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    Ethereum co-founder Vlad Zamfir develops time machine technology to rewind transactions on blockchain

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    Ethereum researcher and co-founder of Smart Transactions (STXN), Vlad Zamfir, has spearheaded the development of a “time machine” that enables Ethereum users to rewind “Smart Transactions”. The technology allows for the setting of specific conditions under which transactions occur, providing users with a greater degree of predictability and certainty in relation to on-chain transactions. Thus, the permanency aspect that characterises blockchain and smart contracts is handled with more flexibility. The tool is integrated into CleanApp, an application designed for decentralised job-matching with blockchain rewards; if abuse is detected, transactions can be reversed.

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    Vlad Zamfir, an Ethereum researcher and co-founder of Smart Transactions (STXN), has whipped up a virtual “time machine”. It gives Ethereum users the power to roll back “Smart Transactions” on the blockchain—making certain transactions no longer set in stone.

    What’s cool about Smart Transactions is the ability to set specific conditions for when and how a transaction occurs, according to STXN’s other co-founder, Anuj Das Gupta, who chatted with Cointelegraph at a recent conference in Bangkok.

    Das Gupta describes STXN’s tech as a “time machine”. He says it means we can totally predict what’s going to happen with smart contracts in the future. So, for folks who make slip-ups with onchain transactions, this could be a pretty handy solution.

    According to Das Gupta, this updates the current limitations of Ethereum smart contracts because they’re no longer tied to the information known when they were first created. He considers this a crucial resolution for the struggle between permanence and flexibility that goes hand in hand with blockchains.

    The newly appointed CEO of STXN, Boris Mamlyuk, compares blockchain’s indestructibility to the days when people first started sending emails back in the late ’90s. Once you pressed “send”, there was no way to take it back. Then along came Google’s Gmail, which gave folks a short window of opportunity to hit the “un-send” button. Mamlyuk believes similarly beneficial opportunities will arise with Smart Transactions in Web3, which Das Gupta agrees with.

    The STXN crew is building this time travel feature into “CleanApp”, an app that Boris Mamlyuk set up in 2013. This lets you flag up opportunities for jobs (like cleaning tasks) in exchange for handy blockchain rewards. If someone’s caught misusing the app, the transactions will be rolled back, says Mamlyuk.

    He’s also hoping to get this time travel feature set up in other match-making apps—imagine an Uber that’s totally decentralized. Decentralized exchanges like Uniswap already have this match-making feature, but it only supports swaps. STXN wants to build something that allows users to create match-making apps on a grander scale.

    Mamlyuk and Das Gupta have big hopes for STXN—they want to make it work for every kind of decentralized match-making app you can think of. And they’re taking steps to make it happen: they partnered with Ethereum infrastructure company Consensys back in July.

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