All Questions

Do the current Bitcoin opcodes and transaction size limit allow constructing a UTXO which is only spendable if a specified amount of work has been performed? So the spender, would provide a nonce as ...

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 ...

Wikipedia says "Nakamoto created a website with the domain name bitcoin.org" and "transferred several related domains", while bitcoin.org says it was "originally registered and owned by Bitcoin's ...

As pointed out by many lightning developers in the past (e.g. Rusty's 1 million channel challenge) the gossip protocol is quite noisy and a part of the BOLTs causing many engineering challenges. ...

My question is about the changes to bitcoin done by commit range [a75560d8, 6ff5f718], and their effect on consensus. Out of this range of four commits (all attributed to satoshi) during the dates ...

Are there any examples of sidechains which target a block time much longer than bitcoin? Could a sidechain be made "slow enough" such that the size of a proof (SPV proof?) for it could actually fit ...

I read on bitcoin-dev that CHECKSIGFROMSTACKVERIFY (CHECKDATASIG in BCash) can be used to emulate new sighash flags. How would that work, concretely? As an example, please provide an example update ...

I have managed to lose 5 words of my 24 word Ledger Nano S recovery phrase. I have words 1-19 but I am missing words 20-24. I have significant holdings on the wallet so would very much like to recover ...

I am studying the MuSig protocol and am having trouble grasping certain segments. This is my understanding thus far: In current Bitcoin CHECKMULTISIG format, the size of the signature grows linearly ...

Let's say have 3 inputs (alice, bob, satoshi): 0.3, 1.3, 1.6. We can mix these inputs for example like this: 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.3, 0.1, 0.1. Or like this: 1.3, 1.3, 0.3, 0....

I'm playing with bcoin cli and created lots of wallets. Is there any way to remove wallet via WalletDB Api?

As we know , Bitcoin core-Regtest is used to set up our own blockchain starting from Genesis Block. I have created Two nodes on my localhost running on different ports (I am using Windows 8.1). They ...

I want to call chainActive.Tip()->nHeight in core.cpp. It is not possible, I am interested in every idea. https://github.com/LIMXTEC/BitSend/blob/DEV-joshafest/src/core.cpp Here is an example : ...

I'm trying to find the set of bitcoin addresses from a public key associated with a user just to analyse this user transaction. Is there any way to derive/find all the addresses that have been ...

I am trying to create a transaction on the bitcoin testnet, using bitcore: Error Message : SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data Here is my code: var ...

I am currently trying to set up an application using the BTCJam api. I think the api could be very useful, but I have been unable to get it to work fully, and since support isn't responding, I thought ...

According to this page: https://en.bitcoin.it/wiki/Poolservers bitcoind's rollntime support is 'Supported, but not advertised'. I am taking that to mean that it doesn't provide the X-Roll-NTime ...

I am using BitcoinJ for my java application which fetches the test network's genesis block. I referred to the basics mentioned at JavaWorld and BitcoinJ's Google Code wiki. I am able to get it ...

What is the best operating system configuration for a computer to run (bitcoind or bitcoin-Qt) and (BFGminer or CGMiner) under Linux, assuming that it will be connected to a 3 Terrahash mining rig on ...

Recently it's reported that Bitcoin Core will disable BIP70 support by default in the next major release (0.19.0): https://cointelegraph.com/news/sorry-bitpay-new-bitcoin-upgrade-proposal-disables-...

Peter Dettman notes that ECDH peers can waste each other's time at will. What does he mean? Can this be weaponized against Lightning nodes?

Creating an app that utilizes estimatesmartfee, and it works in production, but I use regtest for automated testing and can't get it to return a value. Looking at bitcoind tests it is splitting UTXOs ...

How does Coinbase/GDAX calculate the "Volume" in candle data? I'm pulling data from the GDAX API in 2 ways; 1, by requesting candles similar to this endpoint, and 2, by tallying up raw tick data from ...

I recently experienced a I/O error resulting in data block corruption or index corruption cause bitcoin-qt wasn't quitting so I forced bitcoin core to shutdown without killin it properly. I checked ...

I am using Bitcoin core 0.14.1 testnet. I created a Segwit address. transfer some coins to this address. Now I want to spend it. I created a raw transaction using console command i.e. ...

I have a friend in the USA who can send me bitcoins. The idea is to sell the bitcoins in India and wire him back the money from the sales proceeds in India. What are the tax implications on the sale ...

Has anyone else gotten an electrumx server up and running lately? I have just gotten to the point where I'm not seeing any errors during "# service electrumx status", but I'm also not seeing my ...

I need to capture and store the raw transactions coming through my local full-node bitcoin instance. I read here that it is possible, but there is no mention of the particular RPC calls. I also see ...

I have used this code. It returns a success, but does not send bitcoin. var txRepo = new NoSqlTransactionRepository(); // Let’s me introduce you, Alice, Bob, Satoshi, and Nico with their ...

Is there any help/tutorial on how to build the Merkle root from stratum data? The Slushpool's stratum protocol has an example of a mining job but it does not contain any Merkle branches and I don't ...

I know that maybe it's a bit early to start asking Wallets to implement Lightning Network connections even if the majority don't support SegregatedWitness yet. But how about Payment Channels? In ...

I'm using bitcoinj from a Scala application... and when I start it, I always get the following errors: [error] o.b.c.Context - Performing thread fixup: you are accessing bitcoinj via a thread that ...

Anyone here using cryptocompare api? Where would be the best place to ask questions about it? I am just starting with it and for example I have stumbled upon few issues. Like, coin tickers with an ...

I read in this Github pull that Bitcoin relies on weaker cryptographic guarantees than SHA256. What are the weaker cryptographic guarantees being referred to? Could it be that RipeMD is 160 bits? ......

Is there a forum post or website where all the altcoin networks.py settings are being shared? I can see the P2pool forks on Github where people commit their own networks.py settings back to their own ...

Is there any possibility to explore transaction chain via Original Bitcoin API (https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_Calls_list) as the blockexplorer does it. If not, why?

I have 2 servers running: Ubuntu 18.04 running bitcoind daemon (v0.18.1 full blockchain synchronized) Ubuntu 18.04 running esplora (the local single page website works, but it has no data from the ...

I’m new in code develop and I’m studying it by myself (books, tutorials, official help of sites…) since a year VB.NET. A lot of information I read is in C# that I rewrite in VB.NET. I’ve started four ...

I'm interested in finding paths from senders whose node you don't run to potential receivers. According to https://api.lightning.community/?python#queryroutes , you can do that by specifying the ...

I am running bitcoin full node in a centralized server. I have many web applications running in various places. I want to connect this web applications with centralized full bitcoin node. How to ...

In sendmany there is a conf_target parameter with the comment "Confirmation target (in blocks)". Does that mean that Bitcoin Core implicitly calculates and sets a smart fee for a given block target? ...

I have at least two open channels, one of which has inbound capacity and the other has outbound capacity. How can I find a route and construct a payment to rebalance my channels against each other ...

the btc core wallet let me choose my own passphrase with 12 -16 words. the latest would be late january early febuary 2009. what wallet was i using? I cant find a reference online. everyone says that ...

Yesterday was publicised as a "Proof of Keys" day when people with accounts on Bitcoin exchanges were urged to withdraw their balance into a stand-alone wallet for the day as a test whether the ...

I compiled bitcoind using the same steps as last year. In particular I set DB_CONFIG: set_lg_dir database set_lk_max_locks 537000 Unfortunately once I hit block 364,670 (2015-07-10) I'm treated with:...

I'm attempting to do some research surrounding orphaned blocks within the Bitcoin network. From my understanding the best and really only way to obtain data for blocks that no longer exist in the main ...

Is there is any python library is available that allow creation of Multisignature HD wallets ?

I got the bitcoins but it's not getting added to my wallet, I even got the email etc. and it shows up but see this Transaction is not available at this time

I have forked PIVX and generated new genesis block hash, merkle root and nonce, and changed the rewards parameters. It compiles fine and the daemon starts, I have even got 2 nodes connected, but ...

Some currencies such as Monero and Zcash focus on protecting user privacy as much as possible. What information is available from the blockchains of these currencies? Number of wallets? Transaction ...