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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1answer
82 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
124 views

Old Bit Coin Wallet Failing to Pass 180 Weeks

I have an old laptop that I have bitcoin wallet on. I left the computer alone since early 2015 and when I try to sync the bitcoin wallet, the wallet gets stuck on 180 weeks. the bitcoin wallet sync ...
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3answers
342 views

What should I do to increase bitcoind sync speed?

My VPS has 2gb RAM and CPU core is 1 and 1 TB HDD storage. The sync speed is very slow. Currently it has about 700 MB free RAM. bitcoind is taking about 66% of the 2GB ram. Should I add 1GB more RAM ...
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1answer
136 views

Transfer incoming funds from Bitcoin Core to another wallet before blockchain sync is completed

This is my situation: I have a Bitcoin-QT wallet on my Mac (Qt version 4.7.4.- yes I know its very old). only recently I've been working out how to operate and exchange bitcoins. well to cut a long ...
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1answer
71 views

Security concerns when downloading the block chain from a 3rd party source?

It takes very long until bitcoin-core has downloaded the whole block chain. So I decided to download the block chain files via a bittorrent published by this website: http://www.getbitcoinblockchain....
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1answer
158 views

How can I make Zap synchronize with the Bitcoin network?

I'm using the Mac operating system. I downloaded Lightning App and Zap from Github. The wallet can not be synchronized with the network, how can I synchronize it and can I do it without having to ...
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1answer
3k views

Bitcoind Node crashes after using -dbcache option

I've been trying to speed up my node sync by increasing the dbcache. However my node tends to crash overnight. My system is running ubuntu 18.04, 4GM of ram bitcoin core v0.18. I've tried bitcoind -...
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2answers
2k views

Bitcoin Core frozen trying to sync and/or connecting to peers

I downloaded Bitcoin Core directly to my laptop and sent BTC to what i believe is my wallet. The BTC is no longer in my senders wallet and I do not see it in my bitcoin core wallet. It was working ...
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26 views

Why does Electrum never complete synchronization with a server?

How do I diagnose why electrum never finishes synchronizing? I've tried selecting networks individually without success. Can I ping a server to confirm connectivity?
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1answer
57 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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2answers
258 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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1answer
884 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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1answer
141 views

Bcoin initial blockchain sync progress isn't saved

I'm using bcoin and it's class FullNode to run a full Bitcoin Node. Here's the configuration: const node = new bcoin.FullNode({ prefix: '/mnt/d/bcoin', network: 'testnet', ...
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2answers
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How can I -abort ./bitcoind -reindex-chainstate?

I made files re-accessible. Now we could return to a later, already synchronized state with the files. I tried to put ./bitcoind -reindex-chainstate=0, also in a bitcoin.conf, also directly calling ...
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3answers
10k views

My wallet hasn't synchronized, can I make a transfer?

My wallet hasn't synchronized, can I make a transfer? I'm assuming that the transaction will not come up on my wallet but im guessing it would come up on the person I send too?
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1answer
146 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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4answers
92 views

How are funds verified?

I understand that transactions go into mempool and a miner "verifies" the transactions such as ensuring the user has the appropriate funds and correct signature. Specifically, how are ...
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1answer
70 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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2answers
52 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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2answers
426 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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1answer
342 views

how can I recover my private key from my passphrase and password

I decided recently to get some BTC and bitcoin core was the storage solution I decided on. I downloaded the software, and all seemed good. No messages about storage or such. Around a month later I ...
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28 views

BTC synchronization in Bitcore

I had kept some BTC for for synchronization in BITCORE but now I need money, so want to SELL my BTC but the process of synchronization is still going on..... In that case can I stop the process of ...
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1answer
675 views

Cannot synchronize with Bitcoin in testnet mode

I downloaded Bitcoin-QT for Windows 7 into: MYUSERNAME/Downloads/bitcoin-0.8.6-win32/bitcoin-0.8.6-win32 I want to run Bitcoin in testnet mode, so I created bitcoin.conf with only the following ...
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4answers
2k views

Has the bitcoin network ever been "down"?

I'd be interested to know if the bitcoin network has ever been down. By "down" I mean that a client would not be able to synchronize with the network to obtain data like the txs in the mempool or ...
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0answers
62 views

What work is needed to close a block from 2013

Please could you tell me what work is needed to close a block?,also is it possible to to do this while not fully synced?could you also tell me what information would you have to have access the ...
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2answers
108 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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1answer
80 views

Time needed for Bitcoin core synchronization

I had put on the process of synchronization on BITCOIN CORE and it has been around 2years since I had started the process and still its not completed, therefore now I would like to put some questions ...
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4answers
17k views

Check status of daemon?

I have started bitcoind on my linux box. How can I ask it what its status is? I assume it is downloading the blockchain and will continue to do so for hours or days. How can I find out where it is in ...
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1answer
1k views

"Failed to connect best block" error when I try to load my wallet

Everytime I try to open my wallet this error comes up. I have shut the computer down a few times and removed the wallet and reloaded it a few times too and the error keeps happening. If you can'...
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1answer
659 views

synchronizing block headers

When I opened the bitcoin client, I found that it was "synchronizing block headers". Does this mean that the client first downloads block headers and then downloads block bodies? What kind of file ...
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0answers
20 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
303 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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34 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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1answer
3k views

What is the point of downloading the blockchain?

I have Bitcoin-core on my mac, and currently it is syncing. But what exactly is the point of having the entire blockchain downloaded onto your computer? Is it only there so that you can have an ...
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1answer
80 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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1answer
33 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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0answers
26 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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3answers
1k views

How long should it take to synchronize with blockchain?

I expected to find the answer somewhere here, but I could not find it. I am using windows 10 and the bitcoin core wallet, with 2GB database cache. I have set the wallet to start on system boot, and I ...
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1answer
49 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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0answers
50 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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0answers
48 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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1answer
125 views

What are the downsides of integrating accumulators like Utreexo to bitcoind?

Inspired by the discussion on this question, I wonder what the downsides would be of adding accumulators like Utreexo (site, paper) to bitcoind? On the positive side, it seems like a huge improvement ...
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2answers
173 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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3answers
52 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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0answers
24 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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1answer
393 views

How Do Peers Choose Which Peer To Trust?

So the way I understand how the blockchain works is that each new block uses the previous block's hash, which means if my block[100].hash != someone_elses_block[100].hash that means that either I ...
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3answers
88 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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3answers
18k views

Blockchain synchronization is painfully slow / Best way to download blockchain

I'm trying to setup my own Bitcoin node on Ubuntu 16.04.1 LTS. Right now, I've stuck with blockchain synchronization. I'm letting bitcoind to run every day for at least 10-12 hours while I work and ...
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0answers
324 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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2answers
297 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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