The process of bringing a Bitcoin client up to date with the blocks it is missing from the block chain.

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4
votes
1answer
41 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 ...
3
votes
1answer
34 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 ...
1
vote
2answers
643 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
votes
1answer
128 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, ...
0
votes
1answer
42 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 ...
0
votes
0answers
41 views

Litecoin clone with no checkpoints

My Question is this: I am creating a little altcoin clone from https://github.com/Litecoin-Java/bitcoin-wallet but i want the new coin to have NO checkpoints. So what i did is comment out the of ...
2
votes
1answer
57 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?
3
votes
1answer
32 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 ...
4
votes
1answer
52 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 ...
1
vote
2answers
37 views

Is the getnewaddress command available before synchronization is completed?

Can I expect the getnewaddress command to work before my bitcoind has finished synchronizing?
1
vote
1answer
67 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,...
1
vote
0answers
118 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 ...
0
votes
2answers
127 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
votes
0answers
98 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 ...
4
votes
1answer
72 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
votes
1answer
103 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 ...
0
votes
0answers
44 views

bitcoind sync slowing dramatically

I booted up a download of the blockchain around 36h ago, at that time the download was really quick and I went to sleep in the evening expected to be ready to go in the morning, whereas I only got ...
1
vote
1answer
71 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
votes
2answers
55 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 ...
1
vote
0answers
72 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 ...
0
votes
1answer
73 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?
4
votes
3answers
152 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 ...
1
vote
2answers
166 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 ...
2
votes
1answer
113 views

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

I really need your expertise guys. 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 ...
0
votes
1answer
129 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: ...
1
vote
2answers
110 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
vote
1answer
178 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 ...
3
votes
1answer
82 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?
1
vote
1answer
167 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
votes
1answer
70 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
3
votes
1answer
248 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
votes
1answer
291 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
votes
1answer
208 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
votes
1answer
210 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
votes
0answers
68 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. ...
1
vote
0answers
26 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
votes
1answer
144 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 ...
2
votes
1answer
137 views

How to synchronize with the bitcoin blockchain via bitcoinJ

I'am writing my very first application using bitcoinJ api and I got a bit stuck. Maybe somebody can tell me what I am missing. My practice app wants to write a sample contract in the bitcoin ...
6
votes
1answer
76 views

What happens in detail, when Bitcoin Core verifies a block during synchronization?

Since version 0.10.x, block headers are acquired separately, and therefore download is not delayed until previous blocks have been verified. Previous questions about synchronization mention that the ...
6
votes
1answer
179 views

Bitcoin Core V 0.10.0: Is there a way to force send when not synchronized?

My Bitcoin Core is not yet synchronized, but I already attempted sending a transaction, so now it is 'conflicted'. I can see this conflicted transaction is not being propagated. Is there a way to ...
-1
votes
1answer
119 views

I sent bitcoins to my wallet before it was synced. Is there anyway to transfer the funds to a different wallet without waiting fo it to properly sync? [duplicate]

I sent bitcoins to my wallet before it was synced. Is there anyway to transfer the funds to a different wallet without waiting for it to properly sync? The wallet still says no available funds or ...
1
vote
1answer
107 views

I am new and I did not get bitcoins [duplicate]

I am new to Bitcoin. So, I downloaded the Windows Bitcoins software from the official website and used the "request bitcoins" option to request bitcoins from my exchanger. My exchanger charged me $20 ...
3
votes
1answer
116 views

Can synchronization time be reduced?

I'm trying Bitcoin for the first time, so I'm about 7 years behind. As far as I understand every bitcoin user has a copy of the entire transaction record that has happened for all time for all ...
6
votes
1answer
147 views

Bitcoin Client crashing while syncing

I am getting this problem today: when syncing, the client suddenly crashes with the following debug.log: ..... 2015-06-29 14:30:34 IO error: C:\Users\Internet\AppData\Roaming\Bitcoin\chainstate\...
2
votes
2answers
405 views

bitcoin core 0.10.1 upgrade stuck syncing

I just upgraded from Bitcoin Core 0.9 to 0.10.1 on Ubuntu 14.4 after being gone for a few months (blockchain data is from February). When I loaded up bitcoin-qt, it seemed to be working fine and ...
2
votes
1answer
106 views

Does synchronization takes such long time for first time or every time when syncing?

My internet bandwidth is around 10 - 20 KB/s. If I could sync with it for the first time then no problem. If I should need to sync it every time when opening it then it's really a big problem for me.
2
votes
1answer
115 views

Reduce Wallet Sync Time

So I am new to Bitcoin and I run the Bitcoin Core on my computer. I know that you need to wait for your wallet to sync before you can make transactions, but it says it won't finish syncing for 4 years....
5
votes
2answers
383 views

How to know if bitcoind synced?

I installed the bitcoind and started it as daemon. After 10hours I've tried "du -h" ubuntu@ip-172-31-37-93:~/.bitcoin$ du -h 16K ./database 59M ./blocks/index 29G ./blocks 646M ./...
1
vote
0answers
125 views

Stop Bitcoin Block ReIndex

I just recently installed armory an bitcoin-core. They constantly are using 100's of GB's of internet. Its getting annoying, because i cant really use the bitcoin if armory is constantly offline. I ...
1
vote
2answers
403 views

How do I synchronize my wallet quicker with bitcoins already sent?

I have my first ever Bitcoin wallet, I instantly sent the bitcoins from blockchain.info to my wallet. Without realizing, my wallet is currently (4pm May 8th 2015) 1 year and 42 weeks behind. Is there ...