up vote 4 down vote favorite 2 I've sent a transaction from blockchain.info, but accidentally included too little fee.What can I do to cancel the transaction or speed up the transaction's confirmation?This is a complementary question to Why is my transaction not getting confirmed and what can I do about it?which answers the question's broader implications and proposes mitigation mostly focused on Bitcoin Core.blockchain.info transaction-fees unconfirmed-transactions up vote 6 down vote There are several approaches, none of them are bullet-proof.Also, I'm not aware of any wallets supporting any of the approaches except "wait it out".0) Wait it out.Even in April 2017, every now and then there is still almost free capacity from time to time where even low-fee transactions will pass; typically Sunday evenings.After 72 hours the transaction will be dropped by the network - though it's possible to rebroadcast it, both by the sender, receiver or any third-party.

1) Replace by Fee (RBF): Double-spend, as suggested by others, using a higher fee.By 2017 many miners will accept an RBF if and only if the transaction was sent with the "replacable"-flag set.2) Child Pays for Parent: Spend the unconfirmed amounts (either the "change" amount or get the receiver to spend their received amount), with a higher transaction fee.bitcoin foundation singaporeSome wallets allow this and many miners will include the whole chain of transactions into the block if the fee is high enough.tor bitcoin donationExcept for #0, this may be the only option that is somewhat supported by many wallets - though you may need to move all of the wallet funds to force the wallet to spend the unconfirmed bitcoins.bitcoin issuer3) As #0, but try to actively re-broadcast the transaction.bitcoin current block height

4) Ask the pools for help./ also has some similar service, there even exists services where one can pay by credit card to get the transaction prioritized.up vote 4 down vote Basically, you can double spend the input and add transaction fees.Firstly, this sounds crazy but it works!/watch?v=ycq7O48aPvQ up vote 3 down vote It looks like your transaction finally went through.bitcoin quiz masterI've had a transaction take longer than 24 hours due to not including a large enough miner's fee And currently there's no way to cancel a transaction after it's already sent, even if it's still unconfirmed.bitcoin la stampaSo it's a good idea to triple check the amount you're sending, the transaction fee and that it's going to the correct address.I think it would be helpful if bitcoin had this feature in the future: cancelling transactions while they're still unconfirmed up vote 3 down vote I want to delete my unconfirmed transactions from Blockchain.info?

Unconfirmed transaction means that your transaction is being broadcast through the network until some miner write it down into a block.If the unconfirmed transaction is not confirmed into the blockchain after some days, it is deleted from the network.Nowadays, there is no easy way to delete your unconfirmed transaction.Unless you broadcast it again with a higher fee.In that case, the one that enters first into the blockchain (probably the one with higher fee) will automatically delete the other one from the unconfirmed pool (after a propagation delay).Is there any way I can recover my bitcoins?While your transaction has not being written into the blockchain, it means that you haven't spent your bitcoins yet.Theoretically, you could still write a transaction into the blockchain spending such bitcoins the way you like it.However, the problem is that not the entire network accept that.Probably, you would have to broadcast it via the console of a bitcoin client.up vote 2 down vote If you're one of the recipients of the transaction (i.e.

via change output), you can create a child-pays-for-parent transaction by spending the unconfirmed output in a new transaction with a sufficiently high fee.From what I hear, you can specifically select the inputs for transactions on blockchain.info, so it should be easy enough to craft a transaction to that end.If you're comfortable doing so, you might want to try to export the private keys corresponding to the unconfirmed transaction and export it into another wallet in order to create a doublespend transaction to recover the funds.Finally, you'd always have the option wait it out, or to get in touch with blockchain.info's customer support.Note: I've never used blockchain.info myself, so please provide feedback to improve this answer if you have better insight.up vote 1 down vote If transaction is unconfirmed you may just double spend it.It would probably require creating a transaction manually (I have used node.js with BitcoinJS for it), and then submitting it via the console of the bitcoin client.

I would suggest also paying a bit higher fee (for the new transaction being confirmed before the old one) and not reusing any of source addresses used by either the old or new transaction, as double spend is easy to detect and people may not trust you.If the point is to just make the original transaction confirmed you may just try to resend it (using console).It sometime helps as unconfirmed transactions are broadcasted by the network only for limited time.up vote 0 down vote up until a transaction has been mined into a block it is not set in stone.therefore you can just issue a new transaction which spends the same txout as your original but which sends the funds to a different address.would this be classed as doublespending?not technically because nothing at all has been spent until the transaction appears in a block.this may be tricky (impossible?)to do in the standard client as it knows about the transaction you just created and so has deducted the funds in anticipation of them being mined into a block.

but you can create your second transaction by: downloading your private key from your wallet and loading it into a bitcoin client that knows nothing about your first transaction (note: never paste your private key into a website), or manually creating a transaction using bitcoin-cli, and broadcasting it to the network up vote 0 down vote The only thing you can do is to wait for the transaction confirmation, like me now.This link show that more than 120.000 transaction unconfirmed including ours https://blockchain.info/unconfirmed-transactions up vote 0 down vote I am in the same situation.I contacted my wallet provider and this was the responce."Hello, The bitcoin mempool is currently backlogged, which is causing a delay with transaction confirmations.You can follow it live on this chart, which shows all pending bitcoin transactions on the bitcoin network - https://blockchain.info/charts/mempool-count.This is impacting the entire bitcoin network, not just Blockchain.info.