Contract 0x9b02dd390a603add5c07f9fd9175b7dabe8d63b7

 
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0x3ad2f46ac54426a8921bfa81ee23cb388fec582fd090ed201564531c0e339d5c(pending)2021-04-11 9:20:502 secs ago0xf0eaf0c77c1362ad4de668755be5559eb47cfb9f IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0x4b00ab44e17815d0f1761526fbc8ddc1a213f1a468bde0f2be2d09b6988e4d0f(pending)2021-04-11 8:19:311 hr 1 min ago0xa9b9bbef6f32e9e36d2abb45c9872ecbfaf261d2 IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0x80cd6eab1a907cdafc3158f764221ad851e28464df3cb91ff12774a6ba342213(pending)2021-04-11 7:35:131 hr 45 mins ago0x2241f709ca3a3c6e12dd93a1f14f23b7958b07a2 IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0x6133234ff4ee732dab7a31fa049e04af501b38938649f29c16a299da003ed6b5(pending)2021-04-11 7:03:052 hrs 17 mins ago0x3d977ef4855a526500e901bfa43c209e0c51ba84 IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0xbed16269ef38e1a8854fd5f69130f6916773d8e1b8d3f88bb71e90b77fe3d1b4(pending)2021-04-11 6:20:433 hrs ago0x7ed09731167e9994ebedaed938317f3f47885e1c IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0xdaa9f168dc2166e90d17c58ac34b278599b984123c43ed07a81bd0928fd6f21c(pending)2021-04-11 6:20:433 hrs ago0x7ed09731167e9994ebedaed938317f3f47885e1c IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0xd5651f1b1d2fccd189070511173e969a89764b6fe6a4ff085bd45e06f9555e2f(pending)2021-04-11 2:16:377 hrs 4 mins ago0x139f2ca0bb3a23e9f573f11db10c3c9261af20e5 IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0x305254cb82d5a51dd744eedde3759223922c3f66cf26c5efffbccc7ea0920e9c(pending)2021-04-11 1:27:297 hrs 53 mins ago0xff329db4fae0e5f95dece7c6481bc21859f6d50d IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0xbb1018a26544fc46d3e49d713102ac4ae7a2199b6df111e4abc6da468d87733a(pending)2021-04-11 1:26:337 hrs 54 mins ago0x1f25467ea4a2e9583b5af9a90d4a0661d8d0e700 IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0x829b9ad687abaae1ec5dfaf996ffe205c7bd96d285934200d9912d8735b05b8e(pending)2021-04-11 1:23:257 hrs 57 mins ago0xf760030b6958ec84552264ceb3cb80fb8eac8906 IN Shopping.io: SPI Token0 Ether(Pending)(Pending)
0xd54832db4becd7cf5e267cf1b96ab15cc47c1945b06db66c40f60083f54b0176122177752021-04-11 9:20:3121 secs ago0x666666a0200c2b78eddd1ef279488c6a714f010d IN  Shopping.io: SPI Token0 Ether0.00325032573
0x6d62689467f448455a83939ea27de80d297b233c75646b66c3fc83e629c30083122177742021-04-11 9:20:0943 secs ago0xf0eaf0c77c1362ad4de668755be5559eb47cfb9f IN  Shopping.io: SPI Token0 Ether0.004384988485.2
0x5062521c428f84c639c89bc7b64a3afd4e5a0513cebcf81a45cb3027c0745819122177722021-04-11 9:19:521 min ago0xdf8efb8a522561ea9bd8c55874dca4536ee5c618 IN  Shopping.io: SPI Token0 Ether0.004889794134
0x9515d0d658c804c311c1d53c72425b9d7257cae1c9831ab8824ef0979fd91f75122177702021-04-11 9:19:291 min ago0xf0eaf0c77c1362ad4de668755be5559eb47cfb9f IN  Shopping.io: SPI Token0 Ether0.0030719800884.24
0xd70a131891f0023aa7774092b05fc3940c9d8c7f2d52c20debfc3cb61507e903122177562021-04-11 9:17:013 mins ago0xa209d798c72a3190a68ba2f642bc5af96ab10cc6 IN  Shopping.io: SPI Token0 Ether0.00307222569
0xe49cd8348ee0fd1120eb4bb8f9f08a34f0b7b4b8c30165b18a4b8152c20afab4122177442021-04-11 9:14:226 mins agoKuCoin 3 IN  Shopping.io: SPI Token0 Ether0.0031351386
0x365f99a498d2223e58dbf569e950787b407c3b2b8bdb9084880211d2ce4f1b18122177412021-04-11 9:13:277 mins ago0x3a96232db591e2db362e72c69b88c2d19fbe0bb6 IN  Shopping.io: SPI Token0 Ether0.00307222569
0x494d7f50381d7421d54cd67022696eeec6fbca775ff72b459c44f539b430c110122177412021-04-11 9:13:277 mins ago0x7375b8ce325338425365f60adbaefb2f6f313ee6 IN  Shopping.io: SPI Token0 Ether0.00201818169
0xc31d19fc1602b0fa12c0b499de1e0487f3c4e8bb16ad38d9eae7972902b3d946122177192021-04-11 9:09:1311 mins ago0xba2c030dc4790006ae791e98b0c88180e9385d85 IN  Shopping.io: SPI Token0 Ether0.00327531474
0x30c04f506d8c7ad1388485cce88934bc187a8557842d4936914894c5b8be0e3a122177092021-04-11 9:06:1814 mins ago0x83ee00ca834c45fa76755906511ae865dbf030b5 IN  Shopping.io: SPI Token0 Ether0.00340809777
0x0dac3c28d1ef32a2e52c14ed2467f69e056bb561623b48f65cfabf439b00e290122177082021-04-11 9:06:1614 mins ago0x19349473638ab0324516d5d0c05a6476806465c5 IN  Shopping.io: SPI Token0 Ether0.00316127571
0x56dbb28da532c7400087ab1efb3a738ebf2c8cb3ce66462b6fce3ff98049d20e122177072021-04-11 9:06:0714 mins ago0xb06cf1074248861f02085fbd2e3ba0e451027abf IN  Shopping.io: SPI Token0 Ether0.003869222586.9
0x6c6b7be36473ac4d809f893e6eb3928d22e6760f14657f2b76ea88d4864814ac122177042021-04-11 9:05:3115 mins ago0x0e69abfc69b9e80bbb537cd5533a9aee4ba5199f IN  Shopping.io: SPI Token0 Ether0.00169494579
0x48cf367a3d07d1ff7cbf0dc8cd58bc5f011113aafbaea2829a8bec122a7f5aee122176982021-04-11 9:03:4917 mins ago0xec9e1532039ee5f1fd324d657ff650b16a988230 IN  Shopping.io: SPI Token0 Ether0.00331957575
0xa47a7ad60e533d74087f17643833295002caee99c0b0138a09557c326cc37a50122176812021-04-11 9:00:1120 mins ago0xc26515fe9e9216fbee4b823153109d29faeccd50 IN  Shopping.io: SPI Token0 Ether0.004020509978.1
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OVERVIEW

Shopping.io is a state of the art platform that unifies all major eCommerce platforms, allowing consumers to enjoy online shopping seamlessly, securely, and cost-effectively.

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Contract Source Code Verified (Exact Match)

Contract Name:
ShoppingIO

Compiler Version
v0.7.5+commit.eb77ed08

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, MIT license, Audited

Contract Source Code (Solidity)Audit Report

/**
 *Submitted for verification at Etherscan.io on 2020-12-03
*/

// File: @openzeppelin/contracts/GSN/Context.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.7.5;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol


/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

/**
 * @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);
}

// File: @openzeppelin/contracts/math/SafeMath.sol

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

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    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 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) {
        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: @openzeppelin/contracts/token/ERC20/ERC20.sol



/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal {
        _decimals = decimals_;
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}

// File: @openzeppelin/contracts/token/ERC20/ERC20Capped.sol

/**
 * @dev Extension of {ERC20} that adds a cap to the supply of tokens.
 */
abstract contract ERC20Capped is ERC20 {
    using SafeMath for uint256;

    uint256 private _cap;

    /**
     * @dev Sets the value of the `cap`. This value is immutable, it can only be
     * set once during construction.
     */
    constructor (uint256 cap_) {
        require(cap_ > 0, "ERC20Capped: cap is 0");
        _cap = cap_;
    }

    /**
     * @dev Returns the cap on the token's total supply.
     */
    function cap() public view returns (uint256) {
        return _cap;
    }

    /**
     * @dev See {ERC20-_beforeTokenTransfer}.
     *
     * Requirements:
     *
     * - minted tokens must not cause the total supply to go over the cap.
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
        super._beforeTokenTransfer(from, to, amount);

        if (from == address(0)) { // When minting tokens
            require(totalSupply().add(amount) <= _cap, "ERC20Capped: cap exceeded");
        }
    }
}


// File: contracts/token/ERC20/behaviours/ERC20Mintable.sol

/**
 * @title ERC20Mintable
 * @dev Implementation of the ERC20Mintable. Extension of {ERC20} that adds a minting behaviour.
 */
abstract contract ERC20Mintable is ERC20 {

    // indicates if minting is finished
    bool private _mintingFinished = false;

    /**
     * @dev Emitted during finish minting
     */
    event MintFinished();

    /**
     * @dev Tokens can be minted only before minting finished.
     */
    modifier canMint() {
        require(!_mintingFinished, "ERC20Mintable: minting is finished");
        _;
    }

    /**
     * @return if minting is finished or not.
     */
    function mintingFinished() public view returns (bool) {
        return _mintingFinished;
    }

    /**
     * @dev Function to mint tokens.
     *
     * WARNING: it allows everyone to mint new tokens. Access controls MUST be defined in derived contracts.
     *
     * @param account The address that will receive the minted tokens
     * @param amount The amount of tokens to mint
     */
    function mint(address account, uint256 amount) public canMint {
        _mint(account, amount);
    }

    /**
     * @dev Function to stop minting new tokens.
     *
     * WARNING: it allows everyone to finish minting. Access controls MUST be defined in derived contracts.
     */
    function finishMinting() public canMint {
        _finishMinting();
    }

    /**
     * @dev Function to stop minting new tokens.
     */
    function _finishMinting() internal virtual {
        _mintingFinished = true;

        emit MintFinished();
    }
}


/**
 * @title ShoppingIO
 * @dev Implementation of the ShoppingIO
 */
contract ShoppingIO is ERC20Capped, ERC20Mintable, Ownable {

    constructor (
        string memory name,
        string memory symbol,
        uint8 decimals,
        uint256 cap,
        uint256 initialBalance
    )
        ERC20(name, symbol)
        ERC20Capped(cap)
    {
        _setupDecimals(decimals);
        _mint(_msgSender(), initialBalance);
    }

    /**
     * @dev Function to mint tokens.
     *
     * NOTE: restricting access to owner only. See {ERC20Mintable-mint}.
     *
     * @param account The address that will receive the minted tokens
     * @param amount The amount of tokens to mint
     */
    function _mint(address account, uint256 amount) internal override onlyOwner {
        super._mint(account, amount);
    }

    /**
     * @dev Function to stop minting new tokens.
     *
     * NOTE: restricting access to owner only. See {ERC20Mintable-finishMinting}.
     */
    function _finishMinting() internal override onlyOwner {
        super._finishMinting();
    }

    /**
     * @dev See {ERC20-_beforeTokenTransfer}. See {ERC20Capped-_beforeTokenTransfer}.
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal override(ERC20, ERC20Capped) {
        super._beforeTokenTransfer(from, to, amount);
    }
}

Contract Security Audit

Contract ABI

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

00000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000d3c21bcecceda10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000b53686f7070696e672e696f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000035350490000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : name (string): Shopping.io
Arg [1] : symbol (string): SPI
Arg [2] : decimals (uint8): 18
Arg [3] : cap (uint256): 1000000000000000000000000
Arg [4] : initialBalance (uint256): 0

-----Encoded View---------------
9 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [3] : 00000000000000000000000000000000000000000000d3c21bcecceda1000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [5] : 000000000000000000000000000000000000000000000000000000000000000b
Arg [6] : 53686f7070696e672e696f000000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [8] : 5350490000000000000000000000000000000000000000000000000000000000


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://65c2f35587cf754f91653780a67f0198e7b82981e7419adea56424562cdb3c1f
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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