Source file big_map_helpers.ml

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open Protocol
open Alpha_context

let make_big_map block ~source ~key_type ~value_type key_values =
  let open Lwt_result_wrap_syntax in
  let key_type = Expr.from_string key_type in
  let value_type = Expr.from_string value_type in
  let* operation, originated =
    Op.contract_origination_hash (B block) source ~script:Op.dummy_script
  in
  let* block = Block.bake ~operation block in
  let* incr = Incremental.begin_construction block in
  let ctxt = Incremental.alpha_ctxt incr in
  let*@ ctxt, big_map_id = Big_map.fresh ~temporary:false ctxt in
  let* updates, ctxt =
    List.fold_left_es
      (fun (kvs, ctxt) (key, value) ->
        let key_hash =
          match
            Data_encoding.Binary.to_bytes_opt Script_repr.expr_encoding key
          with
          | Some bytes -> Script_expr_hash.hash_bytes [bytes]
          | None -> assert false
        in
        return ({Big_map.key; key_hash; value = Some value} :: kvs, ctxt))
      ([], ctxt)
      key_values
  in
  let*@ ctxt =
    Contract.update_script_storage
      ctxt
      originated
      key_type
      (Some
         [
           Lazy_storage.make
             Lazy_storage.Kind.Big_map
             big_map_id
             (Update
                {
                  init = Lazy_storage.Alloc Big_map.{key_type; value_type};
                  updates;
                });
         ])
  in
  return (big_map_id, ctxt)