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

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1answer
30 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 ...
1
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1answer
16 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.
1
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1answer
16 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 ...
1
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2answers
54 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 ...
0
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0answers
25 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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0answers
75 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 ...
1
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1answer
25 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
43 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
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1answer
40 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 ...
0
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1answer
60 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. ...
2
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1answer
77 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 ...
1
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2answers
30 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?
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1answer
112 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 ...
3
votes
1answer
62 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 ...
3
votes
1answer
690 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 ...
1
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1answer
103 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 ...
2
votes
1answer
219 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
385 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.
1
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4answers
139 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 ...
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2answers
4k 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 ...
1
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2answers
424 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 ...
0
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0answers
30 views

Bitcoin QT Can't Sync to server [duplicate]

I just started to try out bitcoin, and I heard you needed Bitcoin QT. I downloaded it and opened it up, and it says "Synchronizing with network" at the bottom. I have had it open for more then 20 ...
1
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3answers
284 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 ...
1
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1answer
104 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 ...
2
votes
1answer
101 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): ...
1
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1answer
94 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.
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3answers
187 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" : ...
2
votes
1answer
259 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 ...
-1
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1answer
166 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 ...
4
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1answer
63 views

What is the point of comparing sha256 of downloaded file with published on the same website code? [closed]

Some websites publish sha256 to check authenticity of downloaded file. I suppose this is to protect against man-in-the-middle attack - that my file was not altered during download. What prevents ...
0
votes
2answers
226 views

Is there any altcoin with improvements in blockchain download time?

Let me introduce my idea. Given: sizeof( Blockchain ) = 16Gb Downloading of one avi film 16GB from the pirate bay ( 5mb/s ) = 2-3 hours Downloading of bitcoin's blockchain ( 5mb/s ) = 2-3 days One ...
1
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2answers
795 views

bitcoind in testnet is not synchronizing

I installed bitcoind into Linux. I'm running it in testnet mode but it is not synchronizing as it is not downloading blocks. I have the following in bitcoin.conf: rpcport=8332 # Needed for testnet ...
2
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0answers
330 views

digitalcoin wallet won't sync

I've had my digitalcoin wallet open for a few days now, hoping it would eventually sync back up but it's seemingly stuck, not necessarily at a specific block, but around 3 days back, whichever block ...
0
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0answers
63 views

Installed Bitcoin-QT on windows2008r2 server, but it won't snyc anything at all

Installed Bitcoin-QT on windows2008r2 server, but it won't sync anything at all. No connections to network, no blocks, no movement full stop. I have OK'd it in windows firewall, tried connecting ...
4
votes
3answers
512 views

Are there any cryptocurrencies with no mining beyond participation?

I mean something where just participation in the decentralized network gives you coins somehow and you cannot do anything beyond (excluding more participation, of course, by having multiple PCs and ...
0
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1answer
44 views

how to get clients sync status via API

I try to use the build in API by bitcoin client and I wonder how to get the sync status via API of a runing client.
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0answers
296 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 ...
1
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1answer
522 views

Armory takes 8 Hours to sync. Is it going to get worse as Bitcoin becomes more popular? [duplicate]

I have been experimenting with Bitcoin and I installed Armory wallet. It told me that it would take approximately 8 hours to sync the worldwide ledger. My question is, as Bitcoin gets more popular, ...
2
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1answer
71 views

Download only first few blocks of blockchain

Is there an archive location or a place where I could be able to download only the first few hundred blocks of the block chain?
2
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1answer
244 views

mapOrphan overflow, removed 1 tx

I'm trying to download the block chain and synchronize with the network (using Bitcoin-qt 0.8.6). I have a 2 year old wallet.dat file with a fractions worth of unconfirmed bitcoins. After over a day ...
3
votes
2answers
14k views

Faster way to sync my new Bitcoin wallet?

I'm very new to Bitcoin so I apologize if this question is naive. I just downloaded the Bitcoin, Litecoin, and Dogecoin Qt clients and opened each of these apps. Consistent with their coin's ...
1
vote
3answers
2k views

Why is Bitcoin-qt using my CPU at 100%?

I am running Windows 7, and every time I open Bitcoin-Qt (v0.8.6-beta) during synchronization my CPU runs at around 95% according to the Windows Task Manager. As soon as synchronization is finished, ...
0
votes
1answer
10k views

Wallet Out of Sync and Bitcoin transfer

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 synch process finishes or have ...
2
votes
1answer
314 views

Miner seems to be stuck at receiving new blocks

I have two laptops cranking hashes for pooled mining. My Mac is set up correctly, and I see the (yay!!!) messages pretty often from the minerd.exe output. However, the PC I have cranking never seems ...
1
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4answers
143 views

Is there a way to monitor what bitcoin-qt is doing on a mac os x?

Using 0.6.6.2 on a mac mini; has been running for 56 hours now, still not fully synchronised; is there a way to monitor whether the program is actually doing something or just stuck? would the 0.8.x ...
1
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1answer
3k views

Need help! Initial sync not progressing, BTC sent already, + warning message

Please help! I look forward to your intelligent caring responses. Here is the situation: I'm trying to do the initial synchronizing of Bitcoin-QT, which hasn't progressed in 14 hours, and: - ...
2
votes
1answer
408 views

Bitcoin-QT client shows coins, but cannot find wallet.dat

It's been a couple years, and I opened my bitcoin-qt client. It says I have coins, but is taking days to "sync with network". Further, I cannot find a wallet.dat file anywhere on my system. How ...
0
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4answers
693 views

Bitcoin qt synchronization problems!

So bought my first Bitcoins the other day (27 & 28/11/13) on localcoins, then transferred them to a MultiBit wallet. No problems. I decided to use a 'safer' wallet, therefore I moved the coins to ...
0
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2answers
347 views

Bitcoin too large file

I installed the bitcoin program and now it's synchronising, and although I installed it on my very large D: disk it's moving all of the stuff on my little C: disk. It's now around 6 GB in size with 45 ...