DD28: Proof of escrow
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.. note::

  The previous version of this design document has been retracted.  

Summary
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We will propose here an extension to the exchange that implements an escrow policy.


Motivation
==========

Certain types of trade, such as auctions or trades with long phases of
negotiation, require a proof of escrow of money as a guarantee in order to
participate or perform the trade.


Background and Requirements
===========================

TODO

Proposed Solution
=================

TODO

Alternatives
============

TODO

Drawbacks
=========

TODO


Discussion / Q&A
================

TODO

(This should be filled in with results from discussions on mailing lists / personal communication.)