Questions tagged [blockchain]
A distributed ledger of all transactions both past and present, without revealing who the funds came from or went to.
227
questions
8
votes
1
answer
718
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 ...
- 34.8k
4
votes
3
answers
3k
views
Syncing Monero blockchain and get error not sure that the problem is. Error posted below
I got this error all of a sudden, this is also my third time trying to sync the blockchain from scratch.
2017-07-01 02:37:30.764 [P2P7] INFO global src/cryptonote_protocol/...
- 41
17
votes
1
answer
40k
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.
- 15k
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 ...
- 377
2
votes
1
answer
769
views
How can I delete the last X blocks from my local copy of the blockchain and retrieve them again from the network?
I think my blockchain has an error sometime within the last day. How can I wipe out a bunch of blocks and get them from the network again?
- 215
3
votes
1
answer
159
views
Transactions without outputs
When crunching blockchain data, my script tripped up on transactions without any outputs (vouts). Is this Monero's equivalent of OP_RETURN script, or am I missing something?
After looking at some ...
- 232
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?
- 1,026
2
votes
0
answers
78
views
Cryptonote one time use view key
Would be possible to have a one-time view key where it would expire after one use or a specific time has been reached? We assume that this is using the blockchain thus it cannot be modified. What I ...
- 1,026
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?
- 111
1
vote
0
answers
98
views
Monerod stuck sync? [duplicate]
Im trying to sync for about 5 hours its on this block
2017-04-08 18:15:39.304 [P2P6] INFO global src/cryptonote_protocol/cryptonote_protocol_handler.inl:293 [188.22.149.182:18080 OUT] Sync ...
- 11
7
votes
1
answer
397
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 ...
- 377
21
votes
2
answers
5k
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?
- 5,666
2
votes
1
answer
79
views
What calculation/process is being carried out regarding the syncing process
What calculation/process is being carried out within the gui, regarding the syncing process of the block chain for running a full node?
- 473
3
votes
1
answer
359
views
What is the difference between an orphaned block and a alternative block?
I see alternative blocks reorganizing the blockchain in monerod, but my mining pool's orphaned block doesnt show.
- 129
8
votes
1
answer
356
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: ...
- 2,188
7
votes
1
answer
103
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 ...
- 2,188
3
votes
2
answers
232
views
How can the network or monero community reduce the txpool size?
Does increasing hashrate help? Or does it simply rely on waiting for the blocksize median to increase?
- 129
7
votes
3
answers
216
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 ...
- 93
7
votes
1
answer
12k
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.
- 311
1
vote
1
answer
111
views
How long to fully sync with blockchain via VPS?
How long should it take to fully sync the blockchain using a VPS? My sync appears to be stuck at 334 days behind?
- 371
2
votes
1
answer
552
views
Error with transaction on the blockchain
Today I experienced the strangest error while sending moneros from one wallet to another. So thought I would share and see if anyone knows what was the cause or could shed anymore light on it.
Sent ...
- 71
3
votes
1
answer
3k
views
Understanding monerod blockchain sync status
I'm currently syncing a full-node and it is taking a long time. I a hybrid SSD/HDD, so I understand that the HDD is typically a bottleneck based on some other threads I searched, but I would like help ...
- 33
6
votes
1
answer
181
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?
- 2,188
4
votes
1
answer
346
views
Why are coinbase transactions locked for 60 blocks?
"Normal" transactions are locked for 10 blocks to prevent invalid outputs from being used in ring signatures.
Why are coinbase transactions (mined coins) locked longer? Are there additional risks ...
- 2,188
2
votes
0
answers
945
views
Difference between Monero and CoinJoin [closed]
How does Monero provide any additional anonymity for the sender over a CoinJoin transaction? I get that it provides anonymity of the receiver and the amount spent via stealth addresses and RingCT, ...
- 21
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 ...
- 5,495
5
votes
1
answer
235
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 ...
- 4,519
4
votes
1
answer
577
views
Synchronising Blocks on Wallet restore from Seed
I'm restoring a wallet from a 25 word mnemonic, I have the block chain on my Mac already... (using GUI beta1).
The GUI seems to be "synchronising blocks"... looking at my network activity it seems to ...
- 255
7
votes
1
answer
113
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 ...
- 71
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 ...
- 61
2
votes
1
answer
952
views
Understanding block reward calculation
I've read this explanation of how block rewards are calculated. But I fail to apply it in practice. Let's take block #1233057 as an example:
The base reward is 8.8005 (which matches the result of the ...
- 2,188
1
vote
1
answer
243
views
Where is the public key/output for the miner reflected on the blockchain?
One of the ways that I can understand how Monero demonstrably works, despite the opacity of the blockchain, is that the inputs used in transactions (whether mixin decoys, or the actual one-time public ...
- 5,495
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?
- 8,724
6
votes
1
answer
166
views
What are precomputed blocks?
When monerod is initializing, it says Loading precomputed blocks: 1200001.
What are precomputed blocks? Where are they loaded from?
- 516
4
votes
1
answer
365
views
Timestamp Question
The timestamp for block 129587 is 2017-01-08 22:01:42 UTC : http://moneroblocks.info/block/1219587
One block later 129588 the timestamp is 2017-01-08 21:58:37 UTC : http://moneroblocks.info/block/...
- 41
5
votes
1
answer
9k
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 ...
- 681
6
votes
2
answers
200
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 ...
- 516
4
votes
2
answers
1k
views
What is "Migrating Blockchain Version"?
I just got the recent version of bitmonero wallet winx64 v0-10-1-0. It says Migrating blockchain from DB version 0 to 1 with the total number of blocks being 1,142,544 (data.mdb is 9.67 GB).
What is ...
- 516
4
votes
1
answer
758
views
Can I run/host my own private block explorer?
I host my own node because I want my privacy level to be as high as possible. But if I want to view my transactions on the blockchain, right now I have to use a block explorer that someone else is ...
- 5,495
5
votes
1
answer
396
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?
- 3,185
3
votes
1
answer
92
views
What is block propogation in Monero network?
I hear this certain term in Monero sometimes but what does it mean? Is it related to mining maybe?
- 3,185
1
vote
1
answer
336
views
Can I use a copy of a blockchain created on Mac OS X, on an offline Ubuntu (ARMv7) box?
I created a wallet on an offline/air-gapped Ubuntu box, but my main computer is a Mac. If I want to sync the offline Ubuntu wallet to check the balance, can I use the blockchain created on my Mac?
If ...
- 889
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?
- 1,133
2
votes
1
answer
175
views
Equivalent of TX index=1 in Bitcoin
I believe that the Monero blockchain database is already the equivalent of running Bitcoin core with txindex set to 1. Is this correct?
Are there any options to increase the TX or other metadata ...
- 4,393
29
votes
4
answers
39k
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?
- 5,666
2
votes
1
answer
137
views
Is there a reason moneroblocks.info is several days behind on the blockchain?
This might not be the right place to ask this and I guess the question isn't even that important. I just became really confused when the height the site showed didn't match the height of my local copy ...
- 23
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?
- 3,327
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 ...
- 4,519
4
votes
1
answer
108
views
Why are there so many non-denominated amounts in the result of output_histogram?
As of block height 1169864, the command output_histogram from the daemon gives me the following result:
output_histogram
3 0.000929635403
3 0.003483702322
3 0.003483172627
3 14.170000000000
3 14....
- 2,475
8
votes
1
answer
313
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 ...
- 857