The blockchain is a list of all transactions that have occurred using the bitcoin currency.
2
votes
2answers
164 views
Are all trades stored in block chain?
Are all trades stored in block chain?
Are all trades, like mtgox exchange, gambling, etc. stored in block chain? Or, few trades could have been skipped / ignored?
Consider this case, 'a' transfers ...
2
votes
1answer
80 views
Sending funds via routing number from bank
Is it possible to send funds from a bitcoin account via routing number to a trading account?
1
vote
1answer
281 views
Can I synchronize the blockchain on one computer then transfer the files to another? [duplicate]
Possible Duplicate:
Would it be possible to provide a downloadable blockchain that is updated and verified by a mass of people?
If I install and synchronize the official Bitcoin wallet, can ...
2
votes
1answer
106 views
List of problematic blocks [closed]
Is there a list of problematic blocks? I mean blocks in official blockchain that may cause carelessly written bitcoin client to stuck after receiving them? Can you provide a link for further reading ...
3
votes
2answers
97 views
Chronological list of transaction ids
Is there a way to get a list of the latest transactions IDs? I know I can watch incoming transaction almost live on http://blockchain.info, but is there a way to download the last 10.000 transaction ...
4
votes
1answer
182 views
Does the .bitcoin directory shrink in bitcoin-qt 0.7.2 and later?
The bitcointalk.org thread "Ultraprune merged in mainline" implies that a more efficient way of storing block information was introduced. Will this make the .bitcoin directory smaller after an upgrade ...
6
votes
2answers
666 views
Why must some bitcoin wallets download the block chain and others not?
What does it mean that some bitcoin clients download the entire block chain (all transactions ever happened) and others not?
0
votes
2answers
115 views
What is the total number of Bitcoin transactions processed so far? [duplicate]
Possible Duplicate:
How many transactions have been included into the blockchain?
The question explains itself.
1
vote
0answers
52 views
Install a pre-synchronized blockchain [duplicate]
Possible Duplicate:
Can I download the whole block chain from somewhere?
My Bitcoin client has been "synchronizing" for a really ridiculously long time making the computer leggy. According ...
3
votes
2answers
138 views
blockchain.info json API problem
I'm trying to get the time series for a specific period from blockchain.info but the json seems to not be there anymore. Does anyone knows if the json API is not available anymore or it is a temporary ...
0
votes
0answers
42 views
How Long for a transaction? [duplicate]
Possible Duplicate:
How to debug a long “0/unconfirmed” status in the bitcoin client?
I have sent a transaction to btc-e and 3 Hours later still no love
I thought there was 6 new blocks ...
3
votes
2answers
129 views
Is it possible for a valid block to be added to an invalid one, and have it accepted by another client?
This wiki page says invalid blocks aren't counted towards determining chain length and that make me want understand how invalid blocks are treated.
Can an valid block be added to an invalid one.. ...
7
votes
1answer
216 views
Does the synced blockchain always grow in size?
Every time the Bitcoin-Qt is launched, the blockchain syncs to update to its latest state. Does this mean the data stored locally will always grow continously, eating up all available space ...
2
votes
1answer
134 views
Is the Testnet stable?
I have been recently playing with the testnet (using bitcoin-qt -testnet). I have been able to mine a few coins and do some test transfers, but I have found some problems:
The coins appear sent, but ...
4
votes
2answers
112 views
Is there a place or tool to monitor all addresses for unmoved coins?
I've been looking for a way to easily monitor all address with a balance, that the balance has not moved/changed for a period of time (based on a criteria such as 1 year). Is there a site/tool already ...
5
votes
2answers
262 views
Transactions with a wait time (using nLockTime)
I'd like to know if there are transactions that can only take place at some predefined moment. In principle, it should be possible to use the parameter nLockTime to wait for a particular block number:
...
2
votes
1answer
91 views
When does Blockchain.info show 127.0.0.1 as “first relayed by” for a transaction?
Does this mean the transaction had to come from a Blockchain.info/wallet user (or perhaps someone using Blockchain.info/pushtx)? Or could this indicate something else (e.g., a node from Tor even)?
3
votes
1answer
129 views
How can I tell if someone is trying to hack port 8333?
I am experimenting with leaving a public replica of the Bitcoin chain on the internet. In doing so I'm actively monitoring the debug output so I can get a sense of what is happening with the inbound ...
1
vote
1answer
49 views
How do I test that blockchain p2p replication is properly, securely exposed to the internet?
I have bandwidth and CPU to spare and I'd like to participate in the P2P nature of sharing the blockchain to other peers. How can I properly, and securely participate?
Also, how can I test or verify ...
2
votes
0answers
108 views
What are “discouraged blocks” in the coin base? (examples and explanation please)
As of the time I write this, only one block type is marked as "discouraged", and I'd like to understand why this exists.
Is a correct reading that is that "it should be in the coin base"? and not ...
5
votes
3answers
4k views
Why are Bitcoin calculation “useless”?
The FAQ says:
Why don't we use calculations that are also useful for some other purpose?
To provide security for the Bitcoin network, the calculations involved
need to have some very ...
4
votes
1answer
122 views
How to calculate bitcoin days destroyed percentage
I understand the concept of bitcoin days destroyed but on the wiki
https://en.bitcoin.it/wiki/Bitcoin_Days_Destroyed
And the site calculating it
http://abe.bitcoinstats.org:2750/
They give a ...
5
votes
2answers
242 views
Is it possible to view others' transactions in bitcoin client?
This seems like a really basic question, but I'm having trouble searching for answers on it. My understanding is that my bitcoin client (Bitcoin v0.7.1-beta) has basically theoretically downloaded the ...
3
votes
1answer
274 views
How many Bitcoins existed when block 209,999 was mined?
This article claims there are now 10,499,925 bitcoin (at the time of the reward drop from 50 to 25).
Weren't there supposed to be exactly 21,000,000 / 2 = 10,500,000 BTC mined at this point? What am ...
3
votes
2answers
161 views
What does the term “Longest chain” mean?
What does the term "Longest chain" mean, as there is only one 'right' blockchain exists? How another longer chain would make the 'right' chain invalid?
16
votes
1answer
748 views
When was block 210000 generated and who solved it?
When was block 210000, the first block to feature halved 25BTC reward, generated and who solved it?
7
votes
1answer
392 views
Should an end-user download the whole blockchain? Or is a “lightweight” client sufficient?
The average user normally doesn’t want to host a 3+GB file on his machine and wait for hours for it to download.
What are the security risks of running a lightweight client? And how does this affect ...
0
votes
2answers
301 views
Would it be possible to provide a downloadable blockchain that is updated and verified by a mass of people?
As of November 2012, the blockchain is nearly 3 GB in size with a near-linear growth of about 500 MB/month (cut from exponential growth by the hard-coded block size limit, I guess).
I want to install ...
3
votes
2answers
222 views
Bitcoin contracts. Are there good examples in the blockchain?
I have been checking the Bitcoin wiki for script and Bitcoin contracts and I have some doubts about advanced contracts.
For instance, I have seen in many places references to password controlled ...
4
votes
1answer
150 views
Can any Bitcoin client do local peer discovery and blockchain synchronization?
Usually, when a full Bitcoin client such as bitcoind, Bitcoin-QT, or Multibit start on a fresh installation, they connect "to the network" to download the blockchain. If someone has multiple computers ...
2
votes
2answers
336 views
Is wallet.dat linked to the blockchain file?
Just started using bitcoins today and since i needed them rather urgently I hastily bought them and transferred them to my wallet before actually setting up my wallet.The client is downloading the ...
5
votes
0answers
267 views
My sync wont start, what can I do?
I have used Bitcoin previously via Windows GUI miners, but never faced an issue like this before. I am now running Ubuntu 12.04 amd64 and using an updated 0.7.1 Satoshi client.
The sync looks like ...
-1
votes
1answer
105 views
HELP me to accept BTC in virtuemart [closed]
Is there someone who can help me to setup BTC acception in virtuemart, i found this http://blockchain.info/api/api_receive but i don't know exactly how to setup this in virtuemart, i want it realy, ...
3
votes
1answer
2k views
Synchronising official bitcoin wallet for the first time; at 95% started going backwards
I.E. 9900 blocks remaining, 9904 blocks remaining and the total percent synced is decreasing. Is this normal behaviour? I'm on a mobile broadband connection but http connections are working just fine. ...
1
vote
1answer
115 views
How can I use the blockchain API?
The blockchain is not designed in a way where you can easily get information correct? You have to know more than python basics and have good programming skills as their seems to be no API, and no ...
3
votes
1answer
271 views
Can I reuse blockchain/index files with multiple wallets?
With the bitcoin-qt client, I'd like to have multiple wallets use a single set of blockchain data files.
Why? Downloading a fresh copy of the blockchain can take days, and each copy of the blockchain ...
3
votes
2answers
237 views
Is it possible for a decentralized currency to have untraceable transactions?
I have been reading a bit about Bitcoin recently and am fascinated with the project and think it has great potential.
However, one thing I think it needs in order to gain mass popularity is to make ...
2
votes
0answers
149 views
Bitcoin-qt falls behind on blockchain, how to replace?
On Apple Mac, bitcoin-qt is 14 days behind. Never approaches current time. Have downloaded current blockchain from trusted source. Where to install? What procedure?
0
votes
2answers
1k views
I cannot send bitcoins from my block chain wallet because I don't have the private key. Where is it located?
I didn't create a private key for my bitcoin address and am unable to do anything with these coins. How do I resolve this issue?
2
votes
1answer
360 views
What is the structure of blk001.dat and blkindex.dat?
Can anyone tell me where I can read about the structure of the files
blk0001.dat
blk0002.dat
blkindex.dat
I know that in these files bitcoin is saving all the information about transactions.
I ...
2
votes
2answers
235 views
What is a double spend?
What is a double spend?
As someone who uses Bitcoin, what do I need to know about how the Bitcoin system prevents double spends? Are there still circumstances where they can occur?
3
votes
2answers
249 views
How will a massive increase in hashpower affect orphan rates?
Difficulty always lags behind a little. It is also limited in how large adjustments it makes each time. What if the (global) hashrate doubles overnight? What if it quadruples?
How much can we expect ...
3
votes
5answers
5k views
My client stopped synchronizing, how can I access my wallet?
My wallet has been stuck synchronizing for 21 days, my transfer is in the block chain but I can't get it to sync with my wallet. I've closed firewalls, uninstalled and reinstalled QT with back up and ...
1
vote
0answers
201 views
How to use downloaded blockchain on ubuntu?
I am using a fresh install of Bitcoin and have no wallet with coins at this time, and want to use the Bitcoind service in short time (loading blockchain using bitcoind will take days because of slow ...
4
votes
4answers
2k views
What happens once mining reward gets cut in half?
Sometime around the end of 2012 the mining reward is expected to be cut in half from 50BTC/block to 25BTC/block.
What effect will this have? Doesn't this mean it will be less economic to run a ...
1
vote
2answers
316 views
Does blockchain.info show all transactions?
My client is still syncing, so I've been checking my transactions on blockchain.info. It only shows two transactions although I know I should have more than that when I search my address. I'm new to ...
1
vote
2answers
135 views
how http://blockchain.info/, http://blockexplorer.com/q or http://www.bitcoinmonitor.com/ works [duplicate]
Possible Duplicate:
How can I read information from the blockchain?
Can anyone tell me from where exactly sites like
http://www.bitcoinmonitor.com/
http://blockchain.info/
can't post ...
-2
votes
1answer
309 views
What computations does Btcoin perform during mining? [duplicate]
Possible Duplicate:
What exactly is Mining?
What are the exact computations dies Bitcoin is performing during the mining?
I understood that it has to do something with hashes and ...
1
vote
1answer
145 views
What is the key difference between the Proof of Activity proposal and Proof of Stake?
coblee (Litecoin creator) suggested a new Proof of Activity method, to complement Proof of Work, instead of using Proof of Stake (oh my!)
Can someone provide a tl;dr of what is the key problem in PoS ...
1
vote
1answer
186 views
At the 95% mark for hours
My Bitcoin app (the latest OS X client) is downloading the chain. It has been at the 95% mark for many hours now. It's progressing, but very slowly.
Is this normal?
I would think so, because this is ...
