Questions tagged [unconfirmed-transactions]
Transactions that have not yet been included in a block.
584
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165
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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 ...
- 1,939
45
votes
10
answers
195k
views
How to unstuck a low-fee transaction with blockchain.info?
I've sent a transaction from blockchain.info, but accidentally included too little fee. What can I do to cancel the transaction or speed up the transaction's confirmation?
This is a complementary ...
- 72.6k
40
votes
2
answers
36k
views
Do unconfirmed transactions expire?
Do they just sit there unconfirmed (e.g. when you be evil and don't pay a tx fee) forever? Or do they get deleted after a few days?
- 2,704
34
votes
3
answers
18k
views
How do transactions leave the memory pool?
How does my bitcoin core client know when to drop a transaction from the memory pool?
Is it as simple as a specific period of time?
- 2,968
22
votes
4
answers
116k
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?
- 373
21
votes
2
answers
43k
views
Is it possible to cancel an unconfirmed transaction?
If you submit a transaction to the network but it hasn't yet be confirmed by a block, is it possible to cancel this transaction?
- 11.8k
21
votes
1
answer
599
views
Have any SPV users lost money because they accepted forged bitcoins?
I'm making a list of real-life examples of occasions where bitcoins were lost to various known attacks. One of these known attacks is that lightweight (SPV) wallets can't verify whether a transaction ...
- 11.8k
14
votes
6
answers
7k
views
So I mined a block, but why would other nodes accept my mined block?
When a miner finds a hash and is thus able to confirm a block of transactions, that miner will then broadcast the confirmation (block?) to the other Bitcoin nodes so that it can be added to the ...
- 405
14
votes
1
answer
2k
views
13
votes
1
answer
8k
views
Replace-by-Fee vs Child-pays-for-Parent?
Both RBF and CPFP attempt to solve the problem of transactions not confirming because of an insufficient fee. What are the pros/cons of using one vs the other?
Are both currently functional and ...
- 14k
13
votes
5
answers
17k
views
Is it possible to add a miner's fee after you send your bitcoins?
I accidentally sent a transaction without a miner's fee and I need it to clear as soon as possible. But, as far as I can tell it's going to take days if it goes through at all. Is there any way that I ...
- 131
13
votes
2
answers
3k
views
Can someone outline the full pros/cons of the various Replace-By-Fee proposals?
I've done some research myself, but I find that I'm either biased myself, or my sources themselves are biased. Does anyone have an objective analysis of the various proposals and their advantages/...
- 716
12
votes
4
answers
29k
views
How to unstuck a low-fee transaction with Electrum?
I've sent a transaction with Electrum, but accidentally included too little fee. What can I do to speed up the transaction's confirmation or to replace it?
This is a complementary question to Why is ...
- 72.6k
10
votes
2
answers
7k
views
Do unconfirmed transactions expire after some time?
Sometimes confirmation process is very slow. I think that is because of the price of the fee. In that time, is it possible to cancel the unconfirmed transaction and re-send with higher transaction fee?...
- 1,915
9
votes
3
answers
2k
views
What (if anything) in the bitcoin protocol prevents bias against certain accounts?
The bitcoin protocol allows miners to choose which transactions to include when they create a block. They can't include any inauthentic transactions, but to allow for an open market of transaction ...
- 93
9
votes
1
answer
6k
views
Is it possible to view unconfirmed transactions with the bitcoin client?
This site shows you unconfirmed bitcoin transactions:
https://blockchain.info/unconfirmed-transactions
As I understand it, these unconfirmed transactions are received and rebroadcast by every bitcoin ...
- 335
9
votes
3
answers
9k
views
How can an unconfirmed transaction be removed from the memory pool?
Using Bitcoind and Json-RPC, how can I remove an unconfirmed transaction from the memory pool?
The scenario being that I want to remove the unconfirmed transaction because it's not getting confirmed, ...
- 1,027
8
votes
3
answers
14k
views
What does "lock time" mean?
I got a transaction that is still not confirmed for about one week, and I can see a field called "Lock Time" that says:
Lock Time Block: 419382
https://blockchain.info/en/tx/...
- 83
8
votes
2
answers
448
views
Spending output of a low-fee transaction by following with higher-fee transaction
Suppose I broadcast a transaction A with very low (or zero) fee. Normally, it would take a long time to confirm. Suppose, then I broadcast another transaction B that spends a (yet unconfirmed) output ...
8
votes
1
answer
15k
views
How do you apply "-zapwallettxes" on Windows?
On May 27 I tried to sell some Bitcoins(for the first time). Since that day the transaction is in the status "unconfirmed". The amount is booked from my wallet, but isn't booked to my bank account.
...
- 81
8
votes
1
answer
687
views
What is the largest number of blocks a transaction has ever waited for confirmation?
What is the largest number of blocks a transaction has ever waited before eventual confirmation?
Please exclude:
Transactions with no fee
Transactions delayed because of unconfirmed inputs
...
- 373
8
votes
2
answers
927
views
How does it contribute to the Bitcoin network when I run a node with a bigger than default mempool?
Lately, when the blockspace demand outstrips the default mempool size and the dynamic minimum feerate of nodes rises above the minimum transaction feerate, I often see the suggestion to simply ...
- 72.6k
8
votes
2
answers
2k
views
What happens to transactions in the mempool when their parent transaction expires?
I was just reading the Coin Metrics Newsletter #53, and it included a section about the recent mempool congestion. After mentioning transactions that got evicted due to the network's queue of ...
- 72.6k
7
votes
1
answer
539
views
Why doesn't the protocol allow unconfirmed transactions to expire at a given height?
Transactions with low fees may remain in the mempool for as long as 14 days. This indeterminism is a source of confusion for users and wallets. It's not possible to cause a transaction in the mempool ...
- 331
7
votes
2
answers
2k
views
How does an SPV node verify an unconfirmed transaction?
Alice pays Bob 1 BTC with a simple pay-to-address type transaction. Three seconds after Alice broadcasts her transaction, Bob's Simplified Payment Verification (SPV) wallet displays a message saying ...
- 2,321
7
votes
0
answers
27k
views
Blockchain - How can I cancel my blockchain transaction, unconfirmed after +1 day [duplicate]
I am using blockchain.info.
I have made a bitcoin transaction of 4.79 BTC to the address 1DWaEfPbcKQvjMi9D9eNMrVRQzWiSLVvaS. (exchanger)
You can see the transaction at https://blockchain.info/tx/...
- 71
6
votes
1
answer
2k
views
Requirements to accept and send SegWit transactions?
I roughly understand how SegWit works, but not the details, got a few practical questions.
If I understood correctly there are separate 'SegWit addresses'. How does that work, do they look like ...
- 1,031
6
votes
2
answers
3k
views
How to remove unconfirmed, non-existent transaction from QT wallet [duplicate]
I transferred 10 btc from my Coinbase acct to my wallet. The transaction appears twice in my wallet, one went right through and confirmed within minutes, the other has 0 confirmations (after 2 weeks),...
- 61
6
votes
1
answer
249
views
Bitcoin.conf setting for CPFP - how can I enable longer 'chains' of unconfirmed transactions?
I often receive an -32700 'Insufficient Funds' error when attempting to create 'child pays for parent' (CPFP) transactions using unconfirmed change output. This can be problematic since it can prevent ...
- 182
6
votes
1
answer
502
views
Spending own generated unconfirmed change in the v.0.9.0 era
Reading about spending own generated unconfirmed change some time ago I stumbled upon this reddit thread that convinced me that doing so is a really bad idea and could prove catastrophic for any ...
- 1,366
6
votes
1
answer
433
views
Can an unconfirmed transaction fall under the radar?
Something very peculiar has happened with a transaction and I would like to understand what network conditions can possibly be the cause of this.
I transferred about 150mBTC from my Android wallet ...
- 1,524
5
votes
2
answers
679
views
Are Micropayment channels still subject to malleability after BIP65?
After BIP 65, are simple, unidirectional, MPC still subject to transaction malleability?
More specifically:
Is the payee at risk because of malleability? If yes, how? (as far as I understood, the ...
- 681
5
votes
3
answers
2k
views
Replaceable transaction or Non-replaceable. How can I identify it from raw transaction?
I created two transactions on Electrum Mac client. The first tranaction is replaceable and the other is non-Replaceable. The followings are the results of get-rawtransaction of the the two ...
- 1,915
5
votes
2
answers
2k
views
Where are transactions to be confirmed stored?
When a bitcoin client sends a transaction to its connecting full nodes, before that transaction is confirmed, where is it stored? on all full nodes?
- 51
5
votes
2
answers
508
views
When does Bitcoin Core allow you to "Abandon transaction"?
Right-clicking on an unconfirmed transaction pops up a contextual menu that has the option "Abandon transaction". It is usually grayed out. How much time needs to pass for Bitcoin Core to ...
- 4,556
5
votes
1
answer
11k
views
What is the meaning of "Position in mempool" for a transaction?
I am using Electrum as my wallet and when I am receiving a transaction, I see an attribute with the name "Position in mempool" and the value is "8.61 MB from tip". Since the ...
- 53
5
votes
2
answers
2k
views
Should I increase my mempool size to accomodate temporary crisis?
I am seeing 68k unconfirmed transactions on blockchain.info. My own bitcoind (v0.13.0) node has 49k transactions in its mempool with memory usage currently at 230mb. Knowing that the memory cap is ...
- 1,524
5
votes
4
answers
357
views
What technical properties does a confirmed Tx have that an unconfirmed Tx does not?
From a user perspective, each block confirmation reduces the probability that a transaction payment will be reversed.
However from the perspective of the software, what happens when a transaction is ...
- 4,992
5
votes
1
answer
7k
views
Transactions seen by peers, but not confirming
I have an old MultiBit wallet (v. 05.16) and within the last month I have experienced delays when transferring bitcoin. Some transfers have been seen by 2 peers and some by 6 peers, but none have ...
- 59
5
votes
1
answer
2k
views
Can I revert a transaction by removing it from the receiver's mempool?
I accidentally sent a payment from my blockchain.info address to my Bitcoin Core address with a really small fee (5 satoshi/byte). The transaction is still unconfirmed, for 4 days now.
I heard Bitcoin ...
- 151
5
votes
1
answer
7k
views
How can I unstuck a transaction sent from Mycelium?
My transaction has been unconfirmed for more than a week.
I had a normal transaction fee (not low).
The amount of the transaction was not small >0.5btc.
The inputs were not unconfirmed outputs.
The ...
- 51
5
votes
1
answer
3k
views
Unconfirmed transaction for 2 days despite network fees, rescans and redownload
I made a transaction 2 days ago, (using BitcoinQT 0.8.1-beta on MacOS X) that didn't propagate. I can't find the transaction on blockexplorer or blockchain.info (or anywhere else for that matter) yet. ...
- 175
4
votes
2
answers
735
views
Can RBF be used to change the value of a transaction?
I understand that we can use RBF Protocol to replace a transaction with higher fees to get the transaction confirmed faster.
However, is it possible to use RBF to change the value of the transaction, ...
4
votes
2
answers
3k
views
What is the longest time a transaction has been in limbo for?
What is the longest time a transaction has been in limbo for in Bitcoin?
- 11k
4
votes
2
answers
2k
views
Coinbase to Block Chain Transfer Delay
I recently sent a friend of mine around $950 in BTC from Coinbase to his BTC wallet on BlockChain.info.
The transaction is showing up as completed in my account, but he claims he has not received the ...
- 41
4
votes
2
answers
773
views
bitcoind getrawmempool without downloading the full blockchain
I'm running bitcoind from a small virtual machine on digitialocean.
I'm interested only in looking at the new transactions in bitcoind getrawmempool
Is there a way to get these transactions without ...
- 173
4
votes
2
answers
298
views
spending unconfirmed utxos which exist in the tail of mempool queue
I have some unconfirmed utxos with: sat_per_vbyte=1, which probably exist in the tail of the mempool queue, e.g. 22300/22385. They are being kept in: "unconfirmed" since 3 months ago. And ...
- 143
4
votes
2
answers
2k
views
It's possible to spend a BTC without fee to forge a payment?
I would like to know if it is possible to make a transaction without fee (probably this transaction will never be confirmed) and some time later to take this money back and spend in another ...
- 51
4
votes
2
answers
447
views
Can I see all transactions not included in a block yet?
I'm running bitcoind and would like to see which transactions I've received but haven't been included in a block yet. Is that possible, or do I need to run special mining software to see that?
- 2,819
4
votes
2
answers
720
views
Why is the transaction priority removed?
As far as I know, in the earlier version of Bitcoin, there was a mechanism about transaction priorities. However, it has been removed (or not being taken into account anymore) and now the only ...
- 337