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I'm working on a Smart Contract and it almost ready. To watch transactions I'm using web2js on my server and its working fine. But from a transaction detail how...
Asked on 12/18/2021 by vikujangid
1 answervar EthereumTransaction = require("ethereumjs-tx")var Web3 = require('web3')var web3 = new Web3('http://127.0.0.1:7545')//Setting Receiving and Sending Addressvar sendingAddress = acc1var receivingAddress = acc2//Checking the balance of each account in etherweb3.eth.getBalance(sendingAddress).then(console.log(web3.utils.fromWei('1', 'ether')))web3.eth.getBalance(receivingAddress).then(console.log(web3.utils.fromWei('1',...
Asked on 12/18/2021 by Sreesankar G Warrier
4 answerI would like an array of mappings, is this possible?mapping (address >= value) sentValue;sentValue[] public sentValues;I want to record amounts sent by address, and I want each send event...
Asked on 12/18/2021 by SkyTemple
1 answerWhatever is stored in the blockchain is immutable which means I can fetch this data back in the future. As of today (2016-feb),How does one store a 1kb, 10kb, or...
Asked on 12/16/2021
4 answerI have read many questions about oracle services, but I do not understand how they work.Often I read answers like this: https://ethereum.stackexchange.com/a/9825/5892Smart contract can not access an...
Asked on 12/16/2021
4 answerI'm writing Decentralised Application.I've added function vote() an function changeName().After that my code can't compile on wallet.ethereum.org.Though remix.ethereum.org shows no mistakes.pragma solidity ^0.4.19;contract SimpleDAO { ...
Asked on 12/16/2021 by Anatoly
1 answerI am trying to upload an image to ipfs using ipfs.files.add() functionbut it is causing me this errorUncaught TypeError: Cannot read property 'add' of undefinedat App.onSubmit (App.js:70)at HTMLUnknownElement.callCallback...
Asked on 12/16/2021 by abz
1 answerI am a new to Ethereum and Blockchain, I have been trying execution of Contracts using Metamask and Remix using Chrome browser for sometime. I am trying to deploy the...
Asked on 12/14/2021 by Adheep Mohamed Abdul Kader
2 answerI would like to build a simple smart contract, which can be accessed from "the outside World", meaning I can call methods of the contract from another small application or...
Asked on 12/13/2021 by AleH
1 answerI want to call a solidity function a passing a parameter bytes b. function xyz(address a, bytes hexData) We front end code in Typescript is like that if (hexData)...
Asked on 12/13/2021 by Suzana Maranhão Moreno
1 answerGet help from others!
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