Trying to remember which movie this is

I'm pretty sure it was Seven Psychopaths but after reading it's sypnopis and finding no mention of anything like this, I'm not sure.

All I remember is that he had an estranged granddaughter (who was a waitress at the place he'd go to breakfast?) and like, at the end of the movie she finds out that he's her grandfather, and she goes to his house and finds that he's gone and it has a note or whatever, saying that he's got all this money for her saved, so she can go take the time to find a better job that she actually likes (????) and in the house was a painting he did that morning. And at the ends of the movie Christopher Walken's character is killed with his buddy at a shootout.

I mean, I was pretty sure it was Christopher Walken in this movie.

Like I said, if it IS seven psychopaths, apparently the granddaughter wasn't relevant enough to the plot to be in the sypnopis. SMH