Questions tagged [doublespend]

This tag should be used for questions related to double spending. Double spends are when a money is spent more than one time. This is considered a form of fraud.

16 questions with no upvoted or accepted answers
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How to ignore balance check to cancel unconfirmed transaction (double spending)

I need to cancel a transaction that was sent without fee (using Blockchain.info). It is currently "Unconfirmed". The only way I have found is to do a double spend of the whole wallet, specifying a ...
2
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0answers
60 views

Wallet's role in a double spend attack

How does my wallet allow me to double spend? As soon as I make a payment, shouldn't my wallet delete those bitcoins or does it leave them until the transaction is added into the blockchain?
2
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2answers
323 views

Double spending on testnet or regtest?

I'm currently doing a research on bitcoin and I would like to know if there is anyway to replicate double spending in the testnet or regtest? If isn't possible is there any other type of "attacks" ...
2
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0answers
1k views

Bitcoins unconfirmed even after double spend

I'm very new to bitcoin and recently bought 0.066 bitcoins and transferred them to my electrum wallet. I then transferred them to another wallet but I set the fee too low (40Sat/b) and it was stuck in ...
2
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0answers
42 views

Globally distributed accomplices for improved outcome in race attack

Would it help you to win a race attack if you had accomplices from all over the world, say Berlin, Beijing, Boston, and Buenos Aires all propagate your transaction to the nodes that they're connected ...
1
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0answers
43 views

Bitcoin, BTC.com and monitoring double-spend attempts

I'm reading Analysis of hashrate-based double-spending article. On page 10 there's a table listing probability of successful double-spend attack in relation to required number of confirmation. ...
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0answers
81 views

Bitcoin Paper: Why do we need the probability of catching up in double spend attack?

In the Bitcoin original paper, we have two probabilities: 1- Probability of generating k number of blocks in the period T in which z confirmations are generated. 2- Probability that the attacker ...
1
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0answers
679 views

Is double spending with electrum still possible?

I tried to follow this tutorial, but I kept on getting an error message saying that there was a mempool conflict and that it was rejected by the network.I even used a script so that the mouse clicked ...
1
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0answers
266 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 ...
0
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0answers
34 views

How to create a double spend to prioritize a new transaction over a previous unconfirmed transaction?

I'd like to generate a double spend transaction and increase the gas fees over the previous, unconfirmed transaction that has been stuck for a week. I know there's other answers regarding double spend ...
0
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1answer
58 views

Exchange Confirmation Requirements

What does the minimum confirmations required for a deposit mean for the security of exchanges? For example, Coinbase requires 3 confirmations for Bitcoin deposits. Suppose an adversary deposits 10 ...
0
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0answers
1k views

Unconfirmed bitcoins 258: txn-mempool-conflict

I made a transaction a few days ago, but the fee was to low so it doesn't get confirmed. So I want to give the transaction a higher fee. But when I resend the transaction I get this error: 258: txn-...
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1answer
55 views

in the white paper you have 2 sides : attacker and honest node

What does it mean that there is either the attacker or honest node. This means that within 10 minutes either attacker or honest node mines a block but what about neither OR another side ? How could ...
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1answer
3k views

How do I double spend using electrum?

I have created a transaction several days ago, with a very low fee. The transaction was meant to remove dust from my wallet, so increasing the fee won't help as the transaction is very big (1.6KB), ...
0
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1answer
499 views

Ripple's validation of transactions / Ripple white paper?

Is there a ripple white paper or some safe source to understand how the transactions are validated and made in the ripple network? VS Bitcoin, XRP is not mined, so how is the agreement reached? (I ...
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2answers
77 views

Double spending problem in Bitcoin

Suppose Alice sent 2 bitcoins to Bob, Bob ships the product to Alice, then Alice sends 2 bitcoins to herself. Why is this a problem ? If both the transactions are approved then also Bob gets his 2 ...