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Clarify the consensus rule preventing double-spends. 

Signed-off-by: Daira Hopwood <daira@jacaranda.org>
This commit is contained in:
Daira Hopwood 2017-03-04 23:25:28 +00:00
parent b34edb5e40
commit 5fe9d6d525
1 changed files with 15 additions and 3 deletions
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18
protocol/protocol.tex
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@ -280,6 +280,7 @@ electronic commerce and payment, financial privacy, proof of work, zero knowledg
\newcommand{\treestates}{\term{treestates}}
\newcommand{\nullifier}{\term{nullifier}}
\newcommand{\nullifiers}{\term{nullifiers}}
\newcommand{\xNullifiers}{\term{Nullifiers}}
\newcommand{\Nullifier}{\titleterm{Nullifier}}
\newcommand{\Nullifiers}{\titleterm{Nullifiers}}
\newcommand{\nullifierSet}{\term{nullifier set}}
@ -1268,9 +1269,13 @@ Each \fullnode maintains a \nullifierSet logically associated with each \treesta
As valid \transactions containing \joinSplitTransfers are processed, the \nullifiers
revealed in \joinSplitDescriptions are inserted into this \nullifierSet.
If a \joinSplitDescription reveals a \nullifier that already exists in the
\blockchain at the associated \treestate, the containing \transaction will be
rejected, since it would otherwise result in a double-spend.
\xNullifiers are enforced to be unique within a valid \blockchain, in order to
prevent double-spends.
\consensusrule{
A \nullifier{} \MUSTNOT repeat either within a \transaction, or across
\transactions in a valid \blockchain.
}
\nsubsection{Block Subsidy and Founders' Reward} \label{subsidyconcepts}
@ -4118,6 +4123,13 @@ The errors in the proof of Ledger Indistinguishability mentioned in
\introlist
\nsection{Change history}
\subparagraph{2017.0-beta-2.5}
\begin{itemize}
\item Clarify the consensus rule preventing double-spends.
\end{itemize}
\introlist
\subparagraph{2017.0-beta-2.4}
\begin{itemize}