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Unspent Transaction Output (UTXO)

Unspent Transaction Output (UTXO)

Unspent Transaction Outputs (UTXOs) are sums of a cryptocurrency sent from one address to another but not yet redeemed by the reciever in order to send the funds to somebody else in a subsequent transaction.

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Edits on 26 Dec 2018
Daniel Frumkin"Added image (created myself), wrote description and article, added category and related topics"
Daniel Frumkin edited on 26 Dec 2018 4:24 pm
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Unspent Transaction Output (UTXO)

Unspent Transaction Outputs (UTXOs) are sums of a cryptocurrency sent from one address to another but not yet redeemed by the reciever in order to send the funds to somebody else in a subsequent transaction.

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Unspent Transaction Output (UTXO) is a phrase used with cryptocurrencies to describe a balance of a given digital currency that has been sent from one wallet address to another but has not yet been transferred from the receiver to somebody else. 



For example, if Alice sends 1 Bitcoin to Bob, Bob is then in possession of a UTXO for as long as he hasn't spent the BTC he received from Alice. As soon as Bob spends the 1 BTC, the lifespan of the UTXO ends.



The purpose of classifying UTXOs as such is to enable transaction validators in a cryptocurrency network to easily distinguish valid transactions from invalid transactions.

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Supposing that Bob's wallet has only ever been involved in one transaction in which Bob receives 1 BTC from Alice, transaction validators know that Bob's UTXO balance is 1 BTC. If Bob sends that 1 BTC to Carol, his UTXO immediately becomes 0 BTC. If Bob then tries to double-spend his coins in a second outgoing transaction, validators will see that his UTXO balance is insufficient to be used as an input in the second transaction and the honest validators will not propagate or confirm his double-spend transaction.

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Golden AI"Merging standard tables"
Golden AI edited on 31 May 2018 11:55 pm
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Jude Gomila"Initial topic creation"
Jude Gomila created this topic on 8 Sep 2017 1:47 am
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 Unspent Transaction Output (UTXO)

Unspent Transaction Outputs (UTXOs) are sums of a cryptocurrency sent from one address to another but not yet redeemed by the reciever in order to send the funds to somebody else in a subsequent transaction.

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