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Erc721.v
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Require Import FullSpecificationSmartContracts.Common.
Definition InitInput : Set :=
string * string.
Definition InitOutput : Set :=
unit.
Module State.
Record t : Set := {
name : string;
symbol : string;
}.
End State.
(** The commands representing the entrypoints of our smart contract, with the type of their
output. *)
Module Command.
Inductive t {init_output : InitOutput} : Set -> Set :=
| Update (to : User) (token_id : TokenKind) : t unit.
Arguments t : clear implicits.
End Command.
Definition smart_contract :
SmartContract.t
InitInput
InitOutput
Command.t
State.t :=
{|
(* The constructor function *)
SmartContract.init _sender '(name, symbol) :=
let state := {|
State.name := name;
State.symbol := symbol;
|} in
M.Pure (Some (tt, state));
SmartContract.call A token_kind sender command state :=
match command in Command.t _ A return M.t (option (A * _)) with
(* The "update" entrypoint *)
| Command.Update to token_id =>
let! from := M.MakeAction (Action.GetUniqueTokenKindOwner token_id) in
match from with
| Some from =>
let! is_eq := M.MakeAction (Action.UserEq from sender) in
if is_eq then
let! is_success := M.MakeAction (Action.Transfer token_id from to TokenQuantityOne) in
if is_success then
M.Pure (Some (tt, state))
else
M.Pure None
else
M.Pure None
| None =>
M.Pure None
end
end;
|}.
Module IsSafe.
Lemma is_safe : NoStealing.InSmartContract.t smart_contract.
Proof.
constructor; intros; cbn.
{ (* init *)
destruct init_input as [name symbol].
unfold NoStealing.InRun.t; cbn.
apply ActionTree.Forall.Pure.
}
{ (* call *)
destruct command.
{ (* Update *)
unfold NoStealing.InRun.t; cbn.
destruct Primitives.get_unique_token_kind_owner; cbn.
{ destruct Primitives.user_eq eqn:?; cbn.
{ destruct Primitives.transfer; cbn.
{ apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
trivial.
}
apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
trivial.
}
apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
apply Primitives.user_eq_is_valid.
trivial.
}
apply ActionTree.Forall.Pure.
}
{ apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
trivial.
}
apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
trivial.
}
apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
apply Primitives.user_eq_is_valid.
trivial.
}
apply ActionTree.Forall.Pure.
}
}
{ apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
trivial.
}
apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
trivial.
}
apply ActionTree.Forall.Pure.
}
}
{ apply ActionTree.Forall.Let. {
apply ActionTree.Forall.MakeAction.
cbn.
trivial.
}
apply ActionTree.Forall.Pure.
}
}
}
Qed.
End IsSafe.