Questions tagged [reverse-transaction]

Questions relating to how particular transactions can be undone or replaced.

Filter by
Sorted by
Tagged with
16
votes
7answers
33k views

Can a bitcoin transaction be reversed?

If I sent bitcoins to someone, but then want to cancel this transaction after it was already made (like a chargeback on a credit card), is this possible with Bitcoin?
36
votes
3answers
8k views

What are checkpoints?

I often read that checkpoints protect the network from a 51% attack because an attacker cannot reverse transactions made before the last checkpoint. How exactly does this checkpoint mechanism work? ...
20
votes
2answers
41k 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?
18
votes
3answers
1k views

Can a bitcoin transaction be reversed from the receiving end?

I know this seems like a duplicate of the question 'Can a bitcoin transaction be reversed?' but none of the answers there were explicit enough as they all seemed to assume reversal triggered from the ...
12
votes
3answers
128k views

How long does it take on average to receive one confirmation? Is it still reversible?

Hi! Based on your experience, how long does it take to receive one confirmation for any given transaction which has payed the standard miner's fee? Is it still reversible? Thanks!
11
votes
3answers
681 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 ...
11
votes
2answers
1k views

Double spend attack by sending higher fee transaction directly to the pools possible?

The standard client prioritizes TXs by the time of receipt, e.g. a conflicting transaction will not be relayed. This is not enforced by the network, though. Is there anything that would prevent this ...
3
votes
2answers
1k views

Is there a standard procedure for refunding Bitcoin transactions?

I work for an online retailer, and we're currently testing a Coinbase payment implementation for our checkout. One of our big concerns is being able to send a refund in the event that we're unable to ...
10
votes
1answer
2k views

Bitcoin automatically diverted to bech32 address

I sent bitcoin to an address starting 3Cn using Electrum but the blockchain viewers seem to show that it has gone to an address beginning bc1 as shown in the link below. Transaction Viewer How can ...