# Gavin Andresen
# 2011-04-25 14:40:03
# https://bitcointalk.org/index.php?topic=6496.msg94916#msg94916

I've deployed a -testnet version of ClearCoin, at: @p{brk}
  @s{(link)} @p{par}

It is fully functional, so feel free to creates some escrow transactions and get some testnet bitcoins from the the testnet faucet (which I will eventually move to testnet.freebitcoins.appspost.com). @p{par}

For anybody else developing on App Engine, here's what I did to make it work: @p{par}

In my main.py: @p{brk}

Code:
  # Set testnet namespace                                                                                                                 @p{brk}
  if 'test' in os.environ['CURRENT_VERSION_ID']: @p{brk}
    set_namespace('testnet') @p{brk}

CURRENT_VERSION_ID is the version of your app that's running, and is set by App Engine. @p{brk}
set_namespace makes all subsequent datastore and memcache operations read/write from a different database.  So almost all of the code for ClearCoin doesn't care whether it is handling testnet coins, it just works. @p{par}

The only other change needed was a check for 'test' in os.environ['CURRENT_VERSION_ID'] when deciding which bitcoind server to use.  I run the -testnet bitcoind for ClearCoin on a different machine than the production bitcoind, so experiments on the test net won't affect the production ClearCoin at all. @p{par}

If you're not running on App Engine, you should think about building in the equivalent of CURRENT_VERSION_ID and 'set_namespace' so deploying test and production versions of your application is easy. @p{brk}