Questions tagged [verification]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
0answers
16 views

How are the transactions going to be verified after all BTC blocks are found? [duplicate]

If I understood correctly the current transactions are included in the generation of the next block, thus these transactions get verified. But what happens when all 21 million bitcoins are already ...
0
votes
2answers
37 views

Retrieving Old Transaction in Bitcoin Core's console -getrawtransactions returns “no such mempool transaction” error

I'm new to running a full bitcoin node. After almost a week I could download the entire blockchain. My computer is running 24/7 to support the cause. When I tried to verify some old transactions that ...
4
votes
0answers
114 views

How many bitcoin transactions can be verified per second on commodity hardware in 2020?

I am trying to figure out how many Bitcoin transactions could be verified per second. Am I correct that signature verification is more expensive than computing Merkletrees and hashes and therefore ...
0
votes
2answers
53 views

How would I prove that I own X amount of Bitcoin to somebody without violating my privacy or sending/risking any coins?

Now that people who own a full Bitcoin will be like people who currently own ten million USD or more in "liquid assets", I'm trying to come up with some way that I can safely and reasonably ...
1
vote
1answer
77 views

Running bitcoin node with already verified blockchain

I'm following this guide https://stadicus.github.io/RaspiBolt/ to setup a bitcoin full node on my new raspberry pi. I already downloaded and verified the blockchain on my host machine. I also pruned ...
1
vote
0answers
20 views

Help to pending Verification [duplicate]

In cryptofree.casa How Long Take to pending Verification is over please help My email is: Hosseinnassari84@gmail.com
2
votes
1answer
1k views

Mtgox account verification pending, how to withdraw my bitcoins?

I had submitted my personal document for verification over 30 days; however, my account still pending for verification, what I can do to withdraw my bitcoin?
0
votes
1answer
27 views

find a transaction [closed]

I made a bitcoin transaction and while I was typing in my email the window closed, so I didn't get my receipt. I have the phone number I used, one time password, wallet address, and the machine ...
0
votes
1answer
53 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
1answer
176 views

Address Verification Failed / View on Tresor Address don't Match

Using LTC wallet on new Trezor. On "Receive Payment" tab, clicking eyeball icon, the address shown on the Trezor does not match the address shown on screen. What gives? Did I already get hacked?
1
vote
1answer
48 views

Can you verify partial blockchain information from a third party, without yourself having an entire blockchain?

I'm considering consuming, or if unavailable, I'm considering providing, a bitcoin blockchain querying service along the lines of json rpc. Would it be possible for me as a consumer of such as service,...
-1
votes
3answers
197 views

Why do I have to deposit BTC as missing turnover

I accidently transferred BTC to a non existing wallet. The wallet is now being created and I have to activate and verify it. To activate and verify I have to deposit 4,9 BTC. Is that how it works? Why ...
6
votes
1answer
6k views

What is the block verification procedure, and will it ever become too expensive?

I'm trying to get a grasp on which items the network is responsible for validating / enforcing. If I understand correctly, when a new block is received, the recipient needs to verify the following: ...
1
vote
2answers
99 views

Multisignature technology in bitcoin - math and code

I am interested in the math and code behind bitcoin multisignature technology. I've been looking for actual code that creates a multisignature address/pub key, and verifies transactions/digital ...
0
votes
1answer
76 views

How to verify locking and unlocking scripts?

I've selected an arbitrary transaction id and retrieved its associated transaction details using the blockcypher explorer as follows: from blockcypher import get_transaction_details ...
1
vote
2answers
67 views

Do mined coins show up on blockchain explorers and can the balance of the addresses that mined the coins be seen?

Somebody wants to do a deal for a bitcoin transaction but when proof of the coins is required they say that the coins will not show up on blockchain.info as they were "mined coins". Is this really ...
2
votes
0answers
44 views

How verify (in C++) input signature?

First small problem: blockchair.com give me only output scripts, not input - is any blockexplorer online with it? I read binary data and this may be hard recreate my sample data and verify. I test BTC ...
1
vote
1answer
687 views

Bitcoin i have been asked to send money for a private key [duplicate]

Hi i have been asked to send money for funds that are nonspendable to receive a private key to unlock it, it's from bitcoin investing. How safe is this as i'm worried i wont receive the payment. It's ...
4
votes
1answer
485 views

Should I verify the Bitcoin Core release signing keys?

I have been running Bitcoin Core on an old Macbook for about a year, and I updated to v0.18.0 a couple of months ago which I downloaded from bitcoin.org. I have recently been delving deeper and I ...
0
votes
2answers
207 views

How Bitcoin dose find and verify UTXO ? is this efficient?

If Bitcoin sees all blocks, it will be very slow based on chain length and block size but, it can certainly verify incoming transactions. I know that blockchain is never modified any previous block. ...
7
votes
2answers
641 views

What is “Verifying last 288 blocks at level 3”?

Upon every start of bitcoind, I see the following in de debug log: Verifying last 288 blocks at level 3 come up. At this point, no new blocks have been downloaded and the block chain was 100% up to ...
2
votes
1answer
382 views

Verifying a bitcoin Signature and what is the transaction data that is signed?

Given a bitcoin transaction where it is able to redeem it's UTXO's, how can I verify in Java if the signature is actually a valid signature or not. I was trying to use the Bouncy Castle library where ...
2
votes
3answers
1k views

how do nodes verify that a block has been solved and can be added to the blockchain

when a miner solves a block it gets sent out to the network, when other nodes receive it, how do they verify that the block received was indeed solved and can be added to the blockchain. So you don't ...
7
votes
3answers
2k views

Is there a way to prove ownership of a transaction?

Is it possible to prove that you are the sender in a transaction? Prove this to 3rd-parties, not only the receiver.
1
vote
1answer
61 views

Transaction verification engine

In the Features of Bitcoin Core i found following Line: "Bitcoin Core includes a transaction verification engine" Please define Validation, is Validation = verify or not. Does the Engine verify ...
1
vote
1answer
181 views

bitcoind - how to find out what is affecting the verificationprogress

Problem Bitcoind verificationprogress continues to go up and down around .99999xxx and never finish verifying Background Looking for any insight here, had a node that went down and upon bringing it ...
5
votes
1answer
557 views

Block verification time

Does block verification time (by all nodes in the network) takes up a large portion of the total block propagation time? What is the percentage, on average?
7
votes
2answers
637 views

What alternatives are there to hardcoding checkpoints into the Bitcoin client?

Checkpoints seem like a crucial part of the security & validation apparatus in Bitcoin. Is there a written policy in place, among the developers defining the maximum interval between checkpoints? ...
0
votes
3answers
535 views

What are the realistic system requirements to run bitcoin core for generating wallets, signing and verifying messages on a laptop?

I need to be able to verify messages and check that funds in wallets are valid and that the claimed owner possesses the private keys (hence checking messages signed). I know that I need to be able ...
0
votes
2answers
138 views

Bitcoin Core LevelDB Index saves forked blocks

I've noticed that bitcoind will permanently save unverified blocks that it receives even if they turn out to be small blockchain forks, likely occurring from the relatively simultaneous discovery of ...
2
votes
1answer
216 views

Transaction verification process in full nodes

I'm having some trouble understanding the process of transaction verification on full nodes. I understand how a transaction is verified via public cryptography (hashes, signature, etc, as it's ...
6
votes
4answers
4k views

Can each Bitcoin and Satoshi be uniquely identified?

I'm pretty sure I've read somewhere that BitCoins have an "address", so they can be uniquely identified. What I want to know is: Does each Satoshi have it's own unique identity? How is the identity ...
1
vote
2answers
688 views

How exactly does a block get constructed and verified?

From what I understand, a new block contains all the transactions within the last 10 minutes. So when Alice sends Bob 10 BTC, how does this information get put onto the newest block? I guess I am ...
1
vote
1answer
638 views

How can one verify the address you are sending BTC to

I've had an incident with an exchange that provides addresses to deposit BTC funds. For some unknown reason, the exchange is telling me they have never received the funds. I read the address with a QR ...
5
votes
2answers
8k views

How do signatures work?

Just curious, if I send a transaction from one address to another, how do they verify it without knowing my private key?
2
votes
1answer
461 views

Using the Merkle Root to prove the integrity of a block's transactions

I understand that a Merkle Root is the hash of hashes of hashes (etc.) of transaction pairings within a block that ultimately results in one 'Root' hash. Changing anything about any of the original ...
1
vote
0answers
101 views

How long to verify transaction is not overdrawn?

Given that the block chain is 140gb now, how long does it take a node or a miner to verify that a transaction is valid i.e. Not giving negative balance for an address? Also, given that the number of ...
0
votes
0answers
121 views

Buying a coin only available on Bittrex (also Poloniex)

Is there an easier/alternative route to go about purchasing a currency that is only being traded on Bittrex? After attempting the basic verification, I received an error saying that there was NO ...
6
votes
1answer
723 views

Transaction verification by miner VS full node with & without SegWit

I'm trying to fill a few gaps in my understanding of transaction verification and would appreciate any insight. Without SegWit Miners broadcast new blocks which contain the signature(s) with every ...
3
votes
1answer
4k views

Miner username and password - does it need to be unique in the major pools?

Every Bitcoin mining pool relies on Basic Access Authentication to identify the user and credit their account for the work performed. But does this identification in form of username and password have ...
2
votes
1answer
598 views

Verifying a legitimate version of bitaddress.org on Windows

How can I make sure I am accessing (online) or have downloaded (as an HTML file or from GitHub) a legitimate, trustworthy version of bitaddress.org? In other words, how can I make sure no hacker has ...
25
votes
1answer
14k views

When a block is “discovered” how is the nonce determined?

I know that a block is based on a random number called a nonce, but if that number is random and unknown to the miner, how is that number actually verified as the correct nonce and not some arbitrary ...
8
votes
2answers
3k views

Different error messages under “Mandatory script verify flag failed.”

I've been playing with raw transactions and signed transaction and I've noticed that the error "Mandatory script verify flag failed" comes in two variations. script failed on OP_EQUALVERIFY OP Script ...
2
votes
1answer
255 views

What are zkSNARK parameters and how to verify them?

When installing the zcash client for the first time it downlods a bulk of around 900 MiB in zkSNARK parameters. I am wondering: why and what are they exactly used for? Is this a security feature? How ...
1
vote
0answers
176 views

Buying Bitcoins without verification and documents [closed]

I need to buy Bitcoins with Visa or MasterCard, but without verification and documents. The amount of purchase is large. Can you suggest such online services?
2
votes
2answers
2k views

Transaction verification vs block mining

I cannot clearly understand if the transaction verification is done over a single or double phase. This is my understanding. Once a transaction is completely assembled, its inputs and outputs ...
2
votes
1answer
17k views

GUI Miner no responses to getwork, and Verification failed

I just starting with mining today I have everything set up for slush pool on GUIMiner - v2012-12-03 . I'm not sure what is wrong but this is what the console says 2013-06-21 01:37:26: Listener for "...
0
votes
1answer
54 views

Do I have to try to mine bitcoin in order to verify peoples transactions?

I started investing in bitcoin about a year ago, did minor research and decided mining wasn't worth it because of the odds against finding a bitcoin. Lately I've started wanting to verify peoples ...
2
votes
1answer
466 views

why verification of transaction after proof of work?

I have question about bitcoin protocol. In Satoshi's paper it is mentioned that: New transactions are broadcast to all nodes. Each node collects new transactions into a block. Each node works on ...
1
vote
1answer
502 views

Understanding blockchain 'under the hood' how a block is created

Bitcoin newbie here: I'm trying to understand the concept of the blockchain but what I don't get is what's going on behind the scenes? So let's say that there are only 10 miners in the universe and ...