Ethereum Questions, Problems & Solutions : TransWikia.com ~ Page 7

Solidity contract compilation on open github repository

What are the ways to check that all the .sol files in a github repository can be successfully compiled (like travis, circle etc)? Basically I want to check that in...

Asked on 12/09/2021

1 answer

Sign message twice with web3

a quick beginner's question... is it possible to sign a message twice with web3? For example Alice creates a message and signs it. Then it is sent to Bob....

Asked on 12/07/2021 by P_F

1 answer

Using a Non-Fungible token to gain access to a file

Please excuse me, I'm a layperson, not a programmer. At this time is there a way to issue NFT's to be used as a 'key' to gain access to a...

Asked on 12/07/2021 by jayw

3 answer

Signing a request with a signature gives the wrong from address

I am using ethers to get a signed request. I have a signature for the address 0x518171C334AD3adc1cF990A884D67963201B675F. It is, c4b71f516c36468022d61b0e22016c6bc69bc2c99666fb7e63e3d04841c82ff53d5c687ebe43b290d03caa6766e8e957192faa6b360f4102b536c54c3318304f1b. When I use ethers.js, to serialize my transaction with my...

Asked on 12/07/2021 by coder123

1 answer

Failed to use truffle develop

When I successfully compiled and deployed contracts using Truffle and ganache-cli, I typed truffle develop to get into the truffle(develop)>, and then typed let instance = await Factory.deployed(), it then...

Asked on 12/07/2021 by xxs

0 answer

Function to return tuples throws error on frontend

I have similar functions like this and they work fine: function getBarsOfParticipant() external view returns (uint256[], uint16[], bool[]) { uint256[] barIds = participantToBarIds[msg.sender];...

Asked on 12/05/2021 by Mindful

1 answer

Private Company Network

I've got some questions regarding coonecting 2 ethereum nodes (geth) between two different networks: e.g. company A and company B. First, I've already connected two different nodes within the same...

Asked on 12/05/2021 by Max647

1 answer

error in remix IDE

I am facing this type of Error in 'remix IDE' while connecting it to '[email protected]'Error: Failed to decode output: Error: insufficient data for uint256 type (arg="", coderType="uint256", value="0x00")<!DOCTYPE html><head>...

Asked on 12/05/2021 by Parshvi

2 answer

What is the proper way to store timestamp in blockchain?

I am trying to store the timestamp in the blockchain using block.timestamp or now. But that keeps throwing warning asUse of "block.timestamp": "block.timestamp" can be influenced byminers to a...

Asked on 12/05/2021 by NinjaMAN

1 answer

a uint storage variable can't be reset to 0

when test a contract i meet a confusing condition, so i tracked it by commented out per line, and distinguish it's a uint storage variable be reset to 0. To...

Asked on 12/04/2021

1 answer

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