The main riff is this:
1 + 2 + 3 + 4 + 1 + 2 + 3 + 4 +
|G|——————|——————|
|D|——————|———5-3——|
|A|-0-0-3-0-0-0-3-0-|-0-0-3-0——5-3-|
|E|——————|——————|
that’s it for most of the song except for a few parts on the chorus
and bridge where he goes:
1 + 2 + 3 + 4 + 1 + 2 + 3 + 4 + 1 + 2 + 3 + 4 +
|G|——————|——————|——————|
|D|——————|——————|——————|
|A|-3-3-3-3-3-3-3-3-|-2-2-2-2-2-2-2-2-|-0-0-0-0-0-0-0-0-|
|E|——————|——————|——————|
I don’t know the chords at the end. just pick some stuff in the key
of Am and you won’t be far off.