Source file sc_rollup_arith.ml
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open Sc_rollup_repr
module PS = Sc_rollup_PVM_sig
type error +=
| Arith_proof_production_failed
| Arith_output_proof_production_failed
| Arith_invalid_claim_about_outbox
let () =
let open Data_encoding in
let msg = "Invalid claim about outbox" in
register_error_kind
`Permanent
~id:"smart_rollup_arith_invalid_claim_about_outbox"
~title:msg
~pp:(fun fmt () -> Format.pp_print_string fmt msg)
~description:msg
unit
(function Arith_invalid_claim_about_outbox -> Some () | _ -> None)
(fun () -> Arith_invalid_claim_about_outbox) ;
let msg = "Output proof production failed" in
register_error_kind
`Permanent
~id:"smart_rollup_arith_output_proof_production_failed"
~title:msg
~pp:(fun fmt () -> Format.fprintf fmt "%s" msg)
~description:msg
unit
(function Arith_output_proof_production_failed -> Some () | _ -> None)
(fun () -> Arith_output_proof_production_failed) ;
let msg = "Proof production failed" in
register_error_kind
`Permanent
~id:"smart_rollup_arith_proof_production_failed"
~title:msg
~pp:(fun fmt () -> Format.fprintf fmt "%s" msg)
~description:msg
unit
(function Arith_proof_production_failed -> Some () | _ -> None)
(fun () -> Arith_proof_production_failed)
module type S = sig
include PS.S
val parse_boot_sector : string -> string option
val pp_boot_sector : Format.formatter -> string -> unit
val pp : state -> (Format.formatter -> unit -> unit) Lwt.t
val get_tick : state -> Sc_rollup_tick_repr.t Lwt.t
type status =
| Halted
| Waiting_for_input_message
| Waiting_for_reveal of Sc_rollup_PVM_sig.reveal
| Parsing
| Evaluating
val get_status :
is_reveal_enabled:Sc_rollup_PVM_sig.is_reveal_enabled ->
state ->
status Lwt.t
val get_outbox :
Raw_level_repr.t -> state -> Sc_rollup_PVM_sig.output list Lwt.t
type instruction =
| IPush : int -> instruction
| IAdd : instruction
| IStore : string -> instruction
val equal_instruction : instruction -> instruction -> bool
val pp_instruction : Format.formatter -> instruction -> unit
val get_parsing_result : state -> bool option Lwt.t
val get_code : state -> instruction list Lwt.t
val get_stack : state -> int list Lwt.t
val get_var : state -> string -> int option Lwt.t
val get_evaluation_result : state -> bool option Lwt.t
val get_is_stuck : state -> string option Lwt.t
end
module Make (Context : Sc_rollup_PVM_sig.Generic_pvm_context_sig) :
S
with type context = Context.Tree.t
and type state = Context.tree
and type proof = Context.proof = struct
module Tree = Context.Tree
type context = Context.Tree.t
type hash = State_hash.t
type proof = Context.proof
let proof_encoding = Context.proof_encoding
let proof_start_state proof = Context.proof_before proof
let proof_stop_state proof = Context.proof_after proof
let parse_boot_sector s = Some s
let pp_boot_sector fmt s = Format.fprintf fmt "%s" s
type tree = Tree.tree
type status =
| Halted
| Waiting_for_input_message
| Waiting_for_reveal of Sc_rollup_PVM_sig.reveal
| Parsing
| Evaluating
type instruction =
| IPush : int -> instruction
| IAdd : instruction
| IStore : string -> instruction
let equal_instruction i1 i2 =
match (i1, i2) with
| IPush x, IPush y -> Compare.Int.(x = y)
| IAdd, IAdd -> true
| IStore x, IStore y -> Compare.String.(x = y)
| _, _ -> false
let pp_instruction fmt = function
| IPush x -> Format.fprintf fmt "push(%d)" x
| IAdd -> Format.fprintf fmt "add"
| IStore x -> Format.fprintf fmt "store(%s)" x
let check_dissection ~default_number_of_sections ~start_chunk ~stop_chunk =
let open Sc_rollup_dissection_chunk_repr in
let dist = Sc_rollup_tick_repr.distance start_chunk.tick stop_chunk.tick in
let section_maximum_size = Z.div dist (Z.of_int 2) in
Sc_rollup_dissection_chunk_repr.(
default_check
~section_maximum_size
~check_sections_number:default_check_sections_number
~default_number_of_sections
~start_chunk
~stop_chunk)
module State = struct
type state = tree
module Monad : sig
type 'a t
val run : 'a t -> state -> (state * 'a option) Lwt.t
val is_stuck : string option t
val internal_error : string -> 'a t
val return : 'a -> 'a t
module Syntax : sig
val ( let* ) : 'a t -> ('a -> 'b t) -> 'b t
end
val remove : Tree.key -> unit t
val find_value : Tree.key -> 'a Data_encoding.t -> 'a option t
val children : Tree.key -> 'a Data_encoding.t -> (string * 'a) list t
val get_value : default:'a -> Tree.key -> 'a Data_encoding.t -> 'a t
val set_value : Tree.key -> 'a Data_encoding.t -> 'a -> unit t
end = struct
type 'a t = state -> (state * 'a option) Lwt.t
let return x state = Lwt.return (state, Some x)
let bind m f state =
let open Lwt_syntax in
let* state, res = m state in
match res with None -> return (state, None) | Some res -> f res state
module Syntax = struct
let ( let* ) = bind
end
let run m state = m state
let internal_error_key = ["internal_error"]
let internal_error msg tree =
let open Lwt_syntax in
let* tree = Tree.add tree internal_error_key (Bytes.of_string msg) in
return (tree, None)
let is_stuck tree =
let open Lwt_syntax in
let* v = Tree.find tree internal_error_key in
return (tree, Some (Option.map Bytes.to_string v))
let remove key tree =
let open Lwt_syntax in
let* tree = Tree.remove tree key in
return (tree, Some ())
let decode encoding bytes state =
let open Lwt_syntax in
match Data_encoding.Binary.of_bytes_opt encoding bytes with
| None -> internal_error "Error during decoding" state
| Some v -> return (state, Some v)
let find_value key encoding state =
let open Lwt_syntax in
let* obytes = Tree.find state key in
match obytes with
| None -> return (state, Some None)
| Some bytes ->
let* state, value = decode encoding bytes state in
return (state, Some value)
let children key encoding state =
let open Lwt_syntax in
let* children = Tree.list state key in
let rec aux = function
| [] -> return (state, Some [])
| (key, tree) :: children -> (
let* obytes = Tree.to_value tree in
match obytes with
| None -> internal_error "Invalid children" state
| Some bytes -> (
let* state, v = decode encoding bytes state in
match v with
| None -> return (state, None)
| Some v -> (
let* state, l = aux children in
match l with
| None -> return (state, None)
| Some l -> return (state, Some ((key, v) :: l)))))
in
aux children
let get_value ~default key encoding =
let open Syntax in
let* ov = find_value key encoding in
match ov with None -> return default | Some x -> return x
let set_value key encoding value tree =
let open Lwt_syntax in
Data_encoding.Binary.to_bytes_opt encoding value |> function
| None -> internal_error "Internal_Error during encoding" tree
| Some bytes ->
let* tree = Tree.add tree key bytes in
return (tree, Some ())
end
open Monad
module Make_var (P : sig
type t
val name : string
val initial : t
val pp : Format.formatter -> t -> unit
val encoding : t Data_encoding.t
end) =
struct
let key = [P.name]
let create = set_value key P.encoding P.initial
let get =
let open Monad.Syntax in
let* v = find_value key P.encoding in
match v with
| None ->
return P.initial
| Some v -> return v
let set = set_value key P.encoding
let pp =
let open Monad.Syntax in
let* v = get in
return @@ fun fmt () -> Format.fprintf fmt "@[%s : %a@]" P.name P.pp v
end
module Make_dict (P : sig
type t
val name : string
val pp : Format.formatter -> t -> unit
val encoding : t Data_encoding.t
end) =
struct
let key k = [P.name; k]
let get k = find_value (key k) P.encoding
let set k v = set_value (key k) P.encoding v
let entries = children [P.name] P.encoding
let pp =
let open Monad.Syntax in
let* l = entries in
let pp_elem fmt (key, value) =
Format.fprintf fmt "@[%s : %a@]" key P.pp value
in
return @@ fun fmt () -> Format.pp_print_list pp_elem fmt l
end
module Make_deque (P : sig
type t
val name : string
val encoding : t Data_encoding.t
end) =
struct
let head_key = [P.name; "head"]
let end_key = [P.name; "end"]
let get_head = get_value ~default:Z.zero head_key Data_encoding.z
let set_head = set_value head_key Data_encoding.z
let get_end = get_value ~default:(Z.of_int 0) end_key Data_encoding.z
let set_end = set_value end_key Data_encoding.z
let idx_key idx = [P.name; Z.to_string idx]
let top =
let open Monad.Syntax in
let* head_idx = get_head in
let* end_idx = get_end in
let* v = find_value (idx_key head_idx) P.encoding in
if Z.(leq end_idx head_idx) then return None
else
match v with
| None -> assert false
| Some x -> return (Some x)
let push x =
let open Monad.Syntax in
let* head_idx = get_head in
let head_idx' = Z.pred head_idx in
let* () = set_head head_idx' in
set_value (idx_key head_idx') P.encoding x
let pop =
let open Monad.Syntax in
let* head_idx = get_head in
let* end_idx = get_end in
if Z.(leq end_idx head_idx) then return None
else
let* v = find_value (idx_key head_idx) P.encoding in
match v with
| None -> assert false
| Some x ->
let* () = remove (idx_key head_idx) in
let head_idx = Z.succ head_idx in
let* () = set_head head_idx in
return (Some x)
let inject x =
let open Monad.Syntax in
let* end_idx = get_end in
let end_idx' = Z.succ end_idx in
let* () = set_end end_idx' in
set_value (idx_key end_idx) P.encoding x
let to_list =
let open Monad.Syntax in
let* head_idx = get_head in
let* end_idx = get_end in
let rec aux l idx =
if Z.(lt idx head_idx) then return l
else
let* v = find_value (idx_key idx) P.encoding in
match v with
| None -> assert false
| Some v -> aux (v :: l) (Z.pred idx)
in
aux [] (Z.pred end_idx)
let clear = remove [P.name]
end
module Current_tick = Make_var (struct
include Sc_rollup_tick_repr
let name = "tick"
end)
module Vars = Make_dict (struct
type t = int
let name = "vars"
let encoding = Data_encoding.int31
let pp fmt x = Format.fprintf fmt "%d" x
end)
module Stack = Make_deque (struct
type t = int
let name = "stack"
let encoding = Data_encoding.int31
end)
module Code = Make_deque (struct
type t = instruction
let name = "code"
let encoding =
Data_encoding.(
union
[
case
~title:"push"
(Tag 0)
Data_encoding.int31
(function IPush x -> Some x | _ -> None)
(fun x -> IPush x);
case
~title:"add"
(Tag 1)
Data_encoding.unit
(function IAdd -> Some () | _ -> None)
(fun () -> IAdd);
case
~title:"store"
(Tag 2)
Data_encoding.(string Plain)
(function IStore x -> Some x | _ -> None)
(fun x -> IStore x);
])
end)
module Boot_sector = Make_var (struct
type t = string
let name = "boot_sector"
let initial = ""
let encoding = Data_encoding.(string Plain)
let pp fmt s = Format.fprintf fmt "%s" s
end)
module Status = Make_var (struct
type t = status
let initial = Halted
let encoding =
let open Data_encoding in
let kind name = req "status" (constant name) in
let case_halted =
case
~title:"Halted"
(Tag 0)
(obj1 (kind "halted"))
(function Halted -> Some () | _ -> None)
(fun () -> Halted)
in
let case_waiting_for_input_message =
case
~title:"Waiting_for_input_message"
(Tag 1)
(obj1 (kind "waiting_for_input_message"))
(function Waiting_for_input_message -> Some () | _ -> None)
(fun () -> Waiting_for_input_message)
in
let case_waiting_for_reveal =
case
~title:"Waiting_for_reveal"
(Tag 2)
(obj2
(kind "waiting_for_reveal")
(req "reveal" Sc_rollup_PVM_sig.reveal_encoding))
(function Waiting_for_reveal r -> Some ((), r) | _ -> None)
(fun ((), r) -> Waiting_for_reveal r)
in
let case_parsing =
case
~title:"Parsing"
(Tag 3)
(obj1 (kind "parsing"))
(function Parsing -> Some () | _ -> None)
(fun () -> Parsing)
in
let case_evaluating =
case
~title:"Evaluating"
(Tag 4)
(obj1 (kind "evaluating"))
(function Evaluating -> Some () | _ -> None)
(fun () -> Evaluating)
in
union
[
case_halted;
case_waiting_for_input_message;
case_waiting_for_reveal;
case_parsing;
case_evaluating;
]
let name = "status"
let string_of_status = function
| Halted -> "Halted"
| Waiting_for_input_message -> "Waiting for input message"
| Waiting_for_reveal reveal ->
Format.asprintf
"Waiting for reveal %a"
Sc_rollup_PVM_sig.pp_reveal
reveal
| Parsing -> "Parsing"
| Evaluating -> "Evaluating"
let pp fmt status = Format.fprintf fmt "%s" (string_of_status status)
end)
module Required_reveal = Make_var (struct
type t = PS.reveal option
let initial = None
let encoding = Data_encoding.option PS.reveal_encoding
let name = "required_reveal"
let pp fmt v =
match v with
| None -> Format.fprintf fmt "<none>"
| Some h -> PS.pp_reveal fmt h
end)
module Metadata = Make_var (struct
type t = Sc_rollup_metadata_repr.t option
let initial = None
let encoding = Data_encoding.option Sc_rollup_metadata_repr.encoding
let name = "metadata"
let pp fmt v =
match v with
| None -> Format.fprintf fmt "<none>"
| Some v -> Sc_rollup_metadata_repr.pp fmt v
end)
module Current_level = Make_var (struct
type t = Raw_level_repr.t
let initial = Raw_level_repr.root
let encoding = Raw_level_repr.encoding
let name = "current_level"
let pp = Raw_level_repr.pp
end)
type dal_slots_list = Dal_slot_index_repr.t list
let dal_slots_list_encoding =
Data_encoding.list Dal_slot_index_repr.encoding
let pp_dal_slots_list =
Format.pp_print_list
~pp_sep:(fun fmt () -> Format.pp_print_string fmt ":")
Dal_slot_index_repr.pp
type dal_parameters = {
attestation_lag : int32;
number_of_pages : int32;
tracked_slots : dal_slots_list;
}
module Dal_parameters = Make_var (struct
type t = dal_parameters
let initial =
{attestation_lag = 1l; number_of_pages = 0l; tracked_slots = []}
let encoding =
let open Data_encoding in
conv
(fun {attestation_lag; number_of_pages; tracked_slots} ->
(attestation_lag, number_of_pages, tracked_slots))
(fun (attestation_lag, number_of_pages, tracked_slots) ->
{attestation_lag; number_of_pages; tracked_slots})
(obj3
(req "attestation_lag" int32)
(req "number_of_pages" int32)
(req "tracked_slots" dal_slots_list_encoding))
let name = "dal_parameters"
let pp fmt {attestation_lag; number_of_pages; tracked_slots} =
Format.fprintf
fmt
"dal:%ld:%ld:%a"
attestation_lag
number_of_pages
pp_dal_slots_list
tracked_slots
end)
module Dal_remaining_slots = Make_var (struct
type t = dal_slots_list
let initial = []
let encoding = dal_slots_list_encoding
let name = "dal_remaining_slots"
let pp = pp_dal_slots_list
end)
module Message_counter = Make_var (struct
type t = Z.t option
let initial = None
let encoding = Data_encoding.option Data_encoding.n
let name = "message_counter"
let pp fmt = function
| None -> Format.fprintf fmt "None"
| Some c -> Format.fprintf fmt "Some %a" Z.pp_print c
end)
(** Store an internal message counter. This is used to distinguish
an unparsable external message and a internal message, which we both
treat as no-ops. *)
module Internal_message_counter = Make_var (struct
type t = Z.t
let initial = Z.zero
let encoding = Data_encoding.n
let name = "internal_message_counter"
let pp fmt c = Z.pp_print fmt c
end)
let incr_internal_message_counter =
let open Monad.Syntax in
let* current_counter = Internal_message_counter.get in
Internal_message_counter.set (Z.succ current_counter)
module Next_message = Make_var (struct
type t = string option
let initial = None
let encoding = Data_encoding.(option (string Plain))
let name = "next_message"
let pp fmt = function
| None -> Format.fprintf fmt "None"
| Some s -> Format.fprintf fmt "Some %s" s
end)
type parser_state = ParseInt | ParseVar | SkipLayout
module Lexer_state = Make_var (struct
type t = int * int
let name = "lexer_buffer"
let initial = (-1, -1)
let encoding = Data_encoding.(tup2 int31 int31)
let pp fmt (start, len) =
Format.fprintf fmt "lexer.(start = %d, len = %d)" start len
end)
module Parser_state = Make_var (struct
type t = parser_state
let name = "parser_state"
let initial = SkipLayout
let encoding =
Data_encoding.string_enum
[
("ParseInt", ParseInt);
("ParseVar", ParseVar);
("SkipLayout", SkipLayout);
]
let pp fmt = function
| ParseInt -> Format.fprintf fmt "Parsing int"
| ParseVar -> Format.fprintf fmt "Parsing var"
| SkipLayout -> Format.fprintf fmt "Skipping layout"
end)
module Parsing_result = Make_var (struct
type t = bool option
let name = "parsing_result"
let initial = None
let encoding = Data_encoding.(option bool)
let pp fmt = function
| None -> Format.fprintf fmt "n/a"
| Some true -> Format.fprintf fmt "parsing succeeds"
| Some false -> Format.fprintf fmt "parsing fails"
end)
module Evaluation_result = Make_var (struct
type t = bool option
let name = "evaluation_result"
let initial = None
let encoding = Data_encoding.(option bool)
let pp fmt = function
| None -> Format.fprintf fmt "n/a"
| Some true -> Format.fprintf fmt "evaluation succeeds"
| Some false -> Format.fprintf fmt "evaluation fails"
end)
module Output_counter = Make_var (struct
type t = Z.t
let initial = Z.zero
let name = "output_counter"
let encoding = Data_encoding.n
let pp = Z.pp_print
end)
module Output = Make_dict (struct
type t = Sc_rollup_PVM_sig.output
let name = "output"
let encoding = Sc_rollup_PVM_sig.output_encoding
let pp = Sc_rollup_PVM_sig.pp_output
end)
let pp =
let open Monad.Syntax in
let* status_pp = Status.pp in
let* message_counter_pp = Message_counter.pp in
let* next_message_pp = Next_message.pp in
let* parsing_result_pp = Parsing_result.pp in
let* parser_state_pp = Parser_state.pp in
let* lexer_state_pp = Lexer_state.pp in
let* evaluation_result_pp = Evaluation_result.pp in
let* vars_pp = Vars.pp in
let* output_pp = Output.pp in
let* stack = Stack.to_list in
let* current_tick_pp = Current_tick.pp in
return @@ fun fmt () ->
Format.fprintf
fmt
"@[<v 0 >@;\
%a@;\
%a@;\
%a@;\
%a@;\
%a@;\
%a@;\
%a@;\
tick : %a@;\
vars : %a@;\
output :%a@;\
stack : %a@;\
@]"
status_pp
()
message_counter_pp
()
next_message_pp
()
parsing_result_pp
()
parser_state_pp
()
lexer_state_pp
()
evaluation_result_pp
()
current_tick_pp
()
vars_pp
()
output_pp
()
Format.(pp_print_list pp_print_int)
stack
end
open State
type state = State.state
open Monad
let initial_state ~empty =
let m =
let open Monad.Syntax in
let* () = Status.set Halted in
return ()
in
let open Lwt_syntax in
let* state, _ = run m empty in
return state
let install_boot_sector state boot_sector =
let m =
let open Monad.Syntax in
let* () = Boot_sector.set boot_sector in
return ()
in
let open Lwt_syntax in
let* state, _ = run m state in
return state
let state_hash state =
let context_hash = Tree.hash state in
Lwt.return @@ State_hash.context_hash_to_state_hash context_hash
let pp state =
let open Lwt_syntax in
let* _, pp = Monad.run pp state in
match pp with
| None -> return @@ fun fmt _ -> Format.fprintf fmt "<opaque>"
| Some pp ->
let* state_hash = state_hash state in
return (fun fmt () ->
Format.fprintf fmt "@[%a: %a@]" State_hash.pp state_hash pp ())
let boot =
let open Monad.Syntax in
let* () = Status.create in
let* () = Next_message.create in
let* () = Status.set (Waiting_for_reveal Reveal_metadata) in
return ()
let result_of ~default m state =
let open Lwt_syntax in
let* _, v = run m state in
match v with None -> return default | Some v -> return v
let state_of m state =
let open Lwt_syntax in
let* s, _ = run m state in
return s
let get_tick = result_of ~default:Sc_rollup_tick_repr.initial Current_tick.get
let get_status ~is_reveal_enabled : status Monad.t =
let open Monad.Syntax in
let* status = Status.get in
let* current_block_level = Current_level.get in
let try_return_reveal candidate : status =
match (current_block_level, candidate) with
| _, Waiting_for_reveal candidate ->
let is_enabled = is_reveal_enabled ~current_block_level candidate in
if is_enabled then Waiting_for_reveal candidate
else
Waiting_for_reveal
(Reveal_raw_data Sc_rollup_reveal_hash.well_known_reveal_hash)
| _, _ -> candidate
in
return
@@
match status with
| Waiting_for_reveal _ -> try_return_reveal status
| s -> s
let is_input_state_monadic ~is_reveal_enabled =
let open Monad.Syntax in
let* status = get_status ~is_reveal_enabled in
match status with
| Waiting_for_input_message -> (
let* level = Current_level.get in
let* counter = Message_counter.get in
match counter with
| Some n -> return (PS.First_after (level, n))
| None -> return PS.Initial)
| Waiting_for_reveal (Reveal_raw_data _) -> (
let* r = Required_reveal.get in
match r with
| None -> internal_error "Internal error: Reveal invariant broken"
| Some reveal -> return (PS.Needs_reveal reveal))
| Waiting_for_reveal Reveal_metadata ->
return PS.(Needs_reveal Reveal_metadata)
| Waiting_for_reveal (Request_dal_page page) ->
return PS.(Needs_reveal (Request_dal_page page))
| Waiting_for_reveal Reveal_dal_parameters ->
return PS.(Needs_reveal Reveal_dal_parameters)
| Halted | Parsing | Evaluating -> return PS.No_input_required
let is_input_state ~is_reveal_enabled =
result_of ~default:PS.No_input_required
@@ is_input_state_monadic ~is_reveal_enabled
let get_current_level state =
let open Lwt_syntax in
let* _state_, current_level = Monad.run Current_level.get state in
return current_level
let get_status ~is_reveal_enabled : state -> status Lwt.t =
result_of ~default:Waiting_for_input_message (get_status ~is_reveal_enabled)
let get_outbox outbox_level state =
let open Lwt_syntax in
let+ entries = result_of ~default:[] Output.entries state in
List.filter_map
(fun (_, msg) ->
if Raw_level_repr.(msg.PS.outbox_level = outbox_level) then Some msg
else None)
entries
let get_code = result_of ~default:[] @@ Code.to_list
let get_parsing_result = result_of ~default:None @@ Parsing_result.get
let get_stack = result_of ~default:[] @@ Stack.to_list
let get_var state k = (result_of ~default:None @@ Vars.get k) state
let get_evaluation_result = result_of ~default:None @@ Evaluation_result.get
let get_is_stuck = result_of ~default:None @@ is_stuck
let start_parsing : unit t =
let open Monad.Syntax in
let* () = Status.set Parsing in
let* () = Parsing_result.set None in
let* () = Parser_state.set SkipLayout in
let* () = Lexer_state.set (0, 0) in
let* () = Code.clear in
return ()
(** Compute and set the next Dal page to request if any. Otherwise, request
the next inbox message.
The value of [target] allows to compute the next page to request: either
the first one the PVM is subscribed to, or the one after the given
(slot_index, page_index) page. *)
let next_dal_page dal_params ~target =
let open Monad.Syntax in
let open Dal_slot_repr in
let module Index = Dal_slot_index_repr in
let* case =
match (dal_params, target) with
| {tracked_slots = []; _}, `First_page _published_level ->
return `Inbox_message
| {tracked_slots = index :: rest; _}, `First_page published_level ->
let* () = Dal_remaining_slots.set rest in
return (`Dal (published_level, index, 0))
| ( {number_of_pages; _},
`Page_after {Page.slot_id = {published_level; index}; page_index} )
-> (
let page_index = page_index + 1 in
if Compare.Int.(page_index < Int32.to_int number_of_pages) then
return (`Dal (published_level, index, page_index))
else
let* remaining_slots = Dal_remaining_slots.get in
match remaining_slots with
| index :: rest ->
let* () = Dal_remaining_slots.set rest in
return (`Dal (published_level, index, 0))
| [] -> return `Inbox_message)
in
match case with
| `Dal (published_level, index, page_index) ->
let page_id = {Page.slot_id = {published_level; index}; page_index} in
let* () = Required_reveal.set @@ Some (Request_dal_page page_id) in
Status.set (Waiting_for_reveal (Request_dal_page page_id))
| `Inbox_message ->
let* () = Required_reveal.set None in
Status.set Waiting_for_input_message
(** Request a Dal page or an input message depending on the value of the given
[published_level] argument and on the content of the {Required_reveal.get}.
*)
let update_waiting_for_data_status =
let open Dal_slot_repr in
let module Index = Dal_slot_index_repr in
fun ?published_level () ->
let open Monad.Syntax in
let* dal_params = Dal_parameters.get in
if List.is_empty dal_params.tracked_slots then
Status.set Waiting_for_input_message
else
let* required_reveal = Required_reveal.get in
match (published_level, required_reveal) with
| None, None ->
Status.set Waiting_for_input_message
| Some published_level, None ->
next_dal_page dal_params ~target:(`First_page published_level)
| Some published_level, Some (Request_dal_page page_id) ->
let* remaining_slots = Dal_remaining_slots.get in
assert (
let slot_id = page_id.Page.slot_id in
let page_index = page_id.Page.page_index in
Compare.Int.(
Int32.to_int
@@ Raw_level_repr.diff published_level slot_id.published_level
= 1
&& List.is_empty remaining_slots
&& page_index = Int32.to_int dal_params.number_of_pages - 1)) ;
next_dal_page dal_params ~target:(`First_page published_level)
| None, Some (Request_dal_page page_id) ->
next_dal_page dal_params ~target:(`Page_after page_id)
| _, Some Reveal_metadata | _, Some Reveal_dal_parameters ->
assert false
| _, Some (Reveal_raw_data _) ->
let* () = Required_reveal.set None in
Status.set Waiting_for_input_message
let set_inbox_message_monadic {PS.inbox_level; message_counter; payload} =
let open Monad.Syntax in
let deserialized = Sc_rollup_inbox_message_repr.deserialize payload in
let* payload =
match deserialized with
| Error _ -> return None
| Ok (External payload) -> return (Some payload)
| Ok (Internal (Transfer {payload; destination; _})) -> (
let* () = incr_internal_message_counter in
let* (metadata : Sc_rollup_metadata_repr.t option) = Metadata.get in
match metadata with
| Some {address; _} when Address.(destination = address) -> (
match Micheline.root payload with
| Bytes (_, payload) ->
let payload = Bytes.to_string payload in
return (Some payload)
| _ -> return None)
| _ -> return None)
| Ok (Internal (Protocol_migration _)) ->
let* () = incr_internal_message_counter in
return None
| Ok (Internal Start_of_level) ->
let* () = incr_internal_message_counter in
return None
| Ok (Internal End_of_level) ->
let* () = incr_internal_message_counter in
return None
| Ok (Internal (Info_per_level _)) ->
let* () = incr_internal_message_counter in
return None
in
match payload with
| Some payload ->
let* boot_sector = Boot_sector.get in
let msg = boot_sector ^ payload in
let* () = Current_level.set inbox_level in
let* () = Message_counter.set (Some message_counter) in
let* () = Next_message.set (Some msg) in
let* () = start_parsing in
return ()
| None -> (
let* () = Current_level.set inbox_level in
let* () = Message_counter.set (Some message_counter) in
match deserialized with
| Ok (Internal Start_of_level) -> (
let* dal_params = Dal_parameters.get in
let inbox_level = Raw_level_repr.to_int32 inbox_level in
let lvl =
Int32.sub (Int32.sub inbox_level dal_params.attestation_lag) 1l
in
match Raw_level_repr.of_int32 lvl with
| Error _ ->
return ()
| Ok published_level -> (
let* metadata = Metadata.get in
match metadata with
| None ->
assert false
| Some {origination_level; _} ->
if Raw_level_repr.(origination_level >= published_level)
then
Status.set Waiting_for_input_message
else
update_waiting_for_data_status ~published_level ()))
| _ -> Status.set Waiting_for_input_message)
let reveal_monadic reveal_data =
let open Monad.Syntax in
match reveal_data with
| PS.Raw_data data ->
let* () = Next_message.set (Some data) in
let* () = start_parsing in
return ()
| PS.Metadata metadata ->
let* () = Metadata.set (Some metadata) in
let* () = Status.set Waiting_for_input_message in
return ()
| PS.Dal_page None ->
update_waiting_for_data_status ()
| PS.Dal_page (Some data) ->
let* () = Next_message.set (Some (Bytes.to_string data)) in
let* () = start_parsing in
return ()
| PS.Dal_parameters _ ->
assert false
let ticked m =
let open Monad.Syntax in
let* tick = Current_tick.get in
let* () = Current_tick.set (Sc_rollup_tick_repr.next tick) in
m
let set_input_monadic input =
match input with
| PS.Inbox_message m -> set_inbox_message_monadic m
| PS.Reveal s -> reveal_monadic s
let set_input input = set_input_monadic input |> ticked |> state_of
let next_char =
let open Monad.Syntax in
Lexer_state.(
let* start, len = get in
set (start, len + 1))
let no_message_to_lex () =
internal_error "lexer: There is no input message to lex"
let current_char =
let open Monad.Syntax in
let* start, len = Lexer_state.get in
let* msg = Next_message.get in
match msg with
| None -> no_message_to_lex ()
| Some s ->
if Compare.Int.(start + len < String.length s) then
return (Some s.[start + len])
else return None
let lexeme =
let open Monad.Syntax in
let* start, len = Lexer_state.get in
let* msg = Next_message.get in
match msg with
| None -> no_message_to_lex ()
| Some s ->
let* () = Lexer_state.set (start + len, 0) in
return (String.sub s start len)
let push_int_literal =
let open Monad.Syntax in
let* s = lexeme in
match int_of_string_opt s with
| Some x -> Code.inject (IPush x)
| None -> assert false
let push_var =
let open Monad.Syntax in
let* s = lexeme in
Code.inject (IStore s)
let start_evaluating : unit t =
let open Monad.Syntax in
let* () = Status.set Evaluating in
let* () = Evaluation_result.set None in
return ()
let stop_parsing outcome =
let open Monad.Syntax in
let* () = Parsing_result.set (Some outcome) in
start_evaluating
let stop_evaluating outcome =
let open Monad.Syntax in
let* () = Evaluation_result.set (Some outcome) in
update_waiting_for_data_status ()
let parse : unit t =
let open Monad.Syntax in
let produce_add =
let* (_ : string) = lexeme in
let* () = next_char in
let* () = Code.inject IAdd in
return ()
in
let produce_int =
let* () = push_int_literal in
let* () = Parser_state.set SkipLayout in
return ()
in
let produce_var =
let* () = push_var in
let* () = Parser_state.set SkipLayout in
return ()
in
let is_digit d = Compare.Char.(d >= '0' && d <= '9') in
let is_letter d =
Compare.Char.((d >= 'a' && d <= 'z') || (d >= 'A' && d <= 'Z'))
in
let is_identifier_char d =
is_letter d || is_digit d
|| Compare.Char.(d = ':')
|| Compare.Char.(d = '%')
in
let* parser_state = Parser_state.get in
match parser_state with
| ParseInt -> (
let* char = current_char in
match char with
| Some d when is_digit d -> next_char
| Some '+' ->
let* () = produce_int in
let* () = produce_add in
return ()
| Some (' ' | '\n') ->
let* () = produce_int in
let* () = next_char in
return ()
| None ->
let* () = push_int_literal in
stop_parsing true
| _ -> stop_parsing false)
| ParseVar -> (
let* char = current_char in
match char with
| Some d when is_identifier_char d -> next_char
| Some '+' ->
let* () = produce_var in
let* () = produce_add in
return ()
| Some (' ' | '\n') ->
let* () = produce_var in
let* () = next_char in
return ()
| None ->
let* () = push_var in
stop_parsing true
| _ -> stop_parsing false)
| SkipLayout -> (
let* char = current_char in
match char with
| Some (' ' | '\n') -> next_char
| Some '+' -> produce_add
| Some d when is_digit d ->
let* (_ : string) = lexeme in
let* () = next_char in
let* () = Parser_state.set ParseInt in
return ()
| Some d when is_letter d ->
let* (_ : string) = lexeme in
let* () = next_char in
let* () = Parser_state.set ParseVar in
return ()
| None -> stop_parsing true
| _ -> stop_parsing false)
let output (destination, entrypoint) v =
let open Monad.Syntax in
let open Sc_rollup_outbox_message_repr in
let* counter = Output_counter.get in
let* () = Output_counter.set (Z.succ counter) in
let unparsed_parameters =
Micheline.(Int ((), Z.of_int v) |> strip_locations)
in
let transaction = {unparsed_parameters; destination; entrypoint} in
let message = Atomic_transaction_batch {transactions = [transaction]} in
let* outbox_level = Current_level.get in
let output =
Sc_rollup_PVM_sig.{outbox_level; message_index = counter; message}
in
Output.set (Z.to_string counter) output
let identifies_target_contract x =
let open Option_syntax in
match String.split_on_char '%' x with
| destination :: entrypoint -> (
match Contract_hash.of_b58check_opt destination with
| None ->
if Compare.String.(x = "out") then
return (Contract_hash.zero, Entrypoint_repr.default)
else fail
| Some destination ->
let* entrypoint =
match entrypoint with
| [] -> return Entrypoint_repr.default
| _ ->
let* entrypoint =
Non_empty_string.of_string (String.concat "" entrypoint)
in
let* entrypoint =
Entrypoint_repr.of_annot_lax_opt entrypoint
in
return entrypoint
in
return (destination, entrypoint))
| [] -> fail
let evaluate_preimage_request hash =
let open Monad.Syntax in
match Sc_rollup_reveal_hash.of_hex hash with
| None -> stop_evaluating false
| Some hash ->
let reveal : Sc_rollup_PVM_sig.reveal = Reveal_raw_data hash in
let* () = Required_reveal.set (Some reveal) in
let* () = Status.set (Waiting_for_reveal reveal) in
return ()
let evaluate_dal_parameters dal_directive =
let dal_params =
let open Option_syntax in
match String.split_on_char ':' dal_directive with
| number_of_slots :: attestation_lag :: number_of_pages :: tracked_slots
->
let* number_of_slots = Int32.of_string_opt number_of_slots in
let* attestation_lag = Int32.of_string_opt attestation_lag in
let* number_of_pages = Int32.of_string_opt number_of_pages in
let* tracked_slots =
let rec aux acc sl =
match sl with
| [] -> return (List.rev acc)
| s :: rest ->
let* dal_slot_int = int_of_string_opt s in
let* dal_slot =
Dal_slot_index_repr.of_int_opt
~number_of_slots:(Int32.to_int number_of_slots)
dal_slot_int
in
(aux [@tailcall]) (dal_slot :: acc) rest
in
aux [] tracked_slots
in
Some {attestation_lag; number_of_pages; tracked_slots}
| _ -> None
in
let open Monad.Syntax in
match dal_params with
| None -> stop_evaluating false
| Some dal_params ->
let* () = Dal_parameters.set dal_params in
Status.set Waiting_for_input_message
let remove_prefix prefix input input_len =
let prefix_len = String.length prefix in
if
Compare.Int.(input_len > prefix_len)
&& String.(equal (sub input 0 prefix_len) prefix)
then Some (String.sub input prefix_len (input_len - prefix_len))
else None
let evaluate =
let open Monad.Syntax in
let* i = Code.pop in
match i with
| None -> stop_evaluating true
| Some (IPush x) -> Stack.push x
| Some (IStore x) -> (
let len = String.length x in
match remove_prefix "hash:" x len with
| Some hash -> evaluate_preimage_request hash
| None -> (
match remove_prefix "dal:" x len with
| Some dal_directive -> evaluate_dal_parameters dal_directive
| None -> (
let* v = Stack.top in
match v with
| None -> stop_evaluating false
| Some v -> (
match identifies_target_contract x with
| Some contract_entrypoint -> output contract_entrypoint v
| None -> Vars.set x v))))
| Some IAdd -> (
let* v = Stack.pop in
match v with
| None -> stop_evaluating false
| Some x -> (
let* v = Stack.pop in
match v with
| None -> stop_evaluating false
| Some y -> Stack.push (x + y)))
let reboot =
let open Monad.Syntax in
let* () = Status.set Waiting_for_input_message in
let* () = Stack.clear in
let* () = Code.clear in
return ()
let eval_step =
let open Monad.Syntax in
let* x = is_stuck in
match x with
| Some _ -> reboot
| None -> (
let* status = Status.get in
match status with
| Halted -> boot
| Waiting_for_input_message | Waiting_for_reveal _ -> (
let* msg = Next_message.get in
match msg with
| None -> internal_error "An input state was not provided an input."
| Some _ -> start_parsing)
| Parsing -> parse
| Evaluating -> evaluate)
let eval state = state_of (ticked eval_step) state
let step_transition ~is_reveal_enabled input_given state =
let open Lwt_syntax in
let* request = is_input_state ~is_reveal_enabled state in
let error msg = state_of (internal_error msg) state in
let* state =
match (request, input_given) with
| PS.No_input_required, None -> eval state
| PS.No_input_required, Some _ ->
error "Invalid set_input: expecting no input message but got one."
| (PS.Initial | PS.First_after _), Some (PS.Inbox_message _ as input)
| ( PS.Needs_reveal (Reveal_raw_data _),
Some (PS.Reveal (Raw_data _) as input) )
| PS.Needs_reveal Reveal_metadata, Some (PS.Reveal (Metadata _) as input)
| ( PS.Needs_reveal (PS.Request_dal_page _),
Some (PS.Reveal (Dal_page _) as input) ) ->
set_input input state
| PS.Needs_reveal Reveal_dal_parameters, _ ->
error
"Invalid set_input: revealing DAL parameters is not supported in \
the arith PVM."
| (PS.Initial | PS.First_after _), _ ->
error "Invalid set_input: expecting inbox message, got a reveal."
| PS.Needs_reveal (Reveal_raw_data _hash), _ ->
error
"Invalid set_input: expecting a raw data reveal, got an inbox \
message or a reveal metadata."
| PS.Needs_reveal Reveal_metadata, _ ->
error
"Invalid set_input: expecting a metadata reveal, got an inbox \
message or a raw data reveal."
| PS.Needs_reveal (PS.Request_dal_page _), _ ->
error
"Invalid set_input: expecting a dal page reveal, got an inbox \
message or a raw data reveal."
in
return (state, request)
type error += Arith_proof_verification_failed
let verify_proof ~is_reveal_enabled input_given proof =
let open Lwt_result_syntax in
let*! result =
Context.verify_proof
proof
(step_transition ~is_reveal_enabled input_given)
in
match result with
| None -> tzfail Arith_proof_verification_failed
| Some (_state, request) -> return request
let produce_proof context ~is_reveal_enabled input_given state =
let open Lwt_result_syntax in
let*! result =
Context.produce_proof
context
state
(step_transition ~is_reveal_enabled input_given)
in
match result with
| Some (tree_proof, _requested) -> return tree_proof
| None -> tzfail Arith_proof_production_failed
type output_proof = {
output_proof : Context.proof;
output_proof_state : hash;
output_proof_output : PS.output;
}
let output_proof_encoding =
let open Data_encoding in
conv
(fun {output_proof; output_proof_state; output_proof_output} ->
(output_proof, output_proof_state, output_proof_output))
(fun (output_proof, output_proof_state, output_proof_output) ->
{output_proof; output_proof_state; output_proof_output})
(obj3
(req "output_proof" Context.proof_encoding)
(req "output_proof_state" State_hash.encoding)
(req "output_proof_output" PS.output_encoding))
let output_of_output_proof s = s.output_proof_output
let state_of_output_proof s = s.output_proof_state
let output_key message_index = Z.to_string message_index
let get_output ~outbox_level ~message_index ~message state =
let open Lwt_syntax in
let* _state, output = run (Output.get (output_key message_index)) state in
let output =
let output = Option.join output in
Option.bind
output
(fun
{
outbox_level = found_outbox_level;
message = found_message;
message_index = _;
}
->
let found_message_encoded =
Data_encoding.Binary.to_string_exn
Sc_rollup_outbox_message_repr.encoding
found_message
in
let given_message_encoded =
Data_encoding.Binary.to_string_exn
Sc_rollup_outbox_message_repr.encoding
message
in
if
Raw_level_repr.equal outbox_level found_outbox_level
&& Compare.String.equal found_message_encoded given_message_encoded
then Some message
else None)
in
return (state, output)
let verify_output_proof p =
let open Lwt_result_syntax in
let outbox_level = p.output_proof_output.outbox_level in
let message_index = p.output_proof_output.message_index in
let message = p.output_proof_output.message in
let transition = get_output ~outbox_level ~message_index ~message in
let*! result = Context.verify_proof p.output_proof transition in
match result with
| Some (_state, Some message) ->
return Sc_rollup_PVM_sig.{outbox_level; message_index; message}
| _ -> tzfail Arith_output_proof_production_failed
let produce_output_proof context state output_proof_output =
let open Lwt_result_syntax in
let outbox_level = output_proof_output.Sc_rollup_PVM_sig.outbox_level in
let message_index = output_proof_output.message_index in
let message = output_proof_output.message in
let*! result =
Context.produce_proof context state
@@ get_output ~outbox_level ~message_index ~message
in
match result with
| Some (output_proof, Some message) ->
let*! output_proof_state = state_hash state in
return
{
output_proof;
output_proof_state;
output_proof_output = {outbox_level; message_index; message};
}
| _ -> fail Arith_output_proof_production_failed
module Internal_for_tests = struct
let insert_failure state =
let open Lwt_syntax in
let add n = Tree.add state ["failures"; string_of_int n] Bytes.empty in
let* n = Tree.length state ["failures"] in
add n
end
end
module Protocol_implementation = Make (struct
module Tree = struct
include Context.Tree
type tree = Context.tree
type t = Context.t
type key = string list
type value = bytes
end
type tree = Context.tree
type proof = Context.Proof.tree Context.Proof.t
let verify_proof p f =
let open Lwt_option_syntax in
let*? () = Result.to_option (Context_binary_proof.check_is_binary p) in
Lwt.map Result.to_option (Context.verify_tree_proof p f)
let produce_proof _context _state _f =
Lwt.return_none
let kinded_hash_to_state_hash = function
| `Value hash | `Node hash -> State_hash.context_hash_to_state_hash hash
let proof_before proof = kinded_hash_to_state_hash proof.Context.Proof.before
let proof_after proof = kinded_hash_to_state_hash proof.Context.Proof.after
let proof_encoding = Context.Proof_encoding.V2.Tree2.tree_proof_encoding
end)