Confirmations are blocks that are dependent on a given transaction. This includes the block containing that transaction and all blocks after it in the hash chain. The more confirmations a transaction has, the more likely that it will remain in the chain permanently.
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2answers
172 views
how long do i have to keep Bitcoin-Qt open after sending coins
Can I close Bitcoin-QT client and power off my computer just after sending coins to someone or do I need to wait until 1, 2...6 confirmations?
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2answers
49 views
Instant confirmations with pre-published, locked, transactions
(Clarification: This is not an attempt to solve the problem of a vendor taking the money and running without handing over the merchandise. Problems like that can't be solved without some third party. ...
0
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1answer
111 views
Speeding up bitcoin transactions?
I am writing an app which trades bitcoins and one of the biggest problems I have run into is that it takes so long to move them from one wallet to another. I thinks it due too mtgox and other sites ...
1
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1answer
94 views
Is four confirmations enough if the network hash rate is so high?
The point of waiting for six confirmations is that it becomes near impossible to create six blocks vs the network. So double spends a effectively eliminated. With the hash rate of the network so ...
2
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1answer
56 views
What are recourse or non-recourse transactions?
This may not be a Bitcoin-specific question, but I still think it's better to ask it here.
I've seen discussions about accepting unconfirmed transactions, that it should not be done because of ...
5
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2answers
33 views
Is there any discrepency on Confirmations?
Is there ever a situation where some bitcoin client thinks a transaction has 3 confirmations and another bitcoin client (or website) thinks a transaction has 4 confirmations, for example?
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2answers
67 views
What factors determine how long confirmation takes?
Simple question...
What are all the factors (all of them!) that determine how much time X number of confirmations of a transaction takes?
2
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1answer
321 views
Why is my transaction not getting confirmed and what can I do about it?
I sent around 12 BTC from my Blockchain.info wallet to my LocalBitcoins account. They are showing at LocalBitcoins as an unconfirmed transaction. I have the fee setting at BlockChain.info set at the ...
2
votes
0answers
63 views
How many confirmations is enough if block creation rate is volatile?
Right now, the number of blocks created is increasing at a rapid rate. In addition I tried to import coins into a MtGox account and noticed that even after 8 confirmations the funds aren't available.
...
0
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0answers
73 views
Suddenly no new confirmations on bitcoind
I'm using version 40000 of bitcoind and yesterday it stopped receiving new confirmations. Here is the getinfo for it.
"version" : 40000,
"balance" : x,
"blocks" : 225454,
"connections" : 8,
...
3
votes
3answers
161 views
How many confirmations do I need to ensure a transaction is successful? [duplicate]
As a regular user of Bitcoin, I often send bitcoins to other, or receive BTC from others, sometimes this might be a trade or deposit. Some traders require at least 6 confirmation, some require at ...
1
vote
1answer
131 views
How can I determine the number of confirmations of a transaction and its fee using the Blockchain.info DATA API?
I was wondering if I could know, by using the BlockChain.info DATA API (https://blockchain.info/api/blockchain_api) if any given transaction has confirmations and has payed the miner's fee.
5
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1answer
185 views
Understanding speed vs. fees on various wallets, esp. Instawallet and original client
The Bitcoin Wiki don't say much about fees, more precisely if you have a choice between speed vs. fees (pay more, deliver faster).
In fact, I don't yet even have a clue how fast are bitcoin ...
2
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1answer
71 views
Where can I learn more about BIP30; namely the exploit and the background discussion?
I'm having trouble understanding the bug that was fixed in BIP030, and how it would be exploited.
Is the premise of this attack that there would have to be a netsplit and the chain was forked, then ...
0
votes
1answer
86 views
How can i effectively split large outputs into smaller ones?
I have a wallet that pays lots of small amounts in the range of 0.x to 5 BTC.
I filled the wallet with one transaction of 50 BTC, so there is only one large input contained.
Now when i transfer 0.5 ...
2
votes
1answer
47 views
In ListReceivedByAddress, what is the meaning of Confirmations if the address is reused?
The API ListReceivedByAddress allows me to view a list a sum* of all the transactions that an address has received. This returns an array listing the sum of what was sent.
If the address is reused ...
3
votes
1answer
71 views
Is the current number of confirmations visible somewhere in the raw block?
Is the current number of confirmations visible somewhere in the raw block output created by blockexplorer or blockhain.info?
Is this information available in the raw stream or is the number of ...
6
votes
3answers
869 views
How important is the fee for speed of confirmation?
I am developing a Bitcoin application, so I am sending a lot of "toy" transactions for testing, with 0 fees.
But it seems that those take forever to get confirmed. (Right now I am waiting 45 minutes ...
4
votes
2answers
2k views
How does SatoshiDice operate with 0 confirmations?
I understand they use your bet as an input, but what does that mean and how do they do it? Can they use the standard bitcoind as a server against which to run the API from?
6
votes
3answers
250 views
Can I spend a coin sent to myself before it confirms?
If I spend the entire balance in my wallet to another address in my own wallet, do I need to wait until it gets one confirmation in order to spend it, or does the client know it is my own funds and ...
7
votes
2answers
430 views
Why does blockchain.info report “Estimated Confirmation time” not as 10 minutes?
Currently, it is a timer which counts down from 10 minutes starting when the transaction is first seen. When the timer reaches 0 minutes, it switches to "Unknown / Never."
It is my understanding ...
6
votes
2answers
366 views
What's the longest chain of orphan blocks? (How many confirmations have been necessary?)
I believe my two title questions are the same (are they?):
Heretofore, what is the longest chain of orphan blocks (of N blocks), such that if someone didn't wait for N+1 confirmations, they may have ...
4
votes
4answers
2k views
Will transaction confirmation time be reduced as the network size increases?
Right now it takes 6 confirmations, which takes about an hour to verify a transaction. Will the rate at which transactions confirm become faster over time?
4
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1answer
296 views
Why do mining pools require 120 confirms for a solved block before payout?
According to this question here, 6 confirmations can be considered 'secure enough'. Some pools out there also offer payout at 100 confirms but that's still substantially higher than 6.
Why is such a ...
6
votes
1answer
748 views
Why do some transactions take months to get into a block?
This page at bitcoincharts shows a list of transactions that didn't get included in a block yet. Many of them are from 2 or 3 months ago, even though they include a fee. What's going on? Why ...
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votes
1answer
93 views
Help regarding an online wallet to local wallet transaction? [duplicate]
Possible Duplicate:
Why is my client software not receiving bitcoins?
I use an online wallet most of the time but that was recently hacked. How I have yet to determine.
Anyways, I have ...
5
votes
1answer
319 views
How has the problem of waiting for confirmations been eradicated?
On the bitcointalk forum, evoorhees wrote:
For a long time people said the "waiting for six confirmations" was a
significant drawback, but most people understand that problem has been
almost ...
2
votes
1answer
563 views
Checking pending (not yet in the blockchain) transactions
Is there a service (like Blockexplorer) that shows pending transactions that have not (yet?) been included in the block chain?
7
votes
2answers
153 views
Is the proposed “Miner Promise” method of accepting 0-confirmation transactions safe?
This thread proposes a method for miners to promise "that their next block/s will contain a specific transaction", and/or that "they won't mine a conflicting transaction".
If adopted by a large ...
1
vote
1answer
198 views
Why I haven't received my transfer from BTCGuild? [duplicate]
Possible Duplicate:
How long does it take to receive bitcoins?
At BTCGuild site it shows on Payout History:
2012-01-26 19:01:06 1BiNp9GmFJv1VuoudsJy8Ke79qvh6BPDzp 0.20000000
2012-01-22 ...
4
votes
1answer
147 views
Can one send bitcoind transactions that will only be valid after a certain amount of time?
The standard client only allows one to spend coins from a transaction after getting 6 confirmations (120 in case of mining rewards). Can one send bitcoind a JSON-RPC command telling it to send those ...
5
votes
1answer
331 views
Is it possible to recognize conflicting 0-confirmation transactions with the Bitcoin client or other available software?
Is there already a way to detect conflicting 0-confirmation transactions? I'm assuming at least one transaction goes to my wallet.
I would expect the client to list the transaction as conflicting but ...
8
votes
2answers
2k views
How long does it take to receive bitcoins?
I bought 1.25 BTC but after 2 days I see nothing. What is wrong?
This is the transaction.
Also, I went to freebitcoins.appspot.com, since they claim thay they give for free 0.005 bitcoins per ...
5
votes
2answers
262 views
How to perform a double spend attack in websites that accept transactions with 0 confirmations?
To perform a Finney attack or a 51% attack I need to have lots of computational power, but in this case (a website that accepts transactions with 0 confirmations) it seems to me that I only need to ...
18
votes
1answer
3k views
What are Green Addresses?
What are Green Addresses? Is it true that they can solve the "confirmation delay" problem, and how does that work? Are there any drawbacks?
12
votes
1answer
529 views
What happens if my transaction is not accepted because I did not pay fees?
I was reading this thread about a client fork that does not force transaction fees and I noticed the big red warning saying that some coins might get lost if I am not careful. What does this mean? ...
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votes
1answer
3k views
Bitcoin Client says transaction is unconfirmed for 2 days now [duplicate]
Possible Duplicate:
How to debug a long “0/unconfirmed” status in the bitcoin client?
I made a transaction two days ago, but blockexplorer.com doesn't show the recipient ...
9
votes
3answers
437 views
What can be done to mitigate the risk of a Finney-attack?
Related Question: Would a reduced block generation time make the Finney attack more difficult?
I understand that the Finney-attack is the main reason why accepting a zero-confirmation transaction ...
9
votes
1answer
222 views
How do Bitcoin clients determine the number of confirmations a transaction has?
The protocol specification doesn't seem to address this.
5
votes
1answer
224 views
Why does the Bitcoin client require at least one confirmation before I can spend?
If I accept bitcoin for payment, provide a new address for each payment and make it clear to payers that I consider payment complete only after waiting the ~10 minutes for a confirmation, is there a ...
14
votes
3answers
813 views
Has there ever been a successful double spend attack on the Bitcoin network? If not, is it really necessary to wait for confirmations?
There is a lot of concern about waiting for confirmations to avoid a double spend attack, but has there ever actually been a double spend attack?
It seems to be that there are two types of double ...
16
votes
5answers
715 views
How to accept bitcoin payments at a real world store?
From what I understand, there are some requirements for using bitcoins at a physical store:
Both the store owner and the client must have Internet access
The client must have a cellphone or a laptop ...
20
votes
2answers
2k views
What are bitcoin “confirmations”?
When I receive bitcoins I see a certain number of "confirmations" in the client. What do these mean? Why do most sites make me wait for 6 "confirmations" before a purchase will go through?
