happen on the heap. var out [p256ElementLen]byte return e.bytes(&out) } func (e *P256Element) bytes(out *[p256ElementLen]byte) []byte { var tmp p256NonMontgomeryDom p256FromMontgomery(&tmp, &e.x) p256ToBytes(out, (*p256UntypedFieldElem)(&tmp)) p256InvertEndianness(out[:]) return out[:] } // SetBytes sets e = v, where v is a big-endian 32-byte encoding, and returns e. // If v is not 32 bytes or it encodes a value higher than 2^256 - 2^224 + 2^192 + 2^96 - 1, // SetBytes returns nil and an error, and e...