Blockchain

Blockchain example.

Compile:

$ make

Run nodes and client:

$ ./node -serve::8080 -newuser:node1.key -newchain:chain1.db -loadaddr:addr.json
$ ./node -serve::9090 -newuser:node2.key -newchain:chain2.db -loadaddr:addr.json
$ ./client -loaduser:node1.key -loadaddr:addr.json