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Attempt to fix ERC20

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This commit is contained in:
ernestognw
2023-08-11 19:53:30 -06:00
parent 9cf770354e
commit 5612f260d6
36 changed files with 252 additions and 59 deletions
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2
certora/diff/access_AccessControl.sol.patch
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@ -1,5 +1,5 @@
--- access/AccessControl.sol 2023-08-10 22:02:18
+++ access/AccessControl.sol 2023-08-10 22:11:07
+++ access/AccessControl.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol)

2
certora/diff/access_IAccessControl.sol.patch
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@ -1,5 +1,5 @@
--- access/IAccessControl.sol 2023-08-10 22:02:20
+++ access/IAccessControl.sol 2023-08-10 22:11:07
+++ access/IAccessControl.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

2
certora/diff/access_Ownable.sol.patch
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@ -1,5 +1,5 @@
--- access/Ownable.sol 2023-08-09 11:45:05
+++ access/Ownable.sol 2023-08-11 11:37:19
+++ access/Ownable.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

2
certora/diff/access_Ownable2Step.sol.patch
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@ -1,5 +1,5 @@
--- access/Ownable2Step.sol 2023-08-09 11:45:05
+++ access/Ownable2Step.sol 2023-08-11 11:37:27
+++ access/Ownable2Step.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)

2
certora/diff/access_extensions_AccessControlDefaultAdminRules.sol.patch
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@ -1,5 +1,5 @@
--- access/extensions/AccessControlDefaultAdminRules.sol 2023-08-09 11:45:05
+++ access/extensions/AccessControlDefaultAdminRules.sol 2023-08-10 22:18:05
+++ access/extensions/AccessControlDefaultAdminRules.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControlDefaultAdminRules.sol)

2
certora/diff/access_extensions_IAccessControlDefaultAdminRules.sol.patch
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@ -1,5 +1,5 @@
--- access/extensions/IAccessControlDefaultAdminRules.sol 2023-08-09 11:45:05
+++ access/extensions/IAccessControlDefaultAdminRules.sol 2023-08-10 22:18:08
+++ access/extensions/IAccessControlDefaultAdminRules.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/IAccessControlDefaultAdminRules.sol)

11
certora/diff/interfaces_IERC3156FlashBorrower.sol.patch Normal file
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@ -0,0 +1,11 @@
--- interfaces/IERC3156FlashBorrower.sol 2023-08-09 11:45:05
+++ interfaces/IERC3156FlashBorrower.sol 2023-08-11 13:36:59
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC3156FlashBorrower.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
/**
* @dev Interface of the ERC3156 FlashBorrower, as defined in

11
certora/diff/interfaces_IERC3156FlashLender.sol.patch Normal file
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@ -0,0 +1,11 @@
--- interfaces/IERC3156FlashLender.sol 2023-08-09 11:45:05
+++ interfaces/IERC3156FlashLender.sol 2023-08-11 13:37:04
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC3156FlashLender.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {IERC3156FlashBorrower} from "./IERC3156FlashBorrower.sol";

11
certora/diff/interfaces_IERC5267.sol.patch Normal file
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@ -0,0 +1,11 @@
--- interfaces/IERC5267.sol 2023-08-09 11:45:05
+++ interfaces/IERC5267.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5267.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
interface IERC5267 {
/**

2
certora/diff/interfaces_IERC5313.sol.patch
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@ -1,5 +1,5 @@
--- interfaces/IERC5313.sol 2023-08-09 11:45:05
+++ interfaces/IERC5313.sol 2023-08-10 22:18:26
+++ interfaces/IERC5313.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC5313.sol)

9
certora/diff/interfaces_draft-IERC6093.sol.patch Normal file
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@ -0,0 +1,9 @@
--- interfaces/draft-IERC6093.sol 2023-08-09 11:45:05
+++ interfaces/draft-IERC6093.sol 2023-08-11 12:22:17
@@ -1,5 +1,5 @@
// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
/**
* @dev Standard ERC20 Errors

2
certora/diff/security_Pausable.sol.patch
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@ -1,5 +1,5 @@
--- security/Pausable.sol 2023-08-10 21:54:54
+++ security/Pausable.sol 2023-08-10 22:11:07
+++ security/Pausable.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

11
certora/diff/token_ERC20_ERC20.sol.patch Normal file
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@ -0,0 +1,11 @@
--- token/ERC20/ERC20.sol 2023-08-09 11:45:05
+++ token/ERC20/ERC20.sol 2023-08-11 13:37:08
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";

11
certora/diff/token_ERC20_IERC20.sol.patch Normal file
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@ -0,0 +1,11 @@
--- token/ERC20/IERC20.sol 2023-08-09 11:45:05
+++ token/ERC20/IERC20.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.

11
certora/diff/token_ERC20_extensions_ERC20FlashMint.sol.patch Normal file
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@ -0,0 +1,11 @@
--- token/ERC20/extensions/ERC20FlashMint.sol 2023-08-09 11:45:05
+++ token/ERC20/extensions/ERC20FlashMint.sol 2023-08-11 13:36:55
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/extensions/ERC20FlashMint.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {IERC3156FlashBorrower} from "../../../interfaces/IERC3156FlashBorrower.sol";
import {IERC3156FlashLender} from "../../../interfaces/IERC3156FlashLender.sol";

11
certora/diff/token_ERC20_extensions_ERC20Permit.sol.patch Normal file
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@ -0,0 +1,11 @@
--- token/ERC20/extensions/ERC20Permit.sol 2023-08-09 11:45:05
+++ token/ERC20/extensions/ERC20Permit.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/ERC20Permit.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {IERC20Permit} from "./IERC20Permit.sol";
import {ERC20} from "../ERC20.sol";

11
certora/diff/token_ERC20_extensions_IERC20Metadata.sol.patch Normal file
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@ -0,0 +1,11 @@
--- token/ERC20/extensions/IERC20Metadata.sol 2023-08-09 11:45:05
+++ token/ERC20/extensions/IERC20Metadata.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {IERC20} from "../IERC20.sol";

11
certora/diff/token_ERC20_extensions_IERC20Permit.sol.patch Normal file
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@ -0,0 +1,11 @@
--- token/ERC20/extensions/IERC20Permit.sol 2023-08-11 12:19:57
+++ token/ERC20/extensions/IERC20Permit.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in

2
certora/diff/token_ERC721_ERC721.sol.patch
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@ -1,5 +1,5 @@
--- token/ERC721/ERC721.sol 2023-08-10 16:45:36
+++ token/ERC721/ERC721.sol 2023-08-10 22:11:07
+++ token/ERC721/ERC721.sol 2023-08-11 12:22:17
@@ -208,6 +208,11 @@
return _owners[tokenId];
}

2
certora/diff/utils_Context.sol.patch
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@ -1,5 +1,5 @@
--- utils/Context.sol 2023-08-10 21:54:56
+++ utils/Context.sol 2023-08-10 22:11:07
+++ utils/Context.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

9
certora/diff/utils_Nonces.sol.patch Normal file
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@ -0,0 +1,9 @@
--- utils/Nonces.sol 2023-08-09 11:45:05
+++ utils/Nonces.sol 2023-08-11 12:22:17
@@ -1,5 +1,5 @@
// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
/**
* @dev Provides tracking nonces for addresses. Nonces will only increment.

11
certora/diff/utils_ShortStrings.sol.patch Normal file
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@ -0,0 +1,11 @@
--- utils/ShortStrings.sol 2023-08-09 11:45:05
+++ utils/ShortStrings.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/ShortStrings.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {StorageSlot} from "./StorageSlot.sol";

11
certora/diff/utils_StorageSlot.sol.patch Normal file
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@ -0,0 +1,11 @@
--- utils/StorageSlot.sol 2023-08-09 11:45:05
+++ utils/StorageSlot.sol 2023-08-11 12:22:17
@@ -2,7 +2,7 @@
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
/**
* @dev Library for reading and writing primitive types to specific storage slots.

11
certora/diff/utils_Strings.sol.patch Normal file
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@ -0,0 +1,11 @@
--- utils/Strings.sol 2023-08-09 11:45:05
+++ utils/Strings.sol 2023-08-11 12:22:44
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";

11
certora/diff/utils_cryptography_ECDSA.sol.patch Normal file
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@ -0,0 +1,11 @@
--- utils/cryptography/ECDSA.sol 2023-08-09 11:45:05
+++ utils/cryptography/ECDSA.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.

11
certora/diff/utils_cryptography_EIP712.sol.patch Normal file
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@ -0,0 +1,11 @@
--- utils/cryptography/EIP712.sol 2023-08-09 11:45:05
+++ utils/cryptography/EIP712.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/EIP712.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {MessageHashUtils} from "./MessageHashUtils.sol";
import {ShortStrings, ShortString} from "../ShortStrings.sol";

10
certora/diff/utils_cryptography_MessageHashUtils.sol.patch Normal file
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@ -0,0 +1,10 @@
--- utils/cryptography/MessageHashUtils.sol 2023-08-09 11:45:05
+++ utils/cryptography/MessageHashUtils.sol 2023-08-11 12:22:17
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
import {Strings} from "../Strings.sol";

2
certora/diff/utils_introspection_ERC165.sol.patch
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@ -1,5 +1,5 @@
--- utils/introspection/ERC165.sol 2023-08-10 22:02:24
+++ utils/introspection/ERC165.sol 2023-08-10 22:11:07
+++ utils/introspection/ERC165.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

2
certora/diff/utils_introspection_IERC165.sol.patch
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@ -1,5 +1,5 @@
--- utils/introspection/IERC165.sol 2023-08-09 11:45:05
+++ utils/introspection/IERC165.sol 2023-08-10 22:11:07
+++ utils/introspection/IERC165.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

2
certora/diff/utils_math_Math.sol.patch
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@ -1,5 +1,5 @@
--- utils/math/Math.sol 2023-08-09 11:45:05
+++ utils/math/Math.sol 2023-08-10 22:18:22
+++ utils/math/Math.sol 2023-08-11 12:22:17
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

2
certora/diff/utils_math_SafeCast.sol.patch
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@ -1,5 +1,5 @@
--- utils/math/SafeCast.sol 2023-08-09 11:45:05
+++ utils/math/SafeCast.sol 2023-08-10 22:18:17
+++ utils/math/SafeCast.sol 2023-08-11 12:22:17
@@ -2,7 +2,7 @@
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

11
certora/diff/utils_math_SignedMath.sol.patch Normal file
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@ -0,0 +1,11 @@
--- utils/math/SignedMath.sol 2023-08-09 11:45:05
+++ utils/math/SignedMath.sol 2023-08-11 12:22:51
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)
-pragma solidity ^0.8.20;
+pragma solidity ^0.8.19;
/**
* @dev Standard signed math utilities missing in the Solidity language.

2
certora/diff/utils_structs_DoubleEndedQueue.sol.patch
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@ -1,5 +1,5 @@
--- utils/structs/DoubleEndedQueue.sol 2023-08-09 11:45:05
+++ utils/structs/DoubleEndedQueue.sol 2023-08-10 23:15:17
+++ utils/structs/DoubleEndedQueue.sol 2023-08-11 12:22:17
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/DoubleEndedQueue.sol)

4
certora/harnesses/ERC20PermitHarness.sol
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@ -1,8 +1,8 @@
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
pragma solidity ^0.8.19;
import "../patched/token/ERC20/extensions/ERC20Permit.sol";
import {ERC20Permit, ERC20} from "../patched/token/ERC20/extensions/ERC20Permit.sol";
contract ERC20PermitHarness is ERC20Permit {
constructor(string memory name, string memory symbol) ERC20(name, symbol) ERC20Permit(name) {}

66
certora/specs/ERC20.spec
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@ -1,15 +1,15 @@
import "helpers/helpers.spec"
import "methods/IERC20.spec"
import "methods/IERC2612.spec"
import "helpers/helpers.spec";
import "methods/IERC20.spec";
import "methods/IERC2612.spec";
methods {
// non standard ERC20 functions
increaseAllowance(address,uint256) returns (bool)
decreaseAllowance(address,uint256) returns (bool)
function increaseAllowance(address,uint256) external returns (bool);
function decreaseAllowance(address,uint256) external returns (bool);
// exposed for FV
mint(address,uint256)
burn(address,uint256)
function mint(address,uint256) external;
function burn(address,uint256) external;
}
/*
@ -17,7 +17,7 @@ methods {
│ Ghost & hooks: sum of all balances │
└─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
*/
ghost sumOfBalances() returns uint256 {
ghost sumOfBalances() returns mathint {
init_state axiom sumOfBalances() == 0;
}
@ -31,7 +31,7 @@ hook Sstore _balances[KEY address addr] uint256 newValue (uint256 oldValue) STOR
└─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
*/
invariant totalSupplyIsSumOfBalances()
totalSupply() == sumOfBalances()
to_mathint(totalSupply()) == sumOfBalances();
/*
┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
@ -39,7 +39,7 @@ invariant totalSupplyIsSumOfBalances()
└─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
*/
invariant zeroAddressNoBalance()
balanceOf(0) == 0
balanceOf(0) == 0;
/*
┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
@ -56,8 +56,8 @@ rule noChangeTotalSupply(env e) {
f(e, args);
uint256 totalSupplyAfter = totalSupply();
assert totalSupplyAfter > totalSupplyBefore => f.selector == mint(address,uint256).selector;
assert totalSupplyAfter < totalSupplyBefore => f.selector == burn(address,uint256).selector;
assert totalSupplyAfter > totalSupplyBefore => f.selector == sig:mint(address,uint256).selector;
assert totalSupplyAfter < totalSupplyBefore => f.selector == sig:burn(address,uint256).selector;
}
/*
@ -80,9 +80,9 @@ rule onlyAuthorizedCanTransfer(env e) {
assert (
balanceAfter < balanceBefore
) => (
f.selector == burn(address,uint256).selector ||
f.selector == sig:burn(address,uint256).selector ||
e.msg.sender == account ||
balanceBefore - balanceAfter <= allowanceBefore
balanceBefore - balanceAfter <= to_mathint(allowanceBefore)
);
}
@ -106,18 +106,18 @@ rule onlyHolderOfSpenderCanChangeAllowance(env e) {
assert (
allowanceAfter > allowanceBefore
) => (
(f.selector == approve(address,uint256).selector && e.msg.sender == holder) ||
(f.selector == increaseAllowance(address,uint256).selector && e.msg.sender == holder) ||
(f.selector == permit(address,address,uint256,uint256,uint8,bytes32,bytes32).selector)
(f.selector == sig:approve(address,uint256).selector && e.msg.sender == holder) ||
(f.selector == sig:increaseAllowance(address,uint256).selector && e.msg.sender == holder) ||
(f.selector == sig:permit(address,address,uint256,uint256,uint8,bytes32,bytes32).selector)
);
assert (
allowanceAfter < allowanceBefore
) => (
(f.selector == transferFrom(address,address,uint256).selector && e.msg.sender == spender) ||
(f.selector == approve(address,uint256).selector && e.msg.sender == holder ) ||
(f.selector == decreaseAllowance(address,uint256).selector && e.msg.sender == holder ) ||
(f.selector == permit(address,address,uint256,uint256,uint8,bytes32,bytes32).selector)
(f.selector == sig:transferFrom(address,address,uint256).selector && e.msg.sender == spender) ||
(f.selector == sig:approve(address,uint256).selector && e.msg.sender == holder ) ||
(f.selector == sig:decreaseAllowance(address,uint256).selector && e.msg.sender == holder ) ||
(f.selector == sig:permit(address,address,uint256,uint256,uint8,bytes32,bytes32).selector)
);
}
@ -147,8 +147,8 @@ rule mint(env e) {
assert to == 0 || totalSupplyBefore + amount > max_uint256;
} else {
// updates balance and totalSupply
assert balanceOf(to) == toBalanceBefore + amount;
assert totalSupply() == totalSupplyBefore + amount;
assert to_mathint(balanceOf(to)) == toBalanceBefore + amount;
assert to_mathint(totalSupply()) == totalSupplyBefore + amount;
// no other balance is modified
assert balanceOf(other) != otherBalanceBefore => other == to;
@ -181,8 +181,8 @@ rule burn(env e) {
assert from == 0 || fromBalanceBefore < amount;
} else {
// updates balance and totalSupply
assert balanceOf(from) == fromBalanceBefore - amount;
assert totalSupply() == totalSupplyBefore - amount;
assert to_mathint(balanceOf(from)) == fromBalanceBefore - amount;
assert to_mathint(totalSupply()) == totalSupplyBefore - amount;
// no other balance is modified
assert balanceOf(other) != otherBalanceBefore => other == from;
@ -216,8 +216,8 @@ rule transfer(env e) {
assert holder == 0 || recipient == 0 || amount > holderBalanceBefore;
} else {
// balances of holder and recipient are updated
assert balanceOf(holder) == holderBalanceBefore - (holder == recipient ? 0 : amount);
assert balanceOf(recipient) == recipientBalanceBefore + (holder == recipient ? 0 : amount);
assert to_mathint(balanceOf(holder)) == holderBalanceBefore - (holder == recipient ? 0 : amount);
assert to_mathint(balanceOf(recipient)) == recipientBalanceBefore + (holder == recipient ? 0 : amount);
// no other balance is modified
assert balanceOf(other) != otherBalanceBefore => (other == holder || other == recipient);
@ -254,11 +254,11 @@ rule transferFrom(env e) {
} else {
// allowance is valid & updated
assert allowanceBefore >= amount;
assert allowance(holder, spender) == (allowanceBefore == max_uint256 ? to_uint256(max_uint256) : allowanceBefore - amount);
assert to_mathint(allowance(holder, spender)) == (allowanceBefore == max_uint256 ? max_uint256 : allowanceBefore - amount);
// balances of holder and recipient are updated
assert balanceOf(holder) == holderBalanceBefore - (holder == recipient ? 0 : amount);
assert balanceOf(recipient) == recipientBalanceBefore + (holder == recipient ? 0 : amount);
assert to_mathint(balanceOf(holder)) == holderBalanceBefore - (holder == recipient ? 0 : amount);
assert to_mathint(balanceOf(recipient)) == recipientBalanceBefore + (holder == recipient ? 0 : amount);
// no other balance is modified
assert balanceOf(other) != otherBalanceBefore => (other == holder || other == recipient);
@ -323,7 +323,7 @@ rule increaseAllowance(env e) {
assert holder == 0 || spender == 0 || allowanceBefore + amount > max_uint256;
} else {
// allowance is updated
assert allowance(holder, spender) == allowanceBefore + amount;
assert to_mathint(allowance(holder, spender)) == allowanceBefore + amount;
// other allowances are untouched
assert allowance(otherHolder, otherSpender) != otherAllowanceBefore => (otherHolder == holder && otherSpender == spender);
@ -356,7 +356,7 @@ rule decreaseAllowance(env e) {
assert holder == 0 || spender == 0 || allowanceBefore < amount;
} else {
// allowance is updated
assert allowance(holder, spender) == allowanceBefore - amount;
assert to_mathint(allowance(holder, spender)) == allowanceBefore - amount;
// other allowances are untouched
assert allowance(otherHolder, otherSpender) != otherAllowanceBefore => (otherHolder == holder && otherSpender == spender);
@ -402,7 +402,7 @@ rule permit(env e) {
} else {
// allowance and nonce are updated
assert allowance(holder, spender) == amount;
assert nonces(holder) == nonceBefore + 1;
assert to_mathint(nonces(holder)) == nonceBefore + 1;
// deadline was respected
assert deadline >= e.block.timestamp;

18
certora/specs/methods/IERC20.spec
View File

@ -1,11 +1,11 @@
methods {
name() returns (string) envfree => DISPATCHER(true)
symbol() returns (string) envfree => DISPATCHER(true)
decimals() returns (uint8) envfree => DISPATCHER(true)
totalSupply() returns (uint256) envfree => DISPATCHER(true)
balanceOf(address) returns (uint256) envfree => DISPATCHER(true)
allowance(address,address) returns (uint256) envfree => DISPATCHER(true)
approve(address,uint256) returns (bool) => DISPATCHER(true)
transfer(address,uint256) returns (bool) => DISPATCHER(true)
transferFrom(address,address,uint256) returns (bool) => DISPATCHER(true)
function name() external returns (string) envfree;
function symbol() external returns (string) envfree;
function decimals() external returns (uint8) envfree;
function totalSupply() external returns (uint256) envfree;
function balanceOf(address) external returns (uint256) envfree;
function allowance(address,address) external returns (uint256) envfree;
function approve(address,uint256) external returns (bool);
function transfer(address,uint256) external returns (bool);
function transferFrom(address,address,uint256) external returns (bool);
}