1

I'm using Ropsten Testnet and Remix.

Is there an obvious error in this code? Why does not he accept eth.

function () payable public { buy(); }

function buy () payable public whenNotPaused beforeDeadline afterStartTime saleNotClosed {
    require(msg.value >= minContribution);

    // Update the sender's balance of wei contributed and the amount raised
    uint amount = msg.value;
    uint currentBalance = balanceOf[msg.sender];
    balanceOf[msg.sender] = currentBalance.add(amount);
    amountRaised = amountRaised.add(amount);

    // Compute the number of tokens to be rewarded to the sender
    // Note: it's important for this calculation that both wei
    // and PDT have the same number of decimal places (18)
    uint numTokens = amount.mul(rate);

    // Transfer the tokens from the crowdsale supply to the sender
    if (tokenReward.transferFrom(tokenReward.owner(), msg.sender, numTokens)) {
        FundTransfer(msg.sender, amount, true);
        // Check if the funding goal or cap have been reached
        // TODO check impact on gas cost
        checkFundingGoal();
        checkFundingCap();
    }
    else {
        revert();
    }
}

The Crowdsale contract has an allowance. The gas limit has been increased in many ways. My ether wallet warning ! enter image description here

The full code is here: https://ropsten.etherscan.io/address/0x500c3ff2c1a561cd0fda1cf0c77fe0d17af5fda5

What I'm missing here?. Thank you in advance for your answer. The last question was unanswered, so I ask again !

1

the fallback function can't execute your buy() function as it has only a stipend of 2300 gas. check How much computation can be done in a fallback function?

so remove it from the fallback function and call it directly

function () payable public {  }

function buy () payable public whenNotPaused beforeDeadline afterStartTime saleNotClosed {
    require(msg.value >= minContribution);

    // Update the sender's balance of wei contributed and the amount raised
    uint amount = msg.value;
    uint currentBalance = balanceOf[msg.sender];
    balanceOf[msg.sender] = currentBalance.add(amount);
    amountRaised = amountRaised.add(amount);

    // Compute the number of tokens to be rewarded to the sender
    // Note: it's important for this calculation that both wei
    // and PDT have the same number of decimal places (18)
    uint numTokens = amount.mul(rate);

    // Transfer the tokens from the crowdsale supply to the sender
    if (tokenReward.transferFrom(tokenReward.owner(), msg.sender, numTokens)) {
        FundTransfer(msg.sender, amount, true);
        // Check if the funding goal or cap have been reached
        // TODO check impact on gas cost
        checkFundingGoal();
        checkFundingCap();
    }
    else {
        revert();
    }
}
  • Thank you for answering. Thorkil Værge how to correct this. I'm not programmer. Without if (tokenReward.transferFrom(tokenReward.owner(), msg.sender, numTokens)) { , works fine. I'm just not sure when I will delete this lines I will be able to distribute tokens. Badr Bellaj - How to make this fallback function cheaper. What should I remowe? – Robert Apr 26 '18 at 12:25
  • Badr Bellaj , Thank You for the correction but this give me error in Remix – Robert Apr 26 '18 at 12:53
  • @Robert now it should be ok. don't forget to accept the answer if you think it's helpful – Badr Bellaj Apr 26 '18 at 13:32
  • Badr Bellaj You was right. Works! – Robert Apr 26 '18 at 14:31
0

The function call that is failing is a call to this method:

function setTokenOffering(address offeringAddr, uint256 amountForSale) external onlyOwner onlyTokenOfferingAddrNotSet {
        require(!transferEnabled);

        uint256 amount = (amountForSale == 0) ? TokenAllowance : amountForSale;
        require(amount <= TokenAllowance);

        approve(offeringAddr, amount);
        tokenAllowanceAddr = offeringAddr;

    }

You have already called the enableTransfer function which sets transferEnabled to true. So the first line in the above method require(!transferEnabled); will fail and the execution will stop.

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