Donau Testnet

Contract

0x4CeBe90fF9FAE0827Bd3554474de71a0b7AfDD30

Overview

BTT Balance

Bittorent Chain LogoBittorent Chain LogoBittorent Chain Logo0 BTT

Multichain Info

N/A
Transaction Hash
Method
Block
From
To
Amount
Approve104101792022-08-08 12:43:591221 days ago1659962639IN
0x4CeBe90f...0b7AfDD30
0 BTT13.9098300,000
Approve80480002022-06-07 15:08:411283 days ago1654614521IN
0x4CeBe90f...0b7AfDD30
0 BTT13.9098300,000
Transfer80472742022-06-07 14:41:331283 days ago1654612893IN
0x4CeBe90f...0b7AfDD30
0 BTT15.4638300,000
Approve80446652022-06-07 13:01:111283 days ago1654606871IN
0x4CeBe90f...0b7AfDD30
0 BTT13.9098300,000
Transfer80438742022-06-07 12:31:531283 days ago1654605113IN
0x4CeBe90f...0b7AfDD30
0 BTT15.4602300,000
Transfer78776232022-06-03 2:59:191288 days ago1654225159IN
0x4CeBe90f...0b7AfDD30
0 BTT15.4674300,000
Transfer78762962022-06-03 2:09:291288 days ago1654222169IN
0x4CeBe90f...0b7AfDD30
0 BTT10.3302300,000
Transfer78762452022-06-03 2:07:431288 days ago1654222063IN
0x4CeBe90f...0b7AfDD30
0 BTT15.4602300,000
Transfer77921112022-05-31 19:52:371290 days ago1654026757IN
0x4CeBe90f...0b7AfDD30
0 BTT15.4638300,000
Approve77918772022-05-31 19:42:411290 days ago1654026161IN
0x4CeBe90f...0b7AfDD30
0 BTT13.9098300,000
Approve77457272022-05-30 14:06:051291 days ago1653919565IN
0x4CeBe90f...0b7AfDD30
0 BTT13.9098300,000
Approve76213052022-05-27 14:48:511294 days ago1653662931IN
0x4CeBe90f...0b7AfDD30
0 BTT13.9098300,000
Allocate To76198442022-05-27 13:58:411294 days ago1653659921IN
0x4CeBe90f...0b7AfDD30
0 BTT15.2757300,000

Latest 25 internal transactions (View All)

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104542742022-08-09 13:59:451220 days ago1660053585
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104542742022-08-09 13:59:451220 days ago1660053585
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104541072022-08-09 13:53:591220 days ago1660053239
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104541072022-08-09 13:53:591220 days ago1660053239
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104541072022-08-09 13:53:591220 days ago1660053239
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104541072022-08-09 13:53:591220 days ago1660053239
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82626142022-06-13 7:25:311277 days ago1655105131
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82626142022-06-13 7:25:311277 days ago1655105131
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82626142022-06-13 7:25:311277 days ago1655105131
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82625172022-06-13 7:21:491277 days ago1655104909
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Contract Source Code Verified (Exact Match)

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

API
[{"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"}]

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000000000000000000c9f2c9cd04674edea400000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000006555344545f65000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000045553445400000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _initialAmount (uint256): 1000000000000000000000000000000
Arg [1] : _tokenName (string): USDT_e
Arg [2] : _decimalUnits (uint8): 6
Arg [3] : _tokenSymbol (string): USDT

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000c9f2c9cd04674edea40000000
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [3] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [5] : 555344545f650000000000000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [7] : 5553445400000000000000000000000000000000000000000000000000000000


Deployed Bytecode Sourcemap

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Swarm Source

bzzr://ae82106ebf470d9e168aad5b2b44afce85b47b8ccd44a319a64d7e03e242a9f9

Block Transaction Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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0x4CeBe90fF9FAE0827Bd3554474de71a0b7AfDD30
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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.