[Webfunds-commits] html/guide params_classes.png payment_classes.png token_classes.png Makefile token.html token_money.sda token_classes.jpg

Mon, 2 Apr 2001 00:24:02 -0400 (AST)

iang        01/04/02 00:24:02

  Modified:    guide    Makefile token.html token_money.sda
  Added:       guide    params_classes.png payment_classes.png
                        token_classes.png
  Removed:     guide    token_classes.jpg
  Log:
  updated status of token project

Revision  Changes    Path
1.9       +3 -1      html/guide/Makefile

Index: Makefile
===================================================================
RCS file: /home/webfunds/cvsroot/html/guide/Makefile,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -r1.8 -r1.9

--- Makefile	2000/12/05 20:50:09	1.8
+++ Makefile	2001/04/02 04:24:00	1.9
@@ -7,7 +7,9 @@
 	cvs.a \
 	design.a \
 	token.a \
-	token_classes.a \
+	payment_classes.o \
+	token_classes.o \
+	params_classes.o \
 	joincvs.a \
 	wfwin32.a \
 	access.a \



1.4       +116 -25   html/guide/token.html

Index: token.html
===================================================================
RCS file: /home/webfunds/cvsroot/html/guide/token.html,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -r1.3 -r1.4
--- token.html	2000/12/05 20:50:10	1.3
+++ token.html	2001/04/02 04:24:00	1.4
@@ -11,7 +11,7 @@
 to WebFunds.
 </p>
 
-<h2> Choices </h2>
+<h2> Conceptual Choices </h2>
 
 There are fundamentally two choices:
 
@@ -23,7 +23,7 @@
 
 Each is discussed below.
 
-<h2> Separate Wallet within WebFunds </h2>
+<h2> 1. Separate Wallet within WebFunds </h2>
 
 <p>
 The most obvious way to add token money
@@ -95,8 +95,10 @@
 
 And, of course, all the associated server side code.
 
-<h2> SOX Request </h2>
+<h2> 2. SOX Request </h2>
 
+<h3> Introduction </h3>
+
 <p>
 A more subtle way to add tokens is to expand SOX.   The most
 important reason for this is that it already provides 99% of
@@ -108,8 +110,9 @@
 <p>
 Components required include
 </p>
+
 <ul><li>
-    Withdrawal Request (this is implemented currently as
+    Withdrawal Request (this is implemented currently as DepositRequest)
   </li><li>
     wallet storage method for coins (not implemented)
   </li><li>
@@ -232,32 +235,115 @@
 desirable to impose idempotency on the protocol, in that
 each request can be repeated as an expected event.
 
-<h3> Structure of Token Money within SOX </h3>
+<h2> 3. Structure of Token Money within SOX </h2>
 
+<h3> Payments </h3>
 <p>
 To facilitate the addition of other close forms of
 payment such as Token money to SOX, payments now have
 the following structure:
 </p>
 
-<img alt="Token Clases UML" SRC="token_classes.jpg" width=500 height=500>
+<img alt="Payment Clases UML" SRC="payment_classes.png" width=500>
 <p align="center">
-<b>Figure 1.  Token Classes (UML)</b>
+<b>Figure 1.  Payment Classes (UML)</b>
 
 <p>
 In order to add a token money method,
-an extended version of <code>Token.java</code>
-needs to be written.  The only one implemented at the time
-of writing is <code>RandomToken.java</code>
-so simply copy that and start hacking.
+an extended version of <code>webfunds.token.BaseToken</code>
+needs to be written within the token package.
+(At the time of writing, only
+<code>webfunds.token.chaum</code>
+and
+<code>webfunds.token.random</code>
+have been partially written.)
 </p>
 
 <p>
-Additionally, <code>PaymentFactory.java</code>
+Additionally, <code>webfunds.sox.PaymentFactory</code>
 specifies various factory methods for converting
 and processing.  Read and modify that to suit.
 </p>
 
+<h3> Tokens </h3>
+
+<p>
+Now let us turn our attention to the
+<code>webfunds.token</code>
+package.
+The
+<code>webfunds.sox.TokenPayment</code>
+class
+is basically a container for
+<code>BaseTokens</code>,
+which is the core class in the tokens package.
+That latter class is an abstract class, further refined with
+these four abstract class:
+</p>
+
+<ul><li>
+    <code>TokenBuilder</code>
+    is the class used for the client to initially create
+    a <i>proto-token</i>.
+  </li><li>
+    <code>TokenSigner</code>
+    is received by the Mint and is signed according to the
+    protocol expressed within.
+  </li><li>
+    <code>TokenSpender</code>
+    is sent back to the client as a fully signed token, ready
+    for valuable exchange.
+  </li><li>
+    <code>TokenDead</code>
+    is that which results when the token is spent and is
+    recorded as a spent token, for the purposes of closure
+    of the state machine.
+</li></ul>
+
+<img alt="Token Clases UML" SRC="token_classes.png" width=500>
+<p align="center">
+<b>Figure 2.  Token Classes (UML)</b>
+
+<p>
+Alongside the above set is a separate set of paramaters classes:
+</p>
+
+<ul><li>
+    <code>AbstractParams</code>
+    is a superclass for an encodable Paramaters class
+    (not extended by a concrete token implementation).
+  </li><li>
+    <code>AbstractPrivateParams</code>
+    is extended from the above <code>AbstractParams</code> in order
+    to sign tokens.
+  </li><li>
+    <code>AbstractPublicParams</code>
+    is extended from <code>AbstractParams</code> and
+    is made available to the client somehow so that the each
+    phase can be conducted.
+  </li><li>
+    <code>ParamsPair</code>
+    is the class used by the server-side Mint to create
+    the necessary keys or mathematical entities for one
+    token series (that is, one contract, value, series intersection).
+    It has methods to extract the private and public parts that
+    are the concrete <code>AbstractPrivateParams</code> and
+    <code>AbstractPublicParams</code> objects.
+</li></ul>
+
+<img alt="Paramater Clases UML" SRC="params_classes.png" width=500>
+<p align="center">
+<b>Figure 3.  Paramater Classes (UML)</b>
+
+
+<p>
+A concrete token implementation will extend from each of the above
+Token Classes and the Paramater Classes,
+thus resulting in seven classes.
+It in envisaged that each implementation
+will be packaged as <code>webfunds.token.<i>name</i></code>.
+</p>
+
 <h3> WebFunds Withdrawal </h3>
 
 <p>
@@ -268,33 +354,35 @@
 <h3> Depositing User Coins </h3>
 
 <p>
-Once the withdrawal is done, a payment is returned that
-carries the coins in an array of <code>Token</code> objects.
+Once the withdrawal is done, a <code>TokenPayment</code> is returned that
+carries the tokens in an array of <code>BaseToken</code> objects.
 That payment can now be treated like any other payment,
 and sent or deposited.
 </p>
 
 <p>
-At the moment, that's all you can do as there is not
-coin database.
+At the moment, that's all you can do as there is no
+client-side token database.
 </p>
 
-<h2> Server-Side </h2>
+<h2> 4. Server-Side </h2>
 
 For any method there will be the following server side
 components, all of which combined make up a Mint.
 
 <ul><li>
     A double-spending database.  This is currently
-    implemented using existing DBs and indexing off
-    the applicable <code>webfunds.sox.Token.getUniqueId</code>
+    implemented using existing DBs.  The unique identifier
+    of each token is acquired from
+    the applicable <code>webfunds.token.TokenSigner.getUniqueId</code>
     method.
   </li><li>
     The coin production unit.  This is the module that
     signs the accepted proto-token, and handles the various
     state aspects of the blinded withdrawal protocol.
     This is all implemented with calls into the
-    <code>Token</code> class.
+    <code>webfunds.token.TokenSigner</code>
+    class.
 </li></ul>
 
 <p>
@@ -302,10 +390,10 @@
 up of accounts and permitting token money to be accessed.
 </p>
 
-<h2> Project Status </h2>
+<h2> 5. Project Status </h2>
 
 <p>
-As of 05 December 2000, status is:
+As of 01 April 2001, status is:
 </p>
 
 <blockquote>
@@ -314,16 +402,19 @@
     <dd>Written, evolving to suite other parts.
         Lacks coin DB.
     <dt><b>Frontend</b>
-    <dd>Written, untested.
+    <dd>Written and tested for earlier generations.
     <dt><b>Backend</b>
-    <dd>Not touched as yet.
+    <dd>written and tested for earlier generations.
     <dt><b>Tokens</b>
-    <dd>Only Random
+    <dd>Currently in 3rd generation model,
+        with most of Chaum done, params for Random done.
 </dl>
 </blockquote>
 
 <p>
 This project advances on an any-idle-sunday basis.
+We are currently importing our 3rd generation model
+of token layout.
 </p>
 
 </body></html>



1.1                  html/guide/params_classes.png

Index: params_classes.png
===================================================================
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Index: payment_classes.png
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1.1                  html/guide/token_classes.png

Index: token_classes.png
===================================================================
‰PNG


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