Questions tagged [blockchain]

A distributed ledger of all transactions both past and present, without revealing who the funds came from or went to.

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Monero local node: block set up

I've used Bitcoin before, but I'm on my third day of trying to figure out Monero. I tried to set up a local node on a separate computer, but it took a few days to synchronize. Then I got tired of ...
Barrel Titor's user avatar
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Slow blockchain sync

I'm trying to figure out why my Monero node is syncing so slowly. I have experience syncing other PoW nodes before (like BTC, for example), but it was never this slow (I've spent over 2-3 weeks at ...
Tadej Gašparovič's user avatar
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Only 90% of Blockchain Downloads, Sync is Slow

I need(ed) to generate wallet addresses and being new to working with cryptocurrencies, the initial research I did about how to generate wallets (via the official documentation) told me that running a ...
adam-asdf's user avatar
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How do I get notice of a Monero reorg and the transactions that were dropped/modified in those blocks?

In monerod, I see an example printout: BLOCK ADDED AS ALTERNATIVE ON HEIGHT ########## What is a recommended way to send information about this reorg to another program? The main use-case is detecting ...
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Switching blockchain locations on a Windows machine

strange thing happened. I am in the middle of syncing blockchain ~65%, and first decided to do it on a HDD. Apparently it needs a lot of random I/O - I can hear the disk working. It's going to take ...
Jurrer's user avatar
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Is Monero affected by the year 2038 / 2106 problem?

Unix timestamps usually are stored as a 32 bit integer, either signed or unsigned which will overflow either in 2038 or 2106. How are timestamps currently stored in Monero's codebase and blocks?
janowitz's user avatar
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Does Monero require SSD for decent performance once it finishes the initial synchronization?

The warning in the logs The blockchain is on a rotating drive: this will be very slow, use an SSD if possible doesn't explain if just the synchronization will be slow, or also running the node ...
Petr's user avatar
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What is the path to the blockchain for a pruned node in the GUI wallet?

I went to the advanced section for the GUI and set the path for the node as: nicholas@mordor:~$ nicholas@mordor:~$ ls -hal Monero/lmdb/ total 11G drwx------ 2 nicholas nicholas 4.0K Jun 5 00:47 . ...
Nicholas Saunders's user avatar
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How does a view only wallet work and what is stored?

In relation to blockchain scanning and disk usage, as well as disk space, how does a view only wallet work? Specifically: 1.) does the blockchain need to be scanned? 2.) how much free space is ...
Nicholas Saunders's user avatar
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Transactions in Monero

I need to understand and know how transactions work in Monero. Whether the transactions are similar or completely different from other blockchains. Also, an example javascript implementation would be ...
AlexCav's user avatar
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How to prune the blockchain for GUI wallet? [duplicate]

Towards recovering a wallet with less than ten transactions, looking to run the --prune-blockchain flag within the GUI. I'm selecting options as: Simple mode Easy access to sending, receiving and ...
Nicholas Saunders's user avatar
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How to free up space from the GUI wallet scanning the blockchain?

I seem to have run into a full hard drive while scanning the blockchain: nicholas@mordor:~$ nicholas@mordor:~$ cat monero.gui/monero-wallet-cli.log 2023-05-20 10:53:31.795 7f288f9c89c0 INFO ...
Nicholas Saunders's user avatar
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Does each GUI wallet need to iterate the blockchain for transactions?

In context of: How to complete synchronization through a remote node? How to install the monero wallet GUI? When the wallet GUI completes so that zero blocks remain, how much overlap is there with ...
Nicholas Saunders's user avatar
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353 views

How to configure the daemon to use a remote node?

Two questions on using a remote node as below: nicholas@mordor:~/monero4$ nicholas@mordor:~/monero4$ monero-wallet-cli --daemon-address node.moneroworld.com:18089 This is the command line monero ...
Nicholas Saunders's user avatar
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How to determine the synchronization status of the daemon for wallet balance? [duplicate]

I'm most certainly not looking to "run a full node" nor to download the blockchain. While the daemon looks to be running correctly: nicholas@mordor:~$ nicholas@mordor:~$ monerod --db-sync-...
Nicholas Saunders's user avatar
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daemon error: Exception in main! Failed to initialize p2p server

following up with starting a recovered wallet: nicholas@mordor:~$ nicholas@mordor:~$ monerod --prune-blockchain 2023-05-20 11:00:30.349 I Monero 'Oxygen Orion' (v0.17.2.0-unknown) 2023-05-20 11:00:30....
Nicholas Saunders's user avatar
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Can I download the blockchain, with a regular harddrive?

Can I download the blockchain, with a regular harddrive? I don't have an SSD one. Is there away for me to download the block chain faster? Right now my Monerod says (69%, 846310 left). The net hash is ...
MoneroMania's user avatar
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How can I run monero node in LAN?

Sorry to bother. I'm new to Monero. Recently I followed this article (https://github.com/moneroexamples/private-testnet#step-2-start-first-node) to set up a private chain consist of three nodes. But ...
Harry's user avatar
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Can someone explain me what is monero-blockchain-usage?

How can I access the monero-blockchain-usage and what is the use of it ? could someone explain after input our db what should I do ?
ZORO's user avatar
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Blockchain is (fully?) synchronized, but lmdb size is 1 Gb

I'm just starting with Monero. I'm using pre-installed Monero (XMR) Wallet on Whonix. My settings are: Advanced mode Portable mode enabled Local node, with location of blockchain set to a separate ...
Zaza's user avatar
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Is the duration of pruning roughly proportional to the size of the data.mdb file?

I have the blockchain already downloaded. I stopped monerod and restarted it with a configuration file with prune-blockchain=true in it. I started monerod again and the last bit of output was: 2022-...
Dave Scotese's user avatar
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Graft blockchain

I want to make a node to mine on p2pool, but i don't want to download 100GB of the blockchain. Is it possible to skip downloading the beginning of the blockchain, like how git can graft when setting ...
PranshuTheGamer's user avatar
1 vote
2 answers
370 views

Why does Monero refresh even if I use remote node?

I haven't used my wallet for a couple of months. Today I opened my wallet and it started refreshing, even if I use remote node. It refreshes about 150k blocks and it has already taken about 2 hours ...
mooko's user avatar
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What is a fakechain?

The output of monerod --help and monero-blockchain-import --help show a --keep-fakechain option: --keep-fakechain Don't delete any existing database when ...
Flux's user avatar
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Last 3 months of block in the blockchain are taking forever to load

I am downloading the blockchain. It's currently at 20-40 blocks loaded per minute, while I've been able to load the first 128GB in 2h, which represents 96% of the chain. There only remains 80k blocks, ...
Mouloud85's user avatar
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7 votes
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13k views

What is the current monero blockchain size in GB?

How can I quickly check what is the current size of the monero blockchain in GB? I want to download the Monero blockchain. But I'm not sure if I have enough free space on my disk. Before I download ...
Michael Altfield's user avatar
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Fastest and easiest way of downloading a few thousand (cca. 200k) consecutive blocks

For a project, I need to download and analyze a few thousand (say around 200k) consecutive blocks with all the corresponding transactions data. I'm most interested in recent blocks. What would be the ...
István András Seres's user avatar
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516 views

Has anyone tried storing the Monero blockchain on remote network storage?

I'm wondering about different ways that the blockchain could be stored to make it cheaper for people. Just wondering if anyone has tried running a node with the blockchain data stored remotely (e.g. ...
Nick W.'s user avatar
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Missing files when moving the bitmonero folder

I decided to move the bitmonero folder to a 256GB penstick as my hard drive was nearly full. However when I copied the folder to the new location I noticed that 2 files seem to have disappeared, ...
Dee T's user avatar
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How to connect more to the community?

We are honored to share with you our conceptual artwork of $XMR It's aspect ratio is 16:9 so you can use it as wallpaper for your smartphones. Using it is not prohibited by law and we would be happy ...
AOI Card's user avatar
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202 views

I sent some monero to a "standard XMR" address while my wallet uses base58 format, was it lost?

The sender was having some troubles to withdraw using the base58 format, which starts with a 8. So I used this website thinking the worst that could happen is me having to manually sweep the address ...
Base58's user avatar
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276 views

What's the main difference between Atomic Swap and Bisq?

I do not know if this can be a monero-related question. I have the following one: what's the main difference (or the differences) between Atomic Swap and Bisq? Bisq seems a P2P market that connects ...
onerom's user avatar
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3 votes
1 answer
801 views

Why is monerod so slow on a rotating drive?

My laptop has a 500GB SSD and I couldn't spare two fifths of it for the blockchain so I plugged in a portable 2.5" HDD, altered the command appropriately and it said: The blockchain is on a ...
cardamom's user avatar
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2 answers
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Error: Couldn't connect to daemon: 127.0.0.1:18081 every single time

I'm running Windows 10 so I can't use any Linux commands which everything I've looked up has when faced with this issue. I've uninstalled and reinstalled it a few times, I've turned off my antivirus ...
Jake's user avatar
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What is the 3rd and 4th value in the hardforks.cpp?

I know what the first two values are. Version and then block height. But then there is a third value with nothing then the fourth value which contains a very long number, I do not know what it means. ...
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2k views

Time Required for Initial Blockchain Sync

I am a beginner interested in trading and mining the Monero Cryptocurrency. I am using an Arch based Linux distribution and I have downloaded the monero-gui package from the Arch package repository to ...
Nick's user avatar
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RE:Monero GUI - "Start Mining" greyed out

Excuse the noobness. I have installed Monero GUI Wallet on a persistent TAILS OS USB bootable drive. I have downloaded the Monero Blockchain and fully synhronized the Wallet and Daemon. All working ...
Mr Monoro1's user avatar
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307 views

Why am I unreachable?

I'm certain the forwarded port of 18081, 18089, 18080 are forwarded to the machine and i've completely disabled windows firewall. Is this my ISP blocking this port? C:\Users\monero-gui-v0.17.2.1>...
James's user avatar
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Pass data from sender to receiver in a transaction

I want to pass data from sender to receiver in a transaction. I need to make a URI with a description field, but one that the receiver can't read. I've tried to create an old style payment ID (32 ...
datazone's user avatar
1 vote
1 answer
178 views

How to back up only new blocks on blockchain using rsync

Using rsync in the normal way copies the entire blockchain to backup every time new blocks are added. To get around this, I used the --append flag, however even though the size of the backup is the ...
i9pp0's user avatar
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1 vote
1 answer
70 views

Does monerod generates new block template on a repeat call of get_block_template?

I want to know if it's safe to assume that multiple calls of get_block_template rpc method will give me the same block template until the blockchain is updated. By updating, I mean the appearance of a ...
Oroffe's user avatar
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2 answers
238 views

Would It Be Technically Possible To Delete Old Blocks From A Blockchain?

From what I understand, a cryptocurrency mine needs to store a copy of the entire blockchain in order to be able verify transactions, which is why most wallet owners are not miners. The more ...
JohnBig's user avatar
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1 answer
58 views

Are the target key, k_image tx pub unique?

Are the target key, k_image tx pub unique and no repetitions in all blockchain?
WhiteRabbit's user avatar
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1 answer
77 views

Can I store the Monero local blockchain on a Ledger Nano S?

So all I know about Ledger or Trezor is that you can make wallets from any cryptocurrency. I want to import my local blockchain once and forever, instead of getting an external SSD disk (for fast ...
Captain Syria's user avatar
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2 answers
2k views

How to keep Monero daemon from crashing during initial sync?

I found that my Monero GUI wallet keeps crashing during the initial blockchain synchronization, and when I start off from where it crashed, data.mdb in C:\ProgramData\bitmonero\lmdb has been corrupted ...
geomancer's user avatar
2 votes
1 answer
299 views

If I update the Monero GUI, do I need reinstall the blockchain?

I'm having trouble seeing the funds in my wallet so I want to update to a newer version. However the 90GB blockchain is quite large and I'm wondering if I need to install the blockchain again or does ...
MrMoody's user avatar
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1 vote
1 answer
53 views

RingCT missing output indices

I'm currently studying about security about Monero, and I found something weird. I know that the ouputs of Monero transactions are identified by amount and indices (amount 0 for RingCT), and the ...
Ilak's user avatar
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0 votes
2 answers
721 views

Monerod constantly in sync by lagging behind 2 blocks

I have been running my own Monero Node (Monerod) for some weeks now and it worked perfectly. However, today my Node get stuck in the constant sync limbo at exactly 99.9%. It was always 2 blocks behind ...
MTP's user avatar
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2 votes
3 answers
518 views

What settings for ZFS dataset containing blockchain directory?

The ZFS file system allows the user to specify various characteristics when creating datasets, or even after their creation. For example: zfs create -o compress=lz4 -o atime=off zroot/data/monero ...
scoobybejesus's user avatar
4 votes
1 answer
529 views

What is the difference from monero-blockchain-prune-known-spent-data and monero-blockchain-prune commands?

I'm pruning my monero blockchain, but I see there are 2 commands: monero-blockchain-prune-known-spent-data monero-blockchain-prune What is the difference?
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