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Add comments about changes in coin validity due to blockchain evolution. 

Signed-off-by: Daira Hopwood <daira@jacaranda.org>
This commit is contained in:
Daira Hopwood 2016-02-25 17:10:26 +00:00
parent a8468efb58
commit 0db3ecc2ad
1 changed files with 11 additions and 0 deletions
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11
protocol/protocol.tex
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@ -74,6 +74,7 @@
\newcommand{\script}{\term{script}}
\newcommand{\serialNumber}{\term{serial number}}
\newcommand{\serialNumbers}{\term{serial numbers}}
\newcommand{\spentSerials}{\term{spent serial number set}}
% Daira: This doesn't adequately distinguish between zk stuff and transparent stuff
\newcommand{\paymentAddress}{\term{payment address}}
\newcommand{\paymentAddresses}{\term{payment addresses}}
@ -511,6 +512,16 @@ will attempt to decrypt that ciphertext component as follows:
}
\end{itemize}
To test whether a \coin is unspent in a particular \blockchainview also requires
the \authKeypair private key $\AuthPrivate$; the coin is unspent if and only if
$\sn = \PRFsn{\AuthPrivate}(\CoinAddressRand)$ is not in the \spentSerials
for that \blockchainview.
Note that a coin may change from being unspent to spent on a given \blockchainview,
as transactions are added to that view. Also, blockchain reorganisations may cause
the transaction in which a coin was output to no longer be on the consensus
blockchain.
\changed{
Similarly, let $\DiscloseKey$ be a \viewingKey holder's \discloseKey.
Then for each \PourDescription in its \blockchainview, the \viewingKey holder