120
votes
Why is my transaction not getting confirmed and what can I do about it?
How Bitcoin Mining Works
Bitcoin transactions are mined (processed) by Miners, and Miners want to benefit from their work. By mining transactions with higher fees, they make more money. Some miners ...
- 1,453
38
votes
Accepted
Can bitcoin exist without miners?
if in the coming years the difficulty increases so much that mining is no longer profitable
That's not really possible. The mining power is set so that the miners need 10 minutes in average to mine a ...
- 2,067
31
votes
Bitcoin successfully deducted on sender wallet but did not reach receiver wallet
It's not completely clear what the situation is, but from what I gather it seems that you're the sender and the recipient is not acknowledging a payment you have sent. Given that you have already ...
- 68.6k
25
votes
Why is my transaction not getting confirmed and what can I do about it?
Here is a guide for as many wallets as I could figure out how to perform an RBF with. This is adapted from my bitcointalk post: https://bitcointalk.org/index.php?topic=1802212.0
What is a "Stuck" ...
- 65.6k
25
votes
Why is my transaction not getting confirmed and what can I do about it?
In the case that your fee is too low: Now that child-pays-for-parent has been merged, you(or any of the recipients of your unconfirmed transaction) could spend the Bitcoin received and the fee ...
- 1,044
15
votes
Accepted
With 100% segwit transactions, what would be the max number of transaction confirmation possible on a block?
Very interesting question, let's see what the smallest transaction we can build is. For it to be minimal it has to be a single input and a single output. The non-segwit part would look something like ...
- 9,044
13
votes
Why is my transaction not getting confirmed and what can I do about it?
The other answers cover most useful information already, I'd like to add one point though:
The fee estimation of most wallets has significantly improved since blocks have gotten full.
If you're ...
- 68.6k
13
votes
Accepted
Shortest and Longest block interval time ever recorded in Bitcoin
(This data is current through block 535276.)
Based on block timestamps (which do not have to be accurate), the longest difference between successive blocks is 463160 seconds (5 days, 8 hours, 39 ...
- 22.9k
9
votes
What is the "confirmation" field in a block?
Blocks in Bitcoin, as they exist in the blockchain, don't actually contain a confirmation field. When you query for a block in bitcoin-rpc or similar, additional information is added to the block ...
- 186
8
votes
Why is my transaction not getting confirmed and what can I do about it?
If you are using Electrum, there is no equivalent to -zapwallettxes. The closest thing you can do is to restore your wallet from a seed. This will wipe your client of any unconfirmed transactions.
...
- 29k
7
votes
Accepted
When we can agree on mempool sorting order, we can just confirm first n-transactions that are at least 10 mins old. What's missing?
Your answer assumes different nodes can have a consistent view of the mempool. If that were the case, we wouldn't need a blockchain at all, whose sole purpose is establishing consistency between ...
- 94.1k
6
votes
Why do nodes trust other nodes to approve their transactions?
I know that the blockchain technologie works so well, because
everybody has basically a copy of the last ledger.
Yes, every full bitcoin node has a copy of the blockchain (aka ledger).
Therefore,...
- 2,254
6
votes
Why can bitcoins never be refunded unless the receiver agrees to send back the money?
Bitcoin is like cash: You don't use an intermediary. If you send money to someone, they got it. The only way you can get is back is to make them hand it to you. If there is no intermediary, you can't ...
- 3,184
6
votes
Accepted
Why doesn't BTC reward miners for confirmations, too?
I'm not 100% sure I've understood your suggestion, in part because you've used some non-standard terminology.
But it looks like this is actually two suggestions rolled into one.
The first is a ...
- 19.7k
5
votes
Accepted
Why are there so many confirmations?
The number of confirmations indicates under how many blocks your transaction is buried. The more the confirmations, the more your transaction is secure from double-spending attacks. So the ...
- 5,142
5
votes
Accepted
How do you calculate a reasonable transaction fee?
See https://bitcoinfees.21.co/ for mempool size and tx fee. This will suggest fee in satoshi/byte depending on current network conditions.
If you are looking to exact fee in BTC for spending from ...
- 1,977
5
votes
Accepted
How would one monitor an address for a transaction and 1 confirmation in PHP?
Cron Jobs and 3rd Party API:
You could try with cron jobs, but I wouldn't run it every second, that's rather exhaustive. Maybe every 5 or 10 minutes, and then have it check the current total ...
- 5,388
5
votes
Accepted
Does desktop wallet need to be online for the coins to mature?
No, your wallet does not have to be online. Maturity depends on the block number in which a transaction was included into the blockchain.
5
votes
Does desktop wallet need to be online for the coins to mature?
Receiving bitcoins is a completely passive process: The information of the received transaction gets added to the blockchain enabling you to reference it in the future when you want to spend the ...
- 68.6k
5
votes
What is the "confirmation" field in a block?
The concept of confirmation in Bitcoin is a measure for how deeply buried a block or transaction is in the blockchain. It measures how many blocks on top there are. More means the block or transaction ...
- 94.1k
5
votes
Accepted
Do transactions with old UTXOs take longer to confirm?
No.
The miners use Bitcoin Core or similar full node software to determine which transactions are valid and suitable for inclusion in a block. Bitcoin Core maintains a database of all unspent UXTOs. ...
- 22.9k
5
votes
Accepted
What is the longest time a transaction has been in limbo for?
This question cannot be answered reliably.
The only part of Bitcoin that is publicly known is the blockchain. The transactions that are confirmed are on the blockchain, that is shared online.
The ...
- 2,655
5
votes
Accepted
I have received £46,21745 in my Bitcoin account. Should I confirm it?
I don't have any Bitcoin account [...] but I got an email that I have received £46,21745 in my account
It is a lie. There's no money. It is a trick by criminals who will
later ask you to pay some ...
- 22.2k
4
votes
What happens if your transaction is never confirmed?
Whether a sender and recipient can rely on a transaction is a probabilistic matter, but a transaction's state is binary in regard to the current chain tip. Either, the transaction is confirmed and the ...
- 68.6k
4
votes
Accepted
Transaction marked as "Newly generated coins" on Blockchain.info
No inputs means that the coins are coming from a coinbase transaction, that is, they were only moved "once", when they were created.
Transactions will have different numbers of confirmations based ...
- 211
4
votes
Accepted
What technical properties does a confirmed Tx have that an unconfirmed Tx does not?
when we speak about specific transaction: no. The unconfirmed transaction looks exactly the same as the same transaction with 1,2.. confirmations.
yes. There are 3 types of transaction: confirmed, ...
- 149
4
votes
Accepted
Confirm own incoming transactions
This might only be an issue with the terminology, but when a transaction is "mined", it is included in a block. You could do that of course, if you were contributing blocks to the Bitcoin network, but ...
- 68.6k
4
votes
How do I know how many confirmations a transaction has?
As you can see at the bottom of your screenshot, or on any block explorer similar
(https://blockchain.info/tx/2daf1bea238137e5db00cd12074a93f181bf86a759f1963fd92197671f32a463),
you can see that it ...
- 11.6k
4
votes
Accepted
Why maturity rule on coinbase tx requires too many confirmations w.r.t an arbitrary tx?
If a normal tx is honest, has 6 confirmations, and there happens to be a reorg 6 blocks deep, the tx will just go back to the floating pool, and join one of the next blocks, with no harm done to any ...
- 19.7k
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