Source file contract_storage.ml
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type error +=
|
Balance_too_low of Contract_repr.t * Tez_repr.t * Tez_repr.t
|
Counter_in_the_past of {
contract : Contract_repr.t;
expected : Manager_counter_repr.t;
found : Manager_counter_repr.t;
}
|
Counter_in_the_future of {
contract : Contract_repr.t;
expected : Manager_counter_repr.t;
found : Manager_counter_repr.t;
}
|
Non_existing_contract of Contract_repr.t
|
Empty_implicit_contract of Signature.Public_key_hash.t
|
Empty_implicit_delegated_contract of
Signature.Public_key_hash.t
|
Inconsistent_public_key of
Signature.Public_key.t * Signature.Public_key.t
| Failure of string
type error +=
|
Frozen_bonds_must_be_spent_at_once of
Contract_repr.t * Bond_id_repr.t
let () =
register_error_kind
`Temporary
~id:"contract.balance_too_low"
~title:"Balance too low"
~description:"An operation tried to spend more tokens than the contract has"
~pp:(fun ppf (c, b, a) ->
Format.fprintf
ppf
"Balance of contract %a too low (%a) to spend %a"
Contract_repr.pp
c
Tez_repr.pp
b
Tez_repr.pp
a)
Data_encoding.(
obj3
(req "contract" Contract_repr.encoding)
(req "balance" Tez_repr.encoding)
(req "amount" Tez_repr.encoding))
(function Balance_too_low (c, b, a) -> Some (c, b, a) | _ -> None)
(fun (c, b, a) -> Balance_too_low (c, b, a)) ;
register_error_kind
`Temporary
~id:"contract.counter_in_the_future"
~title:"Invalid counter (not yet reached) in a manager operation"
~description:"An operation assumed a contract counter in the future"
~pp:(fun ppf (contract, exp, found) ->
Format.fprintf
ppf
"Counter %a not yet reached for contract %a (expected %a)"
Manager_counter_repr.pp
found
Contract_repr.pp
contract
Manager_counter_repr.pp
exp)
Data_encoding.(
obj3
(req "contract" Contract_repr.encoding)
(req "expected" Manager_counter_repr.encoding_for_errors)
(req "found" Manager_counter_repr.encoding_for_errors))
(function
| Counter_in_the_future {contract; expected; found} ->
Some (contract, expected, found)
| _ -> None)
(fun (contract, expected, found) ->
Counter_in_the_future {contract; expected; found}) ;
register_error_kind
`Branch
~id:"contract.counter_in_the_past"
~title:"Invalid counter (already used) in a manager operation"
~description:"An operation assumed a contract counter in the past"
~pp:(fun ppf (contract, exp, found) ->
Format.fprintf
ppf
"Counter %a already used for contract %a (expected %a)"
Manager_counter_repr.pp
found
Contract_repr.pp
contract
Manager_counter_repr.pp
exp)
Data_encoding.(
obj3
(req "contract" Contract_repr.encoding)
(req "expected" Manager_counter_repr.encoding_for_errors)
(req "found" Manager_counter_repr.encoding_for_errors))
(function
| Counter_in_the_past {contract; expected; found} ->
Some (contract, expected, found)
| _ -> None)
(fun (contract, expected, found) ->
Counter_in_the_past {contract; expected; found}) ;
register_error_kind
`Temporary
~id:"contract.non_existing_contract"
~title:"Non existing contract"
~description:
"A contract handle is not present in the context (either it never was or \
it has been destroyed)"
~pp:(fun ppf contract ->
Format.fprintf ppf "Contract %a does not exist" Contract_repr.pp contract)
Data_encoding.(obj1 (req "contract" Contract_repr.encoding))
(function Non_existing_contract c -> Some c | _ -> None)
(fun c -> Non_existing_contract c) ;
register_error_kind
`Permanent
~id:"contract.manager.inconsistent_public_key"
~title:"Inconsistent public key"
~description:
"A provided manager public key is different with the public key stored \
in the contract"
~pp:(fun ppf (eh, ph) ->
Format.fprintf
ppf
"Expected manager public key %s but %s was provided"
(Signature.Public_key.to_b58check ph)
(Signature.Public_key.to_b58check eh))
Data_encoding.(
obj2
(req "public_key" Signature.Public_key.encoding)
(req "expected_public_key" Signature.Public_key.encoding))
(function Inconsistent_public_key (eh, ph) -> Some (eh, ph) | _ -> None)
(fun (eh, ph) -> Inconsistent_public_key (eh, ph)) ;
register_error_kind
`Permanent
~id:"contract.failure"
~title:"Contract storage failure"
~description:"Unexpected contract storage error"
~pp:(fun ppf s -> Format.fprintf ppf "Contract_storage.Failure %S" s)
Data_encoding.(obj1 (req "message" @@ string Plain))
(function Failure s -> Some s | _ -> None)
(fun s -> Failure s) ;
register_error_kind
`Branch
~id:"implicit.empty_implicit_contract"
~title:"Empty implicit contract"
~description:
"No manager operations are allowed on an empty implicit contract."
~pp:(fun ppf implicit ->
Format.fprintf
ppf
"Empty implicit contract (%a)"
Signature.Public_key_hash.pp
implicit)
Data_encoding.(obj1 (req "implicit" Signature.Public_key_hash.encoding))
(function Empty_implicit_contract c -> Some c | _ -> None)
(fun c -> Empty_implicit_contract c) ;
register_error_kind
`Branch
~id:"implicit.empty_implicit_delegated_contract"
~title:"Empty implicit delegated contract"
~description:"Emptying an implicit delegated account is not allowed."
~pp:(fun ppf implicit ->
Format.fprintf
ppf
"Emptying implicit delegated contract (%a)"
Signature.Public_key_hash.pp
implicit)
Data_encoding.(obj1 (req "implicit" Signature.Public_key_hash.encoding))
(function Empty_implicit_delegated_contract c -> Some c | _ -> None)
(fun c -> Empty_implicit_delegated_contract c) ;
register_error_kind
`Permanent
~id:"frozen_bonds.must_be_spent_at_once"
~title:"Partial spending of frozen bonds"
~description:"Frozen bonds must be spent at once."
~pp:(fun ppf (contract, bond_id) ->
Format.fprintf
ppf
"The frozen funds for contract (%a) and bond (%a) are not allowed to \
be partially withdrawn. The amount withdrawn must be equal to the \
entire deposit for the said bond."
Contract_repr.pp
contract
Bond_id_repr.pp
bond_id)
Data_encoding.(
obj2
(req "contract" Contract_repr.encoding)
(req "bond_id" Bond_id_repr.encoding))
(function
| Frozen_bonds_must_be_spent_at_once (c, b) -> Some (c, b) | _ -> None)
(fun (c, b) -> Frozen_bonds_must_be_spent_at_once (c, b))
let failwith msg = tzfail (Failure msg)
module Legacy_big_map_diff = struct
type item =
| Update of {
big_map : Z.t;
diff_key : Script_repr.expr;
diff_key_hash : Script_expr_hash.t;
diff_value : Script_repr.expr option;
}
| Clear of Z.t
| Copy of {src : Z.t; dst : Z.t}
| Alloc of {
big_map : Z.t;
key_type : Script_repr.expr;
value_type : Script_repr.expr;
}
type t = item list
let item_encoding =
let open Data_encoding in
union
[
case
(Tag 0)
~title:"update"
(obj5
(req "action" (constant "update"))
(req "big_map" z)
(req "key_hash" Script_expr_hash.encoding)
(req "key" Script_repr.expr_encoding)
(opt "value" Script_repr.expr_encoding))
(function
| Update {big_map; diff_key_hash; diff_key; diff_value} ->
Some ((), big_map, diff_key_hash, diff_key, diff_value)
| _ -> None)
(fun ((), big_map, diff_key_hash, diff_key, diff_value) ->
Update {big_map; diff_key_hash; diff_key; diff_value});
case
(Tag 1)
~title:"remove"
(obj2 (req "action" (constant "remove")) (req "big_map" z))
(function Clear big_map -> Some ((), big_map) | _ -> None)
(fun ((), big_map) -> Clear big_map);
case
(Tag 2)
~title:"copy"
(obj3
(req "action" (constant "copy"))
(req "source_big_map" z)
(req "destination_big_map" z))
(function Copy {src; dst} -> Some ((), src, dst) | _ -> None)
(fun ((), src, dst) -> Copy {src; dst});
case
(Tag 3)
~title:"alloc"
(obj4
(req "action" (constant "alloc"))
(req "big_map" z)
(req "key_type" Script_repr.expr_encoding)
(req "value_type" Script_repr.expr_encoding))
(function
| Alloc {big_map; key_type; value_type} ->
Some ((), big_map, key_type, value_type)
| _ -> None)
(fun ((), big_map, key_type, value_type) ->
Alloc {big_map; key_type; value_type});
]
let encoding = Data_encoding.list item_encoding
let to_lazy_storage_diff legacy_diffs =
let rev_head (diffs : (_ * (_, _, _) Lazy_storage_diff.diff) list) =
match diffs with
| [] -> []
| (_, Remove) :: _ -> diffs
| (id, Update {init; updates}) :: rest ->
(id, Update {init; updates = List.rev updates}) :: rest
in
List.fold_left
(fun (new_diff : (_ * (_, _, _) Lazy_storage_diff.diff) list) item ->
match item with
| Clear id -> (id, Lazy_storage_diff.Remove) :: rev_head new_diff
| Copy {src; dst} ->
let src =
Lazy_storage_kind.Big_map.Id
.of_legacy_USE_ONLY_IN_Legacy_big_map_diff
src
in
(dst, Lazy_storage_diff.Update {init = Copy {src}; updates = []})
:: rev_head new_diff
| Alloc {big_map; key_type; value_type} ->
( big_map,
Lazy_storage_diff.(
Update
{
init = Alloc Lazy_storage_kind.Big_map.{key_type; value_type};
updates = [];
}) )
:: rev_head new_diff
| Update
{
big_map;
diff_key = key;
diff_key_hash = key_hash;
diff_value = value;
} -> (
match new_diff with
| (id, diff) :: rest when Compare.Z.(id = big_map) ->
let diff =
match diff with
| Remove -> assert false
| Update {init; updates} ->
let updates =
Lazy_storage_kind.Big_map.{key; key_hash; value}
:: updates
in
Lazy_storage_diff.Update {init; updates}
in
(id, diff) :: rest
| new_diff ->
let updates =
[Lazy_storage_kind.Big_map.{key; key_hash; value}]
in
(big_map, Update {init = Existing; updates})
:: rev_head new_diff))
[]
legacy_diffs
|> rev_head
|> List.rev_map (fun (id, diff) ->
let id =
Lazy_storage_kind.Big_map.Id
.of_legacy_USE_ONLY_IN_Legacy_big_map_diff
id
in
Lazy_storage_diff.make Lazy_storage_kind.Big_map id diff)
let of_lazy_storage_diff diffs =
List.fold_left
(fun legacy_diffs (Lazy_storage_diff.Item (kind, id, diff)) ->
let diffs =
match kind with
| Lazy_storage_kind.Big_map -> (
let id =
Lazy_storage_kind.Big_map.Id
.to_legacy_USE_ONLY_IN_Legacy_big_map_diff
id
in
match diff with
| Remove -> [Clear id]
| Update {init; updates} -> (
let updates =
List.rev_map
(fun {Lazy_storage_kind.Big_map.key; key_hash; value} ->
Update
{
big_map = id;
diff_key = key;
diff_key_hash = key_hash;
diff_value = value;
})
updates
in
match init with
| Existing -> updates
| Copy {src} ->
let src =
Lazy_storage_kind.Big_map.Id
.to_legacy_USE_ONLY_IN_Legacy_big_map_diff
src
in
Copy {src; dst = id} :: updates
| Alloc {key_type; value_type} ->
Alloc {big_map = id; key_type; value_type} :: updates))
| _ -> []
in
diffs :: legacy_diffs)
[]
diffs
|> List.rev |> List.flatten
end
let update_script_lazy_storage c = function
| None -> return (c, Z.zero)
| Some diffs -> Lazy_storage_diff.apply c diffs
let raw_originate c ~prepaid_bootstrap_storage
contract ~script =
let open Lwt_result_syntax in
let contract = Contract_repr.Originated contract in
let* c = Storage.Contract.Spendable_balance.init c contract Tez_repr.zero in
let {Script_repr.code; storage}, lazy_storage_diff = script in
let* c, code_size = Storage.Contract.Code.init c contract code in
let* c, storage_size = Storage.Contract.Storage.init c contract storage in
let* c, lazy_storage_size = update_script_lazy_storage c lazy_storage_diff in
let total_size =
Z.add (Z.add (Z.of_int code_size) (Z.of_int storage_size)) lazy_storage_size
in
assert (Compare.Z.(total_size >= Z.zero)) ;
let prepaid_bootstrap_storage =
if prepaid_bootstrap_storage then total_size else Z.zero
in
let* c =
Storage.Contract.Paid_storage_space.init
c
contract
prepaid_bootstrap_storage
in
Storage.Contract.Used_storage_space.init c contract total_size
let create_implicit c manager ~balance =
let open Lwt_result_syntax in
let contract = Contract_repr.Implicit manager in
let* counter = Storage.Contract.Global_counter.get c in
let* c = Storage.Contract.Counter.init c contract counter in
let* c = Storage.Contract.Spendable_balance.init c contract balance in
Contract_manager_storage.init c contract (Manager_repr.Hash manager)
let delete c contract =
let open Lwt_result_syntax in
match contract with
| Contract_repr.Originated _ ->
failwith "Non implicit contracts cannot be removed"
| Implicit _ ->
let* c = Contract_delegate_storage.unlink c contract in
let update local =
let* local =
Storage.Contract.Spendable_balance.Local.remove_existing local
in
let* local = Storage.Contract.Manager.Local.remove_existing local in
Storage.Contract.Counter.Local.remove_existing local
in
let+ c, () =
Storage.Contract.with_local_context c contract (fun local ->
let+ local = update local in
(local, ()))
in
c
let allocated c contract = Storage.Contract.Spendable_balance.mem c contract
let exists c contract =
match contract with
| Contract_repr.Implicit _ -> Lwt.return_true
| Originated _ -> allocated c contract
let must_exist c contract =
let open Lwt_syntax in
let* exists_contract = exists c contract in
match exists_contract with
| true -> return_unit
| false -> tzfail (Non_existing_contract contract)
let must_be_allocated c contract =
let open Lwt_syntax in
let* is_allocated = allocated c contract in
match is_allocated with
| true -> return_unit
| false -> (
match contract with
| Implicit pkh -> tzfail (Empty_implicit_contract pkh)
| Originated _ -> tzfail (Non_existing_contract contract))
let list c = Storage.Contract.list c
let fresh_contract_from_current_nonce c =
let open Result_syntax in
let+ c, nonce = Raw_context.increment_origination_nonce c in
(c, Contract_hash.of_nonce nonce)
let originated_from_current_nonce ~since:ctxt_since ~until:ctxt_until =
let open Lwt_result_syntax in
let*? since = Raw_context.get_origination_nonce ctxt_since in
let*? until = Raw_context.get_origination_nonce ctxt_until in
let*! result =
List.filter_s
(fun contract -> exists ctxt_until (Contract_repr.Originated contract))
(Contract_repr.originated_contracts ~since ~until)
in
return result
let check_counter_increment c manager counter =
let open Lwt_result_syntax in
let contract = Contract_repr.Implicit manager in
let* contract_counter = Storage.Contract.Counter.get c contract in
let expected = Manager_counter_repr.succ contract_counter in
if Manager_counter_repr.(expected = counter) then return_unit
else if Manager_counter_repr.(expected > counter) then
tzfail (Counter_in_the_past {contract; expected; found = counter})
else tzfail (Counter_in_the_future {contract; expected; found = counter})
let increment_counter c manager =
let open Lwt_result_syntax in
let contract = Contract_repr.Implicit manager in
let* global_counter = Storage.Contract.Global_counter.get c in
let* c =
Storage.Contract.Global_counter.update
c
(Manager_counter_repr.succ global_counter)
in
let* contract_counter = Storage.Contract.Counter.get c contract in
Storage.Contract.Counter.update
c
contract
(Manager_counter_repr.succ contract_counter)
let get_script_code c contract_hash =
let contract = Contract_repr.Originated contract_hash in
Storage.Contract.Code.find c contract
let get_script c contract_hash =
let open Lwt_result_syntax in
let contract = Contract_repr.Originated contract_hash in
let* c, code = Storage.Contract.Code.find c contract in
let* c, storage = Storage.Contract.Storage.find c contract in
match (code, storage) with
| None, None -> return (c, None)
| Some code, Some storage -> return (c, Some {Script_repr.code; storage})
| None, Some _ | Some _, None -> failwith "get_script"
let get_storage ctxt contract_hash =
let open Lwt_result_syntax in
let contract = Contract_repr.Originated contract_hash in
let* result = Storage.Contract.Storage.find ctxt contract in
match result with
| ctxt, None -> return (ctxt, None)
| ctxt, Some storage ->
let*? ctxt =
Raw_context.consume_gas ctxt (Script_repr.force_decode_cost storage)
in
let*? storage = Script_repr.force_decode storage in
return (ctxt, Some storage)
let get_counter c manager =
let open Lwt_result_syntax in
let contract = Contract_repr.Implicit manager in
let* counter_opt = Storage.Contract.Counter.find c contract in
match counter_opt with
| None -> (
match contract with
| Contract_repr.Implicit _ -> Storage.Contract.Global_counter.get c
| Originated _ -> failwith "get_counter")
| Some v -> return v
let get_balance c contract =
let open Lwt_result_syntax in
let* balance_opt = Storage.Contract.Spendable_balance.find c contract in
match balance_opt with
| None -> (
match contract with
| Implicit _ -> return Tez_repr.zero
| Originated _ -> failwith "get_balance")
| Some v -> return v
let get_balance_carbonated c contract =
let open Lwt_result_syntax in
let*? c =
Raw_context.consume_gas
c
(Storage_costs.read_access ~path_length:4 ~read_bytes:8)
in
let* balance = get_balance c contract in
return (c, balance)
let check_allocated_and_get_balance c pkh =
let open Lwt_result_syntax in
let* balance_opt =
Storage.Contract.Spendable_balance.find c (Contract_repr.Implicit pkh)
in
match balance_opt with
| None -> tzfail (Empty_implicit_contract pkh)
| Some balance -> return balance
let update_script_storage c contract_hash storage lazy_storage_diff =
let open Lwt_result_syntax in
let contract = Contract_repr.Originated contract_hash in
let storage = Script_repr.lazy_expr storage in
let* c, lazy_storage_size_diff =
update_script_lazy_storage c lazy_storage_diff
in
let* c, size_diff = Storage.Contract.Storage.update c contract storage in
let* previous_size = Storage.Contract.Used_storage_space.get c contract in
let new_size =
Z.add previous_size (Z.add lazy_storage_size_diff (Z.of_int size_diff))
in
Storage.Contract.Used_storage_space.update c contract new_size
let spend_from_balance contract balance amount =
record_trace
(Balance_too_low (contract, balance, amount))
Tez_repr.(balance -? amount)
let check_emptiable c contract =
let open Lwt_result_syntax in
match contract with
| Contract_repr.Originated _ -> return_unit
| Implicit pkh -> (
let* delegate = Contract_delegate_storage.find c contract in
match delegate with
| Some pkh' ->
if Signature.Public_key_hash.equal pkh pkh' then return_unit
else
tzfail (Empty_implicit_delegated_contract pkh)
| None -> return_unit)
let spend_only_call_from_token c contract amount =
let open Lwt_result_syntax in
let* balance = Storage.Contract.Spendable_balance.find c contract in
let balance = Option.value balance ~default:Tez_repr.zero in
let*? new_balance = spend_from_balance contract balance amount in
let* c = Storage.Contract.Spendable_balance.update c contract new_balance in
let* c = Stake_storage.remove_contract_delegated_stake c contract amount in
let+ () =
when_
Tez_repr.(new_balance <= Tez_repr.zero)
(fun () -> check_emptiable c contract)
in
c
let credit_only_call_from_token c contract amount =
let open Lwt_result_syntax in
let* balance_opt = Storage.Contract.Spendable_balance.find c contract in
match balance_opt with
| None -> (
match contract with
| Originated _ -> tzfail (Non_existing_contract contract)
| Implicit manager -> create_implicit c manager ~balance:amount)
| Some balance ->
let*? balance = Tez_repr.(amount +? balance) in
let* c = Storage.Contract.Spendable_balance.update c contract balance in
Stake_storage.add_contract_delegated_stake c contract amount
let init c =
let open Lwt_result_syntax in
let* c = Storage.Contract.Global_counter.init c Manager_counter_repr.init in
Lazy_storage_diff.init c
let used_storage_space c contract =
let open Lwt_result_syntax in
let+ value = Storage.Contract.Used_storage_space.find c contract in
Option.value ~default:Z.zero value
let paid_storage_space c contract =
let open Lwt_result_syntax in
let+ value = Storage.Contract.Paid_storage_space.find c contract in
Option.value ~default:Z.zero value
let set_paid_storage_space_and_return_fees_to_pay c contract new_storage_space =
let open Lwt_result_syntax in
let* already_paid_space =
Storage.Contract.Paid_storage_space.get c contract
in
if Compare.Z.(already_paid_space >= new_storage_space) then return (Z.zero, c)
else
let to_pay = Z.sub new_storage_space already_paid_space in
let+ c =
Storage.Contract.Paid_storage_space.update c contract new_storage_space
in
(to_pay, c)
let increase_paid_storage c contract_hash ~amount_in_bytes:storage_incr =
let open Lwt_result_syntax in
let contract = Contract_repr.Originated contract_hash in
let* already_paid_space =
Storage.Contract.Paid_storage_space.get c contract
in
let new_storage_space = Z.add already_paid_space storage_incr in
Storage.Contract.Paid_storage_space.update c contract new_storage_space
let get_frozen_bonds ctxt contract =
let open Lwt_result_syntax in
let+ value = Storage.Contract.Total_frozen_bonds.find ctxt contract in
Option.value ~default:Tez_repr.zero value
let get_balance_and_frozen_bonds ctxt contract =
let open Lwt_result_syntax in
let* balance = Storage.Contract.Spendable_balance.get ctxt contract in
let* total_bonds = get_frozen_bonds ctxt contract in
Lwt.return Tez_repr.(balance +? total_bonds)
let bond_allocated ctxt contract bond_id =
Storage.Contract.Frozen_bonds.mem (ctxt, contract) bond_id
let find_bond ctxt contract bond_id =
Storage.Contract.Frozen_bonds.find (ctxt, contract) bond_id
(** PRE : [amount > 0], fulfilled by unique caller [Token.transfer]. *)
let spend_bond_only_call_from_token ctxt contract bond_id amount =
let open Lwt_result_syntax in
let* () =
fail_when Tez_repr.(amount = zero) (Failure "Expecting : [amount > 0]")
in
let* ctxt =
Stake_storage.remove_contract_delegated_stake ctxt contract amount
in
let* ctxt, frozen_bonds =
Storage.Contract.Frozen_bonds.get (ctxt, contract) bond_id
in
let*? () =
error_when
Tez_repr.(frozen_bonds <> amount)
(Frozen_bonds_must_be_spent_at_once (contract, bond_id))
in
let* ctxt, _ =
Storage.Contract.Frozen_bonds.remove_existing (ctxt, contract) bond_id
in
let* total = Storage.Contract.Total_frozen_bonds.get ctxt contract in
let*? new_total = Tez_repr.(total -? amount) in
if Tez_repr.(new_total = zero) then
Storage.Contract.Total_frozen_bonds.remove_existing ctxt contract
else Storage.Contract.Total_frozen_bonds.update ctxt contract new_total
(** PRE : [amount > 0], fulfilled by unique caller [Token.transfer]. *)
let credit_bond_only_call_from_token ctxt contract bond_id amount =
let open Lwt_result_syntax in
let* () =
fail_when Tez_repr.(amount = zero) (Failure "Expecting : [amount > 0]")
in
let* ctxt = Stake_storage.add_contract_delegated_stake ctxt contract amount in
let* ctxt, _ =
let* ctxt, frozen_bonds_opt =
Storage.Contract.Frozen_bonds.find (ctxt, contract) bond_id
in
match frozen_bonds_opt with
| None -> Storage.Contract.Frozen_bonds.init (ctxt, contract) bond_id amount
| Some frozen_bonds ->
let*? new_amount = Tez_repr.(frozen_bonds +? amount) in
Storage.Contract.Frozen_bonds.update (ctxt, contract) bond_id new_amount
in
let* total_opt = Storage.Contract.Total_frozen_bonds.find ctxt contract in
match total_opt with
| None -> Storage.Contract.Total_frozen_bonds.init ctxt contract amount
| Some total ->
let*? new_total = Tez_repr.(total +? amount) in
Storage.Contract.Total_frozen_bonds.update ctxt contract new_total
let has_frozen_bonds ctxt contract =
let open Lwt_result_syntax in
let*! result = Storage.Contract.Total_frozen_bonds.mem ctxt contract in
return result
let has_frozen_deposits ctxt contract =
let open Lwt_result_syntax in
let* pseudo = Storage.Contract.Staking_pseudotokens.find ctxt contract in
match pseudo with
| Some v when not Staking_pseudotoken_repr.(v = zero) -> return_true
| _ -> (
let* requests = Storage.Contract.Unstake_requests.find ctxt contract in
match requests with
| None | Some {delegate = _; requests = []} -> return_false
| Some _ -> return_true)
let fold_on_bond_ids ctxt contract =
Storage.Contract.fold_bond_ids (ctxt, contract)
(** Indicate whether the given implicit contract should avoid deletion
when it is emptied. *)
let should_keep_empty_implicit_contract ctxt contract =
let open Lwt_result_syntax in
let* has_frozen_bonds = has_frozen_bonds ctxt contract in
let* has_frozen_deposits = has_frozen_deposits ctxt contract in
if has_frozen_bonds || has_frozen_deposits then return_true
else
let* delegate_opt = Contract_delegate_storage.find ctxt contract in
match delegate_opt with
| Some _ ->
return_true
| None ->
return_false
let ensure_deallocated_if_empty ctxt contract =
let open Lwt_result_syntax in
match contract with
| Contract_repr.Originated _ ->
return ctxt
| Implicit _ -> (
let* balance_opt =
Storage.Contract.Spendable_balance.find ctxt contract
in
match balance_opt with
| None ->
return ctxt
| Some balance ->
if Tez_repr.(balance <> zero) then return ctxt
else
let* keep_contract =
should_keep_empty_implicit_contract ctxt contract
in
if keep_contract then return ctxt else delete ctxt contract)
let simulate_spending ctxt ~balance ~amount source =
let open Lwt_result_syntax in
let contract = Contract_repr.Implicit source in
let*? new_balance = spend_from_balance contract balance amount in
let* still_allocated =
if Tez_repr.(new_balance > zero) then return_true
else
let* () = check_emptiable ctxt contract in
should_keep_empty_implicit_contract ctxt contract
in
return (new_balance, still_allocated)
let get_total_supply ctxt = Storage.Contract.Total_supply.get ctxt
module For_RPC = struct
let get_staked_balance ctxt =
let open Lwt_result_syntax in
function
| Contract_repr.Originated _ -> return_none
| Implicit _ as contract -> (
let* delegate_opt = Storage.Contract.Delegate.find ctxt contract in
match delegate_opt with
| None -> return_none
| Some delegate ->
let* own_frozen_deposits =
Staking_pseudotokens_storage.For_RPC.staked_balance
ctxt
~delegate
~contract
in
return (Some own_frozen_deposits))
let get_unstaked_balance ctxt =
let open Lwt_result_syntax in
function
| Contract_repr.Originated _ -> return_none
| Implicit _ as contract -> (
let* result =
Unstake_requests_storage.prepare_finalize_unstake
ctxt
~for_next_cycle_use_only_after_slashing:false
contract
in
match result with
| None -> return_some (Tez_repr.zero, Tez_repr.zero)
| Some {finalizable; unfinalizable} ->
let* unfinalizable_requests =
Unstake_requests_storage.For_RPC
.apply_slash_to_unstaked_unfinalizable
ctxt
unfinalizable
in
let*? sum_unfinalizable =
List.fold_left_e
(fun acc (_cycle, tz) -> Tez_repr.(acc +? tz))
Tez_repr.zero
unfinalizable_requests
in
let*? sum_finalizable =
List.fold_left_e
(fun acc (_, _cycle, tz) -> Tez_repr.(acc +? tz))
Tez_repr.zero
finalizable
in
return_some (sum_unfinalizable, sum_finalizable))
let get_unstaked_frozen_balance ctxt contract =
let open Lwt_result_syntax in
let* balance_opt = get_unstaked_balance ctxt contract in
match balance_opt with
| None -> return_none
| Some (amount, _) -> return_some amount
let get_unstaked_finalizable_balance ctxt contract =
let open Lwt_result_syntax in
let* balance_opt = get_unstaked_balance ctxt contract in
match balance_opt with
| None -> return_none
| Some (_, amount) -> return_some amount
let get_full_balance ctxt contract =
let open Lwt_result_syntax in
let* balance_n_frozen = get_balance_and_frozen_bonds ctxt contract in
let* s = get_staked_balance ctxt contract in
let staked = Option.value ~default:Tez_repr.zero s in
let* us = get_unstaked_balance ctxt contract in
let u_frozen, u_final =
Option.value ~default:(Tez_repr.zero, Tez_repr.zero) us
in
Tez_repr.(
let*? x = balance_n_frozen +? staked in
let*? y = u_frozen +? x in
let*? z = u_final +? y in
return z)
end