Questions tagged [output]
The output tag has no usage guidance.
107
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2
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61
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When the validity of scriptPubKey is checked?
I have a couple of questions related to validation of script in transaction output (scriptPubKey).
I apologize for a little more text, but I tried to explain in detail what I don't understand.
Since ...
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5
votes
4
answers
789
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Why is little endian used in transaction formatting and other parts of bitcoin?
I've noticed just from studying the raw hex values of transactions that many components are formatted in hexidecimal little endian.
For example, the amount specified in an output will be formatted as ...
- 105
0
votes
1
answer
53
views
Transaction fees for multiple outputs
I received a transaction from an exchange. It has 30 outputs, the fee was - according to blockchain.com - roughly 18k sats. Is this the fee per output or for the entire transaction? Is it cheaper - ...
0
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3
answers
86
views
Can someone break down what is returned by pybtc?
I am feeding network data to pybtc.Transactions. What I do is I take tx messages (which I understand to only contain a single transaction) and I feed them into pybtc.Transaction but only after ...
- 127
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1
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121
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parse bitcoin addresses from transactions received through the P2P protocol using python
I'm trying to extract public keys and transaction amounts from tx commands using python. Everyone on this stack exchange has been extremely helpful, but I think it's time to try and leverage a library ...
- 127
2
votes
1
answer
103
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How come an `OP_3` P2SH redeem script is spendable?
I completed a round trip transaction with the redeem script hash: 31vFvEkyAb2iusbPip36H9rVt6pxExuaVR, whose redeem script is OP_3 (0x53) (yes I know not secure).
I can understand OP_1 redeem script ...
- 115
3
votes
1
answer
158
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Understanding transaction with hundreds of input/output
I've been trying to follow a transaction with hundreds of inputs from different addresses and hundreds of outputs.
This is the transaction I'm looking into:
https://www.blockchain.com/explorer/...
- 163
2
votes
3
answers
183
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Multi input transaction heuristic
I was revising for my upcoming exam and came across this slide, which I don't completely understand as I find it a bit confusing. Can someone please explain what the lecturer was trying to point out?
...
- 23
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2
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79
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Explain like I am 5...how can one transaction hash have so many outputs?
I have tx hash 5b03738ed2cc9c80e6a4dded10794ab28efca2671039764217d53c54f64a3f39 and it contains 11 outputs. I understand how UTXO works, but where I feel confused is how does the sending address know ...
0
votes
1
answer
71
views
Can a coinbase adhering to BIP-0034 (block v2) only pay P2PKH addresses?
I've been working on a bitcoin miner that uses BIP-0034 (block v2).
I'm confused about the coinbase transaction of block v2. Does block v2 only accept P2PKH type of address to allow me to receive a ...
8
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1
answer
656
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Why are transaction input and output indices called `vin` and `vout`?
What does the v in vin and vout stand for? And is it an instance of a more general naming scheme?
- 524
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1
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96
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NBitcoin in C# MVC App Gives Me A WitnessProgramMissmatch Error When I Try to Build The Transaction
I am writing tests for an app I built that uses NBitcoin to send bitcoin and make bitcoin transactions.
I have the following code to create fake bitcoins for an integration test:
private ICoin[] ...
- 243
1
vote
0
answers
37
views
Hash outputs in Taproot transactions
I'm using the test vector from Bip341 to generate the Hash outputs in the test transaction. My procedure is as follows:
Serialise amount as 8-byte little endian
Serialise scriptpubkey including ...
- 141
0
votes
1
answer
68
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Does testnet block 855996c9444827112b68c0606d8dfec62385d1b3448e412bc1c721633a641669 discard the block reward?
I am poking around in the testnet blockchain, and I saw a block mined recently where the outputs added up to just 0.04953672 BTC. Since there is no output for the 50BTC block reward, does that mean ...
- 147
4
votes
2
answers
1k
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Why are segwit transactions cheaper than legacy transactions?
What's the reason to make fees for segwit addresses lower, while keeping legacy addresses with higher fees? --
I'm interested in both, why segwit transactions are cheaper than legacy addresses, and ...
user125245
2
votes
1
answer
474
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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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1
vote
1
answer
29
views
How is the input and output fields serialised in a transaction?
I'm trying to write a parsing function to find the input and output fields in a serialised transaction.
My problem is that I can find the number of inputs and outputs using the varint byte(s), but not ...
- 141
6
votes
2
answers
2k
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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?
...
- 163
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0
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31
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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":
&...
- 1
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1
answer
55
views
output descriptor serialization
I'm looking at the following official test vector:
wsh(multi(1,xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB/1/0/*,...
- 3
7
votes
1
answer
400
views
Will cross-input signature aggregation need a new output type?
If cross-input signature aggregation were to get implemented in a subsequent soft fork after Taproot's activation, would its use require a new output type?
- 71.6k
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70
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Sent BTC to Old Output Address
I sent BTC to an old Output address from a previous transaction and now I do not know where it has gone. Does anyone know how to fix this?
3
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1
answer
64
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Can you have a transaction without a change output?
While reading about the fees here https://metamug.com/article/security/bitcoin-transaction-fee-satoshi-per-byte.html
The article said that "In the simplest case, you'll have one input and two ...
- 147
2
votes
1
answer
164
views
Retrieve all Unspend Output given a priv key
Is it possible to retrieve all Unspend Output transaction given the private key?
I have noticed that different wallet give me different balance for the same Private Key. For instance, Atom and BitPay ...
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1
vote
1
answer
114
views
Why does the value range of outputs need to be restricted?
In the 'tx messages' section for protocol rules we have
Each output value, as well as the total, must be in legal money range
For each input, if the referenced output does not exist (e.g. never ...
- 340
1
vote
1
answer
92
views
How does a miner verify a transaction which is spending an output of another transaction in the same block?
It is mentioned in this post that:
If all validation of all transactions in a block succeeds, the consumed inputs are removed from the database, and all outputs of those transactions added as fresh ...
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-1
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1
answer
131
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Please help out I send 109k to my client he was able to receive $50,000 please help
I send a bitcoin transaction of all coin my wallet which is $109,180 to my client wallet address giving to me. But he received $50,000 in is wallet address. And I sent all the coin my of 109180. ...
- 1
2
votes
2
answers
2k
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What exactly is the "vout" field?
This is driving me nuts. Through trial-and-error, asking numerous people and attempting to read endless articles and manuals, I've come to the conclusion that the "transactions" listed by ...
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votes
1
answer
565
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What does the index of an UTXO stand for?
For example, here is the output of an API I hit with one of my testnet UTXOs. What is the meaning of the index field in this context ?
"utxo":[
{
"block_id":1899516,
...
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1
vote
1
answer
138
views
Transaction Output Order
Suppose I generate a transaction with 5 outputs.
Is there a deterministic way to know how the outputs will be ordered on chain (their .n values) or will they simply appear in the order in which I ...
- 731
2
votes
1
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266
views
Refer to UTXO by output index or output full address in blockchain?
I'm writing my own simple crypto and wondering whether input in a transaction should refer to unspend output only by it's TXID and vout (index in outputs vector in a transaction) OR by it's TXID and ...
- 21
1
vote
1
answer
104
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How to identify the sender from crypto payments
I want my users to deposit crypto into the website for credits, but the biggest issue is getting the input address (the user's address). How can I identify the sender from the transaction (since there ...
- 21
2
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1
answer
173
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Transaction parsing - Satoshi value
how exactly is the satoshi value in a raw transaction calculated to decimal? Because on blockchain.info, I cannot figure out how they parse the raw transaction from that value to the JSON result. I ...
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2
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1k
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Why does vout sometimes not have address?
I am trying to parse all transactions.
I found that some transactions do not have addresses in their vout.
There are two situations that vout does not have addresses.
The first one is the miner reward....
- 173
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2
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57
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Check txout against the circulating supply instread of MAX_MONEY
https://github.com/bitcoin/bitcoin/blob/aaaaad6ac95b402fe18d019d67897ced6b316ee0/src/consensus/tx_check.cpp#L27
If txout.nValue is more than the circulating supply and less than MAX_MONEY, ...
- 159
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votes
2
answers
156
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Why is 'script' used in a transaction instead of the output address?
I see transactions contain script for each output, but this "script" seems to be deterministically derived from the address associated with the output.
Why does the bitcoin protocol opt for the use ...
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4
votes
2
answers
412
views
Is it possible to write a transaction of bitcoins, having only pen, paper and a private key from the address with some unspent outputs?
In my last answer I have done an allegation which I want to be proven or disproven. If this work possible, how much paper does it require? What kind of software needs Bob to send a transaction to ...
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0
answers
121
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Address final balance is 0 after receiving 0.003 BTC
I generated a new BTC address (address A). I tried to send 0.003 BTC to address A. After sending them from my coinnomi wallet, the balance of address A remains 0 and from output seems that 0.003 BTC ...
3
votes
1
answer
166
views
Can a coinbase transaction have a segwit output?
And more generally speaking, are there any restrictions on the output of a coinbase transaction?
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1
answer
270
views
Why is a 20 byte hash acceptable in p2wpkh but p2wsh needs 32 bytes?
Why is it acceptable to use a 20 byte hash to represent single-sig witness programs whereas a 32 byte hash is used for pay to witness script hash?
- 71.6k
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2
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196
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Why same output address is invalid in a transaction on Bitcoin Core?
I'm studying Bitcoin Core currently. I found incomprehensible code, that shows making a transaction is rejected if there are same output addresses in a transaction.
See Fig1, Fig2
Origin source code ...
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0
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39
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How does a Drivechain output work?
It is said that Drivechain works by sending a transaction output to a miner/hashrate-controlled escrow. I know it works by allowing miners to vote over a large number of blocks on transactions, that ...
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0
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58
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How many TXO have been created in total?
I've seen some statistical data about the Bitcoin UTXO number (around 61M currently). I was wondering how many TXOs (including spent and unspent) there were in the complete history of Bitcoin?
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1
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134
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OP_EQUAL not working properly
I went to https://siminchen.github.io/bitcoinIDE/build/editor.html to try some bitcoin scripting and I wrote this script:
<1PUzZ61FSVTn12CafJC85Vy1ts3BoFcXdU> OP_HASH160 <...
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2
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52
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Where are the non-scriptPubKey outputs in the chainstate leveldb?
I read
https://bitcoindev.network/understanding-the-data/
and it explain that the leveldb of the chainstate contain transaction with at least one unspent output.
And it has "The scriptPubKey and ...
0
votes
1
answer
88
views
How can I find the transaction that spends a specific output via an API?
I am wondering how I can find the transaction that spends a specific output (for a large number of transactions). So for example, I have a transaction like the following: https://www.blockchain.com/...
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2
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221
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Why is the value field 8 bytes in transaction output when it can be achieved with 7 bytes?
Bitcoin uses a 8 bytes value field in the transaction output. However, the total supply of bitcoin is capped at 21M. Theoretically, even if all the 21M bitcoins are transferred to a single address, ...
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96
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What does "Nonstandard output" mean on Tradeblock transaction page?
I tried to send bitcoin but the recipient hasn't received it.
The trade block page shows "Nonstandard output" under outputs as shown in the link below:
Tradeblock page for transaction
I used an ...
- 125
1
vote
1
answer
62
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Two question about bitcoin transaction signing
I know that the signing should use public key, what if the private key is used in signing the output? Does that mean anybody can use the money in your wallet? And is there any difference between P2PKH ...
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181
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Newly generated coins
New to BTC world so my question is how and what can I do with newly generated coins what's the process and how to see balance of that in wallet? Can I send those to paper wallet
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