// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;


import "./IERC20.sol";


contract bitcoinFaucet {


    uint256 decimalMultiplier = 100000000; //decimals 8
    address private owner;
    address public tokenAddress;
    address public tokenOwner;
    bool public faucetOpen = true;


    uint256 public limitPerWallet = 50;
    mapping(address => uint256) public claimedByAddress;
   
constructor(address _tokenAddress, address _tokenOwner)  {
        tokenAddress = _tokenAddress;
        tokenOwner = _tokenOwner;
        owner = msg.sender;
    }


function admin_open(bool _faucetOpen) public {
        require(msg.sender == owner, "Restricted operation");
        faucetOpen = _faucetOpen;
    }


function claim(
    ) external {
        require(faucetOpen, "Faucet not open");
        require(claimedByAddress[msg.sender] == 0, "Address already claimed");
        claimedByAddress[msg.sender] = 1;
        require(IERC20(tokenAddress).transferFrom(tokenOwner, msg.sender, (limitPerWallet*decimalMultiplier)), "transfer failed");
    }
function checkAvailableBalance () external view returns (uint256){
            return IERC20(tokenAddress).balanceOf(tokenOwner)/decimalMultiplier;
}
}

{
  "compilationTarget": {
    "bitcoinFaucet.sol": "bitcoinFaucet"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}