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pragma solidity ^0.4.13;
//Copyright Gravitas Holdings Pte Ltd. MIT License
//Author : @santoshrout
// Extended from @BokkyPooBah Licence: MIT Licence.
contract ERC20Interface {
// Get the total token supply
function totalSupply() constant returns (uint256 totalSupply);
// Get the account balance of another account with address _address
function balanceOf(address _address) 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 AXNToken is ERC20Interface{
string public constant symbol = "AEXON";
string public constant name = "AEXON Token";
uint8 public constant decimals = 18;
uint256 _totalSupply = 3000000000;
//owner of this contract
address public owner;
//Balance of each account
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
modifier onlyOwner(){
require (msg.sender !=owner);
function AXNToken(){
owner = msg.sender;
balances[owner] = _totalSupply;
function totalSupply() constant returns (uint256 totalSupply) {
totalSupply = _totalSupply;
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
* Internal transfer, only can be called by this contract
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Save this for an assertion in the future
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
* Transfer tokens
* Send `_value` tokens to `_to` from your account
* @param _to The address of the recipient
* @param _value the amount to send
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
* Transfer tokens from other address
* Send `_value` tokens to `_to` in behalf of `_from`
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
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