How to write to a smart contract with infura web3 provider

sandaruwan_wijerathn · December 27, 2018, 6:00am

Hi all,
I’m a fresh person to the block chain world and these days i’m learning about smart contracts and etherium. So i have wrote a simple smart contract in solidity which was a decentralized voting app and I have used the infura as web3 provider. Retrieve data from smart contract was successful but my question is how do I write data to the contract. I knew that write to the blockchain cost gas and I already installed the metamask extension. How I use these things together to write a vote to the voting app using web3js. If anyone can help me please.
Here the smart contract…

gist.github.com

https://gist.github.com/DonSHack/06e6acbb7c46f55ff14e7e7ea0b815e8

Election.sol

pragma solidity ^0.4.24;

contract Election{
    address private owner;
    
    struct Candidate{
        string name;
        address acc_address;
        uint256 num_of_votes;
    }

This file has been truncated. show original

egalano · January 4, 2019, 8:27am

Welcome to the blockchain space! In general, to write to an Ethereum smart contract you are submitting a transaction to the Ethereum network. This is a good write-up I refer people to that would like to better understand the details of an eth_call method invocation. It is part of a larger series on Ethereum smart contracts. I highly encourage you to check out the whole thing. Best of luck.

JayM · March 17, 2021, 9:37pm

Did you intend to have a link in “this is a good writeup”?

traian.vila · March 18, 2021, 7:49pm

@JayM check this out https://blog.infura.io/deploying-smart-contracts-managing-transactions-ethereum/?utm_source=social&utm_medium=community&utm_campaign=Tutorials