plus
add a public key to this x-only key
Return
a (key, parity) pair where key is the x-only-pubkey for this + that and parity is true if this + that is odd
Parameters
that
public key
add a public key to this x-only key
a (key, parity) pair where key is the x-only-pubkey for this + that and parity is true if this + that is odd
public key