 29, 2026

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Illustration of Layer 2 blockchain technology advancements - Global Banking & Finance Review — This image showcases the key innovations in Layer 2 blockchain technology, highlighting developments like Polygon 2.0 and zkSync. These advancements aim to enhance scalability, privacy, and interoperability in the crypto space.

Polygon 2.0: The Value Layer of the Internet

Polygon has long been a leader in Layer 2 solutions, and its latest iteration, Polygon 2.0, promises to solidify its position further. Dubbed “the value layer of the Internet,” Polygon 2.0 aims to enhance interoperability across various blockchain networks. This upgrade introduces advanced features such as modularity and improved scalability, making it easier for developers to build complex dApps that can interact seamlessly across different blockchains. This development is set to create a more interconnected and efficient blockchain ecosystem.

zkSync: Zero-Knowledge Proofs for Enhanced Privacy

zkSync, one of the most prominent zk-Rollup implementations, has made significant strides in 2024. By leveraging zero-knowledge proofs, zkSync offers enhanced privacy and scalability. It enables thousands of transactions to be processed off-chain, with a single proof verifying the entire batch on-chain. This not only reduces transaction fees but also ensures data privacy and security. zkSync’s latest updates include support for EVM-compatible smart contracts, which means developers can now deploy their Ethereum dApps with minimal modifications.

Optimistic About Rollups

Optimism and Arbitrum continue to push the use of Optimistic Rollups to scale Ethereum. These solutions assume transactions are valid by default, only running computations if a dispute arises. In 2024, both platforms have rolled out significant upgrades to enhance user experience and developer adoption. Optimism has introduced its “Bedrock” upgrade, which significantly reduces costs and latency. Arbitrum, on the other hand, has launched Arbitrum One, a more developer-friendly environment that supports a broader range of dApps.

StarkNet: The Power of zk-STARKs

StarkNet is trying something new with zk-STARKs (Zero-Knowledge Scalable Transparent Arguments of Knowledge). Unlike zk-SNARKs, STARKs are more scalable and do not require a trusted setup, making them more secure and efficient. In 2024, StarkNet has integrated advanced features like recursive STARKs, which further enhance scalability by allowing multiple proofs to be aggregated into a single proof. This makes StarkNet an ideal solution for applications requiring high throughput and robust security.

Chainlink CCIP: Creating Collaborative Blockchains

Chainlink’s Cross-Chain Interoperability Protocol (CCIP) enables seamless interaction between different blockchain networks. CCIP allows smart contracts on various chains to communicate and exchange value effortlessly. This capability is crucial for the development of multi-chain applications and the broader adoption of DeFi and NFT platforms.