ticket_costs.ml
(*****************************************************************************)
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open Alpha_context
module S = Saturation_repr
module Constants = struct
let cost_collect_tickets_step = S.safe_int 80
let cost_has_tickets_of_ty type_size =
S.add (S.safe_int 10) (S.mul (S.safe_int 6) type_size)
let cost_compare_ticket_hash = S.safe_int 10
let cost_compare_key_contract = S.safe_int 10
end
let consume_gas_steps ctxt ~step_cost ~num_steps =
let ( * ) = S.mul in
if Compare.Int.(num_steps <= 0) then Ok ctxt
else
let gas =
Gas.atomic_step_cost (step_cost * Saturation_repr.safe_int num_steps)
in
Gas.consume ctxt gas
let has_tickets_of_ty_cost ty =
Constants.cost_has_tickets_of_ty
Script_typed_ir.(ty_size ty |> Type_size.to_int)
(** Reusing the gas model from [Michelson_v1_gas.Cost_of.neg]
Approximating 0.066076 x term *)
let negate_cost z =
let size = (7 + Z.numbits z) / 8 in
Gas.(S.safe_int 25 +@ S.shift_right (S.safe_int size) 4)
(** Reusing the gas model from [Michelson_v1_gas.Cost_of.add] *)
let add_int_cost = Michelson_v1_gas.Cost_of.Interpreter.add_int
(** Reusing the gas model from [Michelson_v1_gas.Cost_of.add] *)
let add_z_cost z1 z2 =
add_int_cost (Script_int.of_zint z1) (Script_int.of_zint z2)