Haskoin is an implementation of the Bitcoin protocol in Haskell.

• Protocol message types (de-)serialization
• Bitcoin script interpreter
• Cryptographic ECDSA and hashing primitives
• Hierarchical Deterministic Wallet support (BIP32)
• Pay-to-script-hash (P2SH, BIP16) support
• Regular and multi-signature (BIP11) transaction support
• JSON-RPC/Stratum client library
• Mnemonic keys (BIP39)

http://hackage.haskell.org/package/haskoin

You can install the latest stable version of the haskoin package automatically through the cabal package manager:

# Compile for prodnet 
cabal install haskoin

# Compile for testnet
cabal install haskoin --flags=testnet

Commits are done through GitHub pull requests.

We do a lot of our technical discussions in the IRC channel #haskoin on chat.freenode.net.

Code guidelines:

• 80 columns.
• 4 space indentation. No tabs.
• Follow the general style of the code, whenever it makes sense.
• Purity and type-safety are important.