law ok_len
import lawful-bytes@0.1.1.0/proof_core.bend as ProofCoreimport Base
import lawful-bytes@0.1.1.0/defs.bend as D
import lawful-arrays@0.1.0.0/proof_tree.bend as P
260law ok_len:
261 for +len: U32
262 for +t: P.Tree<U32>
263 for +d: Nat
264 for +h: {D.ok(BT(len, t), d) == True{} : Bool}
265 {Nat.is_le(U32.to_nat(len), Nat.mul(4n, Nat.pow(2n, d))) == True{} : Bool}