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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Bitcoin Core v.0.14. doesn't recognise recipient address starting bc1

I have some problem with sending Bitcoin from Bitcoin Core v.0.14. When entering the address in recipient field it becomes red. And I noticed that the address to which the translation needs to be made ...
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1 vote
3 answers
98 views

Do I have a chance to commit a transaction without any network fee?

I know how transaction fees are calculated. Also I understand that a transaction with a higher fee will be approved much faster than a transaction with the lowest one. Does the bitcoin protocol allow ...
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3 answers
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Does Proof Of Stake have any intrinsic scalability Advantage over Proof Of Work?

Is there any intrinsic scalability advantage to using proof of stake over proof of work? Ignoring the environmental impact issue, and ignoring sidechains, can proof of stake achieve higher TPS rates ...
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How to Back-up and Withdraw Bitcoins to My Mastercard

Please help me. I am new to bitcoin wallet and I would like to know how to back up my wallet and how to withdraw bitcoins to my mastercard or debit card.
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1 answer
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What size does a transaction have?

Transaction size should be the same right? I get that there were updates to the btc network that changes the size of transactions. But if you just look at transactions since the last updates, how big ...
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My bitcoin was approved but not spent [duplicate]

So i found out that my transaction was deemed suspicions for money laundering I guess. lol... of course it wasn't. I opened an account with bitcoin exchange and when i went to blockchain.com to send ...
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submit unconfirmed transaction use submitblock and collect fees [duplicate]

for make unconfirmed transaction at blockchain more faster confirmed, i myself using bitcoin core full node, how about if use submitblock command for make transaction quickly confirmed? also from ...
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2 votes
1 answer
128 views

How can I get the destination address from raw transaction data?

I am writing a program that reads Bitcoin transactions from .blk files and performs some analysis on them. I would like to get the transaction destination addresses (like in some transaction explorers:...
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2 votes
1 answer
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How can I generate expiring transactions?

I want to generate a transaction that spends funds to a wallet controlled by a third party, but for this transaction to only remain valid for a certain window of time. This could mean a transaction ...
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2 votes
2 answers
553 views

Incoming transaction has been marked as pending since 2013. How can I retrieve it?

I requested BTC from someone back in 2013. Its been in pending status ever since. It has nearly 500,000 confirmations. The value of transaction when initiated was only $200 or so. Now the value is ...
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Transaction signing and security: Different signing approaches

I am currently studying for an exam and reviewing a past one from the CS 251: Bitcoin and Crypto Currencies course in Stanford with the following question on transaction signing. I have written my ...
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1 answer
153 views

I sent my Bitcoin from Coinbase Wallet back to my coinbase wallet address. I basically sent it to myself but can't get access to it

I tried sending my Bitcoin from my coinbase wallet address to my cash app Bitcoin account but accidentally copied and pasted the Coinbase Wallet address instead of the cash app Bitcoin account. So ...
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4 votes
1 answer
183 views

What is SIGHASH_ANYPREVOUTANYSCRIPT?

BIP 118 describes SIGHASH_ANYPREVOUT, but also mentions SIGHASH_ANYPREVOUTANYSCRIPT. What is the difference, and why is the later sighash flag needed?
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Sending "generalized" secret messages over LN using "Lightning messages"

In the Mastering Lightning Network book section 3, it describes the Lightning Network as being "... so much more than the cryptographic protocols on top of the Bitcoin scripting language. It is a ...
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Help analyzing this color coded hexdump of the Bitcoin blockchain

Sample of genesis, growth, and current height Sample of the latter part and the end of blk02655.dat. This probably covers parts of the last 10000 blocks. Process here: https://twitter.com/...
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Send bitcoins directly from exchange to vendor

I want to buy something at a vendor that accepts btc only. Can I buy btc from a website like switchere (I'd use SEPA transfer for payment) and send it to the Vendor's wallet directly instead of my own?...
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1 vote
2 answers
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Why should a miner include transactions when creating a new block?

As I understand it, if I'm a miner, and I have 5 transactions in my queue, I then would use the previous blocks hash and my list of transactions to attempt to create a new block. To do this, I must ...
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6 votes
2 answers
1k views

What is this unusual transaction in the Bitcoin blockchain?

I found a transaction in the Bitcoin blockchain. The first output is unspent and has an abnormal Pkscript. What is this output and why does this output address have no transaction and balance on it? ...
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What are the ways to obtain public key of a wallet with no outputs

I was wondering if there is a way to obtain public key of a public address where the address does not have any output transaction
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1 answer
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Is bitcoin awarded per transaction or per block?

I'm still learning how Bitcoin works and one thing that remains unclear to me is when Bitcoin is awarded to a miner. From my understanding, a certain amount of Bitcoin is awarded to a miner when a new ...
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0 votes
1 answer
76 views

Which projects and services are responsible for most of the Bitcoin transactions?

Which projects and services are responsible for most of the Bitcoin transactions? Project Transactions % ABC 50 XYZ 20 I am interested to know which projects really contribute in paying more fees ...
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How safe it is to store keys in Electrum? I think Luke Dash JR didn't recommend it

I agree with Luke Dash Jr and in general this wiki with the fact that doing anything without a full node is a mistake: https://en.bitcoin.it/wiki/Clearing_Up_Misconceptions_About_Full_Nodes But my ...
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0 votes
1 answer
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How to use Bitcoin Core as a wallet without leaving no traces that used the wallet?

is it possible to open a wallet file, do transactions and anything you need, then backup the file inside a veracrypt container, move this file elsewhere outside of the drive running the full node and ...
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0 votes
1 answer
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How to use Bitcoin Core on a laptop as a hardware wallet [duplicate]

I would like to have the following setup: Bitcoin Core on an offline laptop. Here the private keys are stored. Full disk encryption. Bitcoin Core on an online laptop. Here watch-only addresses from ...
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9 votes
3 answers
2k views

What (if anything) in the bitcoin protocol prevents bias against certain accounts?

The bitcoin protocol allows miners to choose which transactions to include when they create a block. They can't include any inauthentic transactions, but to allow for an open market of transaction ...
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0 votes
0 answers
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TRACING A TRANSACTION [duplicate]

Thanks in advance for your answers. In 2017 I invested in bitcoin without any experience or knowledge of the processes involved. I have records of the transactions through Coinjar but don't know where ...
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1 vote
1 answer
71 views

Bitcoin transaction not confirmed since 3 days ago [duplicate]

Hello I might sound stupid but it’s been three days since I issued bitcoin transactions, all unconfirmed so far. I use Blockchain.com to manage my wallet and have done everything normally (I think, as ...
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3 votes
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What are the malleability threat vectors when passing PSBTs to other actors?

If I am passing a PSBT (Partially Signed Bitcoin Transaction) between multiple people, and I pass on my signature for my UTXOs for given inputs, can someone take advantage of malleability and cheat me ...
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1 answer
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Most transactions in a block

Block 689074 had 4,463 transactions. Is this the highest number of transactions in a block until now? What are the things that affect the number of transactions possible in a block? Few observations ...
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0 votes
1 answer
116 views

How to Interpret This transaction

I got lost in reading this transaction: a tx from blockchain.com This transaction does not have an input address, instead, it says "COINBASE (Newly Generated Coins)". Is it a block reward to ...
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0 votes
1 answer
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Calculating total sum of bitcoins sent by wallet

I'd like to calculate the total amount of bitcoin sent to anyone from a known wallet address. My initial idea was to page through everything returned by the listtransactions RPC, get the transaction ...
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0 votes
0 answers
30 views

Transaction not received? [duplicate]

Can someone help me? i did my first transaction From ID : 3FxvvRt1wpTHzN8xYVBXMsrGB6aTSrndBQ To ID: 3LSGTkzC62tgTALSGHF7Ztw1dPF5Vyg38B The adresses are right, not fault to find? Thanks
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1 answer
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Is this a transaction?

I found an old wallet.dat but i dont know what is this. Is it a transaction that is not signed? If yes please help. I dont have a clue about cryptography. I have read and seen some tutorials but i ...
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0 votes
2 answers
115 views

How do APIs know Bitcoin transaction and wallet types?

I am working on a university project, and I noticed that paid crypto APIs like Whale Alert or Whale Trace return information about transaction types (like exchange), sender and receiver wallets (like ...
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1 vote
2 answers
156 views

I sent bitcoins from one wallet to another. Next day, the receiving wallet shows balance 0

I have sent some bitcoins from bitcoin.com to the crypto app wallet, yesterday. But, the app still shows 0 bitcoin balance. I checked the receiving address on the block explorer and it showed that the ...
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1 vote
1 answer
353 views

What happens if nSequence is set to 0x00000000?

I know setting nSequence 0x00000001 means the transaction is not valid until 1 block has elapsed since its's prevout confirms. At most one spend per two blocks. What happens if it's set to 0x00000000? ...
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2 votes
2 answers
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How many BTC transactions happened in 2019?

I'm interested in a comparison between different blockchains and payment networks. Bitcoin has a block time of around 10 minutes, so there should be roughly 52,560 blocks in one year. However, the ...
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4 votes
1 answer
173 views

Where are transaction fees specified?

I've recently looked up the exact format of a transaction and came up with this (source with explanation): However, this seems not to include transaction fees. Are they not part of the transaction? ...
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0 votes
1 answer
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Understanding transaction input and ouput

The definition of bitcoin transaction input and output that is there on the web is: Input = address from which money was sent, Output = address to which money is received 1. But when I looked at one ...
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1 vote
1 answer
29 views

How does the mining network know/agree when a block has been defined and thus needs to be mined? (The hash determined.)

Based on my understanding, the blocks are made up a group of transactions. But somehow, the network needs to both agree on which transactions are part of the block and also (I would think) the order ...
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0 answers
43 views

transaction parts and identification

I'm making a reference document for bitcoin transactions using this transaction (its a random transaction). hash: it contains I would like to add detail to each of the addresses but I'm not sure ...
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50 views

transaction layout

I want to make a reference document that shows a full bitcoin transaction with brackets or lines to indicated each different part of the transaction. Then add a description of each part below the ...
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0 votes
0 answers
291 views

Need help with (Script failed an OP_EQUALVERIFY operation)

This is a repost of a question which i posted directly on the repository of bitcoinjs-lib, which you can see here I'm getting the following error when trying to push transactions: Err: ...
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0 votes
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73 views

How do I find out where my bitcoins got sent to? [duplicate]

I withdrew bitcoin from my account in Binance in 2018 and still have the email they sent with address it said it sent to,18bVuA2FxDdz5gE4qf9MgbsNxp2F46PaLD The time and amount looked correct. Now I ...
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3 votes
2 answers
991 views

Where and how are raw transactions stored on the blockchain?

My understanding is that transactions are stored on the blockchain in double hashed format: ie SHA256(SHA256(rawtransaction)). But it is also possible to get access to the raw transaction. This means ...
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1 answer
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Developing a Bitcoin POS (Payment Page) - How do I identify the transaction

This is probably a basic question but I can not find an answer. We are developing a BTC payment process for a Point-of-Sale. We have managed to build this fine and can make requests (QR code) for a ...
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0 votes
3 answers
93 views

Bitcoin in wallet transactions but not on the blockchain (old wallet)

I've been checking old wallets and found an unconfirmed transaction that's on the wallet but not on the blockchain transaction id (missing from blockchain) ...
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0 answers
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How can I be sure that anyone (i.e miner) will not change outputs from transaction? [duplicate]

I am wondering if ie. miner cannot change outputs from transaction. We have example of transaction: { "version": 1, "locktime": 0, "vin": [ { "txid": &...
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1 vote
1 answer
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what happens to low-fee or forgotten transactions

If a transaction has a fee that is too low then it is possible for the transaction to either age out of the mempool (14 days) or get removed because the mempool reaches its max size. So what happens ...
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1 vote
1 answer
95 views

What does bitcoin do that prevents someone from using your coins by just generating a key pair and saying "you" sent those coins?

I think I'm missing and understanding about the current process of how your wallet works and how the transactions are signed. For example, if I'm user "A" and there exists a transaction from ...
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