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/*
Ⓒ2017 INVACIO
INV Coin | Phase 1 ERC20 | Phase 2 Vadgama Chain | Invacio.com
Invacio Coin [INV] is a Cryptocurrency (private digital currency), that has a value based on the current market.
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) constant returns (uint256);
function transfer(address to, uint256 value) returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/*
ERC20 interface
see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint256);
function transferFrom(address from, address to, uint256 value) returns (bool);
function approve(address spender, uint256 value) returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/* SafeMath - the lowest gas library
Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/*
Basic token
Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
function transfer(address _to, uint256 _value) returns (bool) {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/*
Gets the balance of the specified address.
param _owner The address to query the the balance of.
return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
}
/* Implementation of the basic standard token.
https://github.com/ethereum/EIPs/issues/20
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) allowed;
/*
Transfer tokens from one address to another
param _from address The address which you want to send tokens from
param _to address The address which you want to transfer to
param _value uint256 the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/*
Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
param _spender The address which will spend the funds.
param _value The amount of Roman Lanskoj's tokens to be spent.
*/
function approve(address _spender, uint256 _value) returns (bool) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/*
Function to check the amount of tokens that an owner allowed to a spender.
param _owner address The address which owns the funds.
param _spender address The address which will spend the funds.
return A uint256 specifing the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/*
The Ownable contract has an owner address, and provides basic authorization control
functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
function Ownable() {
owner = 0xD5483f02d8bEd6A1D9deAb9B425aDa80cd1ed645;
}
/*
Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/*
Allows the current owner to transfer control of the contract to a newOwner.
param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner {
require(newOwner != address(0));
owner = newOwner;
}
}
contract Invacio is StandardToken, Ownable {
string public constant name = "Invacio Coin";
string public constant symbol = "INV";
uint public constant decimals = 8;
uint256 public initialSupply;
function Invacio () {
totalSupply = 60000000 * 10 ** decimals;
balances[0xD5483f02d8bEd6A1D9deAb9B425aDa80cd1ed645] = totalSupply;
initialSupply = totalSupply;
Transfer(0, this, totalSupply);
Transfer(this, 0xD5483f02d8bEd6A1D9deAb9B425aDa80cd1ed645, totalSupply);
}
}