Tag: token

Ethereum Coin Aj007

Solidity Smart Contract

pragma solidity 0.4.8;
contract Aj007{

	mapping (address => uint256) public balanceOf;
	// allowing others to execute transactions on your behalf
	mapping (address => mapping (address => uint256)) public allowance;
	
	// balanceOf[address] = 5;
	string public standard = "Aj007 v1.0";
	string public name;
	string public symbol;
	uint8 public decimal; // 1.23 Number of decimal
	uint256 public totalSupply;
	//indexed address passsed will be stored in log memory and not contract data
	event Transfer(address indexed from, address indexed to, uint256 _value);

	function  Aj007 (uint256 initialSupply, string tokenName, string tokenSymbol, uint8 decimalUnits){
		balanceOf[msg.sender] = initialSupply;
		totalSupply = initialSupply;
		decimal = decimalUnits;
		name = tokenName;
		symbol = tokenSymbol;

	} 

	function transfer (address _to,uint256 _value){
		if(balanceOf[msg.sender] < _value) throw;
		//0-255 8 bit
		// 250,10 = 4 Buffer overflow
		if(balanceOf[_to] + _value < balanceOf [_to]) throw;
		// Any number of conditions can be added here
		balanceOf[msg.sender] -= _value;
		balanceOf[_to] += _value;
		// Can be used for debugging values of smart contract and also act as an event for other clients
		// Technically a logging method
		Transfer(msg.sender,_to,_value);
	}

	function approve (address _spender, uint256 _value) returns(bool res){
		allowance[msg.sender][_spender] = _value;
		return true;
	}
	
	function transferFrom (address _from, address _to, uint256 _value) returns(bool res){
		if(balanceOf[_from] < _value) throw;
		if(balanceOf[_to] + _value < balanceOf[_to]) throw; if(_value > allowance[_from][msg.sender]) throw;

		balanceOf[_from] -= _value;
		balanceOf[_to] += _value;

		allowance[_from][msg.sender] -= _value;

		Transfer(_from,_to, _value);
		return true;
	}
	
}