def child(self, offset256):
        """ Derive new public key from this key and a sha256 "offset" """
        a = bytes(self) + offset256
        s = hashlib.sha256(a).digest()
        return self.add(s)
def child(self, offset256):
        
        a = bytes(self) + offset256
        s = hashlib.sha256(a).digest()
        return self.add(s)
def child ( self , offset256 ) : a = bytes ( self ) + offset256 s = hashlib . sha256 ( a ) . digest ( ) return self . add ( s )
Derive new public key from this key and a sha256 "offset"
Derive new public key from this key and a sha256 offset