Contribution file encoding spec?

[patrickmao93]

Hi, I'm trying to read the curve points from the contribution files and use them for Plonk setup. But after digging through this repo, I got really dizzy trying to figure out the exact encoding structure of the files (I'm not too familiar with rust). I'm wondering if anyone could give me some pointers to how the points in the files are encoded so that I can decode them in another language. Any info is appreciated, maybe a link to a rust test where the encoding is happening would suffice. Thanks in advance!