fees_storage.ml
(*****************************************************************************)
(* *)
(* Open Source License *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
(* *)
(* Permission is hereby granted, free of charge, to any person obtaining a *)
(* copy of this software and associated documentation files (the "Software"),*)
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(* Software is furnished to do so, subject to the following conditions: *)
(* *)
(* The above copyright notice and this permission notice shall be included *)
(* in all copies or substantial portions of the Software. *)
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(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
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(*****************************************************************************)
type error += Cannot_pay_storage_fee (* `Temporary *)
type error += Operation_quota_exceeded (* `Temporary *)
type error += Storage_limit_too_high (* `Permanent *)
let () =
let open Data_encoding in
register_error_kind
`Temporary
~id:"contract.cannot_pay_storage_fee"
~title:"Cannot pay storage fee"
~description:"The storage fee is higher than the contract balance"
~pp:(fun ppf () -> Format.fprintf ppf "Cannot pay storage storage fee")
Data_encoding.empty
(function Cannot_pay_storage_fee -> Some () | _ -> None)
(fun () -> Cannot_pay_storage_fee) ;
register_error_kind
`Temporary
~id:"storage_exhausted.operation"
~title:"Storage quota exceeded for the operation"
~description:
"A script or one of its callee wrote more bytes than the operation said \
it would"
Data_encoding.empty
(function Operation_quota_exceeded -> Some () | _ -> None)
(fun () -> Operation_quota_exceeded) ;
register_error_kind
`Permanent
~id:"storage_limit_too_high"
~title:"Storage limit out of protocol hard bounds"
~description:"A transaction tried to exceed the hard limit on storage"
empty
(function Storage_limit_too_high -> Some () | _ -> None)
(fun () -> Storage_limit_too_high)
let record_global_constant_storage_space context size =
(* Following the precedent of big_map, a key in the
global table of constants costs 65 bytes (see
[Lazy_storage_diff.Big_map.bytes_size_for_big_map_key])*)
let cost_of_key = Z.of_int 65 in
let to_be_paid = Z.add size cost_of_key in
(context, to_be_paid)
let record_paid_storage_space c contract =
Contract_storage.used_storage_space c contract >>=? fun size ->
Contract_storage.set_paid_storage_space_and_return_fees_to_pay c contract size
>>=? fun (to_be_paid, c) -> return (c, size, to_be_paid)
let source_must_exist c src =
match src with
| `Contract src -> Contract_storage.must_exist c src
| _ -> return_unit
let burn_storage_fees ?(origin = Receipt_repr.Block_application) c
~storage_limit ~payer consumed =
let remaining = Z.sub storage_limit consumed in
if Compare.Z.(remaining < Z.zero) then fail Operation_quota_exceeded
else
let cost_per_byte = Constants_storage.cost_per_byte c in
Tez_repr.(cost_per_byte *? Z.to_int64 consumed) >>?= fun to_burn ->
(* Burning the fees... *)
if Tez_repr.(to_burn = Tez_repr.zero) then
(* If the payer was deleted by transferring all its balance, and no space
was used, burning zero would fail *)
return (c, remaining, [])
else
trace
Cannot_pay_storage_fee
( source_must_exist c payer >>=? fun () ->
Token.transfer ~origin c payer `Storage_fees to_burn
>>=? fun (ctxt, balance_updates) ->
return (ctxt, remaining, balance_updates) )
let burn_origination_fees ?(origin = Receipt_repr.Block_application) c
~storage_limit ~payer =
let origination_size = Constants_storage.origination_size c in
burn_storage_fees ~origin c ~storage_limit ~payer (Z.of_int origination_size)
let check_storage_limit c ~storage_limit =
if
Compare.Z.(
storage_limit > (Raw_context.constants c).hard_storage_limit_per_operation)
|| Compare.Z.(storage_limit < Z.zero)
then error Storage_limit_too_high
else Result.return_unit