This program depends on github.com/toorop/go-pusher. Install it first with

go get github.com/toorop/go-pusher

Then run the arbot program with

go run arbot.go

or build/install the program.

It will connect to Bitstamp's socket and listen to order_book(_currencypair) channels (best 100 bids/asks). It has some predefined arbitrage paths (hops from one currency to another that end in the starting one) that it checks. When a new message is received, all paths are checked for arbitrage and updated result map is printed to stdout.