[taler-docs] branch master updated: coin state machine

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grothoff pushed a commit to branch master
in repository docs.

The following commit(s) were added to refs/heads/master by this push:
     new 5d9ac10  coin state machine
5d9ac10 is described below

commit 5d9ac101da6f747457522952533cf53e8bbf6ac1
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Sun Jul 12 11:31:52 2020 +0200

    coin state machine
---
 coin.dot | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/coin.dot b/coin.dot
new file mode 100644
index 0000000..a381223
--- /dev/null
+++ b/coin.dot
@@ -0,0 +1,45 @@
+digraph Coin {
+
+  planchet [color=blue, shape="box"];
+  fresh [color=blue, label="fresh coin", shape="box"];
+  rs [color=blue, label="refresh session", shape="box"];
+  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"];
+  expired [color=blue, label="expired coin", shape="doublecircle"];
+
+  subgraph {
+    rank = same; spent; expired;
+  }
+
+  subgraph {
+    withdraw; melt;
+  }
+
+  subgraph {
+    rank = same; melt; reveal; rs;
+  }
+
+
+  planchet->withdraw;
+  planchet->melt;
+  withdraw->fresh;
+  fresh->deposit;
+  fresh->melt;
+  deposit->partial;
+  deposit->spent;
+  melt->rs;
+  rs->reveal;
+  reveal->fresh;
+  melt->partial;
+  melt->spent;
+  partial->melt;
+  partial->deposit [color=red];
+  fresh->expired [style=dotted];
+  fresh->revoked [style=dotted];
+  revoked->recoup;
+  recoup->rs;
+  recoup->zombie;
+  zombie->melt;
+}

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