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I based some code on this - https://solidity.readthedocs.io/en/develop/types.html When I run the code below -pragma solidity ^0.4.18;contract CA2 { mapping (uint => Student) public students;...
Asked on 02/27/2021 by Trevor Lee Oakley
1 answerI am building an application using ethereum smart contracts. I am using Metamask Chrome extension to run my application on Chrome. But I am facing a little issue. When I...
Asked on 02/26/2021 by Shoaib Iqbal
1 answerI understand that the generic blockchain faces a problem where it can choose to optimize between scalability, security and decentralization. I can see easily why scalability and decentralization are at...
Asked on 02/26/2021
1 answerI read this article https://medium.com/@robinagist/building-an-ethereum-oracle-with-web3-js-1-0-1272b59cfc31 but there are some things I didn't understand. Does the oracle need a node (like geth or parity) to communicate with the...
Asked on 02/23/2021 by Mario Roma
0 answerMy son is writing a school project on the history of Ethereum and there are a few questions that he has that we've been unable to find online. I...
Asked on 02/22/2021 by Phil Boltt
1 answerI have been trying to follow the web3js documentation, but it mentions things that are not native to Javascript like "Buffer" so I found a library called ethereumjs-tx to let...
Asked on 02/21/2021 by John Murphy
1 answerDoes the Parity Wallet sync when background task is running, or do you have to keep the browser window open? I'm a couple of 100K behind, and I thought...
Asked on 02/21/2021 by NealWalters
1 answerI see a lot of people tout the enormous benefits of using IPFS as a store of data. Meanwhile, the Ethereum blockchain is over 1TB in size, with quesitonable need...
Asked on 02/17/2021 by nick carraway
1 answerI'm able to create an instance of a smart contract that I know works in Ganache using Truffle. But in my Javascript Nodejs app, with the syntax "let contractInstance...
Asked on 02/16/2021
1 answerI am getting a syntax error. I am not sure if its a problem related to 2D mapping or 2D array. My code is given below:contract Stealing{ ...
Asked on 02/14/2021
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