Questions tagged [verification]
The verification tag has no usage guidance.
97
questions
1
vote
1
answer
52
views
Verifying the Pizza transaction in Python
A friend of mine and I are trying to learn how to read the bitcoin blockchain. We've gotten pretty much everything except the ECDSA verification that the coins spent actually belong to the person who ...
- 193
0
votes
1
answer
22
views
Was the "sideloaded" data verified by bitcoind during the value overflow bug?
As a response to the overflow bug 2010, Satoshi wrote this post asking people to download the blockchain (blk****.dat and blkindex.dat) from a specific user.
Patch is uploaded to SVN rev 132!
For now,...
- 295
0
votes
0
answers
22
views
verifying bitcoin core version 22.0 [duplicate]
I'm trying to verify the bitcoin core version 22.0 but when I verified it seems all the signatures are bad (I downloaded SHA256SUMS.asc and SHA256SUMS files from https://bitcoin.org/en/bitcoin-core/).
- 1
2
votes
1
answer
487
views
Unable to verify Bitcoin 23.0 release due to developer keys being untrusted/uncertified [duplicate]
I have precisely followed the instructions for attempting to verify the latest 23.0 release of bitcoind on Linux, available here: https://bitcoincore.org/en/download/
I have gpg imported all the keys ...
- 123
0
votes
1
answer
51
views
Using EQUALVERIFY with different public keys, but generated from the same seed
I am building certain system that involves Bitcoin and therefore I need to understand well how it works under the hood.
In order to receive funds, for every new transaction new public key and its hash ...
- 15
1
vote
3
answers
59
views
Why can't I modify someone else's transactions, if I have their signature data?
As I know, signature system is adding signature to end of transaction. And doesn’t hash transaction, so others can know my signature.
If I can send a message directly to the node, can I use other’s ...
- 11
0
votes
1
answer
55
views
How long is SIGHASH?
I am reading these two posts 1 2, and following step by step.
I almost understand, but I still have some questions.
Before signing, input script should be removed and replaced by pre locking script. ...
5
votes
1
answer
771
views
Verifying Block 124724
Just for my own educational purposes, I'm writing something that verifies the blocks on the blockchain. I had in my code this line:
assert coinbase_amount == block_reward + total_tip
And it succeeded ...
- 193
2
votes
1
answer
42
views
Are there possible attack/failure scenarios when no new nodes verify old signatures anymore (keeping the assumevalid defaults)?
This question came up in a recent discussion with Hasu and I was wondering if there is a good/practical reason why a newly syncing node should change the assumevalid option to 0 (verifying all the ...
- 79
1
vote
1
answer
576
views
Cannot verify Bitcoin Core 22.0 GPG
I am trying to verify that the checksums file is PGP signed by the release signing key.
I have downloaded the https://bitcoincore.org/bin/bitcoin-core-22.0/SHA256SUMS.asc
and imported keys with:
gpg --...
0
votes
0
answers
41
views
Transaction not confirmed [duplicate]
It is the first time I use Bitcoin.
I have made an transaction this earlier today. But the receiver informed me that they did not received the transaction on their end. I have looked on Blockchain ...
0
votes
0
answers
418
views
Do Wallets need to be verified or activated? Crypto Support asking me to do that [duplicate]
1.5Bitcoins were stolen form me in 2019, and a company Merawing contacted me a few weeks again, saying that they work with Crypto Regulation of Cyprus and that they would help me getting my bitcoins ...
0
votes
1
answer
112
views
My transaction is in review for over 24hrs on blockchain, I want to cancel it
Please I want to cancel my in review transaction on blockchain. How will I go about it. Please help me,I need answers as soon as possible.
- 1
0
votes
0
answers
49
views
Verify Bitcoin ownership
I saw a recent article supporting Craig Wright's claim to being Satoshi Nakamoto. Other articles about him suggest that most of the community believes he's a scammer, and not actually Nakamoto. The ...
- 171
0
votes
0
answers
18
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 ...
- 101
0
votes
2
answers
296
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 ...
- 13
0
votes
2
answers
127
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 ...
0
votes
0
answers
21
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
0
votes
1
answer
33
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 ...
- 1
1
vote
1
answer
77
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,...
- 61
10
votes
0
answers
490
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 ...
- 10.9k
2
votes
2
answers
257
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 ...
- 21
0
votes
1
answer
87
views
How can a receiver 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 ...
- 1
0
votes
1
answer
417
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
...
- 103
1
vote
0
answers
84
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 ...
- 151
0
votes
1
answer
931
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 ...
- 11
4
votes
1
answer
627
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 ...
- 43
-1
votes
3
answers
357
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 ...
0
votes
2
answers
469
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. ...
- 363
2
votes
1
answer
833
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 ...
- 109
1
vote
1
answer
109
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 ...
- 133
1
vote
1
answer
77
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 ...
- 19
1
vote
1
answer
411
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 ...
- 161
5
votes
1
answer
697
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?
- 103
0
votes
3
answers
666
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 ...
- 145
0
votes
2
answers
153
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 ...
- 125
1
vote
1
answer
887
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 ...
- 11
2
votes
1
answer
532
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 ...
- 75
1
vote
0
answers
104
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
0
answers
124
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 ...
- 101
2
votes
1
answer
772
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 ...
- 185
1
vote
0
answers
182
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?
- 11
2
votes
2
answers
3k
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 ...
- 23
2
votes
1
answer
227
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?
- 21
0
votes
1
answer
57
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 ...
- 113
6
votes
1
answer
827
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 ...
- 163
2
votes
1
answer
522
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 ...
- 21
2
votes
0
answers
46
views
Proving sendership of transactions
Why does Bitcoin Core, on the message verification tab, say that verifying messages signed by Bitcoin addresses "only proves the signing party receives with the address, it cannot prove sendership of ...
- 4,307
0
votes
1
answer
244
views
Chainstate database verification
When you download the blockchain, do you download the chainstate too or it has to be generated by your own machine (it says that theoretically can be rebuilt from the block data but it is time ...
- 221
1
vote
1
answer
527
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 ...
- 123