Questions tagged [openzeppelyn]

I'm creating a crowdsale contract that's using open-zeppelin smart contracts and the files i'm using are the base Crowdsale.sol and the CappedCrowdsale.sol extension. So, these both files are importing the SafeMath library: import…

I've been trying to set up demo ethereum based ICO fallowing this tutorial, but each time i try to deploy contract to Ropsten or Rinkeby ir fails with this error: Running migration: 2_deploy_contracts.js Deploying SuperHeroTokenThreeCrowdsale... …

I am using zeppelin to visualize the solr data, i am using this 3rd party interpreter (https://github.com/lucidworks/zeppelin-solr/). Now the issue is, i have two versions of solr installed on two different containers like version 6 & 8. But in…

I want to create a smart contract and launch it for ICO. I also create a website where people can buy my token. I want know how to check how many token been sold (live)? so i can create a live bar counter to show how many percentages of the token…