Returns a json object containing mining-related information.
curl --user myuser --data-binary '{"jsonrpc":"1.0","id":"1","method":"getmininginfo","params":[]}' -H 'content-type:text/plain;' http://127.0.0.1:8332/{
"blocks": 840000,
"difficulty": 86388558925171.02,
"networkhashps": 6.12e+20,
"pooledtx": 12345,
"chain": "main"
}