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FellowTraveler edited this page Mar 24, 2011 · 7 revisions

Whenever cash tokens (digital bearer certificates) are exchanged between the client and the server, they are stored in encrypted form, inside a purse. This purse can then be stored to disk or base-64 encoded and attached to a deposit transaction, or exchanged for new tokens, etc. Or you can re-encrypt them to your friend’s public key and send them to him. Etc.

A good wallet software will periodically scan the purses stored on your hard drive for each asset type and make sure none of the tokens are getting close to their expiration period. (And exchange them automatically if they are.)

-----BEGIN SIGNED PURSE-----
Hash: SAMY

<?xml version="1.0"?>

<purse version="1.0"
 userID=""
 assetTypeID="XUHBvdsWAEmErZMzHaRKaNPaAVsUvKwL4uLY4nOY2s4"
 serverID="44FmyPAgrmGu671RywGnhrt8aR6tzmNFn9WKQ92BXn">

<token>
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LM6hl053VsPwAgE9xXiJEamyHwM=
</token>

<token>
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UW0agpt3qwWCC8a2LxiygEBwaGQ=
</token>

<token>
AAAAgDkwXuHxrPHUFwlBM58S1rHHzHaNY65hcjIvtPg561A/BOuJF7y//+RRZYdb
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dtCtIJn8bmFW7cl4ADQyWcwCo00=
</token>

</purse>
-----BEGIN PURSE SIGNATURE-----
FXiCi1+/4GZjRF8otTamzdkxtvoM30V6WYuboR+nY0tAtNITz4210NVVMvOS7AQe
bLW87EdmoUoSK7No1YSLSX7/5LV194PzBV2dOewJ8mzBTjn+Offpt2L5KukBz4Hg
G7YCD4pR3EgSiQusaLmPNPCrBT9FTdWlKm6uKCLF0do=
-----END PURSE SIGNATURE-----
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