pragma solidity ^0.4.8;

// ----------------------------------------------------------------------------------------------
// Sample fixed supply token contract
// Enjoy. (c) BokkyPooBah 2017. The MIT Licence.
// ----------------------------------------------------------------------------------------------

// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/issues/20
contract ERC20Interface
{
	// Get the total token supply
	function totalSupply() constant returns (uint256 totalSupply);

	// Get the account balance of another account with address _owner
	function balanceOf(address _owner) constant returns (uint256 balance);

	// Send _value amount of tokens to address _to
	function transfer(address _to, uint256 _value) returns (bool success);

	// Send _value amount of tokens from address _from to address _to
	function transferFrom(address _from, address _to, uint256 _value) returns (bool success);

	// Allow _spender to withdraw from your account, multiple times, up to the _value amount.
	// If this function is called again it overwrites the current allowance with _value.
	// this function is required for some DEX functionality
	function approve(address _spender, uint256 _value) returns (bool success);

	// Returns the amount which _spender is still allowed to withdraw from _owner
	function allowance(address _owner, address _spender) constant returns (uint256 remaining);

	// Triggered when tokens are transferred.
	event Transfer(address indexed _from, address indexed _to, uint256 _value);

	// Triggered whenever approve(address _spender, uint256 _value) is called.
	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}

contract FixedSupplyToken is ERC20Interface
{
	string public constant symbol = "BCOIN";
	string public constant name = "BannerCoin";
	uint8 public constant decimals = 8;
	uint256 _totalSupply = 10000000000000000;

	// Owner of this contract
	address public owner;

	// Balances for each account
	mapping(address => uint256) balances;

	// Owner of account approves the transfer of an amount to another account
	mapping(address => mapping (address => uint256)) allowed;

	// Functions with this modifier can only be executed by the owner
	modifier onlyOwner() 
	{
		require(msg.sender == owner);
		_;
	}

	// Constructor
	function FixedSupplyToken()
	{
		owner = msg.sender;
		balances[owner] = _totalSupply;
	}

	function totalSupply() constant returns (uint256 totalSupply)
	{
		totalSupply = _totalSupply;
	}

	// What is the balance of a particular account?
	function balanceOf(address _owner) constant returns (uint256 balance)
	{
		return balances[_owner];
	}

	// Transfer the balance from owner's account to another account
	function transfer(address _to, uint256 _amount) returns (bool success)
	{
		if	(
				balances[msg.sender] >= _amount &&
				_amount > 0 &&
				balances[_to] + _amount > balances[_to]
			)
		{
			balances[msg.sender] -= _amount;
			balances[_to] += _amount;
			Transfer(msg.sender, _to, _amount);
			return true;
		} else {
			return false;
		}
	}

	// Send _value amount of tokens from address _from to address _to
	// The transferFrom method is used for a withdraw workflow, allowing contracts to send
	// tokens on your behalf, for example to "deposit" to a contract address and/or to charge
	// fees in sub-currencies; the command should fail unless the _from account has
	// deliberately authorized the sender of the message via some mechanism; we propose
	// these standardized APIs for approval:
	function transferFrom(
				address _from,
				address _to,
				uint256 _amount
				) returns (bool success)
	{
		if	(
				balances[_from] >= _amount &&
				allowed[_from][msg.sender] >= _amount &&
				_amount > 0 &&
				balances[_to] + _amount > balances[_to]
			)
		{
			balances[_from] -= _amount;
			allowed[_from][msg.sender] -= _amount;
			balances[_to] += _amount;
			Transfer(_from, _to, _amount);
			return true;
		} else {
			return false;
		}
	}

	// Allow _spender to withdraw from your account, multiple times, up to the _value amount.
	// If this function is called again it overwrites the current allowance with _value.
	function approve(address _spender, uint256 _amount) returns (bool success)
	{
		allowed[msg.sender][_spender] = _amount;
		Approval(msg.sender, _spender, _amount);
		return true;
	}

	function allowance(address _owner, address _spender) constant returns (uint256 remaining) 
	{
		return allowed[_owner][_spender];
	}
}