The bass line to this song is really simple and it took 
me about half—an—hour to learn the whole bass line. 
Anyway, this is a really nice song to play so here it is...
I dont know the exact tempo but space it out as medium — medium fast.

VERSE 1
G [————————————————————————————————]
D [——————————————————6—6—6—7—7—7—7—]
A [7—7—7—7—7—7—7—7—7———————————————]
E [————————————————————————————————]

VERSE 2 
G [————————————————————————————————]
D [————————————————————————————————]
A [————————————————————————————————]
E [0—0—0—0—0—0—0—0—0—4—4—4—5—5—5—5—]

BRIDGE
G [————————————————————————————————]
D [————————————————————————————————]
A [2—2—2—2—2—2—2—2—0———————————————]
E [————————————————————————————————]

CHORUS
G [————————————————————————————————————————————————————————————————]
D [————————————————————————————————————————————————————————————————]
A [————————222222224444444400000000————————222222220000000000000000]
E [00000000————————————————————————00000000————————————————————————]

LEAD ONTO GUITAR SOLO
G [—————————————————————————————]
D [—————————————————————————————]
A [——————————4444———————————————]
E [2222——4——5————2222——4——5—————]

FINAL 3RD
G [———————]
D [———————]
A [———————]
E [0—0—0—0]

VERSE 1 x 6
VERSE 2 x 2
BRIDGE
CHORUS 
VERSE 2 x 2
VERSE 1 x 4
VERSE 2 x 2
BRIDGE
CHORUS x 2
LEAD ONTO GUITAR SOLO
Guitar solo...so that means you take a rest...
FINAL 3RD
VERSE 2 x 2
CHORUS x 2
VERSE 2 (stop abruptly after playing last note)

I hope you enjoy playing this bass line...have fun!