Your VPN will anonymize you with the peers you are interacting with on the bitcoin network, but the transaction you are making on the blockchain will be recorded for ever.
To increase your privacy the best advice would be to use different address each time you receive bitcoin and to be careful if you plan to use exchange for fiat money because their address ...
There is no way to reduce the amount of memory used by a loaded wallet other than modifying the code itself. There are no configuration options for this. You really should not be trying to run so many wallets on a low powered machine.
There is different way to optimize, configure or reduce the memory usage of bitcoind, I invite you to see this page from the bitcoind github who talk about it: https://github.com/bitcoin/bitcoin/blob/master/doc/reduce-memory.md
Bitcoin Core 0.18.0 is compatible with any wallet version from 2017, if you want to check you can download any Bitcoin Core release. Bust most probably you are misspelling your password.
You could try also from the console. Use this command to decrypt it for 60 seconds:
In Bitcoin-Qt click Window -> Console.
walletpassphrase your-wallet-passphrase 60
Let's run through the program.
The stack starts as <A sig> <A pubkey>.
You run OP_DUP. The stack is now <A sig> <A pubkey> <A pubkey>.
You run OP_HASH160. The stack is now <A sig> <A pubkey> <A pubkeyhash>.
You push (A expected pubkeyhash). The stack is now <A sig> <A pubkey> <A pubkeyhash> &...
Jumping straight to writing unit test can be hard, I suggest You check the official github page for how to contribute to the bitcoin core:
If I wanted to contribute I would personally start by trying to solve some of the problems on their issues page because it is fresh, there is a lot of work, ...
You can check this github page about btcd, one of the concurrent of bitcoin core where they talk about their API which is fully compatible with bitcoin
btcd provides a JSON-RPC API that is fully compatible with the original bitcoind/bitcoin-qt. There are a few key differences between btcd and bitcoind as far as how RPCs are serviced:
There really isn't any "starting over" in mining, because mining is effectively progress free, like a lottery and unlike a race. Nothing is lost when updating the transaction list, other then the negligible amount of processing needed to make the new list and bandwidth to communicate it.
The miner will include the additional transactions whenever it gets ...
I believe you are correct, both about the fact that height-based logic came first and time was added later, and the fact that this is a hard-forking change. A transaction with a locktime > 500000000 would not have been acceptable before the change, but possibly valid after.
Of course, given that no such transactions occurred (to the best of my knowledge), ...
You cannot directly clone a tree you have to first take the full repository then checkout the commit you want.
For the 0.16.1 version execute these commands in a shell:
git clone https://github.com/bitcoin/bitcoin
git checkout dac5d68
more informations here: https://stackoverflow.com/questions/43411941/i-cannot-clone-git-tree
As you've explicitly asked for Bitcoin-core 0.16.0 download link, Just went through the links for version 0.16.0 under bitcoin.org & bitcoincore.org & yes, links are broken!
So, even though I agree with Andrew that you may use other minor versions (e.g. 0.16.1, 0.16.3) without any loss, but when it comes to merely helping you to download your ...
This is not currently possible, as Bitcoin Core uses hardened BIP32 derivation to compute keys and addresses. This derivation scheme does not have a usable xpub that lets you derive the same keys publicly.
For more background, an xpub (or extended public key) is a string defined by BIP32. Every xpub has a corresponding xprv (extended private key). From the ...
The account system has been deprecated and removed, and is no longer available in Bitcoin 0.18.1. As it has been removed, previous account information is also no longer available.
You should transition to the new multiwallet system, or track accounts externally.
They may dislike compute to find transaction if they have to sequence search because they are busy to find hash value of block to earn block reward
You are confusing mining with node operation.
It is a full node on the network that will return info about the relevant merkle path to the SPV wallet.
Mining is done separately, by specialized hardware that ...
Thanks to all the contributors; I realized I was bit hasty..After continue reading the book (6th chapter now!) during my spare time I come across this passage
A digital signature serves three purposes in bitcoin (see the
following sidebar). First, the signature proves that the owner of the
private key, who is by implication the owner of the funds, has
https://ln.alhur.es/ provides a download link for their historical channel database from this link: https://ln.alhur.es/static/channels.db
Data starts June 2019 and provided by https://twitter.com/fiatjaf
A QR code encoding…
an on-chain Bitcoin address remains valid indefinitely. Although address reuse is not recommended, it could be used for multiple payments.
a Lightning Invoice will be ...
There is no concept of 'which address is paying the fee' in a Bitcoin transaction.
Instead, transactions are constructed as follows:
One or more UTXOs are specified as inputs. These UTXOs are spent in their entirety
New UTXOs are created as outputs. Each one is of a certain value, and pays to a certain address.
The difference (value of inputs - value of ...
The reasons for my problems where the following:
bitcoin-init seems to be the correct process.
getinfo is no longer a method, it has been removed.
My startup skript /etc/systemd/system/bitcoind.startup was running bitcoind with user bitcoin. When I started it manually bitcoind run with another user (the active one I was using the shell with). bitcoind ...
Cryptography and Encryption
In the wider world, cryptography is used for a variety of security related purposes:
Authentication (proof of identity, or proof of ownership)
Non-repudiation (author cannot later deny authorship of data)
Confidentiality (secrecy - third parties can't see the data)
Integrity (proof that data has not been changed or tampered with)...
With the order, I will try to response to your question.
Secondo questo thread presumo che il processo del demone bitcoind sia stato rinominato bitcoin-initma non sono sicuro di averlo capito correttamente.
I don't think the bitcoind is rewriting to bitcoin-init, but I don't have a mode for testing bitcoin-core on raspberry, so I ask you if you can post "...
Standard transactions are digitally signed using a private key. If a middle man tampers with the transaction, then the digital signature verification would fail, because the only way to produce a valid signature is to have the original private key. This would cause the transaction to fail and the network would reject it as invalid.
This signature algorithm ...
You if you're on docker, don't publish the RPC port to the host, therefore you're protected, even with rpcbind=0.0.0.0
on docker-compose file, specify the ports in the expose section instead of the ports section
I don't think is possible to work with the wallet bitcoin-core without blk file.
I think is a good example, if you go inside the car and her car does not have the fuel.
The mobile wallet has the remote full node with the full bitcoin blockchain.
But I don't know a mode for work with bitcoin core without the file blk, I think it is impossible, but id my ...
Starting from this
Per espandere la risposta di Amaclin, puoi esaminare i wrapper Python JSON-RPC come python-bitcoinrpc che ti consentiranno di effettuare chiamate al database dei tuoi nodi. Con un nodo completamente sincronizzato e txindex=1puoi iniziare iterando attraverso ogni blocco con per i cicli con getblockhash getblock getrawtransactione ...
That is a lot of bitcoin. Maybe you should keep your wallet secure, because it looks like a hack. What I mean is that if you have a wallet online and someone finds the part with the privkey, they can steal up to and including 100%.
The easiest way to do this by importing the address you generated on the offline Bitcoin Core client into an online fully synced Bitcoin-Core. The command is: bitcoin-cli importaddress <address>. The benefit of importing this address into the synced Bitcoin-Core machine is that you can use it as a watch-only address which will allow you to see all the ...
When you encrypt the wallet, only the private keys are actually being encrypted. You will be prompted to enter your encryption passphrase when the private keys are needed.
Public keys in the keypool, transaction information, and other metadata remain unencrypted because they are either public information or have no effect on the security of your Bitcoin. ...
Your question contains many misconceptions.
Yes, it is perfectly fine and safe to generate private keys and their corresponding addresses completely offline and not connected to the internet. In fact, people recommend that you do this because it is safer than doing it online.
There is no central database (Bitcoin is decentralized) where you must register a ...
What is the BTC address I could use for creating a transaction?
Any valid testnet address. You can get one from Bitcoin Core using the getnewaddress command.
How do I "unlock" it to be able to send a transaction?
Use the walletpassphrase <passphrase> <timeout> command where <passphrase> is your passphrase and <timeout> ...
Yes, you need to wait, because the tx fee is too low, it won't be mined ever, so the transaction will be refused.
BUT if you're using the lightning network, you can create instant transactions. You can read more about lightning.
If you're dealing with tons of money, recommended to wait for 6+ block confirmation, because a strong miner can rebuild the last ...
Bitcoin Core is the name of the software you are referring to, and it is the software that runs Bitcoin. Computers that run Bitcoin Core are usually called nodes on the Bitcoin network. It is open source, and there are hundreds of developers around the world that have and are contributing to it over the last 10+ years.
The software can be run by anyone, and ...
It is complaining about not being able to find the bitcoin-cli binary of the Bitcoin Core installation (which is normal since you are running it from a location that is not on the $PATH hence it can't find it).
To fix this issue you can tell lightningd explicitly which binary to use as bitcoin-cli by doing this: