interface { *nistec.P224Point | *nistec.P256Point | *nistec.P384Point | *nistec.P521Point Bytes() []byte BytesX() ([]byte, error) SetBytes([]byte) (P, error) ScalarMult(P, []byte) (P, error) ScalarBaseMult([]byte) (P, error) Add(p1, p2 P) P } func precomputeParams[P Point[P]](c *Curve[P], order []byte) { var err error c.N, err = bigmod.NewModulus(order) if err != nil { panic(err) } two, _ := bigmod.NewNat().SetBytes([]byte{2}, c.N) c.nMinus2 = bigmod.NewNat().ExpandFor(c.N).Sub(two, c.N).Bytes(c.N) } func...