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pragma solidity ^0.6.12; |
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// SPDX-License-Identifier: Unlicensed |
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interface IBEP20 { |
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/** |
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* @dev Returns the amount of tokens in existence. |
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*/ |
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function totalSupply() external view returns (uint256); |
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/** |
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* @dev Returns the token decimals. |
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*/ |
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function decimals() external view returns (uint8); |
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/** |
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* @dev Returns the token symbol. |
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*/ |
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function symbol() external view returns (string memory); |
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/** |
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* @dev Returns the token name. |
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*/ |
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function name() external view returns (string memory); |
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/** |
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* @dev Returns the bep token owner. |
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*/ |
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function getOwner() external view returns (address); |
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/** |
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* @dev Returns the amount of tokens owned by `account`. |
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*/ |
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function balanceOf(address account) external view returns (uint256); |
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/** |
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* @dev Moves `amount` tokens from the caller's account to `recipient`. |
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* |
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* Returns a boolean value indicating whether the operation succeeded. |
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* |
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* Emits a {Transfer} event. |
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*/ |
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function transfer(address recipient, uint256 amount) external returns (bool); |
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/** |
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* @dev Returns the remaining number of tokens that `spender` will be |
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* allowed to spend on behalf of `owner` through {transferFrom}. This is |
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* zero by default. |
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* |
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* This value changes when {approve} or {transferFrom} are called. |
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*/ |
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function allowance(address _owner, address spender) external view returns (uint256); |
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/** |
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* @dev Sets `amount` as the allowance of `spender` over the caller's tokens. |
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* |
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* Returns a boolean value indicating whether the operation succeeded. |
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* |
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* IMPORTANT: Beware that changing an allowance with this method brings the risk |
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* that someone may use both the old and the new allowance by unfortunate |
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* transaction ordering. One possible solution to mitigate this race |
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* condition is to first reduce the spender's allowance to 0 and set the |
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* desired value afterwards: |
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* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 |
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* |
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* Emits an {Approval} event. |
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*/ |
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function approve(address spender, uint256 amount) external returns (bool); |
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/** |
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* @dev Moves `amount` tokens from `sender` to `recipient` using the |
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* allowance mechanism. `amount` is then deducted from the caller's |
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* allowance. |
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* |
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* Returns a boolean value indicating whether the operation succeeded. |
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* |
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* Emits a {Transfer} event. |
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*/ |
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function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); |
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/** |
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* @dev Emitted when `value` tokens are moved from one account (`from`) to |
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* another (`to`). |
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* |
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* Note that `value` may be zero. |
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*/ |
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event Transfer(address indexed from, address indexed to, uint256 value); |
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/** |
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* @dev Emitted when the allowance of a `spender` for an `owner` is set by |
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* a call to {approve}. `value` is the new allowance. |
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*/ |
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event Approval(address indexed owner, address indexed spender, uint256 value); |
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} |
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/* |
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* @dev Provides information about the current execution context, including the |
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* sender of the transaction and its data. While these are generally available |
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* via msg.sender and msg.data, they should not be accessed in such a direct |
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* manner, since when dealing with GSN meta-transactions the account sending and |
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* paying for execution may not be the actual sender (as far as an application |
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* is concerned). |
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* |
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* This contract is only required for intermediate, library-like contracts. |
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*/ |
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contract Context { |
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// Empty internal constructor, to prevent people from mistakenly deploying |
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// an instance of this contract, which should be used via inheritance. |
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constructor () internal { } |
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function _msgSender() internal view returns (address payable) { |
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return msg.sender; |
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} |
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function _msgData() internal view returns (bytes memory) { |
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this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 |
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return msg.data; |
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} |
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} |
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/** |
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* @dev Wrappers over Solidity's arithmetic operations with added overflow |
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* checks. |
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* |
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* Arithmetic operations in Solidity wrap on overflow. This can easily result |
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* in bugs, because programmers usually assume that an overflow raises an |
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* error, which is the standard behavior in high level programming languages. |
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* `SafeMath` restores this intuition by reverting the transaction when an |
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* operation overflows. |
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* |
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* Using this library instead of the unchecked operations eliminates an entire |
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* class of bugs, so it's recommended to use it always. |
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*/ |
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library SafeMath { |
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/** |
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* @dev Returns the addition of two unsigned integers, reverting on |
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* overflow. |
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* |
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* Counterpart to Solidity's `+` operator. |
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* |
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* Requirements: |
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* - Addition cannot overflow. |
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*/ |
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function add(uint256 a, uint256 b) internal pure returns (uint256) { |
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uint256 c = a + b; |
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require(c >= a, "SafeMath: addition overflow"); |
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return c; |
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} |
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/** |
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* @dev Returns the subtraction of two unsigned integers, reverting on |
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* overflow (when the result is negative). |
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* |
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* Counterpart to Solidity's `-` operator. |
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* |
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* Requirements: |
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* - Subtraction cannot overflow. |
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*/ |
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function sub(uint256 a, uint256 b) internal pure returns (uint256) { |
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return sub(a, b, "SafeMath: subtraction overflow"); |
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} |
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/** |
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* @dev Returns the subtraction of two unsigned integers, reverting with custom message on |
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* overflow (when the result is negative). |
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* |
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* Counterpart to Solidity's `-` operator. |
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* |
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* Requirements: |
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* - Subtraction cannot overflow. |
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*/ |
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function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { |
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require(b <= a, errorMessage); |
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uint256 c = a - b; |
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return c; |
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} |
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/** |
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* @dev Returns the multiplication of two unsigned integers, reverting on |
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* overflow. |
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* |
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* Counterpart to Solidity's `*` operator. |
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* |
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* Requirements: |
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* - Multiplication cannot overflow. |
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*/ |
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function mul(uint256 a, uint256 b) internal pure returns (uint256) { |
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// Gas optimization: this is cheaper than requiring 'a' not being zero, but the |
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// benefit is lost if 'b' is also tested. |
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// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 |
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if (a == 0) { |
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return 0; |
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} |
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uint256 c = a * b; |
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require(c / a == b, "SafeMath: multiplication overflow"); |
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return c; |
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} |
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/** |
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* @dev Returns the integer division of two unsigned integers. Reverts on |
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* division by zero. The result is rounded towards zero. |
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* |
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* Counterpart to Solidity's `/` operator. Note: this function uses a |
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* `revert` opcode (which leaves remaining gas untouched) while Solidity |
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* uses an invalid opcode to revert (consuming all remaining gas). |
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* |
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* Requirements: |
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* - The divisor cannot be zero. |
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*/ |
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function div(uint256 a, uint256 b) internal pure returns (uint256) { |
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return div(a, b, "SafeMath: division by zero"); |
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} |
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/** |
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* @dev Returns the integer division of two unsigned integers. Reverts with custom message on |
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* division by zero. The result is rounded towards zero. |
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* |
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* Counterpart to Solidity's `/` operator. Note: this function uses a |
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* `revert` opcode (which leaves remaining gas untouched) while Solidity |
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* uses an invalid opcode to revert (consuming all remaining gas). |
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* |
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* Requirements: |
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* - The divisor cannot be zero. |
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*/ |
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function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { |
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// Solidity only automatically asserts when dividing by 0 |
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require(b > 0, errorMessage); |
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uint256 c = a / b; |
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// assert(a == b * c + a % b); // There is no case in which this doesn't hold |
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return c; |
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} |
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/** |
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* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), |
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* Reverts when dividing by zero. |
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* |
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* Counterpart to Solidity's `%` operator. This function uses a `revert` |
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* opcode (which leaves remaining gas untouched) while Solidity uses an |
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* invalid opcode to revert (consuming all remaining gas). |
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* |
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* Requirements: |
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* - The divisor cannot be zero. |
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*/ |
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function mod(uint256 a, uint256 b) internal pure returns (uint256) { |
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return mod(a, b, "SafeMath: modulo by zero"); |
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} |
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/** |
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* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), |
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* Reverts with custom message when dividing by zero. |
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* |
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* Counterpart to Solidity's `%` operator. This function uses a `revert` |
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* opcode (which leaves remaining gas untouched) while Solidity uses an |
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* invalid opcode to revert (consuming all remaining gas). |
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* |
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* Requirements: |
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* - The divisor cannot be zero. |
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*/ |
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function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { |
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require(b != 0, errorMessage); |
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return a % b; |
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} |
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} |
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/** |
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* @dev Contract module which provides a basic access control mechanism, where |
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* there is an account (an owner) that can be granted exclusive access to |
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* specific functions. |
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* |
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* By default, the owner account will be the one that deploys the contract. This |
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* can later be changed with {transferOwnership}. |
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* |
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* This module is used through inheritance. It will make available the modifier |
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* `onlyOwner`, which can be applied to your functions to restrict their use to |
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* the owner. |
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*/ |
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contract Ownable is Context { |
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address private _owner; |
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event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); |
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/** |
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* @dev Initializes the contract setting the deployer as the initial owner. |
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*/ |
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constructor () internal { |
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address msgSender = _msgSender(); |
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_owner = msgSender; |
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emit OwnershipTransferred(address(0), msgSender); |
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} |
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/** |
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* @dev Returns the address of the current owner. |
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*/ |
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function owner() public view returns (address) { |
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return _owner; |
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} |
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/** |
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* @dev Throws if called by any account other than the owner. |
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*/ |
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modifier onlyOwner() { |
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require(_owner == _msgSender(), "Ownable: caller is not the owner"); |
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_; |
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} |
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/** |
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* @dev Leaves the contract without owner. It will not be possible to call |
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* `onlyOwner` functions anymore. Can only be called by the current owner. |
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* |
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* NOTE: Renouncing ownership will leave the contract without an owner, |
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* thereby removing any functionality that is only available to the owner. |
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*/ |
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function renounceOwnership() public onlyOwner { |
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emit OwnershipTransferred(_owner, address(0)); |
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_owner = address(0); |
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} |
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/** |
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* @dev Transfers ownership of the contract to a new account (`newOwner`). |
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* Can only be called by the current owner. |
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*/ |
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function transferOwnership(address newOwner) public onlyOwner { |
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_transferOwnership(newOwner); |
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} |
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/** |
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* @dev Transfers ownership of the contract to a new account (`newOwner`). |
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*/ |
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function _transferOwnership(address newOwner) internal { |
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require(newOwner != address(0), "Ownable: new owner is the zero address"); |
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emit OwnershipTransferred(_owner, newOwner); |
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_owner = newOwner; |
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} |
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} |
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contract ShibaCuteToken is Context, IBEP20, Ownable { |
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using SafeMath for uint256; |
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mapping (address => uint256) private _balances; |
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mapping (address => mapping (address => uint256)) private _allowances; |
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uint256 private _totalSupply; |
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uint8 private _decimals; |
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string private _symbol; |
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string private _name; |
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constructor() public { |
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_name = "ShibaCute"; |
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_symbol = "SCUTE"; |
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_decimals = 9; |
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_totalSupply = 1000000000000000000000000000000000; |
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_balances[msg.sender] = _totalSupply; |
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emit Transfer(address(0), msg.sender, _totalSupply); |
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} |
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/** |
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* @dev Returns the bep token owner. |
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*/ |
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function getOwner() external view override returns (address) { |
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return owner(); |
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} |
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/** |
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* @dev Returns the token decimals. |
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*/ |
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function decimals() external view override returns (uint8) { |
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return _decimals; |
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} |
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/** |
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* @dev Returns the token symbol. |
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*/ |
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function symbol() external view override returns (string memory) { |
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return _symbol; |
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} |
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/** |
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* @dev Returns the token name. |
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*/ |
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function name() external view override returns (string memory) { |
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return _name; |
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} |
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/** |
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* @dev See {BEP20-totalSupply}. |
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*/ |
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function totalSupply() external view override returns (uint256) { |
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return _totalSupply; |
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} |
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/** |
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* @dev See {BEP20-balanceOf}. |
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*/ |
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function balanceOf(address account) external view override returns (uint256) { |
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return _balances[account]; |
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} |
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/** |
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* @dev See {BEP20-transfer}. |
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* |
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* Requirements: |
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* |
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* - `recipient` cannot be the zero address. |
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* - the caller must have a balance of at least `amount`. |
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*/ |
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function transfer(address recipient, uint256 amount) external override returns (bool) { |
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_transfer(_msgSender(), recipient, amount); |
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return true; |
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} |
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/** |
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* @dev See {BEP20-allowance}. |
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*/ |
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function allowance(address owner, address spender) external view override returns (uint256) { |
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return _allowances[owner][spender]; |
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} |
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/** |
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* @dev See {BEP20-approve}. |
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* |
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* Requirements: |
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* |
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* - `spender` cannot be the zero address. |
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*/ |
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function approve(address spender, uint256 amount) external override returns (bool) { |
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_approve(_msgSender(), spender, amount); |
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return true; |
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} |
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/** |
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* @dev See {BEP20-transferFrom}. |
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* |
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* Emits an {Approval} event indicating the updated allowance. This is not |
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* required by the EIP. See the note at the beginning of {BEP20}; |
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* |
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* Requirements: |
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* - `sender` and `recipient` cannot be the zero address. |
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* - `sender` must have a balance of at least `amount`. |
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* - the caller must have allowance for `sender`'s tokens of at least |
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* `amount`. |
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*/ |
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function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) { |
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_transfer(sender, recipient, amount); |
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_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: transfer amount exceeds allowance")); |
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return true; |
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} |
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/** |
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* @dev Atomically increases the allowance granted to `spender` by the caller. |
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* |
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* This is an alternative to {approve} that can be used as a mitigation for |
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* problems described in {BEP20-approve}. |
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* |
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* Emits an {Approval} event indicating the updated allowance. |
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* |
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* Requirements: |
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* |
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* - `spender` cannot be the zero address. |
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*/ |
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function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { |
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_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); |
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return true; |
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} |
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/** |
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* @dev Atomically decreases the allowance granted to `spender` by the caller. |
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* |
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* This is an alternative to {approve} that can be used as a mitigation for |
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* problems described in {BEP20-approve}. |
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* |
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* Emits an {Approval} event indicating the updated allowance. |
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* |
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* Requirements: |
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* |
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* - `spender` cannot be the zero address. |
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* - `spender` must have allowance for the caller of at least |
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* `subtractedValue`. |
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*/ |
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function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { |
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_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero")); |
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return true; |
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} |
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/** |
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* @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing |
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* the total supply. |
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* |
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* Requirements |
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* |
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* - `msg.sender` must be the token owner |
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*/ |
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function mint(uint256 amount) public onlyOwner returns (bool) { |
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_mint(_msgSender(), amount); |
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return true; |
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} |
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/** |
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* @dev Moves tokens `amount` from `sender` to `recipient`. |
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* |
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* This is internal function is equivalent to {transfer}, and can be used to |
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* e.g. implement automatic token fees, slashing mechanisms, etc. |
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* |
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* Emits a {Transfer} event. |
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* |
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* Requirements: |
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* |
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* - `sender` cannot be the zero address. |
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* - `recipient` cannot be the zero address. |
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* - `sender` must have a balance of at least `amount`. |
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*/ |
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function _transfer(address sender, address recipient, uint256 amount) internal { |
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require(sender != address(0), "BEP20: transfer from the zero address"); |
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require(recipient != address(0), "BEP20: transfer to the zero address"); |
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_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance"); |
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_balances[recipient] = _balances[recipient].add(amount); |
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emit Transfer(sender, recipient, amount); |
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} |
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/** @dev Creates `amount` tokens and assigns them to `account`, increasing |
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* the total supply. |
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* |
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* Emits a {Transfer} event with `from` set to the zero address. |
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* |
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* Requirements |
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* |
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* - `to` cannot be the zero address. |
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*/ |
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function _mint(address account, uint256 amount) internal { |
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require(account != address(0), "BEP20: mint to the zero address"); |
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_totalSupply = _totalSupply.add(amount); |
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_balances[account] = _balances[account].add(amount); |
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emit Transfer(address(0), account, amount); |
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} |
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/** |
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* @dev Destroys `amount` tokens from `account`, reducing the |
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* total supply. |
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* |
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* Emits a {Transfer} event with `to` set to the zero address. |
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* |
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* Requirements |
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* |
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* - `account` cannot be the zero address. |
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* - `account` must have at least `amount` tokens. |
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*/ |
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function _burn(address account, uint256 amount) internal { |
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require(account != address(0), "BEP20: burn from the zero address"); |
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_balances[account] = _balances[account].sub(amount, "BEP20: burn amount exceeds balance"); |
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_totalSupply = _totalSupply.sub(amount); |
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emit Transfer(account, address(0), amount); |
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} |
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/** |
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* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. |
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* |
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* This is internal function is equivalent to `approve`, and can be used to |
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* e.g. set automatic allowances for certain subsystems, etc. |
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* |
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* Emits an {Approval} event. |
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* |
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* Requirements: |
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* |
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* - `owner` cannot be the zero address. |
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* - `spender` cannot be the zero address. |
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*/ |
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function _approve(address owner, address spender, uint256 amount) internal { |
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require(owner != address(0), "BEP20: approve from the zero address"); |
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require(spender != address(0), "BEP20: approve to the zero address"); |
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_allowances[owner][spender] = amount; |
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emit Approval(owner, spender, amount); |
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} |
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|
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/** |
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* @dev Destroys `amount` tokens from `account`.`amount` is then deducted |
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* from the caller's allowance. |
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* |
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* See {_burn} and {_approve}. |
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*/ |
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function _burnFrom(address account, uint256 amount) internal { |
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_burn(account, amount); |
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_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "BEP20: burn amount exceeds allowance")); |
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} |
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} |