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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13 views

Should I wait to sync the Armory so that I can receive Bitcoins? [duplicate]

I use Armory. Today I bought some bitcoins but my wallet in that App shows no currency. Instead it said in order to get online you have to install Bitcoin Core. I did that and now it shows "...
6
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2answers
2k views

what is the "Banlist" (Bitcoin Core)

Upon start up, after it has downloaded and verified the blocks, the Bitcoin Core client "loads the banlist". What is this banlist?
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1answer
525 views

Slow synchronisation bitcoin-qt - bread wallet [duplicate]

I have used bitcoin-qt for a while, but I have read now there is bread wallet for iOS more secure than any OS X wallet, is this true ? I didn't update it for a while and now it is like 60+weeks ...
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1answer
3k views

How to speed up initial block chain sync using SSD without wasting space?

I have a 60GB SSD as my Windows system drive, which isn't enough to save the entire blockchain to. I installed BitCoin Core (bitcoin-qt) and set the data directory to be on my 2TB HDD. However, the ...
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1answer
374 views

How long does it take for a SPV to intermittently sync (order of magnitude)?

Say I have a device that is mostly offline, with a SPV on it. Say once in a while (for instance once a week) I go online for about 20 minutes, and make a large number of transactions (which are ...
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1answer
3k views

My Bitcoin Qt is behind 7 years and 32 weeks

My Bitcoin Qt is behind 7 years and 32 weeks... I'm new to all this so I wonder: if I shut down the pc, is the sync gonna continue or will it restart from the beginning? And.. how can I get my ...
5
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1answer
729 views

Faking blockchain data in bitcoin-core

Let's say I found a tarball with blockchain data files which I load to my datadir and start my Bitcoin Core client, what sort of attacks am I vulnerable to? Could the files contain fake balances? If ...
1
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1answer
181 views

Changing prune size in working bitcoin daemon

I need to free some disk space in bitcoin server. Will bitcoind download all blocks from scratch again if I change 'prune' value in bitcoin.conf over working daemon?
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1answer
341 views

Sent Bitcoin to Bitcoin Core Wallet before it finished "syncing with network"

So I bought some bitcoins and sent it to my Bitcoin core wallet before it finished syncing with network, will the transactions come through once it finishing syncing or have I lost them?
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3answers
679 views

Is it normal not to see my sending/receiving addresses while the bitcoin client is syncing?

I am using bitcoin core on windows 7, it takes forever to sync and during this time I cannot see any sending/receiving addresses in my interface, I only see "balances" (empty), "recent transactions" (...
2
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1answer
473 views

Bitcoin core: boostrap.dat trade-off with "Synchronizing with network..."

Being, now, aware that users of Bitcoin Core (v0.12.1.0-g9779e1e) are no longer to use a torrent download of a bootstrap.dat and, instead, are admonished to simply launch Bitcoin Core and permit "...
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1answer
134 views

Takes longer to download newer blocks?

I have been downloading the blockchain to a new client and it has been at it now for almost a week. One thing I notice is that as it is getting close to the end, it is slowing down a lot. For example,...
4
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1answer
150 views

What is the best way to share the blockchain and get it verified by the wallet?

I am the owner of BlockchainDownload and am looking for a way to get some trust in the website. I have shared the link in a couple of topics an get the response "Please do not suggest that people ...
15
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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 ...
5
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2answers
110 views

Correlation of number of (non mining) full nodes to internet bandwidth

Are there any correlation studies showing the number of (non mining) full nodes per country (total or per/capita) compared to average internet connection speeds? I know there are great differences ...
2
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1answer
158 views

Is reliance on a UTXO Set provided by other users dangerous?

One of the largest hurdles in my mind to increasing the number of full nodes operating is the startup cost related to downloading the blockchain. A similar but less important (in my mind) issue is ...
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2answers
1k views

Does desktop wallet need to be online for the coins to mature?

Suppose, I've installed a new coin wallet, got synchronized with the network, now I've sent some coins to my wallet. Now, if I close my wallet (and stay offline), would it get maturity after X amount ...
7
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1answer
3k views

Can I retrieve my bitcoins from years ago that I never received?

How can I get hold of my bitcoins that never made it to my wallet years ago? I purchased some bitcoins years ago (have got my receipt and all emails from who I purchased). I downloaded Bitcoin-Qt 7, ...
2
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1answer
359 views

Transfer from Bitcoin Core to Electrum expired before full synchronization. Where are the bitcoins?

I started using Bitcoin Core and transferred coins to this wallet. When synchronization got to the point where the coins showed up in the wallet I sent them on to an Electrum wallet, although Core had ...
6
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1answer
5k views

How to check if my node is fully sync'ed

Using bitcoin-cli, how do I check how sync'ed my full node is?
2
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1answer
273 views

What's the difference between synced_blocks and synced_headers?

My P2P is a bit rusty, but as far as I understand; if we're running a full node, other nodes will connect to us to share blocks. So I can see why it would be useful to be able to see how far behind ...
5
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1answer
610 views

Does Bitcoin Core leak private information during synchronization without Tor?

I'm very new to bitcoin. Sorry for maybe silly or paranoid questions, but: Do I compromise myself in any ways when I first time run the official Bitcoin Core client for downloading all transactions ...
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2answers
325 views

Is the getnewaddress command available before synchronization is completed?

Can I expect the getnewaddress command to work before my bitcoind has finished synchronizing?
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1answer
1k views

0 active connection to bitcoin network (testnet)

I am working with the testnet. I downloaded the bitcoin-core application on Linux and I am running the version Bitcoin Core version v0.12.1.0-g9779e1e (64-bit) I was able to download the bitcoin block,...
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0answers
701 views

help my Bitcoin core wallet won't sync

more Bitcoin core won't synchronize with network but my wallet has a balance of 0.00 it I have done transactions that reply back as true and if I do balance for those addresses it shows transactions ...
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2answers
5k views

How do i retreive my bitcoins that I purchased but never receaved because of the dodgie bitcoin qt years ago?

Hi guys I am seeking to retrieve my bitcoins I purchased years ago but my bitcoin qt never synced to receive them! I have now downloaded bitcoin core and I was advised that once I have done that it ...
3
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1answer
244 views

Fine tunning a Rapsberri Pi 2 B+ full 0.12 node

I'm running a 0.12 Raspnode (raspberri Pi 2 B+ full node) I've made the full node syncing in a laptop to speed up the process. Then, after moving all the files successfully and starting the full node ...
5
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1answer
526 views

Efficient way to migrate a pruned node

I would like to know what are the step to succefully migrate a pruned node. I have a Raspnode (rPi2B+) and it is so slow that it doesnt seem to sync the blockchain after several days... I want to ...
2
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1answer
563 views

Bitcoins lost in Bitcoin Core?

I sent a small amount of bitcoins to my bitcoin core account when I was messing around learning to use bitcoins several years ago. I am trying to access these coins but I never got along to utilizing ...
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1answer
813 views

BitCoin Core Error Message: "Assertion failed!"

I am experiencing a recurring problem with my BitCoin Core wallet. The main issue here is that I get an error message every so often as the program is updating the transaction blocks. Please see the ...
2
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2answers
196 views

How should a node deal with a block that is not connected to the chain?

Suppose I am a node in the Bitcoin protocol and I receive a block that does not point to any block in my current chain. Should I keep it on the side, waiting for missing intermediate ones? Should I ...
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0answers
381 views

Bitcoin Armory startup issues

I have an issue with Bitcoin Armory. I have run it on Win 7, Armory version is 0.93.3-beta. I have run it at least once a week an so far it worked properly. Now it wont sync with the network (jams at ...
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1answer
226 views

Bitcoin Core initialization taking forever

Today is the third day, when I'm waiting for Bitcoin Core win-x64 application will sync/initialize. How long should I wait more?
6
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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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4answers
4k views

Bitcoin Core extremely high syncing time

I'm running Bitcoin Core wallet on a gaming PC with a GTX 750ti, and 3.7ghz quadcore processor, and 16gb of ram. My internet download speed is 15 116mbps via hardwire. But for some reason the syncing ...
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1answer
1k views

Bitcoin core stopped sync'ing (without downloading all the data). How can I make it resume the synchronization? [closed]

I am extremely new to this concept but just decided to try. Unfortunately I did not do my homework before playing with my money. I bought some coins and I sent them to my Bitcoin core wallet (that I ...
1
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1answer
6k views

I Restored My Phone Wallet and Now All My Coins Vanished

TL;DR: After creating a backup, I added a pin to my "Langerhans" Dogecoin wallet for android. Now, the pin doesn't get accepted (or I forgot it). Finally, I used the "Restore Backup" function and got: ...
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2answers
198 views

Can I see a transaction sent to me if I haven't downloaded the whole blockchain?

Last received block was 12 weeks ago, and I'm still syncing. I have moved some bitcoins to this wallet from another, but I still can't see it in my inbox after a day. Is it because I don't have all ...
1
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1answer
813 views

Chainstate database for download

Is it possible to download a recent snapshot of the chainstate database? I'm running bitcoind (v. 0.11.8) on a machine with ~1mb/s download speed. After my client reached 300000 blocks, the ...
7
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2answers
6k views

What does "Activating Best Chain" mean?

What does "Activating Best Chain" mean? My Bitcoin Core doesn't freeze, it just takes a while. I'm curious as to what it's doing.
3
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1answer
140 views

When I'm downloading the blockchain for the first time, from whom am I downloading it from?

Is it p2p through BitTorrent protocol? Is it through a central server?
2
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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 ...
0
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1answer
86 views

2 years and 30 weeks to import blocks?

Im using litecoin and it says its gonna take 2 years to import blocks heres a screenshot: i have bootstrap.dat
4
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1answer
3k views

Wallet not updating with balance and database error

I'm fairly new to using bitcoins and have been having some trouble with my wallet. I bought bitcoins on coinbase and transferred them to my bitcoin core wallet. The transaction was confirmed with 616 ...
2
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1answer
873 views

Unconfirmed Transaction disappeared when I pressed "repair wallet"

I bought some bitcoins and send them to an a receiving address on Multibit HD, It has been maybe 3 or 4 hours without any confirmations, so I decided to press "repair wallet", which said it would ...
6
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1answer
684 views

Starting out with Armory - can I make it go faster?

Does anyone know of a way to make Armory do an initial sync any faster? I've downloaded the blockchain but so far it's been processing/synchronizing with the network for 17 hours, and it claims it ...
3
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1answer
681 views

How do I retrieve the funds on my Core wallet when I can't synchronize the blockchain?

I have about $200 in bitcoin but my wallet (Core) won't synchronize the blockchain (it's been doing this for days) since for some reason it got corrupted (As it tends to do say every other month) and ...
2
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0answers
105 views

Bitcoin .11 Initial Blockchain Download Problem with OS X 10.10

I am loading the blockchain for a new wallet. Initially I had problems due to ISP issues. This issue is fixed and I now have 8 outbound connections working well with ping times ranging from 50-800 ms. ...
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0answers
38 views

Block loading stuck on 1 year 13 weeks [duplicate]

My parent's have Windows Vista and recently we had a power outage and Bitcoin started from beginning loading blocks however for a week now it doesn't go below 1 year 13 months? As an inexperienced ...
2
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1answer
529 views

can i update my bitcoin qt 0.7 to 0.11 if my wallet has never synchronised and i'm still waiting to receive my bitcoins

can some one please give me some solid advice as i am in need of my coins and it seems this is the best way to retrieve my coins but i cant risk losing my bitcoins! i have tried to create a raw ...

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