Contract Source Code (Solidity Multiple files format)

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// SPDX-License-Identifier: MIT
pragma solidity 0.8.10;

import "./IERC20.sol";

contract Faucet {
    //once an address has claimed, it cannot claim anymore
    mapping(address => bool) private _used;
    //the ERC20 to be spent
    IERC20 private _contractAddress;
    //the owner of the generous token provider for this faucet
    address private _tokenOwner;
    //how much tokens we want to spend per claim
    uint256 private _tokensPerClaim;

    event Claim(address claimer, uint256 amount);

    constructor(address contractAddress, address tokenOwner, uint256 tokensPerClaim) {
        _contractAddress = IERC20(contractAddress);
        _tokenOwner = tokenOwner;
        _tokensPerClaim = tokensPerClaim;
    }

    function claim() external {
        require(!_used[msg.sender], "Same address cannot claim twice");
        //send tokens to the one who called this contract
        _contractAddress.transferFrom(_tokenOwner, msg.sender, _tokensPerClaim);
        //mark the address of the one who called this contract,
        //so this address cannot claim again
        _used[msg.sender] = true;
        emit Claim(msg.sender, _tokensPerClaim);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

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[{"inputs":[{"internalType":"address","name":"contractAddress","type":"address"},{"internalType":"address","name":"tokenOwner","type":"address"},{"internalType":"uint256","name":"tokensPerClaim","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"claimer","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Claim","type":"event"},{"inputs":[],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000108a850856db3f85d0269a2693d896b394c8032500000000000000000000000069102b434be1d245961e7a1114b6e49a2d1283f20000000000000000000000000000000000000000000000000de0b6b3a7640000

-----Decoded View---------------
Arg [0] : contractAddress (address): 0x108a850856Db3f85d0269a2693D896B394C80325
Arg [1] : tokenOwner (address): 0x69102B434be1D245961E7a1114b6e49a2d1283f2
Arg [2] : tokensPerClaim (uint256): 1000000000000000000

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000108a850856db3f85d0269a2693d896b394c80325
Arg [1] : 00000000000000000000000069102b434be1d245961e7a1114b6e49a2d1283f2
Arg [2] : 0000000000000000000000000000000000000000000000000de0b6b3a7640000

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ipfs://0c51dcffed474648a1b35a326f3fde44739341bd48267301e02a9203cca16635