I sent bitcoins and found that transaction is too large - what to do ?

[shark255]

I have sent transaction which has 340 inputs with 0.0001 btc fee.. I discovered that after sending from my Electrum wallet.
Now blocktrail.com shows that tx has not enough fee, and transaction is in pending two days.

What is the next scenario ?

Will my transaction come back if it will not be propagated ?

[defcon23]

I have sent transaction which has 340 inputs with 0.0001 btc fee.. I discovered that after sending from my Electrum wallet.
Now blocktrail.com shows that tx has not enough fee, and transaction is in pending two days.

What is the next scenario ?

Will my transaction come back if it will not be propagated ?

it should just be a matter of time .. i think.. , even with no fees, transaction finished to be propaged... sometime days ago.

[achow101]

You can attempt to do a CPFP transaction if there was an output that went to your wallet. Or you can shutdown electrum and wait for the transaction to be "forgotten" by the network in which case you can send it again but with a higher fee.

[ranochigo]

I have sent transaction which has 340 inputs with 0.0001 btc fee.. I discovered that after sending from my Electrum wallet.
Now blocktrail.com shows that tx has not enough fee, and transaction is in pending two days.

What is the next scenario ?

Will my transaction come back if it will not be propagated ?

By default, reference clients relay transactions if they have a fee of 0.00001BTC/kb. If you don't it would not be propagated well. Depending on the client behavior, it can rebroadcast the transaction after it has been dropped or simply stop rebroadcasting and you would be able to spend it again.

[Tstar]

Yes that are the kind of problems you need to face if you try to escape fees.
yes you have to give something to the developer back...lol

[tsoPANos]

Yes that are the kind of problems you need to face if you try to escape fees.
yes you have to give something to the developer back...lol

That applies only on multibit, electrum is totally free as far as I know.
Am I right??? 
Or....
Did you mean you have to pay something to the miner??

[Muhammed Zakir]

Yes that are the kind of problems you need to face if you try to escape fees.
yes you have to give something to the developer back...lol

That applies only on multibit, electrum is totally free as far as I know.
Am I right??? 
Or....
Did you mean you have to pay something to the miner??

He is just spamming! Nobody can undo a transaction. You can either double-spend a transaction with higher fees or hope miners will include your transaction.

[amaclin]

Nobody can undo a transaction.

Wrong. I can.

[medUSA]

I have sent transaction which has 340 inputs with 0.0001 btc fee.. I discovered that after sending from my Electrum wallet.
Now blocktrail.com shows that tx has not enough fee, and transaction is in pending two days.
Will my transaction come back if it will not be propagated ?

Electrum do not "forget" a sent transaction. The transaction will remain in your wallet. I believe you have to wait for the transaction to disappear from mempool. This could take a few days, verify on a few blockexplorer sites.

Meanwhile, you need to backup your wallet. Then restore your wallet from seed. This way, the unconfirmed transaction will be gone from your wallet. Once you made sure the transaction is removed from mempool (not found on multiple blockexplorer sites), you can create a new transaction with the correct fee.

[Muhammed Zakir]

Nobody can undo a transaction.

Wrong. I can.

Bitcoin transactions are irreversible. What you are saying is different than reversing it but I can't understand it. Can you elaborate?

P.S. I forgot to tell that a miner controlling more than 51% hashrate can double-spend Bitcoins or reverse an unconfirmed transaction by only accepting the transaction he wants to be confirmed. CMIIW.

[crairezx20]

ouch electrum has transaction fees.... im using electrum too... i didnt know that transaction have fees. than like bitcoin core....

[achow101]

ouch electrum has transaction fees.... im using electrum too... i didnt know that transaction have fees. than like bitcoin core....

All transactions have fees. You need transaction fees in order to get a miner to include your transaction in a block. Every client should be setting fees by default, not just bitcoin core.

[tommorisonwebdesign]

I would wait for the transaction to finish. Next time pay a bigger fee and the transaction will be faster. Double spending will only hurt the network.

[unholycactus]

ouch electrum has transaction fees.... im using electrum too... i didnt know that transaction have fees. than like bitcoin core....

All transactions have fees. You need transaction fees in order to get a miner to include your transaction in a block. Every client should be setting fees by default, not just bitcoin core.

For sure, although you should always be able to set a custom fee. Some wallets won't let you do that.

[tspacepilot]

Nobody can undo a transaction.

Wrong. I can.

Bitcoin transactions are irreversible. What you are saying is different than reversing it but I can't understand it. Can you elaborate?

P.S. I forgot to tell that a miner controlling more than 51% hashrate can double-spend Bitcoins or reverse an unconfirmed transaction by only accepting the transaction he wants to be confirmed. CMIIW.

MZ, we're not talking here about a transaction that has been confirmed.  We're talking about an unconfirmed transaction.

[shark255]

I have sent transaction which has 340 inputs with 0.0001 btc fee.. I discovered that after sending from my Electrum wallet.
Now blocktrail.com shows that tx has not enough fee, and transaction is in pending two days.
Will my transaction come back if it will not be propagated ?

Electrum do not "forget" a sent transaction. The transaction will remain in your wallet. I believe you have to wait for the transaction to disappear from mempool. This could take a few days, verify on a few blockexplorer sites.

Meanwhile, you need to backup your wallet. Then restore your wallet from seed. This way, the unconfirmed transaction will be gone from your wallet. Once you made sure the transaction is removed from mempool (not found on multiple blockexplorer sites), you can create a new transaction with the correct fee.

I did as you suggested, and after restoring from seed and on another computer with another electrum I got the same unconfirmed transaction in pending.

At the moment transaction is not found on any known block explorers. Can I make another spent from current unconfirmed spends ? Or maybe other suggestions
how to resolve this situation.

[crairezx20]

just like mine i was send btc to another btc wallet and untill now its pending my fee is 10 bits and my send btc is 5000bits....

[Hugroll]

It'll either get confirmed or dropped within days. if it gets dropped just send it again with more fees.

[allyouracid]

It'll either get confirmed or dropped within days. if it gets dropped just send it again with more fees.

I have a question concerning this. I read that e.g. blockchain.info will "forget" (a.k.a. remove from mempool) a transaction after 48 hours, iirc.
Is that a special implementation at blockchain.info or is that something that applies to any wallet, no matter if it's on a mobile phone, a web wallet or a locally installed one on your PC/Notebook/Mac/whatever?

And, do such transactions indeed appear in the block explorers (as they were propagated to the network, already), stay in mempool and as soon as the period of 48 hours has passed, they disappear from the block explorers (if they were not included into a block)?

Are they sort of "unpropagated" then, or do they have a flag set which "undoes" those transactions, or do they disappear forever from the blockchain then?

[ranochigo]

It'll either get confirmed or dropped within days. if it gets dropped just send it again with more fees.

I have a question concerning this. I read that e.g. blockchain.info will "forget" (a.k.a. remove from mempool) a transaction after 48 hours, iirc.
Is that a special implementation at blockchain.info or is that something that applies to any wallet, no matter if it's on a mobile phone, a web wallet or a locally installed one on your PC/Notebook/Mac/whatever?

And, do such transactions indeed appear in the block explorers (as they were propagated to the network, already), stay in mempool and as soon as the period of 48 hours has passed, they disappear from the block explorers (if they were not included into a block)?

Are they sort of "unpropagated" then, or do they have a flag set which "undoes" those transactions, or do they disappear forever from the blockchain then?

Forget means that they do not rebroadcast after it gets dropped out of the mempool. The amount of time it takes for a transaction to drop out of mempool depends on whether the wallet rebroadcast it again and again. If it always does that, the transaction will not drop out of the mempool till it confirms. At times, people can rebroadcast it for you even if they have no private key. The hex version of the transaction is easily obtainable and can be used to broadcast transactions. After it gets dropped out of the mempool, it will not leave a trace unless someone decides to broadcast it again. It would be invalid if it gets spent already. I once sent a 0 fee low priority transaction using multibit and it never got dropped even though I uninstalled it and it tools several weeks to confirm. It is possible to disable rebroadcast as of bitcoin core 0.11