Questions tagged [synchronization]

This tag should be used for questions about synchronizing a Bitcoin client. This is the process of bringing a Bitcoin client up to date with the blockchain.

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15 views

how long to resync with txindex on raspberry pi 4 with USB3 HDD

I already have a 1.00 node. But now Im considering to have txindex too for LND. Are there any guesses for how long will the resync take on raspberry pi 4 with USB3 HDD?
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1answer
254 views

Is there a faster way to download IBD for bitcoin core?

I am trying to setup a node using bitcoin core https://bitcoin.org/en/bitcoin-core/ but it is taking ages to download. Running for past 2 days and downloaded only 15 % . I have a decent internet ...
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29 views

Power outage during Bitcoin Core initial synchronization

I had a power outage when I was half way through my Bitcoin Core initial synchronization. Is there a way to pick up where it left off or do I need to start over?
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48 views

What happens if a peer doesn't respond to "getheaders" or "getdata" on time?

Suppose a node receives the same "inv" message from many peers. Will the node send "getheaders" requests to all the peers or only one of them? Does the node keep a timer for ...
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30 views

Do nodes maintain a download window after the initial syncing?

I was going through the Bitcoin P2P guide. https://developer.bitcoin.org/devguide/p2p_network.html It says that the nodes maintain a 1024-block download window during the initial syncing. However, at ...
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23 views

If I plug a node into another computer does it have to reindex?

imagine you have a Bitcoin Core node synced 100% working fine, its installed in a portable SSD on your laptop. If you want to use this SSD on your desktop, will it boot normally or will it go throught ...
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1answer
53 views

Missing Transaction on older Bither wallet on older computer

Please note I am not that technically savvy nor know that much about cryptocurrency. I am helping out a friend that (for disability reasons) cannot ask himself. My friend purchased and has bitcoin he ...
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32 views

Can you prune blockchain without redownloading?

I've downloaded the whole blockchain now I want to run a pruned node on another device. But if I klick on prune block storage in bitcoin core, it tells me that reverting this setting requres re-...
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29 views

Making regtest's generatetoaddress work with blocksonly=1

I'm setting up a regtest scenario in which I want to send transactions which should be included in new blocks created via the generatetoaddress RPC call. However, I want to disable transaction ...
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13 views

How to sync AirGap Vault with its Wallet

How long does it take to sync AirGap Vault/Wallet together and does the syncing process require internet? And is it possible to sync Airgap Vault with electrum wallet?
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48 views

Do peers advertise their chain work?

If yes, is this how a node decides that the peer has the best chain for headers-first download?
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79 views

Where does a full node get the blockchain from for Initial Block Download?

I understand that a full node needs to do an IBD before being able to verify transactions. So, it downloads the ledger up to now, which is known as Initial Block Download. But what I don't understand/...
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73 views

Can I find the address of my Bitcoin in the debug.log file?

I cannot download the entire block chain (I’ve tried four times now and failed) so I can’t replace my encrypted old wallet.dat file into the blockchain and do the rescan to check my coin balance. My ...
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78 views

Can a full node understand the transactions it downloads from the Bitcoin network?

I understand a full node downloads and validates the entire transaction history. Can a full node read and understand these downloaded transactions, or is it just just keeping a copy of encoded ...
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190 views

Raspiblitz slow sync performance

I'm syncing my raspberry pi 4 model B, 4GB and after 4 days I'm less than 50% synced. It seems as though there is something wrong with bitcoind as there are some weird symptoms going on. The pi is ...
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1answer
137 views

No new UpdateTip. Just "Pre-allocating up to position ..."

I'm IBD'ing a new testnet node 0.21.0 Why are there long periods of no UpdateTip messages? I have 10 connected peers. Excerpt starting at 00:13: 2021-04-05T00:13:17Z UpdateTip: new best=...
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104 views

Is there some kind of USB antenna I can buy to be able to use Bitcoin even when there is no Internet?

Let's say they cut the Internet tomorrow. I will still have my private keys on my offline computer, but I won't be able to sync the blockchain (as won't anyone else) nor would i be able to make any ...
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56 views

Bitcoin Core resume

iam downloading the 350GB Core database via slow network. iam not shure, if an correct resume occurs, if i need to breask the transmission. my question: is there any risk for inconsistence of bitcoin ...
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46 views

Multisig synchronization

I understand what the multisig wallets are but I need help understanding what exactly this script does: https://gist.github.com/gavinandresen/3882537 If I understand correctly, bitcoinds are bitcoin ...
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bitcoin-qt 0.21.0 in win10 keep hight disk I/O, and GUI not respond

My OS is win10, and I used to use bitcoin-qt 0.13.0, it was fine but I found it syncs very slow now, so I upgraded bitcoin-qt to 0.21.0. I feel 0.21.0 syncs much faster, but it always keep high disk ...
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23 views

Automatic synchronization on multiple devices, but only for the selected wallet

I need a solution to improve this very annoying procedure. I utilize CoinStats to synchronize my crypto and I do it manually. Since I've incorporated into my app three more wallets, one for my mom, ...
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1answer
1k views

Is there a way to only sync up to a certain block?

I am planning on doing some transaction analysis on the blockchain, however, I only want to do it on a small part of the blockchain first and then run it on the full blockchain later on. I have ...
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1answer
152 views

Deleting Electrum wallet and setting up new one

I set up an Electrum wallet before I learnt that you should verify the signature. While I went straight to the electrum.org website to download it, I would still like to be secure, just in case. So I ...
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2answers
353 views

Does running a pruned node support the syncing of other nodes in the network?

I decided to prune my Bitcoin core node to 25 GB. With the blocks that the node has in its data directory (the ones that were not deleted), does such a node support the syncing of other nodes in the ...
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90 views

Am I seriously going to have to keep this clunky old infernal machine running for weeks upon weeks to sync the blockchain? [duplicate]

Yesterday, I dug up my old computer, set it up physically, installed Linux Mint with full disk encryption, installed Bitcoin Core through its software manager, started it, immediately selected "...
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150 views

Why would Bitcoin Core freeze my computer when syncing? And is it supposed to take this long?

24 hours ago, I finally bit the bullet and dug up my old computer, set it up physically, installed Linux Mint (with full disk encryption), installed Bitcoin Core through its software manager, started ...
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33 views

To what extent is the actual downloading of blockchain data what slows down a "fresh sync"? [duplicate]

I've just sat an old computer with fresh Linux Mint and Bitcoin Core installed to sync from scratch. Since its HDD is 250 GB, I had to enable "pruned mode" since the blockchain is currently ...
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4answers
169 views

How isn't blockchain fundamentally broken?

This question is a good 3 to 5 years late on the crypto trend but nevertheless I'm still having trouble to understand. The chain works by verifying every previous block, right? How does this not ...
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31 views

Bitcoin QT wallet.dat file location? [duplicate]

It's been since 2013 when i was mining bitcoin that i have used and synchronized this wallet. I've tried a few times several years ago but it literally takes days, if not weeks now to synchronize, AND,...
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62 views

Can I interrupt the initial blockchain download without losing progress?

I just installed Bitcoin Core through brew on my mac. The blockchain is now downloading but it's slowing down, so I would like to restart it. Can I abort the process and restart it and will it pick up ...
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2answers
1k views

Why is it bad to download the full chain from a third party with Bitcoin Core?

I know Bitcoin Core downloads and processes the full chain much quicker now than it used to but what exactly is so bad about downloading a compressed blocks, chainstate and database folder from a ...
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2answers
221 views

Very slow sync on low end PC - what to upgrade?

[Hi, I have to re-ask this question because I cannot recover my account from the last one. Sorry about that.] I am a newbie to bitcoin. I am trying to sync a full node on my low end PC: 2g RAM, dual-...
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59 views

Will Upgrading Ram on Low End PC Make Core Sync faster?

I am a newbie to bitcoin. I am trying to sync a full node on my low end PC: 2g RAM, dual-core 2ghz, 250 gb regular HDD. It is in pruned mode. The initial 15% synced in a few days but now the process ...
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1answer
118 views

How to improve bitcoin-qt when downloading blockchain? (very technical, dev views appreciated)

GitHub suggested discussing here before bothering developers with an issue. So be it! :) I'm running Bitcoin Core Version v0.20.1 and Linux Mint 18.3 on crappy old hardware. Pruning blockchain to 2 G ...
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Initial blockchain sync stuck on block 237158

Stuck on block 237158. Rebooting doesn't work. Do I need to start from scratch? admin@raspberry2bit:~ $ sudo tail -f /mnt/ext/bitcoin/debug.log 2020-10-26T08:48:30Z Loading addresses from DNS seed ...
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56 views

Blocks seem to store only txIDs, where does the transaction data come from for IBD?

I know that blocks store transactions. After looking into a block, I can see that it only stores txIDs. Question 1 - Where are actual transaction objects stored? If you tell me that it's stored in a ...
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2answers
656 views

Download blocks in blk00000.dat format from a specific period

For study purposes, I would like to download blocks from a specific period, i.e. January 2017 - June 2017, in blk.dat format (blk00000.dat, blk*.dat). I downloaded blockchain.core but it makes me ...
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1answer
61 views

How can I know that a full node has finished the initial synchronization process?

I run a full bitcoin node. I launched it several days ago and it has consumed around 300 GB of traffic already which implies that it is about to finish the initial syncronization process. Except for ...
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3answers
47 views

Change IBD Location Prior to Download

I'd like to run Bitcoin Core but my laptop can't handle the load. I have an external drive with enough space, but I'm unsure if/how to change the file destination upon opening the program. Is this ...
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1answer
81 views

Wallet download issues, cannot restore backup

greetings everybody ..... I hope everybody is safe. I have a problem recovering my wallet, earlier this year there was a link on the website that make me able to access my wallet and recover the ...
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1answer
58 views

Should a node follow the longest chain, or the chain with most work while syncing?

I'm reading mixed things online - some saying to follow the longest chain, and some say to follow the chain with the most work. But I'm not convinced of the former. If the node follows the longest ...
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1answer
153 views

The Mystery: I've mined some BTCs with Bitcoin Core 0.9.0, however the system no longer synchronizes and in the blockchain the balance is zero

I got some BTCs using a Bitcoin Core 9 version beta, from August to December 2019, they are listed in my history as "generated" and with several confirmations with one, the balance appears ...
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1answer
62 views

How to detect that full node is in sync (using jsonrpc)?

I have full bitcoin node available through jsonrpc interface. How my app can detect if this node is in sync with the network?
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1answer
768 views

Funds received still shows pending and unavailable until confirmed in Exodus. Should I be concerned?

I have a transaction I received in my account that has been marked as pending for the last 12 hours (now 16) and counting. The BTC and US equivalent shows in my wallet (Exodus) but the wallet has it ...
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0answers
312 views

Pruning Blockstore has been running for days

After activating the core (Testnet - Pruned) with the command bitcoin-qt i received the following error: Corrupt Block Database I restarted the synchronization always using the Pruned mode. The core ...
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2answers
73 views

Can an unsynchronized node create a valid transaction?

I'm trying to understand how bitcoin transactions work. From what I understand, in the Bitcoin network nodes hold different versions of the Blockchain and after some time the different chains start ...
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1answer
224 views

Missing transaction in newly installed Bither wallet

On bitcoin.org I learned about the Bither wallet. I installed it, created an HD account, and replenished the wallet sending to the address 19QpMgv2N2hSJNq6Nrkg1rzJ1Fc9s2Pjbf. As can be seen, the ...
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0answers
102 views

Bitcoin Core wallet fails to load and requires reindex after I already did it

My Bitcoin Core is synchronized. But I can't open a wallet, it says that I might need a reindex. Though I already did it. Also I can't do dumpprivkey because it says that no wallet is loaded. How can ...
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1answer
288 views

Downloading the pruned blockchain file directly from external source

Using the bitcoin client to have a pruned version of the blockchain can take a lot of time, I was wondering what would be the drawback to simply download an already pruned bitcoin blockchain file from ...
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1answer
65 views

Why does bitcoin sync inventories?

I read the bitcoin docs describing how btc syncs. During IBD it gets the inventories up to the tip with getblock. Why does it not skip this step and get the blocks, generating the inventories as it ...

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