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[taler-exchange] branch master updated: add more detail to coin state ma
From: |
gnunet |
Subject: |
[taler-exchange] branch master updated: add more detail to coin state machine |
Date: |
Mon, 13 Jul 2020 19:03:52 +0200 |
This is an automated email from the git hooks/post-receive script.
grothoff pushed a commit to branch master
in repository exchange.
The following commit(s) were added to refs/heads/master by this push:
new b89e433f add more detail to coin state machine
b89e433f is described below
commit b89e433f4f48f5be8d35d7a7eaf45d5ac45169fd
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Mon Jul 13 19:03:05 2020 +0200
add more detail to coin state machine
---
doc/system/taler/coin.dot | 4 +++-
doc/system/taler/coin.pdf | Bin 17066 -> 17151 bytes
doc/system/taler/design.tex | 7 ++++---
3 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/doc/system/taler/coin.dot b/doc/system/taler/coin.dot
index ab1f8139..3112a1b6 100644
--- a/doc/system/taler/coin.dot
+++ b/doc/system/taler/coin.dot
@@ -6,7 +6,8 @@ digraph Coin {
partial [color=blue, label="dirty coin", shape="box"];
revoked [color=blue, label="revoked coin", shape="box"];
zombie [color=blue, label="zombie coin", shape="box"];
- spent [color=blue, label="spent coin", shape="doublecircle"];
+ spent [color=blue, label="spent coin", shape="box"];
+ wired [color=blue, label="wired coin", shape="doublecircle"];
expired [color=blue, label="expired coin", shape="doublecircle"];
subgraph {
@@ -36,6 +37,7 @@ digraph Coin {
melt->spent;
spent->refund;
refund->partial;
+ spent->wired [style=dotted];
partial->expired [style=dotted];
partial->melt;
partial->deposit [color=red];
diff --git a/doc/system/taler/coin.pdf b/doc/system/taler/coin.pdf
index a5590b75..dcd47292 100644
Binary files a/doc/system/taler/coin.pdf and b/doc/system/taler/coin.pdf differ
diff --git a/doc/system/taler/design.tex b/doc/system/taler/design.tex
index d78acac1..535dc51a 100644
--- a/doc/system/taler/design.tex
+++ b/doc/system/taler/design.tex
@@ -727,8 +727,9 @@ the {\em withdraw} protocol or the refresh protocol. The
most common scenario
is that the {\em fresh coin} is {\em deposited}. This payment creates a
deposit (see Figure~\ref{fig:deposit:states}) and either a {\em dirty coin}
(if the payment was for a fraction of the coin's value) or a {\em spent coin}.
-A spent coin can be {\em refunded} by the merchant (until the deposit is due),
-creating a {\em dirty coin}.
+A spent coin can be {\em refunded} by the merchant, creating a {\em dirty
+ coin}. Once the exchange has aggregated a coin and wired the amount to the
+merchant, a coin can no longer be refunded.
A {\em fresh coin} may also be subject to key {\em revocation}, at which point
the wallet ends up with a {\em revoked coin}. At this point, the wallet can
@@ -754,7 +755,7 @@ when the committment made for the {\em refresh session} is
checked during the
\begin{figure}
\begin{center}
- \includegraphics[scale=0.75]{taler/coin.pdf}
+ \includegraphics[scale=0.65]{taler/coin.pdf}
\end{center}
\caption{State machine of a coin.}
\label{fig:coin:states}
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