All Questions

My scenario: My web server: - Generates private and public, and a wallet address from the public key for a user website account - Server can not connect to the outside (Can not connect to the Bitcoin ...

I'm developing a bitcoin application which saves Block to a file from which it can be read at later point of time. So I'm converting CDataStream vRecv to hex string using below bitcoin defined ...

Difficulty adjusts by very granular percentages to target for 10 minutes blocks. But adding another zero at the end of the chain of zeroes from the header hash requirement for a valid block would ...

I'm essentially trying to build a cryptocurrency in python with the same scheme as bitcoin or something else except instead of encrypting the information such as ledger information in a 256 bit SHA ...

Suppose Alice sent 2 bitcoins to Bob, Bob ships the product to Alice, then Alice sends 2 bitcoins to herself. Why is this a problem ? If both the transactions are approved then also Bob gets his 2 ...

Is it possible to send BTC from wallet having address type p2pkh to the receiver wallet address p2psh

I SENT BITCOIN CASH FROM MY COINBASE ACCT TO EMPIRE WITH THE BITCOIN ADRESS GENERATED TO ME FROM EMPIRE MARKETPLACE. IT SAID IT WENT THROUGH BUT IT DIDNT IT WAS REDIRECTED TO BLOCKCHAIR WHERE I DONT ...

Usually there is an assumption, that a transaction is fully finalized after 6 confirmations, e.g. 6 blocks mined on top of the block, which includes given transaction. What is the length of largest ...

I’ve created address in bitcoin core from rpc and send some bitcoins on it, but my balance still zero. Transaction exists I’ve checked on blockchain info. Getaddressinfo returns “ismine”: true, but ...

I'm trying to set up Blockchain.info web APIs to notify me when I receive a BTC payment: https://www.blockchain.com/api/api_receive So say, if I generate a receiving address as such: https://api....

I'm studying Bitcoin's Protocol and I want to replicate P2MS in regtest. Yes I know that I can use P2SH but I'd like to understand it more in depth. I Have 3 addresses P2PKH (A and B and C). A has 50 ...

I'm trying to understand how does bitcore-node, the javascript implementation of Bitcoin protocol, get its data? Can it connect to Bitcoin Core, the original C++ implementation of the Bitcoin protocol,...

i am currently parsing blockchain transaction data from the raw hex blk00000.dat files downloaded by Bitcoin core. In order to validate, i compare my results with blockchain.info from time to time. ...

I have setup a regtest net locally with 2 nodes. One of nodes generates blocks using 'bitcoin-cli generatetoaddress 10 ', sendcompact message was sent from other node yet it gets normal block(...

i would like to print out bitcoin transactions from a specific bitcoin mining pool not just a bitcoin address using php and a blockchain api or any other api here's all i have <?php $address = "...

I'm reading through some of the documentation for Ripple and came across the following: Each trust line is specific to a given currency code. and In a sense, rippling is like a two-way ...

I was just wondering what the new KYC rules enforced in Feb 2020 will effect VPN users in the US.

I am trying to compute the minutely premium index at 2020-01-23 17:24 UTC for XBTUSD on Bitmex. At this time, Mark Price = 8330.53, Impact Bid Price = 8339.5, Impact Ask Price = 8340.2836, Spot Price ...

in just a few years I believe that quantums will exist that break asymmetric ciphers, and bitcoin is based on asymmetric ones like public-key-cryptography, correct? Symmetric algorithms are supposed ...

I have a forked coin from litecoin source , the current nodes are running on codebase 0.8 of litecoin (which i know is old) , i am upgrading it to a newer 0.13.2 version codebase , while testing ...

I was thinking to design a application which is not dependent on server and can directly send and receive data to and from other clients.I learned it is possible with UDP but how can new users join in ...

Does anyone know of any papers / evidence of bitcoin mining pools communicating outside of the bitcoin network for financial gain? It seems plausible in practice, but I am not sure if that has ...

As title says, I would like to know if mining with asics on aws is possible and how to do it? I don't mean profit because I don't really care and only do it for fun. Thanks!

I am making an app, and I want my users to deposit BTC coin to my address which is an exchange address (I don't have the private keys). How can I know which user made which transaction? I have a way,...

1.)If there is no central authority maintaining database how miners differentiate among other miners. 2.)Do they have there own database which have details(Mac/IP address) of neighbouring miners . 3....

So I already have the node set up on my raspberry pi. This night the transfer of the Blockchain from my laptop to the raspi's hard disk finished. Now I am waiting for the blocks to match the headers "...

My friend has a bitcoin on tradebrite.net/ website and the website is not launching or opening the page. how can he transfer his bitcoin to some working website or wallet.

I've been reading confusing information online about what the --reindex startup parameter does. This link is not clear to me. https://github.com/bitcoin/bitcoin/blob/...

I am testing a Bitcoin application, and to test the signing of transactions I use regtest with Bitcoin Core. But I have some problems, the first I have already published in a question that I still ...

I am trying to start a local test blockchain fork of peercoin. I have updated the genesis and network parameters, mined the new genesis hash and have successfully started and connected two nodes to ...

I'm studying segwit and I'm doing some experiment in regtest. I create a raw transaction with P2SH address. My Transaction data without signature is: ...

i have a question , i've searched a lot but no answers i get i've installed bitcoin core and after opening the app , it is downloading about 160GB and its gonna take two weeks to be completed my ...

We have a bitcoin node running on a server which we use to generate addresses to receive small payments from the users. We receive tons of small payments daily right now and then we are using the same ...

Based on my research every bitcoin private key (compressed or uncompressed) can have 4 different addresses: P2PKH compressed and starts with 1 P2PKH uncompressed and starts with 1 P2SH and starts ...

For example, could you have the following transaction: A --> B A --> C Where A is an input txid and index, and B and C are outputs? The reason I'm asking is because I believe with SIGHASH_SINGLE ...

I'm using the mobile "trust wallet" app, and my plan is (was?) to write down the mnemonic key and keep it in a safe place, then delete the app. Then whenever I need to receive or send money to a ...

After having finished the "Initial Block Download" I needed to reindex: [BTC_Core_Expmnt]# bitcoind -reindex -datadir=/mnt/BTC_Core_Expmnt The debug.log showed everything starting up ok; and the ...

How can I see which values bitcoind is using for eg. dbcache, or other memory and connection params ? If the value is NOT set in bitcoin.conf. Is there a bitcoin-cli command to check all the params ?

In an exchange website we just book trades in our database and just when user want to withdraw his BTC balance we make a real transaction in bitcoin network for him. Consider a scenario that a user ...

I am reading an article about how HASHSIG works, but i don't understand this: Before the signature is computed, several temporary changes are made to the transaction: The signature script of the ...

using bitcoin-qt 0.19.0.1 on mac, I type this in console: importaddress someaddress "" false After I hit enter, the output is "null". What's wrong ?

Let's say I'm in idiot was mining back in 2009 2010 I'm shure I moved 70 million in bitcoin about a year ago I got every wanna be hacker trying to or already have got all my info but to top it off ...

I am doing some tests to understand the stratum protocol. If I connect to a stratum pool (slush in this case), and check the data I receive after mining.authorize, I get the following previous hash: ...

What's the Bitcoin wallet or exchange house with the lowest fees?

I am little bit confused or not able to get the right Address Node Public key from Account XPUB. What i have Done : 1==> Get the Account XPUB [78Bytes] 2==> SHA-256 3==> SHA-256 Again 4==> ...

I am new to Bitcoin. I have downloaded the whole blockchain but I still can't access my wallets because I get a popup telling me to use prune mode. My question is: I know that I have received ...

I am reading and watching about transactions and they say a transaction's input is previous transaction's output. They all show diagrams in which these transactions are consecutive. How an account's ...

I have an old paper wallet with Private Keys of 58 characters (all starting with a 6). These can be imported e.g. on blockchain.com, but since I still have BSV on this key, I have to import/sweep it ...

My question is - let's say a miner has control over a certain number of bitcoin addresses. He creates a block containing small transactions to and fro from these accounts ahead of time in advance and ...

I have just discovered, albeit far too late, that Cryptobridge has closed. Now, there is a lot to say about this particularly dodgy move, but I won't and I'll keep this simple: How can I access the ...