bitcoin-cli addnode 67.82.89.67 add
bitcoin-cli getaddednodeinfo true
error code: -24
error message:
Error: Node has not been added.
bitcoin-cli getaddednodeinfo true 67.82.89.67
error code: -1
error message:
getaddednodeinfo ( "node" )
// the correct usage:
bitcoin-cli getaddednodeinfo
bitcoin-cli getaddednodeinfo 67.82.89.67
So getaddednodeinfo only have one optional argument<node>.