Bitcoin Arithmetic – Filling in the Blanks: Preventing Double-Spending
Imagine if you could magically give the same candy to two friends at the same time. That wouldn’t be fair. Bitcoin solves this problem with the notebook: every payment is written down, and the network checks it so no one can spend the same coin twice. Each computer makes sure the candy has only been given away once. This keeps Bitcoin safe and honest for everyone.
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Block Height: 915393