This is a quote from the book "On Zero Confirmation Transactions" by Chris Pacia
...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
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What are zero confirmation transactions?
Here’s a little refresher for those unfamiliar with how Bitcoin works. When someone sends you bitcoins, the
transaction is broadcast to all the nodes in the Bitcoin network. The mining pools collect these new transactions and temporarily hold them in memory. At this point we say that transactions are ...