TOKEN-BEP20

pragma solidity 0.5.16; interface IBEP20 { /** * @dev Returns the amount of tokens in existence. / function totalSupply() external view returns (uint256); /* * @dev Returns the token decimals. / function decimals() external view returns (uint8); /* * @dev Returns the token symbol. / function symbol() external view returns (string memory); /* * @dev Returns the token name. / function name() external view returns (string memory); /* * @dev Returns the bep token owner. / function getOwner() external view returns (address); /* * @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: * ethereum/EIPs#20 (comment) * * 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); } / * @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. / contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see ethereum/solidity#2691 return msg.data; } } /* * @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: OpenZeppelin/openzeppelin-contracts#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) { // 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; } } /* * @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. / 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 () internal { 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 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 onlyOwner { _transferOwnership(newOwner); } /* * @dev Transfers ownership of the contract to a new account (newOwner). / function _transferOwnership(address newOwner) internal { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract BEP20Token is Context, IBEP20, Ownable { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; uint8 private _decimals; string private _symbol; string private _name; constructor() public { _name = "Cardano Lite"; _symbol = "ADALITE"; _decimals = 9; _totalSupply = 100000010*18 ; _balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } /** * @dev Returns the bep token owner. / function getOwner() external view returns (address) { return owner(); } /* * @dev Returns the token decimals. / function decimals() external view returns (uint8) { return _decimals; } /* * @dev Returns the token symbol. / function symbol() external view returns (string memory) { return _symbol; } /* * @dev Returns the token name. / function name() external view returns (string memory) { return _name; } /* * @dev See {BEP20-totalSupply}. / function totalSupply() external view returns (uint256) { return _totalSupply; } /* * @dev See {BEP20-balanceOf}. / function balanceOf(address account) external view returns (uint256) { return _balances[account]; } /* * @dev See {BEP20-transfer}. * * Requirements: * * - recipient cannot be the zero address. * - the caller must have a balance of at least amount. / function transfer(address recipient, uint256 amount) external returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /* * @dev See {BEP20-allowance}. / function allowance(address owner, address spender) external view returns (uint256) { return _allowances[owner][spender]; } /* * @dev See {BEP20-approve}. * * Requirements: * * - spender cannot be the zero address. / function approve(address spender, uint256 amount) external returns (bool) { _approve(_msgSender(), spender, amount); return true; } /* * @dev See {BEP20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {BEP20}; * * 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) external returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: 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 {BEP20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - spender cannot be the zero address. / function increaseAllowance(address spender, uint256 addedValue) public 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 {BEP20-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 returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero")); return true; } /* * @dev Creates amount tokens and assigns them to msg.sender, increasing * the total supply. * * Requirements * * - msg.sender must be the token owner / function mint(uint256 amount) public onlyOwner returns (bool) { _mint(_msgSender(), amount); 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 { require(sender != address(0), "BEP20: transfer from the zero address"); require(recipient != address(0), "BEP20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "BEP20: 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 { require(account != address(0), "BEP20: mint to the zero address"); _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 { require(account != address(0), "BEP20: burn from the zero address"); _balances[account] = _balances[account].sub(amount, "BEP20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /* * @dev Sets amount as the allowance of spender over the owners tokens. * * This is 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 { require(owner != address(0), "BEP20: approve from the zero address"); require(spender != address(0), "BEP20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /* * @dev Destroys amount tokens from account.amount is then deducted * from the caller's allowance. * * See {_burn} and {_approve}. */ function _burnFrom(address account, uint256 amount) internal { _burn(account, amount); _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "BEP20: burn amount exceeds allowance")); } }