0xb10c
  • Member for 4 years, 2 months
  • Last seen more than a week ago
What is this unusual transaction in the Bitcoin blockchain?
5 votes

To add to Murch's answer: The output was created by Matthew Zipkin to test support for sending to SegWit v1 support on purse.io. This was done in the context of the Bitcoin Optech Compatibility Matix. ...

View answer
DumpMempool() and LoadMempool() in src/validation.cpp
Accepted answer
4 votes

What exactly is happening in src/validation.cpp and what is saved in mempool.dat, when is this data required, what happens if there is an issue saving or loading data from the file? The current ...

View answer
Download blocks in blk00000.dat format from a specific period
3 votes

Bitcoin Core is the only software that saves the blocks in the blk*.dat format. This format is not standardized and internal (i.e. not exposed to users). The contents of, for example, blk2342.dat can ...

View answer
How do I to get the r, S and Z values from a raw transaction (version 2)
2 votes

Your question is somewhat unclear. I presume you are using Bitcoin Core and want to extract the r and S values from the ECDSA signature(s) in your raw transaction. I don't know what you mean by "...

View answer
Error while syncing with the blockchain on my Raspberry Pi
0 votes

As @MartinSolie noted, it might be helpful to look into the debug.log file. Based on what you describe, it sounds like your Bitcoin Core node crashes at some point while synchronizing. You mentioned ...

View answer
Why is getdescriptorinfo returning an error "Invalid descriptor (code -5)"
1 votes

Descriptors in Bitcoin Core can have a suffixed checksum. sh(multi(2, [3c60330a/1]03061b79f20d49790c15bdaf15ec8db6d75275f62f04a56eaac31f5c2db48736fc, [d54e4481/1]...

View answer
Statistics on Multisig Bitcoin Accounts by type of multisig
0 votes

The site p2sh.info somewhat covers what you are searching for.

View answer
How does a wallet get the public key from an address?
1 votes

There are different kinds of outputs a transaction can pay to. For simplicity I'll explain it with a Pay-to-PubkeyHash (P2PKH) output as an example. I think this is what your question is based on. ...

View answer
What feerate estimation APIs are there?
Accepted answer
3 votes

I've listed some public feerate APIs by block explorers and payment processors below. Purposefully leaving out APIs from wallets, since they don't advertise their APIs. I leave out Bitcoin Core's ...

View answer
How can I fund my node in regtest?
Accepted answer
4 votes

No, there does not such thing as initialfreecoins=10000000. However mining on regtest is not resource hungry and nearly instant. It's the only way to get coins. To get coins on regtest you first need ...

View answer
How do BIP numbers get assigned?
Accepted answer
4 votes

The current BIP process is defined in BIP-2. An author drafting a new BIP leaves the BIP number in the preamble marked as XXXX. A BIP editor assigns a number to that BIP when the draft phase is ...

View answer
Is there any full node software for bitcoin with serious wallet functionality?
Accepted answer
2 votes

You can connect your Electrum wallet to your own Electrum server to preserve privacy. There are different Electrum server implementations: Electrum Personal Server Electrum Personal Server aims to ...

View answer
How to estimate/get network fees via blockchain.info API?
2 votes

Blockchain.info offers a fee API: https://api.blockchain.info/mempool/fees The response looks something like this: {"limits":{"min":1,"max":75},"regular":3,"priority":50}. To calculate the transaction ...

View answer
Is it technically possible to solo mine bitcoin using cpu without a pool? How? Ubuntu
3 votes

For development it's often helpful to start both nodes in regression test mode (regtest mode). The developer has his own private blockchain and can choose when to create a new block. You can use ...

View answer
How to delete wallet without deleting blockchain
Accepted answer
4 votes

As Raghav already commented: Yes, you can delete the wallet.dat file as long as you don't have any private keys in it. Once you restart Bitcoin Core it creates a new and wallet.dat.

View answer
Slow sync running Bitcon full node on Mac Mini OSX
1 votes

Syncing the bitcoin blockchain on lower-end hardware takes it's time. Just let it run.

View answer
What prevents DoS based on near-valid block timestamps?
2 votes

I'm answering both questions at once. It's not uncommon for the network to split i.e. different nodes accepting different blocks as chain tip. In fact this happens from time to time as two or more ...

View answer
How output transaction works in Bitcoin?
Accepted answer
1 votes

So what will happen if an output of 1 BTC is available for me to spend, but I want to spend 10 BTC? If you have 1 USD in your pocket and you want to buy something for 10 USD, you simply can't. The ...

View answer
what does it mean to have >51% hashing power for mining a block?
0 votes

What does it mean to have > 51% hashing power for mining a block? Having more than 50% of the hashing power in the total network means that you are likely to produce more that 50% of the blocks at ...

View answer
Why is my blockchain.com not receiving bitcoin?
1 votes

Your bitcoins are not lost. What you observed is completely normal behavior which one would experience across most wallets. The wallet generates a new address once it detects that you have received ...

View answer
Paper wallet generator that can split a private key into multiple parts like a multi-sig transaction?
Accepted answer
1 votes

www.bitaddress.org offers something similar to your description. It's under the Split Wallet tab once you generate enough entropy. You can even specify a m-of-n multisig.

View answer
Connecting to Regtest
Accepted answer
1 votes

The default port for bitcoin regtest is 18444. You can set a custom port with port=<port> in your bitcoin.conf or by passing -port=<port> as argument.

View answer
Sweeping a bitcoin private key using PHP
Accepted answer
2 votes

No MVP PHP code, but some bits that could help. verify the private key Assuming you want a private key to be in the secp256k1 ECDSA range. You could check if the key is any number between ...

View answer
How can I access the mnemonic in the mobile copay wallet?
Accepted answer
1 votes

You should be able to view your mnemonic within the Android App under Settings > Bitcoin Wallet: Personal Wallet > Security: Backup.

View answer
Is it possible to reverse a confirmed transaction?
2 votes

No, a confirmed transaction can not be reversed.

View answer
Transaction vaildation
Accepted answer
2 votes

First of, each node on the network maintains an UTXO-set. Not only miners. to 1. The UTXO-set is created by applying all transactions in each block in the chain from the beginning. All transactions ...

View answer
Getting Started With Script
2 votes

You might want to check out btcdeb from kallewoof. It's a set of tools used to construct or debug bitcoin script.

View answer
Is there a way to disable a blockchain validation?
1 votes

No. There is no option to disable the block validation. What you might want to do is a testnet sync. The download and the validation should finish much quicker. Depending on your use case the testnet ...

View answer
Bitcoin core verification keeps reseting
Accepted answer
3 votes

As 0x49D1 reported: reducing the Bitcoin Core database cache helped to reduce memory usage, which caused the crashes while syncing. In bitcoin.config dbcache=<n> or as command-line argument -...

View answer
Where does this pattern in the feerate distribution per block originate from?
1 votes

As Andrew Chow pointed out, my feerate calculations were wrong. I used the totalSize of the transaction. Correct would have been to use the virtualSize. With correct calculations the visualization ...

View answer