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August 07, 2018, 03:28:07 AM Last edit: August 07, 2018, 04:43:06 AM by Igor______ |
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Уже голову себе всю сломал, что может быть? Есть два контракта , один токена другой ICO. при обращении к функции buyTokens в которую вводится количество токенов на приобретение, выкидывает ошибку transact to NEFCrowdsale.buyTokens errored: VM error: revert. revert The transaction has been reverted to the initial state. Note: The constructor should be payable if you send value. Debug the transaction to get more information.
pragma solidity ^0.4.11;
import "./SafeMath.sol"; import "./Token.sol";
contract Crowdsale{
using SafeMath for uint;
address public admin; Token public tokenContract; uint public tokenPrice; uint public tokenSold;
event Sell(address _buyer,uint _amount);
function Crowdsale(Token _tokenContract,uint _tokenPrice) public { admin = msg.sender; tokenContract = _tokenContract; tokenPrice = _tokenPrice; } function buyTokens(uint256 _numberOfTokens) public payable { require(msg.value == _numberOfTokens.mul( tokenPrice)); require(tokenContract.balanceOf(this) >= _numberOfTokens); require(tokenContract.transfer(msg.sender,_numberOfTokens)); tokenSold += _numberOfTokens; emit Sell(msg.sender,_numberOfTokens); } function endSale() public{ require(msg.sender == admin); require(tokenContract.transfer(admin, tokenContract.balanceOf(this))); admin.transfer(address(this).balance); }
}
contract Token{
using SafeMath for uint;
string public name = "Token"; string public symbol = "Token"; string public standard = "Token v1.0";
event Transfer(address indexed _from,address indexed _to,uint _value); event Approval(address indexed _owner,address indexed _spender,uint _value);
uint public totalSupply; mapping(address => uint) public balanceOf; mapping(address => mapping(address=>uint)) public allowance;
function Token(uint _initialSupply) public { totalSupply = _initialSupply; balanceOf[msg.sender] = _initialSupply; }
function transfer(address _to,uint _value) public payable returns(bool success){ require(_to != address(0)); require(_value <= balanceOf[msg.sender]); balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value); balanceOf[_to] = balanceOf[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; }
function approve(address _spender,uint _value) public returns(bool success){ allowance[msg.sender][_spender] = _value; emit Approval(msg.sender,_spender,_value); return true; }
function transferFrom(address _from,address _to,uint _value) public returns(bool success){ require(_to != address(0)); require(_value <= balanceOf[_from]); require(_value <= allowance[_from][msg.sender]); balanceOf[_from] = balanceOf[_from].sub(_value); balanceOf[_to] = balanceOf[_to].add(_value); allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; }
}
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