/**
 *Submitted for verification at Etherscan.io on 2021-09-10
*/

pragma solidity 0.6.6;

// ----------------------------------------------------------------------------

// 'York' token contract


// Deployed to : 0xF73C11173ED107bAcb997fb2dA45Ca04dC2097c4

// Symbol : York

// Name : York

// Total supply: 10000000000

// Decimals : 6

//

// Enjoy.

//

// (c) by Ahiwe Onyebuchi Valentine.

// ----------------------------------------------------------------------------

 

// ----------------------------------------------------------------------------

// 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

// ----------------------------------------------------------------------------

abstract contract ERC20Interface {

function totalSupply() virtual public view returns (uint);

function balanceOf(address tokenOwner) virtual public view returns (uint balance);

function allowance(address tokenOwner, address spender) virtual public view returns (uint remaining);

function transfer(address to, uint tokens) virtual public returns (bool success);

function approve(address spender, uint tokens) virtual public returns (bool success);

function transferFrom(address from, address to, uint tokens) virtual 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

// ----------------------------------------------------------------------------

abstract contract ApproveAndCallFallBack {

function receiveApproval(address from, uint256 tokens, address token, bytes memory data) virtual public;

}

 

// ----------------------------------------------------------------------------

// Owned contract

// ----------------------------------------------------------------------------

contract Owned {

address public owner;

address public newOwner;

event OwnershipTransferred(address indexed _from, address indexed _to);

constructor() 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);

emit OwnershipTransferred(owner, newOwner);

owner = newOwner;

newOwner = address(0);

}

}

 

// ----------------------------------------------------------------------------

// ERC20 Token, with the addition of symbol, name and decimals and assisted

// token transfers

// ----------------------------------------------------------------------------

contract York 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

// ------------------------------------------------------------------------

constructor() public {

symbol = "York";

name = "York";

decimals = 6;

_totalSupply = 10000000000000000;

balances[0xF73C11173ED107bAcb997fb2dA45Ca04dC2097c4] = _totalSupply;

emit Transfer(address(0), 0xF73C11173ED107bAcb997fb2dA45Ca04dC2097c4, _totalSupply);

}

 

// ------------------------------------------------------------------------

// Total supply

// ------------------------------------------------------------------------

function totalSupply() public override view returns (uint) {

return _totalSupply - balances[address(0)];

}

 

// ------------------------------------------------------------------------

// Get the token balance for account tokenOwner

// ------------------------------------------------------------------------

function balanceOf(address tokenOwner) public override view 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 override returns (bool success) {

balances[msg.sender] = safeSub(balances[msg.sender], tokens);

balances[to] = safeAdd(balances[to], tokens);

emit 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 override returns (bool success) {

allowed[msg.sender][spender] = tokens;

emit 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 override 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);

emit 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 override view 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 memory data) public returns (bool success) {

allowed[msg.sender][spender] = tokens;

emit Approval(msg.sender, spender, tokens);

ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);

return true;

}

 

// ------------------------------------------------------------------------

// Don't accept ETH

// ------------------------------------------------------------------------

// function () external 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);

}

}