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[FAQ] What is a User Activated Soft Fork (UASF)?

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    Litecoin is moving towards catching up with head at version 0.14 and they are using Bip148 to upgrade / perform forks.


    What is a User Activated Soft Fork?

    BIP148 & UASF FAQ
    What is a UASF?

    UASF stands for User Activated Soft Fork. It’s a mechanism where the activation time of a soft fork occurs on a specified date enforced by full nodes, a concept sometimes referred to as the economic majority. A UASF requires a lot of industry support and coordination, which is good practice for eventual hard forks which requires even more industry coordination. In the past, a UASF was successfully carried out to activate the P2SH soft fork (BIP16).

    See UASF information write-up:

    The UASF concept was combined with SegWit activation in the BIP148 proposal which can be found here: github.com/bitcoin/bips/blob/master/bip-0148.mediawiki.