A ruby implementation of Ethereum's DEVp2p framework.
DEVp2p is build on Celluloid, which uses fibers to schedule tasks. Ruby's default limit on fiber stack size is quite small, which need to be increased by setting environment variables:
export RUBY_FIBER_VM_STACK_SIZE=104857600 # 100MB
export RUBY_FIBER_MACHINE_STACK_SIZE=1048576000