Who was the spy?

[eggplant107]

No: HPFGUIDX 136580

Before HBP we knew that an eavesdropper overheard half the prophecy
and told Voldemort, and we knew that a spy in the Death Eaters
organization told Dumbledore that Voldemort knew. Most of us thought
Snape was the spy and most of us were wrong, myself included. We now
know Snape was the eavesdropper, so who was the spy for the good guys?
By the way, I now think the eavesdropper heard the ENTIRE prophecy, he
just told Voldemort half.

Eggplant