DRIVR Network

Smart Contract

DRIVR Network Smart Contract

 

Smart Contract will be published on Github shortly
DRIVR.Network.Github 

---

pragma solidity ^0.4.11;

/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale.
* Crowdsales have a start and end timestamps, where investors can make
* token purchases and the crowdsale will assign them tokens based
* on a token per ETH rate. Funds collected are forwarded to a wallet
* as they arrive.
*/

library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}

function div(uint256 a, uint256 b) internal pure 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 pure returns (uint256) {
assert(b <= a);
return a - b;
}

function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}

contract Ownable {
address public owner;

event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}

/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}

/**
* @dev 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 public {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}

}

/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) constant public returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}

/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;

mapping(address => uint256) tokenBalances;

/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(tokenBalances[msg.sender]>=_value);
tokenBalances[msg.sender] = tokenBalances[msg.sender].sub(_value);
tokenBalances[_to] = tokenBalances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}

/**
* @dev 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 public returns (uint256 balance) {
return tokenBalances[_owner];
}

}

contract DRIVRNetworkToken is BasicToken,Ownable {

using SafeMath for uint256;

string public constant name = "DRIVR Network";
string public constant symbol = "DVR";
uint256 public constant decimals = 18;

uint256 public constant INITIAL_SUPPLY = 750000000;
/**
* @dev Contructor that gives msg.sender all of existing tokens.
*/
function DRIVRNetworkToken(address wallet) public {
owner = msg.sender;
totalSupply = INITIAL_SUPPLY * 10 ** 18;
tokenBalances[wallet] = totalSupply; //Since we divided the token into 10^18 parts
}

function mint(address wallet, address buyer, uint256 tokenAmount) public onlyOwner {
require(tokenBalances[wallet] >= tokenAmount); // checks if it has enough to sell
tokenBalances[buyer] = tokenBalances[buyer].add(tokenAmount); // adds the amount to buyer's balance
tokenBalances[wallet] = tokenBalances[wallet].sub(tokenAmount); // subtracts amount from seller's balance
Transfer(wallet, buyer, tokenAmount);
totalSupply = totalSupply.sub(tokenAmount);
}
function showMyTokenBalance(address addr) public view returns (uint tokenBalance) {
tokenBalance = tokenBalances[addr];
}
}

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