Unanswered Questions
334 questions with no upvoted or accepted answers
4
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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
628
views
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
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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
466
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Electrum Seed Purpose for MultiSig Wallet
I'm curious as to what exactly is protected by the seed that Electrum generates for a multisig wallet. My knowledge of the protocol implementation is rather basic, so please correct me where I'm wrong ...
CommunityBot
- 1
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
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0
answers
844
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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
votes
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
3
votes
1
answer
195
views
What is the best way to implement withdrawal in online service?
Suppose we have a service, which holds user balance in Bitcoin.
How to implement withdrawal from bitcoin perspective?
Which RPC call to use? How to archive transaction to have a proof of sending ...
- 99
3
votes
2
answers
815
views
How to sign a transaction using BitcoinJ
I am having problem signing the transaction using BitcoinJ library without the Wallet instance, I only have the Transaction class instance and the ECKey in order to sign the transaction.
Is there a ...
CommunityBot
- 1
2
votes
1
answer
302
views
How to spend from a custom P2SH script using bitcore-lib
My Javascript/typescript project uses bitcore-lib. It uses Script.buildScriptHashOut to build custom P2SH outputs. How do I spend from this custom output?
CommunityBot
- 1
2
votes
0
answers
39
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Ypub test vectors missing for mainnet
Following extended key derivation scheme in BIP49 is there a publicly available test vector repository for mainnet? The test vectors in https://github.com/bitcoin/bips/blob/master/bip-0049.mediawiki#...
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