PROOF.w4le_len: def of bend-osdev-hashes@0.1.0.0
Import: import bend-osdev-hashes@0.1.0.0/PROOF.bend as PROOF
Lines 59-63 of bend-osdev-hashes@0.1.0.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-hashes@0.1.0.0/PROOF.bend&start_line=59&end_line=63

import Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-hashes@0.1.0.0/hashes.bend as Hs

def w4le_len(x: Hs.HsW4) -> {B.Octets.len(Hs.HsW4.le(x)) == 16n : Nat}:
  match x:
    case Hs.HsW4{+a0, +a1, +a2, +a3}:
      %Equal.sym(Nat, B.Octets.len(B.Octets.of_list(B.append(B.le32(a0), B.append(B.le32(a1), B.append(B.le32(a2), B.le32(a3)))))), B.len(B.append(B.le32(a0), B.append(B.le32(a1), B.append(B.le32(a2), B.le32(a3))))), octets_len_of(B.append(B.le32(a0), B.append(B.le32(a1), B.append(B.le32(a2), B.le32(a3)))))) : {_ == 16n : Nat}
      w4le_len_list(a0, a1, a2, a3)

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.len
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=Octets.of_list
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=append
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=le32
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-bytes@0.1.1.0/bytes.bend&name=len
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-hashes@0.1.0.0/PROOF.bend&name=octets_len_of
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-hashes@0.1.0.0/PROOF.bend&name=w4le_len_list
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-hashes@0.1.0.0/hashes.bend&name=HsW4
  https://jend.leeeet.dev/definition.txt?path=bend-osdev-hashes@0.1.0.0/hashes.bend&name=HsW4.le