All Questions

0
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0answers
1 view

What does “Nonstandard output” mean on Tradeblock transaction page?

I tried to send bitcoin but the recipient hasn't received it. The trade block page shows "Nonstandard output" under outputs as shown in the link below: Tradeblock page for transaction I used an ...
0
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0answers
4 views

How to know if I have earn funds or lost funds with the answer of a node or Electrum?

I am using ElectrumX I am developing a cryptowallet, and when I ask for the historic data about a specific XPUB I get a list of transactions id, and when I ask for the information of those ...
0
votes
1answer
10 views

How to reduce disk-space requirements of Bitcoin Core wallet?

I want to install Bitcoin Core wallet on my computer, but his blockchain is too big (more 230 Gb). How to reduce Bitcoin Core wallet?
0
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0answers
9 views

very frequent blocks on testnet3

I see very frequent blocks on testnet3: more than 18000 since 2019-02-18T06:28:34Z, it's one per 1.76 seconds average. blockcypher.com states that highest block is 1458714, but my node got 1475843+. ...
-6
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0answers
13 views

Annual Blockchain & Bitcoin Conference Prague by Smile-Expo will once again take place in the Czech Republic

The Czech Republic will host Blockchain & Bitcoin Conference Prague March 22, 2019 for the fifth time – the event about blockchain and cryptocurrencies organized by Smile-Expo. The conference will ...
0
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0answers
7 views

How do I connect my `bcoin` wallet to `bitcoind`?

I have bitcoind running in regtest mode. I want to connect my bcoin wallet to it and retrieve all UTXOs relevant to the sender's address. How can I do that?
0
votes
2answers
20 views

why 'increasing the block size above 1 MB requires a hard fork.” actually not require fork?

in this link, they say “increasing the block size above 1 MB requires a hard fork.” In this example, an actual block chain fork is not required—but it is a possible outcome. but i can't ...
2
votes
2answers
97 views

How to confirm how many peers a node has?

When a node requests one of it's neighbours for a list of it's peers, that node responds with a list of all of it's neighbours. I'm just wondering is there a way to confirm that those nodes are ...
0
votes
1answer
20 views

If miners are creating their own mining algorithms or using something standard

From this: the arrival of a new block has special significance for a mining node. The competition among miners effectively ends with the propagation of a new block that acts as an announcement of a ...
0
votes
1answer
17 views

How to broadcast bitcoin non standard transaction

I need help broadcasting a non standard transaction transaction.
0
votes
1answer
21 views

When you need to validate a transaction is in a block

So after getting here, I have forgotten why you even want to validate a transaction is in a block, and how exactly this works. Wondering if one could explain In what situation you want to validate a ...
1
vote
1answer
14 views

What does -server option do?

What does the -server option do in bitcoin node? https://en.bitcoin.it/wiki/Running_Bitcoin says 'Accept command line and JSON-RPC commands'. However I can't see any difference whatsoever. In both ...
2
votes
1answer
28 views

Why every node needs to validate a transaction in Bitcoin

I am just understanding the Bitcoin network, and now understand that every block and every transaction is propagated to every node in the Bitcoin network (not sure yet the difference between full vs. ...
0
votes
1answer
31 views

Why the blockchain isn't just a Merkle tree

I am reading this and now wondering why the blockchain isn't just implemented as a Merkle tree, or the reverse, why you can't just have a single data structure (i.e. a transaction chain) instead of ...
0
votes
1answer
20 views

If all Proof of … systems use mining

I understand how Proof of Work (PoW) works now, and am beginning to look at different Proof of ... systems like these: Proof of Stake Proof of Ownership Proof of Existence Proof of Space From what I ...
0
votes
1answer
29 views

Transaction created, but txid not found on blockchain explorers

Transaction created as same others, but status - 0/unconfirmed And txid nod found in block explorers Transaction ID: e9c858f852a1de7c70e6f8377f2147f3def1d4b1d85a5947d028bb9c13450318 How to succefuly ...
0
votes
1answer
36 views

Why UTXO is indivisible [duplicate]

I am new to understanding Bitcoin, but just read this: If an UTXO is larger than the desired value of a transaction, it must still be consumed in its entirety and change must be generated in the ...
2
votes
1answer
17 views

Could you open a lightning channel in a confidential transaction?

On an elements sidechain (e.g. liquid) could you open a lightning channel with a confidential transaction. You could probably open a payment channel but could the channel 'speak' to other channels? Or ...
1
vote
1answer
17 views

How to run a private bitcoin network with low difficulty?

I want to test and develop an open source mining pool. I don't have access to an ASIC miner or GPU, so I have to use my CPU to simulate mining and see how the pool really works. The problem is the ...
0
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0answers
21 views

Correct breakdown of the name of secp256k1?

sec Standards for Efficient Cryptography 256 256bit prime k1 Koblitz curve no. 1 ?
0
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2answers
27 views

Why the transactions are put into blocks in the first place

I understand how transactions are grouped into blocks. However, I don't understand why this is necessary in the first place. If it's a mining thing, I don't see why the miners can't just update the ...
0
votes
1answer
21 views

transaction's limits

I'm new about this market and I don't know if there's some limits about the transactions on the copay wallet. I think to use this wallet for personal and business transactions. Someone can answer me ...
0
votes
2answers
16 views

How long a high-priority transaction takes to evaluate

I am missing something so far in reading this (excellent resource). I read the part about transactions for the most part, but I don't understand the actual code evaluation part, and how long it takes. ...
2
votes
2answers
53 views

Example of data that is hashed in the merkle tree for a transaction

So I am reading this (excellent resource) on the Bitcoin merkle tree for a transaction. The merkle tree is constructed bottom-up. In the following example, we start with four transactions, A, B, C, ...
0
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0answers
14 views

Examples of transaction aggregation or how low-level it gets

I am thinking of a simple sum operation, which entails iterating through a set of integers and calling add for each. But the add operation could be implemented using complex stuff for handling BigInts,...
0
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0answers
10 views

Examples of systems having multiple blockchains

When you first learn about blockchain it is made out to be a single public blockchain that contains all transactions from all users. But when you start considering privacy and performance, it seems ...
0
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0answers
22 views

How blockchain privacy works

I have just read this which talks about creating private blockchains and using a unique public/private key per transaction so you can't be traced. There are also "Zero-knowledge proofs" which I'm not ...
1
vote
1answer
111 views

How specific are ASIC's design? Can they single hash SHA256?

I understand that Bitcoin's ASICs are a highly optimized piece of equipment and, therefore, are also very specific. My question: are they able to do a single (or triple?) SHA-256 hash at all? And, ...
1
vote
0answers
10 views

Can't Run Bitcoin Wallet After It was Downloaded on Windows 8.1 Desktop

Please help. After downloading the Bitcoin wallet, I don't have the option to 'run' it on my windows 8.1. It was a compressed file, and even though I extracted everything, there is nothing that ...
2
votes
1answer
15 views

LND errors after upgraded to v0.5.2

Recently upgraded to the latest lnd version (following the stadicus guide) but once i restarted the client i keep getting this error when i check the logs: [ERR] LNWL: Failed to process consensus ...
1
vote
0answers
17 views

Does everything of a Blockchain Network rely on its underlying “Consensus Protocol”?

I have been reading about and researching on Blockchain Technology for quite a while now, and what I can comprehend from the very primitive architecture of these "Distributed Databases" is that ...
-4
votes
0answers
29 views

How to create coins from a cloned POW/POS altcoin

I have successfully cloned a POW/POS coin based on compound coin, generated the merkleroot and genesis block and a running gui wallet on Ubuntu 16.04.  The question now is how would I start to pre-...
0
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0answers
14 views

Why does the ant miner t15 powered off suddenly after running 10minutes?

So I just bought this antminer t15 and when I powered it on, It was working fine, I was able to set it up, I located the ip of the device then I configured the pools in ant pool.com , had to update ...
0
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0answers
22 views

blockchain wallet showing transaction but wallet is zero

hi send btc from binanace exchange to new blockchain wallet account and transction showing in btc history in blockchain wallet but btc wallet balance still zer0 value i did btc 4 transaction binance ...
0
votes
1answer
40 views

where is bitcoins?

I have bitcoin core wallet 17.1 I sent 85$ to 32yF1MuqbUmKsGZE7jedkZV8PVJRuimRAu to one of my wallets but all my wallets shows 0 balance, why? https://www.blockchain.com/btc/address/...
0
votes
1answer
33 views

what is the latest required hash rate to mine a block? [duplicate]

What is the latest required hash rate to mine a block of bitcoin ? How much power do you need to mine a block in a day ? Thank you
1
vote
0answers
44 views

Why the address changes after each transaction? [duplicate]

Could you please help me understand these observations related to Bitcoin transaction? I have setup a brand new wallet from scratch and I sent 0.0246 BTC to it (well, slightly more but after the fees ...
1
vote
0answers
16 views

How is the fault tolerance measured?

“If the number of nodes that agree exceeds 2/3, the blocks or transactions of clients will be accepted” Practical Byzantine fault tolerance (pBFT) : (n - 1) / 3 I read those 2 things in a PDF that a ...
0
votes
1answer
37 views

Name of the country receiving the bitcoin currency

Can a country be determined to whom the bitcoin is sent?
0
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0answers
14 views

Byzantine fault tolerance and blockchain: Can this work? Feedback [on hold]

I’m a software developer and I was wondering if this can work (According to my point of view it could work but I’d like to get some feedback) Two types of Nodes: Proposers, Validators. 1) Proposers ...
7
votes
2answers
68 views

BIP44: What's the use of internal addresses?

I've read other questions (and their answers) on this but I still don't see the use for internal addresses. I get that you're supposed to send the change of a transaction there but I don't see how ...
0
votes
0answers
25 views

I send some bitcoin and now it is not confirmed at all [duplicate]

bitcoin core 17.1 https://www.blockchain.com/btc/tx/c6b5d45821f8aad166eb0c6afc9826df5710235a8576b952d606f49cd82a27f9 what is the best way to solve this issue?
0
votes
0answers
16 views

Byzantine Fault Tolerant - what a benefit? [duplicate]

According to wiki, if we had m generals, than we need 2m+1 to meet consensus. So it's about 66.6% + 1 generals But what the reason to use consensus like BFT? Why we can't get result of the most (50%...
2
votes
1answer
25 views

Whats the difference in way you installing full nodes

I'm newbie in blockchain world, so I'm curious what is the difference between installing full node by using libs such as bitcore-lib (using node.js) and installing it through the daemon (mentioned ...
0
votes
1answer
25 views

How to Bitcoin Core daemon start automatically each time your reboot your computer.?

In the official document of bitcoin.org, they ask to use an init script instead of cron job, see the init scripts directory in Bitcoin Core’s source tree. But the link is not working Bitcoin Core’s ...
1
vote
1answer
25 views

off-chain payment channels: Do we need to trust “Payment Service Providers”?

A paper entitled: "Privacy in Bitcoin Transactions: New Challenges from Blockchain Scalability Solutions" has tried to investigate privacy issues of the Bitcoin influenced by the solutions for ...
1
vote
1answer
61 views

Can the Bitcoin network boycott a misbehaving miner?

If a miner misbehaves, can other miners “boycott” him/her by refusing to build on top of his/her blocks in the future? Will such a “boycott” keep the miners from behaving badly?
0
votes
1answer
16 views

Is it possible to generate(mine) a block with specific transaction via bitcoin-cli on regtest?

I want to generate a block with specific transaction via bitcoin-cli on regtest. The "generate" command does not have the option. It collects transactions in mempool by the default rule. I guess I ...
0
votes
1answer
17 views

How find own address in testnet using bitcoin-cli?

I have bitcoin-core installed, I am running it in testnet mode. Now if I want to fund my wallet, I need to know the receiving address. How do find my receiving address, so that I can fund it and then ...
0
votes
0answers
8 views

Electrum Linux run without sudoers installation

How to easy run Electrum wallet without its installation on Linux? I want to run it from a single user account with no sudo. It is possible?

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