This song is super easy, you'll get it under your belt in no time. From what i 
heard of 
song the bass line goes like so:

Intro

G]-------------------|
D]-------------------|
A]-----7--------7----|
E]--5-----432--------|

Main Riff

G]-------------------|
D]-------------------|
A]------7-------7----|  < repeat through the entire song
E]--432-----432------|

END