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

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42 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
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1answer
44 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
88 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
111 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
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1answer
65 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?
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1answer
139 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 ...
3
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1answer
129 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
131 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 ...
5
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0answers
91 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 ...
2
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1answer
156 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
61 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
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 ...
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1answer
84 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
77 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
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1answer
65 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 ...
5
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1answer
142 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
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1answer
83 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
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1answer
74 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
101 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
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1answer
112 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: ...
2
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2answers
368 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
82 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
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1answer
93 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 ...
3
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2answers
227 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 ...
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0answers
110 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 ...
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2answers
243 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 ...
2
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1answer
38 views

Stopping Hash field in GetBlocks Message

Reading Bitcoin Developer Guide, I couldn't fully answer following question: What is the exact purpose of the Stopping Hash field inside a GetBlocks Message?
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0answers
73 views

How to check Bitcoind block chain download progress level without blockchain explorer?

so my problem isn't with bitcoin particularly but with a dying altcoin, I have the same problem as here. But can't use a blockchain explorer site, since there doesn't exist one. Is there any way to ...
0
votes
1answer
54 views

Unable to receive/preview funds due to un-synced wallet [duplicate]

I bought bitcoins and sent them to the wallet, however the wallet is not synchronized and as a result I cannot see my bitcoins. Will I be able to see them as soon as the synchronization process ...
1
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1answer
106 views

Altcoin peers do not sync with each other

I created two altcoin peers and they can add blocks to genesis block. However their blockchains do not sync with each other! The only way let the block merge is to stop a peer and restart the peer. ...
3
votes
1answer
121 views

Send download link of a file after Bitcoin payment

I'm starting an online business. My website is hosted on OVH I would like to send a download link after a bitcoin payment. Are there specific stuffs I should be aware of? Is this difficult to ...
2
votes
1answer
59 views

When was getheaders added?

Bitcoin 0.10 uses getheaders to synchronize. How long has this message been supported by other clients? How many existing nodes support it?
2
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1answer
245 views

Is there a way to reindex from disk but not start from blk0000.dat?

While my Bitcoin-Qt was synchronizing, I ran into the following error: It first loaded full blocks from blk00000.dat to blk00217.dat file (with file size about 131 MB per file). Then Bitcoin-Qt ...
4
votes
1answer
107 views

How to determine custom synchronization status?

Context: I'm working on an application in which we'd like to know if the current node is sufficiently synced to be able to handle RPC requests. The method we would like to use is to see if our node ...
4
votes
1answer
1k views

How come importing the bootstrap.dat to Bitcoin Core takes so long?

So I downloaded and installed BitCoin Core X64 v0.9.3 from https://bitcoin.org/en/download. I then downloaded the linked bootstrap.dat torrent and after it downloaded the bootstrap.dat, I moved it ...
2
votes
1answer
122 views

Bitcoind suspend when Synchronizing blocks

My bitcoind started synchronising blocks. The bitcoind version is 0.93. When the bitcoind found an orphan blocks in the synchronising process, it seems stop and did not work. the message from the log ...
4
votes
1answer
509 views

Safely interrupt -reindex?

My database became corrupted and I had to reindex: bitcoind --daemon -reindex It takes my computer quite some time and CPU power. It's been running for an hour but it will take at least 4 more ...
0
votes
1answer
630 views

My Bitcoin wallet is out of sync after connecting for the first time [duplicate]

It's 4 years out of date. I have tried using a different network. Same thing. Don't know what to do but would appreciate help.
2
votes
4answers
155 views

Would it be possible to add an RPC call to be able to determine if a node is fully synced?

After reading this answer, where Peter Wuille talks about how a node can't really tell if it is synced or not, it got me wondering if there is a way we can tell that a node is as synced as it possibly ...
2
votes
2answers
11k views

I can't find my bitcoin address and my bitcoin core is out of sync by 3 years

Hey guys I am a newbie at Bitcoin just recently found out about it. I downloaded Bitcoin core; I encrypted the wallet; I created a backup folder, but it is out of sync by 3 years 4 weeks and i can't ...
2
votes
2answers
1k views

Do i need ~4 years to sync?

I just downloaded bootstrap (~21GB) and started bitcoin base. It shows me that time to sync will be 4 year and 17 weeks? Is it going to change, or do i have to wait that much? My internet downloading ...
2
votes
3answers
462 views

If using Bitcoin core client am I constantly going to be downloading data from the blockchain?

I understand you have to download the entire blockchain and sync in the beginning but don't you also have to constantly keep the software on if you want to buy/sell stuff, which means more data being ...
1
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0answers
65 views

Bitcoin Core and Armory working together? [duplicate]

I am confused, totally new to Bitcoin and not really a digital expert, so forgive me if the following is stupid. I downloaded Armory two weeks ago and it asked me to also install Bitcoin QT which I ...
2
votes
1answer
110 views

Can you switch the method of blockchain download?

I torrented bootstrap.dat and used am using it to populate the blockchain. It is close to being complete, but my server has ran out of room. There is room for one copy but not enough for two. Is it ...
4
votes
1answer
175 views

BIP32 wallet sync with Bloom filters

I'm working on my SPV library and I still have a hard time figuring how to approach the BIP32 + Bloom filters combination. Here's how I currently sync an existing HD wallet (after fast catch-up): ...
2
votes
1answer
136 views

I sent bitcoin from my BitcoinQt wallet while it was unsynced to another wallet, do I have to wait for it to sync?

The wallet shows that the transaction has not been broadcasted yet with 0 of 6 confirmations. My wallet is stuck on a block right now.
2
votes
3answers
235 views

How to set syncnode of a peer to true?

I have a testnet connection with 3 clients. When I am doing getpeerinfo on 1 I am getting [ { "addr" : "172.20.61.111:63379", "services" : "00000001", "lastsend" : ...
3
votes
1answer
347 views

Wallet takes way too much time to keep up to date?

I would like to start using bitcoin more for day-to-day transactions. However, it takes way too long to keep my wallet up to date to be practical. I am using Bitcoin Armory, though I have had this ...
3
votes
1answer
283 views

Can synchronization be interrupted and continued later?

I was using the official Bitcoin client some time ago. It was version 0.5 I think. Then my computer crashed and didn't use Bitcoin for a long time. I was lucky because I had a backup of the wallet. ...
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1answer
226 views

Using blockchain to publish downloadable software verification codes

What is the point of comparing sha256 of downloaded file with published on the same website code? Why can't developers of currencies publish file version and sha256 hash on blockchain as alias or ...