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Sidechain in 2019: Bringing Blockchain Technology Mainstream

Nisum LogoBlockchain is arguably one of the most significant technologies of the present moment, changing business as usual from Wall Street to auto manufacturing, healthcare to art. Less discussed but no less important is its younger sibling, sidechains. Far from a new concept, the idea of sidechains has actually been around since 2014, specifically, to address one of blockchain’s main challenges: scalability.

In early October 2018, Blockstream launched Liquid, bitcoin’s first sidechain and one of the most advanced implementations and use cases for sidechain — which begs the question, how will this technology further disrupt the industry in 2019 and beyond?

But first, let’s define exactly what it is that we are talking about. To cite an extremely technical definition from Hacker Noon:

“A sidechain is a separate blockchain that is attached to its parent blockchain using a two-way peg. The two-way peg enables interchangeability of assets at a predetermined rate between the parent blockchain and the sidechain. The reverse happens when moving back from a sidechain to the main chain.”

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In simpler terms, sidechains allow nodes from one blockchain to be securely used in a separate blockchain and moved back to the original blockchain.

When it comes to business value, sidechains enables blockchain to scale by allowing certified information from one blockchain to be used for another by deriving security from the main chain, markedly amplifying the use cases for worldwide blockchains apart from cryptocurrencies.

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We do need to clarify something very important: sidechains will not replace blockchains. Rather, they will solve many of the main issues plaguing blockchain today. In fact, sidechains can potentially solve two of the most prominent problems with blockchain today; scalability and flexibility.

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For scalability, sidechains will allow for more TPS because a different sidechain can maintain unrelated transactions that can be executed at the same time. In terms of flexibility, sidechains will allow for the ability to work with multiple currencies, as we can have different sidechains for different currencies which can then be transferred back onto the main blockchain.

Taking a real-world example, we know that both Bitcoin and Ethereum have issues with flexibility and performance. Sidechains have been designed to fix those issues; for example Plasma for Ethereum and RSK for Bitcoin. In the case of RSK-SBTC, the sidechain works as a “lock and unlock” protocol to exchange data, ensuring stability and increasing performance near 100 TPS.

That’s not to say sidechain is a magic bullet. There are still a few things to consider, for example, sidechains will add multiple independent, unsynchronised blockchains connected to the main blockchain. This will cause security constraints that will have to be addressed very carefully.

What we can be sure of is that sidechain will have a much larger role in conversations around blockchain and cryptocurrency. Sidechain technology effectively amps up blockchain’s horsepower, allowing disruption to occur at a much faster rate by adding more TPS and flexibility, and most importantly, facilitating blockchain applications in regular business scenarios.

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  1. […] are minted on proof-of-stake blockchains that are attached to a parent blockchain like Ethereum. This enables the NFTs to be moved when a transaction is consummated, and it is […]

  2. […] σε μπλοκ αλυσίδες απόδειξης συμμετοχής συνδεδεμένο σε μια μητρική αλυσίδα μπλοκ όπως το Ethereum. Αυτό επιτρέπει τη μετακίνηση των NFT κατά […]

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