112 lines
5.4 KiB
OCaml
112 lines
5.4 KiB
OCaml
(*****************************************************************************)
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(* *)
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(* Open Source License *)
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(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* Permission is hereby granted, free of charge, to any person obtaining a *)
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(* copy of this software and associated documentation files (the "Software"),*)
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(* to deal in the Software without restriction, including without limitation *)
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(* the rights to use, copy, modify, merge, publish, distribute, sublicense, *)
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(* and/or sell copies of the Software, and to permit persons to whom the *)
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(* Software is furnished to do so, subject to the following conditions: *)
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(* *)
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(* The above copyright notice and this permission notice shall be included *)
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(* in all copies or substantial portions of the Software. *)
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(* *)
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(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
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(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
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(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *)
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(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
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(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *)
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(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *)
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(* DEALINGS IN THE SOFTWARE. *)
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(* *)
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(*****************************************************************************)
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type error += Cannot_pay_storage_fee (* `Temporary *)
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type error += Operation_quota_exceeded (* `Temporary *)
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type error += Storage_limit_too_high (* `Permanent *)
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let () =
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let open Data_encoding in
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register_error_kind
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`Temporary
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~id:"contract.cannot_pay_storage_fee"
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~title:"Cannot pay storage fee"
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~description:"The storage fee is higher than the contract balance"
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~pp:(fun ppf () -> Format.fprintf ppf "Cannot pay storage storage fee")
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Data_encoding.empty
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(function Cannot_pay_storage_fee -> Some () | _ -> None)
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(fun () -> Cannot_pay_storage_fee) ;
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register_error_kind
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`Temporary
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~id:"storage_exhausted.operation"
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~title: "Storage quota exceeded for the operation"
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~description:
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"A script or one of its callee wrote more \
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bytes than the operation said it would"
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Data_encoding.empty
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(function Operation_quota_exceeded -> Some () | _ -> None)
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(fun () -> Operation_quota_exceeded) ;
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register_error_kind
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`Permanent
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~id:"storage_limit_too_high"
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~title: "Storage limit out of protocol hard bounds"
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~description:
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"A transaction tried to exceed the hard limit on storage"
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empty
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(function Storage_limit_too_high -> Some () | _ -> None)
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(fun () -> Storage_limit_too_high)
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let origination_burn c =
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let origination_size = Constants_storage.origination_size c in
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let cost_per_byte = Constants_storage.cost_per_byte c in
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(* the origination burn, measured in bytes *)
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Lwt.return
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Tez_repr.(cost_per_byte *? (Int64.of_int origination_size)) >>=? fun to_be_paid ->
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return (Raw_context.update_allocated_contracts_count c,
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to_be_paid)
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let record_paid_storage_space c contract =
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Contract_storage.used_storage_space c contract >>=? fun size ->
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Contract_storage.set_paid_storage_space_and_return_fees_to_pay c contract size >>=? fun (to_be_paid, c) ->
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let c = Raw_context.update_storage_space_to_pay c to_be_paid in
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let cost_per_byte = Constants_storage.cost_per_byte c in
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Lwt.return (Tez_repr.(cost_per_byte *? (Z.to_int64 to_be_paid))) >>=? fun to_burn ->
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return (c, size, to_be_paid, to_burn)
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let burn_storage_fees c ~storage_limit ~payer =
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let origination_size = Constants_storage.origination_size c in
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let c, storage_space_to_pay, allocated_contracts =
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Raw_context.clear_storage_space_to_pay c in
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let storage_space_for_allocated_contracts =
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Z.mul (Z.of_int allocated_contracts) (Z.of_int origination_size) in
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let consumed =
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Z.add storage_space_to_pay storage_space_for_allocated_contracts in
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let remaining = Z.sub storage_limit consumed in
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if Compare.Z.(remaining < Z.zero) then
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fail Operation_quota_exceeded
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else
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let cost_per_byte = Constants_storage.cost_per_byte c in
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Lwt.return (Tez_repr.(cost_per_byte *? (Z.to_int64 consumed))) >>=? fun to_burn ->
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(* Burning the fees... *)
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if Tez_repr.(to_burn = Tez_repr.zero) then
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(* If the payer was was deleted by transfering all its balance, and no space was used,
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burning zero would fail *)
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return c
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else
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trace Cannot_pay_storage_fee
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(Contract_storage.must_exist c payer >>=? fun () ->
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Contract_storage.spend_from_script c payer to_burn) >>=? fun c ->
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return c
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let check_storage_limit c ~storage_limit =
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if Compare.Z.(storage_limit > (Raw_context.constants c).hard_storage_limit_per_operation)
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|| Compare.Z.(storage_limit < Z.zero)then
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error Storage_limit_too_high
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else
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ok ()
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let start_counting_storage_fees c =
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Raw_context.init_storage_space_to_pay c
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