Share

WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
  (Redirected from Unspent outputs of transactions)
Jump to navigation Jump to search

In cryptocurrencies, an unspent transaction output (UTXO) is an output of a blockchain transaction that has not been spent, i.e. used as an input in a new transaction. Bitcoin is the most famous example of a cryptocurrency that uses the UTXO model.[1][2][3]

Outputs are a superset of UTXOs.[1] Accordingly, UTXOs are a subset of the outputs superset. Bitcoin UTXO lifespans have been studied.[4]

In the case of a valid blockchain transaction, unspent outputs (and only unspent outputs) may be used to effect further transactions. The requirement that only unspent outputs may be used in further transactions is necessary to prevent double spending and fraud.

For this reason, inputs on a blockchain are deleted when a transaction occurs, whilst at the same time, outputs are created in the form of UTXOs. These unspent transaction outputs may be used (by the holders of private keys; for example, persons with cryptocurrency wallets) for the purpose of future transactions.

See also[edit]

References[edit]

  1. ^ a b "Unspent Transaction Output, UTXO - Bitcoin Glossary". bitcoin.org.[unreliable source?]
  2. ^ "What is Unspent Transaction Output? Get the definition here".[unreliable source?]
  3. ^ "What Is An "unspent Output"? Bitcoin Unspent Output Transaction 2018". bitcoinsnews.org.
  4. ^ "Bitcoin UTXO Lifespan Prediction" (PDF). cs229.stanford.edu. December 11, 2015.

Further reading[edit]


Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.

Powered by YouTube
Wikipedia content is licensed under the GFDL and (CC) license