Created
August 25, 2017 22:05
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let check_merkle_lookup | |
: type a. | |
depth:int | |
-> root:Hash.Var.t | |
-> entry:Hash.Var.t | |
-> Bool_var.t list | |
-> ((hash, a) Merkle_tree.t, unit) T.t | |
= | |
fun ~depth ~root ~entry addr -> | |
let initial_path = | |
let open Value_computation in | |
let open Let_syntax in | |
let%map tree = get_state | |
and vals = List.map ~f:Bool_var.value addr | |
in | |
Merkle_tree.get_path tree vals | |
in | |
let pop = | |
let open Value_computation in | |
let open Let_syntax in | |
match%bind get_state with | |
| p :: path -> | |
let%map () = set_state path in | |
p | |
| _ -> failwith "Path not long enough" | |
in | |
with_state initial_path begin | |
let rec go (addr : Bool_var.t list) acc = | |
match addr with | |
| [] -> | |
add_constraint (Hash.Var.equal acc root) | |
| b :: addr' -> | |
let%bind h = Hash.Var.create pop in | |
let acc' = Hash.Var.hash ~swap:b acc h in | |
go addr' acc' | |
in | |
go addr entry | |
end | |
;; |
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