This is a quote from the book "On Zero Confirmation Transactions" by Chris Pacia
...This article is a response to a growing meme in the Bitcoin community that ‘zero confirmation transactions were never safe’ and therefore the core developers should change the code to make z ero confirmation transactions totally unusable. Not only is this meme false, but the proposed code changes substantially reduce the utility of Bitcoin in the short run, and possibly the long run as well.

What are zero confirmation transactions?

Here’s a little refresher for those unfamiliar with how Bitcoin works. When someone sends you bitcoins, the ...
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