https://gitlab.com/nomadic-labs/mi-cho-coq
Tip revision: 08f3bd63c6b05940724f15f049f65d242dcaf8ba authored by Arvid Jakobsson on 23 October 2019, 08:54:20 UTC
Merge branch 'arvid@fix-clean-extraction' into 'master'
Merge branch 'arvid@fix-clean-extraction' into 'master'
Tip revision: 08f3bd6
return_to_sender.v
(* Open Source License *)
(* Copyright (c) 2019 Nomadic Labs. <contact@nomadic-labs.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. *)
(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *)
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *)
(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *)
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(* DEALINGS IN THE SOFTWARE. *)
Require Import Michocoq.macros.
Import syntax.
Import comparable.
Require Import ZArith.
Require Import semantics.
Require Import util.
Import error.
Require List.
Definition parameter_ty := unit.
Definition storage_ty := unit.
Module ST : (SelfType with Definition self_type := parameter_ty).
Definition self_type := parameter_ty.
End ST.
Module return_to_sender(C:ContractContext)(E:Env ST C).
Module semantics := Semantics ST C E. Import semantics.
Definition return_to_sender : full_contract _ ST.self_type storage_ty :=
(
CDR ;;
NIL operation ;;
AMOUNT;;
PUSH mutez (0 ~mutez);;
IFCMPEQ NOOP
(
SOURCE ;;
CONTRACT unit ;;
ASSERT_SOME ;;
AMOUNT ;;
UNIT ;;
TRANSFER_TOKENS ;;
CONS
);;
PAIR
).
Lemma eqb_eq a c1 c2 :
BinInt.Z.eqb (comparison_to_int (compare a c1 c2)) Z0 = true <->
c1 = c2.
Proof.
rewrite BinInt.Z.eqb_eq.
rewrite comparison_to_int_Eq.
apply comparable.compare_eq_iff.
Qed.
Lemma eqb_neq a c1 c2 :
BinInt.Z.eqb (comparison_to_int (compare a c1 c2)) Z0 = false <->
c1 <> c2.
Proof.
split.
- intros Hf He.
rewrite <- eqb_eq in He.
congruence.
- intro Hneq.
rewrite <- eqb_eq in Hneq.
destruct ((comparison_to_int (compare a c1 c2) =? 0)%Z); congruence.
Qed.
Lemma return_to_sender_correct :
forall (ops : data (list operation)) (fuel : Datatypes.nat),
fuel >= 42 ->
eval env return_to_sender fuel ((tt, tt), tt) = Return _ ((ops, tt), tt)
<->
(amount env = (0 ~Mutez) /\ ops = nil) \/
(amount env <> (0 ~Mutez) /\
exists ctr, contract_ env unit (source env) = Some ctr /\
ops = ((transfer_tokens env unit tt (amount env) ctr) :: nil)%list).
Proof.
intros ops fuel Hfuel.
rewrite return_precond.
unfold eval.
rewrite eval_precond_correct.
unfold ">=" in Hfuel.
do 8 (more_fuel ; simpl).
fold (simple_compare mutez).
fold (compare mutez).
case_eq ((comparison_to_int (compare mutez (0 ~Mutez) (amount env)) =? 0)%Z).
- (* true *)
intro Heq.
rewrite eqb_eq in Heq.
do 1 (more_fuel ; simpl).
split.
+ intro Hops.
injection Hops.
intro; subst ops.
intuition.
+ intros [(Hl, Hops)|(Hr, _)].
* simpl.
subst; reflexivity.
* symmetry in Heq.
contradiction.
- intro Hneq.
rewrite eqb_neq in Hneq.
do 7 (more_fuel ; simpl).
destruct (contract_ env unit (source env)).
+ (* Some *)
split.
* intro H ; right; split.
-- congruence.
-- eexists ; intuition ; injection H.
symmetry; assumption.
* intros [(Habs, _)| (_, (ctr, (He, Hops)))].
-- congruence.
-- injection He; intro; subst d; subst ops; reflexivity.
+ (* None *)
simpl. split.
* intro H; inversion H.
* intros [(Habs, _)|(ctr, (He, (Hops, _)))].
-- congruence.
-- discriminate.
Qed.
End return_to_sender.