def cr.vm.nth.pair
import bend-osdev-crypto@0.1.0.0/vmac.bend as Vmacimport Base
import bend-osdev-word64@0.1.0.0/word64.bend as W
330def cr.vm.nth.pair(ps: List<&2, CrU128>, i: Nat) -> CrU128:
331 match ps:
332 case Nil{}:
333 CrU128{W.W64.zero(), W.W64.zero()}
334 case Con{h, t}:
335 match i:
336 case 0n:
337 h
338 case 1n+j:
339 cr.vm.nth.pair(t, j)