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Ethereum : Recent Questions and Answers (Page 30)

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

Call deployed smart contract from web3.js

I have small test smart contract, which is deployed to my test network. And I want to use a server to call the function in the contract. Here is the...

Asked on 10/23/2020 by Chun-Wei Chiang

2 answer

speed drops after "got new package" and then gets back to normal after few seconds

Please check the below image. The mining speed drops after "got new package" and gets back to normal after some time. Can anyone tell me if it is a normal...

Asked on 10/15/2020 by Naveen Margan

1 answer

Massive Download [ETH] smart contracts

This question have just been published in StackOverflow as well, but you might be able to guide me on a better direction: I'm looking for the most valid path to...

Asked on 10/13/2020 by Chris Russo

2 answer

Canceled a transaction and no longer saw my ether in metamask wallet

I was sending 14.793776530278380275 ($5,744.42 at the time) worth of ether over to binance. I set the gas fee to be at the max and waited for the transaction for...

Asked on 10/11/2020 by HectorT98

0 answer

Deployed bytecode size seems to mismatch contract code size

I See some very weird solc behaviour with regards to compiled bytecode size.A much shorter contract compiles to bigger byte code. short contract: compiles into 439...

Asked on 10/06/2020 by Ilan Dshare

1 answer

Could smart contract use a fork block?

If generated two forked block A and B.Can the smart contract in block A access to transaction in block B? I know that PoS is consensus algorithm working by...

Asked on 09/20/2020 by rapael

2 answer

What are some real world use cases for state channels?

Are there any state channel implementations being used today, or in development? (Not including payment channels) I'm interested in practical use cases rather than theoretical examples like playing chess on...

Asked on 09/13/2020 by Darius

1 answer

What is the best way to deploy and test smart contracts on multiple machines?

I have recently started developement on Ethereum and the concepts are pretty much new to me. I need to test event emitting/listening on multiple machines for my contract. For the...

Asked on 09/03/2020 by Tanay Bhartia

1 answer

Can I use approve/transferfrom function for ETH coin?

Can I use approve/transferfrom function for ETH coin?Please let me know how to apply approve/transferfrom to ETH as erc20 tokens. Thank you!...

Asked on 09/01/2020 by ikaop

1 answer

Truffle Bytecode Different from Etherscan Bytecode

I am having difficulty verifying my contract code on Etherscan using the code generated by Truffle.Using Etherscan VerifyContract V1: https://rinkeby.etherscan.io/verifyContractTruffle produced the bytecode: (found...

Asked on 08/28/2020 by Nyxynyx

1 answer

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