def fith

bend-collections-laws-crypto@1.0.0.0 · proofs/crypto/poly1305/final.bend:199

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/poly1305/limbs.bend as Li
import bend-collections-laws-crypto@1.0.0.0/proofs/lib/logic.bend as L
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/poly1305/value.bend as V
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/poly1305/step.bend as ST

199def fith(+h: List<&2, U32>, +hh: {ST.inv(h) == True{} : Bool}) -> {V.fit_all(h, 8n) == True{} : Bool}:
200  L.and_left(V.fit_all(h, 8n), Nat.is_le(V.v(Li.hd0(Li.skip(16n, h))), 4n), L.and_right(Nat.is_eq(V.len(h), 17n), Bool.and(V.fit_all(h, 8n), Nat.is_le(V.v(Li.hd0(Li.skip(16n, h))), 4n)), hh))