Unanswered Questions
362 questions with no upvoted or accepted answers
4
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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
1
answer
78
views
What are the malleability threat vectors when passing PSBTs to other actors?
If I am passing a PSBT (Partially Signed Bitcoin Transaction) between multiple people, and I pass on my signature for my UTXOs for given inputs, can someone take advantage of malleability and cheat me ...
CommunityBot
- 1
4
votes
0
answers
909
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To sign raw transaction with Segwit Address in the TestNet
I am using Bitcoin core 0.14.1 testnet. I created a Segwit address. transfer some coins to this address. Now I want to spend it. I created a raw transaction using console command i.e. ...
- 175
4
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675
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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
628
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bitcoin TransactionBuilder is not a constructor
I'm trying to send bitcoin with the bitcoinjs-lib library and I get the following error:
TypeError: bitcoin.TransactionBuilder is not a constructor
at sendmoney (/Users/....../bitcoin.js:53:18)
at ...
3
votes
0
answers
219
views
How can inputs be retrieved efficiently when parsing the bitcoin blockchain?
I downloaded the Bitcoin blockchain. I have a full node and I would like to do some parsing. I use RPC to send commands to Bitcoin Core from my Python program. When I get a block it works fine but the ...
- 77.9k
3
votes
0
answers
128
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Is there a way to sync bitcoin core without verification?
As the question asks, is there a way that one could sync the bitcoin client without verifying all the blocks. During IBD, downloading the blockchain isn't the bottleneck, what takes time is verifying ...
- 51
3
votes
1
answer
134
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How much on-chain activity is to and from exchanges?
Are there any data services which provide metrics that show how much of the transactions on the Bitcoin blockchain are to and from exchanges?
CommunityBot
- 1
3
votes
2
answers
292
views
How much data does it take to prove a given transaction exists on the blockchain?
As I understand the SVP protocol, a client can be reasonably certain that a transaction has been accepted on the blockchain if they know it is a member of a certain block, via the Merkle path, and a ...
CommunityBot
- 1
3
votes
0
answers
424
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HD Wallets - Generating P2SH-P2WSH Addresses from a ypub-type mpks in PHP?
I am writing a webapp in PHP that needs to generate Bitcoin addresses from their mpk.
I have successfully done it for P2SH addresses (starting with a 1, with a xpub mpk) using the BitWasp php library,...
3
votes
0
answers
336
views
pyminer for getblocktemplate/segwit?
I'm trying to resurrect my simpleminer.py script, based on pyminer, for use with Bitcoin 0.13.2 but the changes to the code over the last few years are overwhelming. I found out how to use ...
- 207
3
votes
0
answers
742
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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
844
views
Querying insight-api to dump all addresses with a positive balance
It's been some time I've been using 'insight-api' (https://github.com/bitpay/insight-api) and I couldn't find any documentation / anything helpful to query leveldb in a way that all addresses with a ...
CommunityBot
- 1
3
votes
0
answers
158
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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
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0
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257
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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