Unanswered Questions
2,541 questions with no answers
9
votes
0
answers
222
views
What are the advantages to attackers of different styles of replacement cycle attacks?
In Antoine Riard's
original description of replacement cycle attacks against HTLCs, a replacement cycle looks like this:
Bob broadcasts an HTLC-timeout (input A, input B for fees, output X)
Mallory ...
7
votes
0
answers
223
views
Which wallets are spending P2TR with SIGHASH_ALL?
I noticed there are quite a lot of transactions spending taproot key path inputs that use SIGHASH_ALL instead of SIGHASH_DEFAULT in signatures (around 20% in the last two weeks). Recall that ...
- 10.4k
5
votes
0
answers
190
views
How does bitcoin core handle service flag spoofing?
There are 5 service flags in src/protocol.cpp:
static std::string serviceFlagToStr(size_t bit)
{
const uint64_t service_flag = 1ULL << bit;
switch ((ServiceFlags)service_flag) {
case ...
5
votes
0
answers
195
views
How to approach building a custom UTXO index on top of a full-node
I want to avoid physically importing addresses into a wallet. I want to write a UTXO indexing system on a per-address basis.
I often wonder how a wallet can keep track of all of its addresses' UTXOs, ...
- 77.9k
5
votes
0
answers
772
views
Bitcoin RPC: How to find the transaction that spends a TXO?
I suspect there is no good way to do it.
However is there any sub-optimal way to find the transaction that spends a transaction output (knowing the txid and index) with Bitcoin RPC?
Assuming txindex=1 ...
- 77.9k
5
votes
0
answers
315
views
BTCJam API 500 errors
I am currently trying to set up an application using the BTCJam api. I think the api could be very useful, but I have been unable to get it to work fully, and since support isn't responding, I thought ...
- 111
4
votes
0
answers
40
views
How do I negotiate the opening of a larger than 16777215 sats channel on a Core Lightning node?
Core Lightning's describes a maximum amount that can be given as a parameter to lightning-cli fundchannel:
The value cannot be less than the dust
limit, currently set to 546, nor more than 16777215 ...
- 916
4
votes
0
answers
69
views
Why hasn't Graftroot been part of the covenant soft fork discussion thus far? What are the downsides to this proposal?
I haven't heard much about Graftroot in the context of the covenant/vault discussion since around the time the Taproot soft fork was being finalized. The idea was initially posted on the bitcoin-dev ...
- 15.8k
4
votes
0
answers
110
views
Setting up to create PSBTs using Bitcoin Core from 10 year old non-deterministic wallet
I have an old wallet from 10+ years ago. It was created using an old version of Bitcoin Core before deterministic wallets were a thing. I have it now on an offline computer that has Bitcoin Core 21.0....
- 41
4
votes
0
answers
67
views
How to calculate the hashes in Lightning
I was wondering how I calculate the hashes regarding BOLT03 Specification:
The Revocation Pubkey is calculated like this:
revocationpubkey = revocation_basepoint * SHA256(revocation_basepoint || ...
- 10.4k
4
votes
0
answers
305
views
Creating a P2SH-P2WPKH using Bitcoin Functional Test Framework
I'm using the Bitcoin Functional Test framework to understand how SegWit works by analyzing and building a P2SH-P2WPKH transaction.
When I run my code the transaction gets created, but when I inspect ...
- 10.4k
4
votes
0
answers
501
views
P2TR bech32m mismatch
When attempting to create a p2tr address using the private key 0x0000...01 I get, bc1pmfr3p9j00pfxjh0zmgp99y8zftmd3s5pmedqhyptwy6lm87hf5sspknck9 which does not match the provided test vectors provided ...
- 5,676
4
votes
0
answers
186
views
Sign lightning channel creation PSBT with Golang
I'm trying to open a channel on regtest with LND v0.13.0-beta.rc3 using their PSBT workflow to allow for remote signing.
I've done the following steps:
I create a regtest wallet using the BIP39 ...
- 10.4k
4
votes
0
answers
394
views
How are taproot scripts represented in general?
I'm pretty familiar with the opcode style of writing down scripts. I can understand the stack-based language nature of bitcoin script where you can write down different script spend paths via ifs like ...
CommunityBot
- 1
4
votes
0
answers
167
views
Various caches are defined in the Bitcoin source code. What do these caches refer to?
The source code is as follows：
//! -dbcache default (MiB)
static const int64_t nDefaultDbCache = 450;
//! -dbbatchsize default (bytes)
static const int64_t nDefaultDbBatchSize = 16 << 20;
//...
- 10.4k