Questions tagged [transactions]

This tag should be used for questions related to transactions. Transactions are signed messages regarding the transfer or generation of bitcoins. They are broadcast throughout the Bitcoin network and, if accepted, integrated in the blockchain.

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Can a node be maliciously programmed to validate all the transactions coming from a specific entity?

In a blockchain there are miner nodes and validator nodes. The job of a validator node is to validate transactions to be included in the mempool, broadcast or propagate the transaction for the other ...
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I WAS SENT BITCOINS IN A WRONG ADRESS ( the last digit is missing in the adresse )

i sent my wallet at coinbase to the sender today 355CXardXvii8T4MNbBaQbfJD7YQNdUf5a but the sender sent to a wrong adress 33 digits missing the 34th digit 355CXardXvii8T4MNbBaQbfJD7YQNdUf5 will the ...
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why do we need to hash before we use a private key to digitally sign a transaction? isn't just using a private key enough?

why is a hash needed for digital signatures? isn't it redundant since the point of hashing is to ensure contents are not tampered with , which the digital signature can do as well (on top of ensuring ...
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How to listen to deposits and confirmations of bitcoin transactions

hello I am building a web application using nodejs, bcoin and my application provides the user with a bitcoin address in which to deposit funds, I would like to know how I can listen on my nodejs ...
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Invalid transaction. Error: TX decode failed. Make sure the tx has at least one input

I'm using bitcoinlib for python to create a transaction and send it but I'm getting the following error: Funds not sent, exception error: Error connecting to blockchair on url https://api.blockchair....
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2 answers
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Why is the previous output index 4 bytes?

Using this post to define the format of a transaction: Create Output with a bunch of input Why is the previous utxo index (also called the previous output index) 4 bytes? The maximum output index ...
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Watch incoming transaction with node.js

I would like to watch a set of Bitcoin addresses and be able to execute some logic as they receive a payment. According to this answer it can be done using blockchain.info: const Socket = require('...
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3 answers
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why does the number of transactions per block reduces with increase in transaction fees?

While looking in mempool i saw with increase in sat/vbyte the number of transactions decrease. are they somehow related?
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2 votes
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Meaning of "Drop the signature" comments in OP_CHECKSIG code (Bitcoin v0.1.0)

I'm doing my homework by reading the C++ code of the 0.1.0 release of Bitcoin available here. I'm interested in better understanding how to validate transaction 1 of block 170. This transaction has ...
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-3 votes
2 answers
501 views

How to derive the Private key when the two the nonces are k and k*2

Is the same private key using k and k*2 respectively in two different signatures vulnerable? If yes How to calculate the key in this case Here is an example, Both signatures are valid and the nonce of ...
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3 votes
1 answer
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What is the standard logic behind the ordering of outputs in the vout array for a transaction?

This question and its answers discussed the meaning and purpose of the vout array of a transaction in good detail. However, I have so far not been able to find any good information about how outputs ...
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Does Bitcoin have incentives for relaying transactions?

Let's suppose that I can only reach one anonymous node in order to communicate my transaction to the rest of the network. The reason could be related to some global catastrophe resulting in ...
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What is the best site/tool/way for finding the RSZ values of a bitcoin transaction? [duplicate]

The two most popular sites for doing this are down which are https://2coin.org/ and https://2xoin.com/getRSZfromRawTX/ with no indication they'll ever return to be usable. Can anyone here link any ...
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How can I use RBF to replace a transaction sent from Bitcoin Core?

How do I resend a transaction with RBF on a Bitcoin Core node v.19 or v.20. I am running it on Ubuntu.
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2 answers
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Block 170 transaction validation in the old days

I'm trying to understand how to validate the first non-coinbase transaction, that is transaction 1 of block 169, as it was validated in the old days. This transaction has one input, which decoded ...
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2 votes
4 answers
104 views

How are funds verified?

I understand that transactions go into mempool and a miner "verifies" the transactions such as ensuring the user has the appropriate funds and correct signature. Specifically, how are ...
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Reference to Segwit raw transation format

Could anyone provide me a link to the specification of segwit raw transactions such as provided in https://developer.bitcoin.org/reference/transactions.html#raw-transaction-format ? (This url explains ...
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Coinbase to Blockchain Transaction

Hello everyone! Recently i received a cryptocurrency to my Blockchain Wallet. The Bitcoin was sent from Coinbase to my address - I waited for about an hour. And i don't see the transaction and the ...
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Interaction Between Market and Ledger Live (Knowledge of Transactions)

If someone purchases bitcoin on a market place (say gemini) and then transfers it to a hardware wallet (say ledger live), how does the ledger live app immediately show an updated "account balance&...
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Can I trace Bitcoin transactions using spent_transaction_hash?

I've spent some time analyzing Bitcoin transaction data and found out that the input column has this value called "spent_transaction_hash". In the dataset, the definition of this value is &...
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0 answers
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Decode Raw Bitcoin Hexadecimal Transaction

I have been using this excellent site one amongst many that offer to Decode Raw Bitcoin Hexadecimal Transaction....https://live.blockcypher.com/btc/decodetx/ Well, the site was down for a bit and that ...
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Is it possible to trace fund flows using previous transaction hash?

I've realized that there is a value called "previous transaction hash" which is stored in the "input" column of Bitcoin transaction data. I wonder if it is possible trace the ...
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0 answers
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What is Jailing tx HASH?

I participate in the testnet (I am a validator), and one of the tasks is to force myself to go to jail and write a timestamp, jailing block height and jailing tx HASH, but as far as I know there are ...
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2 votes
0 answers
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How to identify off-chain related transactions on the Bitcoin network [duplicate]

My understanding is that if someone wants to sell and buy Bitcoin via off-chain transaction, that person needs to set up a payment channel(funding transaction) first and it will recorded on the ...
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2 votes
2 answers
95 views

Information available to bitcoin miners in processing transactions

I'm very new to Bitcoin, and in my learning process I came across this site: https://mempool.observer/ which shows the varying amounts of unconfirmed transactions waiting to be mined. I'm learning ...
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Implementing a trustless English auction on Bitcoin

Is it possible to implement an English-auction type mechanic on Bitcoin (trustlessly)? I have tried smart contract implementations in other blockchains. For instance, one straight forward ...
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2 answers
120 views

Why blockchain new node verify all transactions in blocks?

Hello I'm the student studying blockchain and bitcoin. I have a question that why all node verify all transactions in blocks. I check if new node connect bitcoin network, then the all transactions in ...
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What's Bitcoin url or where can I find it

What is a Bitcoin transaction url? Is that the wallet or hash or what. I sent btc to address for game n it says confirmed but never came. Now the host is asking for transaction url but ?
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How does miner order transactions?

I understand that miners can do whatever they are pleased to do. Either include 0 transaction or 1000 transactions in the block before mining. But I assume majority of the nodes run the same set of ...
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0 votes
1 answer
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Internals of bitcoin block replication workflow from wallet, and conflict resolution

If I initiate a transaction from my wallet, does my transaction go to only one node? Does wallet client send to multiple nodes? What happens if no miner decides to include my transaction? Would my ...
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0 votes
1 answer
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When exactly does Bitcoin transaction batch happen?

I need some help understanding the Bitcoin internal... The basic idea is: The miner assembles N transactions into a block (rather than creating a consensus for every single transaction). And hash ...
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230 views

What is the correct way to extract all the private keys and transaction data from many wallet.dat files?

I have a ton of old backed up wallet.dat files. More than 150 ones. It's a big mess. I don't think that any of them have any coins sent to them, but there is a non-zero chance that one of them does ...
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2 answers
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How do I set up bitcoind to track all address balances?

Bitcoind only stores information about addresses that you've added. How do I make it store balance and transaction information for all addresses so that given any address I've never seen before, I can ...
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1 answer
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Why does the locking script for MultSig contain PubKeys instead of PubKeyHash?

I am reading "Mastering Bitcoin" by Andreas Antonopoulos. In the transactions section, the locking script for normal account(single address) is OP_DUP OP_HASH160 <Cafe Public Key Hash> ...
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1 answer
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How can transaction in my account be wrong value

Have a transaction on wallet BTC. received .002 BTC. VALUE $300 million dollars. I thought the exchange would help. I now see other transactions for small amounts of BTC but valued at 157 million ...
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0 votes
1 answer
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Why is signature S value is unnecessarily high not safe?

I get frequent warning when sending RawTX to PushTX message (Non-canonical signature: S value is unnecessarily high) Why is signature S with a large value dangerous (that is, when the first HEX ...
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55 views

Signing a transaction(Signature must be zero for failed CHECK(MULTI)SIG operation)

I try to sign raw transaction. Here is the instruction I used for it Redeeming a raw transaction step by step example required Python code I used to sign the transaction import hashlib import codecs ...
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0 votes
1 answer
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what is flow of a bitcoin transfer from one exchange to another?

Can someone please share what exactly is flow involved in transfer of a bitcoin from my account on one exchange to someone else's on another exchange? for example: is there a transfer from my account (...
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I invest 5000 PHp in bitcoin and to ask me i need to pay the transfer fee [duplicate]

List item I invest 5000Php in bitcoin but after the mining my invest he ask i need to pay a transfer fee .is it normal to pay that because im from Philippine
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1 vote
2 answers
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What if I change PubKeyHash in scriptPubKey of a transaction to my PubKeyHash?

Suppose a person A makes a transaction to person B and sends it to bitcoin network. Suppose I changed PubKeyHash in scriptPubKey of a transaction to my PubKeyHash and send it to bitcoin network. The ...
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0 votes
1 answer
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Is there any commands i put in the core that will suggest my account is from early days [duplicate]

Have you got anything i could put in the core that will point back towards or leave a clue to age of my account ,ie getdesendant/ansestors, mininginfo,or blockinfo, will any of these commands tell me ...
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0 votes
1 answer
34 views

why when making a command on bitcoin console does this appear staggered square brackets appear

Why when making a command of listunspent ,generate ,listlockunspent etc , Does this appear? [ ].
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0 votes
1 answer
136 views

Time needed for Bitcoin core synchronization

I had put on the process of synchronization on BITCOIN CORE and it has been around 2years since I had started the process and still its not completed, therefore now I would like to put some questions ...
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1 answer
187 views

How to generate p2pkh ScriptPubKey for coinbase transaction

One part of coinbase transaction is p2pkh ScriptPubKey (according to the book i read). Coinbase transaction here refers to the first transaction in a block , not Coinbase software/company. Suppose i ...
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-2 votes
1 answer
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Will Bitcoin-Qt link itself to my IP from 2009 and show coinbase rewards for mining? [duplicate]

Back in 2009 I remember putting Bitcoin-Qt on my computer. I went straight over to the site and downloaded, but never put any wallet name or passphrase. Now in 2021 I remembered what I had done. When ...
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0 votes
1 answer
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Detecting BTC transaction hash data: help

please I need some help in reading the hash data correctly. Given below transaction of total value btc 1.55821903 https://www.blockchain.com/btc/tx/...
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BTC invalid transaction: double spending attempt?

I'm writing because I need some help in understanding the below hash data. Thank you. https://www.blockchain.com/btc/tx/976e6d64a4c98cf15ac917b98a04333f896b7cd15c1f2fdfb18f6fee668b670c Is it a double ...
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1 vote
1 answer
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What are the Blockchain Transactions Status possible values?

Very noob at this. I'm seeing that a transaction in Bitcoin has a field called 'status': Example from blockchain: I was wondering, what are all the possible values that this field can get (or where ...
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1 vote
1 answer
51 views

What's the difference between an 'address' and an 'addressHash' in a transaction on a bitcoind node?

I'm listening to a ZMQ socket; it's sending out messages every time my node receives a transaction. The message is the binary value of the transaction itself. When I decode the binary (using a tool in ...
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0 votes
1 answer
55 views

How is transaction on exchanges that trade bitcoins connected to blockchain?

According to this answer, since the transaction on exchanges are internal, the transaction on blockchain is irrelated to them. But is the transaction on exchanges that trade bitcoins really not ...
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