Why do outputs need to be spent entirely?

Why do outputs need to be spent entirely?

I understand what change is and how it works (and it's analogous to physical money change), but what I don't understand is why this is needed in the first place.

Given that this is all computer based, I thought that money could be sent just by saying “I will give you 0.5 BTC” and verifying that your addresses in fact contain more than 0.5 BTC, and then substracting the spent amount.

So, my question is, why does the protocol define that outputs must be spent entirely? Where's the benefit of doing that instead of just sending the fraction that is needed?

https://ift.tt/2rb9Bry

Comments

Post a Comment

Popular posts from this blog

Bitcoin Core errors with database block

Bitcoin Core errors with database block I've had the follow issue: on one machine I've launced Bitcoin Core v0.16.0 and Litecoin Core v0.16.0. Each application work in separate datadir also each application have setted callback call for event walletnotify . For now I use both application with testnets. Recently, there have been frequent cases when these applications stop sending transactions, when restarting, an error occurs: "Corrupted block database detected. Do you whant to rebuild the block database now ?". It happens on both apps Bitcoin Core and Litecoin Core, after rebuild applications continue to work, but after a while it happens again Please help me, what I doing wrong? Thank you for any advice https://ift.tt/2z6j9rL
Read more

sendrawtransaction and txn-mempool-conflict

sendrawtransaction and txn-mempool-conflict When i sendrawtransaction to bitcoind, i get error (exceptions) 18: txn-mempool-conflict (use Bitcoin JSON-RPC denpamusic/php-bitcoinrpc ) But the transaction is sent to the network and is subsequently confirmed. Example one decoded transaction : https://jsfiddle.net/rn58a4j6/ then i send this transaction: 94ec12fc463230b4285a29b047608627c05572a4c6eabe6688a201ce49ae72f7 https://ift.tt/2MY2KP0
Read more