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MIBToken.sol - Source file
pragma solidity ^0.4.24;
contract DMIBLog {
//because gas price
//event MIBLog(bytes4 indexed sig, address indexed sender, uint _value, bytes _call4) anonymous;
event MIBLog(bytes4 indexed sig, address indexed sender, uint _value) anonymous;
modifier mlog {
//emit MIBLog(msg.sig, msg.sender, msg.value, msg.data);
emit MIBLog(msg.sig, msg.sender, msg.value);
_;
}
}
contract Ownable {
address public owner;
event OwnerLog(address indexed previousOwner, address indexed newOwner, bytes4 sig);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
emit OwnerLog(owner, newOwner, msg.sig);
owner = newOwner;
}
}
contract MIBStop is Ownable, DMIBLog {
bool public stopped;
modifier stoppable {
require (!stopped);
_;
}
function stop() onlyOwner mlog public {
stopped = true;
}
function start() onlyOwner mlog public {
stopped = false;
}
}
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
// uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function approve(address spender, uint256 value) public returns (bool);
function transferFrom(address from, address to, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract MIBToken is ERC20, MIBStop {
uint256 public _totalsupply;
string public tokenName = "Mobile Integrated Blockchain";
string public symbol = "MIB";
uint public decimals = 18;
using SafeMath for uint256;
/* Actual balances of token holders */
mapping(address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
event Burn(address indexed from, uint256 value);
constructor (uint256 _totsupply) public {
_totalsupply = _totsupply.mul(1e18);
balances[msg.sender] = balances[msg.sender].add(_totalsupply);
}
function () external payable {
revert();
}
function totalSupply() public view returns (uint256) {
return _totalsupply;
}
function balanceOf(address who) public view returns (uint256) {
return balances[who];
}
function transfer(address to, uint256 value) stoppable public returns (bool) {
require(to != address(0));
require(0 < value);
require(0 < balances[to].add(value));
require(0 < balances[msg.sender].sub(value));
balances[to] = balances[to].add(value);
balances[msg.sender] = balances[msg.sender].sub(value);
emit Transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint256 value) stoppable public returns (bool) {
require(to != address(0));
require(value <= balances[from]);
require(value <= allowed[from][msg.sender]);
balances[from] = balances[from].sub(value);
balances[to] = balances[to].add(value);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(value);
emit Transfer(from, to, value);
return true;
}
function approve(address spender, uint256 value) stoppable public returns (bool success) {
allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function allowance(address owner, address spender) public view returns (uint256) {
return allowed[owner][spender];
}
function burn(uint256 value) public {
_burn(msg.sender, value);
}
function _burn(address who, uint256 value) internal {
require(value <= balances[who]);
balances[who] = balances[who].sub(value);
emit Burn(who, value);
emit Transfer(who, address(0), value);
}
function burnFrom(address who, uint256 value) public onlyOwner payable returns (bool success) {
require(balances[who] >= value);
balances[who] = balances[who].sub(value);
balances[msg.sender] = balances[msg.sender].add(value);
emit Burn(who, value);
return true;
}
}
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