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Contract Source Code:
File 1 of 1 : MARA
pragma solidity ^0.4.25; 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); uint256 c = a / b; assert(a == b * c + a % b); 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; } } contract MARA { string public constant name = "MARAChain Cash"; string public constant symbol = "MARA"; uint8 public constant decimals = 0; uint public _totalSupply = 100000000; uint256 public RATE = 1; bool public isMinting = false; string public constant generatedBy = "MARAChain, Sociedad Limitada - www.marachain.eu"; using SafeMath for uint256; address public owner; modifier onlyOwner() { if (msg.sender != owner) { throw; } _; } mapping(address => uint256) balances; mapping(address => mapping(address=>uint256)) allowed; function () payable{ createTokens(); } constructor() public { owner = 0xc69c8e0AAeB7949A9c304EE1CEd09bd49C2d7435; balances[owner] = _totalSupply; } function burnTokens(uint256 _value) onlyOwner { require(balances[msg.sender] >= _value && _value > 0 ); _totalSupply = _totalSupply.sub(_value); balances[msg.sender] = balances[msg.sender].sub(_value); } function createTokens() payable { if(isMinting == true){ require(msg.value > 0); uint256 tokens = msg.value.div(100000000000000).mul(RATE); balances[msg.sender] = balances[msg.sender].add(tokens); _totalSupply = _totalSupply.add(tokens); owner.transfer(msg.value); } else{ throw; } } function endCrowdsale() onlyOwner { isMinting = false; } function changeCrowdsaleRate(uint256 _value) onlyOwner { RATE = _value; } function totalSupply() constant returns(uint256){ return _totalSupply; } function balanceOf(address _owner) constant returns(uint256){ return balances[_owner]; } function transfer(address _to, uint256 _value) returns(bool) { require(balances[msg.sender] >= _value && _value > 0 ); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); Transfer(msg.sender, _to, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) returns(bool) { require(allowed[_from][msg.sender] >= _value && balances[_from] >= _value && _value > 0); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); Transfer(_from, _to, _value); return true; } function approve(address _spender, uint256 _value) returns(bool){ allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) constant returns(uint256){ return allowed[_owner][_spender]; } event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); }
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