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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1answer
30 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 ...
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28 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 ...
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64 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 ...
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33 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?
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35 views

Monero Fork - Creating a new blockchain causes daemon to freeze up

I am trying to create a simple Monero fork (identical in every way but on a different blockchain) I have two running instances of monerod using different ports. Based on the log info from both, I can ...
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1answer
40 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 ...
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2answers
227 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 ...
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1answer
64 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 ...
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1answer
39 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 ...
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2answers
237 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 ...
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21 views

Genesis block version

As a student i'm trying to start a new chain with v14 for checking what benefits in term of blockchain size CLSAG signatures offers. Except of editing hardfork file and inserting new genesis with v14 ...
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44 views

Daemon not syncing on tails current release monero gui [duplicate]

monero seems to be not syncing on tails initial startup any ideas? [10/21/20 7:01 AM] 2020-10-21 I Monero 'Oxygen Orion' (v0.17.1.1-release) Height: 1, target: 1 (100%) Downloading at 0 kB/s Next ...
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22 views

How to recover a damaged blockchain? [duplicate]

Log: [P2P1] ERROR blockchain src/cryptonote_core/blockchain.cpp:4317 Error adding block with hash: <(hash)> to blockchain, what = Error adding spent key image to db transaction: ...
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51 views

Problème de connexion a monero

Bonjour, Jai vraiment besoin d'aide hier jai effectué un achat de 150€ de bitcoin que jai transféré sur l'appli monero..... Seulement je n'arrive plus a me connecter à mon compte, jai donc voulu ...
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2answers
152 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 ...
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1answer
188 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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1answer
41 views

Can I quickly move my node from my Windows box to a virtualbox Ubuntu guest by making the blockchain path a shared folder?

That's. That's pretty much it. I'm just wondering if I can do this and whether it'll work properly. Just shut down the Ubuntu guest, go into the VBox manager, make the folder with the extant ...
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2answers
53 views

What is long-term consequence of “lost” coins?

I wonder what is the long term consequences for a digital currency with an obfuscated blockchain. Suppose some billionaire buys a huge amount of Monero coins, then dies and nobody can recover his ...
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716 views

Where can I download the pruned Monero blockchain that is 25+ GB instead of the full blockchain

I'm looking to download the full pruned blockchain for Monero instead of syncing it and then pruning it. Where can I find this pruned monero blockchain file?
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1answer
101 views

Where are the input keys stored for a transaction (understanding vin field)

I am currently implementing the heuristic 1 algorithm from this paper https://eprint.iacr.org/2017/338.pdf for a university project. (pretty interesting btw worth reading :) ). My problem currently ...
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1answer
93 views

Where can one download the entire Oxen (Monero Fork) blockchain without syncing from scratch?

I don't want to sync my oxen network node by waiting for it to connect to peers. Is there a way to just download the entire blockchain directly from a single file?
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2answers
189 views

Can I copy my pruned blockchain .bitmonero folder to another computer and start syncing?

After pruning the monero blockchain, can I copy this pruned blockchain from the .bitmonero folder to another computer and just start syncing from there? What are some disadvantages of pruning the ...
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1answer
146 views

transaction verification failed on monero-blockchain-import

I am new to monero. I'm running version: Monero 'Boron Butterfly' (v0.14.0.2-release) on Arch Linux I started with the following steps: wget -c --progress=bar https://downloads.getmonero.org/...
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3answers
396 views

How can I use Monero RPC via Python

As documented in https://ww.getmonero.org/resources/developer-guides/daemon-rpc.html and https://ww.getmonero.org/resources/developer-guides/wallet-rpc.html, Monero can be used programmatically using ...
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1answer
248 views

How can I create a million blocks in regtest or testnet?

Can anyone please tell me how to create a million blocks in regtest or testnet mode? Is there a way other than to start mining with the smallest difficulty?
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43 views

Stable coin on Tari?

Is it possible to create stable coin like DAI (Ethereum netowrk) on Tari layer? Stable coin on anonymous blockchain would be game changer!
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1answer
104 views

Are there any neat tricks to enable SPV like functionality for Monero?

I think one of the biggest things holding Monero back from a user experience standpoint is the need for every user to download a large subset of information each time they want to check their balance. ...
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1answer
74 views

Monero fork: block creation time fluctuation

I am running a Monero fork(v7) for the past 4 days. I have set the block creation time as 2 minutes but sometimes the blockchain takes more than 30 minutes to create a block. Is this normal behavior? ...
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1answer
57 views

At what dates did the Monero blockchain version update?

I want to download the v1 and v2 versions of the Monero blockchain for experimental purposes, but since I don't know when the blockchain upgraded from v1 -> v2 and v2 -> v3, I don't know which node ...
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1answer
50 views

Where and how to start to understand Monero?

I'm a newbie and I would like to know more about Monero and the technology behind it. What is a good starting point to learn more about Monero? Website, wikis, books? Thank you so much for answers.
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69 views

Monero GUI is unable to finish the synchronization

The Monero GUI (updated) suddenly stopped synching and stuck on the last 30 blocks or so. Here the log: https://paste.fedoraproject.org/paste/uguNJ3qVqHmdvFvpc-vyOQ What can I do to solve this ...
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1answer
70 views

What is the block height from which RingCT was implemented?

Can we know the block height from which the ring signatures were implemented. Because i read few blocks which are pre-ring signature blocks where I see there are ring members repeating for a single ...
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1answer
37 views

Can an output public key appear more than once in the blockchain

The output public key 9b2e4c0281c0b02e7c53291a94d1d0cbff8883f8024f5142ee494ffbbd088071 appears in the the following blocks: https://moneroblocks.info/search/...
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134 views

Go or Rust library to use Monero

Is there any library for Go (Golang) or Rust that I can use in order to generate the key pair, manually build a transaction, sign it and broadcast it to a remote node? I searched GitHub and either ...
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1answer
81 views

How does the miner know the public key for the signature in the block?

When a block is being processed by the miner he has to verify the signature by using the public key. How does the miner know about this public key? Is it included in the block data?
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1answer
127 views

Global index of output

Can anyone please tell me, is there a way to find out the future global index of the output that is currently in the tx pool?
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38 views

Questions about tx_description field in URI

In the Monero URI, is the tx_description stored on the blockchain? If so, is it encrypted? What is the maximum length of this field?
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1answer
104 views

We are quite new into Cryptonote technology! We are looking for a web wallet!

https://github.com/mybtcfx/4xbitcoin This is our coin based on CryptoNote. We have made our coin and started mining as well. We have also worked onto our block explorer !! Now ae are looking toward ...
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1answer
69 views

When does validation of blocks occur

At what point does a miner validate blocks shared and created by other miners on the blockchain?
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1answer
1k views

Monero blockchain size requirements

I am thinking of running a local node, and I was wondering how much space is needed. I know that the current blockchain size is less than 50G. I heard that implementing bulletproofs will ...
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2answers
88 views

Is there a way to make a public message where anyone can see on the monero blockchain using payment ID?

I'm assuming payment IDs are viewable publicly. Is there a way to encode an ASCII message in the payment ID and make it viewable publicly on the blockchain?
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1answer
339 views

How to check balance of monero paper wallet from nodejs?

I'm taking address and viewkey as input then want to return its balance in my expressjs project. How to call monero blockchain from nodejs for checking balance of any paper wallet?
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1answer
33 views

What do I need to change/add in order to add a field to the block struct?

I'm trying to add a field to the block struct, and want it to be serialized just like the miner_tx and the tx_hashes (like FIELD(new_field)), because the block parsing is failing for me with my code ("...
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2answers
21 views

Do all blocks that end up in the main chain pass through handle_block_to_main_chain at some point?

Do all blocks that end up in the main chain pass through handle_block_to_main_chain at some point (even during reorgs?)
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4answers
157 views

How can I check if a transaction is mined into the blockchain?

How can I check if a transaction is mined into the blockchain ? How much time does it take for this if the transaction is less then 1000$ ?
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1answer
128 views

How to buy monero for cash?

How to buy monero for cash ? I meet with the seller, then give him cash and send him my wallet address using some messenger. Then he using a laptop or smartphone send xmr to my address. How much time ...
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0answers
2k views

Torsocks server failure when running monerod with Tor on Tails

I'm trying to run the Monero daemon (monerod) v. 0.12.2.0 with Tor on Tails 3.7.1. I'm doing exactly what is written here: Medium - Sheep’s Noob guide to Monero GUI in Tails 3.2. Basically: Download ...
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1answer
269 views

Monero blockchain explorer compilation not working ubuntu 16.04

Hi I am working on monero blockchain explorer, Trying to work with this git repo. I have tried too many times but unfortunately couldn't get success yet. Right now I am facing this error. CMake ...
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1answer
79 views

Monerod finished syncing but now never catches up in GUI wallet, monerod still syncing

I'm using Windows 7, 64 bit, on a crummy burner laptop. So monerod finally finished syncing last week and I followed advice here and opened the GUI wallet, it was all syncing together as it should but ...
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1answer
153 views

Why are there transactions in the Mempool that are invalid or over 50 hours old?

Checking xmrchain.net I noticed some very old transactions in the mempool. The oldest is over 70 hours old. It has a ringsize of 5 - how is that even possible? Are transactions not validated before ...