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

During the last few weeks a common, reoccurring, question seems to be how to get one's blockchain "unstuck". This guide will, hopefully, provide some assistance in doing so.
dEBRUYNE's user avatar
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16 votes
2 answers
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What happened at block 202612?

Why was this block hardcoded in the source-code? What happened with the Monero blockchain in the block 202612?
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21 votes
2 answers
6k views

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

What is in the header? How is the header made? What information about the transactions is present? What is prunable? What part of the block is used for the PoW?
Ginger Ale's user avatar
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31 votes
4 answers
42k views

What is the fastest way to synchronize the daemon?

Running the daemon without any modifications can take a long time to synchronize. Are there any faster options for synchronizing the daemon with the network?
Ginger Ale's user avatar
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27 votes
3 answers
5k views

What are Fluffy Blocks?

I heard the term thrown around here and on Reddit, but I haven't found its definition anywhere. Could someone please clarify?
user141's user avatar
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5 votes
1 answer
10k views

How to synchronize the GUI wallet using the blockchain bootstrap

I'm having trouble trying to sync the GUI wallet with the blockchain. I'm trying to use an old 2008 Macbook which I had lying around, with OS X El Capitan (HDD, 8gb RAM, 200gb free storage). I've ...
StrawbsUK's user avatar
  • 701
11 votes
1 answer
14k views

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

A transaction I made a few hours ago is stuck as "pending", after sending via monero-wallet-cli. The transaction has not been picked up in a block yet. I found this comment on Reddit by /u/...
naleves's user avatar
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9 votes
1 answer
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What kind of pruning techniques does AEON use?

AEON has a pruning branch. What kind of pruning is it? Is it just like Bitcoin pruning, or is there more to it?
Christopher King's user avatar
8 votes
2 answers
4k views

Blockchain properties: what are Height and Difficulty?

What are Height and Difficulty properties of Monero's blockchain?
Alessandro Da Rugna's user avatar
8 votes
1 answer
753 views

Is the Monero blockchain database portable between 32 and 64 bit architectures, and little/big endian architectures?

Monero uses LMDB for its database. Various data is saved in this database, including integers, such as the difficulty for a given block. LMDB is type agnostic, so does not any particular processing on ...
user36303's user avatar
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7 votes
2 answers
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Monero Height at a standstill

My Height seems to be stuck here 335459/335459 (100.0%) on mainnet But when I check the current height online it's 1289240 Could someone help me?
dcrew's user avatar
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7 votes
1 answer
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Are the LMDB files cross-platform compatible?

I would like to know if the LMDB files are cross-platform compatible, more specifically between macOS and Linux. I am trying to import a raw blockchain (that I exported yesterday on macOS) onto a ...
dpzz's user avatar
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9 votes
2 answers
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How do I prove that a payment has been sent to a particular address?

If I pay someone, and they then claim that the payment has not been received, how can I prove that the payment was in fact sent?
Alexde's user avatar
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6 votes
2 answers
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Can I set up the GUI or daemon to use a non-standard blockchain location in Windows?

In Windows, it's comfortable to double-click the link/icon to a program (as opposed to using the command line). The problem is that the default links/icons for the GUI or daemon (monerod) don't let ...
scoobybejesus's user avatar
4 votes
2 answers
2k views

Is the raw Monero blockchain file different for Linux, Windows, or Mac?

Is the raw Monero blockchain file different for Linux, Windows, or Mac? Where can I download it?
tryinghard's user avatar
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3 votes
1 answer
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RPC method to translate key_offsets

This SE answer explains the "key_offsets". Is there any RPC call to translate theses offsets to their matching outputs ?
Moroccan Engineer's user avatar
3 votes
1 answer
1k views

How to backup the blockchain file?

How can I periodically backup the blockchain file, without copying the entire file (just the new data that was added since the last backup)? I tried copying only the amount of bytes by which the ...
Jona's user avatar
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2 votes
1 answer
6k views

Download Monero Blockchain data and the official client

Is there a site where I can just download the entire monero blockchain instead of waiting for it to sync? And where do I get the official client?
Patoshi パトシ's user avatar
0 votes
1 answer
344 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
30 votes
4 answers
3k views

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

We know that because of the way Monero's privacy works, transactions are larger than a Bitcoin one, but how much larger on average are they compared to Bitcoin transactions? How will this affect the ...
ferretinjapan's user avatar
16 votes
3 answers
2k views

Looking for an easy explanation about kovri

I still don't get what kovri actually is. Can anyone provide an easy explanation? I looked at YouTube for videos, but couldn't find any. Also other links didn't help. Does anyone know a picture ...
PowerFlower's user avatar
13 votes
6 answers
9k views

Blockchain size on hard drive?

What is the current blockchain size in gigabytes and is there a service that regularly reports this statistic?
Adriaan Joubert's user avatar
12 votes
2 answers
6k views

How do I save the Monero blockchain to another hard drive?

I have a small SSD as my windows 7 C: drive. How can I transfer and save the Monero blockchain to another hard drive on my computer in order to save space?
Romanero's user avatar
  • 511
12 votes
1 answer
253 views

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

I've heard estimates ranging from 5-10 times bigger, but is it possible to come up with a more precise answer? By how much will this figure change after RingCT is implemented? What other factors might ...
Alexde's user avatar
  • 1,498
11 votes
1 answer
756 views

Is it viable to attack Monero by artificially bloating blocks and make it harder to run a full node due to the increased blockchain burden?

A lot of small block proponents defend their stance by reasoning that an artificial cap is necessary to prevent spamming, and thus bloating the blockchain. How effective is Monero's mechanisms at ...
ferretinjapan's user avatar
9 votes
3 answers
518 views

Are criticisms of Monero's blockchain bloat substantiated? [closed]

One of the more seemingly legitimate criticisms of Monero is that the blockchain is susceptible to bloat due to its ring signatures. Are these criticisms valid, or do other coins have similar ...
cardboardoranges's user avatar
8 votes
1 answer
3k views

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

When I use the command ./monero-blockchain-import --verify 0 --input-file ./blockchain.raw it says "Failed to parse arguments: unrecognised option '--verify'".
Lucy Tao's user avatar
7 votes
1 answer
615 views

How is the block hash encoded?

How to compute block difficulty from a hash of that block? In Bitcoin, I can see that block hash starts with a lot of zeros, but in Monero I don't understand how uniqueness of new block in represented ...
vurg888's user avatar
  • 73
7 votes
1 answer
9k views

What are orphaned blocks?

I've heard the term "orphaned blocks" being tossed around here and on Reddit. Can someone please explain what orphaned blocks are and what happens to them?
sgp's user avatar
  • 8,806
6 votes
2 answers
205 views

How many total days are on the ledger?

Is there a tool or a source that tells how many total days are currently on the ledger? I know that monerod tells how many days behind you are on the ledger, but is there an easy way to look up the ...
iyrin's user avatar
  • 526
5 votes
1 answer
244 views

I have the impression blockchain reorgs are more prevalent on testnet?

They also seem more significant if they happen, e.g. I just see REORGANIZE on height: 839127 of 839203 in the log file, which is quite a number of blocks. Can anyone comment whether these observations ...
dpzz's user avatar
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5 votes
1 answer
414 views

As a miner how would I put data in the 'extra' field?

How would I be able to put data in the extra field for say a nonce or whatever?
samwellj's user avatar
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4 votes
2 answers
603 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 ...
Patoshi パトシ's user avatar
3 votes
1 answer
5k views

Monero wallet doesn't connect to local daemon

I have a Monero daemon running on a Raspberry Pi connected to my LAN and it worked fine for sometimes, but lately, I'm unable to connect wallet from another PC to it. When the issue has happened for ...
cialu's user avatar
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2 votes
1 answer
3k views

Monero Fork (Genesis Block)

I'm performing a Monero (XMR) fork, but I'm not sure how to generate a genesis block. Could you help me? Investigate a little and talk about a print parameter in the deamon, but that parameter no ...
Hugo Teijiz's user avatar
2 votes
1 answer
6k views

Monero block reward schedule

Does the Monero block reward just decrease and I don't mean the transaction fee. Are there any specific dates of this when it will happen?
Gundamlancer's user avatar
  • 1,026
0 votes
0 answers
12 views

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
0 votes
0 answers
75 views

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
0 votes
1 answer
391 views

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
0 votes
1 answer
42 views

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
0 votes
1 answer
93 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? ...
Mohammed niyas's user avatar