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Bitcoin => Bitcoin Technical Support => Topic started by: BabyBandit on December 21, 2023, 03:59:02 AM



Title: Sometimes when I send BTC and look it on Blockchair it comes up at two tx.
Post by: BabyBandit on December 21, 2023, 03:59:02 AM
Hi technical crypto-pro's. I was sending some coins some days ago and when I checked at Blockchair the estimate time for it to be confirmed i noticed something strange.
I did send 0.0015BTC but when I looked at Blockchair it seems like I did send it two times, but I didn't and after some days they corrected it. But how can this happens?
That one transaction can show up as you did two transactions? I almost had a very little panic first but when I logged in to my wallet everything was fine. But still very strange... or maybe this happens time to time?
I upload a picture so you can understand easier.




https://www.talkimg.com/images/2023/12/21/IAS1m.png


Title: Re: Sometimes when I send BTC and look it on Blockchair it comes up at two tx.
Post by: ranochigo on December 21, 2023, 04:18:44 AM
Looks like a glitch, the transaction checks out and there is only supposed to be one transaction being shown on the address. Probably just a bug that is specific to Blockchair. The next time this happens, try clearing your cache and see if it helps.


Title: Re: Sometimes when I send BTC and look it on Blockchair it comes up at two tx.
Post by: nc50lc on December 21, 2023, 05:02:18 AM
Hi your technical pro's. I was sending some coins some days ago and when I checked at Blockchair the estimate time for it to be confirmed i noticed something strange.
I did send 0.0015BTC but when I looked at Blockchair it seems like I did send it two times, but I didn't and after some days they corrected it. But how can this happens?
Definitely a bug in Blockchair's Blockexplorer.

Notice that the TXID are the same? It means that its the same transaction.
In the blockchain, the chance of two different transactions to produce the same TXID is 2^256 (nearly impossible to happen) which is also a collision in SHA256.
Since the two transaction's TXID are the same, it means that Blockchair blockexplorer just had it duplicated due to a bug in their database or some sort.


Title: Re: Sometimes when I send BTC and look it on Blockchair it comes up at two tx.
Post by: BabyBandit on December 21, 2023, 05:09:58 AM
Hi your technical pro's. I was sending some coins some days ago and when I checked at Blockchair the estimate time for it to be confirmed i noticed something strange.
I did send 0.0015BTC but when I looked at Blockchair it seems like I did send it two times, but I didn't and after some days they corrected it. But how can this happens?
Definitely a bug in Blockchair's Blockexplorer.

Notice that the TXID are the same? It means that its the same transaction.
In the blockchain, the chance of two different transactions to produce the same TXID is 2^256 (nearly impossible to happen) which is also a collision in SHA256.
Since the two transaction's TXID are the same, it means that Blockchair blockexplorer just had it duplicated due to a bug in their database or some sort.

Yeah I noticed the TXID was the same that's made me think it was a bug, but I was not sure because this technical stuff can I nothing about.  :)


Looks like a glitch, the transaction checks out and there is only supposed to be one transaction being shown on the address. Probably just a bug that is specific to Blockchair. The next time this happens, try clearing your cache and see if it helps.

Thank you for that advice. Will sure try it if it happens again.