Donau Testnet

Contract

0xc5092F04f02f0848521B5C33Cb95C76265a3023D

Overview

BTT Balance

Bittorent Chain LogoBittorent Chain LogoBittorent Chain Logo0 BTT

Multichain Info

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Transaction Hash
Method
Block
From
To
Value
Approve81269062022-06-09 17:14:49718 days ago1654794889IN
0xc5092F04...265a3023D
0 BTT13.9098300,000
Transfer80439132022-06-07 12:33:15721 days ago1654605195IN
0xc5092F04...265a3023D
0 BTT15.4746300,000
Transfer78776472022-06-03 3:00:11725 days ago1654225211IN
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0 BTT15.4782300,000
Transfer78762762022-06-03 2:08:45725 days ago1654222125IN
0xc5092F04...265a3023D
0 BTT15.471300,000
Approve77922482022-05-31 19:57:19727 days ago1654027039IN
0xc5092F04...265a3023D
0 BTT13.9098300,000
Transfer77921362022-05-31 19:53:31727 days ago1654026811IN
0xc5092F04...265a3023D
0 BTT15.4782300,000
Approve77457982022-05-30 14:08:35729 days ago1653919715IN
0xc5092F04...265a3023D
0 BTT13.9098300,000
Allocate To76202032022-05-27 14:10:59732 days ago1653660659IN
0xc5092F04...265a3023D
0 BTT10.1565300,000
Allocate To76199402022-05-27 14:01:57732 days ago1653660117IN
0xc5092F04...265a3023D
0 BTT15.2721300,000
0x6080604071548052022-05-16 11:31:55743 days ago1652700715IN
 Contract Creation
0 BTT188.8875300,000

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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x4CeBe90f...0b7AfDD30
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
FaucetToken

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at testnet.bttcscan.com on 2022-05-26
*/

// File: contracts/SafeMath.sol

pragma solidity ^0.5.16;

// From https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/Math.sol
// Subject to the MIT license.

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting with custom message on overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, errorMessage);

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot underflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction underflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot underflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, errorMessage);

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers.
     * Reverts on division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers.
     * Reverts with custom message on division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: tests/Contracts/ERC20.sol

pragma solidity ^0.5.16;


interface ERC20Base {
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Transfer(address indexed from, address indexed to, uint256 value);
    function totalSupply() external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 value) external returns (bool);
    function balanceOf(address who) external view returns (uint256);
}

contract ERC20 is ERC20Base {
    function transfer(address to, uint256 value) external returns (bool);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

contract ERC20NS is ERC20Base {
    function transfer(address to, uint256 value) external;
    function transferFrom(address from, address to, uint256 value) external;
}

/**
 * @title Standard ERC20 token
 * @dev Implementation of the basic standard token.
 *  See https://github.com/ethereum/EIPs/issues/20
 */
contract StandardToken is ERC20 {
    using SafeMath for uint256;

    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 public totalSupply;
    mapping (address => mapping (address => uint256)) public allowance;
    mapping(address => uint256) public balanceOf;

    constructor(uint256 _initialAmount, string memory _tokenName, uint8 _decimalUnits, string memory _tokenSymbol) public {
        totalSupply = _initialAmount;
        balanceOf[msg.sender] = _initialAmount;
        name = _tokenName;
        symbol = _tokenSymbol;
        decimals = _decimalUnits;
    }

    function transfer(address dst, uint256 amount) external returns (bool) {
        balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount, "Insufficient balance");
        balanceOf[dst] = balanceOf[dst].add(amount, "Balance overflow");
        emit Transfer(msg.sender, dst, amount);
        return true;
    }

    function transferFrom(address src, address dst, uint256 amount) external returns (bool) {
        allowance[src][msg.sender] = allowance[src][msg.sender].sub(amount, "Insufficient allowance");
        balanceOf[src] = balanceOf[src].sub(amount, "Insufficient balance");
        balanceOf[dst] = balanceOf[dst].add(amount, "Balance overflow");
        emit Transfer(src, dst, amount);
        return true;
    }

    function approve(address _spender, uint256 amount) external returns (bool) {
        allowance[msg.sender][_spender] = amount;
        emit Approval(msg.sender, _spender, amount);
        return true;
    }
}

/**
 * @title Non-Standard ERC20 token
 * @dev Version of ERC20 with no return values for `transfer` and `transferFrom`
 *  See https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca
 */
contract NonStandardToken is ERC20NS {
    using SafeMath for uint256;

    string public name;
    uint8 public decimals;
    string public symbol;
    uint256 public totalSupply;
    mapping (address => mapping (address => uint256)) public allowance;
    mapping(address => uint256) public balanceOf;

    constructor(uint256 _initialAmount, string memory _tokenName, uint8 _decimalUnits, string memory _tokenSymbol) public {
        totalSupply = _initialAmount;
        balanceOf[msg.sender] = _initialAmount;
        name = _tokenName;
        symbol = _tokenSymbol;
        decimals = _decimalUnits;
    }

    function transfer(address dst, uint256 amount) external {
        balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount, "Insufficient balance");
        balanceOf[dst] = balanceOf[dst].add(amount, "Balance overflow");
        emit Transfer(msg.sender, dst, amount);
    }

    function transferFrom(address src, address dst, uint256 amount) external {
        allowance[src][msg.sender] = allowance[src][msg.sender].sub(amount, "Insufficient allowance");
        balanceOf[src] = balanceOf[src].sub(amount, "Insufficient balance");
        balanceOf[dst] = balanceOf[dst].add(amount, "Balance overflow");
        emit Transfer(src, dst, amount);
    }

    function approve(address _spender, uint256 amount) external returns (bool) {
        allowance[msg.sender][_spender] = amount;
        emit Approval(msg.sender, _spender, amount);
        return true;
    }
}

contract ERC20Harness is StandardToken {
    // To support testing, we can specify addresses for which transferFrom should fail and return false
    mapping (address => bool) public failTransferFromAddresses;

    // To support testing, we allow the contract to always fail `transfer`.
    mapping (address => bool) public failTransferToAddresses;

    constructor(uint256 _initialAmount, string memory _tokenName, uint8 _decimalUnits, string memory _tokenSymbol) public
        StandardToken(_initialAmount, _tokenName, _decimalUnits, _tokenSymbol) {}

    function harnessSetFailTransferFromAddress(address src, bool _fail) public {
        failTransferFromAddresses[src] = _fail;
    }

    function harnessSetFailTransferToAddress(address dst, bool _fail) public {
        failTransferToAddresses[dst] = _fail;
    }

    function harnessSetBalance(address _account, uint _amount) public {
        balanceOf[_account] = _amount;
    }

    function transfer(address dst, uint256 amount) external returns (bool success) {
        // Added for testing purposes
        if (failTransferToAddresses[dst]) {
            return false;
        }
        balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount, "Insufficient balance");
        balanceOf[dst] = balanceOf[dst].add(amount, "Balance overflow");
        emit Transfer(msg.sender, dst, amount);
        return true;
    }

    function transferFrom(address src, address dst, uint256 amount) external returns (bool success) {
        // Added for testing purposes
        if (failTransferFromAddresses[src]) {
            return false;
        }
        allowance[src][msg.sender] = allowance[src][msg.sender].sub(amount, "Insufficient allowance");
        balanceOf[src] = balanceOf[src].sub(amount, "Insufficient balance");
        balanceOf[dst] = balanceOf[dst].add(amount, "Balance overflow");
        emit Transfer(src, dst, amount);
        return true;
    }
}

// File: tests/Contracts/FaucetToken.sol

pragma solidity ^0.5.16;


/**
 * @title The Aquarius Faucet Test Token
 * @author Aquarius
 * @notice A simple test token that lets anyone get more of it.
 */
contract FaucetToken is StandardToken {
    constructor(uint256 _initialAmount, string memory _tokenName, uint8 _decimalUnits, string memory _tokenSymbol) public
        StandardToken(_initialAmount, _tokenName, _decimalUnits, _tokenSymbol) {
    }

    function allocateTo(address _owner, uint256 value) public {
        balanceOf[_owner] += value;
        totalSupply += value;
        emit Transfer(address(this), _owner, value);
    }
}

/**
 * @title The Aquarius Faucet Test Token (non-standard)
 * @author Aquarius
 * @notice A simple test token that lets anyone get more of it.
 */
contract FaucetNonStandardToken is NonStandardToken {
    constructor(uint256 _initialAmount, string memory _tokenName, uint8 _decimalUnits, string memory _tokenSymbol) public
        NonStandardToken(_initialAmount, _tokenName, _decimalUnits, _tokenSymbol) {
    }

    function allocateTo(address _owner, uint256 value) public {
        balanceOf[_owner] += value;
        totalSupply += value;
        emit Transfer(address(this), _owner, value);
    }
}

/**
 * @title The Aquarius Faucet Re-Entrant Test Token
 * @author Aquarius
 * @notice A test token that is malicious and tries to re-enter callers
 */
contract FaucetTokenReEntrantHarness {
    using SafeMath for uint256;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 totalSupply_;
    mapping (address => mapping (address => uint256)) allowance_;
    mapping (address => uint256) balanceOf_;

    bytes public reEntryCallData;
    string public reEntryFun;

    constructor(uint256 _initialAmount, string memory _tokenName, uint8 _decimalUnits, string memory _tokenSymbol, bytes memory _reEntryCallData, string memory _reEntryFun) public {
        totalSupply_ = _initialAmount;
        balanceOf_[msg.sender] = _initialAmount;
        name = _tokenName;
        symbol = _tokenSymbol;
        decimals = _decimalUnits;
        reEntryCallData = _reEntryCallData;
        reEntryFun = _reEntryFun;
    }

    modifier reEnter(string memory funName) {
        string memory _reEntryFun = reEntryFun;
        if (compareStrings(_reEntryFun, funName)) {
            reEntryFun = ""; // Clear re-entry fun
            (bool success, bytes memory returndata) = msg.sender.call(reEntryCallData);
            assembly {
                if eq(success, 0) {
                    revert(add(returndata, 0x20), returndatasize())
                }
            }
        }

        _;
    }

    function compareStrings(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(abi.encodePacked((a))) == keccak256(abi.encodePacked((b)));
    }

    function allocateTo(address _owner, uint256 value) public {
        balanceOf_[_owner] += value;
        totalSupply_ += value;
        emit Transfer(address(this), _owner, value);
    }

    function totalSupply() public reEnter("totalSupply") returns (uint256) {
        return totalSupply_;
    }

    function allowance(address owner, address spender) public reEnter("allowance") returns (uint256 remaining) {
        return allowance_[owner][spender];
    }

    function approve(address spender, uint256 amount) public reEnter("approve") returns (bool success) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function balanceOf(address owner) public reEnter("balanceOf") returns (uint256 balance) {
        return balanceOf_[owner];
    }

    function transfer(address dst, uint256 amount) public reEnter("transfer") returns (bool success) {
        _transfer(msg.sender, dst, amount);
        return true;
    }

    function transferFrom(address src, address dst, uint256 amount) public reEnter("transferFrom") returns (bool success) {
        _transfer(src, dst, amount);
        _approve(src, msg.sender, allowance_[src][msg.sender].sub(amount));
        return true;
    }

    function _approve(address owner, address spender, uint256 amount) internal {
        require(spender != address(0));
        require(owner != address(0));
        allowance_[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _transfer(address src, address dst, uint256 amount) internal {
        require(dst != address(0));
        balanceOf_[src] = balanceOf_[src].sub(amount);
        balanceOf_[dst] = balanceOf_[dst].add(amount);
        emit Transfer(src, dst, amount);
    }
}

Contract ABI

[{"inputs":[{"internalType":"uint256","name":"_initialAmount","type":"uint256"},{"internalType":"string","name":"_tokenName","type":"string"},{"internalType":"uint8","name":"_decimalUnits","type":"uint8"},{"internalType":"string","name":"_tokenSymbol","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"constant":false,"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"allocateTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"dst","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"src","type":"address"},{"internalType":"address","name":"dst","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]

Deployed Bytecode

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Swarm Source

bzzr://ae82106ebf470d9e168aad5b2b44afce85b47b8ccd44a319a64d7e03e242a9f9

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.