<blockquote>
<p>Are each of the wallets mentioned on the left hand side here always from the same person (ie. perhaps change wallets)?</p>
<p>Or, is this transaction taking inputs from multiple (unrelated) people/wallets?</p>
</blockquote>
<p>It could be either. A single user's wallet might consume many UTXOs when crafting a transaction, but it is also possible for two (or more) people to supply inputs to a transaction, and they can do so without having to trust one another. So a transaction could have many potential participants, on the input side, and output side.</p>
<p>See:</p>
<ul>
<li>Common input ownership heuristic info: <a href="https://bitcoin.stackexchange.com/questions/49402/clustering-addresses-whats-the-most-effective-way/49408#49408">1,</a> <a href="https://bitcoin.stackexchange.com/questions/85974/batching-transactions-to-safe-on-fees/85975#85975">2.</a></li>
<li><a href="https://bitcoin.stackexchange.com/questions/16649/explain-how-coinjoin-enhances-anonymity-in-plain-english/19163#19163">Coinjoin</a></li>
<li><a href="https://bitcoin.stackexchange.com/questions/83070/expected-use-model-for-psbt">BIP 174 - partially signed bitcoin transactions</a> - <a href="https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki" rel="nofollow noreferrer">Full BIP 174 text</a></li>
<li>In depth info: <a href="https://en.bitcoin.it/wiki/Privacy" rel="nofollow noreferrer">Bitcoin Privacy Wiki</a></li>
</ul>

CC BY-SA 4.0
2019-07-08T11:38:28.477Z
2019-07-08T11:38:28.477Z
2020-06-16T11:10:03.350Z
chytrik
<p>I've trying to parse some data from the blockchain as provided by blockchain.info</p>

<p>My question is about transactions that have multiple inputs like this one:</p>

<p><a href="https://www.blockchain.com/btc/tx/0370881edfb32d3a7059bbbec6d923add2e016c41cdc9abafd1f1c52adf3ac9e" rel="nofollow noreferrer">https://www.blockchain.com/btc/tx/0370881edfb32d3a7059bbbec6d923add2e016c41cdc9abafd1f1c52adf3ac9e</a></p>

<p>What does is mean to have input from multiple wallet addresses?  </p>

<ul>
<li>Are each of the wallets mentioned on the left hand side here always from the same <em>person</em> (ie. perhaps <em>change</em> wallets)?</li>
<li>Or, is this transaction taking inputs from multiple (unrelated) people/wallets?</li>
</ul>

<transactions><transaction-input>
What does is mean to have input from multiple wallet addresses?
iampomo
# What does is mean to have input from multiple wallet addresses?

(Asked by: username_0 on 2019-07-08)

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/0370881edfb32d3a7059bbbec6d923add2e016c41cdc9abafd1f1c52adf3ac9e>

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

* Are each of the wallets mentioned on the left hand side here always from the same *person* (ie. perhaps *change* wallets)?
* Or, is this transaction taking inputs from multiple (unrelated) people/wallets?

**Tags:** transactions, transaction-input


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## 1 answers

### Answer by username_1 on 2019-07-08. Score: 3 | Accepted answer

> Are each of the wallets mentioned on the left hand side here always from the same person (ie. perhaps change wallets)?
>
> Or, is this transaction taking inputs from multiple (unrelated) people/wallets?

It could be either. A single user's wallet might consume many UTXOs when crafting a transaction, but it is also possible for two (or more) people to supply inputs to a transaction, and they can do so without having to trust one another. So a transaction could have many potential participants, on the input side, and output side.

See:

* Common input ownership heuristic info: [1,](https://bitcoin.stackexchange.com/questions/49402/clustering-addresses-whats-the-most-effective-way/49408#49408) [2.](https://bitcoin.stackexchange.com/questions/85974/batching-transactions-to-safe-on-fees/85975#85975)
* [Coinjoin](https://bitcoin.stackexchange.com/questions/16649/explain-how-coinjoin-enhances-anonymity-in-plain-english/19163#19163)
* [BIP 174 - partially signed bitcoin transactions](https://bitcoin.stackexchange.com/questions/83070/expected-use-model-for-psbt) - [Full BIP 174 text](https://github.com/bitcoin/bips/blob/master/bip-0174.mediawiki)
* In depth info: [Bitcoin Privacy Wiki](https://en.bitcoin.it/wiki/Privacy)


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