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Ethereum : Recent Questions and Answers (Page 28)

Find answers to your questions about Ethereum or help others by answering their Ethereum questions.

Can we use both centralized and decentralized approach for developing DAPP?

I saw a dapp using Decentralized approach for the buying and selling ERC20 Tokens ..But there's no proof of using the functions defined in smart contract in the web3js library.How...

Asked on 11/30/2020 by developer base

1 answer

Unhandled Rejection (TypeError): this.web3.eth is undefined

My getWeb3.js file:import Web3 from 'web3'export default async () => { var web3Provider = null; if (typeof window.ethereum !== "undefined") { ...

Asked on 11/29/2020 by Chan Austin

2 answer

What is the expected daily egress traffic from full Testnet node

I have a full testnet node running on GCP with Parity. After about a week of having it fully synced, the egress traffic from the server spiked substantially and started...

Asked on 11/27/2020 by leo_cape

0 answer

Synchronizing test and web3 enabled nodejs service

I have a test suite running in truffle, and an external web3 connected node service running - both connected to a ganache-cli network. My problem is: my tests are supposed...

Asked on 11/26/2020 by Zach_is_my_name

1 answer

Error: [ethjs-query] while formatting outputs from RPC: "message":"invalid sender"

I'm using MetaMask with an app I'm developing, and previously working functions are now returning a quite ferocious error. This error has been duplicated on a number of functions in...

Asked on 11/26/2020 by The Renaissance

0 answer

Chainlink not updating variables in Ethereum Smart Contract

I am having a strange thing occuring on kovan network. I am running a smart contract calling my chainlink oracle to request some information. My chainlink oracle responds correctly with...

Asked on 11/25/2020 by phivms

1 answer

Reason for a transaction and 2 cancelling transactions being stuck?

I sent a transaction. Shortly after, I decided to cancel it, so made a cancel transaction (using MetaMask). After a while, since nothing was happening, I sped up the cancel...

Asked on 11/23/2020 by Ixx

1 answer

Are current ethereum opcodes prices in pyethereum updated?

I am not an expert in opcodes for Ethereum, but I am wondering if their prices here [https://github.com/ethereum/pyethereum/blob/develop/ethereum/opcodes.py] are updated as the latest version used by other...

Asked on 11/22/2020 by MWH

2 answer

getting the latest holders address:balance for a smart contract

I managed to get all the transfer events from any given smart contract, but now I need to reduce that to current holder any idea how I would do this?...

Asked on 11/21/2020 by Lucas Rodriguez Benitez

1 answer

Token migration and IDEX smart contract problem

During a recent token migration from token A to token B, a large number of token A were held by a number of people in an IDEX address (where it...

Asked on 11/21/2020 by Crypto Lemma

1 answer

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