Topic: transaction disappeared from block chain?? (Read 804 times)

your transaction was confirmed
https://blockchain.info/en/tx/d2d79b1c5153c8e6c4dc007044b277b345a4867954cd8d9ec5d5b9f0675a0563
 

Hmm, again, from that wiki page:


I know, that is talking about the reference client's block construction behavior but it might explain a few things if it is a fair representation of what miners are doing.

A quick scan of my mempool of unconfirmed transactions and their priority, sorted by "highest priority":
First column is bytes.  That's pretty much going to eat up the "30000 is reserved for highest priority" for quite some time.  You're currently ranked #171 from the top of that list.  There's 577781 bytes of "high priority" traffic ahead of yours.

Because your tx is fee free, it won't fit in the second group.

It is unclear how many pools use the transaction selection models that the reference client uses, or what quirks they have.

This is going to take a while.  Be extremely careful if you're thinking of resending, it could still confirm.

First of all, there are several key components in play here.

1) Your wallet.  It has an unconfirmed transaction in it.  Your bitcoin client will keep doing a ResendWalletTransactions() every so often to the P2P network until it is either confirmed by a miner, or you delete it from the wallet.

2) The P2P network.  Every bitcoin node keeps a list of unconfirmed transactions in memory (the MemPool) so that they can be relayed to other nodes.  They time out after a while - exactly how long depends on local factors, activity, node restarts etc.  When the nodes see transactions appear in blocks, they also get removed from the mempool.

3) Miners.  They take the highest priority transactions from the mempool and set them in stone in blocks.

Wallet clients normally resend the transaction periodically.

I poked around a bit.  *my* clients all know about the transaction of yours:


It looks like you spent 5 outputs:
#1570 of 7bd8cecc8481baffbb545efc6f9949ccd2c3d87241ff6316c2d4fb975d055891 (0.109 btc 2071 confirm)
#836 of 330a32b6d7312ea2ad8b6b50cb6e418d251d73822aa3d48c979aea9f0544658f (0.161 2226 confirm)
#908 of ba8a17326f7f85ca27e2be8954d8da4ac8755486ce8f71b463f86da73c44b455 (0.021 btc 801 confirm)
#540 of 19c53d50895e35d1a0445c66dca1bef3cde39dd64603f1729a4db8c6dff6174b (0.024 btc 1762 confirm)
#2722 of d07d6c039b95484a634ea5d8e3e44da54aed8abcb8d313da92396a8e62e3a758 (0.093 btc 1327 confirm)

My quick dig around in the blockchain shows these as unspent.

However, on https://en.bitcoin.it/wiki/Transaction_fees it talks about transaction priority as a prerequisite for a fee-free transaction.  I'm pretty sure that is old information.
.. so it should qualify for fee-free.  In my client's mempool, is ranked at priority 2014 of 2180.. right near the top.

Aside from the zero fee (which it is entitled to be, according to the rules), I'm not sure I see why this hasn't confirmed yet.

What am I missing?

Thanks for the explaination/info. JoelKatz said they never left my wallet, but fsb4000 said it's still on the network. So now this raises even more questions: on what premise does blockchain.info have on choosing whether to delete a transaction data or not? Since it's still actually on the p2p network, does that mean I just have to wait until it gets confirmed?

It's just blockchain.info deleted the transaction from the site. The transaction is still in Bitcoin p2p network.
For example, the transaction d2d79b1c5153c8e6c4dc007044b277b345a4867954cd8d9ec5d5b9f0675a0563 exists in my Bitcoin QT mempool

and here:
http://blockr.io/zerotx/info/d2d79b1c5153c8e6c4dc007044b277b345a4867954cd8d9ec5d5b9f0675a0563

blockchain.info =/= bitcoin p2p network

The short version:  Your Wallet thinks the transaction has been spent. It'll try to re-broadcast it to the network periodically.

If you're using older bitcoin software, check out pywallet - you can delete the transaction and stop your client trying to re-send the transaction.  This will free up the 0.4 btc for respending.

If you are using 0.9rc2 or later, there are new options:

  -rescan                Rescan the block chain for missing wallet transactions
  -zapwallettxes         Clear list of wallet transactions (diagnostic tool; implies -rescan)

The latter discards the transaction record and rescans the wallet to find them again.  This gets rid of stuck / unconfirmed transactions that can't be confirmed.

Note: if the network has a copy of the transaction in the P2P network and its queued up at a miner, it could still be confirmed - in which case your client will notice and update the balances.

No matter what you do (pywallet or a 0.9 zap/rescan), a solid backup of your wallet would be in order.

Please call that service "blockchain.info". "Transaction disappeared from block chain" would be interpreted as a major re-org of the blockchain or a major flaw in bitcoin

It never left your wallet. It's still exactly where it was all along.

You may have to do a rescan on bitcoinqt

I sent 0.4 btc and forgot to pay the fee. This transaction was unconfirmed for several days, but was on the blockchain and status said priority was high during these several days. Now, it just totally disappeared. I was thinking it was not included in any new blocks, no problem, I'll just send it again and pay the fee.

However, this 0.4 btc never went back to my wallet, never made it to the other wallet, and does not show on the blockchain. It's in limbo somewhere. Where is it, and how can I get it back? Original thread HERE.



Transaction ID: d2d79b1c5153c8e6c4dc007044b277b345a4867954cd8d9ec5d5b9f0675a0563
wallet it's suppose to go to: https://blockchain.info/address/1pw9R8BCWdojic8bryNqaAXoh77D5tBeb