the original transaction format as designed by satoshi nakamoto opens with a version field. the design of having a version number implies that the designer wanted to use hard forks for changes. - discu.eu

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The original transaction format as designed by Satoshi Nakamoto opens with a version field. The design of having a version number implies that the designer wanted to use hard forks for changes. https://zander.github.io/posts/Flexible_Transactions/ 47 comments 8/2/2017 btc