Questions tagged [transaction-input]

Questions about the mechanics of redeeming a UTXO in an input script.

Filter by
Sorted by
Tagged with
0
votes
0answers
22 views

Relation between transaction fees and inputs [duplicate]

So this might appear as a duplicate of some of the other questions on this stackexchange, but I feel most of the questions have failed to ask a question that I am really interested in. I want to ...
1
vote
1answer
174 views

Is sharing a signed input safe?

Is it possible to decode the private key from a signed input? For example: From this signed input hex... ...
2
votes
1answer
116 views

What are the sizes of single-sig and 2-of-3 multisig taproot inputs?

There was a Twitter discussion about the sizes of inputs and Taproot came up. What are the input sizes for Taproot inputs? Please cover both the key path spend (single-sig or default spend) and 2-of-...
0
votes
1answer
23 views

More Input-Values than necessary. How and why is this possible? No it is not the fees!

The TXID I am talking about: 21179a8560a0a0906f0c3396af338f74528130d46b65b7f0c79c378d343b3177 blockchain.com link: https://www.blockchain.com/btc/tx/...
0
votes
1answer
22 views

How to know where number of inputs field ends in a transaction if it is not a fixedsize field?

I know that we parse a transaction in bytes. So there are 2 quesions that I search for the answers of: 1- Can VarInt field -that gives the number of inputs in a transaction- be more than 2 hex digits(...
0
votes
1answer
25 views

How do I calculate the sum of transaction inputs?

I am attempting to calculate the mining fee of a transaction, given it's unsigned transaction hex by taking difference between the sum of the inputs and outputs. I also have access to an array of ...
0
votes
1answer
25 views

Is it possible to reference an input outpoint more than once in a transaction?

For example, could you have the following transaction: A --> B A --> C Where A is an input txid and index, and B and C are outputs? The reason I'm asking is because I believe with SIGHASH_SINGLE ...
5
votes
2answers
194 views

Can signature be re-used to cash out everything in the address?

I Know for the P2PK locking script it was like this [pubkey] <OP_CHECKSIG> and then an unlocking script is provided as simple as this: [sig] But if it works like this, others can simply grab ...
0
votes
1answer
36 views

Do transactions need to be signed

I always thought a transaction can be accepted when all its inputs are correctly provided with their unlock script (which usually contains a signature) ——yes transactions may also be rejected with ...
0
votes
1answer
34 views

Input of a transaction

If i want to send 0.2 bitcoin to Bob, will my transaction (in the input field) contain the list of all my previous transactions (both the ones in which i received bitcoins and the ones in which i sent ...
0
votes
1answer
559 views

Usage of PkScript as a part of Inputs of a Transaction

I've seen transactions with PkScripts as part of Inputs eg : Example of such a transaction Could anyone please explain how this PkScript is used ?
1
vote
1answer
216 views

How to create a bitcoin transaction without inputs

How can I create a transaction without inputs and it will be broadcasted but of course won't get confirmed? I would like the simplest method to do this
0
votes
2answers
39 views

Can addresses used in a single tx be assumed to be from the same wallet?

can addresses of input of a single tx be always considered as belonging to same account? Above is a sample transaction on bitcoin. Here, input addresses are 3P2hJg8iRSBExAjd9yQGaazCLPFLeGB3hU (0....
0
votes
2answers
617 views

How to get input address and amount from vin using bitcoin core rpc

I am trying to find details of every transaction using bitcoin core rpc. First, I using bitcoin-cli getblock to get the block data, then use bitcoin-cli getrawtransaction to get the transaction ...
1
vote
1answer
47 views

What does is mean to have input from multiple wallet addresses?

I've trying to parse some data from the blockchain as provided by blockchain.info My question is about transactions that have multiple inputs like this one: https://www.blockchain.com/btc/tx/...
0
votes
1answer
53 views

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 <...
0
votes
2answers
182 views

How to manually sign a transaction with multiple inputs and multiple outputs?

I'm developing transaction constructor, but i faced several problems. To some of which i found answer in How to sign a transaction with multiple inputs?, for the rest i'll try to explain: When we ...
1
vote
2answers
114 views

What’s the purpose of checking for input overflow?

Everyone knows this famous fix for block 74638 which still exists in other files. But there’s something I can’t understand, why check for inputs overflow since it’s not possible to have enough utxo ...
4
votes
1answer
346 views

Maximum number of inputs per transaction

In theory, what is the maximum number of inputs per transaction? Is it defined primarily by the maximum number we can store on the 9 byte varint? How big of a number can be stored on 9 bytes? Would ...
4
votes
1answer
194 views

Are all UTXOs locked by an address spent in a transaction?

Imagine I have 2 UTXOs locked by my address, each of which allows me to spend 5 bitcoins. If I subsequently want to send just 2 bitcoins to someone else, will both UTXOs be used as inputs in the ...
5
votes
2answers
777 views

How do virtual size, stripped size and raw size compare between legacy address formats and native segwit?

This answer states that SegWit doesn't reduce transaction size. If this is true, why is it cheaper to send a SegWit transaction?
0
votes
2answers
44 views

Reference an UTXO of a transaction that has not been yet mined

How to reference an UTXO that has not been yet mined? I want to prepare a transaction and, before spreading it, use its UTXO as input for another relative timelocked transaction. Then, spread the ...
1
vote
1answer
425 views

bitcoinj java library not decoding input addresses for some transactions

I'm trying to "extract" sender's addresses from OP_RETURN Bitcoin transactions, but my code is not working properly. getWalletAddressOfSender(final Transaction tx) public static Address ...
-1
votes
1answer
71 views

How do these inputs/outputs make sense for this transaction?

Using coinbase, I transferred $1 in BCH to my friends BCH address. Now I am studying the transaction on a blockchain explorer as a learning exercise. See here: https://blockchair.com/bitcoin-cash/...
1
vote
1answer
352 views

Why are the inputs of Bitcoin transactions signed?

This is my understanding of what a transaction looks like: inputs: input0: txid: <funding tx0 TXID> outputID: <output ID of UTXO in the funding tx0> scriptSig: <...
1
vote
0answers
34 views

What to pass in Transaction Input using Bitcoinj library

URGENT - Need help with setting up Transaction Input and Output objects Transaction rawTransaction = new Transaction(params); txnAmount = Coin.valueOf(50000000); rawTransaction.addOutput(txnAmount, ...
1
vote
2answers
70 views

How many weight units does an input use?

What is the weight unit cost of an input? And can you batch/aggregate the inputs or is it linearly growth when you add more inputs to a tx?
0
votes
1answer
55 views

Which values are GetValueIn() and GetValueOut() calculate?

In Transaction.cpp, there is a function CAmount CTransaction::GetValueOut() const. In Coins.cpp, there is a function CAmount CCoinsViewCache::GetValueIn(const CTransaction& tx) const. My ...
2
votes
1answer
307 views

what does it mean when a transaction contain multiple inputs?

Just like https://www.blockchain.com/btc/tx/230636ab4f285ca5e9f4c32dbae581c10d491a99493d8733c594af780f1edc5e what does it mean when a transaction contain multiple inputs? as i know, an transaction ...
2
votes
1answer
86 views

How does fee split between senders in a transaction?

I know how fee is calculated in a transaction, but I don't know how this fee amount split into senders. For example, consider the following transaction with 0 BTC miner fee: inputs: Alice ...
0
votes
1answer
161 views

Sign Bitcoin transaction with several inputs using bitcoinj. Broadcasting of transaction failed

Good day! I'm working with low level API to make tx and sign it offline. But after all preparations I try to broadcast it and than i get an error from network: 16: mandatory-script-verify-flag-...
2
votes
2answers
219 views

If I reuse the same address can a previously used transaction be reused?

I was wondering, if I used an address adr0 to spend some coins in a transaction tx0 that give the coins to a different address adr1, and eventually, after some time, I receive some (completely ...
0
votes
1answer
110 views

How get outpoint from txIn

I'm from Ukraine and do not know much English, sorry. I'm not understand where in transaction keep outpoint. Please give me example or manual how get outpoint from input.
0
votes
2answers
576 views

How get address from ScriptSig: PUSHDATA(N)?

I'm from Ukraine and do not know much English, sorry. I want to parse blockchain, but I have problems. In block 728 will first txs (user-user). But input-script have not public keys. I read this ...
1
vote
1answer
78 views

How to read a transaction from a block? Who paid whom?

I'd like to know how to read a 'transaction', so if we take an example of this transaction (which comes from block #520156) it's easy to spot that 'th' paid 'U8' 0.005BTC and '9E' paid 'Y5' 0.013BTC. ...
4
votes
1answer
6k views

multiple input and output addresses in bitcoin transactions

I was checking transactions in blockchain.info. I have some questions about transaction information about input and output addresses. block address: https://blockchain.info/address/...
1
vote
2answers
66 views

how to use multiple time specific address in input scripts with difference balances?

look at to the following transaction (withdraw transaction from binance) https://blockchain.info/tx/404fd22d3d88d129975d03fe2993f0126db8f066b3d8126d6cca676747439515?show_adv=true How in input scripts ...
0
votes
1answer
45 views

Could someone explain how the TX operation here works?

I know this is a BCH address, but it's the best example I could find. The same concept holds for BTC, so understanding what's going on is relevant. https://explorer.bitcoin.com/bch/tx/...
1
vote
1answer
66 views

How are 'excessive' numbers of inputs and outputs handled in bitcoin transactions?

I wrote a bitcoin transaction parser in python and it flips out when transactions have more than 255 inputs or outputs. Some transactions have their number of inputs/outputs represented by a 1 byte ...
0
votes
1answer
296 views

Unable to decode input address

It seems that some transactions, although having "prev_out" field in their "inputs", does not have "addr" in the "prev_out", i.e. they do not have input address. What is this kind of transactions for? ...
0
votes
1answer
1k views

what happens to UTXOs when a transaction output script is satisfied?

As per my understanding from the book "Mastering bitcoin", a transaction output contains three things Amount - Bitcoin Value in Satoshis Locking-Script-Size - Locking-Script length in bytes, to ...
0
votes
1answer
136 views

Is there a way to get all addresses from an Wallet?

If I was to search the blockchain for address X, then I see that it has two inputs in a transaction, X and Y. I can safely assume that X and Y are owned by the same person? Now if I look at all of ...
1
vote
1answer
142 views

Does input and output size vary by address type?

For instance, we have two outputs, output X sends to a P2SH address, and output Z sends to a P2PKH address. Would output X have a different transaction size than output Z? What about the size of the ...
3
votes
2answers
211 views

Why do we refer to previous transactions in each transaction?

Isn't it enough to just have the Input Address, Output Address, Amount and Signature for each transaction?
1
vote
1answer
400 views

How to calculate scriptPubkey?

Given an address (i.e. 1BnPVV5Tt25cxbDg6DqoxJunjSL8reCGz6), how can I calculate its scriptPubKey in order to build a transaction?
1
vote
2answers
547 views

Can you specify more than one output index in a transaction's input?

It looks to me like each input to a bitcoin transaction has an index that specifies only one output from the input its spending. Is there a way to specify more than one output index, or do you have to ...
0
votes
2answers
106 views

Does using different addresses affect subsequent transaction size, given the same number of inputs?

I'm quite confused about the input count that affect the transaction size, example: x1 = my receive btc address x2 = my another receive btc address x3 = my another receive btc address Scenario A ...
2
votes
1answer
485 views

Can a low fee unconfirmed transaction prevent confirmations of following transactions?

To be more precise, consider the following situation: Address A gets an input of 4 BTC. You try to make a transaction from A to B with 1 BTC and a very low fee, which means its unconfirmed for a long ...
1
vote
2answers
416 views

Do i need to sign each input in a raw transaction?

I've been reading up about raw transactions on bitcoin.org and there are two examples Simple and Complex. What I can't tell from the information provided is if it necessary to sign each of the inputs ...
0
votes
2answers
967 views

Sign transaction with multiple inputs using bitcoinj/peercoinj libraries

Good day for everyone! I have some troubles with adding signed Input to the transaction. Currently, I'm working with altCoin (fork peercoin) currency. I'm trying build the transaction in the ...