Quote from: jgarzik on September 25, 2012, 12:56:22 AM

Quote from: Serith on September 25, 2012, 12:44:42 AM

Quote from: Mike Hearn on September 22, 2012, 11:48:22 AM

They are done as part of the same transaction. P2P bonds are based on smart property, this page has detailed protocol descriptions that may make things clearer:

https://en.bitcoin.it/wiki/Smart_Property

But what if a person wants to exchange one car for another, and both of them represented by the same amount of bitcoins lets say 1 satoshi, creating single transaction would make it impossible to tell who owns what.

ECDSA keys provably demonstrate who owns what. It uses the same technology as the rest of bitcoin.

Maybe I am missing something.

Two people want to exchange cars, Alice owns Honda CRV and Bob owns Toyota RAV4.
Honda CRV represented by 1 satoshi at 1qwe...
Toyota RAV4 represented by 1 satoshi at 1rty...

Bob and Alice construct single transaction to exchange cars:
Inputs:
1 satoshi from 1qwe...
1 satoshi from 1rty...
Ouputs:
1 satoshi to 1asd... (address owned by Alice)
1 satoshi to 1fgh... (address owned by Bob)

Is it possible to know what car owned by Alice, or did I misunderstand the statement that exchanged items has to be a part of the same transaction?

Quote from: Mike Hearn on September 22, 2012, 11:48:22 AM

They are done as part of the same transaction.