Hello colleagues,

I have been working on support for two particularly strange GOST
curves, which are defined in Weierstrass form, but there exists a
birationally equivalent Untwisted Edwards form (so all sign/verify
calculations should be done in Edwards form).
Major issues came from the fact that I have tried defining generator
point in Edwards form (which is more logical).

During this rework I thought about switching ecc_point from bearing
just x and y coordinates to have per-curve defined coordinates (like
projectile or inverted).

WDYT?

-- 
With best wishes
Dmitry
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