Bitcoin core utxo database

UTXO. An unspent transaction output. After an output has been “used up” in a transaction, it cannot be used again. So a spent output is like a.
Table of contents

Can you describe the consensus bug referenced here? Questions Did you review the PR? What are the different layers of the UTXO cache? What do the flags associated with CCoinsCacheEntry objects mean? Why do we go to the trouble of maintaining these flags?


  • bitcoins not showing up in wallet.
  • Bitcoin's UTXO Set Explained - Mycryptopedia?
  • bitcoin miner amazon cloud?
  • Bitcoin Core (ch 2): Data Storage - Bitcoin Wiki!

This test has a lot of randomness. How do we ensure full coverage? Do you understand the benchmarks that are given as justification for this PR? Given the sensitivity and complexity of the UTXO cache, how should we think about the trade-offs of supporting this kind of operation?

Feel free to say hi, even if you arrive in the middle of the meeting! Just go ahead and ask. If it's off-topic we'll tell you.

Where are unspent transaction outputs (UTXOs) stored?

You don't need to wait for me to ask a specific question — just jump in at any point. Before we start talking about things like cache flushing, though, and in-memory vs. Who can tell me what the CCoinsView class is? Why have an intermediate CCoinsViewBacked? If we try to fetch a coin from that view and it fails, it'll try the fetch from CCoinsViewCatcher. Is there another in-memory store on top of CCoinsViewCache?

Bitcoin Tech Talk

FRESH basically says "the cache that sits behind me has never seen this entry - I haven't flushed it yet. So if the entry gets removed, I can just remove it from my cache - no need to tell my parent. Is that correct? I thought 'pruned' meant 'all the outputs of this tx have been spent, we can remove it from our pre No need to discuss here though! Thanks James! I learned a lot as a fly on the wall. We apply that block atomically and never need to apply that output to our UTXO set when we flush. This obviously this depends on how big the UTXO database is and how fast your computer is.

The file should be around 7GB roughly 2.

Understanding Blockchain: Inputs and Unspent Transaction Outputs (UTXO) - #onChain

Again, this depends on how many entries are in the UTXO database, but it also depends what fields you choose to have in the results:. This tool works for Bitcoin Core 0.

Bitcoin’s UTXO Set Explained

You can check your version with bitcoind --version. Older versions of bitcoind have a different chainstate LevelDB structure. The structure was updated in 0. Here's an interesting talk by Chris Jeffrey that explains how you could crash Bitcoin Core with the old chainstate database structure.

Nonetheless, if you really want to parse an old-style chainstate database, try one of the similar tools at the bottom of this page.


  1. maquina bitcoin sao paulo.
  2. Understanding the data behind Bitcoin Core.
  3. How big is the UTXO database? - Bitcoin Stack Exchange!
  4. Latest commit!
  5. Skip to content. MIT License. Branches Tags. Nothing to show.

    Where are unspent transaction outputs (UTXOs) stored?

    Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. Git stats 24 commits. Failed to load latest commit information. Apr 8, Jan 7, Jan 6, Jan 9, View code. How big is the file? What versions of bitcoin does this tool work with? How does this program work? Can I parse the chainstate LevelDB myself? Thanks Similar Tools Links. Install First of all, you need to have a full copy of the blockchain.