Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- CrestFaucetNative
- Optimization enabled
- true
- Compiler version
- v0.8.26+commit.8a97fa7a
- Optimization runs
- 2000
- EVM Version
- paris
- Verified at
- 2025-06-02T15:10:26.242146Z
Contract source code
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// File: contracts/faucet.sol
pragma solidity ^0.8.20;
contract CrestFaucetNative is ReentrancyGuard {
uint256 public amountToSend = 0.01 ether;
uint256 public cooldownTime = 1 days;
mapping(address => uint256) public lastClaimed;
address public owner;
modifier onlyOwner() {
require(msg.sender == owner, "Not owner");
_;
}
constructor() {
owner = msg.sender;
}
function claim() external nonReentrant {
require(block.timestamp - lastClaimed[msg.sender] >= cooldownTime, "Wait 24h");
require(address(this).balance >= amountToSend, "Faucet empty");
lastClaimed[msg.sender] = block.timestamp;
(bool sent, ) = msg.sender.call{value: amountToSend}("");
require(sent, "Transfer failed");
}
function setAmount(uint256 _amount) external onlyOwner {
amountToSend = _amount;
}
function withdraw(address payable to, uint256 amount) external onlyOwner {
require(address(this).balance >= amount, "Insufficient");
(bool sent, ) = to.call{value: amount}("");
require(sent, "Withdraw failed");
}
receive() external payable {}
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"amountToSend","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"claim","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"cooldownTime","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"lastClaimed","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setAmount","inputs":[{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"withdraw","inputs":[{"type":"address","name":"to","internalType":"address payable"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"receive","stateMutability":"payable"}]
Contract Creation Code
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