37 votes
Accepted

Where is the blockchain saved, in windows?

On Windows the blockchain is stored in C:\ProgramData\bitmonero\lmdb. It's a hidden folder, but if you simply copy paste aforementioned path into your Windows explorer it will go to it. The folder ...
  • 14.9k
31 votes

What is the fastest way to synchronize the daemon?

The fastest way to achieve this, is to download the current blockchain and import it into the daemon: Step 1: Move into the folder where you downloaded the Monero Gui Wallet, e.g: cd ~/Downloads/...
23 votes
Accepted

What are Fluffy Blocks?

The way blocks are currently propagated, every transaction is sent even though a node might have many, if not all transactions already. The idea is to just send the block header and transaction IDs, ...
  • 2,471
21 votes

What is the format of a block in the Monero Blockchain?

Block A block is defined in CNS003 as: block: a set of data (payload) with a block header The structure of a block follows, and it is: Block Structure A block consists of three parts: ...
  • 19.8k
20 votes
Accepted

How much larger are Monero transactions compared to the average Bitcoin transaction?

Most non coinbase Monero transactions are currently around 2,000 bytes (but with significant variation) which is somewhere in the neighborhood of 8 times larger than most Bitcoin non coinbase ...
  • 621
19 votes
Accepted

My blockchain is stuck, how do I "unstuck" it?

Note that, if you are stuck on block 1288639 (or block 1400001) or a few blocks later, you are using a wrong, outdated, version and you should upgrade to the latest version, which can be found here. ...
  • 14.9k
18 votes
Accepted

Blockchain size on hard drive?

The current blockchain size is around 78 GB as of July, 2021. On Windows platforms, you can check the size of the blockchain by checking the size of C:\ProgramData\bitmonero\lmdb\. On Linux/UNIX ...
18 votes
Accepted

What happened at block 202612?

In short, someone managed to exploit a bug in the code, which produced a block that couldn't be validated by the nodes, there's a full analysis of the attack here, https://lab.getmonero.org/pubs/MRL-...
15 votes

How much larger are Monero transactions compared to the average Bitcoin transaction?

Non coinbase transactions can start at a couple hundred bytes, and can go up in size a lot if they have a large number of inputs. The main factors driving up size is the number of inputs and mixin. ...
  • 34.6k
15 votes
Accepted

What are orphaned blocks?

An orphaned block refers to a block that was originally accepted by the network (a part of the network, anyway) as a valid block with a valid hash and valid transactions. Due to the physical ...
14 votes

What are Fluffy Blocks?

It's work done by revler1082, to introduce the Monero variant of compact blocks. As to what it's supposed to do, here's a quote from the github discussion which pretty much sums it up. fluffypony ...
  • 19.8k
13 votes

Looking for an easy explanation about kovri

From the project's FAQ: What is Kovri? Kovri is a secure, private, untraceable C++ router implementation of the I2P anonymous network. What was once a fork of i2pd, Kovri has become a ...
12 votes
Accepted

Can Monero stand as a distinct cryptocurrency, or will its features be brought to Bitcoin via sidechains?

A lot of the other answers address some but not all of the questions. Is Monero intended to be a competitor to Bitcoin, or is the intent to develop technology that will improve Bitcoin? It is ...
  • 5,656
12 votes
Accepted

Are criticisms of Monero's blockchain bloat substantiated?

To some extent, it is, but it is also a common canard that FUDsters like to cling to. Monero transactions are indeed larger than Bitcoin's, and RingCT transactions will be even larger. However, most ...
  • 34.6k
12 votes

What is the fastest way to synchronize the daemon?

Changing the sync size parameter can have a positive impact in some cases. Start the daemon with: ./monerod --block-sync-size 10 Quoting /u/closenix's test results: I've run some tests: Syncing ...
  • 19.8k
11 votes
Accepted

Transaction stuck as "pending" in monero-wallet-cli

You can first use the show_transfers command in monero-wallet-cli to see if your transaction shows there. It should show as "pending". Subsequently, you can use the flush_txpool command in monerod (...
  • 14.9k
11 votes

Are criticisms of Monero's blockchain bloat substantiated?

Privacy isn't free. From what I understand, any coin that provides privacy will deal with at least some degree of bloat, as a private transaction will always add more data to the blockchain than a ...
  • 1,498
11 votes
Accepted

Where is the Monero blockchain stored on Linux build?

The blockchain is stored in $HOME/.bitmonero For testnet, it'll be in $HOME/.bitmonero/testnet You can select a different directory with the --data-dir option if needed, eg: ./monerod --data-dir /...
  • 34.6k
11 votes
Accepted

What does Monero's scaling roadmap look like

I know Monero is dynamically scalable, but everyone knows that simply increasing blocksize does not make a blockchain scale. Saying "everybody knows" doesn't really cut it. Who can say what kind of ...
  • 19.8k
10 votes

How much larger would a mixin=4 Monero transaction be compared to a Bitcoin transaction?

Well, looking at a few transactions gives you the answer quite plainly, at least for the Monero side. I'm not familiar with Bitcoin transaction sizes, but I think they're a few hundred bytes, ...
  • 34.6k
10 votes
Accepted

How do I prove that a payment has been sent to a particular address?

When you send a transaction, a one time random keypair is generated. You can later see it with get_tx_key txid, replacing txid with the transaction id for the transaction in question. You can then ...
  • 34.6k
10 votes

What are Fluffy Blocks?

Jolly Mort and revler1082 already provided a nice description of the Monero Compact Blocks (fluffy blocks) concept. Below is some background for the ideas origination, development and nickname, which ...
  • 4,546
10 votes
Accepted

Why does the option "--verify 0" for monero-blockchain-import not work?

People were abusing --verify 0, using it for files they downloaded from the internet, which is a dangerous thing to do. So it got renamed to --dangerous-unverified-import (prior to this it was named --...
  • 34.6k
9 votes
Accepted

Are the LMDB files cross-platform compatible?

As of v0.10.0, yes the LMDB files are cross-compatible between 32 and 64bit architectures. They have always been cross-compatible between OSs. They are still byte-order dependent but almost everyone ...
  • 4,203
9 votes
Accepted

How can I spend coins if other people can't see my balance?

When you have 5 monero it actually means that you have some unspent outputs with the total value being 5 monero. Those outputs are actually one-time use containers and you always empty them completely ...
  • 19.8k
8 votes

Blockchain properties: what are Height and Difficulty?

Height is the current block a transaction is contained in (or sometimes also represents the highest block of the blockchain). The blockchain consists of "blocks" of grouped transactions. They are ...
8 votes

What kind of pruning techniques does AEON use?

These questions are answered by the pruning FAQ, which was posted by core-developer smooth, who is also a core-team member of Monero. Pruning FAQ Q: What is pruning? A: Pruning refers to removing ...
  • 14.9k
8 votes

How much larger are Monero transactions compared to the average Bitcoin transaction?

The current Monero median block size (last 1,000 blocks) is 286 bytes. The median transaction size is slightly less because some block include multiple transactions. The current median BTC transaction ...
  • 223
8 votes

Can Monero stand as a distinct cryptocurrency, or will its features be brought to Bitcoin via sidechains?

I think the answer is both Aside from the privacy advantage of not having worry about being identified as a ring signatures side chain user, Monero offers other advantages such as a hedge of having ...
  • 621
8 votes

How can one query the blockchain's database?

If you're using python, the py-lmdb module includes a basic CLI. http://lmdb.readthedocs.io/en/release/ Keep in mind that you'll be getting raw data back, not anything in a human-readable format.
  • 4,203

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