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0
votes
0answers
51 views

How big is the chance of double spending for 0, 1, 2, 3, 4, 5 and 6 confirmations?

I'm messing around with bitcoins a bit, and I'm now looking at the confirmations. In several places I read that 6 is the "normal" figure of confirmations needed to say a transactions has actually and ...
2
votes
1answer
174 views

Get notified of incoming Bitcoin transaction, as soon as it broadcasted

After a few weeks of searching for an answer, I decided to ask here. I want to accept a Bitcoin payment, to a specific wallet, and immediately, when the user approved the payment, to receive an ...
10
votes
3answers
239 views

How secure is zero confirmations?

I sent a small amount of BTC to someone and she was notified within seconds. But the first confirmation did not happen for ten minutes or so. What is the chance that this transaction could fail ...
8
votes
3answers
12k views

Why is my transaction not getting confirmed and what can I do about it?

I sent around 12 BTC from my Blockchain.info wallet to my LocalBitcoins account. They are showing at LocalBitcoins as an unconfirmed transaction. I have the fee setting at BlockChain.info set at the ...
18
votes
3answers
4k views

How does Satoshi Dice's 'zero confirmations' transaction system work technically?

The popular bitcoin betting game Satoshi Dice sends back payments very fast, they don't wait for confirmations. The user sends money to Satoshi Dice and gets back winnings a couple of seconds later. ...
6
votes
2answers
542 views

Can I spend a coin sent to myself before it confirms?

If I spend the entire balance in my wallet to another address in my own wallet, do I need to wait until it gets one confirmation in order to spend it, or does the client know it is my own funds and ...
6
votes
3answers
317 views

What nodes are best for lessening the risk of loss from a race attack

A successful race attack is one where the payment recipient's node receives a spend transaction yet the next block that is mined has a different transaction that spends the same coin. Thus the ...
7
votes
2answers
647 views

Double spend attack by sending higher fee transaction directly to the pools possible?

The standard client prioritizes TXs by the time of receipt, e.g. a conflicting transaction will not be relayed. This is not enforced by the network, though. Is there anything that would prevent this ...