pragma solidity ^0.8.4;

import {MockERC20} from "./utils/mocks/MockERC20.sol";

import {MockERC20LikeUSDT} from "./utils/mocks/MockERC20LikeUSDT.sol";

import {MockETHRecipient} from "./utils/mocks/MockETHRecipient.sol";

import {RevertingToken} from "./utils/weird-tokens/RevertingToken.sol";

import {ReturnsTwoToken} from "./utils/weird-tokens/ReturnsTwoToken.sol";

import {ReturnsFalseToken} from "./utils/weird-tokens/ReturnsFalseToken.sol";

import {MissingReturnToken} from "./utils/weird-tokens/MissingReturnToken.sol";

import {ReturnsTooMuchToken} from "./utils/weird-tokens/ReturnsTooMuchToken.sol";

import {ReturnsRawBytesToken} from "./utils/weird-tokens/ReturnsRawBytesToken.sol";

import {ReturnsTooLittleToken} from "./utils/weird-tokens/ReturnsTooLittleToken.sol";

import "./utils/SoladyTest.sol";

import {ERC20} from "../src/tokens/ERC20.sol";

import {SafeTransferLib} from "../src/utils/SafeTransferLib.sol";

interface IPermit2 {

struct PermitDetails {

address token;

// By right, this is uint160, but we use uint256 to test the overflow errors.

uint256 amount;

uint48 expiration;

uint48 nonce;

}

struct PermitSingle {

PermitDetails details;

address spender;

uint256 sigDeadline;

}

function allowance(address owner, address token, address spender)

external

view

returns (uint160 amount, uint48 expiration, uint48 nonce);

}

contract SafeTransferLibTest is SoladyTest {

uint256 internal constant _SUCCESS = 1;

uint256 internal constant _REVERTS_WITH_SELECTOR = 2;

uint256 internal constant _REVERTS_WITH_ANY = 3;

RevertingToken reverting;

ReturnsTwoToken returnsTwo;

ReturnsFalseToken returnsFalse;

MissingReturnToken missingReturn;

ReturnsTooMuchToken returnsTooMuch;

ReturnsRawBytesToken returnsRawBytes;

ReturnsTooLittleToken returnsTooLittle;

MockERC20 erc20;

address internal constant _DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F;

address internal constant _WETH9 = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;

address internal constant _PERMIT2 = 0x000000000022D473030F116dDEE9F6B43aC78BA3;

bytes32 public constant _PERMIT_DETAILS_TYPEHASH =

keccak256("PermitDetails(address token,uint160 amount,uint48 expiration,uint48 nonce)");

bytes32 public constant _PERMIT_SINGLE_TYPEHASH = keccak256(

"PermitSingle(PermitDetails details,address spender,uint256 sigDeadline)PermitDetails(address token,uint160 amount,uint48 expiration,uint48 nonce)"

);

bytes32 internal constant _DAI_PERMIT_TYPEHASH = keccak256(

"Permit(address holder,address spender,uint256 nonce,uint256 expiry,bool allowed)"

);

bytes32 internal constant _PERMIT_TYPEHASH = keccak256(

"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"

);

function setUp() public {

vm.chainId(1);

reverting = new RevertingToken();

returnsTwo = new ReturnsTwoToken();

returnsFalse = new ReturnsFalseToken();

missingReturn = new MissingReturnToken();

returnsTooMuch = new ReturnsTooMuchToken();

returnsRawBytes = new ReturnsRawBytesToken();

returnsTooLittle = new ReturnsTooLittleToken();

erc20 = new MockERC20("StandardToken", "ST", 18);

erc20.mint(address(this), type(uint256).max);

_deployWETH9();

_deployDAI();

_deployPermit2();

}

function _deployWETH9() internal {

bytes memory bytecode =

hex"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";

vm.etch(_WETH9, bytecode);

}

function _deployDAI() internal {

bytes memory bytecode =

hex"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vm.etch(_DAI, bytecode);

vm.store(_DAI, bytes32(uint256(5)), SafeTransferLib.DAI_DOMAIN_SEPARATOR);

}

function _deployPermit2() internal {

bytes memory bytecode =

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vm.etch(_PERMIT2, bytecode);

}

function testSuccessTrick(bool success, uint256 extCodeSize, uint256 returnDataSize) public {

bool expected = success && extCodeSize != 0 && returnDataSize == 0;

bool computed;

/// @solidity memory-safe-assembly

assembly {

computed := lt(or(iszero(extCodeSize), returnDataSize), success)

}

assertEq(computed, expected);

}

function testTransferWithMissingReturn() public {

verifySafeTransfer(address(missingReturn), address(0xBEEF), 1e18, _SUCCESS);

}

function testTransferWithStandardERC20() public {

verifySafeTransfer(address(erc20), address(0xBEEF), 1e18, _SUCCESS);

}

function testTransferWithReturnsTooMuch() public {

verifySafeTransfer(address(returnsTooMuch), address(0xBEEF), 1e18, _SUCCESS);

}

function testTransferWithNonContractReverts() public {

vm.expectRevert(SafeTransferLib.TransferFailed.selector);

this.safeTransfer(address(0xBADBEEF), address(0xBEEF), 1e18);

}

function testTransferFromWithMissingReturn() public {

verifySafeTransferFrom(

address(missingReturn), address(0xFEED), address(0xBEEF), 1e18, _SUCCESS

);

}

function testTransferFromWithStandardERC20() public {

verifySafeTransferFrom(address(erc20), address(0xFEED), address(0xBEEF), 1e18, _SUCCESS);

}

function testTransferFromWithReturnsTooMuch() public {

verifySafeTransferFrom(

address(returnsTooMuch), address(0xFEED), address(0xBEEF), 1e18, _SUCCESS

);

}

function testTransferFromWithNonContractReverts() public {

vm.expectRevert(SafeTransferLib.TransferFromFailed.selector);

this.safeTransferFrom(address(0xBADBEEF), address(0xFEED), address(0xBEEF), 1e18);

}

function safeTransferFrom(address token, address from, address to, uint256 amount) public {

SafeTransferLib.safeTransferFrom(

_brutalized(token), _brutalized(from), _brutalized(to), amount

);

}

function testApproveWithMissingReturn() public {

verifySafeApprove(address(missingReturn), address(0xBEEF), 1e18, _SUCCESS);

}

function testApproveWithStandardERC20() public {

verifySafeApprove(address(erc20), address(0xBEEF), 1e18, _SUCCESS);

}

function testApproveWithReturnsTooMuch() public {

verifySafeApprove(address(returnsTooMuch), address(0xBEEF), 1e18, _SUCCESS);

}

function testApproveWithNonContractReverts() public {

vm.expectRevert(SafeTransferLib.ApproveFailed.selector);

this.safeApprove(address(0xBADBEEF), address(0xBEEF), 1e18);

}

function safeApprove(address token, address to, uint256 amount) public {

SafeTransferLib.safeApprove(token, to, amount);

}

function testApproveWithRetryWithNonContractReverts() public {

vm.expectRevert(SafeTransferLib.ApproveFailed.selector);

this.safeApproveWithRetry(address(0xBADBEEF), address(0xBEEF), 1e18);

}

function safeApproveWithRetry(address token, address to, uint256 amount) public {

SafeTransferLib.safeApproveWithRetry(token, to, amount);

}

function testTransferETH() public {

SafeTransferLib.safeTransferETH(address(0xBEEF), 1e18);

}

function testTransferAllETH() public {

SafeTransferLib.safeTransferAllETH(address(0xBEEF));

}

function testTryTransferETH() public {

MockETHRecipient recipient = new MockETHRecipient(false, false);

bool success = SafeTransferLib.trySafeTransferETH(address(recipient), 1e18, gasleft());

assertTrue(success);

}

function testTryTransferAllETH() public {

MockETHRecipient recipient = new MockETHRecipient(false, false);

bool success = SafeTransferLib.trySafeTransferAllETH(address(recipient), gasleft());

assertTrue(success);

}

function testTryTransferETHWithNoStorageWrites() public {

MockETHRecipient recipient = new MockETHRecipient(true, false);

{

bool success = SafeTransferLib.trySafeTransferETH(

address(recipient), 1e18, SafeTransferLib.GAS_STIPEND_NO_STORAGE_WRITES

);

assertFalse(success);

}

{

uint256 counterBefore = recipient.counter();

bool success = SafeTransferLib.trySafeTransferETH(

address(recipient), 1e18, SafeTransferLib.GAS_STIPEND_NO_GRIEF

);

assertTrue(success);

assertEq(recipient.counter(), counterBefore + 1);

}

{

uint256 counterBefore = recipient.counter();

bool success = SafeTransferLib.trySafeTransferETH(address(recipient), 1e18, gasleft());

assertTrue(success);

assertEq(recipient.counter(), counterBefore + 1);

}

}

function testTryTransferETHWithNoGrief() public {

MockETHRecipient recipient = new MockETHRecipient(false, true);

{

bool success = SafeTransferLib.trySafeTransferETH(

address(recipient), 1e18, SafeTransferLib.GAS_STIPEND_NO_STORAGE_WRITES

);

assertFalse(success);

assertTrue(recipient.garbage() == 0);

}

{

bool success = SafeTransferLib.trySafeTransferETH(

address(recipient), 1e18, SafeTransferLib.GAS_STIPEND_NO_GRIEF

);

assertFalse(success);

assertTrue(recipient.garbage() == 0);

}

{

bool success = SafeTransferLib.trySafeTransferETH(address(recipient), 1e18, gasleft());

assertTrue(success);

assertTrue(recipient.garbage() != 0);

}

}

function testForceTransferETHToGriever(uint256 amount, uint256 randomness) public {

amount = amount % 1000 ether;

uint256 originalBalance = address(this).balance;

vm.deal(address(this), amount * 2);

MockETHRecipient recipient = new MockETHRecipient(false, true);

{

uint256 receipientBalanceBefore = address(recipient).balance;

uint256 senderBalanceBefore = address(this).balance;

uint256 r = uint256(keccak256(abi.encode(randomness))) % 3;

// Send to a griever with a gas stipend. Should not revert.

if (r == 0) {

this.forceSafeTransferETH(

address(recipient), amount, SafeTransferLib.GAS_STIPEND_NO_STORAGE_WRITES

);

} else if (r == 1) {

this.forceSafeTransferETH(

address(recipient), amount, SafeTransferLib.GAS_STIPEND_NO_GRIEF

);

} else {

this.forceSafeTransferETH(address(recipient), amount);

}

assertEq(address(recipient).balance - receipientBalanceBefore, amount);

assertEq(senderBalanceBefore - address(this).balance, amount);

// We use the `SELFDESTRUCT` to send, and thus the `garbage` should NOT be updated.

assertTrue(recipient.garbage() == 0);

}

{

uint256 receipientBalanceBefore = address(recipient).balance;

uint256 senderBalanceBefore = address(this).balance;

// Send more than remaining balance without gas stipend. Should revert.

vm.expectRevert(SafeTransferLib.ETHTransferFailed.selector);

this.forceSafeTransferETH(address(recipient), address(this).balance + 1, gasleft());

assertEq(address(recipient).balance - receipientBalanceBefore, 0);

assertEq(senderBalanceBefore - address(this).balance, 0);

// We did not send anything, and thus the `garbage` should NOT be updated.

assertTrue(recipient.garbage() == 0);

}

{

uint256 receipientBalanceBefore = address(recipient).balance;

uint256 senderBalanceBefore = address(this).balance;

// Send all the remaining balance without gas stipend. Should not revert.

amount = address(this).balance;

this.forceSafeTransferETH(address(recipient), amount, gasleft());

assertEq(address(recipient).balance - receipientBalanceBefore, amount);

assertEq(senderBalanceBefore - address(this).balance, amount);

// We use the normal `CALL` to send, and thus the `garbage` should be updated.

assertTrue(recipient.garbage() != 0);

}

vm.deal(address(this), originalBalance);

}

function testForceTransferETHToGriever() public {

testForceTransferETHToGriever(1 ether, 0);

testForceTransferETHToGriever(1 ether, 1);

testForceTransferETHToGriever(1 ether, 2);

}

function testTransferWithReturnsFalseReverts() public {

verifySafeTransfer(address(returnsFalse), address(0xBEEF), 1e18, _REVERTS_WITH_SELECTOR);

}

function testTransferWithRevertingReverts() public {

verifySafeTransfer(address(reverting), address(0xBEEF), 1e18, _REVERTS_WITH_SELECTOR);

}

function testTransferWithReturnsTooLittleReverts() public {

verifySafeTransfer(address(returnsTooLittle), address(0xBEEF), 1e18, _REVERTS_WITH_SELECTOR);

}

function testTransferFromWithReturnsFalseReverts() public {

verifySafeTransferFrom(

address(returnsFalse), address(0xFEED), address(0xBEEF), 1e18, _REVERTS_WITH_SELECTOR

);

}

function testTransferFromWithRevertingReverts() public {

verifySafeTransferFrom(

address(reverting), address(0xFEED), address(0xBEEF), 1e18, _REVERTS_WITH_ANY

);

}

function testTransferFromWithReturnsTooLittleReverts() public {

verifySafeTransferFrom(

address(returnsTooLittle),

address(0xFEED),

address(0xBEEF),

1e18,

_REVERTS_WITH_SELECTOR

);

}

function testApproveWithReturnsFalseReverts() public {

verifySafeApprove(address(returnsFalse), address(0xBEEF), 1e18, _REVERTS_WITH_SELECTOR);

}

function testApproveWithRevertingReverts() public {

verifySafeApprove(address(reverting), address(0xBEEF), 1e18, _REVERTS_WITH_SELECTOR);

}

function testApproveWithReturnsTooLittleReverts() public {

verifySafeApprove(address(returnsTooLittle), address(0xBEEF), 1e18, _REVERTS_WITH_SELECTOR);

}

function testBalanceOfStandardERC20() public view {

erc20.balanceOf(address(this));

}

function testBalanceOfStandardERC20(address to, uint256 amount) public {

uint256 originalBalance = erc20.balanceOf(address(this));

while (originalBalance < amount) amount = _random();

while (to == address(this)) to = _randomHashedAddress();

SafeTransferLib.safeTransfer(address(erc20), _brutalized(to), originalBalance - amount);

assertEq(SafeTransferLib.balanceOf(address(erc20), _brutalized(address(this))), amount);

}

function testTransferAllWithStandardERC20() public {

SafeTransferLib.safeTransferAll(address(erc20), address(1));

}

function testTransferAllWithStandardERC20(address to, uint256 amount) public {

uint256 originalBalance = erc20.balanceOf(address(this));

while (originalBalance < amount) amount = _random();

while (to == address(this)) to = _randomHashedAddress();

SafeTransferLib.safeTransfer(address(erc20), _brutalized(to), originalBalance - amount);

assertEq(erc20.balanceOf(address(this)), amount);

assertEq(SafeTransferLib.safeTransferAll(address(erc20), _brutalized(to)), amount);

assertEq(erc20.balanceOf(address(this)), 0);

assertEq(erc20.balanceOf(to), originalBalance);

}

function testTrySafeTransferFrom(address from, address to, uint256 amount) public {

uint256 balance = _random();

while (from == address(this) || to == address(this) || from == to) {

from = _randomNonZeroAddress();

to = _randomNonZeroAddress();

}

erc20.transfer(from, balance);

vm.prank(from);

erc20.approve(address(this), type(uint256).max);

bool result = SafeTransferLib.trySafeTransferFrom(address(erc20), from, to, amount);

assertEq(result, amount <= balance);

}

function testTransferAllFromWithStandardERC20() public {

forceApprove(address(erc20), address(this), address(this), type(uint256).max);

SafeTransferLib.safeTransferAllFrom(address(erc20), address(this), address(1));

}

function testTransferAllFromWithStandardERC20(address from, address to, uint256 amount)

public

{

while (!(to != from && to != address(this) && from != address(this))) {

to = _randomNonZeroAddress();

from = _randomNonZeroAddress();

}

SafeTransferLib.safeTransferAll(address(erc20), _brutalized(from));

uint256 originalBalance = erc20.balanceOf(from);

while (originalBalance < amount) amount = _random();

forceApprove(address(erc20), from, address(this), type(uint256).max);

SafeTransferLib.safeTransferFrom(

address(erc20), _brutalized(from), _brutalized(to), originalBalance - amount

);

assertEq(erc20.balanceOf(from), amount);

assertEq(

SafeTransferLib.safeTransferAllFrom(address(erc20), _brutalized(from), _brutalized(to)),

amount

);

assertEq(erc20.balanceOf(address(this)), 0);

assertEq(erc20.balanceOf(to), originalBalance);

}

function testTransferWithMissingReturn(address to, uint256 amount) public {

verifySafeTransfer(address(missingReturn), to, amount, _SUCCESS);

}

function testTransferWithStandardERC20(address to, uint256 amount) public {

verifySafeTransfer(address(erc20), to, amount, _SUCCESS);

}

function testTransferWithReturnsTooMuch(address to, uint256 amount) public {

verifySafeTransfer(address(returnsTooMuch), to, amount, _SUCCESS);

}

function testTransferWithNonGarbage(address to, uint256 amount) public {

returnsRawBytes.setRawBytes(_generateNonGarbage());

verifySafeTransfer(address(returnsRawBytes), to, amount, _SUCCESS);

}

function testTransferWithNonContractReverts(bytes32, address to, uint256 amount) public {

vm.expectRevert(SafeTransferLib.TransferFailed.selector);

this.safeTransfer(_randomHashedAddress(), to, amount);

}

function safeTransfer(address token, address to, uint256 amount) public {

SafeTransferLib.safeTransfer(token, to, amount);

}

function testTransferETHToContractWithoutFallbackReverts() public {

vm.expectRevert(SafeTransferLib.ETHTransferFailed.selector);

this.safeTransferETH(address(this), 1e18);

}

function testTransferAllETHToContractWithoutFallbackReverts() public {

vm.expectRevert(SafeTransferLib.ETHTransferFailed.selector);

this.safeTransferAllETH(address(this));

}

function testTransferFromWithMissingReturn(address from, address to, uint256 amount) public {

verifySafeTransferFrom(address(missingReturn), from, to, amount, _SUCCESS);

}

function testTransferFromWithStandardERC20(address from, address to, uint256 amount) public {

verifySafeTransferFrom(address(erc20), from, to, amount, _SUCCESS);

}

function testTransferFromWithReturnsTooMuch(address from, address to, uint256 amount) public {

verifySafeTransferFrom(address(returnsTooMuch), from, to, amount, _SUCCESS);

}

function testTransferFromWithNonGarbage(address from, address to, uint256 amount) public {

returnsRawBytes.setRawBytes(_generateNonGarbage());

verifySafeTransferFrom(address(returnsRawBytes), from, to, amount, _SUCCESS);

}

function testTransferFromWithNonContractReverts(

address nonContract,

address from,

address to,

uint256 amount

) public {

if (uint256(uint160(nonContract)) <= 18 || nonContract.code.length > 0) {

return;

}

vm.expectRevert(SafeTransferLib.TransferFromFailed.selector);

this.safeTransferFrom(nonContract, from, to, amount);

}

function testApproveWithMissingReturn(address to, uint256 amount) public {

verifySafeApprove(address(missingReturn), to, amount, _SUCCESS);

}

function testApproveWithStandardERC20(address to, uint256 amount) public {

verifySafeApprove(address(erc20), to, amount, _SUCCESS);

}

function testApproveWithReturnsTooMuch(address to, uint256 amount) public {

verifySafeApprove(address(returnsTooMuch), to, amount, _SUCCESS);

}

function testApproveWithNonGarbage(address to, uint256 amount) public {

returnsRawBytes.setRawBytes(_generateNonGarbage());

verifySafeApprove(address(returnsRawBytes), to, amount, _SUCCESS);

}

function testApproveWithNonContractReverts(address nonContract, address to, uint256 amount)

public

{

if (uint256(uint160(nonContract)) <= 18 || nonContract.code.length > 0) {

return;

}

vm.expectRevert(SafeTransferLib.ApproveFailed.selector);

this.safeApprove(nonContract, to, amount);

}

function testApproveWithRetryWithNonContractReverts(

address nonContract,

address to,

uint256 amount

) public {

if (uint256(uint160(nonContract)) <= 18 || nonContract.code.length > 0) {

return;

}

vm.expectRevert(SafeTransferLib.ApproveFailed.selector);

this.safeApproveWithRetry(nonContract, to, amount);

}

function testApproveWithRetry(address to, uint256 amount0, uint256 amount1) public {

MockERC20LikeUSDT usdt = new MockERC20LikeUSDT();

assertEq(usdt.allowance(address(this), to), 0);

SafeTransferLib.safeApproveWithRetry(address(usdt), _brutalized(to), amount0);

assertEq(usdt.allowance(address(this), to), amount0);

if (amount0 != 0 && amount1 != 0) {

verifySafeApprove(address(usdt), to, amount1, _REVERTS_WITH_SELECTOR);

}

SafeTransferLib.safeApproveWithRetry(address(usdt), _brutalized(to), amount1);

assertEq(usdt.allowance(address(this), to), amount1);

}

function testApproveWithRetry() public {

testApproveWithRetry(address(1), 123, 456);

}

function testTransferETH(bytes32, uint256 amount) public {

amount = _bound(amount, 0, address(this).balance);

SafeTransferLib.safeTransferETH(_randomHashedAddress(), amount);

}

function testTransferAllETH(bytes32) public {

SafeTransferLib.safeTransferAllETH(_randomHashedAddress());

}

function testTransferWithReturnsFalseReverts(address to, uint256 amount) public {

verifySafeTransfer(address(returnsFalse), to, amount, _REVERTS_WITH_SELECTOR);

}

function testTransferWithRevertingReverts(address to, uint256 amount) public {

verifySafeTransfer(address(reverting), to, amount, _REVERTS_WITH_SELECTOR);

}

function testTransferWithReturnsTooLittleReverts(address to, uint256 amount) public {

verifySafeTransfer(address(returnsTooLittle), to, amount, _REVERTS_WITH_SELECTOR);

}

function testTransferWithReturnsTwoReverts(address to, uint256 amount) public {

verifySafeTransfer(address(returnsTwo), to, amount, _REVERTS_WITH_SELECTOR);

}

function testTransferWithGarbageReverts(address to, uint256 amount) public {

returnsRawBytes.setRawBytes(_generateGarbage());

verifySafeTransfer(address(returnsRawBytes), to, amount, _REVERTS_WITH_ANY);

}

function testTransferFromWithReturnsFalseReverts(address from, address to, uint256 amount)

public

{

verifySafeTransferFrom(address(returnsFalse), from, to, amount, _REVERTS_WITH_SELECTOR);

}

function testTransferFromWithRevertingReverts(address from, address to, uint256 amount)

public

{

verifySafeTransferFrom(address(reverting), from, to, amount, _REVERTS_WITH_ANY);

}

function testTransferFromWithReturnsTooLittleReverts(address from, address to, uint256 amount)

public

{

verifySafeTransferFrom(address(returnsTooLittle), from, to, amount, _REVERTS_WITH_SELECTOR);

}

function testTransferFromWithReturnsTwoReverts(address from, address to, uint256 amount)

public

{

verifySafeTransferFrom(address(returnsTwo), from, to, amount, _REVERTS_WITH_SELECTOR);

}

function testTransferFromWithGarbageReverts(address from, address to, uint256 amount) public {

returnsRawBytes.setRawBytes(_generateGarbage());

verifySafeTransferFrom(address(returnsRawBytes), from, to, amount, _REVERTS_WITH_ANY);

}

function testApproveWithReturnsFalseReverts(address to, uint256 amount) public {

verifySafeApprove(address(returnsFalse), to, amount, _REVERTS_WITH_SELECTOR);

}

function testApproveWithRevertingReverts(address to, uint256 amount) public {

verifySafeApprove(address(reverting), to, amount, _REVERTS_WITH_SELECTOR);

}

function testApproveWithReturnsTooLittleReverts(address to, uint256 amount) public {

verifySafeApprove(address(returnsTooLittle), to, amount, _REVERTS_WITH_SELECTOR);

}

function testApproveWithReturnsTwoReverts(address to, uint256 amount) public {

verifySafeApprove(address(returnsTwo), to, amount, _REVERTS_WITH_SELECTOR);

}

function testApproveWithGarbageReverts(address to, uint256 amount) public {

returnsRawBytes.setRawBytes(_generateGarbage());

verifySafeApprove(address(returnsRawBytes), to, amount, _REVERTS_WITH_ANY);

}

function testTransferETHToContractWithoutFallbackReverts(uint256 amount) public {

vm.expectRevert(SafeTransferLib.ETHTransferFailed.selector);

this.safeTransferETH(address(this), amount);

}

function testTransferAllETHToContractWithoutFallbackReverts(uint256) public {

vm.expectRevert(SafeTransferLib.ETHTransferFailed.selector);

this.safeTransferAllETH(address(this));

}

function verifySafeTransfer(address token, address to, uint256 amount, uint256 mode) public {

if (mode == _REVERTS_WITH_SELECTOR) {

vm.expectRevert(SafeTransferLib.TransferFailed.selector);

} else if (mode == _REVERTS_WITH_ANY) {

(bool success,) = address(this).call(

abi.encodeWithSignature(

"verifySafeTransfer(address,address,uint256)", token, to, amount

)

);

assertFalse(success);

return;

}

this.verifySafeTransfer(token, to, amount);

}

function verifySafeTransfer(address token, address to, uint256 amount) public brutalizeMemory {

uint256 preBal = ERC20(token).balanceOf(to);

if (amount == ERC20(token).balanceOf(address(this)) && _randomChance(2)) {

SafeTransferLib.safeTransferAll(address(token), _brutalized(to));

} else {

SafeTransferLib.safeTransfer(address(token), _brutalized(to), amount);

}

uint256 postBal = ERC20(token).balanceOf(to);

if (to == address(this)) {

assertEq(preBal, postBal);

} else {

assertEq(postBal - preBal, amount);

}

}

function verifySafeTransferFrom(

address token,

address from,

address to,

uint256 amount,

uint256 mode

) public {

if (mode == _REVERTS_WITH_SELECTOR) {

vm.expectRevert(SafeTransferLib.TransferFromFailed.selector);

} else if (mode == _REVERTS_WITH_ANY) {

(bool success,) = address(this).call(

abi.encodeWithSignature(

"verifySafeTransferFrom(address,address,address,uint256)",

token,

from,

to,

amount

)

);

assertFalse(success);

return;

}

this.verifySafeTransferFrom(token, from, to, amount);

}

function verifySafeTransferFrom(address token, address from, address to, uint256 amount)

public

brutalizeMemory

{

forceApprove(token, from, address(this), amount);

// We cast to MissingReturnToken here because it won't check

// that there was return data, which accommodates all tokens.

MissingReturnToken(token).transfer(from, amount);

uint256 preBal = ERC20(token).balanceOf(to);

if (amount == ERC20(token).balanceOf(from) && _randomChance(2)) {

SafeTransferLib.safeTransferAllFrom(address(token), _brutalized(from), _brutalized(to));

} else {

SafeTransferLib.safeTransferFrom(token, _brutalized(from), _brutalized(to), amount);

}

uint256 postBal = ERC20(token).balanceOf(to);

if (from == to) {

assertEq(preBal, postBal);

} else {

assertEq(postBal - preBal, amount);

}

}

function verifySafeApprove(address token, address to, uint256 amount, uint256 mode) public {

if (mode == _REVERTS_WITH_SELECTOR) {

vm.expectRevert(SafeTransferLib.ApproveFailed.selector);

} else if (mode == _REVERTS_WITH_ANY) {

(bool success,) = address(this).call(

abi.encodeWithSignature(

"verifySafeApprove(address,address,uint256)", token, to, amount

)

);

assertFalse(success);

return;

}

this.verifySafeApprove(token, to, amount);

}

function verifySafeApprove(address token, address to, uint256 amount) public {

SafeTransferLib.safeApprove(_brutalized(address(token)), _brutalized(to), amount);

assertEq(ERC20(token).allowance(address(this), to), amount);

}

function forceApprove(address token, address from, address to, uint256 amount) public {

if (token == address(erc20)) {

bytes32 allowanceSlot;

/// @solidity memory-safe-assembly

assembly {

mstore(0x20, to)

mstore(0x0c, 0x7f5e9f20) // `_ALLOWANCE_SLOT_SEED`.

mstore(0x00, from)

allowanceSlot := keccak256(0x0c, 0x34)

}

vm.store(token, allowanceSlot, bytes32(uint256(amount)));

} else {

vm.store(

token,

keccak256(abi.encode(to, keccak256(abi.encode(from, uint256(2))))),

bytes32(uint256(amount))

);

}

assertEq(ERC20(token).allowance(from, to), amount, "wrong allowance");

}

function forceSafeTransferETH(address to, uint256 amount, uint256 gasStipend) public {

SafeTransferLib.forceSafeTransferETH(to, amount, gasStipend);

}

function forceSafeTransferETH(address to, uint256 amount) public {

SafeTransferLib.forceSafeTransferETH(to, amount);

}

function safeTransferETH(address to, uint256 amount) public {

SafeTransferLib.safeTransferETH(to, amount);

}

function safeTransferAllETH(address to) public {

SafeTransferLib.safeTransferAllETH(to);

}

function _generateGarbage() internal returns (bytes memory result) {

uint256 r = _random();

/// @solidity memory-safe-assembly

assembly {

for {} 1 {} {

mstore(0x00, r)

result := mload(0x40)

let n := and(r, 0x7f)

mstore(result, n)

r := keccak256(0x00, 0x40)

mstore(add(result, 0x20), r)

mstore(0x40, add(result, 0x100))

if and(or(lt(n, 0x20), iszero(eq(r, 1))), gt(n, 0)) { break }

}

}

}

function _generateNonGarbage() internal returns (bytes memory result) {

uint256 r = _random();

/// @solidity memory-safe-assembly

assembly {

if iszero(and(r, 1)) {

result := mload(0x40)

mstore(result, 0x20)

mstore(add(result, 0x20), 1)

mstore(0x40, add(result, 0x40))

}

}

}

struct _TestTemps {

address signer;

uint256 privateKey;

uint8 v;

bytes32 r;

bytes32 s;

uint256 amount;

address from;

address spender;

address to;

uint256 nonce;

bytes32 hash;

address token;

uint256 deadline;

IPermit2.PermitSingle permit;

}

function testPermit2() public {

_TestTemps memory t;

t.token = address(erc20);

t.deadline = block.timestamp;

(t.signer, t.privateKey) = _randomSigner();

t.spender = _randomNonZeroAddress();

t.amount = _bound(_random(), 0, type(uint160).max);

t.nonce = erc20.nonces(t.signer);

t.hash = keccak256(

abi.encode(_PERMIT_TYPEHASH, t.signer, t.spender, t.amount, t.nonce, t.deadline)

);

t.hash = keccak256(abi.encodePacked("\x19\x01", erc20.DOMAIN_SEPARATOR(), t.hash));

(t.v, t.r, t.s) = vm.sign(t.privateKey, t.hash);

this.permit2(t);

}

function testPermit2OnDAI() public {

_TestTemps memory t;

t.token = _DAI;

t.deadline = block.timestamp;

(t.signer, t.privateKey) = _randomSigner();

t.spender = _randomNonZeroAddress();

t.amount = _bound(_random(), 0, type(uint160).max);

t.nonce = ERC20(_DAI).nonces(t.signer);

t.hash = keccak256(

abi.encode(_DAI_PERMIT_TYPEHASH, t.signer, t.spender, t.nonce, t.deadline, true)

);

t.hash =

keccak256(abi.encodePacked("\x19\x01", SafeTransferLib.DAI_DOMAIN_SEPARATOR, t.hash));

(t.v, t.r, t.s) = vm.sign(t.privateKey, t.hash);

this.permit2(t);

}

function testSimplePermit2AndPermit2TransferFrom() public {

for (uint256 t; t < 10; ++t) {

_testSimplePermit2AndPermit2TransferFrom();

}

}

function _testSimplePermit2AndPermit2TransferFrom() internal {

_TestTemps memory t;

t.token = address(erc20);

t.deadline = block.timestamp;

(t.signer, t.privateKey) = _randomSigner();

t.spender = _randomNonZeroAddress();

t.amount = _bound(_random(), 0, type(uint160).max);

erc20.transfer(t.signer, t.amount);

vm.prank(t.signer);

erc20.approve(_PERMIT2, type(uint256).max);

t.permit.details.token = address(erc20);

t.permit.details.amount = t.amount;

t.permit.details.expiration = type(uint48).max;

(,, t.permit.details.nonce) =

IPermit2(_PERMIT2).allowance(t.signer, address(erc20), t.spender);

t.permit.spender = t.spender;

t.permit.sigDeadline = t.deadline;

_generatePermitSignatureRaw(t);

this.simplePermit2(t);

t.to = _randomNonZeroAddress();

uint256 balanceBefore = erc20.balanceOf(t.to);

vm.startPrank(t.spender);

if (_randomChance(2)) {

SafeTransferLib.permit2TransferFrom(address(erc20), t.signer, t.to, t.amount);

} else {

SafeTransferLib.safeTransferFrom2(address(erc20), t.signer, t.to, t.amount);

}

vm.stopPrank();

if (t.signer != t.to) {

assertEq(erc20.balanceOf(t.to), balanceBefore + t.amount);

}

}

function testSimplePermit2AndPermit2TransferFromGas() public {

_TestTemps memory t;

t.token = address(erc20);

t.deadline = block.timestamp;

(t.signer, t.privateKey) = _randomSigner();

t.spender = _randomNonZeroAddress();

t.amount = type(uint160).max;

erc20.transfer(t.signer, t.amount);

vm.prank(t.signer);

erc20.approve(_PERMIT2, type(uint256).max);

t.permit.details.token = address(erc20);

t.permit.details.amount = uint160(t.amount);

t.permit.details.expiration = type(uint48).max;

(,, t.permit.details.nonce) =

IPermit2(_PERMIT2).allowance(t.signer, address(erc20), t.spender);

t.permit.spender = t.spender;

t.permit.sigDeadline = t.deadline;

_generatePermitSignatureRaw(t);

this.simplePermit2(t);

t.to = _randomNonZeroAddress();

vm.startPrank(t.spender);

SafeTransferLib.permit2TransferFrom(address(erc20), t.signer, t.to, t.amount);

vm.stopPrank();

}

function testPermit2AnythingWithNonContractReverts() public {

_TestTemps memory t;

t.token = _randomHashedAddress();

t.deadline = block.timestamp;

(t.signer, t.privateKey) = _randomSigner();

t.spender = _randomNonZeroAddress();

t.amount = type(uint160).max;

t.permit.details.token = address(t.token);

t.permit.details.amount = uint160(t.amount);

t.permit.details.expiration = type(uint48).max;

(,, t.permit.details.nonce) =

IPermit2(_PERMIT2).allowance(t.signer, address(t.token), t.spender);

t.permit.spender = t.spender;

t.permit.sigDeadline = t.deadline;

_generatePermitSignatureRaw(t);

vm.expectRevert(SafeTransferLib.Permit2Failed.selector);

this.simplePermit2(t);

vm.expectRevert(SafeTransferLib.Permit2Failed.selector);

this.permit2(t);

t.to = _randomNonZeroAddress();

vm.startPrank(t.spender);

vm.expectRevert(SafeTransferLib.TransferFromFailed.selector);

this.permit2TransferFrom(address(t.token), t.signer, t.to, t.amount);

vm.stopPrank();

}

function testPermit2TransferFromInvalidAmount(uint256) public {

_TestTemps memory t;

t.token = address(erc20);

t.deadline = block.timestamp;

(t.signer, t.privateKey) = _randomSigner();

t.spender = _randomNonZeroAddress();

t.amount = _bound(_random(), 0, type(uint160).max);

erc20.transfer(t.signer, t.amount);