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tests of the burning functionality

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Signed-off-by: Uncle Fatso <uncle.fatso@ghostchain.io>
This commit is contained in:
Uncle Fatso 2025-06-27 21:39:38 +03:00
parent 15dfd49163
commit 9e40d4ed4f
Signed by: f4ts0
GPG Key ID: 565F4F2860226EBB
2 changed files with 105 additions and 1 deletions
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2
src/mocks/Reserve.sol
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@ -57,7 +57,7 @@ contract Reserve is ERC20Permit {
_mint(account, msg.value * conversionRate); _mint(account, msg.value * conversionRate);
} }
function burn(uint256 amount) external payable { function burn(uint256 amount) external {
_burn(msg.sender, amount); _burn(msg.sender, amount);
uint256 valueDiff = address(this).balance - accumulatedDonation; uint256 valueDiff = address(this).balance - accumulatedDonation;
uint256 valueBack = amount * valueDiff / (amount + totalSupply()); uint256 valueBack = amount * valueDiff / (amount + totalSupply());

104
test/tokens/Reserve.t.sol
View File

@ -150,6 +150,28 @@ contract ReserveTest is Test {
assertEq(faucetAddress.balance, sendAmount); assertEq(faucetAddress.balance, sendAmount);
} }
function test_withdraw_onlyAccumulatedDonationsCouldBeWithdrawn() public {
assertEq(address(reserve).balance, 0);
vm.prank(initializer);
reserve.changeDonationRate(5 * 1e4); // 50%
deal(aliceAddress, sendAmount);
vm.prank(aliceAddress);
reserve.mint{ value: sendAmount }(aliceAddress);
assertEq(address(reserve).balance, sendAmount);
vm.prank(initializer);
reserve.withdraw(payable(faucetAddress));
assertEq(address(reserve).balance, sendAmount / 2);
assertEq(faucetAddress.balance, sendAmount / 2);
vm.prank(initializer);
reserve.withdraw(payable(faucetAddress));
assertEq(address(reserve).balance, sendAmount / 2);
assertEq(faucetAddress.balance, sendAmount / 2);
}
function test_withdraw_couldNotBeDoneByArbitraryAddress() public { function test_withdraw_couldNotBeDoneByArbitraryAddress() public {
assertEq(address(reserve).balance, 0); assertEq(address(reserve).balance, 0);
@ -166,4 +188,86 @@ contract ReserveTest is Test {
assertEq(address(reserve).balance, sendAmount); assertEq(address(reserve).balance, sendAmount);
assertEq(aliceAddress.balance, 0); assertEq(aliceAddress.balance, 0);
} }
function test_burn_shouldReturnFullAmountIfRateNotSet() public {
deal(aliceAddress, sendAmount);
vm.prank(aliceAddress);
reserve.mint{ value: sendAmount }(aliceAddress);
uint256 balance = reserve.balanceOf(aliceAddress);
assertEq(reserve.totalSupply(), sendAmount * conversionRate);
assertEq(reserve.totalSupply(), balance);
assertEq(reserve.accumulatedDonation(), 0);
assertEq(aliceAddress.balance, 0);
vm.prank(aliceAddress);
reserve.burn(balance);
assertEq(reserve.totalSupply(), 0);
assertEq(reserve.balanceOf(aliceAddress), 0);
assertEq(reserve.accumulatedDonation(), 0);
assertEq(aliceAddress.balance, sendAmount);
}
function test_burn_shouldTakeDonationInAccordanceToRate() public {
vm.prank(initializer);
reserve.changeDonationRate(5 * 1e4); // 50%
deal(aliceAddress, sendAmount);
vm.prank(aliceAddress);
reserve.mint{ value: sendAmount }(aliceAddress);
uint256 balance = reserve.balanceOf(aliceAddress);
assertEq(reserve.totalSupply(), sendAmount * conversionRate);
assertEq(reserve.totalSupply(), balance);
assertEq(reserve.accumulatedDonation(), sendAmount / 2);
assertEq(aliceAddress.balance, 0);
vm.prank(aliceAddress);
reserve.burn(balance);
assertEq(reserve.totalSupply(), 0);
assertEq(reserve.balanceOf(aliceAddress), 0);
assertEq(reserve.accumulatedDonation(), sendAmount / 2);
assertEq(aliceAddress.balance, sendAmount / 2);
}
function test_burn_multipleUsersAccumulateInTotal() public {
vm.prank(initializer);
reserve.changeDonationRate(5 * 1e4); // 50%
deal(aliceAddress, sendAmount);
vm.prank(aliceAddress);
reserve.mint{ value: sendAmount }(aliceAddress);
vm.prank(initializer);
reserve.changeRate(conversionRate * 9);
deal(bobAddress, sendAmount);
vm.prank(bobAddress);
reserve.mint{ value: sendAmount }(bobAddress);
assertEq(aliceAddress.balance, 0);
assertEq(bobAddress.balance, 0);
uint256 aliceBalance = reserve.balanceOf(aliceAddress);
uint256 bobBalance = reserve.balanceOf(bobAddress);
uint256 bobEstimation = reserve.estimateAmount(bobBalance);
uint256 aliceEstimation = reserve.estimateAmount(aliceBalance);
vm.prank(bobAddress);
reserve.burn(bobBalance);
vm.prank(aliceAddress);
reserve.burn(aliceBalance);
assertEq(bobAddress.balance, sendAmount * 9 / 10);
assertEq(bobAddress.balance, bobEstimation);
assertEq(aliceAddress.balance, sendAmount / 10);
assertEq(aliceAddress.balance, aliceEstimation);
assertEq(reserve.totalSupply(), 0);
assertEq(reserve.accumulatedDonation(), sendAmount);
assertEq(address(reserve).balance, sendAmount);
}
} }