A bitcoin transaction script language / vm implementation in python. Built based on info from the bitcoin wiki.

• Install bitcoind
  • Guide for installing using Macports on Maverick guide
• Enable the bitcoin rpc server and historical transaction indexing in ~/bitcoin.conf by adding/uncommenting the following lines and replacing bracketed things:
  • txindex=1
  • server=1
  • rpcuser=[yourUser]
  • rpcpassword=[yourPass]
  • rpcport=8332
  • rpcconnect=127.0.0.1
• Spin up a bitcoind daemon, rebuilding the historical index. This will take some time to complete; about a day for all transactions. You will be able to work with the current state of the index, though, so transactions from early blocks should work pretty quickly.

bitcoind -conf=/path/to/your/bitcoin.conf -daemon -reindex

• Get bitrans:

git clone https://github.com/hackscience/bitrans.git
cd bitrans

• Install the python ecdsa lib.
• Fire up python:

python

• Establish a connection to the bitcoind daemon

>>> import rpc
>>> s = rpc.jsonrpc("yourUser","yourPass")

• Grab a transaction
  • the transaction id could be found in https://blockchain.info/
  • for testing, we use txid = ‘fff2525b8931402dd09222c50775608f75787bd2b87e56995a7bdd30f79702c4’.
  • Note that if your bitcoind hasn’t finished reindex, the current rpcserver will just return NoneType Error.Just grab a different txid or wait until reindex finishes.

>>> import transaction
>>> t = transaction.transaction('fff2525b8931402dd09222c50775608f75787bd2b87e56995a7bdd30f79702c4',s)

• Verify the transaction:

t.verify()

Install and run nose:

pip install nose
nosetests