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/**
 *Submitted for verification at Etherscan.io on 2017-01-22
*/

pragma solidity ^0.4.8;

contract testingToken {
	mapping (address => uint256) public balanceOf;
	mapping (address => uint256) public weiWantedOf;
	mapping (address => uint256) public tokensOfferedOf;
	mapping (address => bool) public tradeActive;
	address public bank;
	uint256 public ethTaxRate = 10;
	uint256 public tokenTaxRate = 5;
	function testingToken() {
		bank = msg.sender;
		balanceOf[msg.sender] = 100000;
	}
	
	event Transfer(address indexed _from, address indexed _to, uint256 _value);
	
	function totalSupply() constant returns (uint256 totalSupply) {
	    return 10000;
	}
	function balanceOf(address _owner) constant returns (uint256 balance) {
	    return balanceOf[_owner];
	}
	
	function transfer(address _to, uint256 _value) returns (bool success) { //give tokens to someone
		if (balanceOf[msg.sender]<_value) throw;
		if (balanceOf[_to]+_value<balanceOf[_to]) throw;
		if (_value<0) throw;
		balanceOf[msg.sender] -= _value;
		balanceOf[_to] += (_value*(100-tokenTaxRate))/100;
		balanceOf[bank] += (_value*tokenTaxRate)/100;
		//now check for rounding down which would result in permanent loss of coins
		if ((_value*tokenTaxRate)%100 != 0) balanceOf[bank]+=1;
		Transfer(msg.sender,_to,_value);
		return true;
	}
	
	mapping (address => mapping (address=>uint256)) approvalList;
	function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
		if (balanceOf[_from]<_value) throw;
		if (balanceOf[_to]+_value<balanceOf[_to]) throw;
		if (_value<0) throw;
		if (approvalList[_from][msg.sender]<_value) throw;
		approvalList[_from][msg.sender]-=_value;
		balanceOf[_from] -= _value;
		balanceOf[_to] += (_value*(100-tokenTaxRate))/100;
		balanceOf[bank] += (_value*tokenTaxRate)/100;
		//now check for rounding down which would result in permanent loss of coins
		if ((_value*tokenTaxRate)%100 != 0) balanceOf[bank]+=1;
		Transfer(_from,_to,_value);
		return true;
	}
	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
	function approve(address _spender, uint256 _value) returns (bool success) {
	    approvalList[msg.sender][_spender]=_value;
	    Approval(msg.sender,_spender,_value);
	    return true;
	}
	function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
	    return approvalList[_owner][_spender];
	}
	
	function offerTrade(uint256 _weiWanted, uint256 _tokensOffered) { //offer the amt of ether you want and the amt of tokens youd give
	    weiWantedOf[msg.sender] = _weiWanted;
	    tokensOfferedOf[msg.sender] = _tokensOffered;
	    tradeActive[msg.sender] = true;
	}
	function agreeToTrade(address _from) payable { //choose a trade to agree to and execute it
	    if (!tradeActive[_from]) throw;
	    if (weiWantedOf[_from]!=msg.value) throw;
	    if (balanceOf[_from]<tokensOfferedOf[_from]) throw;
	    if (!_from.send((msg.value*(100-ethTaxRate))/100)) throw;
	    balanceOf[_from] -= tokensOfferedOf[_from];
	    balanceOf[msg.sender] += (tokensOfferedOf[_from]*(100-tokenTaxRate))/100;
		balanceOf[bank] += (tokensOfferedOf[_from]*tokenTaxRate)/100;
		tradeActive[_from] = false;
		Transfer(_from,msg.sender,tokensOfferedOf[_from]);
		//now check for rounding down which would result in permanent loss of coins
		if ((tokensOfferedOf[_from]*tokenTaxRate)%100 != 0) balanceOf[bank]+=1;
	}
	
	modifier bankOnly {
		if (msg.sender != bank) throw;
		_;
	}
	
	function setTaxes(uint256 _ethTaxRate, uint256 _tokenTaxRate) bankOnly { //the bank can change the tax rates
		ethTaxRate = _ethTaxRate;
		tokenTaxRate = _tokenTaxRate;
	}
	function extractWei(uint256 _wei) bankOnly { //withdraw money from the contract
		if (!msg.sender.send(_wei)) throw;
	}
	function transferOwnership(address _bank) bankOnly { //change owner
		bank = _bank;
	}
}

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