Bringing enhanced security, fast finality, and seamless interoperability to Starknet L3 appchains.

Overview

We’re excited to kick off our official partnership with Starknet, contributing to building a secure, scalable, and decentralized rollup ecosystem. Starknet aims to build an L3 appchain ecosystem that inherits the security of its settlement layer, allowing decentralized applications to optimize custom scalability through fractal scaling.

Together, we will work to advance our shared vision of scaling Ethereum while maintaining its security and decentralization, leveraging the capabilities of cryptographic proofs that hold immense power in creating trustless rollup networks.

Note: In this blog, we use the terms appchains and rollups interchangeably to refer to scalability solutions, such as L2s and L3s.

What is Radius?

Radius is dedicated to addressing user challenges on rollups by building a secure sequencing solution that enhances security, guarantees fast finality, and enables interoperability—a future defined by our user-centric model that are key to rollup’s success.

With Radius, rollups can protect transactions from censorship and harmful MEV (where value is extracted through tactics like frontrunning and sandwiching), ensure strong and fast settlement on Starknet, and foster seamless interoperability for users of Starknet L3 appchains.

Developments in Action

This year, we open-sourced the encrypted mempool for Madara. Following the open-source release, our recent Portico Testnet featured sequencing liveness and interoperability support for Madara appchains. We’re excited to extend Radius to any Madara appchains that chooses to leverage our solution for enhanced security, fast finality, and interoperability.

Security from censorship and harmful MEV: Censorship and harmful MEV remain significant risks, particularly in DeFi applications.

Our cryptographic primitive, the trustless sequencing engine, enables rollups to protect individual transactions from harmful MEV (frontrunning, sandwiching). It does this by keeping transactions encrypted until the sequencer commits to a specific order, verifying the encryption process using zero-knowledge proofs (ZKPs) within encrypted mempools. This allows appchain developers to adopt enhanced security measures, protecting users from censorship and harmful MEV.

Fast Finality Guarantees: Fast finality ensures that transactions are settled on Starknet as preconfirmed, without requiring trust in the appchain. This allows users to move on to the next transactions with certainty for finalization, experiencing true appchain scalability. Radius helps align incentives between Starknet validators and appchains to ensure strong preconfirmations and economic security, helping appchains achieve fast finality.

Seamless Interoperability: Shared sequencers facilitate communication between rollups, enabling synchronous and atomic transactions. This allows users to receive preconfirmations for multiple transactions at once for cross-rollup interoperability, greatly enhancing the user experience. Radius supports unique selective composability options, allowing appchains to choose which other appchains to communicate with.

Additionally, to further boost advantages, Radius helps appchains maintain autonomy over their sequencing rights, while creating an ecosystem capable of generating user-protected revenue required for the success of rollups. For more details on how Radius is building user-centric rollups, read our blog.

Supporting Starknet and Madara

We’re committed to helping developers build appchains on Starknet with Madara, an open-source rollup stack for scalable, modular Starknet L3 appchains. Madara is essential in the Starknet ecosystem, enabling easy deployment of customized chains.

Together, we will work to integrate Radius into the Madara stack, fostering a safe and secure environment for rollups and users alike, and uniting the rollups to unlock new and exciting use cases on Starknet.

What’s Next?

This partnership presents a promising pathway for Starknet appchains to build user-centric rollups.

Today, we’re working together with Starknet’s vibrant ecosystem of partners, including Madara, Karnot, Pragma, Kakarot, and Herodotus, to create a more secure and decentralized future for rollups.

If you are building an L3 appchain on Starknet and are interested in Radius, get in touch with Radius on Twitter. Follow @radius_xyz and @Starknet on Twitter for updates.