http://imil.net/blog/tags/bytes/ Recent content in Bytes on iMil.net Hugo en-us Wed, 13 May 2020 14:24:35 +0200 http://imil.net/blog/posts/2020/bitcoin-leveldb-debugging/ Wed, 13 May 2020 14:24:35 +0200 http://imil.net/blog/posts/2020/bitcoin-leveldb-debugging/ <p>I&rsquo;ve contributed to a small project I found useful in my digging of <em>Bitcoin</em>&rsquo;s <em>LevelDB</em> databases structure; <a href="https://github.com/yuuichi-fujioka/go-leveldbctl">leveldbctl</a> is a <em>CLI</em> tool that permits to parse a <em>LevelDB</em> database rather simply. But it was missing a critical function for my use case, hexadecimal fields handling, which are heavily used by <em>Bitcoin</em>. Until now it was only capable of reading / writing <code>strings</code>.</p> <p>It is now possible to use it to retrieve values from <code>Bitcoin</code>&rsquo;s (and probably a lot more cryptocurrencies) block <code>index</code> keys, i.e.:</p>