The getdifficulty RPC returns the proof-of-work difficulty as a multiple of the minimum difficulty.
getdifficulty none
*bitcoin-cli help getdifficulty
getdifficulty
Returns the proof-of-work difficulty as a multiple of the minimum difficulty.
Result:
n (numeric) the proof-of-work difficulty as a multiple of the minimum difficulty.
Examples:
> bitcoin-cli getdifficulty
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getdifficulty", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/