Unanswered Questions
248 questions with no upvoted or accepted answers
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 ...
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
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
4
votes
0
answers
675
views
Bitcoinj: How to fix error "You should use Context.propagate() or a ContextPropagatingThreadFactory"
I'm using bitcoinj from a Scala application... and when I start it, I always get the following errors:
[error] o.b.c.Context - Performing thread fixup: you are accessing bitcoinj via a thread that ...
- 197
3
votes
0
answers
75
views
How to segregate wallet from bitcoin core | Run multiple wallets in different servers on one centralized bitcoin node
I am running bitcoin full node in a centralized server. I have many web applications running in various places. I want to connect this web applications with centralized full bitcoin node. How to ...
- 31
3
votes
0
answers
445
views
How do bitcoin nodes know their own external IP address?
I'm studying the bitcoin source code and I have a doubt about if: Bitcoin nodes still follow the methods explained at the "Satoshi Client Node Discovery" wiki page?
More specifically, if they follow ...
- 171
3
votes
0
answers
742
views
Can I quickly check the cofactor of secp256k1 is 1
I was wondering if there was a quick way to check that the group underlying the elliptic curve secp256k1 was indeed cyclic with the usual point G a generator. I am given the prime number underlying ...
- 1,524
3
votes
0
answers
103
views
Whisper Implementation in Bitcoin
Is there some kind of implementation in bitcoin to communicate between nodes, which is similar to the Whisper Communication in Ethereum ?
Whisper, is a communication protocol for DApps to communicate ...
- 758
3
votes
0
answers
585
views
Blockchain.info may have created a bad private key
A few weeks back, a client wanted to pay me in bitcoin so I created an account at blockchain.info. The transaction went through and the coins show in my account.
When I tried to use it however, I ...
- 31
3
votes
0
answers
158
views
Does a bitcoinj SPV node forward transactions for itself?
The bitcoinj library offers a rather convenient WalletAppKit class, which I'd like to accept payments from customers. In order to facilitate the payments I'd offer the customers to send the ...
- 9,563
3
votes
0
answers
562
views
Blockchain.info Shared Send
Can anyone comment on the trustworthiness of blockchain.info's mixing service (shared send). Also would it be possible for things to go wrong internally resulting in my loss?
- 158
3
votes
0
answers
257
views
Bitcoin-qt database for BitcoinJ downloadBlockChain()
I am using bitcoinJ to develop a bitcoin based payment module for my project. I have the complete block chain downloaded/in sync with the network on the bitcoin-qt client.
Is there a way I can use ...
CommunityBot
- 1
3
votes
3
answers
1k
views
Get transaction that spent a transaction id
The blockchain.info API allows for querying information about a particular Transaction by its ID. But if you want to follow the coins to the next transaction, I'm not seeing what the next query should ...
CommunityBot
- 1
3
votes
1
answer
245
views
What is the age of the oldest known Bitcoin core developer?
I am trying to compile some demographic data on who has contributed to Bitcoin so far and track how the demographics are changing over time.
Since GitHut does not show me demographic data I have ...
- 474
3
votes
1
answer
275
views
Can there be more than one result of decoding a raw transaction?
I was looking in rpcrawtransaction.cpp and came across the signrawtransaction rpc method. While reading through this method, I thought these lines seemed strange:
vector<CTransaction> ...
- 14.2k