All Questions

How can I get Bitcoin receive notifications with Bitcoin Core. I have tried the walletnotify and blocknotify options. walletnotify is fired two times when I send or receive bitcoins. And with ...

Private key is a number. Is the question positive or negative? Is it possible to know a positive private key or negative if you only know the public key? For instance: Positive private key: 2 ...

In the binary representation of the hash. Now the hash should be about 80 zeros. In the share - less, but how much exactly? At the dawn of bitcoin in a share, it was enough to have 32 zeros. Now the ...

I'm trying to understand the following two sites that display UTXO information. If I can figure out the method, that would be a bonus for this question but if I can't can someone explain why the two ...

I bought bitcoins that are stored in Cloud Token wallet. I found out later on that this crypto currency was part of a Ponzi scheme (shame on me). Currently I've had difficulty withdrawing my coins, ...

As the title says, I was wondering if the fastest Bitcoin ASIC miner will be profitable after block halving?

I am trying to reconstruct the individual proof parameters of a bulletproof range proof in a Grin transaction. Here is an example transaction file I created on the testnet. https://pastebin.com/...

I am quite new to the blockchain and bitcoin world. I was looking at some ProofOfExistance (PoE) solutions (Digital Notary) for documents. While these solutions store the hash of document+timestamp, ...

I sent my 0,1 bitcoin on the 8th of Januari from an offline wallet (Bitcoin Core), to an online wallet. Still haven't got the btc in my new wallet. The status on the offline wallet says: ''unconfirmed,...

I am working on a research in bitcoin blockchain where I am making some changes in conventional transaction structure of bitcoin blockchain. Due to this, it helps to increase the transaction ...

Please, can anyone direct my to projects built on Hyperledge Sawtooth and Burrow. Or the Hyperledge developer communities

I have my few bitcoin in the website with the bitcoin address. And i want to transfer to other working wallet. Problem is the website is not opening its page. The name of website is https://tradebrite....

I have 20 XRP in a Ledger Nano and before I load everything onto it I want to test the recovery procedure so I am prepared in case something goes wrong down the track I have read the material here on ...

I would like to store my Bitcoin RPC passwords and usernames in environment variables, like: rpcuser=$RPC_USER rpcpassword=$RPC_PASSWORD Is this supported in bitcoin core? Can environmental ...

is it possible to send transactions back and forth between all 3 address types (legacy, segwit, native segwit-bech32)? Or is one of them not able to send to another?

Someone offered to trade for me through bitcoin. He said i should send a bitcoin to crytomine company then he is going to claim it from the company so that he trades it with a commission of 10% of ...

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 several wallets from 2009 and 2010 that have not been touched since day one.I recieved 25 dollars USD worth of BTC for downloading and running a program in the background. Im guessing i was ...

How can I registered for bitcoin trading? And secondly, I am a international business person and I want to know if I can transfer my money through bitcoin in any other currency to Euro? Thanks

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 ...

I have old wallet.dat files of Bitcoin, Litecoin, Bitcoin Cash, Omnicore. My Bitcoin Cash wallet.dat has unbroadcasted transactions inside, so I am afraid that others might also have unbroadcasted ...

When I try to open my node this is the error that pops up "Error: Cannot parse configuration file: parse error on line 1: curl https://bitnodes.io/install-full-node.sh | sh." Does anyone know how to ...

How do I move my btc qt wallet to electrum while syncing? Not address by address. Removed some addresses already but I'm still missing some coins. Don't understand the discrepancy. Any help would ...

A friend is looking for bitcoins seller ( more than 250) Transaction in live with the customer in the middle east.

How is the following case handled in bitcoin blockchain? Initially Alice has only 2 bitcoins. Suppose Alice sends 2 bitcoins to herself(tr1 i.e. Alice to Alice) and then 2 bitcoins to Bob(tr2 i.e. ...

The debug.log file is getting pretty big on bitcoind. How do you limit the size of the file? I'm on Ubuntu 12.

I want to create an exchange site using API. How can I check that my customer had a deposit without using a transaction number? I want to create a new address wallet per customer how can I do it? I'...

Does it check every block in between where the UTXO first appeared and the current time to make sure it didn't get spent then? Or is there some other caching or other method to make the check faster?

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 ...

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 am trying to configure the bitcoin core build , as I use make , I received the following issue . ~/Desktop/bitcoin$ make Making all in src make[1]: Entering directory '/home/fu/Desktop/bitcoin/src'...

Just finished syncing the whole blockchain after days and I realize the bitcoin settings were "pruning", which means I cannot use it as a wallet. is it the normal behavior of bitcoin core v0.19.0.1 ...

I made an account "hello" in bitcoin daemon and wanted to run this. Whenever i put in hello when prompted, getac1 would return empty array; whereas, getac2 and getac3 returns addresses associated with ...

I'm creating my own cryptocurrency and right now I'm trying to compile with the gitian the qt wallet for windows of it, but I've had this error from the beginning. Everything starts very well but ...

I am trying to create a raw transaction and send it to the testnet. I am using testnet keys and here is the simplified readable output from my script: decoded private key: ...

I'm trying to understand bip32 hardened mechanism, but I'm confused about it. I got xpubKey from this site, and what I'm trying to do is demonstrate failure when trying to generate child pubkey from ...

Someone who scammed me used this wallet to receive the BTC 12fmomENb5SSxR54Bitua71CZrc4oVQtmB he hasn't moved them from there since July 31st I'm trying to figure it if that wallet belong to any ...

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 have a plan to make cryptocurrencies highly decentralized without POW. It could also be used for bitcoin. I posted the document on medium.com. It seems only a few person have seen in these days. I ...

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 ...

Seems like the interest to work on sidechains has died in favor of Lightning and Segwit ( I might be wrong about this, that just seems to be the vibe I get from social media and seeing what kind of ...

Transaction number 2f1271a411b296ee2fbc5941809cbf4d4718a0c564de4a437f505073a92da3b8 Why have my not received the Bitcoin

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 "...

How to get both confirmed and unconfirmed transaction details of foreign(non-wallet) addresses from bitcoin-node server? Actually i have generated the addresses using third party library and sent some ...

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 ...

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 ...

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

In a world of pain at the moment. I downloaded Bitcoin Core, and before I realised I'd need the complete downloaded Blockchain, my friend transferred some coins to my address. I did some research ...

I'm trying to build a mini full node so that I can understand exactly how they operate. I've managed to get a few parts of the P2P api working however I am stuck with basic things like 'getblocks' and ...

Is the following definition of blockchain by its wikipwdia page correct? Where it is mentioned: A blockchain is a decentralized, distributed and public digital ledger ... Cannot we have a ...