Catena can be used by any service or application who wants to prove a linear history of statements to its clients.

First, install Maven:

sudo apt-get install maven

If you're on Mac OS X, download the Bitcoin source code from GitHub to ~/repos/bitcoin/ (you can change set-env.sh if you want to choose a different directory) and compile the bitcoind binary using instructions in doc/build-osx.md

Then, compile Catena:

mvn compile

Then, setup your environment so that the Bitcoin-related scripts in btc-scripts/ work:

. set-env.sh

Then, run all the tests:

./test.sh

Then you can run a Catena server using ./run-server.sh (pass in -h for help) and a Catena client using ./run-client.sh.

You can play with Catena on the Bitcoin testnet network for free:

1. Get testnet Bitcoins from a free faucet like this one: https://tpfaucet.appspot.com/
2. Start the server and create a root-of-trust TXN (example here)
3. Use the server to create a config for the Catena client
4. Launch the client with the config file and wait for the statements to arrive

Some websites:

• Blocktrail.com, for browsing the testnet blockchain
  • Also, blockexplorer.com, for browsing the testnet blockchain
• Testnet faucet, for getting coins