FAQ: All About Unconfirmed 0 Confirmation Transaction Fee (READ before posting!)

[mitus-2]

can someone please explain me why this transaction has not be confirmed yet? https://blockchain.info/tx/946cacddf93116e4511fd5a47ab01bdb9e68679cd6a11de794fad126af3d3ec0
even if it has 0 fees:

It is smaller than 1,000 bytes.
All outputs are 0.01 BTC or larger.
Its priority is large enough (411159279*69/225)

thanks

[cr1776]

can someone please explain me why this transaction has not be confirmed yet? https://blockchain.info/tx/946cacddf93116e4511fd5a47ab01bdb9e68679cd6a11de794fad126af3d3ec0
even if it has 0 fees:

It is smaller than 1,000 bytes.
All outputs are 0.01 BTC or larger.
Its priority is large enough (411159279*69/225)

thanks

Probably because it looks like there has only been one block (maybe 2) since it was created.

It has been nearly 45 minutes since the last block.

[mitus-2]

Thanks for the answer but that's not the reason
It was created 2015-04-07 22:08:00 and now it s 2015-04-08 01:38:55
So 3 hours and half have passed

[Minnlo]

Thanks for the answer but that's not the reason
It was created 2015-04-07 22:08:00 and now it s 2015-04-08 01:38:55
So 3 hours and half have passed

And your transaction is confirmed in block 351193, 242 minutes after creation.

From my personal experience, 0 fee transaction will take quite some time (up to a few hours) to get confirmed even when it satisfies all the 3 conditions. If you need it to go through fast, it is better to include a transaction fee.

[shorena]

Thanks for the answer but that's not the reason
It was created 2015-04-07 22:08:00 and now it s 2015-04-08 01:38:55
So 3 hours and half have passed

And your transaction is confirmed in block 351193, 242 minutes after creation.

From my personal experience, 0 fee transaction will take quite some time (up to a few hours) to get confirmed even when it satisfies all the 3 conditions. If you need it to go through fast, it is better to include a transaction fee.

Yes, they take time. The reason behind this is that there is only 50KByte per block for transactions without a fee by default. Thus you are not competing for a spot within the full 1MB of a block, but for a much smaller space.

[mitus-2]

thanks for the answers. yep finally my transaction was confirmed. there were a lot of blocks with just a few transactions, before the one in which my transaction was confirmated, so to me it looks like a waste of time to wait so much.

[shorena]

thanks for the answers. yep finally my transaction was confirmed. there were a lot of blocks with just a few transactions, before the one in which my transaction was confirmated, so to me it looks like a waste of time to wait so much.

This is essentially what it boils down to. Either you want the transaction confirmed fast and pay a fee or you have a bit of time or do not care if it takes longer and can get it confirmed without paying a fee if other conditions are met.

[mitus-2]

thanks for the answers. yep finally my transaction was confirmed. there were a lot of blocks with just a few transactions, before the one in which my transaction was confirmated, so to me it looks like a waste of time to wait so much.

This is essentially what it boils down to. Either you want the transaction confirmed fast and pay a fee or you have a bit of time or do not care if it takes longer and can get it confirmed without paying a fee if other conditions are met.

I tought bitcoin protocol allowed to send transactions basically free but apparently miners don't allow that.
There is always such confusion around transactions fees

[Muhammed Zakir]

thanks for the answers. yep finally my transaction was confirmed. there were a lot of blocks with just a few transactions, before the one in which my transaction was confirmated, so to me it looks like a waste of time to wait so much.

This is essentially what it boils down to. Either you want the transaction confirmed fast and pay a fee or you have a bit of time or do not care if it takes longer and can get it confirmed without paying a fee if other conditions are met.

I tought bitcoin protocol allowed to send transactions basically free but apparently miners don't allow that.
There is always such confusion around transactions fees

You can send a zero-fee transaction but it will take some time to get confirmation. Some miners don't add transactions which have less than recommeded fee but most miners add all transactions but give priority to transactions with recommended fees.

[Muhammed Zakir]

what is the minimum and maximum duration for the transaction?

There is no minimum and maximum. However, you can take 10 minutes as minimum but it is not really true in all cases.

[a1binos]

Is there any service for manually adding a fee to a pool? Created Transaction using blockchain.info wallet... Usually it takes some fee, but in this case, it doesn't for some how... It is <0.5 kb , only 2 outputs >1 btc each and it says High Priority. But It takes 6 hours for now, and it still stays unconfirmed

[Muhammed Zakir]

Is there any service for manually adding a fee to a pool? Created Transaction using blockchain.info wallet... Usually it takes some fee, but in this case, it doesn't for some how... It is <0.5 kb , only 2 outputs >1 btc each and it says High Priority. But It takes 6 hours for now, and it still stays unconfirmed

Can you please post TXID?

P.S. You can use Blockchain.info custom spend to set a fee of your choice.

[a1binos]

Transaction id

https://blockchain.info/en/tx

[a1binos]

I used Iphone application, it doesn't include option for any fees at all. But usually it adds 0.0001 fee. On a computer-browser version my fee is set to 0.001

[a1binos]

Thanks! It confirmed now! Muhammed Zakir, It was you?

[Muhammed Zakir]

Transaction id

https://blockchain.info/tx/fc0ea588be89003d64fde121f2a48f31b1a4435793d601a0745c6c118f6c31cf

It is confirmed. Now it has 3 confirmations. It took time to confirm because you didn't add any fees.

I used Iphone application, it doesn't include option for any fees at all. But usually it adds 0.0001 fee. On a computer-browser version my fee is set to 0.001

When I used to use Blockchain.info, fee was added. I don't know why it didn't for you. There is a change Blockchain.info didn't add it because of the high priority* of transaction or there maybe some problems.

* I didn't calculate priority of the transaction.

Edit:

Thanks! It confirmed now! Muhammed Zakir, It was you?

Of course, not me. I don't have any magical power nor do I have a miner to do it.

[a1binos]

As I understood, blockchain.info didin't add fee automaticly, because even without fee it was High Priority Transaction. For now, I change fee policy in my wallet to add 0.001 to each transaction anyway.

[HasherMe]

My transaction has been stuck without confirmation for > 2 days. 

https://blockchain.info/tx/1efea73fc797ae98edcaf9f407742152bd473cef6fbd4376326b330da558e379

Is there anything I can do to confirm this tranaction?

I own the privatekeys for these 4 wallet addresses involved in the unconfirmed transaction:

1PLoWicvwt4ZQyPXjob1qF5PNwnchfkhR8
1HEEehUwzadonZ62a1bBVknofeqEjG58Kp
1AmirA93DaDaKMsTjWaNdSyiEyU3SVN59C
1Amir1fqsTfbf4XF3CsnnJkPCHrtnhMrTx

I used electrum to send the first three transactions and bitcoin-qt for the last (v0.10) on linux.  I tried pywallet to remove the transactions.  It looks like my first three tranactions are now merged into this one.  Notice the double spend warning on top.  I turned my qt and electrum off for now.  Anyone know what is going on?

[pringles1901]

Well if Bitcoin is meant to be king why would anyone want to wait 5-7 days to receive there payments just as well go back to the old cheque book method if thats the case

https://blockchain.info/tx/332c8589498d46cd1767988b3db6248bbdce539871aa37dbaf38da273323cd3b

[shorena]

Well if Bitcoin is meant to be king why would anyone want to wait 5-7 days to receive there payments just as well go back to the old cheque book method if thats the case

https://blockchain.info/tx/332c8589498d46cd1767988b3db6248bbdce539871aa37dbaf38da273323cd3b

#1 its not even 2 days
#2 your fee is low even without the current spam; 1650 satoshi for 373 bytes
#3 the network is currently heavily spammed, if you want a fast transaction you have to pay a higher than regular fee.