Questions tagged [pinning-attack]

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2 votes
2 answers
150 views

How does Bitcoin core knows whether CPFP carve out rule is already used?

Bitcoin node has 2 rules that limit the use of CPFP: number of descendants (including transaction itself) can't be more than 25 total size of transaction and all its descendants can't be more than ...
LeaBit's user avatar
  • 940
5 votes
2 answers
147 views

How would an adversary increase the required fee to replace a transaction by up to 500 times?

In the ephemeral anchors draft BIP (also discussed here) it states that without V3 transactions an adversary can increase the required fees to replace a transaction as much as 500 times. That sounds a ...
Michael Folkson's user avatar
3 votes
1 answer
126 views

What is an ephemeral anchor and what problems do they address?

What is an ephemeral anchor and what problem(s) would their introduction address? What is their relation to anchor outputs in Lightning? Are ephemeral anchors a prerequisite for eltoo? V3 and package ...
Michael Folkson's user avatar
0 votes
1 answer
111 views

What issues would changing the default policy in Core to mempoolfullrbf=1 resolve and which of the current policy proposals would be simplified?

What issues would changing the default mempool policy in Core to mempoolfullrbf=1 resolve and which of the current policy proposals (e.g. BIP125 replacement, V3 Policy, package RBF, discussed here) ...
Michael Folkson's user avatar
1 vote
1 answer
221 views

What and where are the current status of the BIP 125 replacement, the V3 Policy proposal, package RBF etc?

Whenever I try to review P2P and mempool (default) policy proposals I end up going round in circles around this maze of docs, mailing list posts and pull requests. Some of them are outdated, some ...
Michael Folkson's user avatar
4 votes
1 answer
126 views

How does RBF (BIP 125) behave, when the unconfirmed UTXOs are being spent?

Let's assume we broadcast transaction A (TXA), signalling Replace-By-Fee as defined in BIP 125. We pay 1 sat/vByte for the transaction. One of the outputs goes to Bob. But Bob immediately spends his ...
Dalit Sairio's user avatar
14 votes
1 answer
2k views

What is meant by transaction 'pinning'?

What is meant by the term 'transaction pinning'?
jnewbery's user avatar
  • 1,060