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Published Feb 23, 2022

Episode 500: Sergey Gorbunov on Blockchain Interoperability

Explore blockchain interoperability with Sergey Gorbunov of Axelar as he delves into connecting diverse ecosystems, highlighting Ethereum's programmability role and Axelar's architecture for decentralized and secure communications, critical for enhancing DeFi and NFT markets.
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  • Challenges

    Blockchain interoperability faces significant challenges, primarily due to the diverse consensus mechanisms and trust assumptions required for cross-chain interactions. explains that different blockchains, like Bitcoin and Ethereum, have unique consensus protocols, making seamless communication complex 1. He highlights the analogy of Axelar's cross-chain gateway protocol to the Internet's BGP, emphasizing its role in routing information across autonomous networks 2.

    The vast array of different software stacks and consensus protocols people have built is what makes interoperability challenging.

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    Trust assumptions increase with each additional chain in a transaction path, complicating the process further 3.

       

    Methods

    Existing methods for blockchain interoperability include token bridges and centralized exchanges, but they often introduce friction and trust issues. discusses the cross-chain transfer protocol, which facilitates asset movement across blockchains by acting as an application layer above the network layer 4. He also notes that centralized exchanges have been the primary interoperable systems, but they come with limitations due to their centralized nature 5.

    Centralized exchanges to date, they've been actually the only interoperable systems that have scaled.

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    Axelar aims to provide a decentralized solution that spans multiple blockchains, similar to how Akamai operates as an overlay network in traditional networking 6.

       

    Applications

    Improved interoperability could revolutionize blockchain applications, particularly in DeFi and NFT markets. highlights that decentralized exchanges can enable innovative financial products by allowing seamless asset swaps across chains 7. He also points out that decentralized systems foster innovation by enabling developers to build on each other's work without the constraints of centralized control 8.

    A decentralized open stack allows people to continue innovating and reaching audiences that centralized tags cannot do.

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    This open environment could lead to new applications beyond finance, such as decentralized data storage solutions like Filecoin 9.

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