def pass_fin
import bend-collections@1.0.0.0/src/crypto/curve25519/field.bend as Fieldimport Base
114# carry, then fold the carry out back in: 2^256 == 38 (mod p)
115def pass_fin(r: Cr) -> List<&2, U32>:
116 match r:
117 case Cr{a, c}:
118 add0(a, U32.mul(38, c))