<p>A single transaction may contain multiple inputs and outputs. It is not the transaction that is signed by the sender, but each input. The signature is in the <code>scriptSig</code> field of each input.</p>

<p>See <a href="http://en.bitcoin.it/wiki/transaction" rel="nofollow noreferrer">http://en.bitcoin.it/wiki/transaction</a></p>

CC BY-SA 4.0
2018-09-20T01:20:10.350Z
2018-09-20T01:25:53.983Z
2018-09-20T01:25:53.983Z
JBaczuk
<p>Just like <a href="https://www.blockchain.com/btc/tx/230636ab4f285ca5e9f4c32dbae581c10d491a99493d8733c594af780f1edc5e" rel="nofollow noreferrer">https://www.blockchain.com/btc/tx/230636ab4f285ca5e9f4c32dbae581c10d491a99493d8733c594af780f1edc5e</a></p>

<p>what does it mean when a transaction contain multiple inputs?
as i know, an transaction should be signed by the sender`s the private key.
However there are a lot of sender in one transaction, how does it happen? 
thanks</p>

CC BY-SA 4.0
2018-09-20T01:30:49.797Z
It is just like in the real world, you combine multiple bills and coins to pay for an item. Two bills of 1 USD to form a payment of 2 USD.
Penquin
CC BY-SA 4.0
2018-09-21T23:55:26.543Z
...and in the real world, your ownership is proven by possession of each the bills. In bitcoin, this is proven by each of the signatures.
hedgedandlevered
<transactions><transaction-input>
what does it mean when a transaction contain multiple inputs?
wilson Liu
# what does it mean when a transaction contain multiple inputs?

(Asked by: username_0 on 2018-09-20)

Just like <https://www.blockchain.com/btc/tx/230636ab4f285ca5e9f4c32dbae581c10d491a99493d8733c594af780f1edc5e>

what does it mean when a transaction contain multiple inputs?
as i know, an transaction should be signed by the sender`s the private key.
However there are a lot of sender in one transaction, how does it happen?
thanks

**Tags:** transactions, transaction-input

> **Comments:**
> **username_1**: It is just like in the real world, you combine multiple bills and coins to pay for an item. Two bills of 1 USD to form a payment of 2 USD.  
> **username_2**: ...and in the real world, your ownership is proven by possession of each the bills. In bitcoin, this is proven by each of the signatures.  

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## 1 answers

### Answer by username_3 on 2018-09-20. Score: 2

A single transaction may contain multiple inputs and outputs. It is not the transaction that is signed by the sender, but each input. The signature is in the `scriptSig` field of each input.

See <http://en.bitcoin.it/wiki/transaction>


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