# OP Stack Interop Design Overview: Enabling Blockchain interoperability and Horizontal Scaling

**Published by:** [fibon](https://paragraph.com/@amberfinder/)
**Published on:** 2024-04-27
**URL:** https://paragraph.com/@amberfinder/op-stack-interop-design-overview-enabling-blockchain-interoperability-and-horizontal-scaling

## Content

I've recently viewed a fascinating presentation by Mark from OP Labs, where he explains the design of the upcoming native interoperability feature for the OP Stack. This addition will enable the seamless transfer of tokens between chains and facilitate the creation of multi-chain native applications. I just made a summary of this video here. Hope you find it useful. IntroductionThe discussion revolves around the concept of interoperability between blockchain networks and its implications.Emphasis is placed on achieving horizontal scaling and enhancing developer experience.Exploring Interoperability and ScalabilityIntroduction to modular smart contract systems and the potential benefits of horizontal scaling across multiple chains.Consideration of cost-effectiveness and adoption factors for interoperability solutions.Interop Design OverviewDetailed examination of the interop design, including pre-deployment steps like the derivation pipeline and system configuration.Discussion on dependency sets and their role in ensuring fault-proofing across multiple chains.Ensuring Message IntegrityExplanation of initiating and executing messages, along with identifiers and transaction verification mechanisms.Identification of risks associated with executing messages from chains with varying finality times.Managing Risks and SolutionsAddressing risks like unsafe reorganizations and proposing solutions such as shared batch submitting and meta-batches.Discussion on building horizontally scalable backends to counter potential denial-of-service attacks.Future Architecture and BeliefsEnvisioning a future architecture where smart contract applications are horizontally scaled and fees are optimized.Expressing beliefs in the evolution towards verifiable compute and the pivotal role of smart contracts.Implementing Practical SolutionsDiscussion on utilizing smart contracts for ERC20 tokens, ensuring replay protection, and enhancing interoperability.Consideration of potential downsides, project roadmap, and the importance of community engagement.ConclusionEncouragement for engagement with project specifications and discussion boards for further collaboration.Invitation for questions and clarifications to foster ongoing dialogue and development.This structured interpretation encapsulates the key discussions presented in the "OP Stack Interop Design Overview" video, providing a comprehensive understanding of the topics covered. Below is the link to the video: Stay updated by tracking developments on the specifications repository below: https://github.com/ethereum-optimism/specs

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