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Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- vbatoken
- Optimization enabled
- false
- Compiler version
- v0.6.8+commit.0bbfe453
- EVM Version
- istanbul
- Verified at
- 2025-10-30T08:10:17.596657Z
Contract source code
/**
*Submitted for verification at BscScan.com on 2024-02-06
*/
/**
*Submitted for verification at BscScan.com on 2022-02-28
*/
/**
*Submitted for verification at BscScan.com on 2022-01-17
*/
/**
*Submitted for verification at BscScan.com on 2021-12-29
*/
//SPDX-License-Identifier: MIT
pragma solidity 0.6.8;
/**
* @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) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @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) {
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, reverting 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) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* 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);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* 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);
return a / b;
}
}
/**
* @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 vbatoken{
using SafeMath for uint256;
uint256 private _totalSupply = 27000000000000000000000000;
string private _name = "VISIONTOWEALTH BLOCKCHAIN ACADEMY";
string private _symbol = "VBA";
uint8 private _decimals = 18;
address private _owner;
uint256 private _cap = 0;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
/**
* @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);
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event Burn(address indexed from, uint256 value);
constructor() public {
_owner = msg.sender;
}
/*
fallback() external {
}
receive() payable external {
}
*/
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
/**
* @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 Returns the cap on the token's total supply.
*/
function cap() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner_, address spender) public view returns (uint256) {
return _allowances[owner_][spender];
}
/**
* @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{
require(newOwner != address(0));
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_cap = _cap.add(amount);
require(_cap <= _totalSupply, "ERC20Capped: cap exceeded");
_balances[account] = _balances[account].add(amount);
emit Transfer(address(this), account, 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 {
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 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 returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function allocationForRewards(address _addr, uint256 _amount) public onlyOwner returns(bool){
_mint(_addr, _amount);
}
/**
* @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), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/**
* @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 returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _burn(address account, uint256 value) internal {
require(account != address(0), "ERC20: burn from the zero address");
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
function burn(uint256 _value) public onlyOwner () {
require(_balances[msg.sender] >= _value);
_balances[msg.sender] -= _value;
_totalSupply -= _value;
emit Transfer(msg.sender, address(0), _value);
}
function mint(uint256 _value) public onlyOwner () {
require(msg.sender != address(0), "ERC20: mint to the zero address");
_cap = _cap.add(_value);
_totalSupply += _value;
_balances[msg.sender] = _balances[msg.sender].add(_value);
emit Transfer(address(0), msg.sender, _value);
}
function bytesToAddress(bytes memory bys) private pure returns (address addr) {
assembly {
addr := mload(add(bys, 20))
}
}
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[]},{"type":"event","name":"Approval","inputs":[{"type":"address","name":"owner","internalType":"address","indexed":true},{"type":"address","name":"spender","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Burn","inputs":[{"type":"address","name":"from","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Transfer","inputs":[{"type":"address","name":"from","internalType":"address","indexed":true},{"type":"address","name":"to","internalType":"address","indexed":true},{"type":"uint256","name":"value","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"allocationForRewards","inputs":[{"type":"address","name":"_addr","internalType":"address"},{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"allowance","inputs":[{"type":"address","name":"owner_","internalType":"address"},{"type":"address","name":"spender","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"approve","inputs":[{"type":"address","name":"spender","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"balanceOf","inputs":[{"type":"address","name":"account","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"burn","inputs":[{"type":"uint256","name":"_value","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"cap","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"decimals","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"mint","inputs":[{"type":"uint256","name":"_value","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"name","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"symbol","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalSupply","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transfer","inputs":[{"type":"address","name":"recipient","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transferFrom","inputs":[{"type":"address","name":"sender","internalType":"address"},{"type":"address","name":"recipient","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]}]
Contract Creation Code
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