i've only worked out the main riff but the the main riff is also
the intro/chorus and outro

main riff:

g)--7777-7777--8888--7777--7--10-8---------------------------
d)--7777-7777--8888--7777--7--10-8--9999-9999-99--88-88-88-88
a)--5555-5555--6666--5555--5--8--6--9999-9999-99--88-88-88-88