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- /**
- *Submitted for verification at Etherscan.io on 2018-12-04
- */
- pragma solidity ^0.4.18;
- // ----------------------------------------------------------------------------
- // Safe maths
- // ----------------------------------------------------------------------------
- contract SafeMath {
- function safeAdd(uint a, uint b) public pure returns (uint c) {
- c = a + b;
- require(c >= a);
- }
- function safeSub(uint a, uint b) public pure returns (uint c) {
- require(b <= a);
- c = a - b;
- }
- function safeMul(uint a, uint b) public pure returns (uint c) {
- c = a * b;
- require(a == 0 || c / a == b);
- }
- function safeDiv(uint a, uint b) public pure returns (uint c) {
- require(b > 0);
- c = a / b;
- }
- }
- // ----------------------------------------------------------------------------
- // ERC Token Standard #20 Interface
- // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
- // ----------------------------------------------------------------------------
- contract ERC20Interface {
- function totalSupply() public constant returns (uint);
- function balanceOf(address tokenOwner) public constant returns (uint balance);
- function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
- function transfer(address to, uint tokens) public returns (bool success);
- function approve(address spender, uint tokens) public returns (bool success);
- function transferFrom(address from, address to, uint tokens) public returns (bool success);
- event Transfer(address indexed from, address indexed to, uint tokens);
- event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
- }
- // ----------------------------------------------------------------------------
- // Contract function to receive approval and execute function in one call
- //
- // Borrowed from MiniMeToken
- // ----------------------------------------------------------------------------
- contract ApproveAndCallFallBack {
- function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
- }
- // ----------------------------------------------------------------------------
- // Owned contract
- // ----------------------------------------------------------------------------
- contract Owned {
- address public owner;
- address public newOwner;
- event OwnershipTransferred(address indexed _from, address indexed _to);
- function Owned() public {
- owner = msg.sender;
- }
- modifier onlyOwner {
- require(msg.sender == owner);
- _;
- }
- function transferOwnership(address _newOwner) public onlyOwner {
- newOwner = _newOwner;
- }
- function acceptOwnership() public {
- require(msg.sender == newOwner);
- OwnershipTransferred(owner, newOwner);
- owner = newOwner;
- newOwner = address(0);
- }
- }
- // ----------------------------------------------------------------------------
- // ERC20 Token, with the addition of symbol, name and decimals and assisted
- // token transfers
- // ----------------------------------------------------------------------------
- contract QBITToken is ERC20Interface, Owned, SafeMath {
- string public symbol;
- string public name;
- uint8 public decimals;
- uint public _totalSupply;
- mapping(address => uint) balances;
- mapping(address => mapping(address => uint)) allowed;
- // ------------------------------------------------------------------------
- // Constructor
- // ------------------------------------------------------------------------
- function QBITToken() public {
- symbol = "QBIT";
- name = "Qubitica";
- decimals = 18;
- _totalSupply = 10000000000000000000000000;
- balances[0xCD4a930885E031Bd49BA51DC9293D05FC232C23C] = _totalSupply;
- Transfer(address(0), 0xCD4a930885E031Bd49BA51DC9293D05FC232C23C, _totalSupply);
- }
- // ------------------------------------------------------------------------
- // Total supply
- // ------------------------------------------------------------------------
- function totalSupply() public constant returns (uint) {
- return _totalSupply - balances[address(0)];
- }
- // ------------------------------------------------------------------------
- // Get the token balance for account tokenOwner
- // ------------------------------------------------------------------------
- function balanceOf(address tokenOwner) public constant returns (uint balance) {
- return balances[tokenOwner];
- }
- // ------------------------------------------------------------------------
- // Transfer the balance from token owner's account to to account
- // - Owner's account must have sufficient balance to transfer
- // - 0 value transfers are allowed
- // ------------------------------------------------------------------------
- function transfer(address to, uint tokens) public returns (bool success) {
- balances[msg.sender] = safeSub(balances[msg.sender], tokens);
- balances[to] = safeAdd(balances[to], tokens);
- Transfer(msg.sender, to, tokens);
- return true;
- }
- // ------------------------------------------------------------------------
- // Token owner can approve for spender to transferFrom(...) tokens
- // from the token owner's account
- //
- // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
- // recommends that there are no checks for the approval double-spend attack
- // as this should be implemented in user interfaces
- // ------------------------------------------------------------------------
- function approve(address spender, uint tokens) public returns (bool success) {
- allowed[msg.sender][spender] = tokens;
- Approval(msg.sender, spender, tokens);
- return true;
- }
- // ------------------------------------------------------------------------
- // Transfer tokens from the from account to the to account
- //
- // The calling account must already have sufficient tokens approve(...)-d
- // for spending from the from account and
- // - From account must have sufficient balance to transfer
- // - Spender must have sufficient allowance to transfer
- // - 0 value transfers are allowed
- // ------------------------------------------------------------------------
- function transferFrom(address from, address to, uint tokens) public returns (bool success) {
- balances[from] = safeSub(balances[from], tokens);
- allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
- balances[to] = safeAdd(balances[to], tokens);
- Transfer(from, to, tokens);
- return true;
- }
- // ------------------------------------------------------------------------
- // Returns the amount of tokens approved by the owner that can be
- // transferred to the spender's account
- // ------------------------------------------------------------------------
- function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
- return allowed[tokenOwner][spender];
- }
- // ------------------------------------------------------------------------
- // Token owner can approve for spender to transferFrom(...) tokens
- // from the token owner's account. The spender contract function
- // receiveApproval(...) is then executed
- // ------------------------------------------------------------------------
- function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
- allowed[msg.sender][spender] = tokens;
- Approval(msg.sender, spender, tokens);
- ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
- return true;
- }
- // ------------------------------------------------------------------------
- // Don't accept ETH
- // ------------------------------------------------------------------------
- function () public payable {
- revert();
- }
- // ------------------------------------------------------------------------
- // Owner can transfer out any accidentally sent ERC20 tokens
- // ------------------------------------------------------------------------
- function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
- return ERC20Interface(tokenAddress).transfer(owner, tokens);
- }
- }
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