Questions tagged [validation]

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How do offchain transactions get validated/confirmed whilst using Lightning network?

How do offchain transactions get validated whilst using Lightning network?
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2answers
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Cryptocurrency exchange needs more info than any bank or brokerage firm?

I wanted to quickly sign up for a cryptocurrency exchange today to act on some info I found out about a low-cost coin (hahahah, quickly. how naïve). In signing up for the account, I got to a step ...
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1answer
68 views

How are transactions verified by nodes other than the initial receiver?

If I understand correctly, when I create a new transaction from my wallet, I have to sign it and encrypt it. My wallet encrypts the message using the public key of the node it is connected to, so it ...
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1answer
38 views

In a chain split scenario (not soft fork), a miner has to confirm transactions from both chains?

In a scenario where a chain split occurs (two miners find a hash), would miners have to work with both chains until one of then become larger (more PoW)? i.e. Would they have to validate transactions ...
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1answer
401 views

Why is it hard to fake proof of work?

Does someone understand this? "Because of all this work, when a Bitcoin client signs on to the network it can trust the block chain that was most difficult to produce (since this is evidently the ...
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1answer
315 views

Difficulty to Hash Validation Correlation

In the validation of a block it is said that a miner has a valid block if the transactions can be tracked in the chain and the hash of the block header is less than the difficulty. I am having a hard ...
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1answer
90 views

Block validation files?

Which part of the code is responsible for validating blocks? I'm working on a BIP to modify the structure of block.h, and I think that would definitely affect the validation process. Can anyone point ...
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1answer
903 views

How to make sure, Bitcoin private key and bitcoin address generator tools are generating valid key pair?

I find lots of tools/scripts written in python which can generate random number then using this random number it generates Bitcoin Private key(WIF) -> Bitcoin Address pair. I have tried verifying ...
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1answer
72 views

separating proof of work from mining possible?

I (think to) understand that proof-of-work is the process through which transactions are verified and the health of the network is being ensured. I also (think to) understand miners get bitcoins for ...
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1answer
35 views

What does net_processing cover conceptually in the Bitcoin Core codebase?

What does net_processing (.h and .cpp) cover conceptually in the Bitcoin Core codebase?
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1answer
24 views

What is cs_main? Why is it called cs_main?

What is cs_main? Why is it called cs_main? This question was asked during the May 12th 2021 Bitcoin Core PR review club hosted by John Newbery on a Carl Dong PR to de-globalize ChainstateManager. (The ...
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0answers
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TX Validation: Can a miner choose specific tx to validate from mempool? [duplicate]

I have made two TXs few days back and they remain unconfirmed so far. Can I be a bitcoin miner and validate them myself? And what happens if it remains as it is? There are some big amount of utxo ...
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1answer
64 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 ...
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1answer
71 views

Link to Algorithmic behind signatures verification [duplicate]

Does anyone know a good paper where the process of signature verification is explained (message+signature+public key = valid/not_valid) ??? And I mean it at a low level, with the code or pseudo-code ...
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1answer
51 views

Do miners check whether a transaction is segwit or non segwit?

When a transaction is pushed directly to a miner does it check whether the transaction is segwit or not or only if it is valid?
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3answers
541 views

Validation of New Blocks [duplicate]

Basic mining question: Once a miner solves the block and comes up with the block hash, how are the other nodes in the network incentivized to validate that hash?
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0answers
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How to send an invalid transaction for testing purposes?

How could I send an invalid transaction—for testing purposes, such as with testnet or regtest? For example, I would like to to try to double-spend, spend non existent coins, etc.
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1answer
48 views

Validation methods beside POW etc

Are there other concepts for the validation of the next added block to the blockchain beside POW, POS etc.? Of cource there are, but is there a methode that is shining out of the mass? A methode that ...
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1answer
45 views

What will happen on creating a transaction with negative amount?

Bitcoin in short is a public ledger guided by consensus of its nodes. In theory, if there is no validation of transaction amount, if we were to create a transaction with negative amount, that would ...
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1answer
54 views

Reading a block

I am trying to grasp basic concepts and wanted to know if miners can read contents of a block, if not, how is block validation done. As I understand each transaction is encrypted, how is decryption ...

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