Issue with a "mock" example

Support
1

When I run the mock contract “RefundablePostDeliveryCrowdsaleImpl” in Remix, I get the following error:
“Creation of RefundablePostDeliveryCrowdsaleImpl errored: transaction execution failed”

Surprisingly the other contract “RefundableCrowdsaleImpl”, which is almost exactly the same, works just fine.

Does anyone face this issue as well?

:computer: Environment

OpenZeppelin: 2.2.0
Remix (online)

:1234: Code to reproduce bug

contract RefundablePostDeliveryCrowdsaleImpl is RefundablePostDeliveryCrowdsale {
    constructor (
        uint256 openingTime,
        uint256 closingTime,
        uint256 rate,
        address payable wallet,
        IERC20 token,
        uint256 goal
    )
        public
        Crowdsale(rate, wallet, token)
        TimedCrowdsale(openingTime, closingTime)
        RefundableCrowdsale(goal)
    {
        // solhint-disable-previous-line no-empty-blocks
    }
}

Thank you!

2

Hm, that is indeed very strange. Could you share both of the sources you used for the Refundable and RefundablePostDelivery?

3

sure, here are the two codes:

For RefundablePostDeliveryCrowdsaleImpl:

pragma solidity ^0.5.0;

import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/token/ERC20/IERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/crowdsale/distribution/RefundablePostDeliveryCrowdsale.sol";

contract RefundablePostDeliveryCrowdsaleImpl is RefundablePostDeliveryCrowdsale {
    constructor (
        uint256 openingTime,
        uint256 closingTime,
        uint256 rate,
        address payable wallet,
        IERC20 token,
        uint256 goal
    )
        public
        Crowdsale(rate, wallet, token)
        TimedCrowdsale(openingTime, closingTime)
        RefundableCrowdsale(goal)
    {
        // solhint-disable-previous-line no-empty-blocks
    }
}

For RefundableCrowdsaleImpl

pragma solidity ^0.5.0;

import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/token/ERC20/IERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/crowdsale/distribution/RefundablePostDeliveryCrowdsale.sol";

contract RefundableCrowdsaleImpl is RefundableCrowdsale {
    constructor (
        uint256 openingTime,
        uint256 closingTime,
        uint256 rate,
        address payable wallet,
        IERC20 token,
        uint256 goal
    )
        public
        Crowdsale(rate, wallet, token)
        TimedCrowdsale(openingTime, closingTime)
        RefundableCrowdsale(goal)
    {
        // solhint-disable-previous-line no-empty-blocks
    }
}
4

I'm using the same import link since it works for the RefundableCrowdsaleImpl as well.

5

The RefundablePostDelivery crowdsale will have a more expensive constructor, since it needs to create an escrow contract to hold the tokens. Are you sure you’re not running out of gas during deployment?

6

I just run a quick test locally, and deploying a RefundablePostDeliveryCrowdsaleImpl should cost around 3.6 million gas, which may be higher than your defaults (though still fits inside a block).

3 Likes
7

Yes, the issue was from the gas!

Remix default is 3 million, I’ve increased it to 3.6 and it works fine now.

Thanks a lot nventuro.

2 Likes