primefield: add PrimeFieldExt trait#1809
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Adds a trait for specifying the endianness of the serialized representation of a field element as a stopgap until zkcrypto/rfcs#4 is accepted. This uses the `ByteOrder` enum and replaces the previous `FIELD_REPR_IS_BE` flag on `PrimeCurveParams`. It also means `Radix16Decomposition` now "Just Works" and doesn't need an endianness parameter passed to `new`. The `primefield::monty_field_element!` macro now writes impls for this trait, sourcing the endianness information from the `MontyFieldParams`.
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Adds a trait for specifying the endianness of the serialized representation of a field element as a stopgap until zkcrypto/rfcs#4 is accepted.
This uses the
ByteOrderenum and replaces the previousFIELD_REPR_IS_BEflag onPrimeCurveParams. It also meansRadix16Decompositionnow "Just Works" and doesn't need an endianness parameter passed tonew.The
primefield::monty_field_element!macro now writes impls for this trait, sourcing the endianness information from theMontyFieldParams.