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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Where is the blockchain saved, in windows?

I'm kind of mystified. Bitmonerod says it's up to date. I don't see anything in my monero folder that looks like a blockchain. I also searched, using the windows file explorer, for all files bigger ...
DoNotTransfer's user avatar
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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30 votes
4 answers
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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
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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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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17 votes
1 answer
44k views

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
3k views

What happened at block 202612?

Why was this block hardcoded in the source-code? What happened with the Monero blockchain in the block 202612?
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
2 answers
1k views

How can one query the blockchain's database?

I realize that LMDB is very different from your typical SQL database, but is there a query language, or scripting language interface, that can be used to query the blockchain's database? I am aware ...
dpzz's user avatar
  • 4,539
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
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11 votes
4 answers
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Can Monero stand as a distinct cryptocurrency, or will its features be brought to Bitcoin via sidechains?

Is Monero intended to be a competitor to Bitcoin, or is the intent to develop technology that will improve Bitcoin? Is there any reason why Monero's features wouldn't just be brought to Bitcoin ...
Alexde's user avatar
  • 1,498
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
  • 113
11 votes
1 answer
4k views

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. Nodes will still need to download the entire blockchain to function. The ...
vrwim's user avatar
  • 377
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
10 votes
2 answers
10k views

How do I move the Monero blockchain files safely?

I am using the latest version of the monero GUI on Windows. The problem is that I do not have enough space on my main drive to download the full blockchain for synchronisation of my wallet. I want to ...
Fred's user avatar
  • 101
9 votes
3 answers
520 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
9 votes
2 answers
2k views

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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9 votes
1 answer
1k views

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
1 answer
13k views

Where is the Monero blockchain stored on Linux build?

I'm a Linux newbie and I don't know where monerod is storing the blockchain.
Matthew Bowler'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
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
8 votes
1 answer
756 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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8 votes
1 answer
317 views

Is there a way to make a public transaction?

Let says I want to send 1 XMR to Alice, and I want to prove to EVERYONE that I sent that 1 XMR to Alice without giving them a view-key or anything. Is this possible, and where could someone view the ...
UsernameVF's user avatar
8 votes
2 answers
600 views

Is there a way to see the total supply of coins?

I ask because if there is anonymous transactions how is one (without the Private Key) going to see an address?
Idenitifiication 's user avatar
8 votes
1 answer
487 views

Is there any message in Monero's genesis block like there is in Bitcoin's?

As the title says, what data was used to seed Monero's genesis block?
ferretinjapan's user avatar
8 votes
1 answer
363 views

How do I know I'm on the main blockchain?

The new version of the daemon has the "alt_chain_info" command. The output looks like: 5 alternate chains found: 1 blocks long, from height 1264997 (5502 deep), diff 1746032035727893: ...
assylias's user avatar
  • 2,208
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
7 votes
3 answers
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
7 votes
1 answer
409 views

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

So I have 5 monero, but if nobody else can see my balance, how can I prove that these coins are in my posession, and that they have not been spent yet. I just fail to see how Monero can ensure that ...
vrwim's user avatar
  • 377
7 votes
1 answer
2k views

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
  • 4,539
7 votes
2 answers
1k views

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
  • 111
7 votes
3 answers
217 views

What exactly is a coin?

maybe this is a stupid question but hey, posting will hurt nobody so I'll give it a shot. :) I'm wondering, what exactly a Monero is, speaking data wise. According to the Bitcoin Whitepaper, a ...
boinkflip'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
167 views

What are precomputed blocks?

When monerod is initializing, it says Loading precomputed blocks: 1200001. What are precomputed blocks? Where are they loaded from?
iyrin's user avatar
  • 526
7 votes
1 answer
263 views

Do checkpoints make initial blockchain sync faster?

Do the checkpoint hashes in checkpoints.cpp make the syncing go faster? Why or why not?
CQM's user avatar
  • 603
7 votes
1 answer
105 views

Miner publishes a block to the network with a lag

I just noticed that a pool has "retained" a new block for quite a long time. See snapshot below where the block was found 3 minutes ago but still not pushed to the network (my own node was not seeing ...
assylias's user avatar
  • 2,208
7 votes
1 answer
114 views

Is there a tool that tells me if my transfer has been used by others in a ring signature?

Is there a tool that, given a tx hash and/or a specific output, can search through the blockchain to see if it's been used as input in other transfers? This would preferably not be a web service but ...
user1161's user avatar
6 votes
2 answers
1k views

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
6 votes
1 answer
281 views

Why are empty blocks not all the same size?

Why are empty blocks not all the same size? On Monero Blocks I see a different size for blocks with zero transactions. 1157855 block size 210 1157856 block size 254
fatdoor's user avatar
  • 589
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
6 votes
1 answer
186 views

Longest orphaned chain

In the history of Monero, what was the longest chain of orphaned blocks? Can I easily find the answer by inspecting the blockchain?
assylias's user avatar
  • 2,208
6 votes
1 answer
2k views

With the Monero Wallet GUI is it suppose to start synchronizing every time you open it even after it completed synchronizing the 1st time i opened it?

Even though my question(according to stackexchange) appears subjective and is likely to be closed, Im still asking it because its driving me crazy and i just want someone to help me PLEASE. When I ...
Jason's user avatar
  • 61
6 votes
0 answers
2k views

Why does blockchain sync keep getting stuck? [closed]

Using Windows 7 64 and GUI wallet. Have tried to sync the blockchain from scratch 4 times by deleting the data.md file. Each time the sync process gets stuck on a particular block once, always within ...
tea's user avatar
  • 61
5 votes
2 answers
3k 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?
Patoshi パトシ's user avatar
5 votes
2 answers
162 views

Should we synchronize blockchain from scratch after every scheduled hard fork?

Should we synchronize blockchain from scratch after every scheduled hardfork or just update the binaries and synchronizing blockchain from where it was synced with pre hardfork binaries?
Febo's user avatar
  • 361
5 votes
1 answer
816 views

Its 2017-09 the monero blockchain is 21 GB, what proposed ways are there to reduce this size?

The monero blockchain is 21GB as of 2017-09 on version .11 What ways are there to reduce this block size down the line? Wasn't RingCT suppose to make things smaller moving forward? Is it possible ...
Patoshi パトシ's user avatar
5 votes
1 answer
467 views

Message "Ours and foreign blockchain have only genesis block in common... o.O"

When I'm syncing the blockchain for the fist time, I have this error message 8 times 2016-Sep-26 19:58:50.608535 [P2P3]ERROR /tmp/monero/src/monero-0.10.0/src/cryptonote_core/blockchain.cpp:1835 Ours ...
Clement J.'s user avatar
  • 3,339
5 votes
1 answer
1k views

Possible lengths of Monero addresses?

I'm doing crude client-side verification of a form that includes an input for a Monero wallet. What are the possible lengths of an address? Are 106 and 95 the only possible lengths?
user6769219's user avatar

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