1. JO
    Analysis of Bitcoin Cash double spends

    Bitcoin Cash double spends

    Double spend is when a set of coins is spent in more than one transaction. This can happen for various reasons, but one of the reasons is fraud attempts.

    Bitcoin Cash accepts 0-conf payments, which I consider insecure by default. But I would like to have some data to support this, so I went looking.

    Since …

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    04 Mar 2024

  2. JO
    Explain Bitcoin like I’m 10

    How can I buy Bitcoin?
    Generate a password, and then pay someone to send bitcoins to that password.

    A password?! That's it?
    Yep, that's it.

    What do you mean with "send to a password"?
    It means those bitcoins now belong to the owner of that password.

    What if someone finds my password?
    Then he will be able to spend your bitcoins.

    H…

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    04 Mar 2024

  3. JO
    Maximum target hash

    Do you know which Bitcoin constant is this?

    26,959,535,291,011,309,493,156,476,344,723,991,336,010,898,738,574,164,086,137,773,096,960

    Maybe in its hexadecimal format?

    0x00000000FFFF0000000000000000000000000000000000000000000000000000

    Yes, it’s the maximum target hash.

    But what thus it means, and why this “weird” value?

    Bitcoin’s protocol wants b…

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    04 Mar 2024

  4. JO
    Explaining SIGHASH

    Sighash, short for Signature Hash, is a concept within the Bitcoin protocol that determines which parts of a transaction are signed. It plays a crucial role in ensuring the security and integrity of the Bitcoin network.

    By using different Sighash types, users have control over which parts of a transaction are mutable and which are immutable when …

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    04 Mar 2024

  5. JO
    What is Nostr

    Nostr stands for “Notes and Other Stuff Transmitted by Relays”. It is a decentralized social network protocol that aims to create a censorship-resistant and user-empowered alternative to existing social media platforms.

    Key features of Nostr:

    • Decentralized: Nostr does not have a central server or authority. Instead, it relies on a network of rel…
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    04 Mar 2024

  6. JO
    Buy gift cards with Liquid

    Buy gift cards from The Bitcoin Company and pay with Liquid BTC:

    • Buy gift card (includes VISA)
    • Capture Lightning (LN) invoice
    • Call Boltz and make LBTC => LN swap
    • User pays LBTC with Marina wallet

    Try it yourself: Liquid TBC

    Motivation:

    • Because I can 😉
    • To show the possibilities of integrating…
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    04 Mar 2024

  7. BL
    You can now add a comment section to your site with Bhread

    replying to Bhread updates.

    What’s this?

    Bhread now provides a piece of code you can put on your site that will display replies from all of Bhread.

    This feature will also work if the user doesn’t have JS enabled.

    How to add a Bhread comment section in hugo

    Copy this code:

      <script>
        // Wait for bhread to send a message to resize
        wind…
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    18 Feb 2024