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https://live.blockcypher.com/btc/tx/4d45a14ee7320b97bafd550d60df1a1be524f3cfc8ca1ea6295279eeb7026aff/

Wtf. How does  it happen 😄😄😄

Probably a big mistake by whoever sent the funds.

I mean there are a lot of transactions that carried way more transaction fees than even this one, i believe there was one with something like 40+ BTC in transaction fees. It's not that uncommon these days to have transactions with fees over 0.1 BTC, without a mistake just because the fees are pretty damn high right now.

If that guy made a mistake, which he probably did, he should contact whoever mined the block which is Antpool in this case and ask for a refund.

I've seen companies offer refunds before, not sure what's Antpool's stance on this issue.

Somwone was probably drunkenly using a waller that allows hand input for fees and mistook the field. There have been cases that the pool mining the transaction returned the fee but they're certainly not obligated ro.

The reply of their representative is indeed correct--the user made the mistake personally and the company has no responsibility or whatsoever in the matter. However, it is so kind of them to still give the user his losses after what has happened on that scenario and that was pretty cool of Antpool to do since the funds were already dispersed but still they gave it to the dude. A nice ending to a horrific start, I guess.

It happens when the wallet you use to send funds don't have the feature to input the fees manually and you can't preview the fees, seems like electrum and mycelium but those two can preview the fees before sending so still it safe.
Or maybe he used some exchange that get the fees from the users balance automatically and the user can't see if the fees reach 1 BTC already.

Its likely someone who was messing around and handcrafted the TX himself. Many don't realise that the fee is always the input amount-output amount and the fee is unintentionally overpaid. Depending on who mined the transaction, they may not refund. The 2.5BTC is technically theirs.

 Well, the guy must have started the celebrating really early; the incident occurred over a week ago.
Now who's been into the whiskey?! ;)
 

Clearly just a rich guy trying to help the network right ;)

It was a mistake. he posted here in bitcointalk weeks ago.

https://bitcointalk.org/index.php?topic=1818791.0

I think this happened because he could have thought that he's placing transaction fee in the form of dollars. In such a way to get faster confirmation could have done it without understanding the representation of btc and dollar separately. The user is simply helpless, because such transaction get confirmed in a short as well getting back is tedious.

oh man i wish it wasn't just a one comment kind of topic from OP and it would have been great if he/she could explain why that happened so maybe others could learn from that mistake.

anyways that seems to be a story with a happy ending since the miner (Bitmain) paid him back
https://blockchain.info/tx/eb76fdc7a422342cc5b97c77f8e37406aefb3ec8cfbe2c00e0240138b950b768

Sure he might have started the celebration because you are the guy who took the initiative to inform the Bitmain team about this mess up and mistakes can happen when you are high or if you did not double verify .Cudos to the bitmain team for sending him back the amount even though they are not obliged to return the amount as they have already distributed among miners,why dont you join him for the booze party.  :)

Whoever sent that transaction fee that big accidentally is crying right now, lol. 2.5 bitcoin is a big deal, maybe not, if he have too much bitcoin in his wallet, and it is not a problem to him to earn that amount of bitcoin that is why maybe he put the transaction fee into 2.5 for a faster transaction, and if its true that he just accidentally sent it, then he's doomed, 2.5 bitcoin is not that easy to earn.

If this problem known by everyone who don't understand what's the problem, it would be a bad impression for cryptocurrencies, especially bitcoin. Bitcoin known as the alternative instant payment with low fee that don't need third party, if this big fee heard by the competitors, it's not good on the news.

Yeah this generally happen when you intake a large volume of Chivas Regal (https://www.chivas.com/), I am pretty sure that he would run to the miner who confirmed the transaction to refund , but it is a way to difficult for one to make them reply to you.
anyways this is hard fucked now..

That's just not true.  The fees are pretty high, but they've never been recommended over BTC0.1 and even for quick transactions they've never been over BTC0.01.

It's very confusing how people manage to make transactions with mistakes this serious, because most major wallets give you warnings if you put the transaction fee too high.  Not to mention that if you hold enough Bitcoin to make that mistake anyway, you should be able to be very careful with your Bitcoin when sending any transactions.  But then again, when there are thousands of transactions going on every hour, I suppose there always has to be someone who, by coincidence, makes such a bad mistake.

If this is the person I'm thinking about though, they were refunded by Antpool a while ago.

This. I once had that problem too when creating a raw transaction. I was so focused on experimenting that I completely messed up. Raw TX was sent where the rest of my balance was included as fee, lol. It gladly wasn't a huge amount (around 0.10BTC), but still, it hurts. I could have tried to double spend that TX, but it was useless since I would then lose more than I would gain.


It's gone. In most cases pools directly pay out everything to their miners. I don't think many pools are willing to swallow a loss just because someone else made a mistake. I however have to note that very recently someone was indeed refunded by a mining pool after adding a way too high fee. But in that case it looked more like a publicity stunt to me.

Ahuh. That he did. Came here and asked for help yet didn't bother to respond. Just that one single post of him. And he was gone.
It was xhomerx10 who took the initiative to contact Bitmain and got a favorable response. Good thing he did.

Honestly, I think it's a stupid mistake to make. Wouldn't you double or even triple check everything before sending a transaction? That's just being too careless. But yeah, it happens.

As for Bitmain, publicity stunt or not, it's a good gesture. I don't consider the motive (in this case) to matter.

There's no way that some exchange that deducts user's balance to pay fee could make a big mistake like that, I'm sure that they're using their own algorithm which is finely made and tested.  If the exchanges were calculating the fee based on its size and depending on the current recommended rate which is 200sat/b then it wouldn't surpass 0.005 as it's the recommended fee for 2000b as showed in the transaction description.

wow, that fee which is amazing, maybe he did deliberate action by giving tax 2.5 BTC, and may also be an expression of gratitude for the gift that has been given of the BTC. or maybe he made a mistake and think that he is sending 2.5 BTC. already a lot going on with the fee on 1 BTC.

This was very unfortunate mistake on the sender part - he mistakenly wanted to send 2.5 BTC and not include it as a fee.
This transaction fee had nothing to do with current high (but not that ludicrous) fee policy.
I always say: there should be hard coded limit build in every bitcoin wallet preventing you from including ridiculous fee like that.
Also I wonder if AntPool pitied him and gave his money back, even though they have no obligation to do that...

I think there was a mistake of the user send and regulate bitcoin bitcoin transaction costs, hope this does not happen again in the future

Trust me, as long as users are free to set unrestricted transaction fee it will happen sooner or later. This is not isolated incident
We know about this case only because unfortunate sender tried to seek help on bitcointalk, but think how many users sent the wrong fee and never complained about it.

True. As you say, a hard coded limit or even a notifier/warning that pops up should be included in wallets. Something like if a set max/min fee is reached, there'd at least be a warning. Then, if they still send a such a ludicrous amount of fee despite the pop-up warning, that'd just be considered a 'donation' of sorts.  ;D

Yes, they did give back 2.5 BTC. The fees were already distributed to the miners, but even so, Bitmain still decided to return the same amount, from their own pocket.

Just skimmed through the topic, that's really a generous thing for a mining pool to return the fees from their own pocket. That guy really messed up big time but was lucky this time, we should learn from this and be careful while sending manual fees.

Agreed that he's just lucky this time that the mining pool has given him back the excess fees that he accidentally sent. But just as Mining Pool said " it's not their responsibility to give back the money since it's his fault and not theirs'. Better to double check things before proceeding to what we will do.

Hardly generous, it was Antpool.  Antpool have thousands of Bitcoin to play with when they take the transaction fees and a 2.5% fee from the block rewards.  The only real reason that they would have done this is for PR purposes - if this fee problem wasn't made or going to be made public I highly doubt that they would have done it, which is why they publicly stated that they had.

Probably someone was drunk while sending the funds.
The funds sent are like 0.05 and 0.2 [ Though the tx fee is 2.5 lmao , 1st time in life i have seen such a big tx fee in this low amount

Well sometines the fees are on the high side when the mempool is flooded.  https://blockchain.info/charts/mempool-count
I once had to pay 0.01 BTC fee on a 0.2 Transaction.

But as stated this seem to be some PR stunt of Antpool

 Then I will state it was not a publicity stunt for the record.  Bitmain/Antpool would have somehow managed to count on my involvement in their scheme without my knowledge or consent.
 It's quite simple really.  An unfortunate event in which they unknowingly became involved was brought to their attention and they made the decision to remedy that situation at a cost to themselves.  To them, 2.5 BTC is a pittance; to a student, it is a fortune.  Their decision was easy to make.  Why is everyone over-thinking this?  How many newspapers picked up this story?  It wasn't on CNN... nobody called to interview me or even e-mailed or PM'd me over the matter.  If it was a publicity stunt, Bitmain failed to take advantage of it.  One would think it they had put all this forethought into the scheme they would have planned on a follow-through.

 Two words - Occam's razor


 

That's outrageous and I find it difficult to believe that one will even pay more than half a BTC as tax fees. Strange times indeed.

if this is a user error, what a honest mistake! good thing it got refunded back.  thanks for the input everyone!