All Questions

0
votes
1answer
16 views

Unable to bind any endpoint for RPC server

I recently updated my bitcoin docker image to bitcoing v0.18.0 version and can't allow external rpc connections to it now. It binds to localhost if I set rpcallowip=X.X.X.X, then I tried to used ...
1
vote
1answer
516 views

Whatsminer event code E011

I have a whatsminer M3 working for the past 2 months with no problems at all, but yesterday it started acting strange since it is restarting every 15 minutes, all temperatures are fine between 80 to ...
0
votes
1answer
11 views

How to list transactions of an address on omni layer

I want to do something like what omni explorer do (https://omniexplorer.info/). It can list all transactions of a specified
0
votes
1answer
17 views

How to ./configure a built for Raspberry Pi?

I want to use this guide to set up a headless bitcoin core full node and came across the line: ./configure CPPFLAGS="-I/usr/local/BerkeleyDB.4.8/include -O2" LDFLAGS="-L/usr/local/BerkeleyDB.4.8/lib" ...
0
votes
0answers
8 views

1ML Node Rank ranking explanation

If there is an 1ML Node Rank ranking explanation anywhere ? My node is online 99.9% but "Availability" dropped down from 700 to 4000 in last 3 months. :( I guess this is somehow associated with the ...
0
votes
1answer
488 views

Where is the QR code listed in Electrum 3.0.3

Quick question...Where can I get the QR code for Electrum 3.0.3 where is it stored? I looked at the different tabs but NO luck Someone is trying to send me some coins and asked me for the QR code. ...
0
votes
1answer
21 views

The vanishing XLM! Help please?

This question is about my Bitcoin core wallet, I got XLM with the airdrop when the Bitcoin Core wallet added XLM to the wallet. Got it months ago now and its been fine just sitting there until today, ...
1
vote
0answers
15 views

Monero CLI experience is great. Is it possible to have the same experience with Bitcoin?

Am familiar with Monero, but not with Bitcoin. I know, that's a small demographic... Is it possible to have a Linux CLI-only Bitcoin wallet that connects to a remote node? I'm looking to have an ...
0
votes
1answer
16 views

How to code bitcoin transaction for shopping cart

I have written website shopping cart software using MySQL and PHP and I need to add a way for users to pay with Bitcoin. This seems like a basic need for developers in general, but I'm having ...
2
votes
1answer
150 views

Can Undercutting attacks be Mitigated?

An Undercutting attack as described in this paper, is a mining strategy which involves producing new blocks not on the longest known chain, but instead 'undercutting' the longest chain by building a ...
0
votes
1answer
15 views

Google Sheets Cryptofinance Add-on - is the company still operating?

I sent in some support emails since May 14 and have not heard back. Anyone aware if the developer is still operating this add-on for Google Sheets? Update, they replied today (May 23) ...
1
vote
2answers
69 views

How much data does it take to prove a given transaction exists on the blockchain?

As I understand the SVP protocol, a client can be reasonably certain that a transaction has been accepted on the blockchain if they know it is a member of a certain block, via the Merkle path, and a ...
0
votes
1answer
7 views

How do I start a bitcoind server in deprecated mode for multiple functions

I have a bitcoind server running bitcoin-core version 0.17. Now since I need to use deprecated RPC methods I need to start the bitcoind server in deprecated mode, so I am already able to run it to ...
0
votes
1answer
45 views

What are the published Bitcoin addresses of the Binance 7000 BTC hack from 2019 May?

Binance got hacked of 7000 BTC in May of 2019. I'd imagine all the chain analysis companies are tracking these tainted Bitcoins to see if it hits any exchanges for selling. What are these address? Is ...
0
votes
2answers
38 views

Where can I get bigger amount of test BTC?

We are conducting some testing with the end users of our application and I need a bigger amount of test BTC for it. Using faucets, I can get 0.1 or 0.01 per request with captcha, but I need something ...
0
votes
1answer
19 views

Understanding bitcoin-cli commands walletlock and walletpassphrase

I am trying to understand two commands listed in the following link. 1. walletpassphrase Stores the wallet decryption key in memory for <timeout> seconds. 2. walletlock Removes the wallet ...
1
vote
0answers
21 views

Enable dustRelayFee behavior on testnet to get error code 64: dust

Crafting and sending an utxo of 1 satoshi does works and get mined on testnet without error. However on mainnet the error code 64: dust arise. I understand the basic idea that you are not able to ...
2
votes
1answer
95 views

Why do we need to chain the blocks (creating blockchain) in a permissioned blockchain?

The main question is: What does "chaining block" mean in a permissioned blockchain? OR in any blockchain network in which creating a new block does NOT need consuming resources/energy ? (even in the ...
0
votes
1answer
19 views

Run specific RPC commands in PHP?

I'm trying to get the balance of a specific address in my PHP session, I currently have this: <?php require 'header.php'; include 'Includes/Bitcoin/easybitcoin.php'; $bitcoin = new Bitcoin('...
0
votes
0answers
8 views

How to communicate with encrypted bitcoin wallet using bitcoin-core in NodeJS

I have a full node running in my local system and I am using this library named bitcoin-core to communicate with the bitcoind server. Now I have encrypted my wallet with a passphrase so I understand ...
0
votes
0answers
12 views

Is “USDcoin.top” a legal cripto exchanger?

I have exchanged some BTCs through USDcoin.top. It took about 30 hours, But still not exchanged or received back to my Blockchain wallet. Am I going to lose my money? Can someone please explain to me ...
12
votes
2answers
5k views

Why do all addresses begin with “1”? Why can't we just delete it?

The title is the question :) All the addresses I have seen - from the very first block http://blockexplorer.com/b/0 to the very last one http://blockexplorer.com/b/229850 all begin with "1". Why is ...
1
vote
2answers
36 views

Is it possible to separate blockchain and wallet functions?

I'm looking for a way to use bitcoin-core in monero-way (It uses separate blockchain daemon and wallet daemon). I'd like to run bitcoin-qt interface on my laptop and connect to external node with ...
0
votes
3answers
903 views

Historical Crypto Data

I'm looking for for historical data on crypto currencies that tracks down to at least the hour if not 5 minutes for each day for at least the past year. I need OHLV price, and volume at a minimum for ...
-1
votes
0answers
21 views

CBOE Bitcoin Options

In this video, Tyler declares that options on Bitcoin can be traded over the CBOE. However, I haven't been able to find further information; everything Google returns is about Bitcoin futures. Is ...
0
votes
1answer
49 views

What’s the point of wannacry for exchanging Bitcoins to Monero?

At first glance, exchanging Bitcoin for Monero makes sense. But why use Monero with an exchange, which is likely to help the police? (And which did.) Monero transactions are private only on the ...
1
vote
2answers
26 views

How do I install a specific version of bitcoin-core

I need to run bitcoind version 0.17, however the latest available version is 0.18, if I follow the instructions from this link it installs the latest version. The below links lists the packages for ...
0
votes
0answers
749 views

Uneconomical UTXO requested

I'm using btc.com wallet and i want send 0.001 btc to another address but i'm facing with this error: Uneconomical UTXO requested [type: 1 (limit 6831), txOut.val: 5897, required: 98140] what does it ...
1
vote
1answer
110 views

Bitcoin cash wallet with ability to generate new addresses

I'm looking for a wallet that can generate new addresses. I've seen some wallets that do generate a new receive address for Bitcoin, but I'm not sure if a new address is used when Bitcoin is sent. I ...
0
votes
1answer
41 views

Blockchain endpoint working

I wanna clear this thing that how blocks are retrieved and created in from the nodes using an end point. The end point is basically centralized and have nothing to do with network if i'm not wrong. Is ...
0
votes
0answers
15 views

How can I automate bitcoin payments to multiple different wallets? [on hold]

I'm looking to automate Bitcoin payments to multiple different wallets, from one central wallet that I own. Allowing a customer to input their wallet ID before triggering an automated payment to ...
0
votes
1answer
28 views

How to track bitcoin transaction on PC

I am still quite new to Bitcoin, and my question may be a little bit stupid. So I am wondering how can I track the transaction or the newest block on my computer. I know there are tons of websites ...
0
votes
0answers
22 views

New block watcher

guys. I need to create bitcoin watcher, which will subscribe to new block event of bitcoin node and make some operations with mined transactions. For starting node I use bitcoind -testnet -datadir=/...
1
vote
4answers
2k views

Bitcoin public key to private key

I did go thru a lot of articles which say's It's highly impossible to break the bitcoin public-key and get a private key from it. I understand that the public key does hold some info of it's ...
1
vote
1answer
73 views

Hashgraph public ledger (51% attack)

I have some basic doubts about consensus algorithm like hashgraph. For instance, let's take Raft the simplest leader based consensus algorithm, we cannot use it in a decentralised setting because it's ...
1
vote
1answer
31 views

Is Block Finalization a valid development to remove the threat of 51% attacks?

https://www.reddit.com/r/btc/comments/bq8cqo/btctop_currently_has_51_hashing_power/eo2p4md?utm_source=share&utm_medium=web2x A recent comment from a Reddit user in response to BTC.top acquiring ...
1
vote
1answer
17 views

Mining Pools Transactions Fee

I am learning about mining pools and trying to understand their reward structure and transactions fees. Looking at the two largest pools, Antpool & BTC.com, as far as I understand AntPool uses ...
0
votes
1answer
27 views

Hash rate, transaction and block relationship

I'm aware that when the hash of the block header (block hash) is below the difficulty target, a block is deemed as validated. But because I've never run a bitcoin node before (will soon), I had a ...
0
votes
0answers
8 views

Restoring an HD wallet tree [duplicate]

I saw this question: How does restoring an HD wallet work? I think the answer fits to a chain wallet (Seed) and the process is different while it's on a tree. I still don't understand how the ...
-5
votes
0answers
19 views

What s the password for btc4gen.com [on hold]

Dont know how to download get the password for bitcoin4generator.dont understand encrypted or decryption to find the password
0
votes
1answer
20 views

bitcoind rest api tx endpoint

i am having a trouble with bitcoind REST API endpoint for retrieving transaction info. According to the documentation it should return confirmations among the retrieved data. But my bitcoind do not ...
0
votes
1answer
32 views

How can I calculate/estimate how quickly a machine can verify transactions on the blockchain?

If I have some machine with particular specs in mind (processor/memory/bandwidth), how can I estimate how quickly that node can download and verify transactions? In a quick search I wasn't able to ...
5
votes
2answers
12k views

How to generate a testnet address?

Bitcoin addresses can be generated on this site https://www.bitaddress.org, but the test network needs m or n at the beginning of the address, where can those be generated?
0
votes
1answer
33 views

Can anyone initiate a Blockchain transaction into the mining pool?

Let's say user A has public key P and corresponding private key P'. Can someone else initiate a transaction for public key P with some wrong private key, let's say P''? Once this goes to the memory ...
-1
votes
2answers
28 views

What happens if I send a XRP transaction to a blank TAG when I was supposed to send to a specifc TAG?

I sent XRP to a blank TAG while I was supposed to send to the éxchange's TAG. The address is the one from the exchange but the TAG was left blank. The exchange says that they can't recover the money. ...
2
votes
1answer
33 views

What if an intruder modify scriptSig to get the same hashMerkleRoot of a block?

What if an intruder try to modify the coinbase transaction of a block buried in the blockchain, writing as output some other address. The arbitrary content of the scriptSig field could be modified as ...
0
votes
0answers
24 views

Success rate on Bitcoin and Cryptocurrencies [closed]

It can be said ? Detailed information on statistics and how cryptography Can it be a reason for the success and failure of individuals in Bitcoin and Cryptocurrencies?
0
votes
1answer
37 views

What is the context in libsecp256k1?

I am experimenting with making a wallet for educational purposes, and would like to use libsecp256k1 directly. Aside from creating a context, and using it in calls, all I have perhaps learned so far ...
0
votes
1answer
18 views

P2P getHeaders message - how to get block locator hashes

I'm trying to build my own block explorer So that I need to use p2p bitcoin protocol. For that I'm using btcd (golang) lib. According to bitcoin book I have to send version message (and receive ...
0
votes
0answers
26 views

Accept mastercard visa but withdraw crypto

I want to start an online business and I want to make it global. I want people to pay their preferred way (using visa, mastercard or others) and I get that money in cryptocurrency (any) Is there a ...

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