Questions tagged [confirmations]

Confirmations correspond to the number of blocks that are dependent on a given transaction. This includes the block containing that transaction and all blocks after it in the blockchain. The more confirmations a transaction has, the more likely is it that it will remain in the blockchain permanently.

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Can I use the Bitcoin Core CLI to learn the block height at which a transaction was mined?

I am interested in figuring out at what height a transaction was mined, but I cannot find the right command to extract this information. Perhaps it's not possible? My Bitcoin Core was not involved as ...
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2 answers
9k views

How do I know how many confirmations a transaction has?

This is my first transaction and it's been since yesterday that I sent it. The website said wait for 4 confirmations then check email, but I haven't gotten any email so I don't know if it's gone ...
2 votes
1 answer
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How can I accelerate confirmations in ledger nano s?

I am using Ledger Nano S hardware wallet to store my bitcoins. Last week, for an experiment, I decided to send bitcoins to hitbtc currency exchange with zero btc fees. I was wondering how many hours ...
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1 answer
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Is it correct to differentiate between a validated bitcoin transaction and a confirmed bitcoin transaction?

From my understanding, a transaction is first 'validated' by nodes once a transaction is propagated - so in the early stages. These validated, but unconfirmed, transactions are then collected by ...
1 vote
2 answers
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What is the point of confirming a bitcoin transaction more than once?

Given that the bitcoin blockchain is immutable, why is there a need to have more than six confirmations for the same transaction? I was under the impression that a bitcoin transaction is 'official' ...
0 votes
1 answer
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Can Finney attacks only be made by miners?

I read this article about double spending attacks. The article has a sentence that goes like this: "Finney attacks can only be executed by miners, and are therefore fairly technical and obscure.&...
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what kind of a double spend attack is a career attack?

there is an article that name different type of double spent attach like "Several variations of attacks could allow miners with bad intentions to double spend. Included are the Finney attack, ...
1 vote
4 answers
3k views

Transaction marked as "Newly generated coins" on Blockchain.info

On blockchain.info I saw a transaction labeled as "No inputs (newly generated coins)". Are these new coins generated from mining? How come that such a transaction can have 30 confirmations, while ...
1 vote
2 answers
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What is the downside of having a default setting in which nodes will invalidate blocks that comprise a surprise reorg?

Suppose that suddenly, out of nowhere, a longest-chain appears that reorgs the last 15 blocks. Such an attack could be accomplished from time-to-time even by a minority attacker who is either lucky ...
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what is the confirmation section in the block info?

in the details of a bitcoin block there's a section called block confirmation (which is different than transaction confirmation), first i thought it was the number of the blocks that are created after ...
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Okay so i sent btc from another wallet to my blockchain wallet since yesterday. It’s been over 16hours now and I haven’t received the btc in my wallet

I sent btc from my bitnob wallet to my newley created blockchain address. It’s been over 16 hours with 115 confirmations and yet the money isn’t in my blockchain walllet. Help anyone?
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It takes longer to transact your money Bitcoin! Why?

When it says transactions takes up to 10 minutes, Why do it take more then two minutes when you transfer money into another account
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1 answer
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Is it safe to close a wallet and switch off the computer when there are only one or two confirmations?

This happens every time I have to send Bitcoin somewhere - a small clock symbol opens up in the electrum wallet, and the colour slowly changes from orange to friendlier shades of green as the number ...
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1 answer
373 views

Why is this burn address starting to get confirmations?

Can anyone explain why the burn address 1111111111111111111114oLvT2 started receiving confirmations only on 8th June? 1st transaction is 11yrs? I thought a burn address doesn't get any confirmations, ...
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1 answer
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I have received £46,21745 in my Bitcoin account. Should I confirm it?

I don't have a Bitcoin account (I never made one), but I got an email 📨 that I have received £46,21745 in my account and my first payment is ready for my confirmation. I would like to know how ...
2 votes
2 answers
553 views

Incoming transaction has been marked as pending since 2013. How can I retrieve it?

I requested BTC from someone back in 2013. Its been in pending status ever since. It has nearly 500,000 confirmations. The value of transaction when initiated was only $200 or so. Now the value is ...
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1 answer
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How to check coins & confirmations amount programmtically without third party site

How do I check the amount of coins are in a crypto wallet? And how do I check the confirmations? Is this process different for each cryptocurrency? I'd like to check these without having to rely on a ...
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2 answers
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Bitcoin: How does Proof of Work and single transactions align?

I'm reading papers since hours and still don't get one thing: A bitcoin transaction is an information like "Bob sends 2 BTC to Alice". This message is signed with Bobs private key and needs ...
2 votes
2 answers
96 views

Cryptocurrency acceptance

I heard that the recommended waiting confirmation time for a bitcoin transaction is 6 blocks/ 1 hour. So a shop which lets its customer to pay in bitcoin without any waiting for confirmation would ...
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1 answer
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Why is the Bitcoin blockchain designed so that a block can be unconfirmed?

After a transaction is confirmed and included in a block, it is said to have a depth (confirmation) of one. However I've read that many companies require "multiple" confirmations (up to 6) ...
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1 answer
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Sent two btc transacton to payeer wallet less than the mnmum deposit,neither where credited

recently sent to my payeer wallet a 0.0002 btc transaction which is less than the 0.0005 minium btc deposit, then did a second transacton of 0.0003 btc thnking that it will sums up. Both transaction ...
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1 answer
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mSigna: Signed, send, but 0 confs despite high fee (0.001 BTC) [duplicate]

Tried to send my first tx from mSigna today. Receiving was painless, but the send does not get included into a block since half a day, and dozens of blocks passed. I unlocked the account, created ...
7 votes
1 answer
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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?
162 votes
10 answers
384k views

Why is my transaction not getting confirmed and what can I do about it?

I sent a transaction without (or with an exceptionally small) transaction fee using extremely small or unconfirmed inputs while the stars were not standing right. For whatever reason, I have been ...
3 votes
2 answers
497 views

Altcoin confirmations and safety - wait ~6 confirmations, or ~1 hour?

The general consensus in the Bitcoin network is to wait for 6 confirmations or 1 hour on a transaction before it can be considered completely irreversible. However, when it comes to altcoins that use ...
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2 answers
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Does Bitcoin "confirmations" have nothing to do with fullnodes -- only miners?

Roughly every 10 minutes, a new "block" is created. If Joe sends Sue a satoshi, it will be at least 9 minutes and 59 seconds until they get 1 confirmation (as I understand it). Then, ...
22 votes
4 answers
112k views

What happens if your transaction is never confirmed?

If I have a low amount and don't include a fee, the transaction takes forever to get confirmed. What happens if it never gets confirmed? Can the wallet that I sent it to still spend the money?
2 votes
3 answers
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Why do nodes trust other nodes to approve their transactions?

I know that the blockchain technology works so well, because everybody has basically a copy of the last ledger. Therefore, if a transaction happens, everybody inside the network has to "approve&...
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2 answers
632 views

Can I earn mining rewards by mining my own transactions?

Lets say, I have a proper industrial grade mining setup. I have two accounts. I transfer some bitcoins back and forth between two accounts. Both accounts are using the same machine or different ...
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2 answers
196 views

I made mistake sending Bitcoin to old generated address in nairaex ...the transaction still writing unspent...how can I get my Bitcoin back

I got 22 confirmation for Bitcoin not up 50$ and still unspent ,ow can I get it reverse back ,it more than 4hours
58 votes
2 answers
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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?
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1 answer
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How many times a single transaction can be included into different blocks?

I would like to know is there a limit after which a miner cannot include a transaction into his block.
121 votes
5 answers
22k views

Why is 6 the number of confirms that is considered secure?

Why is 6 is the number of confirmations that is considered secure? I haven't found any mathematical explanation or otherwise that explains why it is 6 and not 5 or 7. Is there a historical reason for ...
3 votes
1 answer
1k views

Do Miners get a reward for re-confirming blocks?

As far as I know, to ensure double-spending didn't happened and also for other security reasons, there is minimum number of confirmations that a transaction should have to be accepted. That value is ...
3 votes
1 answer
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How to configure bitcoind to wait for X confirmations to make the payment submitted

I'm using bitcoind for an ecommerce website. Walletnotify setting in bitcoin.conf only fires twice (once the payment appears on the network and then when the payment is confimed the first time by a ...
1 vote
1 answer
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How the bitcoin network solves the double-spending problem by adding all the transactions that happened at the same time into one block

According to my research, I understand if person A sends 2 BTC to person B and at the same time person A sends the same input to himself before the input is considered as spent. So, now there will be ...
39 votes
2 answers
10k 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?
4 votes
3 answers
413 views

Why wait for several confirmations before shipping?

Suppose customers pay me bitcoins for their purchases. As far as I understand, I could check block chain that the proper payment amount has been made to the address I generate for each customer, and ...
2 votes
2 answers
152 views

Why would more confirmations help in a 51% attack scenario?

After the 51% attack on Bitcoin Gold. The developers of the cryptocurrency recommended the exchanges to increase the confirmations. I don't understand why increasing the confirmations would help if ...
0 votes
2 answers
341 views

How to get both confirmed and unconfirmed transaction details of foreign(non-wallet) addresses from bitcoin-node server?

How to get both confirmed and unconfirmed transaction details of foreign(non-wallet) addresses from bitcoin-node server? Actually i have generated the addresses using third party library and sent some ...
1 vote
2 answers
71 views

Why does a thin node need to know if a transaction is present in specific block's merkle tree?

I understand what a merkle root is and how merkle proofs work. It's all about thin nodes checking whether a specific transaction ID is in a specific block. So, thin node says: I have a transaction ID -...
19 votes
2 answers
7k 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? ...
4 votes
1 answer
747 views

Why can bitcoins never be refunded unless the receiver agrees to send back the money?

I have used a number of ecurrencies and they all seem to share what I've never understood about BTC, which is that once it is sent, it's gone. Often BTC are sent but legally should be refunded, but ...
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1 answer
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Why doesn't BTC reward miners for confirmations, too?

Currently as far as I know when a miner discovers enough 0s, he broadcasts his solution to the network in order to win the coins. While, he broadcasts his solution (which gave him the 0s), he also ...
1 vote
1 answer
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Where does "Included in Block" value comes from?

I was exploring transactions inside of a blockchain using this site, and inside of a transaction I noticed there is attribute called Included in Block and its description is: block this transaction ...
2 votes
1 answer
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Is history reversal a concern if the absence of attackers is assumed?

As described in the Bitcoin paper, the Bitcoin network may temporarily diverge, or "fork," as nodes may work on different blockchains. The network reconverges, however, as a node will always ...
0 votes
1 answer
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Modify the number of confirmations for an utxo to be ```safe == true``` in Bitcoin Core

I noticed that when I call listunspent on Bitcoin Core, UTXO with 0 confirmation are labeled unsafe, and thus prevented from being spent with sendtoaddress or fundrawtransaction. As soon as there's ...
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How to check if confirmation is done or not yet?

After sending Bitcoin to any address, how can I check if the transaction has at least one confirmation? Should I poll the transaction repeatedly or is there any event when confirmation is made.
1 vote
1 answer
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Transaction not complete for two days now

I sent bitcoins to a wallet using the QR code in order to be very sure of the address. It shows in my wallet that it has been sent. But the receiver haven't seen it in his wallet. I checked it online ...
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Why is my Bitcoin transaction not confirming today? [duplicate]

Please don't tell me that this also has something to do with this stupid Corona virus. First, it slashes the Bitcoin value in (less than) half. Then I can't order any groceries and have to sit here ...

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