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UniStaker.t.sol
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UniStaker.t.sol
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// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.8.23;
import {Vm, Test, stdStorage, StdStorage, console2} from "forge-std/Test.sol";
import {UniStaker, DelegationSurrogate, IERC20, IERC20Delegates} from "src/UniStaker.sol";
import {UniStakerHarness} from "test/harnesses/UniStakerHarness.sol";
import {ERC20VotesMock, ERC20Permit} from "test/mocks/MockERC20Votes.sol";
import {ERC20Fake} from "test/fakes/ERC20Fake.sol";
import {PercentAssertions} from "test/helpers/PercentAssertions.sol";
contract UniStakerTest is Test, PercentAssertions {
ERC20Fake rewardToken;
ERC20VotesMock govToken;
address admin;
address rewardNotifier;
UniStakerHarness uniStaker;
uint256 SCALE_FACTOR;
// console2.log(uint(_domainSeparatorV4()))
bytes32 EIP712_DOMAIN_SEPARATOR = bytes32(
uint256(
108_300_748_413_663_721_746_865_897_746_851_483_791_898_864_552_448_882_835_473_754_343_054_398_579_494
)
);
bytes32 constant PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
event RewardNotifierSet(address indexed account, bool isEnabled);
event AdminSet(address indexed oldAdmin, address indexed newAdmin);
function setUp() public {
// Set the block timestamp to an arbitrary value to avoid introducing assumptions into tests
// based on a starting timestamp of 0, which is the default.
_jumpAhead(1234);
rewardToken = new ERC20Fake();
vm.label(address(rewardToken), "Reward Token");
govToken = new ERC20VotesMock();
vm.label(address(govToken), "Governance Token");
rewardNotifier = address(0xaffab1ebeef);
vm.label(rewardNotifier, "Reward Notifier");
admin = makeAddr("admin");
uniStaker = new UniStakerHarness(rewardToken, govToken, admin);
vm.label(address(uniStaker), "UniStaker");
vm.prank(admin);
uniStaker.setRewardNotifier(rewardNotifier, true);
// Convenience for use in tests
SCALE_FACTOR = uniStaker.SCALE_FACTOR();
}
function _jumpAhead(uint256 _seconds) public {
vm.warp(block.timestamp + _seconds);
}
function _boundMintAmount(uint256 _amount) internal pure returns (uint256) {
return bound(_amount, 0, 100_000_000_000e18);
}
function _mintGovToken(address _to, uint256 _amount) internal {
vm.assume(_to != address(0));
govToken.mint(_to, _amount);
}
function _boundToRealisticStake(uint256 _stakeAmount)
public
pure
returns (uint256 _boundedStakeAmount)
{
_boundedStakeAmount = bound(_stakeAmount, 0.1e18, 25_000_000e18);
}
function _stake(address _depositor, uint256 _amount, address _delegatee)
internal
returns (UniStaker.DepositIdentifier _depositId)
{
vm.assume(_delegatee != address(0));
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _amount);
_depositId = uniStaker.stake(_amount, _delegatee);
vm.stopPrank();
}
function _stake(address _depositor, uint256 _amount, address _delegatee, address _beneficiary)
internal
returns (UniStaker.DepositIdentifier _depositId)
{
vm.assume(_delegatee != address(0) && _beneficiary != address(0));
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _amount);
_depositId = uniStaker.stake(_amount, _delegatee, _beneficiary);
vm.stopPrank();
}
function _fetchDeposit(UniStaker.DepositIdentifier _depositId)
internal
view
returns (UniStaker.Deposit memory)
{
(uint256 _balance, address _owner, address _delegatee, address _beneficiary) =
uniStaker.deposits(_depositId);
return UniStaker.Deposit({
balance: _balance,
owner: _owner,
delegatee: _delegatee,
beneficiary: _beneficiary
});
}
function _boundMintAndStake(address _depositor, uint256 _amount, address _delegatee)
internal
returns (uint256 _boundedAmount, UniStaker.DepositIdentifier _depositId)
{
_boundedAmount = _boundMintAmount(_amount);
_mintGovToken(_depositor, _boundedAmount);
_depositId = _stake(_depositor, _boundedAmount, _delegatee);
}
function _boundMintAndStake(
address _depositor,
uint256 _amount,
address _delegatee,
address _beneficiary
) internal returns (uint256 _boundedAmount, UniStaker.DepositIdentifier _depositId) {
_boundedAmount = _boundMintAmount(_amount);
_mintGovToken(_depositor, _boundedAmount);
_depositId = _stake(_depositor, _boundedAmount, _delegatee, _beneficiary);
}
// Scales first param and divides it by second
function _scaledDiv(uint256 _x, uint256 _y) public view returns (uint256) {
return (_x * SCALE_FACTOR) / _y;
}
function _sign(uint256 _privateKey, bytes32 _messageHash) internal pure returns (bytes memory) {
(uint8 _v, bytes32 _r, bytes32 _s) = vm.sign(_privateKey, _messageHash);
return abi.encodePacked(_r, _s, _v);
}
function _modifyMessage(bytes32 _message, uint256 _index) internal pure returns (bytes32) {
_index = bound(_index, 0, 31);
bytes memory _messageBytes = abi.encodePacked(_message);
// zero out the byte at the given index, or set it to 1 if it's already zero
if (_messageBytes[_index] == 0) _messageBytes[_index] = bytes1(uint8(1));
else _messageBytes[_index] = bytes1(uint8(0));
return bytes32(_messageBytes);
}
function _modifySignature(bytes memory _signature, uint256 _index)
internal
pure
returns (bytes memory)
{
_index = bound(_index, 0, _signature.length - 1);
// zero out the byte at the given index, or set it to 1 if it's already zero
if (_signature[_index] == 0) _signature[_index] = bytes1(uint8(1));
else _signature[_index] = bytes1(uint8(0));
return _signature;
}
}
contract Constructor is UniStakerTest {
function test_SetsTheRewardTokenStakeTokenAndRewardNotifier() public {
assertEq(address(uniStaker.REWARD_TOKEN()), address(rewardToken));
assertEq(address(uniStaker.STAKE_TOKEN()), address(govToken));
assertEq(uniStaker.admin(), admin);
}
function testFuzz_SetsTheRewardTokenStakeTokenAndOwnerToArbitraryAddresses(
address _rewardToken,
address _stakeToken,
address _admin
) public {
vm.assume(_admin != address(0));
UniStaker _uniStaker = new UniStaker(IERC20(_rewardToken), IERC20Delegates(_stakeToken), _admin);
assertEq(address(_uniStaker.REWARD_TOKEN()), address(_rewardToken));
assertEq(address(_uniStaker.STAKE_TOKEN()), address(_stakeToken));
assertEq(_uniStaker.admin(), _admin);
}
}
contract Stake is UniStakerTest {
function testFuzz_DeploysAndTransfersTokensToANewSurrogateWhenAnAccountStakes(
address _depositor,
uint256 _amount,
address _delegatee
) public {
_amount = bound(_amount, 1, type(uint224).max);
_mintGovToken(_depositor, _amount);
_stake(_depositor, _amount, _delegatee);
DelegationSurrogate _surrogate = uniStaker.surrogates(_delegatee);
assertEq(govToken.balanceOf(address(_surrogate)), _amount);
assertEq(govToken.delegates(address(_surrogate)), _delegatee);
assertEq(govToken.balanceOf(_depositor), 0);
}
function testFuzz_EmitsAStakingDepositEventWhenStakingWithoutASpecifiedBeneficiary(
address _depositor,
uint256 _amount,
address _delegatee
) public {
_amount = bound(_amount, 1, type(uint224).max);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier depositId = uniStaker.exposed_useDepositId();
vm.assume(_delegatee != address(0));
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _amount);
vm.expectEmit();
emit UniStaker.StakeDeposited(
_depositor,
UniStaker.DepositIdentifier.wrap(UniStaker.DepositIdentifier.unwrap(depositId) + 1),
_amount,
_amount
);
uniStaker.stake(_amount, _delegatee);
vm.stopPrank();
}
function testFuzz_EmitsABeneficiaryAlteredEventWhenStakingWithoutASpecifiedBeneficiary(
address _depositor,
uint256 _amount,
address _delegatee
) public {
_amount = bound(_amount, 1, type(uint224).max);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier depositId = uniStaker.exposed_useDepositId();
vm.assume(_delegatee != address(0));
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _amount);
vm.expectEmit();
emit UniStaker.BeneficiaryAltered(
UniStaker.DepositIdentifier.wrap(UniStaker.DepositIdentifier.unwrap(depositId) + 1),
address(0),
_depositor
);
uniStaker.stake(_amount, _delegatee);
vm.stopPrank();
}
function testFuzz_EmitsADelegateeAlteredEventWhenStakingWithoutASpecifiedBeneficiary(
address _depositor,
uint256 _amount,
address _delegatee
) public {
_amount = bound(_amount, 1, type(uint224).max);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier depositId = uniStaker.exposed_useDepositId();
vm.assume(_delegatee != address(0));
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _amount);
vm.expectEmit();
emit UniStaker.DelegateeAltered(
UniStaker.DepositIdentifier.wrap(UniStaker.DepositIdentifier.unwrap(depositId) + 1),
address(0),
_delegatee
);
uniStaker.stake(_amount, _delegatee);
vm.stopPrank();
}
function testFuzz_EmitsAStakingDepositEventWhenStakingWithASpecifiedBeneficiary(
address _depositor,
uint256 _amount,
address _delegatee,
address _beneficiary
) public {
_amount = bound(_amount, 1, type(uint224).max);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier depositId = uniStaker.exposed_useDepositId();
vm.assume(_delegatee != address(0) && _beneficiary != address(0));
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _amount);
vm.expectEmit();
emit UniStaker.StakeDeposited(
_depositor,
UniStaker.DepositIdentifier.wrap(UniStaker.DepositIdentifier.unwrap(depositId) + 1),
_amount,
_amount
);
uniStaker.stake(_amount, _delegatee, _beneficiary);
vm.stopPrank();
}
function testFuzz_EmitsABeneficiaryAlteredEventWhenStakingWithASpecifiedBeneficiary(
address _depositor,
uint256 _amount,
address _delegatee,
address _beneficiary
) public {
_amount = bound(_amount, 1, type(uint224).max);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier depositId = uniStaker.exposed_useDepositId();
vm.assume(_delegatee != address(0) && _beneficiary != address(0));
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _amount);
vm.expectEmit();
emit UniStaker.BeneficiaryAltered(
UniStaker.DepositIdentifier.wrap(UniStaker.DepositIdentifier.unwrap(depositId) + 1),
address(0),
_beneficiary
);
uniStaker.stake(_amount, _delegatee, _beneficiary);
vm.stopPrank();
}
function testFuzz_EmitsADelegateeAlteredEventWhenStakingWithASpecifiedBeneficiary(
address _depositor,
uint256 _amount,
address _delegatee,
address _beneficiary
) public {
_amount = bound(_amount, 1, type(uint224).max);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier depositId = uniStaker.exposed_useDepositId();
vm.assume(_delegatee != address(0) && _beneficiary != address(0));
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _amount);
vm.expectEmit();
emit UniStaker.DelegateeAltered(
UniStaker.DepositIdentifier.wrap(UniStaker.DepositIdentifier.unwrap(depositId) + 1),
address(0),
_delegatee
);
uniStaker.stake(_amount, _delegatee, _beneficiary);
vm.stopPrank();
}
function testFuzz_TransfersToAnExistingSurrogateWhenStakedToTheSameDelegatee(
address _depositor1,
uint256 _amount1,
address _depositor2,
uint256 _amount2,
address _delegatee
) public {
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor1, _amount1);
_mintGovToken(_depositor2, _amount2);
// Perform first stake with this delegatee
_stake(_depositor1, _amount1, _delegatee);
// Remember the surrogate which was deployed for this delegatee
DelegationSurrogate _surrogate = uniStaker.surrogates(_delegatee);
// Perform the second stake with this delegatee
_stake(_depositor2, _amount2, _delegatee);
// Ensure surrogate for this delegatee hasn't changed and has summed stake balance
assertEq(address(uniStaker.surrogates(_delegatee)), address(_surrogate));
assertEq(govToken.delegates(address(_surrogate)), _delegatee);
assertEq(govToken.balanceOf(address(_surrogate)), _amount1 + _amount2);
assertEq(govToken.balanceOf(_depositor1), 0);
assertEq(govToken.balanceOf(_depositor2), 0);
}
function testFuzz_DeploysAndTransfersTokenToTwoSurrogatesWhenAccountsStakesToDifferentDelegatees(
address _depositor1,
uint256 _amount1,
address _depositor2,
uint256 _amount2,
address _delegatee1,
address _delegatee2
) public {
vm.assume(_delegatee1 != _delegatee2);
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor1, _amount1);
_mintGovToken(_depositor2, _amount2);
// Perform first stake with first delegatee
_stake(_depositor1, _amount1, _delegatee1);
// Remember the surrogate which was deployed for first delegatee
DelegationSurrogate _surrogate1 = uniStaker.surrogates(_delegatee1);
// Perform second stake with second delegatee
_stake(_depositor2, _amount2, _delegatee2);
// Remember the surrogate which was deployed for first delegatee
DelegationSurrogate _surrogate2 = uniStaker.surrogates(_delegatee2);
// Ensure surrogates are different with discreet delegation & balances
assertTrue(_surrogate1 != _surrogate2);
assertEq(govToken.delegates(address(_surrogate1)), _delegatee1);
assertEq(govToken.balanceOf(address(_surrogate1)), _amount1);
assertEq(govToken.delegates(address(_surrogate2)), _delegatee2);
assertEq(govToken.balanceOf(address(_surrogate2)), _amount2);
assertEq(govToken.balanceOf(_depositor1), 0);
assertEq(govToken.balanceOf(_depositor2), 0);
}
function testFuzz_UpdatesTheTotalStakedWhenAnAccountStakes(
address _depositor,
uint256 _amount,
address _delegatee
) public {
_amount = _boundMintAmount(_amount);
_mintGovToken(_depositor, _amount);
_stake(_depositor, _amount, _delegatee);
assertEq(uniStaker.totalStaked(), _amount);
}
function testFuzz_UpdatesTheTotalStakedWhenTwoAccountsStake(
address _depositor1,
uint256 _amount1,
address _depositor2,
uint256 _amount2,
address _delegatee1,
address _delegatee2
) public {
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor1, _amount1);
_mintGovToken(_depositor2, _amount2);
_stake(_depositor1, _amount1, _delegatee1);
assertEq(uniStaker.totalStaked(), _amount1);
_stake(_depositor2, _amount2, _delegatee2);
assertEq(uniStaker.totalStaked(), _amount1 + _amount2);
}
function testFuzz_UpdatesAnAccountsTotalStakedAccounting(
address _depositor,
uint256 _amount1,
uint256 _amount2,
address _delegatee1,
address _delegatee2
) public {
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor, _amount1 + _amount2);
// First stake + check total
_stake(_depositor, _amount1, _delegatee1);
assertEq(uniStaker.depositorTotalStaked(_depositor), _amount1);
// Second stake + check total
_stake(_depositor, _amount2, _delegatee2);
assertEq(uniStaker.depositorTotalStaked(_depositor), _amount1 + _amount2);
}
function testFuzz_UpdatesDifferentAccountsTotalStakedAccountingIndependently(
address _depositor1,
uint256 _amount1,
address _depositor2,
uint256 _amount2,
address _delegatee1,
address _delegatee2
) public {
vm.assume(_depositor1 != _depositor2);
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor1, _amount1);
_mintGovToken(_depositor2, _amount2);
_stake(_depositor1, _amount1, _delegatee1);
assertEq(uniStaker.depositorTotalStaked(_depositor1), _amount1);
_stake(_depositor2, _amount2, _delegatee2);
assertEq(uniStaker.depositorTotalStaked(_depositor2), _amount2);
}
function testFuzz_TracksTheBalanceForASpecificDeposit(
address _depositor,
uint256 _amount,
address _delegatee
) public {
_amount = _boundMintAmount(_amount);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier _depositId = _stake(_depositor, _amount, _delegatee);
UniStaker.Deposit memory _deposit = _fetchDeposit(_depositId);
assertEq(_deposit.balance, _amount);
assertEq(_deposit.owner, _depositor);
assertEq(_deposit.delegatee, _delegatee);
}
function testFuzz_TracksTheBalanceForDifferentDepositsFromTheSameAccountIndependently(
address _depositor,
uint256 _amount1,
uint256 _amount2,
address _delegatee1,
address _delegatee2
) public {
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor, _amount1 + _amount2);
// Perform both deposits and track their identifiers separately
UniStaker.DepositIdentifier _depositId1 = _stake(_depositor, _amount1, _delegatee1);
UniStaker.DepositIdentifier _depositId2 = _stake(_depositor, _amount2, _delegatee2);
UniStaker.Deposit memory _deposit1 = _fetchDeposit(_depositId1);
UniStaker.Deposit memory _deposit2 = _fetchDeposit(_depositId2);
// Check that the deposits have been recorded independently
assertEq(_deposit1.balance, _amount1);
assertEq(_deposit1.owner, _depositor);
assertEq(_deposit1.delegatee, _delegatee1);
assertEq(_deposit2.balance, _amount2);
assertEq(_deposit2.owner, _depositor);
assertEq(_deposit2.delegatee, _delegatee2);
}
function testFuzz_TracksTheBalanceForDepositsFromDifferentAccountsIndependently(
address _depositor1,
address _depositor2,
uint256 _amount1,
uint256 _amount2,
address _delegatee1,
address _delegatee2
) public {
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor1, _amount1);
_mintGovToken(_depositor2, _amount2);
// Perform both deposits and track their identifiers separately
UniStaker.DepositIdentifier _depositId1 = _stake(_depositor1, _amount1, _delegatee1);
UniStaker.DepositIdentifier _depositId2 = _stake(_depositor2, _amount2, _delegatee2);
UniStaker.Deposit memory _deposit1 = _fetchDeposit(_depositId1);
UniStaker.Deposit memory _deposit2 = _fetchDeposit(_depositId2);
// Check that the deposits have been recorded independently
assertEq(_deposit1.balance, _amount1);
assertEq(_deposit1.owner, _depositor1);
assertEq(_deposit1.delegatee, _delegatee1);
assertEq(_deposit2.balance, _amount2);
assertEq(_deposit2.owner, _depositor2);
assertEq(_deposit2.delegatee, _delegatee2);
}
function testFuzz_AssignsEarningPowerToDepositorIfNoBeneficiaryIsSpecified(
address _depositor,
uint256 _amount,
address _delegatee
) public {
_amount = _boundMintAmount(_amount);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier _depositId = _stake(_depositor, _amount, _delegatee);
UniStaker.Deposit memory _deposit = _fetchDeposit(_depositId);
assertEq(uniStaker.earningPower(_depositor), _amount);
assertEq(_deposit.beneficiary, _depositor);
}
function testFuzz_AssignsEarningPowerToTheBeneficiaryProvided(
address _depositor,
uint256 _amount,
address _delegatee,
address _beneficiary
) public {
_amount = _boundMintAmount(_amount);
_mintGovToken(_depositor, _amount);
UniStaker.DepositIdentifier _depositId = _stake(_depositor, _amount, _delegatee, _beneficiary);
UniStaker.Deposit memory _deposit = _fetchDeposit(_depositId);
assertEq(uniStaker.earningPower(_beneficiary), _amount);
assertEq(_deposit.beneficiary, _beneficiary);
}
function testFuzz_AssignsEarningPowerToDifferentBeneficiariesForDifferentDepositsFromTheSameDepositor(
address _depositor,
uint256 _amount1,
uint256 _amount2,
address _delegatee,
address _beneficiary1,
address _beneficiary2
) public {
vm.assume(_beneficiary1 != _beneficiary2);
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor, _amount1 + _amount2);
// Perform both deposits and track their identifiers separately
UniStaker.DepositIdentifier _depositId1 =
_stake(_depositor, _amount1, _delegatee, _beneficiary1);
UniStaker.DepositIdentifier _depositId2 =
_stake(_depositor, _amount2, _delegatee, _beneficiary2);
UniStaker.Deposit memory _deposit1 = _fetchDeposit(_depositId1);
UniStaker.Deposit memory _deposit2 = _fetchDeposit(_depositId2);
// Check that the earning power has been recorded independently
assertEq(_deposit1.beneficiary, _beneficiary1);
assertEq(uniStaker.earningPower(_beneficiary1), _amount1);
assertEq(_deposit2.beneficiary, _beneficiary2);
assertEq(uniStaker.earningPower(_beneficiary2), _amount2);
}
function testFuzz_AssignsEarningPowerToTheSameBeneficiarySpecifiedByTwoDifferentDepositors(
address _depositor1,
address _depositor2,
uint256 _amount1,
uint256 _amount2,
address _delegatee,
address _beneficiary
) public {
_amount1 = _boundMintAmount(_amount1);
_amount2 = _boundMintAmount(_amount2);
_mintGovToken(_depositor1, _amount1);
_mintGovToken(_depositor2, _amount2);
// Perform both deposits and track their identifiers separately
UniStaker.DepositIdentifier _depositId1 =
_stake(_depositor1, _amount1, _delegatee, _beneficiary);
UniStaker.DepositIdentifier _depositId2 =
_stake(_depositor2, _amount2, _delegatee, _beneficiary);
UniStaker.Deposit memory _deposit1 = _fetchDeposit(_depositId1);
UniStaker.Deposit memory _deposit2 = _fetchDeposit(_depositId2);
assertEq(_deposit1.beneficiary, _beneficiary);
assertEq(_deposit2.beneficiary, _beneficiary);
assertEq(uniStaker.earningPower(_beneficiary), _amount1 + _amount2);
}
mapping(UniStaker.DepositIdentifier depositId => bool isUsed) isIdUsed;
function test_NeverReusesADepositIdentifier() public {
address _depositor = address(0xdeadbeef);
uint256 _amount = 116;
address _delegatee = address(0xaceface);
UniStaker.DepositIdentifier _depositId;
// Repeat the deposit over and over ensuring a new DepositIdentifier is assigned each time.
for (uint256 _i; _i < 5000; _i++) {
// Perform the stake and save the deposit identifier
_mintGovToken(_depositor, _amount);
_depositId = _stake(_depositor, _amount, _delegatee);
// Ensure the identifier hasn't yet been used
assertFalse(isIdUsed[_depositId]);
// Record the fact this deposit Id has been used
isIdUsed[_depositId] = true;
}
// Now make a bunch more deposits with different depositors and parameters, continuing to check
// that the DepositIdentifier is never reused.
for (uint256 _i; _i < 5000; _i++) {
// Perform the stake and save the deposit identifier
_amount = _bound(_amount, 0, 100_000_000_000e18);
_mintGovToken(_depositor, _amount);
_depositId = _stake(_depositor, _amount, _delegatee);
// Ensure the identifier hasn't yet been used
assertFalse(isIdUsed[_depositId]);
// Record the fact this deposit Id has been used
isIdUsed[_depositId] = true;
// Assign new inputs for the next deposit by hashing the last inputs
_depositor = address(uint160(uint256(keccak256(abi.encode(_depositor)))));
_amount = uint256(keccak256(abi.encode(_amount)));
_delegatee = address(uint160(uint256(keccak256(abi.encode(_delegatee)))));
}
}
function testFuzz_RevertIf_DelegateeIsTheZeroAddress(address _depositor, uint256 _amount) public {
_amount = _boundMintAmount(_amount);
_mintGovToken(_depositor, _amount);
govToken.approve(address(uniStaker), _amount);
vm.prank(_depositor);
vm.expectRevert(UniStaker.UniStaker__InvalidAddress.selector);
uniStaker.stake(_amount, address(0));
}
function testFuzz_RevertIf_BeneficiaryIsTheZeroAddress(
address _depositor,
uint256 _amount,
address _delegatee
) public {
vm.assume(_delegatee != address(0));
_amount = _boundMintAmount(_amount);
_mintGovToken(_depositor, _amount);
govToken.approve(address(uniStaker), _amount);
vm.prank(_depositor);
vm.expectRevert(UniStaker.UniStaker__InvalidAddress.selector);
uniStaker.stake(_amount, _delegatee, address(0));
}
}
contract PermitAndStake is UniStakerTest {
using stdStorage for StdStorage;
function testFuzz_PerformsTheApprovalByCallingPermitThenPerformsStake(
uint256 _depositorPrivateKey,
uint256 _depositAmount,
address _delegatee,
address _beneficiary,
uint256 _deadline,
uint256 _currentNonce
) public {
vm.assume(_delegatee != address(0) && _beneficiary != address(0));
_deadline = bound(_deadline, block.timestamp + 1, type(uint256).max);
_depositorPrivateKey = bound(_depositorPrivateKey, 1, 100e18);
address _depositor = vm.addr(_depositorPrivateKey);
_depositAmount = _boundMintAmount(_depositAmount);
_mintGovToken(_depositor, _depositAmount);
stdstore.target(address(govToken)).sig("nonces(address)").with_key(_depositor).checked_write(
_currentNonce
);
bytes32 _message = keccak256(
abi.encode(
PERMIT_TYPEHASH,
_depositor,
address(uniStaker),
_depositAmount,
govToken.nonces(_depositor),
_deadline
)
);
bytes32 _messageHash =
keccak256(abi.encodePacked("\x19\x01", govToken.DOMAIN_SEPARATOR(), _message));
(uint8 _v, bytes32 _r, bytes32 _s) = vm.sign(_depositorPrivateKey, _messageHash);
vm.prank(_depositor);
UniStaker.DepositIdentifier _depositId =
uniStaker.permitAndStake(_depositAmount, _delegatee, _beneficiary, _deadline, _v, _r, _s);
UniStaker.Deposit memory _deposit = _fetchDeposit(_depositId);
assertEq(_deposit.balance, _depositAmount);
assertEq(_deposit.owner, _depositor);
assertEq(_deposit.delegatee, _delegatee);
assertEq(_deposit.beneficiary, _beneficiary);
}
function testFuzz_RevertIf_ThePermitSignatureIsInvalid(
address _notDepositor,
uint256 _depositorPrivateKey,
uint256 _depositAmount,
address _delegatee,
address _beneficiary,
uint256 _deadline
) public {
vm.assume(_delegatee != address(0) && _beneficiary != address(0));
_deadline = bound(_deadline, block.timestamp + 1, type(uint256).max);
_depositorPrivateKey = bound(_depositorPrivateKey, 1, 100e18);
address _depositor = vm.addr(_depositorPrivateKey);
vm.assume(_notDepositor != _depositor);
_depositAmount = _boundMintAmount(_depositAmount);
_mintGovToken(_depositor, _depositAmount);
bytes32 _message = keccak256(
abi.encode(
PERMIT_TYPEHASH,
_notDepositor,
address(uniStaker),
_depositAmount,
govToken.nonces(_depositor),
_deadline
)
);
bytes32 _messageHash =
keccak256(abi.encodePacked("\x19\x01", govToken.DOMAIN_SEPARATOR(), _message));
(uint8 _v, bytes32 _r, bytes32 _s) = vm.sign(_depositorPrivateKey, _messageHash);
vm.prank(_notDepositor);
vm.expectRevert(
abi.encodeWithSelector(ERC20Permit.ERC2612InvalidSigner.selector, _depositor, _notDepositor)
);
uniStaker.permitAndStake(_depositAmount, _delegatee, _beneficiary, _deadline, _v, _r, _s);
}
}
contract StakeOnBehalf is UniStakerTest {
using stdStorage for StdStorage;
function testFuzz_StakesOnBehalfOfAnotherAccount(
uint256 _depositorPrivateKey,
address _sender,
uint256 _depositAmount,
address _delegatee,
address _beneficiary,
uint256 _currentNonce
) public {
vm.assume(_delegatee != address(0) && _beneficiary != address(0) && _sender != address(0));
_depositorPrivateKey = bound(_depositorPrivateKey, 1, 100e18);
address _depositor = vm.addr(_depositorPrivateKey);
_depositAmount = _boundMintAmount(_depositAmount);
_mintGovToken(_depositor, _depositAmount);
stdstore.target(address(uniStaker)).sig("nonces(address)").with_key(_depositor).checked_write(
_currentNonce
);
vm.prank(_depositor);
govToken.approve(address(uniStaker), _depositAmount);
bytes32 _message = keccak256(
abi.encode(
uniStaker.STAKE_TYPEHASH(),
_depositAmount,
_delegatee,
_beneficiary,
_depositor,
uniStaker.nonces(_depositor)
)
);
bytes32 _messageHash =
keccak256(abi.encodePacked("\x19\x01", EIP712_DOMAIN_SEPARATOR, _message));
bytes memory _signature = _sign(_depositorPrivateKey, _messageHash);
vm.prank(_sender);
UniStaker.DepositIdentifier _depositId =
uniStaker.stakeOnBehalf(_depositAmount, _delegatee, _beneficiary, _depositor, _signature);
UniStaker.Deposit memory _deposit = _fetchDeposit(_depositId);
assertEq(_deposit.balance, _depositAmount);
assertEq(_deposit.owner, _depositor);
assertEq(_deposit.delegatee, _delegatee);
assertEq(_deposit.beneficiary, _beneficiary);
}
function testFuzz_RevertIf_WrongNonceIsUsed(
uint256 _depositorPrivateKey,
address _sender,
uint256 _depositAmount,
address _delegatee,
address _beneficiary,
uint256 _currentNonce,
uint256 _suppliedNonce
) public {
vm.assume(_currentNonce != _suppliedNonce);
vm.assume(_delegatee != address(0) && _beneficiary != address(0) && _sender != address(0));
_depositorPrivateKey = bound(_depositorPrivateKey, 1, 100e18);
address _depositor = vm.addr(_depositorPrivateKey);
_depositAmount = _boundMintAmount(_depositAmount);
_mintGovToken(_depositor, _depositAmount);
stdstore.target(address(uniStaker)).sig("nonces(address)").with_key(_depositor).checked_write(
_currentNonce
);
vm.prank(_depositor);
govToken.approve(address(uniStaker), _depositAmount);
bytes32 _message = keccak256(
abi.encode(
uniStaker.STAKE_TYPEHASH(),
_depositAmount,
_delegatee,
_beneficiary,
_depositor,
_suppliedNonce
)
);
bytes32 _messageHash =
keccak256(abi.encodePacked("\x19\x01", EIP712_DOMAIN_SEPARATOR, _message));
bytes memory _signature = _sign(_depositorPrivateKey, _messageHash);
vm.expectRevert(UniStaker.UniStaker__InvalidSignature.selector);
vm.prank(_sender);
uniStaker.stakeOnBehalf(_depositAmount, _delegatee, _beneficiary, _depositor, _signature);
}
function testFuzz_RevertIf_InvalidSignatureIsPassed(
uint256 _depositorPrivateKey,
address _sender,
uint256 _depositAmount,
address _delegatee,
address _beneficiary,
uint256 _currentNonce,
uint256 _randomSeed
) public {
vm.assume(_delegatee != address(0) && _beneficiary != address(0));
_depositorPrivateKey = bound(_depositorPrivateKey, 1, 100e18);
address _depositor = vm.addr(_depositorPrivateKey);
stdstore.target(address(uniStaker)).sig("nonces(address)").with_key(_depositor).checked_write(
_currentNonce
);
_depositAmount = _boundMintAmount(_depositAmount);
_mintGovToken(_depositor, _depositAmount);
vm.prank(_depositor);
govToken.approve(address(uniStaker), _depositAmount);
bytes32 _message = keccak256(
abi.encode(
uniStaker.STAKE_TYPEHASH(),
_depositAmount,
_delegatee,
_beneficiary,
_depositor,
uniStaker.nonces(_depositor)
)
);
bytes32 _messageHash =
keccak256(abi.encodePacked("\x19\x01", EIP712_DOMAIN_SEPARATOR, _message));
// Here we use `_randomSeed` as an arbitrary source of randomness to replace a legit parameter
// with an attack-like one.
if (_randomSeed % 5 == 0) {
_depositAmount = uint256(keccak256(abi.encode(_depositAmount)));
} else if (_randomSeed % 5 == 1) {
_delegatee = address(uint160(uint256(keccak256(abi.encode(_delegatee)))));
} else if (_randomSeed % 5 == 2) {
_depositor = address(uint160(uint256(keccak256(abi.encode(_depositor)))));
} else if (_randomSeed % 5 == 3) {
_messageHash = _modifyMessage(_messageHash, uint256(keccak256(abi.encode(_randomSeed))));
}
bytes memory _signature = _sign(_depositorPrivateKey, _messageHash);
if (_randomSeed % 5 == 4) _signature = _modifySignature(_signature, _randomSeed);
vm.prank(_sender);
vm.expectRevert(UniStaker.UniStaker__InvalidSignature.selector);
uniStaker.stakeOnBehalf(_depositAmount, _delegatee, _beneficiary, _depositor, _signature);
}
}
contract StakeMore is UniStakerTest {
function testFuzz_TransfersStakeToTheExistingSurrogate(
address _depositor,
uint256 _depositAmount,
uint256 _addAmount,
address _delegatee,
address _beneficiary
) public {
UniStaker.DepositIdentifier _depositId;
(_depositAmount, _depositId) =
_boundMintAndStake(_depositor, _depositAmount, _delegatee, _beneficiary);
UniStaker.Deposit memory _deposit = _fetchDeposit(_depositId);
DelegationSurrogate _surrogate = uniStaker.surrogates(_deposit.delegatee);
_addAmount = _boundToRealisticStake(_addAmount);
_mintGovToken(_depositor, _addAmount);
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _addAmount);
uniStaker.stakeMore(_depositId, _addAmount);
vm.stopPrank();
assertEq(govToken.balanceOf(address(_surrogate)), _depositAmount + _addAmount);
}
function testFuzz_AddsToExistingBeneficiaryEarningPower(
address _depositor,
uint256 _depositAmount,
uint256 _addAmount,
address _delegatee,
address _beneficiary
) public {
UniStaker.DepositIdentifier _depositId;
(_depositAmount, _depositId) =
_boundMintAndStake(_depositor, _depositAmount, _delegatee, _beneficiary);
_addAmount = _boundToRealisticStake(_addAmount);
_mintGovToken(_depositor, _addAmount);
vm.startPrank(_depositor);
govToken.approve(address(uniStaker), _addAmount);
uniStaker.stakeMore(_depositId, _addAmount);
vm.stopPrank();
assertEq(uniStaker.earningPower(_beneficiary), _depositAmount + _addAmount);
}
function testFuzz_AddsToTheTotalStaked(
address _depositor,
uint256 _depositAmount,
uint256 _addAmount,
address _delegatee,