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8
votes
2answers
1k views

How to get notification on bitcoin receive with bitcoin core

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 ...
2
votes
1answer
19 views

Positive or negative private key of a bitcoin wallet?

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 ...
0
votes
1answer
6 views

How many zeros must be in a bitcoin share for a pool to accept it?

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 ...
0
votes
2answers
27 views

Bitcoin UTXO discrepancy in calculation

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 ...
0
votes
0answers
9 views

What happens to bitcoins that are in a ponzi scheme wallet?

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, ...
1
vote
1answer
525 views

Is the fastest Bitcoin ASIC miner available today still profitable after block halving?

As the title says, I was wondering if the fastest Bitcoin ASIC miner will be profitable after block halving?
0
votes
0answers
14 views

Disecting bulletproof hex

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/...
0
votes
1answer
21 views

Storing Provenance details in Bitcoin Blockchain

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, ...
0
votes
0answers
16 views

My Bitcoins are lost in transaction

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,...
0
votes
0answers
10 views

Which is the suitable simulator for showing that transaction throughput has been increased while changing transaction structure in bitcoin blockchain?

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 ...
0
votes
0answers
12 views

Finding Hyperledger Projects [closed]

Please, can anyone direct my to projects built on Hyperledge Sawtooth and Burrow. Or the Hyperledge developer communities
0
votes
0answers
17 views

How to transfer bitcoin to other wallet [closed]

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....
2
votes
1answer
632 views

Recovering a Ripple wallet on Ledger Nano

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 ...
3
votes
1answer
264 views

Does bitcoin.conf expand environment variables?

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 ...
2
votes
2answers
35 views

Are all three Bitcoin address types interoperable (legacy, segwit, native segwit)?

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?
1
vote
1answer
24 views

How do i differentiate between a scam and a real bitcoin miner?

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 ...
3
votes
1answer
276 views

A security need for Bitcoin to fork to quantum resistant algorithm in a few years?

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 ...
0
votes
1answer
28 views

Sweeping paper sweeping private keys from 2009-2010 into electrum wallet

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 ...
0
votes
0answers
22 views

I don't know how to use bitcoin [duplicate]

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
2
votes
1answer
586 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 ...
0
votes
1answer
57 views

How to get the private keys out of old wallet.dat without syncing blockchain

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 ...
0
votes
1answer
20 views

Opening Full node

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 ...
0
votes
0answers
17 views

how to move my Bitcoin core wallet to electrum while syncing

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 ...
-1
votes
0answers
19 views

Looking for a bitcoin seller [closed]

A friend is looking for bitcoins seller ( more than 250) Transaction in live with the customer in the middle east.
0
votes
0answers
21 views

Double spending problem 2.0

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. ...
9
votes
3answers
4k views

How to limit the debug.log file while running bitcoind?

The debug.log file is getting pretty big on bitcoind. How do you limit the size of the file? I'm on Ubuntu 12.
0
votes
1answer
29 views

How to generate new address wallet ? I want to use it per customer

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'...
0
votes
1answer
15 views

How do nodes validate that a UTXO in a new transaction is unspent?

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?
-1
votes
2answers
55 views

Double spending problem in Bitcoin

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 ...
2
votes
1answer
407 views

Bitcoin Difficulty granularity

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 ...
2
votes
2answers
469 views

Issue on configuring the bitcoin core build on Ubuntu-18.0.4

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'...
1
vote
1answer
52 views

Bitcoin core v0.19.0.1 automatically prunes?

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 ...
0
votes
1answer
65 views

Prompting an account name

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 ...
-1
votes
0answers
12 views

Error compiling with gitian can you help me? [closed]

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 ...
0
votes
1answer
93 views

broadcasting error for raw bitcoin transaction testnet

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: ...
1
vote
1answer
33 views

Why hardended xpub key cannot generate child public 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 ...
1
vote
2answers
67 views

Wallet forensic

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 ...
0
votes
1answer
28 views

How can a reciever verify that transaction data was not altered by 3rd party?

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 ...
-2
votes
0answers
17 views

How to contact the technology experts?

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 ...
0
votes
0answers
7 views

How can I do CDataStream to String to CDataStream conversion?

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 ...
2
votes
0answers
59 views

What happened to Sidechains [closed]

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 ...
0
votes
1answer
34 views

Bitcoin confirmed but have not received anything [duplicate]

Transaction number 2f1271a411b296ee2fbc5941809cbf4d4718a0c564de4a437f505073a92da3b8 Why have my not received the Bitcoin
0
votes
1answer
33 views

Error while syncing with the blockchain on my Raspberry Pi

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 "...
0
votes
2answers
50 views

How to get both confirmed and unconfirmed transaction details of foreign(non-wallet) addresses from bitcoin-node server?

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 ...
0
votes
0answers
27 views

How do I build a blockchain/cryptocurrency that uses 4-8 bit encryption instead of 256 [closed]

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 ...
1
vote
1answer
65 views

What is the length of largest known reorganization in bitcoin?

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 ...
0
votes
1answer
16 views

Transfer of BTC the wallet address p2pkh to wallet address p2sh

Is it possible to send BTC from wallet having address type p2pkh to the receiver wallet address p2psh
7
votes
2answers
25k views

How do I get my public address in Bitcoin Core?

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 ...
1
vote
1answer
21 views

Bitcoin P2P API getBlocks always returns 500 inv items

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 ...
0
votes
4answers
81 views

Is blockchain always “public”?

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 ...

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