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- Contract name:
- Airdrop
- Optimization enabled
- false
- Compiler version
- v0.6.12+commit.27d51765
- EVM Version
- default
- Verified at
- 2022-10-27T15:07:00.498690Z
Contract source code
// SPDX-License-Identifier: No License (None)
pragma solidity ^0.6.9;
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*
* Source https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/v2.1.3/contracts/ownership/Ownable.sol
* This contract is copied here and renamed from the original to avoid clashes in the compiled artifacts
* when the user imports a zos-lib contract (that transitively causes this contract to be compiled and added to the
* build/artifacts folder) as well as the vanilla Ownable implementation from an openzeppelin version.
*/
contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor () internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @return the address of the owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(),"Not Owner");
_;
}
/**
* @return true if `msg.sender` is the owner of the contract.
*/
function isOwner() public view returns (bool) {
return msg.sender == _owner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0),"Zero address not allowed");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface IERC20 {
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function transfer(address recipient, uint256 amount) external returns (bool);
function mint(address to, uint256 amount) external returns (bool);
}
contract Airdrop is Ownable {
address public signer;
mapping (address => mapping(address => bool)) public isReceived; // token => user => isReceived
mapping (address => uint256) public dropAmount; // token => amount of token to drop
event SetSigner(address signer);
event SetDropAmount(address token, uint256 dropAmount);
function setSigner(address _address) external onlyOwner returns(bool) {
signer = _address;
emit SetSigner(_address);
return true;
}
function setDropAmount(address _token, uint256 _dropAmount) external onlyOwner returns(bool) {
dropAmount[_token] = _dropAmount;
emit SetDropAmount(_token, _dropAmount);
return true;
}
function faucet(address token, bytes32 r, bytes32 s, uint8 v) external returns(bool){
require(signer == ecrecover(keccak256(abi.encodePacked(token, msg.sender, dropAmount[token])), v, r, s), "ECDSA signature is not valid.");
require(!isReceived[token][msg.sender], "Tokens already received");
isReceived[token][msg.sender] == true;
IERC20(token).mint(msg.sender, dropAmount[token]);
return true;
}
function airdrop(address token, uint256 amount, address[] calldata recipients) external onlyOwner returns(bool) {
for (uint i = 0; i < recipients.length; i++) {
IERC20(token).transfer(recipients[i], amount);
}
return true;
}
function airdrop2(address token, uint256[] calldata amounts, address[] calldata recipients) external onlyOwner returns(bool) {
require(amounts.length == recipients.length);
for (uint i = 0; i < recipients.length; i++) {
IERC20(token).transfer(recipients[i], amounts[i]);
}
return true;
}
}
Contract ABI
[{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"SetDropAmount","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"dropAmount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"SetSigner","inputs":[{"type":"address","name":"signer","internalType":"address","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"airdrop","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"address[]","name":"recipients","internalType":"address[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"airdrop2","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"uint256[]","name":"amounts","internalType":"uint256[]"},{"type":"address[]","name":"recipients","internalType":"address[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"dropAmount","inputs":[{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"faucet","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"bytes32","name":"r","internalType":"bytes32"},{"type":"bytes32","name":"s","internalType":"bytes32"},{"type":"uint8","name":"v","internalType":"uint8"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isOwner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isReceived","inputs":[{"type":"address","name":"","internalType":"address"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"setDropAmount","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"uint256","name":"_dropAmount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"setSigner","inputs":[{"type":"address","name":"_address","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"signer","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]}]
Deployed ByteCode
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